optimal accommodation of dg
DESCRIPTION
Optimal Accommodation of DG. Dr Gareth Harrison Dr Robin Wallace University of Edinburgh, UK. Overview. Planning need Planning tool outline Example of operation Update and future work Adequacy/cost effectiveness of available tools. Planning Need. Voltage rise major issue in rural areas - PowerPoint PPT PresentationTRANSCRIPT
1HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
Optimal Accommodation of DG
Dr Gareth Harrison
Dr Robin WallaceUniversity of Edinburgh, UK
2HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
Overview
• Planning need
• Planning tool outline
• Example of operation
• Update and future work
• Adequacy/cost effectiveness of available tools
3HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
Planning Need
• Voltage rise major issue in rural areas
• Mitigation techniques exist– Often expensive
• One alternative is to avoid or limit the need for mitigation in the first place– Indicate where capacity is available
• Must identify where capacity exists
4HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
Planning Tool
• Transmission level studies – Distribution level more onerous
• Various methods applied (GAs, etc.)– DG placement for min loss/investment costs
• Aim here to maximise DG capacity – Optimal power flow
• Implemented with PSS/E and bespoke GUI
5HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
‘Reverse Load-ability’
• Standard PV generator models inadequate
• Steady state model of DG as negative load
• Use load shedding minimisation algorithm to add negative load– maximise power injections
• Termed ‘reverse load-ability’
6HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
180 kW DG on feeder
500 kW DG on feeder
Low demand profile
Simple 11 kV Feeder
7HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
Update
• Original simplifications removed– fixed taps; lack of traditional generation
• Transformer voltage control issue– need to mimic voltage
• Applied to much larger system
• Consistent and logical results
8HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
Extensive Network
9HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
Future Work
• Project due to end in September 2003
• Other aspects– Economic analysis– Development of capacity expansion strategies
• Beyond September 2003– Adapt approach for fault level constraints
10HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
Adequacy of Current Tools
• Not aware of commercial software tool– Academic tools address some aspects of need
• Recently developed tools address the need
• Assessment computationally intensive– Need for re-evaluation with new connections– Move to stochastic standards/planning?
11HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
Cost Effectiveness
• Costs arise from– setup/integration, input/evaluation, computation
and inaccuracy
• Tool requirements– Easy to use, fast, accurate and can be integrated
effectively
• Some current tools likely to meet criteria
12HARRISON UK Author Session 4 – Block 4 – Question 9
Barcelona 12-15 May 2003
Other UoE papers at CIRED
• This work is part of a larger ongoing programme at the University of Edinburgh
• Papers presented at CIRED– 4.44 - Intelligent generator control– 4.62 - Domestic CHP – 4.63 - Optimal accommodation of DG