Power Control Strategy of Battery Energy Storage System Participating in Power System Peak Load Shifting

As energy and environmental issues become more prominent, the integration of renewable energy into power system is increasing. However, the intermittent renewable energy will pose the challenge to the operation of power system. Utilizing energy storage equipment is an effective solution to enhance power system's operation performance. This paper proposes the constant and variable power charging and discharging control strategies of battery energy storage system for peak load shifting of power system, and details the principles and control steps of the two different control strategies. The capacity of energy storage device is determined by the constraints of peak load shifting. To further investigate two control strategies, the evaluation indexes, including peak clipping rate, peak-valley rate, and standard deviation of load change are designed for assessing effects of different charging/discharging control strategies on the operation of power systems. According to the simulation results of MATLAB, the variable power charging/discharging control strategy of battery energy storage system proves to be a better solution to peak load shifting of power system.