Abstract
Chinese PV system is mainly DC system now. The solar cell sends out electrical energy to the accumulator cell and the accumulator cell supplies power directly for load. Such as solar energy lighting system that Northwestern China use more and the microwave stands for the electrical system far from the grid are DC system. Such a system is simple and inexpensive. It is hard to achieve system standardization and interoperability especially the civil power because of the different of the load DC voltage. Most of the civil electric power is AC load. Photovoltaic power that supplies DC power is difficult to enter the market as a commodity. Therefore, PV grid will eventually run.AC photovoltaic system photovoltaic power generation will become the mainstream in the future.Traditional photovoltaic systems need to adopt anti-islanding control to solve island effect problem. Therefore, the core control circuit generally use the DSP chip.It has problems of control system and algorithm complexity and protection of poor performance. This technical problem to be solved is: Provide a simple grid inverter applying to photovoltaic system with inverter to make the inverter simple and reliable.
