||ggE1g1ffiXEEl121i1i EnergyS 8ector Management A&istanceProgramme Power Rehabilitation ad Techn ica Asoistance Report No. 142/91 JOINT UNDP/WORLD BANK ENERGY SECTOR MANAGEMENT ASSISTANCE PROGRAMME (ESMAP) PURPOS-E The Joint UNDP/World Bank Energy Sector Management Assistance Programme (ESMAP) was launched in 1983 to complement the Energy Assessment Programme which had been established three years earlier. An international Commission was convened in 1990 to address the creation of ESMAP's role in the Nineties. It concluded that the Programme had a crucial part to play over the next decade in assisting the de'eloping countries to better manage their energy sectors given that the supply of energy at reasonable prices is a critical determinant of the pace and magnitude of the growth process. The Commission's recommendations received broad endorsement at the November 1990 ESMAP Annual Meeting. Today, ESMAP is carrying out energy asses;ments, preinvestment and prefeasibility activities and is providing institutional and policy advice. The program aims to strengthen the impact of bilateral and multilateral resources and prvate sector investment through providing technical assistance to the energy sector of developing countries. The fndings and recommendations emerging from ESMAP activities provide govermuents, dorors, and potential investors with the information needed to identify economically and environmentally sound energy projects and to accelerate their preparatton and implementation. ESMAP's operational activities are managed by two Divisions within the Industry and Energy Department at the World Bank and an ESMAP Secretariat. * The Programme's activities are governed by the ESMAP Consultative Group which consists of its co- sponsors, the UNDP and the World Bank, the govermments which provide financial support and representatives of the recipients of its assistance. The Chairman of the Group is the World Bank's Vice President, Sector Policy and Research. HA is assisted by a Secretariat headed by the Group's Executive Secretary who is also responsible for relations with the donors and securing funding for the Programme's activities. The Secretariat also gives support and advice to a Technical Advisory Group of independent energy experts which meets periodically to review and scrutinize the Programme's strategic agenda, its work program and other issues related to ESMAP's functioning. 0 The ESMAP Strategy and Programs Division is responsible for advising on which countries should receive ESMAP assistance, preparing relevant ESMAP programs of technical assistance to these countries and supports the Secretariat on funding issues. It also carries out uroadly based studies such as energy assessments. e The ESMAP Operations Division is responsible for the detailed design and implementation of tasks consisting mainly of sub-sectoral strategy formulation, preinvestment work, institutional studies, technical assistance and training within the framework of overall ESMAP country assistance programs. The ESMAP represents a cooperative international effort supported by the World Bank, the U-dted Nations Development Programme and other United Nations agencies, the European Community, Organization of American States (OAS), Latin American Energy Organization (OLADE), and a number of countries including Australia, Belgium, Canada, Denmark, Germany, Finland, France, Iceland, Ireland, Italy, Japan, the Netherlands, New Zealand, Norway, Portugal, Sweden, Switzerland, the United Kingdom and the United States. FURERE INFORMATION For fiuther information or copies of completed ESMAP reports, contact: Office of the Director QR The Executive Secretary Industry and Energy Department ESMAP Consultative Group The World Bank The World Bank 1818 H Street N.W. 1818 H Street, N.W. Washington, D.C. 20433 Washington, D.C. 20433 U.S.A. U.S.A. ANGOLA POWZR ALITATION AND TENICAL ASSSfTANCE PRIORTIESFOR INVESTNMNT AND TECHIMCAL ASSITANCE IN THE ELECTIC POWER SECTOR October 1991 To Word Bank Wa ton, D. C. 20433 MThdcisa has retrcted dlsutuludon and may be use by recIpIent only In do pedommp of th* offical dati. oo may no otenws be didn wkotUD oodBn ABSTRACT Economic and political dislocations since 1975 have left the country with virtaly no compete maagerial, technical, or skilled staff. Although Angolan electic utilities are striving to maintin sevioe, the power sector has suffered more than a decade of neglect. This has been mainly caused by the economic crisis ad damage to physical assets as a result of sabotage and the ravages of the civil war as well as shortages of skilled personnel at all levels and lack of adequate sector management. The Declaration of Peace signed on May 31, 1991, has focussed attention on the task of reconstruction, which will include economic reforms, rehabilitation of the physical infrastructure as well as training in the efficient operation and maintence of the electric power system after rabilitation. The proposals made in this report are designed to: increase the effectiveness of the power sector by resablishing electricity supply to eonomicaSly key areas; improve local capacity to rehabilitate and expand the electric networks; and lay the foundation for more efficient use of energy resources, sector reorganization and greater atention to the environmental impact of energy resource use. The proposals include rehabilitation of the physical facilities including hydro and thermal plants, the distition networks of Luada, Lobito and Benpela and Huambo, as well as the main transmission ln in the Northern, Central and Southern Systems. The report recommends dth the highest priority in t rehabiitation program should be given to transmission lines. The areas of activities that are proposed as the core of the technical assistance component to the electric utilities are: accounting, stock management, instiution strengthening - particularly in manpower trahing, and in the coordination and management of ongoing and future rehabilitaion projects. A twinning arTgemenut with an operating utility or consortium is proposed for the management of the rehabilitaton program. Such an arrngement would facilitate the transition from rehabilitation to opion and maance of the rehabilitated system and practical training of technicians. Although the Capanda hydroelectric project did not represent the least-cost investment when hie project was begun, it now hs reached a stage of completion where it is no longer economically feasible to abandon k. he recommended total investment in direct rehabilitation eeses as well as technical astance amounts to US$ 343 million, adjusted to Januay 1990 price levels. At present France, Portugal, haly, Spain, Sweden, Norway, and the Affican Developmet Bank have approved or are negotiating finani for rehabil of the Angola power system, in an amount close to US$ 145 million. A finacing gp of about US$ 198 million therefore remains tO be closed if aU rom ons for equipme and servces are to be Implemented. z S ]ng g XI lMI 1 > ~~jSl } stl | tS |1i,|11t§axXX;t§fliXl'i2i4 ABBREVIATIONS AND ACRONYMS ASDI Swedish Intationd Development Agency BAD Banque Afticain de Developpemeont BEP Belgn Engineering Promotion BNA Banco Nacional de Angola (the Central Bank) CELB Companhfa Eltlca do Lobito e Bengula CNO Construtora Norberto Odebrecht DNACO National Directrate for the Conservation of Nature EDEL Empresa de Electricidade de Luanda EDP Electricade do Portugal ELI Envronmental Imort Assessment ELF French oil company ENDIAMA Empresa Nacional de Diaman_t de Angola ENE Empresa Nacional de Electricidade ESMAP Joint UNDP/World Bank Energy Sector Maagem Assce Progrm FAD Ftond Africain de Developpement PURNAS Furnas Centra Electica, a Brazflian utility GAM11 Gabinete de Aproveitamento de Medio Kwanza (Office for the anessing of the Middle Kwanza) HEAC Hidro Eldctrica do Alto Catumbela BRD Inrnational Bank for Reconstruction and Development INP Insttuo Nacional de Petrdleo JPEA lunt Provincial do Electrificaao de Angola (udlity of Southern Angola) MEP Ministerlo de Energa e Petr6leo (Miistry of Energy and Petroleum 1/ MPIA Pr Movime Popular de Lia9o de Angola OGE Orgamento Geral do Estado (General Budget) RAHL ReabilitaWwo do Aproveitamento Hidroel6 ctroo de Lamaum SADCC Southern African Development Coordination Conference SEEA Secreta do Estado de Energia e Agua SE*S,eP S tEcondmico e Financeito (Pogam for Economic and Financial Resucturing) SIDA Swedish Inmational Development Agency SONANGOL Sociedade Nacional de Combustiveis de Angola (State oil company) SONEFE Sociedade Nacional do Estudo e Fimclamento de cdn Ulltrimain (Northern Angola Utility) TAU Techicai ad Administrative Unit (P tergy) of SADCC TPE Tedhopromexport (Sovet Engbine g company) UNDP United Nadons Development Program UNIDO Unied Nations Industri Developmet Orgniation 11 Rlaed by a SemOAt of Se for Enuuy ad Waer, and a Witry of P*olmm. FOREWORD The Report is based in part on the findings of an ESMAP Power Subsector Investment Review Mision which visited Angola during January/Febuary 1990 and a Project Prepaation Mission which ise Angola during June 1991. The 1990 mission consisted of Messrs. Michel Del Buono, Senior Economist, Mision Leader; Kurt P. Schenk, Power Engeer, Deputy Mission Leader; Ms. E. Battaglini, Economist; Messrs. J. Bapdsta, Power Engineer/Economist; C. Alves de Cruz and Camilo M. .Ferreira da Silva, Hydro Plant SpeC'alists, C. Madureira, Power Systems Plaing Expert; P. Bernardln, Accounting, Or ion and Isitional Expert; L. Rivera, Fimcial Analyst; 0. Selleri, Hydro Plant Planning and Constuction Expeot; A. Corsini, Thermal Power and Tunsssion Lie Expert; L. Brambilla and M. Scarfi', Electical Distribution Experts; an Ms. M. Kronen, Environmenal Expert. Mr. J. Jaslewicz, Seior Power Engineer, DTCD, also participated in and contributed to the work of the mission. Ihe main autwhs of this report are Messrs. Michel Del Buono, Kurt F. Scheak, and Winston Hay. The 1590 mission identified and costed a number of investment prioritdes in the electric power subwetor which centered on repair, rehabilitation and resumed mainteance of existing facilities and prepared a tecical amsistance program for the power utilities to help design and Implement a priority rehilitation program and to train their engineering staff in the sklls needed to undertake that work and to matain the system subsequendy. The 1991 mission reviewed the Yellow Cover Report with the Angola Government. Ihe mision consisted of a joint team from ESMAP and the Region (AF31E). Ihe ESMAP mission team cosisted of Messrs. Kurt F. Schenk, Mission Leader, and Joao Baptista. Ihe region team members consisted of Messrs. David Huga (Senior Economist, AFTIE) and Bocar Thiam (Principal Advisor, Power Sector, AF3IE). Because of the recent peac agreement of May 31, 1991, the 1991 mission revised the priorities fo rehabilitaion and tncal assistance. It also updated many of the cost estimates. ITese hanges were described in the mission's 4lLde-Memoire which was agreed with the Govement and from which a project for apprial has been defined. Both miions were preceded by another ESMAP mission to Angola (Apr/May 1987) which had ecommended that strong measures would be required immeiaty to O) improve the financial performance of the electric utilities; (if) strengthen the utlities' opetional and managerial capabilities, Including accoutig, billing and collecdon syrtems; (ii) reorganize the subsector to provide more internal managerial automy and, most importandy; (Iv) reurient the invetmet program to avor rehabiitation of the exlising physical infcture rather than expansions of capacity. This report makes partclar reference to Report No. 7408 ANGQOA: lses and Options in lhe Enenv Se which was published in May 1989, since it already covers much of the material on the enecgy and power sub-sectors. For completeness, some of the material is repeated herein. The cpation by the Government of Angola is gSrefully acmowledged, pariularly the Secretariat of Eegy and Water (formerly the Miistry of Energ and Petroleum); the electric udlities ENE, SONEE, EDEL and CELB; GAMEK, which is in charge of the development of the river Kwanza as wel as SONANGOL, and INP. The finacal and logistical support of UNDP and SIDA made thi work possible. JOINT UNDP/WORLD BANK ENERGY SECrOR MANAGEMENT ASSISTANCE PROGRAM (ESMAP) ANGOLA: POWER AND TECIIICAL ASIUSTANCE PiRIORIPS 1FOR INVESSM AND TECHNCAL ASSIANCE IN THE ELECTISC POWER SECTOR TABLr. OF CONTENTS Page EXECUTIVE SUMMARY ............................................. i I. THE ENERGY SECORR ......... * ........ 