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1 st February 2010 Michael Peters. Demand Side Units with a Maximum Export Capacity < 10MW. 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)
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1st February 2010 Michael Peters Demand Side Units with a Maximum Export Capacity < 10MW
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 M 3 Maximum Export Capacity = 0 8 5 Load CHP
DSU Import Only – Load Reduction Grid M 3 1 Maximum Export Capacity = 0 Load Reduction of 2 MW 8 6 5 Load CHP
DSU with MEC – Normal Operation Grid M 1 Maximum Export Capacity 3MW 4 5 Load CHP
DSU with MEC – Load Reduction Grid M 3 1 Maximum Export Capacity 3MW Load Reduction of 2 MW 4 5 2 Load 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