Three-phase shunt connected Photovoltaic generator for harmonic and reactive power compensation with battery energy storage device

This paper presents a solar Photovoltaic (PV) inverter along with a battery energy storage device in shunt with a three-phase grid. Apart from sharing the load active power, the other objective of the PV-battery integrated system is to provide load harmonic and reactive power compensation throughout the day. The interface between the grid and the PV is carried out through a voltage source converter. The voltage across the DC bus capacitor is regulated to maintain a unity power factor operation of the system, irrespective of changes in solar radiation level or due to change in load. A bidirectional DC-DC converter is employed to charge and discharge the connected battery energy storage device. The performance of the system is analyzed with and without the battery, in order to highlight the importance of battery energy storage system.

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