Abstract—This article introduces an Adaptive Differential Evolution (ADE) method for dealing with optimal reactive power dispatch aiming at power loss reduction. The optimum reactive power dispatch of power systems is to allocate reactive power control variables so that the objective function composed of power losses is minimized and the prescribed voltage limits are satisfied. The proposed method determines the optimum settings of reactive power control variables such as, generator excitation, tap changing transformers, and SVC that reduces the power loss, while maintaining the voltage stability. Mathematically, the problem of this research is a nonlinear programming problem with integer variables. This article presents a new approach that employs the ADE algorithm to solve the problem. IEEE-30 bus test system from the literature is used to exemplify the performance of the proposed method. Numerical results show that the proposed method is better than the other methods.

Index Terms—Adaptive differential evolution, Reactive power dispatch, Power loss reduction, L-index

Cite: K Naga Sujatha and K Vaisakh, "AN ADAPTIVE DIFFERENTIAL EVOLUTION ALGORITHM BASED MINIMIZATION OF POWER LOSS AND VOLTAGE INSTABILITY," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 2, No. 2, pp. 99-110, April 2013.