Solving Optimal Power Flow Problem via Improved Constrained Adaptive Differential Evolution

The optimal power flow problem is one of the most widely used problems in power system optimizations, which are multi-modal, non-linear, and constrained optimization problems. Effective constrained optimization methods can be considered in tackling the optimal power flow problems. In this paper, an epsilon-constrained method-based adaptive differential evolution is proposed to solve the optimal power flow problems. The epsilon-constrained method is improved to tackle the constraints, and a p-best selection method based on the constraint violation is implemented in the adaptive differential evolution. The single and multi-objective optimal power flow problems on the IEEE 30-bus test system are used to verify the effectiveness of the proposed and improved epsilon adaptive differential evolution algorithm. The comparison between state-of-the-art algorithms illustrate the effectiveness of the proposed and improved epsilon adaptive differential evolution algorithm. The proposed algorithm demonstrates improvements in nine out of ten cases.