Distributed Grid-connected Pv Technology Research

The research and experiment of the distributed photovoltaic gridconnected system is carried out in this paper. The circuit configuration of the system is the full bridge which is based on the intelligent power modules. The output current is controlled in the system which is based on the DSP chip of the TMS320F2812.The background and direction of the distributed photovoltaic gridconnected system is analyzed and the research actuality of each part of the system is discussed and compared. The form of the full bridge is chose for the main circuit topology for the system inverter. The intelligent power modules(IPM) is chose for the system and its drive circuit and the periphery circuit of the inverter are designed. The control project of the distributed photovoltaic grid-connected system is carried out and the TMS320F2812 DSP is chose for the control system. The methods for the maximum power point tracking of the solar cell and the islanding prevention of the distributed grid-connected system are analyzed and compared. The results of the experiments and simulation are offered. It can be achieved the purpose of inversion and grid-connection by the the distributed photovoltaic grid- connected system.