Optimal Capacity and Placement of Battery Energy Storage Systems for Integrating Renewable Energy Sources in Distribution System

Battery energy storage can bring benefits to multiply stakeholders in the distribution system. The integration of the Battery Energy Storage System (BESS) and renewable energy sources with the existing power system networks has many challenges. One of the major challenges is to determine the capacity and connection location of the BESS in the distribution system. The installation of BESS units at suboptimal places may increase the cost, including system losses and installation of larger battery capacity. So, it is essential to have a method capable of analyzing the influence of BESS allocation and sizing on power distribution system performance. In this paper, a loss sensitivity based algorithm is proposed for optimal placement of the BESS in the distribution system to reduce the distribution system losses. This paper also presents an algorithm for determining the optimal size of the BESS using particle swarm optimization technique. An electrical distribution utility system data in Ontario have been used to show the performance of the proposed algorithm.