Optimal planning of renewable distributed generation in distribution systems using grey wolf optimizer GWO

The employment of renewable Distributed Generation (DG) sources in Radial Distribution Networks (RDNs) is providing both environmental friendly generation of electric energy and improvement of the overall performance of RDNs. In this study, Grey Wolf Optimization (GWO) algorithm is employed to determine the optimal locations and sizes (OSL) of Photovoltaic (PV) and Wind Turbine (WT) based DGs in RDNs to minimize total active losses. The proposed algorithm is applied to 33-bus and 69-bus systems, and then the obtained results are compared with other methods to verify its validity and effectiveness. The effect of adding one and two units of both PV and WT based DGs at OSL as estimated by GWO is discussed in terms of voltage profile and losses. The simulation results reveal the superiority of the proposed algorithm for finding the optimal location and sizes of PV and WT based DG in RDNs compared to other optimization techniques.

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