Sizing Optimization of the Battery Energy Storage System for PV Micro-grid

Abstract

For PV-storage microgrid system, a reasonable capacity configuration can compensate for the intermittent defects of PV output, thereby improving energy efficiency and reducing system operating costs. However, the degradation of energy storage batteries in PV-storage system will increase the operating costs of the system. Aiming at this problem, this paper takes the PV-storage micro-grid system as the research object, and builds the operating cost model of the PV-storage micro-grid system on the basis of reducing the degradation of the energy storage battery. An optimization method based on reducing the operating cost of the system is proposed, and the optimal capacity configuration of the PV-storage microgrid system is obtained according to the proposed method. The simulation results show that the proposed method can effectively slow down the degradation of battery and obtain a more reasonable system capacity configuration.