1 Geeral Overview ....... . ............... I Eneg Resources ...........................................*.... 1 Eergy Sector Otgalzatlon ........................ . ........... *.. 3 UI. 'THE POWER SECTOR ...... .. ...*.*.*..*.*.*.*.*.*............ 4 Genera Overview ............................................ . 4 VgallizaXon of the Power Subsor and InsXdorad Isues .................. 4 Power Supply Fac1lities ........................................*. 6 Pat and Presen Electricty Consumption and Demand Projections .............. t RaihabSihttioiNeeas ... .......................... ............. 13 Human Resurces at Eleric Utilis, Technical Assiac and TraIning ......... 18 Financil Siuton and Pefomce, Tariff, Acc tng, Billing and Coliecloin Blectic UtUities .... .................... ....... 20 The C(panda Hydrodectric Prctect ............................... ... 22 EnvronmealAspw inAngola .................................. 24 MI. POWER SECTOR REHABUITATION AND TECHNICAL ASSISTANCE PROGRAM . 26 Bacgound .................... ............................ 26 Program Objectves ......................................... 27 TechnicalCdtda ......................................... 28 Poitbry PowerR nandTechcal AsslWt Prgrm ............... 29 Main Fetus and Cost Etmates of the Priority bii d T'ecinical slstance Program ................................ . 32 Basl of Cost Ist lte........................... .. .......†4.4 34 Po t .. . ... ......................... 34 Stock Managent ..................t.444.44.4.4 ...4. 4... . 35 Progan Managmnt ..................44.. 44444444444444.. 35 Prelibunary Wors .......................4..4..444444........ 36 Hyatode ndic 1ennal Pla .......................... ........ 38 TranumnlsaioLims ...........................44444444 44 DistribtSystems ............................. .....4.,4.44 45 nstl_ton g ..... * .............. ......... 49 Justification d s 444..44.....444 44... 4 44......4...4 4...44 4 4...44 58 TABLES Table 0.1: HIGH AND LOW tUNRESTRICTED DEMAND GROWTH FORECASTS FOR THE THREE SYSTEMS ....................... v Table 0.2: ANGOLA POWER SECTOR REHABILITATION PROGRAM ............. x Tatie 2.1. INSTALLED AND AVAILABLE CAPACITY AND PEAK DEMAND Qianuary 1990) ....... .. 6 Table 2.2. HISTORICAL ELECICTY U YENERATION BY SYSTEM .............. 7 Table 2.3 ELECTICITY CONSUMFiION IN ANGOLA 1982-1989 ........... .... 9 Table 2.4: HISTORICAL MANUFACTURING INDUSTRIAL CAPACITY INDEXES ............................................ 10 Table2.5: ASSUMEDSCENARIOS OF DEMAND EVOlUTION ................ 12 Table 2.6: CAPANDA. BREAKDOWN OF BUDGETED A4MOUNTS (1985-1994) ...... 23 Table 3.1: ANGOLA POWER SECTOR REHABILITATION PROGRAM ........... . 33 Table 3.2: PRELUMNARY WORKS ........ ........................... 36 Table 3.3: GENERATING PLANTS ....... ........................... 39 Table 3.4: TRANSl-ISSION LIM ................. ................... 44 Table 3.5: LUANDA DISTRIBUTION ............. .................... 46 Table3.6: LOBITO-BENGUELA DISTRIBUTION .......................... 49 Table3.7: TRAINING ..9*. .50 Table 3.8: TECHNICAL ASSISTANCE: Blli and Collection .................aC t.. 54 Table 3.9: TECHNICAL ASSISTANCE AND TRAINING IN ACCOUNTING ......... 56 TabeI3.10: TECHNICAL ASSISTANCE:GeneratingPlants . .................... 57 Table 3.11: TECHNICAL ASSISTANCE: Rehabilitation Program Management ......... 58 A.NNEXES ANNEX 2.1 INSTALLED CAPACrTY AND GENERATION IN ANGOLA . .......... 62 ANNEX 2.2 HYDRO PLANTS - CURRENT SITUATION AND ACTIONS IN PROGRESS ................... ...................... 66 ANNEX 2.3 THERMAL PLANTS - CURRENT SITUATION AND ACTIONS IN PROGRESS . ........................................ 74 ANNEX 2.4 MAIN TRANSMISSION LINES - LINE CHARACTESTICS ........... 76 ANNEX 2.5 DISTRIBUTION SYSTEM IN LUANDA PROVINCE CHARACTERZATION OF THE PRESENT SITUATION AND ACnONS IN PROGRESS ..... ............................. 77 ANNEX 2.6 DISTRIBUTION SYSTEMS IN LOBITO-BENGUELA CHARACTERIZATION OF THE PRESENT SITUATION AND ACIIONS IN PROGRESS .................................. 81 ANNEX 2.7 WORK FORCE DISTRIBUTION AT ENE, SONEFE, EDEL AND CEIB ..... ...................................... 85 ANNEX 3.1 HYDROLECTRIC FACMTES - ADDIONAL DETAILS OF REHABIlITATION AND TECHNICAL ASSISTANCE PROGRAM ............. ......... ...................... 89 ANNEX 3.2 EXPECTED LOAD GROWTH AND INCREASE IN NUMBER OF CONSUMvERS ......... . ................... 97 ANNEX 3.3 DISTRBUTION SYSTEM OF LUANDA - SYSTEM PERFORMANCE AND PMIORTrY MEASURES FOR EFFICIENT OPERATION ......... 99 ANNEX 3.4 REHABILIATION AND UPGRADING WORKS IN LUANDA ,........ 103 ANNEX 3.5 DISRBUTIONSYSTEMS OF LOBITO-BENGUELA PROVINCE SYSTEM PERFORMANCE AND PRIORITY MEASURES FOR EFICIENT OPERATION ................................. 106 ANNEX 3.6 REHABILITATION AND UPGRADING WORKS FOR LOBITO-BENGUELA ....................... ................. 108 ANNEX 3.7 SUGGESTED COURSES FOR MANPOWER TRANING AND ESTIMATED COSTS-DISTRIBUTION SYSTEMS ...... ..................... 111 ANNEX 3.8 STAFF, EQUIPMENT AND FACILTES OF THE O&M DEPARTMENT OF EDEL ......... . .... .. ... .. .......... 114 ANNEX 3.9 TECHNICAL ASSISTANCE FOR REORGANIZATION OF THE OPERATION AND MAINTENANCE GROUPS AT EDEL, SONEFE, AND CELB - DISTRIUTION SYSTEMS ............................. llS ANNEX 3.10 MINIMUM OPERATION AND MAINTENANCE TEAM FOR A HYDROELECMC STATION .......................... 117 ANNEX 3.11 TECHNICAL ASSISTANCE FOR ENE AND SONEFE ............... . 118 ANNEX 3.12 SUMMARY DESCRIPTION OF TECHNICAL AS'ISTANCE FOR ACCOUNTING, READING, BILIlNG AND COLLECTION AND ASSOCLATED EQUIPMENT - ENE, EDEL AND CELB ............. .. 119 ANNEX 3.13 GENERAL TECHNICAL TRAINING FOR ALL ELECTRIC UTILTES .... 121, ANNEX 3.14 DETAI OF REHABILITATION WORKS OF THE TRANSMISSIONSYSTEM .... ............................. 123 EXECUTE SUMMARY 1. lbe Republic of Angola has suffered from the ravages of a civil war since attaining its indqendence in 1975. Political and economic dislocations since then have left the country seriously depxeted of managerial, tcnical and other skilled human reources. These factors have contributed to a severe shortage of foreign exchange, despite the country's position as one of sub-Saharan Africa's largest oil exponers. 2. The declaraion of peace signed on May 31, 1991 has focussed attention on the task of reconstruction, which wll include economic reforms and rehabilitation of the infrastructure needed for renewed development. In 1989 the Government of Angola (GoA) requested assistance from the joint UNDP/World lank Energy Sector Managemet Assistance Program (ESMAP), to identify the rehabilitation needs of the electic power sector and to develop the co-responding cost estimates. Funds to cover te direct cosu of that assistance were provided by the United NJations Development Program (JNDP) and the Swedish nterational Development Authority (SIDA). 3. An ESMA mission I/ visited Angola in January/February 1990 to establish the priorities for rehabilitation c'f the power systems and t develop a program by which the utilities concered could implement the k identified and mainta the systems in satisfactory operating condition thereaftr. As the civil war was continuing at the time of the mission and travel was restricted in many areas, the mision's terms of reference limited the scope of its work to major genrting plant (excluding diesel uns rated below 2 MW), transmission lines and the distibution systems in Luanda and LobitolBenuela. The isolated power systems were excluded from the mission's investigations. Even with this restricted scope of work it was not possible to visit all of the important physical facilities and many of the mission's conclusions ae based on reported evidence. 4. A subsequent ESMAP wission 2/, undertaken jointly with the Region (LA3IE) visited Angola in June 1991 with the objective to revise the Yellow Cover Report (YCR) produced from the finding and recomndns of the 1990 mnssion. The priorities contned in the YCR were dicted prmaly by the war stuaon wbicl. meant basically at rehabilitation of the main transmission lines was relegated for late ction. The Declaration of Peace as well as bilateral funding awarded in the meantime to seveal of the inWally proposed tasks, made it imperadve to change the priorties of the YCR. This IV Ihe misn compoind as SMP staff Me4ss. M del Buono, Sor Ecnomi and Missin Leader;, Kut Scdmk, Poe Enginee, Deputy Misson Leador, Ms. B. BDatagbi, Eonomist; as consukat Messn. J. B4da, Powe Eonerl/ oonot C. de Cruz and C. dSiln, Hydro Plat Specialists; C. Madureira, Power Ssm Paer, P. Bhradin, Orniaon Ripest; L. Rivea, Fiancial Ana; G. SeRi, Hydro Construion tinegw, A. Corsin, Thermal Power Stion nd hnsmision ineer, L. Brambill and M. Scarfi', Distution En eo; and Ma M. Klen, EConk Catuu a' m/ mbs sompised as ESMAP daff Mr. IL Schek, Power Spooel and Mission Leader, as Bank staff L3AE!) Mws. D. Hlurt, Princil Eoonomist and B. amn, Pnia Advisor, Power Group; and as conultant Mr. J. 8spa Powr Euglmermcoo report preents a reordering of the priorities as agreed with Angolan autfiorities during the mission of 1991. S. Although Angola is richly endowed with hydrocarbon and hydropower resources, the electificadon ratio and per capita electricity consumpdon is relatively low even by sub-Saharan African standards. In 1990 it was esdtmated that only one in 15 houses was electrified and that the average per capita consumption for the country at large was 56 kWh per anum. 6. Electricity supply In Angola comprises three sepaate grids and a umber of small Isolated systems. Figure Al of the annex to this report is a map of Angola showing the locations of the major power stations and the routes of transmlssion lines operating at voltage levels of 60 kV and above. The mn syems are the Northern, Central and Southern with installed generating capacities of 254, 110 a 53 MW respectively. Aggregate nameplate generating capacity of the isolated systems is 45 MW. The country-wide istalled capacity is therefore 462 MW (1990), of which 62% is in hydro, ectric saons, 22% in gas turbines and 16% in diesels. The total available capacity is less tdu 250 MW due to deradng or unavailability of generating plant, primarily as a result of lack of maintenance. A list of italled generating capacity in Angola is given in Table 1 in Annex 2.1. 