Voltage and Frequency Control of Microgrids With Distributed Generations and Battery Energy Storage

In this paper, a proportional-integral (PI) controller has been designed to regulate the frequency and voltage at steady-state conditions for a microgrid (MG) with distributed generations. The MG consists of a diesel synchronous generator and photovoltaic power system coupled with a battery energy storage system (BESS). The methodology is primarily based on differential evolution optimization (DEO) technique and artificial neural network (ANN). The BESS-based PI controller has been designed and optimized for several operating conditions. Consequently, the ANN is trained to restore the system frequency and voltage for any disturbance within a prescribed range. It has been observed that the trained ANN is fairly robust against disturbances within the predefined range. Finally, the simulation results prove the effectiveness of the proposed controller.