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An improved PSO for dynamic load dispatch of generators with valve-point effects

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  • Yuan, Xiaohui
  • Su, Anjun
  • Yuan, Yanbin
  • Nie, Hao
  • Wang, Liang

Abstract

Dynamic load economic dispatch problem (DLED) is important in power systems operation, which is a complicated nonlinear constrained optimization problem. It has nonsmooth and nonconvex characteristics when generator valve-point effects are taken into account. This paper proposes an improved particle swarm optimization (IPSO) to solve DLED with valve-point effects. In the proposed IPSO method, feasibility-based rules and heuristic strategies with priority list based on probability are devised to handle constraints effectively. In contrast to the penalty function method, the constraint-handling method does not require penalty factors or any extra parameters and can guide the population to the feasible region quickly. Especially, equality constraints of DLED can be satisfied precisely. Furthermore, the effects of two crucial parameters on the performance of the IPSO for DLED are also studied. The feasibility and the effectiveness of the proposed method are demonstrated applying it to some examples and the test results are compared with those of other methods reported in the literature. It is shown that the proposed method is capable of yielding higher-quality solutions.

Suggested Citation

  • Yuan, Xiaohui & Su, Anjun & Yuan, Yanbin & Nie, Hao & Wang, Liang, 2009. "An improved PSO for dynamic load dispatch of generators with valve-point effects," Energy, Elsevier, vol. 34(1), pages 67-74.
    • Handle: RePEc:eee:energy:v:34:y:2009:i:1:p:67-74
    DOI: 10.1016/j.energy.2008.09.010
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    References listed on IDEAS

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    1. Takriti, Samer & Krasenbrink, Benedikt, 1999. "A decomposition approach for the fuel-constrained economic power-dispatch problem," European Journal of Operational Research, Elsevier, vol. 112(2), pages 460-466, January.
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