Transmission Ten-Year Development Plan 2011-2020 - Eskom

6.1.4 VAAL CN
This CLN consists of seven transmission substations and one power station supplying both residential and heavy
industrial loads. The anticipated high load growth nodes are at Makalu and at Kookfontein MTS. The main projects in
the Vaal CLN are as follows:
Vaal Strengthening Phase 1 (Closing of the Hera-Bernina 275kV link)
• Uprating of terminal equipment at Hera, Bernina,Taunus, Princess,Westgate, Glockner, Kookfontein,Verdun and
Scafell S/S
• Bernina S/S refurbishment
• Glockner 3rd 400/275kV 800MVA transformer
• Glockner 275kV Busbar replacement to tubular 2011
Vaal Strengthening Phase 2 (Glockner-Etna 2x400kV lines operated at 275kV)
• Glockner-Etna 1&2 400kV lines operated at 275kV
• 2x 275kV lines bays at Glockner S/S
• 2x 275kV lines bays at Etna S/S 2011
Kookfontein Transformation Phase 1 strengthening involves the addition of 2 x 88kV 48 MVAR
capacitor banks at Kookfontein substation. 2011
Kookfontein Transformation Phase 2 strengthening involves the 3rd 275/88kV 315MVA transformer and
3rd Glockner Kookfontein 275kV line (Customer dependent) 2015
A network diagram showing the major projects in the Central Grid is shown in Figure 6.2 below:
Figure 6.2: Central Grid network diagram
© Eskom 2011 19