7. Th No r supplies the area bounded roughly by the main population centers of Ulge in the north, Luanda in the west, Malanje to the east, and Gabela in the south. The major source of generation in this region is the Cabambe hydroelectric station, rated at 180 MW. In addition two gas turbines wth a combined capacly of 56 MW are installed in the capital city of Luanda. A new 40 MW a/ gas turbine, at a cost of 31.5 million of swiss francs (including spares and training), is expected on line early in 1992. The Mbubas run of river hydroelectric station with nomin capacity of 18 MW Is currenty out of service but undergoing rehabilitation. Luanda, with a p-ak demand of 123 MW in 1990, Is by far the Irgest single load center in Angola. Transmission voltages are 220 kV (from Cambambe to the load centers of Luanda, N'dalatando and Gabela). There are also a number of lengths of 100 and 60 kV lines. The two 220 kV lines which connect Luanda with the Cambambe povwr station have been repeatedly sabotaged, making Luanda entirely dependent, for more than 6 monts in 1990, on gas turbines (bring distllate fuel). Medium-voltage distribution systems operate at primarily 15 kV. 8. Although Capanda (on the Kwanza river upstream of Cambambe) did not repreet the least-cost inv tm project when begun in the early 80's, it has now reached a stage of completion where it is no longer feasible to bandon the project. What led to its constuction were optimistic epectations of demand growth and hopes of stimulating industrial developmem in the late 1970's and arly 80's. The desi capacity of this project is 520 MW (4 units of 130 IMIW each). The dam, construction of which began in 1987, is curreny (early 1991) completed to about 65% of its design height of 110 meters. Insllation of electrical and electro-mechanical "Iqment has not yet been sarted, but the mufacte of this equipment is underway in the Soviet Union. Commissioning of the first unit 3/ 47 MW accoidl to DSO standars, reduced to 40 MW in local condiios ' Hi{ - Is sdhedu for mid-1993 wili the second following wvhin 6 mouts. However, financing for the tasIssion lW betwen Capanda and Cambambe has not yet been secured and could delay the date on which th plant enters senvice as construction will take nely two years. The schedule for commissioning of the third and forh units has not yet been devloped. 9. Tn2 C=d provides supply to the pvices of BDenguela and Huambo which rank mmediately behind Luanda in terms of populRton desity ad lndustrial development. Power is provided by the hydoelectric stations Lomaum (35 MW but unavailable at prese) and Bloplo (14 MW) both in Bepdgula province, two gas turbines - Bloplo (ratd a 23 MW but biop le at present) and Huambo (13.5 MW but deraed to 10 MW beca of altiude) and a nmbr of diesel stations which together have a nomina rating of 28 MW (only 6 MW availablo at prest). Trnsmisson line operat at 150 kV and medium voltae ditribuon at 30 and 20 kV. Bocau of cii war damage to the transmission line between Lobito and Huambo, the central system now operates as two isolated systems. The maximum demand in Lobito/Benguela Is curreny about 22 MW. 10. T supplies the provinces of Namibe, Hulla and Cuando Cubango. The generation sources are a 27 MW hydroeectric station at Mata and S diel station with aggregate mmeplae capy of 25 MW. Transmssion lines opera at 1SO kV for the secdons from Matala to Lubang and to Jamba. Other transmission lines opert at 60 kV. Tho modium voltage distribution level is kV. i1. EW In= of wbich there are seven have a tot istalled capacity of about 45 MW nominal. Tbe Installed capacies of these systems ange from 12 to 0.3 MW, and the plant compris a mix of hydro and diese units with a single g turbine. The mision's scope of work did nt Inlude the iolaed systems. 12. amrs SI t Qn Ee:ctricity supply In Angola is the responsibility of the SEBA (Secteta do Estado de Energ o Aau) is administred by four steownd entepries: (a) Emps Naclona de El=kAdadg MM. ENE was created in 1980 and with the objecdve of evelly becoming the sole operatg gncy in the Angolan power sector. Ibe company curredly opats the Ceal and Southern as wel as the isolated systems and, In addition, undertakes dtribui on in the areas not covered by any of the other agencies listed below; (b) O& NAeoa de Edt a de lSONEFE2. SONEF.E is responsible for generatio and trsmission in the Nortern system, the lagest In the country. In addtion it provid suWly to about 500 industrial ad cbmmcl consumers which tak power at 60, 30 and 15 kV; (c) im dmAaJIgk1 fId2 LMAA =HU. EDEL administers ditribution in Luada - iv - td) baE do it Bond, (MM. CELB is responsible for distribution in the cena population centers of Lobito and Benguela; and (e) A W. GAMEK was established in 1982 as an agency directly under the Ministry of Energy and Petroleum and charged with responsibility for all task associated with the execution of the Capanda hydroelectric project mentioned in paraph 7 above. lismd4JoAnand1i LAm For 13. The civil war which ravaged the country since independence In 1975 has meant that the levels of electricity demand and consumption which were realized in 1974 have not yet been surpassed. In 1974 total electricity generation in Angola was 1029 GWL, and declined sharply thereafter, sinking to 532 GWh in 1976. Energy generation has Increased irregularly since then and reached 844 GWh in 1989. Tbe fall off in electicity consumption has been particularly pronounced in the industrial sector since only about twenty five percent of Angola's nom industrial capacity is active. 14. Given current conditions in Angola it is difficult to make confident projections for power demand and consumption. Records of past power system performance are inadequate and unreliable and the economic framework is unstable. On the basis of the best available data, a range of demand forecasts (unrestricted) has been developed for this report for the period 1990 to 2000 and is shown in Table 1 below. The forecasts are made in a range of high and low scenarios, and demands somewhere within the range are considered to be realistic expectations. Both scenarios assume cessation of civil war activities. For the northern system the high and low scenarios correspond to rates of growth of 90 and 5% respectively. Rates of growth higher than in the north are projected for both scenarios in the ctntral system becase of the extent to which demand is currently suppressed. 15. The higher demand growth is considered to be the more likely scenario. Recommendations for rehabilitation and upgrading of the distributon systems have been developed on the expectation that demand will follow the high projections. The ecowmics of generation expanson alternatives were evaluated for both the higher and lower rates of growth in order to test the sensitivity to the rate of increase in demand. DM Fnil ities and Rehabflitation Nees 16. Genera. The rehabilitation needs of the isolated systems were not included in the mission's scope of work. Diesel generatg units rated less than 2 MW were also not evaluated. 17. Noern Sytem - Hfydr Stations. Of the four units in the station (4 x 45 MW), No. 1 has been recently rehabilitated, ion of No. 2 is currently in progres and work on the other two uni has been deferred in lien of the expected ommlssio-ing of the first Capanda units -v - in 1993. The Mabubas station ((2x3)MW+(2x6)MW) has been under rehabilitation for an extended period but because of Its age, relatively low output and unreliability is not attended to as a priority. Table 0.1: HIGH AND LOW UNRESTRICTED DEMAND GROWTH FORECASTS FOR THE THREE SYSTEMS (Forecasts made in 1990) D aridon 1990 1991 1992 1993 1994 1995 2000 Total Gknuation (GMh) 730 766 820 U6 974 1091 1789 PFak Load OM) 132 139 149 161 177 197 324 NORTH0RN SYSTEM LOW SCENARIO Toad Geeation (OMh) 727 765 807 854 904 959 1302 Peak Load(MW) 132 138 146 155 164 174 236 mIH SCENARIO l. It Gmnation (GWh) 133 149 163 193 222 255 434 Ptak Load OMW) 24 27 31 35 41 47 79 CETRAL SYSTEM LOW SCENARIO Totd Gknration (GWh) 128 137 147 157 168 180 294 _ PkLoad(W) 24 25 27 29 31 34 54 nHIH SCENARIO Totd OGeneraon (GWh) 68 73 80 90 1O4 1IS 169 Pbak Load(Mw) 14 1S 16 18 21 23 34 SOUTHERN SYSTEM LOW SCENARIO Tota Gation (GWh) 66 70 74 78 83 88 141 Pe Nak loadW) 14 15 16 17 19 21 30 18. Northe Syst - Ga turbines The two gas turbines in Lunda (25.6 MW and 31.2 MW) have been in condnuous service for prolonged periods of time since sabotage action has often taken the 220 kV transmision lines out of service. Since these units use dillate as ftiel, their operating cost are high. Both units are in need of rehabilitation and together can cunty (June 1991) genate less than 50 MW. A tird gas turbine of 47 MW rated capacity (40 MW In Luanda temperatre and humidity contions) is scheduled for commissioning in Luanda in February 1992. 19. Cea System - Hydro Sttions. The three units in the station (2lO)MW+ (lxl5)MW) ~~~~~~~~4 - 81 - ANNEX 2.6 Page 1 of 4 I)ISTRlBUTION Sli =sTM 0f LOBlTO ENDUIAL CHAWMZA DE T11E PRISENT SITUA7lON AND ACIIOS IN PROG=SS Pment Sioat 1. The distribution of electricity in the province of Lobito-Benguela h the responsibility of CELB and coordinated by ENE. The Lobito-Benguela area is located on the Atantic coast, in the ceral region of Angola, approximately 500 km south of Luanda. The distribution system of Lobito-Benguela b supplied througb 150 kV and 60 kV lines by the 22 MW gas turbine and 18 MVA hydro plant at Biopio as well as by a 4x5 MW carriage-mounted diesel plant. Present available capacity from these stations is limited to 15.8 MW. The maximum unre-stricted demad in 1990 was esdmated to be 24 MVA (19.2 MW at 0.8 power factor). Table 1 outlines the main network facilities in Lobito-Benguela. Presendy, the electric system in the province of Lobito-Benguela relies on four voltage levels: (a) l.$Q kV level - for the supply of the Quileva substation, feeding part of the province. (b) 6Q0kV leve - for the supply of the remaining distribution network through the Catumbela substion, (c) 30 kY levl - for the supply of the secondary 30/0.380 kV' substations of the Catumbela area, of the Lobito suburbs and of the Baia Farta area, as well as for the supply of the 30/20 kV substations of Lobito and Benguela, (d) Z k level - for the supply of the remaining secondary 20/0.380 kV substations of the province. 2. The 150 kV line linking Biopio-Quileva and the 60 kV lines linking the Blopio and the Catumbela substations, although old, are generally in good condition. The secondary MV network operation is quite clumsy. Generally, the performance of the overhead MV network, both at 20 kV and 30 kV, is good. Conversely, the underground network is in very poor conditon, with frequent outages. The cause of these disruptions is the result of corrosion in the lead of the armored MV cables caused by saltwater in the subsoil. 3. The secondary MV/LV transforming substations are generally In good condion. The entire LV network Is extremely obsolete and subject to frequent and prolonged interruptions, due to both aging and high overloads. Lead corrosion was evident on both the MV and LV undegund netwrL Geneally, there is no coordination between the protection relays setn and the load caying capability of the LV cables, which worsens system operaions. The supports of the public lighting network, recendy repainted, show corrosion at their base. The underground network which feeds the lightg fixtures is faulted in many portions and is presently replaced by provisional overhead lines. The overall -82- ANNEX 2.6 Page 2 of 4 condition of the LV network and the public lighting system is such that it discouraged mainteAance aattlon by CELB. Actin ES= or under Consideration. 