The Research Of 3KW PV Grid-connected Inverter

Along with the development ion of the society, more and more energy sources are needed for people. And the petrochemical energy is being gradually depleted, it is an indisputable fact.So the research of some clean and renewable energy sources is necessary. Solar is currently the world's most clean, the most realistic and most of the prospects for large-scale development and utilization of renewable energy. The application of solar energy in various ways, photovoltaic power generation and network with many advantages, the rapid development. In this paper, solar photovoltaic systems and the core network and network technology photovoltaic inverter in the development of theoretical and experimental do an in-depth study has important practical significance.Inverter is the basic power transformation devices in photovoltaic power system ,the inverter efficiency, reliability and fault handling capacity will directly affect the entire system. The form of the full bridge is chosed for the main circuit topology for the PV-system inverter in this paper.And the intelligent power modules (IPM) PM75DSA120 is chosed for the system and the high speed HCPL4504 is also choosed as its drive circui.Using the high-performance digital signal processor (DSP) made in TI company, so it is possible of making some of the advanced control strategy in the PVsystem.The cuirrent in grid-connected is choosed as the production in control.