Transmission Ten-Year Development Plan 2011-2020 - Eskom

The next stage of the reinforcement of the Main Cape Corridor, if required in 2019, will pass through the North West
grid, linking Selemo (Epsilon) 765kV to Gamma 765kV via Perseus 765kV. The total length of this 765kV line project
has been allocated to this grid.
The increase in transmission assets by end 2015 and end 2020 and the cumulative total are shown in Table 6.10.
Transmission Assets
for North-West Grid
New Assets expected in
2011 - 2015
Table 6.10: Cumulative assets for North West grid
New Assets expected
in 2016 - 2020
Total New
Assets expected
Total kms of line 1,345 2,349 3,694
765kV Lines (km)
400kV Lines (km)
275kV Lines (km)
Total installed
Transformer MVA
955
390
0
1,600
639
110
2,555
1,029
110
4,250 1,750 6,000
Transformers (no. of) 8 5 13
Capacitors (no. of) 9 0 9
Reactors (no. of) 7 10 17
6.5.1 CARLETONVILLE CLN
The North-West Grid is composed of four CLNs namely Bloemfontein, Carletonville, Kimberley, and Welkom.
The current transmission network and CLNs are shown in Figure 6.9 below.
The new Watershed B 400/132kV substation west of Watershed is proposed; it is intended to de-load and
provide support to Watershed via the 132kV network by 2017. Load growth in the area is driven by the cement
industry and mining activity. Platinum and ferrochrome mining and processing activity is expected to materialise north
of Watershed.
The project will comprise the following:
7 Build a 400kV line from Selemo (Epsilon) to Watershed B substation 2017
8 Establish 400/132kV transformation at Watershed B 2017
© Eskom 2011 35