Post-outage reactive power flow calculations by genetic algorithms: Constrained optimization approach

Ozdemir A. , LIM J., SINGH C.

IEEE TRANSACTIONS ON POWER SYSTEMS, vol.20, no.3, pp.1266-1272, 2005 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 20 Issue: 3
  • Publication Date: 2005
  • Doi Number: 10.1109/tpwrs.2005.851960
  • Page Numbers: pp.1266-1272
  • Keywords: bounded network, constrained optimization, genetic algorithms (GAs), line outage, reactive power distribution factors, SIMULATION


This paper presents genetic algorithm-based post-outage voltage and reactive power calculations for transmission line and transformer outages. Deficiencies of the traditional sensitivity-based (linear) methods are overcome by formulation of a line outage as nonlinear constrained optimization problem for a bounded networks The proposed optimization problem is later solved for bounded network variables by genetic algorithms. The accuracy of the method is tested on IEEE 14-bus and IEEE 57-bus test systems. Simulation results are compared both with the results of a full power How study and with the results of the papers presented in the literature. The results have shown that the proposed method improves the accuracy of post-outage voltage and reactive power values with less computational effort.