Intelligent Control Algorithm for Distributed Battery Energy Storage Systems

Recent trends towards bulk renewable energy penetration in the power grid have made it essential to have reserve power in the system to overcome variability and intermittent nature of renewable energy sources. Battery energy storage systems (BESS) are vastly utilized for this purpose but the cost and limited life of batteries limits its use. In this paper a control strategy for battery energy storage systems is proposed in which batteries are discharged based on state of charge and state of health. Simulations are performed in MATLAB. By implementing this algorithm load can be shifted small batteries to batteries with better health and capacity. The results show the working of algorithm and the selection of batteries based on set input variable. In this way battery energy storage systems will have longer lifetime, better efficiency and economical operation