The optimal loss reduction of distribution feeder based on special distribution transformers reconnection using genetic algorithm

Many utility companies of Taiwan Power Company (TPC) used the open wye-open delta (OYOD) transformers to serve various customers. This causes phase unbalance which is one of the prime reasons of ground relay tripping and extra line loss in the distribution system. Load reconnection, feeder reconfiguration and capacitor placement are common methods used to balance load or minimize power loss. The purpose of this paper is to reduce power loss by means of load reconnection of the prime phase sequence of the OYOD transformers used. Genetic algorithms (GAs) have been implemented for solving the optimal problem. Practical examples of TPC demonstrate that the proposed method is effective and available.