The proliferation of solar power plants has begun to have an impact on utility grid operation, stability, and security. As a result, several governments have developed additional regulations for solar photovoltaic. ••The proliferation of solar plants have an impact on grid operation and. Photovoltaic (PV) is one of the cleanest, most accessible, most widely available renewable energy sources. The cost of a PV system is continually decreasing due to technical breakth. As indicated by various standards, distributed generation units, which are connected to the network by static generator, must include a protection device, usually named in. PV inverter topologies are usually classified according to peculiarities of the inverter topologies. PV inverter topologies are categorized according to the number of stages (single or. Although the main function of the grid-connected inverter (GCI) in a PV system is to ensure an efficient DC-AC energy conversion, it must also allow other functions useful t.