Primal and dual bounds for Optimal Transmission Switching

It has been suggested that Optimal Transmission Switching (OTS) may reduce generator dispatch costs by as much as 10%, saving millions of dollars annually. However, this conclusion has been deduced primarily from studies using the DC power flow approximation on two power networks derived from the IE...

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Bibliographic Details
Published in2014 Power Systems Computation Conference pp. 1 - 8
Main Authors Coffrin, Carleton, Hijazi, Hassan L., Lehmann, Karsten, Van Hentenryck, Pascal
Format Conference Proceeding
LanguageEnglish
Published Power Systems Computation Conference 01.08.2014
Subjects
AC Power Flow
Approximation methods
Benchmark testing
DC Power Flow
Generators
Mathematical model
Mixed-Integer Nonlinear Programming
Optimal Power Flow
Optimal Transmission Switching
Switches
Topology
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Summary:It has been suggested that Optimal Transmission Switching (OTS) may reduce generator dispatch costs by as much as 10%, saving millions of dollars annually. However, this conclusion has been deduced primarily from studies using the DC power flow approximation on two power networks derived from the IEEE 118-bus and RTS-96 cases. This paper is a systematic study of the OTS problem. Various OTS formulations are considered for computing primal and dual bounds on a variety of power networks. The results demonstrate that the DC power flow model is inadequate for solving the OTS problem, and that mixed-integer nonlinear optimization techniques are instrumental in finding high-quality primal and dual bounds. The paper also indicates that, on a variety of benchmarks, transmission line switching may bring generation cost reductions between 0% to 29%.
DOI:10.1109/PSCC.2014.7038446