Hence, many research works have been proposed recently
to eliminate the leakage current via galvanic isolation and
CMV clamping techniques. Galvanic isolation topologies such
as H5 [18], H6 family [19]–[22], and HERIC [23] introduce
dc-decoupling and ac-decoupling to disconnect the PV and the
grid. It is found that ac-decoupling provides lower losses due to
reduced switch count in the conduction path. Nevertheless, the
galvanic isolation alone cannot completely eliminate the leakage
current due to the influence of switches’ junction capacitances
and parasitic parameters [21], [28]. Therefore, CMV clamping
has been used in oH5 [24], H6 [25], and H-bridge zero-voltage