Optimal allocation of energy storage systems in connected microgrid to minimize the energy cost

Nowadays, finding the optimum locations of energy storage systems (ESS) and distributed energy resources (DER) in a microgrid is very controversial. In this paper, a novel method based on harmony search algorithm (HSA) is proposed to find the optimum locations of ESSs in a specified microgrid. The microgrid has renewable energy resources, and it is connected to the main network. This method will minimize the amount of purchased energy from the main network. Finally, the proposed method will be tested on 37-bus IEEE standard network which has 4 ESSs and capability of using renewable energy resources.