Development of photovoltaic grid-connected inverter assistant power supply using topswith chip

Solar power based on the technology of grid-connected photovoltaic power has become the fastest growing and most widely application in the view of solar energy application. In this paper, the working principle and designing desire of assistant power in grid-connected photovoltaic system was presented, TOPSwitch chips is the core of This assistant power and the design course of main component is given. Through experiment result, it can be proved that the design is correct and valid. The design method not only simplify the circuit of the assistant power and reduce the production cost, but also improve the Electro Magnetic Compatibility characteristics. It has high practical value.