Multi-Objective Optimal Reactive Power Dispatch for Distribution System

This paper presents Multi-Objective Differential Evolution (MODE) algorithm for multi-objective optimal reactive power dispatch to minimize real power loss, total voltage deviation and total capacity of reactive power sources in distribution system. In a distribution system integrated with distributed generation (DG), optimal reactive power dispatch can be carried out by controlling the reactive power of the DG and reactive power compensation devices like capacitor banks, FACTS devices and other sources of reactor power. Optimal reactive power dispatch (ORPD) problem has been formulated as a non-linear, constrained, multi-objective optimization problem, with equality and inequality constraints, for minimization of system real power losses, improvement voltage profile with minimum total capacity of reactive power sources. Effectiveness of the proposed MODE algorithm has been demonstrated for optimal reactive power Dispatch in the standard IEEE 33-bus radial distribution system having distributed generators and reactive power sources.