1

Enhancing Eskom DistributionNetwork Planning

15 October 2007

Dr Clinton Carter-BrownEskom Industry Association Resource Centre

2 5 15 20

Project Lead Time [years]

Reticulation

Sub-transmission

Transmission

Generation

Ser

vice

Are

a S

ize

Power System Planning Horizons

2

Eskom Distribution Network Planning

2 5 15 20

Project Lead Time [years]

Reticulation (≤33kV)

Sub-transmission (>33kV & ≤132kV)

Transmission (>132kV)

Generation

Ser

vice

Are

a S

ize

Eskom Dx Planning (≤132kV)

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)

Overview of Network Planning dependencies

Base Data

Base Systems

AdvancedMethods

LIRP

Dx

Lin

eE

skom

R

esearch

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

TESCODPlanning SC

5

Overview of initiatives

Basedata

Basesystems

Reliabilityimprovement

Standards &Guidelines

Training &Development

ManagementEnhancedNetworkPlanning

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

Base systems

GLF

PSA PNR

GLF provides the load to be used for network analysis

Purposes.

The GLF provides the load forecast for which the PNR is used to plan future networks.

Future networks build in the PNR environment are used by the PSA for future network analysis studies.

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 environmentBuild projects within geographical environment

Economic analysisof alternatives

GLF (Geo-based Load Forecast)Spatial load forecast with a 25 year planning horizon

8

Improved network reliability

Guidelines &Training

CAPEXReliability link

Probabilisticreliability

assessment

Assetutilisationreporting

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

Standards and guidelines (in draft)

Network planning philosophy Lines and cables Transformers Geo-based load forecasting Unbalanced network technologies

11

Training & Development

Internet based learning

Conventional Classroom

Virtual Classroom

ECSAaccreditation

Three modules targeted forCompletion within 6months

In parallel also started aSpecialist development program

12

Management support

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

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