Single-phase Two-type Photovoltaic Grid-connected Power Converters

With the development of economic and industry, the energy crisis and pollution have become more serious. Now renewable energy resources are researched to solve these two problems. In those green energies, photovoltaic power generation attracts more attention because of its pollution-free and makes great progress.In this paper, single phase grid-connected photovoltaic power generation converter is studied, which is composed of a DC-DC converter and a DC-AC inverter. The circuit and the control method of this converter are discussed in detail. On the basis of above work, the converter is designed based on TMS320LF2407A DSP circuit. The converter is composed of the PV array, BOOST converter, full bridge inverter, drive circuit, controller, protection circuit. It can work under stand-alone mode and grid-connected mode according to the choice of user. The experimental results show the converter can work reliably under different weather and the converter builds a good base for future work of photovoltaic research.