Transmission Ten-Year Development Plan 2011-2020 - Eskom

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24 6.3 NORTH GRID The North Grid consists of five CLNs namely, Waterberg, Rustenburg, Lowveld (northern part), Warmbad and Polokwane. The current transmission network and CLNs are shown in Figure 6.5 below. Figure 6.5: Current North Grid network and CLNs The expected peak demands by 2016 and 2020 and the average percentage load increase for the period for each CLN are given in Table 6 5 below. CLN Peak Load (MW) 2009 Transmission Ten-Year Plan 2011-2020 Forecasted Load (MW) 2016 2020 Ave. Annual % Load Increase Waterberg 544 1107 1443 9.78 Rustenburg 1704 2438 2732 4.43 Lowveld North 1456 2099 2315 4.39 Warmbad 271 243 261 -0.23 Polokwane 1177 1712 1808 4.16 Table 6.5: North Grid CLN load forecast and percentage load increases
The Northern Grid load growth is mainly due to platinum group metals (PGM) and ferrochrome mining and processing activities located in the Rustenburg, Polokwane and Steelpoort areas. The load demand for the years from 2009 to 2020 is expected to reflect the average annual percentage load increases shown in Table 7-3-1 above. The TDP Scheme Projects for the Northern Grid consist of extending the 400kV and 275kV networks as well as establishing the 765kV network, the integration of two power stations (Medupi and Coal 3) and the installation of additional transformers at existing and new substations. These main schemes are as follows: • Tabor and Spencer in the Polokwane area consists of 275kV and 400kV reinforcements. • Rustenburg 400kV reinforcement. • Medupi and Coal 3 power stations 400kV and 765kV integration. • Brits 400kV reinforcement. The TDP scheme projects for the North Grid consist of extending the 400kV and 275kV networks as well establishing the 765kV network, the integration of two power stations (Medupi and Coal 3), and the installation of additional transformers at existing and new substations. The increase in transmission assets by end-2015 and end-2020 and the cumulative total are shown in Table 6.6. Transmission Assets for Northern Grid Table 6.6 North Grid new transmission assets New Assets expected in 2011 - 2015 New Assets expected in 2016 - 2020 Total New Assets expected Total kms of line 2,816 820 3,636 765kV Lines (km) 400kV Lines (km) 275kV Lines (km) Total installed Transformer MVA 700 2,116 0 0 670 150 700 2,786 150 3,820 9,500 13,320 Transformers (no. of) 10 8 18 Capacitors (no. of) 0 0 0 Reactors (no. of) 6 2 8 © Eskom 2011 25
Page 1 and 2: Public Version Transmission Ten-Yea
Page 3 and 4: Disclaimer The purpose of publishin
Page 5 and 6: Table of Contents FOREWORD BY DIVIS
Page 7 and 8: LIST OF TABLES Table 4.1: Connectio
Page 9 and 10: 1. Introduction 1.1 CONTEXT OF THE
Page 11 and 12: Figure 2.1: The Eskom Transmission
Page 13 and 14: of 100MW which represent a cumulati
Page 15 and 16: Potential imported power projects w
Page 17 and 18: 3.2 GENERATION ASSUMPTIONS The majo
Page 19 and 20: 5. National Overview The map in Fig
Page 21 and 22: horizon of the TDP up until 2030. T
Page 23 and 24: CLN Actual Peak Load 2009 (MW) Fore
Page 25 and 26: Johannesburg East Strengthening con
Page 27 and 28: 6.1.4 VAAL CN This CLN consists of
Page 29 and 30: The increase in transmission assets
Page 31: Figure 6.4: East Grid geographical
Page 35 and 36: 6.3.2 RUSTENBURG CLN Rustenburg CLN
Page 37 and 38: 6.4 NORTH EAST GRID The North East
Page 39 and 40: Highveld North Reinforcement • Ro
Page 41 and 42: A network diagram showing the major
Page 43 and 44: The next stage of the reinforcement
Page 45 and 46: A network diagram showing the major
Page 47 and 48: The TDP schemes for the South Grid
Page 49 and 50: 6.6.3 KAROO CLN For the current net
Page 51 and 52: 6.7 WEST GRID The West Grid consist
Page 53 and 54: Cape Corridor 765kV - Phase 4 • C
Page 55 and 56: A diagram showing the major project
Page 57 and 58: Type Total R’mil Customer 6,100 G
Page 59 and 60: Appendix A: Generation Assumptions
Page 61 and 62: APPENDIX B3A: COSTING FOR CENTRAL G
Page 63 and 64: APPENDIX B3C: COSTING FOR WEST GRID
Page 65 and 66: APPENDIX B3E: COSTING FOR NORTH-EAS
Page 67 and 68: APPENDIX B3G: COSTING FOR NORTH GRI
Page 69 and 70: Notes © Eskom 2011 61
Page 71 and 72: Notes © Eskom 2011 63

Transmission Ten-Year Development Plan 2011-2020 - Eskom

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