“challenges and possible solutions in the power sector” a presentation to the economics...
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“Challenges and Possible Solutions in the Power Sector”
A PRESENTATION TO THE ECONOMICS ASSOCIATION OF ZAMBIA
R P SISALA
MANAGING DIRECTOR10TH JULY 2008
ZESCO LIMITED
PRESENTATION LAYOUT
1. Overview of Zambian Power Sector2. Outline of ZESCO Power System3. The Power Supply Challenge4. ZESCO System Status5. Strategies to Overcome the Deficit6. Conclusion
1. OVERVIEW OF ZAMBIAN POWER SECTOR
I. MAJOR ECONOMIC ACTIVITIES
Mining Agriculture Tourism Industry & Commerce Construction And Housing
II. POWER SECTOR PLAYERS
ZESCO-PUBLIC UTILITY Public Utility Generation, Transmission, Distribution and Supply
COPPERBELT ENERGY CORPORATION Privately Owned Transmission & Distribution to Mines BSA with ZESCO to Purchase Power and Sell to Copperbelt Mines (Ex-
ZCCM) 80MW Gas Turbines
LUNSEMFWA HYDRO POWER COMPANY Privately Owned Generation Capacity-37MW Some transmission lines into Kabwe PSA with ZESCO for Sale of Bulk Power
2. OUTLINE OF ZESCO POWER SYSTEM
I. ZESCO FACT SHEET
Vertically integrated utility Annual turnover: US$$300million Assets in excess of US$3.0billion Customer base: over 300,000 Employees: 3,900 Sales: 9,450GWh National maximum demand: +1,500MW Customer/employee ratio: 80 Approx. 50% sales to CEC & other mining customers 5% exports to regional markets Access rates-27%
II. GENERATION ASSETS
Kafue Gorge - 900MW (990MW)Kariba North Bank - 600MW (720MW)Victoria Falls - 108MWSmall Hydros - 24MW
TOTAL INSTALLED CAPACITY 1,640MW (1850MW)
III. TRANSMISSION ASSETS
330KV - 2,008km220KV - 548km132KV - 85km88KV - 704km66KV - 3,014kmHigh Voltage Substations - 27National Control Centre - 01Regional Control Centres - 03
IV. DISTRIBUTION ASSETS
66kV +3,000km33kV & 11KV+6,500kmMV lines +20,000km In excess of 5,000 substations6 Diesel fired power stations 8MW
D R CONGO
TANZANIA
MA
LA
WI
MOZAMBIQUE
ZIMBABWE
NAKONDE
KASAMA ISOKA
CHINSALI
MPOROKOSO
LUWINGU
MPIKA
PENSULO
SERENJE
CHIPATA
CHIRUNDU
LEOPARDS HILL
KARIBA SOUTH
MUSONDA FALLS (5MW)
LUSIWASI(12MW)
MULUNGUSHI(20MW)
MSORO
LUNDAZI
MFUE
AZELELUNSEMFWA(18MW)
CHISHIMBA FALLS
LUNZUA(0.75MW)
MBALA
SAMFYA
KASHIKISHI
PETAUKE
MOMBUTUTA
CHIENGI
LUAPULA RIVER
To Sumbuwanga
KALUNGWISHI RIVER
MPULUNGU
NAMIBIABOTSWANA
ANGOLA
KALABO MONGU
SENANGA
SESHEKE
SOLWEZI
ITEZHI – TEZHI(120MW)
VICTORIA FALLS(108MW)
MUZUMA
MICHELO
LUANO
KITWE
MAPOSA
KANSUSWA
KABWE
KAPIRIMPOSHI
MPONGWE
LUSAKA WEST
KAFUE WEST KAFUE TOWN KAFUE LOWER(750MW)KAFUE GORGE
900MW(1080MW)
KARIBA NORTH(600MW(750MW)
LAKE KARIBA
MAZABUKA
MUMBWA
MANSA
MAMBILIMA
KA
FUE
RIV
ER
ZA
MB
EZ
I
RIV
ER
CHAMBESHI
RIVER
WEST LUNGA at West Lunga River(2.5MW)
KASEMPA CHIKATA FALLS (3.5MW)
MUFUMBWE
LUKULU
KAOMA
220kV
22o East
33.5o East
8o
18oKATIMAMULILO
ZAMBEZI
LUANGWA
132kV
88kV
66kV
330kV
