Battery Energy Storage System to Support Voltage in Distribution System with High PV Penetration
Keywords: Battery, Distributed Generation, Distribution System, High Penetration PV, Voltage Regulation
AbstractThis work performs a sensitivity analysis regarding the control of Battery Energy Storage System. (BESS) for the regulation of voltage levels in a distribution system with high photovoltaic penetration. In the evaluated methodology, the BESS system is connected to a bidirectional DC/DC converter in current, through which it is possible to define the power to be absorbed or injected by the battery. By adjusting this reference power, it is possible to control the voltage profile of the network, and this adjustment is defined from reference curves that take into account the system's strategic voltage readings. By varying the parameters of the reference curve, the impact on battery power and, consequently, on the voltage profile of the system is evaluated, drawing a sensitivity of the voltage profile with the control reference curve. To test this methodology, a simulation environment was created via Simulink/Matlab, modeling the Cigré 18- Bus test system, to which photovoltaic generation points and the BESS system were added. Then, the system was submitted to real load and solar irradiation curves, and the performance of the BESS and the behavior of the voltage in the network were evaluated.