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Comparison of conventional H6 inverter and bi directional interleaved modulated transformerless inverter

A new transformerless Photo voltaic inverter with bidirectional capability has been developed using the concept of High Frequency Leg (HFL). The size of the filter elements is reduced as high switching frequency is employed. The power handling capacity of the inverter is increased as the number of legs in the circuit is increased. The ripples in the inductor current is also reduced and the efficiency is improved. The bi directional operation of this inverter is more suitable for PV applications. In this paper, a comparison between the conventional H6 inverter topology and the bidirectional interleaved inverter with HFL legs is made and the various parameters like the efficiency, THD and the leakage current are compared.