EXISTING POWER\SUBSTATIONSAND POWER LINES
PROPOSED POWER\SUBSTATIONSAND POWER LINES
330kV
220kV
132kV
88kV
66kV
HYDRO POWERSTATION
SUBSTATION
DIESEL STATION
PROPOSED HYDROPOWERSTATION
PROPOSED SUBSTATION
PROPOSED DIESEL STATION
CHONGWE
CHAVUMA
KABOMPO
MWINILUNGA
KANSANSHI
LUMWANA (Mine)
KAPUTA
NCHELENGE
CHAMA
KUNDABWIKA (101MW)
KABWELUME (62MW)
KAWAMBWA TEA
MBERESHI
LUSIWASIEXTENSION(40MW)
KARIBA NORTHEXTENSION(600MW(750MW)
BATOKA GORGE(800MW)
DEVILS GORGE(800MW)
BWANA MKUBWA
ROMA
COV.
NAMPUNDWE
MAAMBA
KATIMAMULILO
KABOMPO Gorge(34MW)
LuangwaBridge
Mkushi
MkushiFarm Block
Mkushi Central
Kawambwa Town
Chambasitu
SHANGOMBO
MUYOMBE
ZESCO GRID (66 – 330kV)
3. THE POWER SUPPLY CHALLENGE- REGIONAL AND ZAMBIAN PERSPECTIVE
I. MAIN DRIVERS OF ELECTRICTY DEMAND AND THE DEFICIT
Economic Growth of more than 5% in most of the SADC member countries resulting in unprecedented growth in electricity consumption and demand
Driven by increased demand for base metals resulting in high
metals prices on world market
New mining companies established and others expanded
Growth in other sectors such as industry, commerce, agriculture, housing, etc
Country electrification programmes – rural and urban
Inadequate investment in generation and transmission infrastructure over the last 20 – 30 years
II. ENERGY DEMAND PROJECTIONS
EXISTING CAPACITY TO BE EXHAUSTED AROUND 2007/08
BOTH NATIONAL AND REGIONAL DEMAND TO SURPASS CURRENT CAPACITY
NEED FOR NEW POWER PLANTS
ELECTRICITY IS KEY TO NATIONAL ECONOMIC DEVELOPMENT
1998 2007 20102000
Installed CapacityInstalled CapacityFuture demandFuture demand
SAPP DEMAND PROJECTIONS 1998 TO 2010
THE CHALLENGE WAS IDENTIFIEDAND COMMUNICATED BUT NOT ADEQUATELY ADDRESSED
III. CHALLENGES NOT ADEQUATELYADDRESSED
CAPITAL INVESTMENT REQUIREMENTS
- Power projects have long gestation periods- Pre-feasibility & feasibility studies plus EIA - Project packaging and mobilisation of finance- Plus project implementation 5 – 7years- Power sector investments require huge capital outlay - Characterised by long payback periods- But private sector requires short term returns- Power projects compete for capital with more lucrative projects with short term returns
CHALLENGES NOT ADEQUATELYADDRESSED Cont’d
SUB-ECONOMIC TARIFFS
- Tariffs in Zambia too low & not cost reflective - Cannot meet typical investment requirements- Legacy of socialist economy- Topic flavoured by socio-political issues
COMPARISON OF REGIONAL TARIFFS (2007)
UTILITY COUNTRY CURRENCY DOMESTIC (kWh)
COMMERCIAL (kWh)
INDUSTRIAL (kWh)
BPC BOTSWANA USCents/kWh) 6.2 6.1 4.2 CEB MAURITIUS USCents/kWh) 12 18.9 7.2 EDM MOZAMBIQUE USCents/kWh) 11 1.4 5.3 ENE ANGOLA USCents/kWh) 3.7 3.9 2.2 ESCOM MALAWI USCents/kWh) 3.6 6.3 3.9 Eskom SOUTH AFRICA USCents/kWh) 6.1 6.0 2.2 KPLC KENYA USCents/kWh) 9.4 11.4 8.3 LEC LESOTHO USCents/kWh) 6.9 9.6 4.3 NamPower NAMIBIA USCents/kWh) 10.8 10.2 7.0 SEB SWAZILAND USCents/kWh) 6.9 8.4 5.0 TANESCO TANZANIA USCents/kWh) 7.5 8.2 6.3 UMEME UGANDA USCents/kWh) 23 22.6 10.9 ZESA ZIMBABWE USCents/kWh) 0.7 0.5 0.3 ZESCO ZAMBIA USCents/kWh) 2.5 3.7 2.6 REG. AVERAGE SADELEC USCents/kWh) 6.4 8.4 5.0
