Characterization of the Operation of a BESS with a Photovoltaic System as a Regular Source for the Auxiliary Systems of a High-Voltage Substation in Brazil

Substation (SS) auxiliary systems (SAux) are facilities responsible for hosting the alternating (AC) and direct current (DC) busbar to serve equipment that perform substation’s protection, control, supervision. External internal power supplies typically ensure continuity of such a facility. The electricity support will be restricted diesel emergency generators (DG) if external supply is unavailable due contingency. DG present slower response time susceptible starting failures. Microgrids with Battery Energy Storage Systems (BESS) paired photovoltaic (PV) presented as an innovative reliable solution powering SAux. In this article, tests were carried out on microgrid Edson Mororó Moura Institute Technology (ITEMM) in Brazil use microgrids BESS/PV SAux transmission SS São Francisco Hydroelectric Company (Chesf). Without supply, BESS commands action islanded operation, maintaining both voltage frequency requirements without load shedding. It was possible observe all operations microgrid. experimental results showed proposed paper implements dependable self-dispatchable autonomous supply.