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Evaluating Optimal Cost-Effectiveness of Demand Response in Wholesale Markets

Negash, Ahlmazh I.; Westgaard, Sjur
Journal article, Peer reviewed
Accepted version
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URI
http://hdl.handle.net/11250/2596689
Date
2018
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  • Institutt for industriell økonomi og teknologiledelse [3391]
  • Publikasjoner fra CRIStin - NTNU [41869]
Original version
IEEE Power & Energy Society General Meeting. 2018, .   10.1109/PESGM.2018.8586377
Abstract
Economic demand response (DR) is intended to lower locational marginal prices (LMP) in wholesale energy markets during peak hours. DR resources are paid LMP and that cost is allocated to energy buyers. Market operators use a "net benefits test" to determine if DR is cost effective. This test identifies the LMP threshold below which DR is not cost effective; however, it cannot identify an optimal quantity of DR. Under the current net benefits test, acquisition of "all cost-effective DR" effectively results in a wealth transfer from generators to DR resources and LMPs that are no lower than without DR. Since DR, unlike energy, has no utility, this is not an ideal test of DR cost effectiveness. In this paper, we present a) an alternative method for evaluating the cost effectiveness of economic DR in wholesale markets that makes use of unique DR supply and demand curves, and b) an alternative welfare analysis methodology that identifies maximum social welfare (optimal quantity of DR). We find that because DR has no utility beyond lowering market prices, the optimal quantity of DR does not occur at market equilibrium. Rather, it occurs at the point where potential financial gain from DR is equal to dead weight losses.
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Journal
IEEE Power & Energy Society General Meeting

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