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An AC OPF-based Heuristic Algorithm for Optimal Transmission Switching
Capitanescu, Florin; Wehenkel, Louis
2014In Proceedings of the 18th Power Systems Computation Conference
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Keywords :
power systems; optimization; discrete variables
Abstract :
[en] This paper focuses on reducing generators dispatch cost by means of transmission line switching. The problem is formulated as a mixed-integer nonlinear program (MINLP) optimal power flow (OPF). A scalable heuristic algorithm is proposed to break-down the complexity of the problem due to the huge combinatorial space. The algorithm aims at providing the sequence of lines to be removed from service, one at the time, until no further decrease in the dispatch cost can be obtained. It identifies the line candidate for removal at each step by exploiting the (continuously relaxed values of) lines breaker statuses at the solution of a relaxed OPF problem. The algorithm thus relies on solving a sequence of OPF problems formulated as nonlinear programs (NLPs). The effectiveness of the approach is demonstrated on the IEEE118-bus system. Results show that the approach can provide good quality sub-optimal solutions with relatively small computational effort and by removing only few lines from service.
Disciplines :
Electrical & electronics engineering
Energy
Author, co-author :
Capitanescu, Florin
Wehenkel, Louis  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Systèmes et modélisation
Language :
English
Title :
An AC OPF-based Heuristic Algorithm for Optimal Transmission Switching
Publication date :
August 2014
Event name :
18th Power Systems Computation Conference
Event organizer :
PSCC
Event place :
Wroclaw, Poland
Event date :
August 18-22,2014
Audience :
International
Main work title :
Proceedings of the 18th Power Systems Computation Conference
Pages :
1-6
Peer reviewed :
Peer reviewed
Available on ORBi :
since 28 August 2014

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