Impact analysis of the BESS insertion in electric grid using real-time simulation

With the increase of non-linear loads connected to the electrical grid and the use of renewable sources with intermittent generation, it is necessary to use battery energy storage systems (BESS) to provide solutions for electric power quality, besides contributing with the development and reliability of distributed generation systems. In this work, a three-phase inverter powered by a BESS is controlled in order to mitigate the harmonic components derived from the non-linear loads insertion in the electrical grid, and to inject active power to maintain the energy supply at low-generation periods. The paper presents both simulation and experimental results using the OP5707 real-time simulator from OPAL-RT Technologies, which emulates the entire system under study. Different scenarios are analyzed, demonstrating the system's contribution to the energy quality and to the injection of active power in the electrical grid.