The information in this presentation has been collated by ELEXON and while all due care has been taken to ensure the accuracy of this information, ELEXON accepts no responsibility for errors. The Settlement Process Distribution Losses ‘A Settlements Eye View’ John Lindup The information in this presentation has been collated by ELEXON and while all due care has been taken to ensure the accuracy of this information, ELEXON accepts no responsibility for errors.
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The information in this presentation has been collated by ELEXON and while all due care has been taken to ensure the accuracy of this information, ELEXON accepts no responsibility for errors.
The Settlement Process
Distribution Losses
‘A Settlements Eye View’
John Lindup
The information in this presentation has been collated by ELEXON and while all due care has been taken to ensure the accuracy of this information, ELEXON accepts no responsibility for errors.
Presentation Objectives
• Distribution Losses Perspective from Settlements
• Root Causes
• ELEXON initiatives
Settlements
GSP Group
NHH
HH Export
HH Import
Distributions Losses
Import ExportHH Energy
HH Energy Loss Estimates
Total Uncorrected Energy
HH Energy
NHH Energy
NHH Line Loss Estimates
HH Line Loss Estimates
Uncorrected Energy Vs GSP Group Take
GSP Group Take(Net) NHH Energy + Losses
Net HH Energy + Lossesi.e. (import - export)
Group Correction Factors
GSP Group Correction Factors
Σ
( )ΣΣΣ
Where Σ is the sum of energy within a half hour, this equation produces the GSP Group Correction Factor for that half hour settlement period.
Long-term average correction
ossesGSP Group Take
ses - export)
• Settlement Error within a half hour is expected (Profiles are estimated values and
so are expected to exhibit small
deviations from actual data)
• When group correction factors are averaged over a year this ‘shape’ error should cancel out.
Net NHH Energy + L
Net HH Energy + Losi.e. (import
Group Correction Factors
Annual Demand Ratio (ADR)
Σ
( )ΣΣΣ
Where Σ is the sum of energy within a year, this equation produces the GSP Annual Demand Ratio (ADR), which is used to measure market performance.
Average CF v ADR
• time-weighted average CF over a year measures ‘shape’ and ‘volume’ error
• ADR measures ‘volume’ error only
ADR values
0.92
0.94
0.96
0.98
1
1.02
1.04
07/0
2/01
07/0
3/01
07/0
4/01
07/0
5/01
07/0
6/01
07/0
7/01
07/0
8/01
07/0
9/01
07/1
0/01
07/1
1/01
07/1
2/01
07/0
1/02
07/0
2/02
07/0
3/02
07/0
4/02
07/0
5/02
07/0
6/02
07/0
7/02
07/0
8/02
07/0
9/02
07/1
0/02
07/1
1/02
07/1
2/02
07/0
1/03
07/0
2/03
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