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Research and practice on typical modes and optimal allocation method for PV-WindES in Microgrid

This study investigates the typical configuration mode and optimal allocation method for photovoltaic (PV), wind generator and energy storage (ES) in Microgrid system. Firstly, the six typical scenarios of the hybrid integration modes are discussed. By considering the objectives of minimum PV-Wind-ES investment cost, minimal expectation of energy not supplied (EENS) and minimal line loss, the proposed optimal allocation of PV-Wind-ES is a multi-objective optimization problem. In order to get a comprehensive solution, an improved NSGA-II algorithm is proposed to solve the multi-objective planning problem. Several experiments have been made on the IEEE 33-bus test case and a real implementation of State Grid Corporation of China (SGCC) with the consideration of multiple DG units and ES. The computational result and comparisons indicate the proposed algorithm for optimal allocation of PV-Wind-ES in distribution system is feasible and effective. © 2014 Elsevier B.V. All rights reserved.