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
