Photovoltaic (pv) grid power generation system consists of pv modules, grid inverter, metering device and the power distribution system. Photovoltaic modules can convert solar energy to dc, the dc can convert by grid inverter to the power grid of the same frequency, and phase ac sinusoidal electrical energy, part of the supply of local load and the remaining part of the feed into the grid.

Photovoltaic (pv) grid inverter is the core of the photovoltaic (pv) grid power system equipment, its reliability, high efficiency, security will affect the entire solar system, is directly related to power generation and operation stability.