Sizing of Degradation Based Battery Storage Systems for Operating Cost Minimization in Microgrids

Abstract

Abstract: A microgrid is a low voltage distribution network designed to provide power for small scale and isolated communities consisting of distributed generation and Energy Storage Systems .One of the major issues in the isolated microgrids with intermittent nature of distributed generation is the balance of energy demand. This can be achieved by appending renewable energy sources with suitable Battery Energy Storage Systems, to provide the reserve support in meeting the load demand. Battery degradation effect plays a major role in analysing the performance of BESS Life Time. This depends on average kWh and average MWh throughput discharge from BESS. Therefore, microgrid system with BESS considering degradation effect should be optimized in such a way as to obtain minimum operating cost while ensuring minimum electricity cost to customers. This paper presents an optimization algorithm for microgrid operating cost and customer electricity cost minimization for 24hrs time horizon while considering BESS degradation effect by determining kWh and MWh throughput. Particle Swarm Optimization (PSO), Accelerated particle swarm optimization (APSO), Jaya optimization (JAYA) technique and Linear programming interior point algorithm (LP-IP) have been applied to determine the optimal operating cost and electricity cost by simulating BESS degradation parameters