Aprovechamiento de sistemas de almacenamiento energético mediante baterías para la mitigación de desequilibrios en microrredes eléctricas

Abstract

The massive presence of single-phase loads in electrical distribution systems and their asymmetric nature in real-time operation is the leading cause of voltage and current unbalances in microgrids and weak isolated power systems. Depending on the severity of the unbalance, this condition might compromise the expected performance of system components, reducing efficiency, and negatively impacting its lifetime plus the degradation of the power supply quality. This article proposes a control strategy designedto enable the electronic converters associated with battery energy storage systems (BESS) to mitigate the unbalance introduced by the asymmetrical three-phase load at specific points of the system. The proposal is based on the instantaneous symmetrical components’ theory, and it is designed for implementation in conventional control schemes incorporated in BESS electronics. The effectiveness of the proposal is evaluated on a testbench implemented in MATLAB/Simulink. The simulation results confirm the control strategy’s efficiency and validate the research hypotheses.