Self-Healing Policy in Distribution Network Considering Technical Indices

Abstract

The security of power supply on electricity distribution networks are getting more important day by day. The self-healing capability of the network can help in improving security. In this paper, the self-healing is achieved by introducing a multi-criteria optimization model, where the solution is chosen after the evaluation of technical indices. In the presence of a fault, network reconfiguration is one of the feasible methods for implementing the self-healing policy in distribution networks. The objective function of this method is evaluated by implementing reliability indices, active power losses, branch load limits, and voltage deviation limits after reconfiguration. Considering these objectives, three cases are defined which have different arrange from objectives. Also, by aggregating the functions, which convert a multi-objective problem into a single equivalent objective, the appropriate topology of the IEEE 17-bus distribution system after appearance a fault is suggested and compared with Pareto solutions of the multi-objective problem.