Abstract
This paper proposes an extended reference current calculation method for the photovoltaic (PV) and battery interfaced three-phase four-wire unified power quality conditioner (UPQC). The proposed PV-UPQC provides compensation against the voltage harmonics, current harmonics and voltage interruption for the whole day. Besides, it exports the power generated in the PV system to the load. The proposed topology utilises the green energy source with an energy storage unit to meet the DC-link voltage requirement of the shunt and series active power filters of the UPQC. The shunt inverter control scheme is based on the use of high selectivity filter for reference current generations. In addition the fuzzy logic controller is implemented for better current control accuracy of shunt active filter. The simulation and experimental studies are carried out to validate the effectiveness of the proposed PV-based three-phase four-wire UPQC.
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