PI-Based Feedback Control Technique for Current Control of the Battery Energy Storage System

A reliable and robust battery current controller mitigates the load transient issues during the mode change and ensures the charging-discharging cycle properly, with improvement in the life cycle of the battery. Minimizing the overshoot, rise time, and settling time with maintaining the DC-link voltage during the load change is crucially important in the field of battery charging. In general, a PI controller is usually used to overcome these challenges. However, a traditional PI controller is suitable for a specific configuration, but it is observed that overshoot and oscillation happen when the load varies. In this paper, a PI-Based Feedback control technique for current control of the battery energy storage system (BESS) is presented. This modified feedback-based proportional and integral (PI) controller is designed to ensure the charging-discharging cycle of the battery with minimum overshoot and settling time. To verify the viability, the proposed system is first simulated in MATLAB and then verified at the OPAL-RT platform.