Transcript Meeting 33 Fingleton and White Slides

Demand Side Units with a Maximum
Export Capacity < 10MW
1st February 2010
Michael Peters
Introduction
 DSU sites which can offer demand reduction through a
combination of:
 Load Reduction (refrigeration, pumps etc.)
 Standby diesel generators
 Inactive CHP plant (possibly seasonal)
 Sites with large heat load typically have export capacity –
but profile still similar to demand only site
Modification Proposal
 The demand site shall have a Maximum Import Capacity
and shall not have a Maximum Export Capacity greater
than the De Minimis Threshold.
DSU Import Only – Normal Operation
Grid
3
M
Site Load:
8MW
CHP Generation:
5MW
Grid Import:
3MW
Maximum Export Capacity = 0
8
5
Load
CHP
DSU Import Only – Load Reduction
Grid
1
3
M
Load Reduction:
2MW
Revised Site Load:
6MW
CHP Generation:
5MW
Revised Grid Import:
1MW
Maximum Export Capacity = 0
6
8
Load Reduction of 2 MW
5
Load
CHP
DSU with MEC – Normal Operation
Grid
1
M
Revised Site Load:
2MW
CHP Generation:
5MW
Revised Grid Export:
3MW
Maximum Export Capacity 3MW
4
5
Load
CHP
DSU with MEC – Load Reduction
Grid
3
1
M
Load Reduction:
2MW
Revised Site Load:
2MW
CHP Generation:
5MW
Revised Grid Export:
3MW
Maximum Export Capacity 3MW
2
4
5
Load
Load Reduction of 2 MW
CHP
Load Reduction Profile
2MW Load Reduction
has the same benefit
to the system whether
it is reducing demand
or “negative demand”
Why not participate as AGU?
 Does not capture load reduction potential
 Gross settlement results in excessive import costs
 If generation capacity > MEC => Non-Firm Access
Conclusion
 The Modifcation Proposal:
 Encourages greater participation of Large Energy Users in
wholesale market through DSUs
 Furthers Code Objectives through:
 Development of SEM
 Promotes competition
 Promotes long-term interests of consumers