Planning and Dispatch of Battery Energy Storage in Microgrid for Cycle-life Improvement

Abstract

Over the past decade, there has been an expansion of distribution networks to smart and intelligent microgrids. Microgrids have stood out over the past few years due to the advantage of reliability and resiliency improvement. Also, to establish the cost-effective operation of microgrids, optimal planning of energy storage is noteworthy. Of all energy storage systems, battery energy storage systems (BESS) are chosen as the most advantageous one for a microgrid (MG) operation. However, planning a BESS should comprehensively include the cycle-life and cost-benefit analysis. The present work considers multi-energy sources and loads comprising a MG to allocate appropriate BESS sizes. A mathematical model is contemplated for both islanded and grid-connected modes of the MGs. The model is formulated as Mixed-integer linear programming (MILP) problem and solved using GUROBI. A dispatch model of BESS is also included to enlarge the battery lifetime. Furthermore, a mix of BESS technologies is proposed and validated in a MG test case using YALMIP interfaced with MATLAB.