Optimal reactive power dispatch using particle swarm optimization with time varying acceleration coefficients

In this paper a particle swarm optimization with time varying acceleration coefficients (PSO-TVAC) algorithm is applied to solve the optimal reactive power dispatch problem (ORPD). The ORPD problem is formulated as nonlinear, non-convex constrained optimization problem considering both continuous and discrete control variables, also it has both equality constraints and inequality constraints. The acceleration coefficients in PSO algorithm are varied adaptively during iterations to improve solution quality of original PSO and avoid premature convergence. The feasibility of the proposed algorithm has been tested on the IEEE 14-bus and IEEE-118 bus test systems. Moreover, the obtained results are compared with those available recently in the literature.

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