4. ENE is presently undertaking some retrofits and extensions to the distnbution network in the province. The supervision of these works is performed by ELECNOR S.A., a Spanish enterprise, almost entirely funded (US$ 18 million) by the Spanish FAD. The proposed work has several shortcomings, particularly since it involves the extension of the 30 kV level, rather than its elimination. The proposed 30 kV level is more expensive and more demanding in terms of procurement of materias. The Spanish project includes the construction of new 30 kV systems, which might be easily built at 20 kV. Moreover, it also involves the laying of 20 kV underground cables, continuing the mix of voltage levels. In fact the rehabilitation and upgrading program outlined in Chapter m is designed to freeze and eventually eliminate the 30 kV level. TABLE 1: Main network facilities in Lobito-Benguela DESCRIPTON OF FACILiT Primam 150 V and 60 kV network e 18 kln of 150 kV HV lines on steel towers *; e 60 kV HV lines on steel towen * Quileva substadon, 2x30 MVA 150/30 kV transformers * Caumbela substation, 5x4.S MVA 60/30 kV utformes * o Lobito substation, 2x7.S MVA 30/20 kV tanform * Benguela subsadon, 2x7.5 MVA 30/20 kV transfonnmers Secondary MV n" e 30 kV overhead lines o 20 kV undergound and ovebead lins * secondary MV/LV substations I.V netwvo* o about 600 kn of LV ovehead and underground lines * about 1,100 lighting points -83- ANNEX 2.6 Page 3 of 4 S. Work lUnderwa by LECNOR S.A. The project was planned by E?E under the spevion of the Spanh firm ELECNOR S.A. The project consists of the following: (a) construction of a new substation at Cavaco, 60/30 kV, 2xl5 MVA; (b) construction of a 150 kV line between the Biopio and Quileva substations, at a later stage; (c) construction of two 60 kV lines for the supply of the new Cavaco substation from the existing Catumbela substation, of which one is to be built at a later stage; (4) construction of a second 60 kV circuit between the Catumbela and the Biopio substations, to be Installed on the existing poles; (e) constuction of a 30 kV line between the Catumbela and Benguela substation; (f) constuction of a 30 kV double circuit line, on common poles, connecting the new Cavaco substafion with the Catumbela and Benguela substations; Og) various electrical work for retrofitting the Benguela substation; (=) replacement of five 30120 kV, 4.5 MVA transformers with two 60/30 kV, 7.5 MVA tansformers; (i) construction of 55 km of 20 kV underground lines In the towns of Benguela, Lobito and CAtumbela; ad OI) construction of 70 km of 30 kV overhead lines for supplying new secondary transformer substations in the Cavaco valley. 6. Cmments on the above work: (a) The works indicated in items (a-h) are mainly aimed at makdig the current 150/60/30 kV primary network more efficient and reliable, since all substaions could be closed in a ring configuration. The above works will also serve the purpose of meeting the expected load inre during the next decade. (b) Ihe proposed solution, however, which is to be implemented in the near fue, has some shortcomings which could be removed for a more cotrect and easier operation of the network as a whole. 84- 8ANNEX 2.6 Page 4 of 4 (c) In particular, the proJect Involves he extension of the 30 kV level, rather than forseeing ts eliminatiob. This voltage level is ill-suited, taking into account that the current MV dstbuton network is based on the following levels: X Loblto 20 kV * Beonguela 20 kV * Catur.bela 30 kV * Quileva 30 kV (d) The 30 kV level should be frozen and eventually eliminated, since it is more expensive and more demanding In terms of procurement of materials. (e) The project also envisaes a network layout with e constructon of double circuit lines. This system may cause major difficulties in case of repair work on one of the circuits, becase, for safety reasons, both circuits should be de-energized when repair is being done. (g) Item (i) involved laying of 20 kV underground cables. In the case of Catumbela, thes would be operated at 30 kV. This undoubtedly would shorten the life of these cables. . 85 . ANNEX 2.7 Page l of 4 1. The workforce distribonat ENE is shown In Table 1. Tbher a disproportlo' between the mber of worken (mosdy unskluled) and the mbte of senior and mil-levd technicians. : DISTRIBUTION OF THE WORK FORCE BY PROVINCE - ENE DDSCRWMN NO. OP WORS I ITCH. 1.LV ,TE NAT. MR. NAT. FOR. NAT. FOM _ WgmnQmA) 26S 8 U3 5 it 4 RAL (L4= Offin) 171 7 2 1 3 3 ILM A osacO) 23 1 3 O 1 I C Nah 114 2 2 1 7 0 Up 96 0 1 0 2 0 Maisog. 56 0 0 0 1 0 Z.1yco 1 0 I 0 T,uc Caw Kum* 34 10 0 6 4 4 _4WAmwvok 478 2 3 1 7 1 H_oAG 371 2 1 0 0 31 126 0 0 0 0 0 Kw"= SW 26 0 0 0 1 0 oladOffn 177 8 1 2 8 7 ouik 173 s 0 1 0 4 Nawbe 164 s 0 1 1 4 moxico 19 0 0 0 1 0 Look Nou I 0 I 0 LaoS . I 0 _0 0 T| _ 2296 50 26 11 49 28 Source: ENE, MP (now SEA) and mission flndinp. 2. Ihe maupower needs of ENE at headquarters are _u rkized in Table 2. The System Plaig Departm sbould cover the gene refurbishment and extesion of exist f"acilies ad pl_ani fx new faci . The plannig department ould also include the followig two ara: hydroloa d mattas. -86- ANNEX 2.7 Page 2 of 4 Tab~: ENE HIGH AND MID-LEVEL MANPOWER NEEDS _______1___ _ ,.'-...................... _________. , .m m iln__ ARM ELCMRCAL CIVIL MECHANICAL COMPUTER TarAL ENGIRS ENaNEERS ENGINEERS ENGINEBRS -pm _ 3 _ _ X 3 ____ ___ 7 1 2 1 11 StookMmnajmmt 2 1 1 4 and P_aou ___ _ _ _ _ _ _ _ _4 2 2 - yaPaning 3 . . 2 6 TOWa 19 3 5 4 32 3. Ihe nmber of seior and mid-level technicians at SONEFE are summaized In Table 3 and 4. Tabl 3: SENIOR TECHNICIANS - SONEFE NUMBER OF SENIOR SPECIALIZATION TECHNICIANS _________ _________ NATIONAL FOREIGN Enginer_in 17 7 LAW 2 - TOW 24 7 Souto: SOMEF and mii fndinap. 7 1ANNEX 2.7 Poag 3 of 4 MIg 4: MID-LEVEL TECHNICIANS - SONEFE MD-LEVEL TECHNICIANS MIDLE-VL TECLANS SPECIALZATION WITH DEGRBE WrTOUT DEGE NATIONAL FOREISN NATIONAL FOREIN T oahl 23 to i A dmhdsbi and 4 _ 11 Total 27 7 29 . Soo: SONEBE and msn findings. 4. The manpower ditbution at EDEL Is shown in Table S. Of the 936 employees, 56% are workers, mostly uvilled, and 38 % clerical staff. Senior level -taff (manaer and seior technicn) mab up only 4 % of the workforce. Igb1,c: MANPOWER DISTRIBUTION AT EDEL MANPOWIR COMPOSMON NUMBER OF EMPLOYEES Manes, 24 Hghb-lvd hniaso 14 Mid-lovd teohnicia 26 Wo*kes _19 Admistraio and sevioa 3S3 TOtal 936 Souo: EDBL ad mision findis. S. The manpower sduaton at CELB Is shown in Table 6. 8S% of the workforceare workers ad they ae mosoly unskilled. There ar only 10 senior staff and 7 mid-level techncians. The cmpany, nvertheu, manges to opert the system and barely keep up with repairs. Prevenive m Is ot patced. - 88- "ANNEX 2.7 Page 4 of 4 iaa6: MANPOWER COMPOSMTION AT CELB MANPOWER COMPOSMON NUMBER OP EMPLOYEES M 8gs 7 High-1.v.l tohlia 3 Mid-lvel taleuio 7 Wore 353 Cledeal perso , ,l 46 Total 416 .9- ANNEX 3.1 Pog 1 of 8 1. In order to provide additional detals for the railitaon and thncal assiac progra, the description of the proposed works and the estimated invesent costs and cah flows for each hydoelectic sation in the r ailadon program are pvided in this Annex. Cobe Re ailtaton f unit 3 and 4. of thei sbdubsatonad ancilar serice and reodlln of tAm 2. In order to me the power demand in the Northern System, it i esental o rehabiltate the powet staton as soon as possible. 3. abUl . To carry out the diagos of the curret stat of the plant and to define the rab acdons, SONEPE has asked for techncal istac from FURNAS CENTRAB ELtCRICAS. Based on the fiding of the mission, the rehabilitation project must iclude the folowing actions: a) aeTurbin o cleang and analysis of state of corrosion of the prmm tunnd steeli linng; * anaysis of the performance of anticorrosive prteto coating; o inspeton of the stae of the rotatg equipment includg the ditributor; runmner, beins, wbine retlaor, etc. (if) Geneor * check of the braking mechan; * lnsp&tion of the rator, , eciter and prtwei eupmet; * inspecti of the cooing system; * inspection of switches and a d oolol eqi.en 9go- ANNEX 3.1 Pag 2 of 8 Oil) Power staion dewatin and drange system * geeral overhaul of the dewaterlng and drainage system and replacement of the corroded pipes; * overhaul of the levelling equipment; * overhal of the pump electric control board and cabling; * refurbishment of the pumps. (lv) Diect curret ancillary services o total replacement of the 110 V battery wIth 52 elements; * insIlation of a second rectifying unit to Improve system availability; e overhaul of the synem separating the essential services from the non-essential ones; 3 replacement of the 14 element 48 V battery. (v) Emergency diesel unit * overhaul of the 600 kVA emergency diesel UDit equipped with an 800 HP Diesel engine. (vi) 220 kV substaion o replacement of nine 220 kV, 1,600 A circuit breakers; soverhaul of the lighting-arrester columns and checking of general condition of the grounding system; * general Improvement of the power transformers and ovedraul of the corresponding control and protecion systems. (vii) Control and monitoring system o replacement of some control and monitoring equipment, of oudated technology and alrady out of use; o automation and overal of the power station control and supervisory system from the control room; * Installtion of a chronological event recorder and of a fault sipgling device; * overa of the measuring and logging sysms. - 91 - ANNBX 3.1 Page 3 of 8 (Vii) Millaneous * cleaning and re4lghtening of the main busbar; * rehabilitation of the ventilaion system; * redesign of the lighdng systm; * overl of th elevator; o overhal of the electric control systems of the hydromechaal deces (jate). 