Comparison of full bridge bipolar, H5, H6 and HERIC inverter for single phase photovoltaic systems - a review

Since the photovoltaic systems development is growing exponentially, the policies related to grid integration will also have to change so that more and more PV systems can be accommodated in the grid. This paper discusses existing Central Electricity Authority (CEA) technical interconnection regulations. As PV penetration increases the CEA can reevaluate the existing operating range for voltage and current factoring the operating conditions in India. Additional features which provide system benefit like reactive power support for an improved voltage profile, intentional islanding, fault ride through capabilities can be thought of. A comparison of transformerless inverters for specific topologies is carried out.