Control strategy of a grid-connected photovoltaic with battery energy storage system for hourly power dispatch

摘要

The high penetration of ?uctuated photovoltaic (PV) output power into utility grid system will a?ect the operation of interconnected grids. The unnecessary output power ?uctuation of PV system is contributed by unpredictable nature and inconsistency of solar irradiance and temperature. This paper presents a control scheme to mitigate the output power ?uctuations from PV system and dispatch out the constant power on an hourly basis to the utility grid. In this regards, battery energy storage (BES) system is used to eliminate the output power ?uctuation. Control scheme is proposed to maintain parameters of BES within required operating constraints. The e?ectiveness of the proposed control scheme is tested using historical PV system input data obtained from a site in Malaysia. The simulation results show that the proposed control scheme of BES system can properly manage the output power ?uctuations of the PV sources by dispatching the output on hourly basis to the utility grid while meeting all required operating constraints.