4. . The following aumptons have been made: (a) 3 units should always be available for operation. Tbus the execution of the r'ailbtation works proposed is only possible once unit 2 is rehabilitated. (b) a minimum period of 3 mohs to place the order, manucture, dispatch and trasport to the it the nessary equipment; (c) duaton of rehabilion action per unit: 7 months; (d) period of acceptance tes: 1 month. SONEE epects to xtend the techical asistance that it Is presently reiving from FURNAS CENTRAIS ElTRICAS to the following fields of activity, wihin a plan and financing already established: (a) rarton of bidding docments, both technical and cmmeci (b) cllaboadon In the bid eauation process. SC3NEFE Anrher epcts to call for tenders from the following specialized firms and joint ventur: (a) ABB Sueca (b) ABB Service (c) SEPSAICOMETNA (d) MER1-G9l. S. . Techical support I aleady assed for the coact award pbase. To gar8ate the success of the rehabiitation program proposed, techni assistan for about 70 man- monts I required for conta magment and projec supervision: -92- ANNEX 3.1 Page 4 of 8 1 senior engineer 1 mechanical or electrical engineer 1 electromechanical technical assistant 6. The estimated cost for the rehabilitation of Units 3 and 4, are given In Table 1. Ihe foreign component of the first two items b assumed to be 85 %. Iae 1: CAMBAMBE - COST FOR REEIABILfTATION OF UNfIS 3 AND 4 AND SUBSTATION OVERHAUL. (1990 US$ 000) I4VESTMENT IN THE POWERHOUSE LABOR FORCE EQUIPMENT TOTAL Rehabila*I onfUnt 3 and 4 1,0 1,920 3,200 Control room and substaion 710 2,220 3,000 Tachnical a mn fr project msnagenat 800 ad supwvu (75 an4nonhs)_ Subtotal 1,990 4,140,000 7,000 Phycal onq 1,30 TOTAL 8,300 7. For the US$ 3.2 mIlliodestmated for the overhaul of units 3 and 4, a ababiltom with the composidon given below was aumed. Some of the workforce may be available in Angola. * 1 cotucdon dte manaer (nginer) 0 2 forme * 4 mechnica ftters o 2 welders o 3 coil wnders o 2 ldetricians o ancillary peson (clerk, driver) 8. TecIcal asis of about 50 man-mouths wih an strated cost of US$ 800,000 Is uired for all activies rdated to the contrct awartd pha and for project managm nt d suandvI L .93- ANNEX 3.1 Page 5 of 8 Main 9. The foUowing rehabilitation and technical assistance actions are proposed: (a) M:dgg m : These activities also apply to Lomaum and Bloplo and ar extremely Important. ENE is considering a proposal from Electricidade de PortuEDP fr the global management of the safety control of the stuctures that itege the Bloplo, Lomaum and Mata plants including erction and maintece of the moioring system for a period of five yea. It also includes taining activities In monitori systems; (b) ehabgkigiain of the s9ilwa Not and reakr of the dam pilas The techucal management of this work is within EDP's scope of work as described in actions In progres given in Chapter 2. The aim is to reestablish the operating conditions of aU the spillway gates, by elimnatng the compression exerted by the pillars on the gtes, and to immobilize the dam pillars In their current position, by resorig to the application of anchor judiciously placed at the half-walls and hall-pillars to hinder their rdative movement; (c) B=i _ofAg of f \= moutle: Tbree gate are jammed and one is broken Mm r%ar work must guaran that If the gt or gtes ae oped, it would be posible to coset em safly. This gu ecn only be glven wlth the emptl of the mservoir to the level of the bottom outlet edge. Moreover, to guarantee, h fg to mantenan of the gatoe without rsorting tO OMptying the roir, an additional deck must be conuctd which opeates as a cofferdam and the maufctand erecdon of gov placed about the Inlet to ech opening. Tbis device would permi, at any ime, to drain the opeing and to mak access to the gates possible. his work duld be ntegrad In the bid specifications for rehabilitation of the spillway gas In (b) above; (d) uaL olmmu1: Repair work prsnty underway does not include therarblshmen of the O 1kV block of dl8ht els as well as the nof th on eupme. Replacement of this equipmet is eq d SIce it s no longe ma d; (e) _ _ig b Rehabilitaton of agn 150 kV euipme sinc i no or ied. Expasion work alm at feing the ibongion by a 30 kV iHne and it coiss of the erecton of afomers and _ n d cntrl equient; and. (f) 1 _ : For the works ment In (b) and (c) above. Tech l as ce for the rbilion works In (d) and (e) might appoprtel -y be iluded in the EDP contrct by an extension of the contract, considering to smal amoun of work ivved. .94- ANNEX 3.1 paoe 6 Of 8 10. _ f. The total cost i wlmated at US$ 5.04 million and broken down as shown in Table 2. Mebh2: MATALA - COST ESTIMATES FOR REHABILIATION OF SPILLWAY GATES. (1990 US$ 000) ITEM COSTS ESIMTES Poreign LOWa_ ToWal Labot 980 420 1,400 Equipment 570 30 600 New deck 1,045 55 1,100 Materials 600 200 800 And-corrosive teatmet 285 1S 300 Subtal 3,480 720 4,200 Physica contingency 69 144 80 Total 4,176 864 5,040 i1. Cost estimates for rehabilitation of the bottom ouet at. Table 3 pwvides a cost summary. Ite total cost is estimated at US$ 0.98 million. Iak 3: MATALA - COST ESTIMATES FOR REHABILITATION OF BOTTOM OUTLET GATES. (1990 USS 000) nTEM COrn ESTIMATES Foreign Local Total Labor 175 75 250 Equipment 142.5 7.5 150 Now control dvie 76 4 80 Now decs and fixed puts 104.5 5.5 110 Matotials 120 40 160 Aeni lvttm ent 66.5 3.5 70 Subtotal 645 141 820 Physical contingecy 136.9 282 164 Total 821.4 169.2 9g4 -95 ANNEX 3.1 Page 7 of 8 12. Cos estim ft the m bilizatioa of the dam's pillars. The total cost is estimatd at US$ 2.06 million as shown In Table 4. IakA 4: MATALA - COST ESTIMATES FOR IMMOBIUZATION OF THE DAM'S PILLARS. (1990 US$ 000) rrem COSTS ESTMATES Poig LoA ToWal LAbot 679 291 970 EquIren 76 4 80 Madetials 5o2,500 33,S00 670 Subtotl 1,257,500 328,SO0 1,720 Phya contIngecy 251,500 64,700 344 TOW 1,09 394,200 2,064 13. For the proposed works it has been assumed that the area is fully secured as well as the road to Huambo. The actions are divided in four stages, namely: (*a) 1sttagl : 'he following is urgently needed: (i) excavation of the loose fillig of the embanment, ( ii) Teplacement of the filling and the protecting rockfall, and (ii) nsolidation of the foundation with cement injections. This activity iS expected to be cared out by the Miistry of Consruction; (b) 2nd a: To be carWedout immediately Afvards. The works to be executed are: (i) completion of the cement injections through the galery and the waterprotection wall, (i) reconstrucion of the reinforced concrete structure at the inlet of the half-botom discharge, (ii) complete repair of the gates' ontrol mechanisms of the bottom and half- bottom discharges, and Ov) ientation for dam observation; (c) : Overall repair of the dam's downstream face which is showing a deep and abnomal undulation of its protectng rockfall; (d) 4 : n Repair of the erosion detected downsteam of the energy dissipation pool of the bottom and half-bottom disbcharges as well as of the dam's left bank access road. ANNEX 3.1 Page 8 of 8 14. The cost estimates for the activities to be carried out in the 2nd stage are included in the Project. For the remaining works it is not possible to give a forecast of the cost estimates. The expected cost for the rehabilitation and technical assistance (for bid preparation and evaluation, contract management, project management and supervision) Is US$ 8 million Including about 170 man-months of technical assistance totalling US$ 2 million. The cash flow for investments at Gove is given in Table S. The foreign and local cost breakdown for the rehabilitation of the dam has been estimated at 85 % and 1S % respectively. Iabh:: GOVE - CASH FLOW OF INVESTMENTS. (1990 US$ million including physical contingency) DB UCRIMION OF WORKS INVESIT | 1992 1993_ _1994 6.00 1.71 2.57 1.72 o oompletdon of the gtoutdng tirough the watr ptctionwal ° reconuction of theefod concret uctur of Inlet of tho half-bottom outlet * complete overhul of the control devic of the bottom and hafbotom oudet gatS * consolidaton of the dam foundaton In the areas bfW y a_oWe ° _ n of the dam monioring system 1 A_ _ _ _ __ 2.00 2.00 Total 8.00 3.71 257 1.72 .97- ANNEX 3.2 Page I of 2 TEXW& LOAD G-RQWTH AND-INC-REASE IN NUMBER OF =OSUMERS Luanda Province in the Period 19I2QM 1. Table 1 provides a summary of the expected increase in the number of consumers during the periods 1991-1995 and 1996-2000. The peak demand in 2000 is expected to reach 302 MW. In the period 1991-1995, the average demand growth rate in Luanda i8 expected to be 9 % and in the period 1996-2000 to reach 10 %. lhis demand growth rate is in line with that assumed in the leat cost development plan for the Northern System. In the period 1991-1995 the number of new consumer Is apected to increase by 60,000, thus bringing the total to 130,000. The load increase in the period is expected to be 21 MVA (16 MW at 0.75 power factor) in the urban area of Luanda and to ncrease by 60 MVA (45 MW at 0.75 power factor) in the suburban area. 'Te total increase is, therefre, expcted to be 81 MVA (61 MW), bringing the total demand to about 185 MW at the end of 1995. biWe 1: LUANDA PROVINCE - EXPECTED INCREASE IN NUMBER OF CONSUMERS AND LOAD GROWTH IN THE PERIOD 1991-2000. DESCRIPTION First Period Second Period 1991-199S 1996-2000 Rise in number of consjmer 60,000 76,000 -ad nocreas- * urban area 21 MVA (16 MW) 37 MVA (28 MW) -. o suburban area 60 MVA (45 MW) 120 MVA (90 MW) |Todal load increalso. - 81 MV (61 MW) 157 MVA (118 MW) Peak dmand (13 MW in 1990) 18S MW (1995) 302 MW (2000) Lobto-Benuuela in the Period 1991-2000 2. Table 2 gives a summary of the expected increase in the number of customers and demand for two five-year periods. In the five-year period 1991-1995 demand is epd to icra by 22 MVA (18 MW at 0.8 power factor) and reach 46 MVA (37 MW) by 1995. In the subsequat five- year period, demand I epected to increase by 32 MVA to reach 78 MVA (62 MW at 0.8 power actor) by the year 200. This forecast is fiaught with uncertnty since it is very difficet to predict th increase in demnd due to thecurmet (une 1991) represed demand as wel as the numb of llegal consumers. -98 - ANNM 3.2 PagP 2 of 2 Table: LOBITO-BENGUELA - EXPECTED INCREASE IN M.UMBERS OF CONSUMRS AND LOAD GROWTH IN THE PERIODi 1991-2000. DISCRIPTION Period Period 19l-l1s 1996-2000 Ris in number of consumers About 32,000 for 191-2000 Load inoea 22 MVA (18 MW) 32 MVA 16 MW) Pak demnd (19 MW in 1990) 37 MW 62 MW , 99 ANNEX 3.3 Page 1 of 4 SYSTEM EI pX lANC AMI PRIORI YN1ASUIS FOR EEEICI=N OPERATION 1. Ihe electiicity distributed throughout the province of Luanda is almost entirely generated by Cmbanbe and transmitted by two 220 kV lines which feed the Luanda and Viana substations. IThe Luanda substation is fitted with 4x60 MVA transformers: three 220/60/15 kV and one 220/60 kV. In 1989, the peak demand was 160 MVA (120 MW at 0.75 power factor), 125 MVA of which were ditributed by EDEL and 35 MVA by SONEFE. Ite Luanda substation thus has ample capacity to cover the peak load In Luanda, with a reserve capacity margin of as much as 100 MVA. zfV (a llvNo 2. EDEL consumer demand in the urban center of Luanda is met by the Cuca and Maianga sustations which are linked to the Luanda substation via a double circuit line (Luanda - Cuca) with 409 sq.mm steel reinforced aluminum cables (ACSR) anLt three underground lines (Cuca - Malanga) with 05 sq. mm copper conductors. At full load, the Luanda-Cuca double circuit line is used at 94 % of Its hrmal rati. Thus, a potential fault on one circuit, necessitates the reduction of the line loading. Tbis siuaon is even wome when to repair a faut on one of the two circuits, the entire double circuit line i put out of service becase of safety reasons. Thbis may interrupt the supply of electricity to the entire urban area since no backup supply is planned. Iherefore, to make the operation of the substations more tional and efficient, it is necesy to InstIl two singlecircuit lines with 409 sq.mm ACSR cable. This measure will lo enable demand increase up to 1995 to be met and to substamtially cut down on system Im. 3. Regarding the 60/15 kV substations, another 60 kV injection point with a 60/15 kV tansrmer must be considered, in order to improve system reliability and meet the demand increase. Ike pferable injection point would be at the Mutamba district and supplied by the 60 kV Cuca ubstation via two undergrud circuits with 3x(1x300 sq.mm) conductors with exuded insulation. The 60 kV overhead lines, entirely operated by SONEFE, are rather obsolete, but generaly in acceptable conditio 11. v/ Pr a rher complt rhabiltton of those lines, the wn min coretive miotac jobs should be o rpshUlng of an0 se wt * 01Xn of mm twendris bb. l ° t_tUMOf some ,MM -100- ANNEX 3.3 