Research on Reactive Power Compensation of Distribution Network Based on Improved NSGA-II Algorithm

Aiming at the problems of local voltage-based control, insufficient coordination between discrete switching devices and continuous reactive power devices, and incomplete consideration of both network losses and device losses in distribution networks, a multi-objective reactive power compensation model is proposed. The model is formulated for a medium-voltage radial distribution network. Capacitor banks, shunt reactors and distribution-level SVC devices are described with explicit operating constraints, while branch-flow equations are used to represent network power balance and voltage limits. An improved NSGA-II algorithm with mixed coding, feasibility-priority constraint handling and sensitive-gene local search is developed. Case studies show that the proposed method can obtain feasible Pareto solutions among active power losses, voltage deviation and switching actions, providing a technical reference for reactive power compensation in distribution networks.