COMPARISON OF REGIONAL TARIFFS (2007)
REGIONAL TARIFFS 2007
0
5
10
15
20
25
BP
C
CE
B
ED
M
EN
E
ES
CO
M
LEC
KP
LC
Esk
om
TA
NE
SC
O
Nam
Pow
er
SE
B
ZE
SC
O
UM
EM
E
ZE
SA
TA
NE
SC
O
RE
GIO
NA
L
UTILITY
TA
RIF
F (U
S C
ents
/kW
h)
DOMESTIC
COMMERCIAL
INDUSTRIAL
CHALLENGES NOT ADEQUATELYADDRESSED Cont’d
SURPLUS CAPACITY
- Zambia was an energy surplus nation- Economy went through period of stagnation- Did not anticipate high rate of economic recovery-
CHALLENGES NOT ADEQUATELYADDRESSED Cont’d
STAKEHOLDERS AND LOBBY GROUPS
- Sector opened to private investment through Electricity Act CAP 433 of 1995- Govt. established OPPI in 1999- Package of incentives for private sector investment in power projects put in place- Future generation projects to be private sector driven- Endless debates on privatisation and/or restructuring of ZESCO but no new Megawatts- Private sector was seen as panacea for future energy requirements but none came to invest- Generation projects taken away from ZESCO-
ZESCO’S RESPONSE- ZESCO recognised that time was being lost in privatisation and other debates about the structure of the industry- Not permitted to invest in new generation projects- Saw that the nation would one day wake up to a
power deficit- Need for quick intervention at least to delay day of
reckoning- Took the option of changing scope of its Power
Rehabilitation Project to include uprating- Uprating of Kafue Gorge and Kariba North Bank to
add 210MW of additional capacity at minimal cost- This action delayed project completion but it was
worthwhile
ZESCO’S RESPONSE TO CHALLENGES
4. ZESCO SYSTEM STATUS
- PRP in progress at Kafue Gorge and Kariba North Bank power stations
- Total 450MW not available- Available capacity 1,170MW- Current national demand 1,450MW- The deficit is a peak period phenomenon, sufficient
capacity during off-peak periods- Load management otherwise known as load shedding required in order to maintain balance of supply and demand during peak periods
ZAMBIA: CURRENT DEFICIT
TYPICAL LOAD MANAGEMENT SCHEDULE
STATION CAPACITY ( MW)Kariba North 400Kafue Gorge 490Victoria Falls 90Lunsemfwa 30Snel Imports 120
Total Generation 1,130Available Capacity (Less transmission Losses)
1,074
Lusaka allocation 258Ndola allocation 55
C/belt Division allocation 103CEC allocation 470
Kansanshi allocation 75Bwana Mkubwa 12
Others 102TOTAL ALLOWABLE LOAD 1,074
5. STRATEGIES TO OVERCOME THE DEFICIT
I. SHORT TERM STRATEGIES DEMAND SIDE MANAGEMENT
Reduction in peak demand by voluntary load reduction
- otherwise power rationing and load shedding by ZESCO Process efficiencies Use energy efficient appliances equipment e.g.