Page 2 of 4 Secodar 15 kVNewk 4. U rba ter. All consumers in the urban center of Luanda, are fed by the 15 kV lines *om the Cuca and Malan substations. These substations are linked via some primary MV feeders in beted mass-Imprented, threepole underground cable with 185 sq.mm copper conducto. The sndary 1S kV network is mostly of underground cables with 70 sq.mm copper conductors. Genrally, the perfrmance of such cables is rather good, since they appear to have never been overloaded. Theefore, they may be kept in service for at least another decade. The siuation is rather differe In terms of the ectrc oaton of the systems. In the present circumstances, in case of total outage of th Malanga substeaon, its load should be met by the Cuca substation overloading the Cuca sormers. However, ths action Is not possible as the substation outgoing feeders cannot cafry the entire load because of Insufficient cross-section of the conductors. The same applies to possible outages at the Cuca substaion. Due to isufficIent transformer power rating and limited transmission capacity of the feeders, the Malanga substation would ot be capable of serving as a duplicate or redundat supply for the MV networt. The above drawbacks can be overcome with the construction of the new Mutmba subsation ad the lying of short length of 15 kV undergroudd cable, which would allow an enhanced orion of the prest link between the various switching substations. Almost all the secondary MVILV sformer substations are generally in bad condition due to lack of maintenance, especialy the LV eqpipment Mn Ce of the MV/LV substations has been totally ignored. This accelrated the *oration of the swtcW an the substation as a whole, decreasing reliability and makin then unsafe for repair crews. The substations are prone to frequent outages which disconnect a large number of consumers for rathe long periods of time. As a result, it is deemed neceswy to totally reconstruc 110 seconday taformer substaions and to replace the swltchgear in another 90 substations ?J. 3. Suuran US. The 15 kV lines, through which SONEFE supplies industrial consumers in the suburban area of Luanda, are all radially operated from the Luand substadon Y. This network iuraioauses significant supply problems to industrial consumers. As no bakup supply Is in place, these consumers ar disconnected when an outage occurs. The problem lies in the configration ad operaton of the preset network which does not opdmize the use of the network for the following reasso: () duplication of lines operaed by EDEL, with consequent redundant investmen, (U) neglect 2/ Thmaval povidedt EDBL complet is cren wor to connet te fome 6.6kV si*Wans to do5kV MM a 1/ At th prebnt, tho sbubban consmers arm suppe via: * SAIDA 1 outgng lin, fiom the Luanda 2 substadon, feedn consum0 in th Southeastm, wihu duplca sWply, o SAIDA 2 outoing li fom th Luanda2 suton, fedig consuen the Won uea, whout dupliat, supply, * SAIDA 3 outphg lino from dt Luad subtn, oedi t industrial conums of dh un cener, whout dupliat supply, * MIDA 5 outging hie from the Luada 2 subsan, foen cosme to the Badh Withut dupcatsupp. -101- ANNEX 3.3 Page 3 of 4 of the possibility of closing links In the network, which would facilitate both the eliminaion of some radally operated lines and insure duplicate supply of some network lines. Entrusting he opeaton of the entire MV network to a single utlity (i.e. EDEL) would help the above problems 41. The MV ovahead lines, currendy operated by SONEFE, have performed well. Almost all the MV power supply substations genlly have a bad performance record due to lack of maintenance. Ihe swltchgear needs to be replaced in at les 300 of the MV grid substations. LY Network nd Pbic Lighting 6. Ihe enire LV network Is obsolete and prone to frequent and prolonged faults, due to aging of parts and components as well as high overload on some cables. Generaly, ther Is no coordination between proton equipment and load carrying capability of the LV "ables. This obviously impairs network opeion. Most of the distribution housings or cubicles located un feeders are installed along the roads and do xOt have protection doors. Overall, they are all 1-maintaIned. Tho precarous condition of the network ailowed numerous illegal connectons which worens the e owiomic and financial situaton of EDEL SI. 7. The public lighting system is pardy in dipair particularly In peripheral roads and green spaces. ith underground network feeding the lighting points i faulted in many places and replaced by temporary overhead lines. In addition, lighting fittings and fixtures are obsolete and in poor condition. Tesre are reatively large voltae fluctuons in the LV network which diminish the life expectacy of light bulbs. Ihe ovel state of the LV network discourages any corrective maitennce since it would be very cosdy ad iffctive and this is compounded by the fact that there is a lack of equlpment especially stree lightig vehicles. S. To redress these system deficiencies and at the same time to meet the growth in demand in the next few years, it is necessary to reconstruct and increase the transmission capacity of about 600 km of LV undergd lines and about 250 km of LV overhead lines. Moeover, at leat 30,00 consumer connections, prenty in a very bad state of disepair, must be totally recotructed. The 30,000 ilegal connections should be Idendfied ad laized through the constrction of stndard M9, tanng the netwok to EDEL, the outined problems may be eliminated by tho following a _npt * SAMA 1 t of then by inrogthondutoreou- onandtem hlne as fir as the Thomn substtion wbere a 6015 kV tanbumner sd be hnaed, o SMDA 2 eon of pat of the SAIDA 2 Ine by binaing dte conductor c_I ar and by eatn t li Un as for " tbo subdtion, * SAEDA 3 ln thds line with the Cuoc sutaio to se dupHto sply, * SADA S recons_uton of the line by neag tho condutor aes lonal am and by extedg the line as far the Quofngondo ssaton, whoe a 60115 kV trfnaw shod be isld. EDIL eU estm th nmber of Illeg apgs at p=kuty 30,000. -102- ANNEX 3.3 Page 4 of 4 consumer supply terminals. Additionally, 1,000 nw lighting points with adequate ihting fte sould be constucwd to rplaces the exsting otes. The present 600 km undergound lines may be reconuced patldy udlegrund, party ovethead, in order to reduce csts. -103 - ANNEX 3.4 Page I of 3 RVdAfflLfAT=O AND GROwPN= W= IN LUIAMA 1. Tables 1, 2, 3 and 4 provide a summary of cost esdmae for the HV, MV ad LV ntworks r the dribudon system of Luada. Cos are Installed cot, that Is, they include equipment and matdals, asport and labor. Most of the HV and MV project hav already been picd-up by other donors. Tb It: REHABILITATION WORKS FOR THE PERIOD (1992.199s), PRIMARY HV SYSTEM IN LUANDA (1990 US$ Includes equipment and materials, labor and taport) DESCUPIB)IN OP REIHA ATION WORK8 uNIr 1 STMAD corn _cor smOus s AI.1 LAab m&iat - coawttooo of U. boys fwr w to Cuea Audulo 330,000 330,000 ° '^360 kV ln bays 1~ ~~ bof j "0 * b s a _ _ _ _ _ _ _ _ _ _ _ _ A1.2 Cu.. aaotlos - *ou*cagelo of fOm feeer betee Cu..4m&nd Oad Cae. 600,000 600,00 * 4xG0 kV lIlo boy * Ibu_ __ __ _ AI.3. Maas% sbe - ootlm . of a w WbalsequWpedp as foow 3,0000000 3,000,000 e 2z60 kV Om bays fr lw f1mn Cuca mbatto * lx60kVbusba e * 160 kV asn er bay * 1 tookodo and ca unit for 13 MV Ius * 2260/15 kV hm pbs ansfotmer, 120 MVA + lx4OMVA 0 _ '6" wbw SWdvbW A1A4 Viam _abeW - c_nokuWm of a amew 6/IS kV uatlo oooft 1,000,000 2,000,000 o lxsO kbuae + e Ix60 kV _rafme bay 1,000,000 ° I mawitg and contl u for te MV 1e (for de two * 12/W301kV 10 MVA th pse ansme ow ° 1160WIS bIV 10 MVA three pbhas trnsfom ansom) * I g1 HV moolto doaonrolunlt A1.5 Quibondoubgslo.- ooauu= of a am 60/30 V, 10 MVA a W60115 , 5,000 5,000,000 7.5 MVA b _ :o.ose1udh. C 120kV buda o MfOkV anO orw bay * 126130k V 10 MVA dum phase * 126/15tV 75 MVA he pas utsome * I RVse_Nonlada ooizlun ml * Nmalng God me rd_ _ Al.ff abdo. - C*nMWe_ ta sew ubatatla 2,00,00 2,000,000 -104- ANNEX 3.4 Page 2 of 3 DESCRiPTION OP RAULTATION WORKS uNTT ESTUEATE 1 cornos AL? ConaWon of 60 V dobl ciruit OHL an ie towers 409 sq.mm ACSR 0,000 560,000 dors, fora toal of 7 hm, to doubb Ut lad caing capbity of d. link betweento Im'akd and Cue. substations_ Al. Ce_,othlo f0 of uneskV _ r,Und tis, Sx(1,30 q.mm copper conducto, 230,000 2,760,000 to &d th new Muamba subaon, fore: ,o 12 km Me ~2: RHMABILIATION WORKS FOR THE PERIOD (1992-1995), SECONDARY MV SYSTEM, LUANDA. (1990 US$ includes eq,uipment and materials, labor and transport) DECRiP N OP REHABILItATION WORKS UN1T ESTIMATED corn- cs A2.1 Constuton of 27 ha of a 15 kV OHL from the Vi station on 58,000 1566,00 reinforced cmonrit, support, wit op and pin instos , 150 sq.mm conduto, to rlac the edtg SAIDA Iln. l._ _ A2.2 Conruco of 20 km of a 15 kV OHL from te Qulfagondo suhb on 58,000 1,160,000 on _einfoe conot suppots, with cap and pin insuators, 150 sq.mm ACSR coduto , to replace the exiding SAIDA 5 lIne. A2r Conucto of 16 km ofe 15 kV OHL from the Bdos ation on 58,000 928,000 reinoced conarte upport, with eap and pin inuat, 150 sq.mm ACSR conduo, to repe the eoistin SAIDA 2 tin. . A2A R_eoucdon of I 10 extig seconday tsforming sbsdonrs witb 20,000 2,200,000 aon of pow factor corecton cacio. A2J Manean nd iawbWsmn of _swthgr in about500 SWaing 10,000 5,000,000 secondar MV/LV asforming subtlons with bisltion of power facbtor c op -. ____o_ 5W0 MV aes ta SONE for 8NduEti consue with curat (CT) S0 400,000 IabI 3 RE]HABILITATION WORKS FOR THE PERIOD (1992-1995) LV SYSTEM, LUANDA. (1990 US$ INCLUDES EQUIPMENT AND MATMRWALS LABOR AND TRANSPOR'I) DESCR ION OP REIA8ITION WORKS UN1T ESTIMATED .. COSS O ASA1 Constution400 haof utdeoud lnes on 3x95 aq.mm and a65000 39,000,00 3SA aqtm coppor conducO to toCplaC the aestig Oblte _ . . . -105 - ANNEX 3.4 Pogp 3 of 3 DESCRUPnON OF REHABILITATION WORKS UNIT ESTIMATED COSrTS cos A3.2 Construction of 250 ktn of LV OHL on roinforced concret poles 28,000 7,000,0o0 and wall bracs with 4x70 sq.mm and 4x35 asq.m overhoad inatd twsted a"b, to repace th estigobsolote uwo*. . A3.3 Consuctin of 60,000 oonsum uply connections to dimint lle oonnocto and reconructon of existing supply trinals o 30,000 unite with metes 320 9,000,000 * 30,000unIwthoutmeter 220 6,600,00 A3.4 Revamphi of the aisting public lightn ysem with undeound 420 420,000 cabls for 1,000 lgi p . __p -106- ANNEX 3.5 Page 1 of 2 DlSlMMUMUSTMM DE lOMIELA PROYERC IYA= E3RMANCE3 AND PRIQRrrY MEASURES FOR EFFICIEINT MPBM=N 1. The provinc is supplied dthougb 150 kV and 60 kV lines from the thermal and hydro plant at Blopio and the carrae-mounted diesel plant at Lobito. Ite system consists of the 150 kV and 60 kV primary networks, the secondary MV network and the secondary LV and public lighting syms. 2. The 150 kV overhead line linking the Bioplo-thermal substation with the Quileva substtion is in good condidon and, in principle, does not need corrective maitnance. jimary 60 kV Networ 3. The 60 kV overhead line linking the Bioplo and the Caubela substaions is rather old but generaly in good condition 11. The line was designed to accommodate a second circuit. The rcety erected Lobito and Quileva substations are in reasonably good condition and do not require corrective mainance. The MV bays of the Cambela and Benguela substations need some immedia corretive maintenane work. ec=do ) a* 4. Ihe network operation is quite cumbersome becmse of the presence of the two voltage levels: 20 and 