Technical and Economic Analysis of Battery Energy Storage System – Voltage Management Solution in Power System

This paper proposes a strategy for sizing and optimal operation planning of a centralized Battery Energy Storage System (BESS) which is installed in the distribution power grid to solve voltage violations as the main result of high penetration of solar generation. The strategy is implemented in two steps. The first step is to determine the minimum size of the BESS considering the change of load demand and the solar generation profile over a year. The second step is optimal operation planning of the BESS for a day with cost minimization while satisfying the voltage requirements of the power grid. The efficiency of the method is simulated on a typical low voltage grid of Thailand, using Matlab 2016a and Matpower 6.0 software. In addition, the simulation results also compare the economic efficiency of two popular battery types, Lithium-ion and Lead-Acid batteries