Power Quality Enhancement in Power System through Optimal Placement of Dynamic Voltage Restorers Using Improved Grey Wolf Optimization

Abstract

This paper proposes an advanced optimization approach based on the Improved Grey Wolf Optimizer (IGWO) for determining the optimal placement and sizing of Dynamic Voltage Restorers (DVRs) in distribution systems to improve power quality. The optimization problem is formulated with a multi-objective function aimed at minimizing voltage total harmonic distortion (THD) and overall investment cost, while also improving the system's voltage profile. The effectiveness of the IGWO algorithm is validated through simulations on a modified IEEE 16-bus radial distribution network using MATLAB. Comparative analysis is carried out against the standard Grey Wolf Optimizer (GWO). The simulation results reveal that the IGWO demonstrates better performance in terms of accuracy and optimization capability for DVR integration compared to GWO.