Optimal Distributed Generation Location in Radial Distribution Systems Using A New Heuristic Method

Heuristic Search and PSO optimization methods and Imperialist Competitive Algorithm(ICA) to optimally determine distributed generation location and size are compared in a distribution network. Objective function consists of power losses and improvement in voltage profile and applied methods are tested on the IEEE 33-bus system. This study demonstrates comparson results of proposed approaches. It includes determination of required DG being installed in an appropriate location. This study also demonstrates that system losses may increase if DG units are connected at non-optimal locations or have non-optimal size.Results indicate that by ICA method, better results are obtained in comparison to PSO and the simple heuristic search method on the 33-bus radial distribution systems. By ICA, maximum loss reduction for optimally placed multi-DGs is determined. furthermore, voltage profile improvement and branch current reduction are achieved.

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