Battery Storage Unit for Residential Rooftop PV System to Compensate Impacts of Solar Variations

Electric utilities are becoming concern about unexpected changes in output power of residential rooftop PV systems due to sudden changes in solar radiation and impacts of passing clouds. This paper implements a battery storage energy management strategy (BS-EMS) for existing rooftop PVs to support the household loads, compensate impacts of solar variations and passing clouds while regulating the voltage at point of common coupling (PCC) and providing the grid with a constant output power during daylight. Performance of BS-EMS is investigated through detailed simulations under various grid, rooftop PV and environment conditions

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