Optimal Dispatch of Interruptible and Curtailable Service Options

Joseph Herriges and Douglas W. Caves

Staff General Research Papers Archive from Iowa State University, Department of Economics

Abstract: Service options for the electric utility industry are increasingly including provisions to dynamically dispatch prices or service interruption calls to customers. When the number of such calls is contractually limited, then the issue of optimally dispatching the calls must be addressed. An algorithm for optimally dispatching interruptible and curtailable (I-C) service options is developed within a stochastic dynamic programming (SDP) framework. The solution yields thresholds for calling load curtailments as a function of: 1. the number of days remaining in the period, 2. the available number of interruptions, and 3. the level of uncertainty regarding future price and cost fluctuations. The SDP approach also provides a framework for optimally designing the I-C program parameters. An illustration of the dispatching routine is provided using data from Niagara Mohawk Power Corp., which is currently using the algorithm as part of its I-C program for industrial and commercial customers.

Date: 1992-01-01
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Published in Operations Research 1992, vol. 40 no. 1, pp. 104-112

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