A Novel Control of Three-Phase Four-Wire Shunt Hybrid Active Filter for Grid Connected PV System

Article history: Photovoltaic array, High step-up DC-DC boost converter, Voltage source inverter (VSI), Total Harmonic Distortion (THD), Shunt hybrid Active Power Filter, Neutral current compensation. This paper proposes a Photovoltaic (PV) fed three-phase four-wire shunt hybrid active power filter (APF), it comprises of a shunt active power filter and series connected LC passive filter. The shunt active power filter demands a source of energy for compensating the current based distortions, which utilizes the photovoltaic array with DC-DC boost converter as a source of DC power.The shunt connected inverter controls the DC link voltage as well as the active and reactive power transferred between the renewable energy sources to grid with improved power quality.The PV array / battery managed DC-DC boost converter is employed to step up the voltage to meet the DC bus voltage requirement of the three-leg voltage source inverter (VSI). The main benefits of the proposed system are that it will provide uninterrupted compensation for the whole day and compensate the voltage interruption. This system utilizes the renewable energy accordingly saves the energy, share the load and provide the uninterruptable power supply to critical/sensitive load, through the PV array/battery bank on both day and night time. The simulation studies are carried out in the MATLAB/Simulink environment and results are obtained to confirm the effectiveness of the proposed configuration.

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