30 kV. In effect, while Baia Farta and Catumbela have a single 30 kV voltage leel, Lobito and Beguela have two levels: 20 kV and 30 MV. At present, a fault on the single 30 kV line conmeting the Catumbea and Beogua substaons would Interrupt service tc the small towns nf Beaguela and Baia Fart. Guenally, the pefrmae of the overhead MV networK, both at 20 kV and 30 kV, is good. Conversely, the undegound network is in very poor condition, with frequent ouges. lhe cause of these disruptions is the result of corrosion in the lead of the armored MV cables caus by saltwater in the sbsoil. Ihe sedary MV/LV transforming substations are generlly in good conditio. The LV connections and bays, however, do not comply with injury prevendon stm_anb. ,: am nee th IllOwIn conurv acion: o r 8alim of au std towers, * _costvetion of sm foundaio blocks, O uphmut of some ts. - 107 - ANNEX 3.5 Page 2 of 2 LV Netwk and Pbic Ll9t S. Me entire LV network is extremely obsolete and subject to frequent and prolonged Intruptions, due to both aging and high overloads. Lead corrosion was also evident on the LV underground network. Generally, there is no coordination betwee system proteion and the load carying capability of the LV cables, which worsens system operation. The pole supports of the public lightin network, recently repainted, showed corrosion at their base 2/. The underground network Is fwated in many portions and is presently replaced by provisional overhead lines. The oveall condton of the LV network and the public lighting system is such that it discourages manenace action. This always proves to be cosdy and indffective in the long run. To oout_a th cortosion pblem, ClU pbn to plc a da at ho bas of tho support. Tbh, bowam, woul be a vey tm coming opeaion and would prto Inadequa hep. -108 ANNEX 3.6 PagM Iof 3 EFOR LORMANMEN,A 1. Tables 1, 2,3 and 4 provide a summary of the costs esmates for the HV, MV and LV networks for the dibution system of Lobito-Benguela. Costs Istalled cost. Foreig labor cost has ben nreased by 25 % to account for travelling expes. IabI1: SUMMARY OF REHABILTATION WORKS FOR THE PERIOD 1992-199I PRIMARY HV, SECONDARY MV AND LV AND PUBLIC LIGHTING SYSTEMS FOR LOBITO AND BENGUELA. (1990 US$ includes equipment and materials, labor and taport) DESCRIPTION OF WORKS UNIT BSTM&TED coni COIN A1.1 Dplo ubion - eWtlion of th sbtai wih 1,830,000 1,0,000 Inlation Of. -* lxO kV lin bay * 1 tansome by * 1 1V protcon motong nd contol qup - lxlSJ6O1kV 30MVAasform, . Al,2 Caaoo susato- consucti of a m 60/20 kV 2,000,000 2,000,0 bstao equippad wi: ° 2~ik i D ne bay * Ix60 kV bsb * ltrmnI afb. bay ° 1 HV monitoring and ontrol equip_mt o 2x60/20kV 20MVA thphmt omn * 1 protcto moanorin ad ool unit for wvem MV li * 1 brAc eadoano and clvi wois_________ AIJ Caumoba sustation- rtrfit of the subsam with 1,000,000 1,0001000 Intaion .f * ix0 kV ln bay e 1 XIV peot on mosoin_ g and cont Op*nt 0 2x602 IV 10 MVA nfomu * 1 potn moloriS and contro equipmnt foe fiwo UV line A1_ Consuci of a S0kV SI ciruk OHL on se tow_s, 67,AOM 20- ap and pin Iuato, 261 sq.mm AC8R cooducto, for a toa lenof 40 kI, linkingth Dioplo subto wih thie AI Cotriom of a 60 kV dgeircuik OHL on ded toum, 40,a00m 1,410,00 cap end pin inlato, SO sq.mm ACSR oduct, for a total laph of 23J km. lnk:ing the Cavao ubt wh the Catumbul substatin -109- ANNEX 3.6 Page 2 of 3 Tible 2: REHABILlTATION WORKS FOR THE PERIOD 1992-1995 SECONDARY MV NETWORK, LOBITO-BENGUELA. (1990 US$ includes equipment and materials, labor and transport) DBSCR1TON OF WORX UNrr .sTmAT. COSTS corn A2.1 Replacanent of 55 km of 20 kV underground cable with EW - 100,000/km 55000 nslated 50 sq.m* coppe cabla. A2.2 Contucion of a 20 kV OHL on rainforcod concr towers, 54,0001km 54,000 with cap and pin Insulators, 92.12 sq.mm ACSR conductors, for a total longth of 1 km, to link the cwrrnt CatUnbM a- DBeuela fli with the new Cavaco substation. A2.3 Constructio of 3x20 kV underground line, 3xlxlSO sq.minn 270,000/km 405,000 copper conductors, for a totl length of 1.5 km, to connect the nw Cavaco ubsation wih the BDnguelsststlon, to be downgaded to a dmple switching sbtadtion. A2.4 Constructio of a 20 kV single-cicuk OHL with reinforced 58,000/m 577,000 concte towers, cap end pin insltors, 1S0 sq.mm ACSR conductrs, for a total length of 6.5 km, to create a new link betwee the Catunbea and Lobito subations. A2.5 Constucio of a 20 kV OHL on reinrced oncrete poles, 54,000fkn 108,000 with cap and pin insulators, 92.12 sq.mm ACSR conducts, for a tot of 2 km, to conectthe curet Benguola saFaPta line with the new Cava,o sbstation. -110- ANNEX 3.6 Page 3 of 3 Tiblo3: REJHABILITATION WORKS FOR THE PERIOD 1992-1995 LV NETWORK, LOBITO-BENGUELA. (1990 USS includes equipment and materials, labor and transport) DESCRIPIION OF WORKS 1 UNIT ESTIMATD COSTS COSTS 1990us$ 1990 us $ A3.1 Reconem on of 400 km of LV overhead cable In the towns 28,000/kan 11,200,000 of Lbto and lkaguda to race proee obsolete uerrndnetwork. _______ A3.2 Contucmon of 18,000 consumer sotvio drps connetions with nms to dlImiate illegal connections ° 5,000 unltewith mee 320 1,600,000 o 13,000 units without mwe 220 2,860,000 A3.3 RPcorucio of exisg public lighting sysms for 1,000 420 420,000 lIghi points. A3.4 eplacemANt of 120 MV/LV transformers of various power 5,400 648,000 atingo to chane voltgo from 30/038 kV to 20/0.38 kV. A3.5 Refrbishmet of LV bays for 100 secondary MV/LV 1,600 160,000 trnfomn subsat,n -ill- ANNE( 3.7 Page 1 of 3 SIM== MVMM- Mg? MANPO)WER =WNIN AND ESMA4TED OM= DISTRIBUTION SY=IM. Cours for Hi-vel Tchnicias 1. High-level technicians in electric utlities in Angola have generally a good techical education; however, they lack specific practical experience. Practical training would provide the basics of labor organization within workers, management, economics, environment aspects, and enforcement of techical and injury prevention standards. Formal technical training would involve courses and workshops to discuss and improve their knowledge on technical and regulatory and organizational aspecs. All of the 45 high-level technicians should receive the trainig proposed. 2. One problem in setting up any training for high-level technicians Is the fact that only a few of them at a time can be absent from their jobs for more than 2-3 weeks. The Task Force for the project would coordinate manpower training actions and select the most suitable depending on acal condtons and logistical problems encountered at each utility. The options hat can be offered ae: (a) Courses of 2 weeks duration for not more than 5 participants; and (b) On-the-job training in electric utilities in a foreign country (EDP - Portugal) for a period of one month for about 3-5 high-level technicians at a time. Trainees must finh the 2-3 cours in different subjects before going for on-the-job tining. Cm ofW2 lCeclScians 3. Mid-level tehicians have a rather poor formal technical education and practical exeience. Thus, all of the 46 mid-level technicians should receive practical trning. Courses are propose so that mid-level technicians would acquire experience by performing typical distribution tasks. It is envisged tha durn a first sae of instruction lating for about 2 weeks, mid-level tecnia would be introduced to specific knowledge of the distibution system. During a second stage, the technician would join the workers for a 1 - 4 week course on practical training as deemed apoprit. The trasng will be complemented with a set of meengs with lnstructors lasting for about 2 - 3 hours which would take place at the end of each training week in order to gaup progress. 4. About 350 trainees will be train3d in this 30 month effort. To achieve good resuts, the number of participants In each 8 week course will be limited to 20. Consequently, 18 tining courses ae reqired with each course conistg of the following 3 stages: F ¢* 9 4~~~~~ - l * i {l |1li ia I X 1} ' Q W | 1{i,~~~~~~I I a u , ., , , > W~~~~~~~~ -113 - ANNEX 3.7 Page 3 of 3 (b) lAbto (I) courms for mid-level technicians and workers from CELB and from ENE for the Lubango, Namibe and Huambo locations. .114* ANNBX 3.8 poa 1 of 1. At EDIL, the O&M depatmt conoi of S group wh e followin nrsoue: (a) __, ,, 1 Imu head * 1 ofbzadvehile * 1 hamedmaWNevel techniian * 23 workers and * 1 offrom vowc) * iliad * 23 workers and * 1 Off-fow Vehicle (d) * 6 lnterniedla*vel hotechnIcIs * 138 work and =3 1 of-road vehil * 1 head * 1 Lntsdietlate.l enanm 3125 wo1k| and * G4orer 2 off-road vehiclesan o1 head * lore64 stk 0 1 of-m vah0 an 2. The network disptchin group handls network dispatcing and change to dhe network co A ~ caused by6ftoulaonteprimary, andpgniator bilures. Us aoatr ru carries out tq*o o,fs mod gbasmo ooo sawa a wdl_ a eoXSwed network. The gbs oup Is In charg of consmuction, opeatin sad mab teof .11 seondary swtddt _1ad radbrsforminThe network gru nepak dbt on do LV ntwok as wel i dsig ad delp min etensiod now connetdous. h de of most of t oup s por depinpaly totelackofskild workesad ofsitale parepusandI -115- ANMEX 3.9 Pago I of 2 Technical assistance by foreign experts, of 15 ma-months at US$S15,000 per man-month, would consist of following: * unification of the EDEL and SONEFE MV networks 2 manhiont US$ 30,000 * definiton of opdmum network layouts and 4 man/months US$ 60,000 preparton of system mantenace programs * oranizaton of the warehouse and preparation of 3 man/months USS 45,000 inventory control procedures * organzaon of static and dynamic network data and 6 man/months USS 90,000 procedures for monitoring works caried out and identification of network faults TOTAL 15 man/months US$ 225,000 2. n additon to t techical assance package, ancffilrY 8exn of USS 1.095 milion are requred. Thus, for EDEL and SONEFE, the ancillary expesa amount to: * prcuement of veicles o 20 - 4 wheel drive off-road vehicles USS 220,000 o 10 pick-ups Us$ 150,000 * 20 traors and tilers US$ 3OO Subtot US$ 720,000 * construcion of 3 wareouses at US$ 25,000 US$ 75,00 * housing faclies for the O&M crw M XQQ. I" US$ 1,095,000 *116. ANNEX 3.9 Page 2 of 2 3. Techsical efo ENS and SONE I alo required for orparton of bid documents and projet upvlslo In the mount of USS 1.68 million (80 man-months at US$ 1S,OOO per mu-mon and 40 man-monthe at USS 12,00 p masnmonth. 4. FPot C XD, th foowing nclary asstn I proposed 0 po m Of vehid USS 350,000 * of wavhoUi US$ 20,000 * housing faclies for the 1AM ce L 11Q mm USS 550,00 S. additon, tebhnic a c f k Cii for prepaaton of bid specifcadon and evaluadon and Project supevion In the mount of US$ 450,000 i as proposed. -117- ANNEX 3.10 Pag 1 of I 1. In order to nsu rdliable opeaton and maintenance of a hydrodelec ai, th techn team at tho station hould be comprd of the following membs as a mlnlmm * 1 plant manager (enior lovl) * 1 supevIsion manager (mid-levl) * 1 mantenac manager (mid-levd) a 1 or 2 genal fome (mid-love) * 3 RV deletica 3 3 LV electricians * 3 mecha engie or mehais * 2 electoic egi or teiins * 2 ntr cran and travelin c operars o10 or 15 cotol room operators 2 or 3 shft) * a2 ca mechaics * anillary on-sdll pers re qird 2. Mm Technc sff pret at al dme at the powe saio, soud cary out maintenance of equipment on a daly, woeldy or montly basi accord to a minte e heulb deie for th sation. Us pan opeors, 2 o 3 pe sit deQped on e I ed py of ty e pln ad Ie Iortane In meeting the demand, will opa power station ad m _h A sulpp operator tem, which would replac oe who a on holda or, onsck la, sould _ y mp and coop with wlthe _tm t Omas to ba able toa ep, t o uIn aormd hou u d on wsdm. -118- ANNEX 3.11 Pap 1 of 1 1. In order to operate and maintain the generating plants, Angolan technicias widh Unersity degrees must be available. These may be at the bgnning assisted by foreip technicians In the different areas, so that working habits are changed. Table 1 shows the required number of experts needed for the five priority areas listed during a period of three years (1992-1994). Both ENE and SONEFE lack senior and mid-lovel staff. Tale 1: Technical Assistance - ENE and SONEFE TECHNICAL ASSISTANCE EE _SONE SENIOR MID-LEVEL SENIOR MID-LEVEL _________________ STAFF TECHNICIANS STAFF TMCHNICLANS opmtonandW M.tenac 4 1 2 1 Stwk manmid an I1 1 1 1 P m; -_______- P0iet managaeeNt 1 2 ma ine dag 2 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ (lboraty fai for oil Planin 1 ____ ____ " 1 . _.