- replace incandescent lamps with Compact Fluorescent Lamps (CFLs)
Shifting of load away from peak periods
- switch off unnecessary appliances during peak periods e.g. electric geysers, swimming pool pumps, borehole
pumps
- business houses can shift (some) production processes to off-peak and benefit from off-peak tariffs
Power factor improvements
- large consumers such as mines, industry and agriculture
- carefully selected process equipment
- retro-fitting capacitor units on inductive equipment such as electric motors
UPRATING OF EXISTING POWER STATIONS Kafue Gorge - 900MW TO 990MW Kariba North Bank - 600MW TO 720MW Additional capacity: - 210MW
ZESCO to accelerate PRP- complete Kafue Gorge December 2008- complete Kariba North Bank March 2009
Similar projects being undertaken at regional level
SHORT TERM STRATEGIES cont’d
PROMOTING ENERGY EFFICIENCY STRATEGIES - USE OF CFL’s
• Suspension of duty and VAT
• Partnerships with retailers
• Encourage use by consumers
04/21/23
• Save 80%
• USE OF ENERGY SAVING lamps – Compact Flourescent Lamps (CFLs)..
• Dimmer Switchers
INDOOR LIGHTING:Hotels, Homes
04/21/23
INCANDESCENT VS ENERGY SAVER BULB
TYPE OF BULB
WATTAGE 100W 18W
AVERAGE COST K 2,000.00 K 15.000.00
AVERAGE LIFE SPAN 6-12 MONTHS 5-6 YEARS
AVERAGE ENERGY USED PER MONTH (for 3 bed room home 6HRS/DAY)
144kWh 25.92kWh
COST OF ENERGY USED PER MONTH (CURRENT TARIFF K70/kWh)
K12,384.00 K2,222.64
04/21/23
METER INSTALLATION PROGRAMME
• Prepaid meter installed in Lusaka-22,000• Further 60,000 in Phase 2 of Lusaka• 65,000 in Copperbelt• 70,000 in other urban areas by 2010• Reduction in non-technical losses• Increased Energy savings
04/21/23
ENERGY MANAGEMENT
RESIDENTIAL• SWITCHING OFF APPLIANCES
e.g GEYSERS,SWIMMING POOL PUMPS, SECURITY LIGHTING,DEEP FREEZERS, BOREHOLE PUMPS etc.. DURING PEAK LOAD TIMES
• SET GEYSER THERMOSTART @ 60 DEG.
• CORRECT INSULATION
04/21/23
MANAGING GEYSERS
• Switching off 2kw geysers between 07-21hrs• 24hrs operation-864kWh/Month @ K170,000• 10hrs operation-360kWh/Month@K49,000
Savings-K121,000
• Switching off 3kw geysers between 07-21hrs• 24hrs operation-1296kWh@K276,000• 10hrs operation-540kWh@K138,000• Savings-K138,000
04/21/23
SECURITY/OUTDOOR LIGHTINGHOMES, HOTELS, INDUSTRY
Save 80% by replacing ML 160w with Master Ecotone 45w/65w lamps
COMMERCIAL
• INSTALL ROOM OCCUPANCY SENSORS – to switch off lights & air-conditioning in unoccupied rooms
• INSTALL POWER FACTOR CORRECTION EQUIPMENT (where lots of electric motor are in use)
• REPLACE ORDINARY BULBS WITH ENERGY SAVERS (CFLs)
• REPLACE MERCURY VAPOUR LAMPS WITH METAL HALIDE LAMPS (45W/60W FOR 160W) FOR OUTDOOR LIGHTING
ROOM OCCUPANCY SENSORS
• INSTALL IN EACH ROOM
• SWITCHES OFF LIGHTS & AIRCONS IN UNOCCUPIED ROOMS
INDUSTRIAL
• INSTALL ELECTRIC MOTOR OPTMISERS ON BIG MOTORS
• USE Variable Speed Drives (VSDs) for pulley coupled drives
• INSTALL POWER FACTOR CORRECTION EQUIPMENT(CAPACITOR BANKS)
