Photovoltaic is defendable, clean, conserving, ubiquitous and everlasting system. But still compactness, protection,
reliability and monitoring functions are receiving more and more attention in this area. This paper discusses the effect of faults
on multilevel cascaded H-bridge inverter when connected to grid through transmission lines. single phase double stage cascaded
multilevel inverter in different cases with enhanced FRT capability is presented here. In this paper, SDBR concept has been
used.