___._____ _'__ T .tal 9 3 7 2 2. The esdmat cost for tis techical assistamce to place the expert mentioned in Table 1 in ENE and SONEFE is * 360 man-months of senior-level technicians US$ 4,320,000 0 144 man-months of mid-level tedhnici US$ 1,444,000 TOTAL US$ 5,760,000 *119. ANNEX 312 Page 1 of 2 laud= E!. EDE AND = EL E S A=E lebading. lflhlng. ad 1. thoposd toe eal assiac for billng and collecton conit of * t techal experts for 4 month for EDEL USS 144,000 fo estabishing an appropria radngf/billg/collectIon cycle and for computeizing dat and billing input * One ecnd expert for 3 mt to analyze theos81on USS 36,000 and to obtin a ensus of conumer for E * onetch exalepe for CELD for month ILMi Total US$ 192,000 2. The flowig oquipm and matials are required In order to moderni bii anmd collci dearts and metring at SONEFE. Mters for EDEL and CBLB bhv been rported under th nrhabilation program for the distibudon system: * 20 moorcles for EDEL USS 20,000 * 40 unifoms for met readrs and collecto for EDEL USS 4,000 * two cs for SONEFE US$ 14,000 * 10 moorcyces for CDLB US$ 10,000 * 10 unlirms for met reado and coltors for CD US$ 1,000 * a mincomute for EDEL US$ 400,000 0 2 ttmnuls for JDEL USS 5,000 * 10 pronal compute wib 100 MB had disk USS 600000 and sftwar for EN , * 1 mInioput for CEL US$ 50,000 reonsrcon of see turies In Luanda USS 14,000 * reoucdon of two tasres In Lobito and Beguela USS 4,000 Totl USS 582,000 Te foelg and locl componeo for dm cosnt have been aumed to be about 95% and S %, repetiey. -120- ANNEX 3.12 Page 2 of 2 Acuntg 3. The following technical assistance and manpower training is proposed: 0 3 experts for 6 months to carry out a thorough analysis of US$ 216,000 the present accounting system and to adapt the new National System of Accounts, to prepare a flow chart of the document and records and to integrate partial accounting - consumers, fixed assets, reserves - into the general accounting framework. O 1 computer expert for 4 months to provide assistance to the US$ 48,000 programmers for computerizing the new National System of Accounts o 2 instructors for training for 4 months US$ 96,000 * 2 experts to analyze the fixed assets account and to organize 1 22Q the assets according to source and size for 3 months Total US$ 432,000 4. The following purchase of equipment is also proposed in order to improve the efficiency of the acounting departments: * 1 minicomputer for ENE US$ S0,000 * 3 PC's with 100 MB drives for ENE US$ 18,000 * 3 PC's with 100 MB drives for EDEL US$ 18,000 3 1 PC with 100 MB drive for CELB US$ 6,000 o 3 teminals for EDEL USS 7,500 * 1 terminal for CELB US$ 2LZ T,tal USS 102,000 5. In addition, an expenditure of about US$ 15,000 will be required for course material and preparation. -121- ANNEX 3.13 Page I of 2 GE3NERAL TE3CHNIC:AL T3ININZ3 FOR-ALL-EL-EClEC U-MI 1. Table 1 provides an outline of the basic technical courses proposed for utility personnel. Each course Is to last for three months and be atended by 10 trainees in order to get maximum benefit. The selection mechanism of the trainees would have to be developed in close coordination with the electric utilities. The scope of the work of the Task Force would encompass these activities. The selection mechanism would have to take into consideration the following characteristics of the prospective trainee: (a) job experience, (b) ability to learn and (c) age of the prospective trainee. The training activities are aimed at both skilled workers and mid-level technicians. Tble 1: Basic Training Courses and Schedule for the Period 1992-1994 COURSE DESCRlIFION 1992 1993 1994 TOTAL NUMBER l _________________ OF TRAI1NDEES Br* electricty for electrc 40 30 30 100 power systems - Basic meohanios 30 20 10 60 ylydroekcri power stadons 10 20 10 40 Themal power stations (diesol 10 10 10 30 and gas tus) l Susatn 20 - 10 30 Overhead and underground 10 20 20 so asmi lines, .ca t, power and reaos, swigar, lihtng arrters N capaitors Power ystem opton, 10 10 10 30 protectio and control _ _ _ _ _ _ _ _ _ _ _ _ Power system instumentatio 10 20 10 40 and controle nt__ SpAuopaM Otpouremea 20 20 30 70 managemen __ Power system oases and los 10 10 20 40 reduction techniques l Control room opertion 10 10 40 60 (hdoe c desedl d ps utm ..) _ _ _ _ _ Total 180 170 200 SS0 - m. i n = . ... -122- ANNEX 3.13 Page 2 of 2 2. The cost estmates are as follows: (a) Preparadon of 12 courses US$ 120,000 O) Instucdon (16S months) * instruct USS 1,980,000 * AutstM US$ 1,650,000 (a) Consumables US$ 100,000 (d) Subtoal uS$ 3,8so0,0o -123- ANNEX 3.14 Pap 1 of 2 1. L _ahmbo.Izmmsani. The e isting two 220 kV sngle crcult li have a le1th of 175 km. The size of the ACSR conductors are 409 sq.mm., each line capable of carry 130 MW. The linm have been repoealy sabotaged. Lin 1 I prsendy in operation, but t noeds some repa. Line 2 needs a complete rehabflitaton, including a complet inspecton of the fouda . Thereoret, he gost are: (a) To overaul line 1 US$ 4,000,000. (b) To rehabiitat line 2 at US$ 180,000/km US$ 12,000,000. (c) upection of the foundatons US$ 1,000,000. (c) Subtoal US$ 17,000,000. (d) Physcl contingency US$ 3.000,000. (e) Total US$ 20,000,000 2. _M ThI 263 km sige circui line hu been ratedly sabotaged. it Is ISOkV 262 sq,mm,lincablof carrying 80%MW. AssumingthatSO%oftheIl= mabe rplaced and the rest oveaulod, at US$ I5,OO0/qm, the cost esdmas for rhbltation and overl ar: (a) R thabtiot of the line US$ 12,000,000. (b) Physicl contingency US$ 3,000,000. (g) Total US$ 1s,000,000 lpct0 Idution 30 months. -124- ANNEX 3.14 Page 2 of 2 Sswuthe So 3. NamieTombwa line. This is an existing 90 km, 60 kV, 137 sq.mm line with higbly corroded conductors. The entire line must be replaced. At US$ 80,000/km the cost esdmates are: (a) Rehabilitation of the line US$ 3,200,000. (b) Physical contingency US$ 800,000. (c) Total US$ 4,000,000 Expected duration 15 months. -125 - ENERGY SECTOR MANAGEMENT ASSISTANCE PROGRAMME COMPLETED ACTIVITES C owa*iy AAcdl y Date Number SUB-SAHARAN AFICA Africa megional Anglopbne Africa Household Ener Workhop 07/88 085/88 Regional Power Seminar on Reducing Electric Power System Losses in Africa 08/88 087/88 ustitutional Evaluation of EGL 02/89 098/89 Bioms Mapping Regional Worshops 05/89 - Facophone Houseold Energy Workshop 08/89 103/89 interafican Electdcal Enginering College: Proposals for Short- and LoAng-Tem Developmet 03/90 112/90 hioms At and Mapping 03/90 - AnSyola Energy Assossmeat 05/89 4708-ANG Powr Rehabilitation and Toobnical Assisa 11191 142/91 Benm Aor ment 06/85 5m-BEN BotWmn Energy Asment 09/84 4998-BT Pump Electificaion PrefemsbliUty Study 01/86 047/86 Rewiew of Electricity Serviee Connection Policy 07/87 071/87 Tuli Block FarDs Electnfication Study 07/87 072/87 Household Energy Isus Study 02/88 - Urban Household Energy Sroaegy Study 05/91 132/91 Burina Paso Energy Assesment 01/86 5730-BUR Technicd Assistance Program 03/86 052/86 Urban Household Energy Stategy Study 06/91 134/91 Burndi Eegy Aascnnt 06/82 3778-BU Petoleum Supply Management 01/84 012/84 Sus Report 02/84 011/84 Presention of Energy Projects for the Fourth ive-Year Plan (1983-1987) 0/85 036/85 Impoved Cco Cokotove Sbaegy 09/8S 042/85 Peat Utilizstion Project 11/85 046/85 Cope Verde ElVy A _mment 08/84 5073-CV Hous d Energy Stategy Study 02/90 110/90 CXsxnws Energy A _emmt 01/88 7104-COM CXgOW Eixrgy AuseBzbw5 01/88 6420-COB Power Developmnt Plan 03/90 106/90 CX&e d'lvoire EuxV Assessment 04/85 5250-IVC Impoved hiotne Utilition 04/87 069/87 Power System Efficiecy Study 12/87 - Ethiopi Energy Assznt 07/84 4741-ET Power System Effiency Study 10/8S 045/85 Agricultural Reidue Briqueting Pilot Prect 12186 062/86 Baasm Study 12186 063/86 CXK^dg Efficierc Project 12187 - Gabon EnyS Assms5 07/88 6915-GA *126- Coy AetI#Al D1l Nwvor Th mb i EOn"ry Am_m t 11/13 47434M Solar Water Radin htofit Pfqect 02/8 030/ Solar Photovoltao Appatos 03/85 032/8S Petroleum Ouppy ? _pmat A _im OQU04/8 03/85 boh Energy A _tml 11/86 623443R E y to iu n te Industrial Secor 06/88 0s4/88 Sawll Redduse Utiuton Study 11/88 074/87 1e at 11/86 61374UI OiuBlm ism hoq A _mnt 08/84 50834135 Tonal AI Preot 04/85 033/8 Option for thei eotio Powe and Waw Supply m02/9 100/90 PowW ad Water bWittiond Re tdng (Pah) 04/91 118/91 eap A05 S/82 3800.11 Powwr Systm Efficiny Study 03/84 014/84 Stt Rpoz 05/84 016/84 Col Converio Action Plan 02/87 - Sola Wtr etng Sudy 02/87 066/87 PerlUbn Woodfel Delopmet 10/87 076/87 Powe Mow Plan 11/87 - LesothoBmV Ammo 01/84 4676LSO LbulaEnergy As_: 12184 5279-LIR A-J ToooniWA"'(rC<,HYDROELECTRIC FACILITIES AND CAmN' ZAIRE TANZANIA HIGH VOLTAGE TRANSMISSION NETWORK Leendo 1) . * Notkowl Capitol *' AG.; - . \ . ?, Existingt220kv TronsmissionLines i Province Capitols ANGOLA i -S2 [ - --- 220kV Tnrnsmission Lines Options o Selected Towns *; i ZAMBIA 2 ) - Exisring 150kv Tr rnission Lines _ McinRoads = K s < / > f Exis"ing 60kV Tronrmnission Lin - Roilroads |AMIA ; ZIMBABWE Rivers NAMIBIA * IBOTSWANA'y I - ; * ~~~~~~~~~~~~~~~~~~~~~~~~~Airports 2'pELE'SR OF TREEGCONG O 16o J~~~~~f%..' )/' ~~~~~~~~~~~~~~~~~~~~~, ~~~Ports Province Boudaries CA --- Iternational Boundaries Cabint< A I R E o ! 0 UF Z-T A - - - \ 0 100 20D 30000 300 MLES 260 300 0 KILOMETERS Mbanzo Congo,+ Q 4 /~~~~~~~~~~~~~~~~~~~0 rO lli -J ten wwen T i 24' ZAIRE IE U I G / E C. | , n . \ + bt~~~ z A I R E lUA NDi CUANZA | . e LUANDo e . < Ocuongoi S , ,pmome ap% >,Dom, X C \;4J A N Z A ,f XC e . b n.e b Porto \j ro ) /w_k H _ o,^ _>>SoA,<\~~~~~~~~~~~~~~~~~~~~~~~~ne 0 \ c eone en I NGUELA T u m /_ {e E(( ¢~~~~~ \ < D°a~~~~~~~~~v"m t' | ZAMBIA XS X C¢/J ~~~~~~~~~~~C U A N D C;| 16' 10'm* f/A"4 '"K , 5 \ 9 ~~~~) C U B A (3 C, 0: . Ond_ j _ - -_ 'Iva%_ N A M I B I A - 43 ''C12 16' 20' cc C'4 ANGOLA _ UPGRADING AND EXTENSION OF PRIMARY HV NETWORK ATLATC OCEAN LUANDA PROVINCE Pro=ed Prord/ Proposed Upgradng Proposed Upgrading MUTAMBA /of y M> rO Quifangondo Existing forl1995 byt1995 for 2000 byk2000 75V,MVA Subsk fios Ix 20JoOk 7x48MVA /|r ................. ;t7- ...... Addiional transformer I..) F] ~~0I 220/60 kV I4MA601l5kV..17 x 20MVA °O 0 ) 0 D 60/15 kV DA 4 x 20 42x6613k Power Transmiseson MVA 4x6 IV 220 kV 60 kV WANA O SeleedeTowns Urban Area 6 \ 60/30kV 9 Niatond Capital Province Boundaries 3 20 / \ 60/75kV __ ,,3D Luorado I x 20 MVA _________________________ GOLFE I x 20 MVA t of Om CONGO 1 x 20 MVA O ) - 1 - - - T (S ( 1 X 20 MVA KEL3 22M/V6AO 5I X40 MVA ~z - =9 LELA 60/15 kV ATlNTI Sul 60L 2015/1 kkVng A 0AmmSu I 0 V 220I6 15 Sengo ~~~~~~~~~~~~~~~~~0 2 3 4