• DO NOT START ALL YOUR MACHINES AT THE SAME TIME TO AVOID CREATING LOCAL PEAK LOADS
• ARREST ALL COMPRESSED AIR LEAKS• INSULATE ALL STEAM PIPES CORRECTLY
• Intelligent because it matches power input to shaft load
• Saves up to 40% energy
• Has inbuilt soft start/stop
• Reduces inrush currents
04/21/23
INTELLIGENT MOTOR CONTROLLERS
Floor mounted Capacitor Bank
• Power factor correction
• Reduces KVA input• Save up to 15%
energy
VARIABLE SPEED DRIVES (VSD)
• SAVE UP TO 15% ERNEGY
STREET LIGHTING:USE METAL HALIDE LAMPS
• REPLACE THE INEFFICIENT MERCURY VAPOUR LAMPS WITH METAL HALIDE LAMPS
• 400W/250W MV LAMPS WITH 160W METAL HALIDES
• METAL HALIDES HAVE INBUILT SENSORS TO RUN DIM WHEN NO TRAFFIC ON ROAD
• ENHANCED BRIGHTNESS
REVISED SAPP PROJECTIONS 2005 TO 2020
Committed - Rehabilitation - Short Term
36000
40000
44000
48000
52000
56000
60000
64000
68000
72000
20
05
20
06
20
07
20
08
20
09
20
10
20
11
20
12
20
13
20
14
20
15
20
16
20
17
20
18
20
19
20
20
Year
MW
Capacity Planned Capacity Required Peak Demand after DSM
INCREASE GENERATION CAPACITY BY BUILDING NEW PLANT
Zambia has an estimated hydro power potential of 6,000MW of which less than 2,000MW has been harnessed. Sites yet to be developed include Kafue Gorge Lower, Itezhi Tezhi, Kalungwishi, Mambilima, Batoka Gorge, Devil’s Gorge, Kabompo, etc
II. MEDIUM TO LONG TERM STRATEGIES
In Zambia planned projects include the following ZESCO projects:
Itezhi Tezhi
- Capacity120MW
- Cost US$250Million
- Implementation 2008 – 2012
Kariba North Bank Extension
- Capacity: 360MW
- Cost: US$300Million
- Implementation:2008 – 2012
MEDIUM TO LONG TERM STRATEGIES cont’d
INCREASE GENERATION CAPACITY BY BUILDINGNEW PLANT
Other planned projects in Zambia include:
Kafue Gorge Lower 600 – 750MW Maamba (Coal fired) 300 – 450MW
Similar projects planned or in progress at regional level
MEDIUM TO LONG TERM STRATEGIES cont’d
REGIONAL INTERCONNECTIONS TO OTHER UTILITIES (TO SHARE REGIONAL GENERATION CAPACITY)
Existing
- Zambia – Zimbabwe: 2 x 330KV
- Zambia – DRC: 1 X 220KV
Planned
- Livingstone – Hwange (Zimbabwe): 1 x 330KV
- Livingstone – Katima Mulilo (Namibia): 1 x 220KV
(Phase 1 on Zambian side complete, phase 2 in Namibia in progress)
- Kafue – Livingstone: upgrade existing 220KV to 330KV
- Zambia – DRC: 1 x 330KV
- Zambia – Tanzania – Kenya: double circuit 330KV
-
Planned interconnectors between Other planned projects in Zambia include:
Kafue Gorge Lower 600 – 750MW Maamba (Coal fired) 300 – 450MW
Similar projects planned or in progress at regional level
MEDIUM TO LONG TERM STRATEGIES cont’d
Map of Southern Africa
10 40
Equator
45
6. CONCLUSION
Power sector crucial to dynamic economic growth
Massive investments required in power sector
Cost reflective tariffs an important element in all efforts
Demand Side Management crucial to manage deficit
The task is heavy but not insurmountableNeed for all stakeholders to play their part
THANK YOU