Selection of battery size by using power flow decision program for microgrids

Abstract

This paper concentrates on determining the size of energy storage system (ESS) for microgrid (MG). Renewable energies are intermittent, and their productions are stochastic and can cause insufficiency in supply of electrical systems. Applying an ESS can alleviate impact of renewable energies. ESS acting a main function in the MG, it is advantageous to shave the high demand and store the excess energy. Sizing of ESS can be viewed as primary while considering ESS in the MG. The majority of MGs work in grid-connected mode. ESS is used to store additional power created by sustainable power sources for the duration of low demand period and redispatching during high demand period. To determine size of an ESS, the aim is to minimize total annual operating cost, and this can be accomplished by using power flow decision.