1. 1 Enhancing Eskom Distribution Network Planning 15 October 2007 Dr Clinton Carter-Brown Eskom Industry Association Resource Centre 2515 20 Project Lead Time [years] Reticulation Sub-transmission Transmission Generation Service Area Size Power System Planning Horizons

2. 2 Eskom Distribution Network Planning 25 15 20 Project Lead Time [years] Reticulation (≤33kV) Sub-transmission (>33kV & ≤132kV) Transmission (>132kV) Generation Service Area Size Eskom Dx Planning (≤132kV)

3. 3 Present challenges Increased load growth Universal Access Plan (UAP) Need to improve network reliability Access to critical data Staff turnover and skills Distributed Generation (DG) integration Demand Side Management (DSM)

4. Overview of Network Planning dependencies Base Data Base Systems Advanced Methods LIRP Dx Line Eskom Research Support Present loading (stats metering) As-built HV and MV network data Future load data (demographic and econometric data) Electrification spatial backlog Power System Analysis (PSA) Geo-based Load Forecasting (GLF) Project Needs Register (PNR) DSM load modelling Distributed Generation assessment Economic evaluation of alternatives Reliability assessment Evaluation of supply side and demand side alternatives Standards, guidelines & policies Training National Resources TESCOD Planning SC

5. 5 Overview of initiatives Base data Base systems Reliability improvement Standards & Guidelines Training & Development Management Enhanced Network Planning

6. 6 Base data Data porting into central SmallWorld database Data capture processes Standard values for power system analysis Statistical metering (HV & MV load data)

7. 7 Base systems PSA (Power System Analysis) Export network equipment and related technical attributes to a network analysis application PNR (Project Need Register) Identify needs in a geographical environment Build projects within geographical environment Economic analysis of alternatives GLF (Geo-based Load Forecast) Spatial load forecast with a 25 year planning horizon

8. 8 Improved network reliability Guidelines & Training CAPEX Reliability link Probabilistic reliability assessment Asset utilisation reporting

9. 9 Standards and guidelines (new/updated) MV shunt capacitors MV step-voltage regulators Distribution voltage regulation and apportionment limits MV underground cable systems Network asset cost of supply methodology Methodology for network master plans and network development plans (separate presentation) Reliability guideline

10. 10 Standards and guidelines (in draft) Network planning philosophy Lines and cables Transformers Geo-based load forecasting Unbalanced network technologies

11. 11 Training & Development Internet based learning Conventional Classroom Virtual Classroom ECSA accreditation Three modules targeted for Completion within 6months In parallel also started a Specialist development program

12. 12 Management support Industry Association Resource Centre (IARC) support National Network Integration Forum (NNIF) Master planning Funding Reporting

13. 13 Concluding remarks Intended to make a step-change in the quality and effectiveness of Eskom Distribution Network Planning Result in well trained planners, with the data they require at their fingertips, utilising systems and tools that enhance their effectiveness and assist in the implementation of guidelines and standards Benefit is intended to be realised Industry wide Standards and guidelines are available via DT website