The Electric Power System
- South Africa -
South African Power System
Basic Facts
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Area:
1,221,037 km2
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Population:
51,8 Million (2011)
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Vertically integrated Utility Gx, Tx, Dx
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Peak load: approx. 34,768 GW
•
System average interruption duration index
(SAIDI) = 36.2RAhours
(RA Reasonable assurance provided by the independent assurance provider)
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South Africa in the
Southern African Power Pool meshed grid
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Interconnectors to:
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Botswana
Lesotho
Mozambique
Namibia;
Swaziland
Zimbabwe
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Grid facts and characteristics
Source :Eskom Annual Report Fact
sheet
The electricity grid in South African is sub-divided into transmission grids
(220/275/400/765kV) and distribution grids (132/88/66/44/33/22/11kV)
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Structure of electrical power supply
765 kV
TSO
TSO-Grid
Single TSO
Eskom Tx
Eskom
Conventional
Generation
Bulk-Industry
400 kV
275 / 220 kV
132 / 88 / 66 kV
DSO-Grid
Industry
Municipality
& Eskom Dx
Networks
33 / 22 / 11 kV
RE & other
IPP
Generation
240 V
Households
DSO
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Source : Eskom Annual Report 2015
High Voltage Grid
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Cooperation of TSO and DSO:
Cascade in Generation Dispatching of Renewables
In case of (n-1)- security violations in the EHV-grid due to high dispersed
generation TSO and DSO collaborate to lower the infeed of renewable
generation in DSOs grid. TSO initiates and DSOs operate these
measures according following cascade:
Transmission
grid
Distribution
grid 1. Level
TSO
DSO
National Control
• 765 kV – 132 kV
• Frequency control
• Voltage control
• System security
DSO
Regional Control
132 kV – 66 kV
Voltage control
System security
Distribution grid
2. Level
Grid area
DSO
DSO
Regional Control
Generation
Load
66 kV – 11 kV
Customer supply
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Installed capacity with reference to primary resources
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Energy production with reference to primary resources
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Development of Generation Capacity
2015 to 2025
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Consumption
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Renewables
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Location of Renewable Energy Sources
Location of RE projects from first 3 rounds of the RE IPP
procurement programme in South Africa
Solar Irradiation map
of South Africa
Wind resource map of
South Africa
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Market
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Electricity Industry Structure in South Africa
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