DocumentCode :
1437326
Title :
Redispatching Active and Reactive Powers Using a Limited Number of Control Actions
Author :
Capitanescu, Florin ; Wehenkel, Louis
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Liege, Liege, Belgium
Volume :
26
Issue :
3
fYear :
2011
Firstpage :
1221
Lastpage :
1230
Abstract :
This paper deals with some essential open questions in the field of optimal power flow (OPF) computations, namely: the limitation of the number of controls allowed to move, the trade-off between the objective function and the number of controls allowed to move, the computation of the minimum number of control actions needed to satisfy constraints, and the determination of the sequence of control actions to be taken by the system operator in order to achieve its operation goal. To address these questions, we propose approaches which rely on the computation of sensitivities of the objective function and inequality constraints with respect to control actions. We thus determine a subset of controls allowed to move in the OPF, by solving a sensitivity-based mixed integer linear programming (MILP) problem. We study the performances of these approaches on three test systems (of 60, 118, and 618 buses) and by considering three different OPF problems important for a system operator in emergency and/or in normal states, namely the removal of thermal congestions, the removal of bus voltage limits violation, and the reduction of the active power losses.
Keywords :
integer programming; linear programming; load dispatching; load flow; reactive power; active power losses reduction; active power redispatching; bus voltage removal; control actions; inequality constraints; objective function; optimal power flow computations; reactive power redispatching; sensitivity-based mixed integer linear programming problem; thermal congestion removal; Control systems; Generators; Optimization; Reactive power; Real time systems; Sensitivity; Voltage control; Mixed integer linear programming; nonlinear programming; optimal power flow;
fLanguage :
English
Journal_Title :
Power Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8950
Type :
jour
DOI :
10.1109/TPWRS.2010.2102371
Filename :
5703160
Link To Document :
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