Single-Stage Inverter Used In Grid-connected PV Station

Jiao Zaiqiang(Power Electronics and Electrical Drives) Directed by:Xu HonghuaThe inverter is the last or the only one power converter stage of grid-connected PV station, whose efficiency and reliability will influence the performance of the whole system. So an efficient inverter suited to the grid-connected PV station was presented in the thesis.By analyzing the character of grid-connected PV station and learning about the development of grid-connected inverter, the thesis realized the grid-connected invert and maximum peak power tracking in one power stage. According to the result of analysis, the parameters of components in the topology were decided. And then, A simulation was made by Psim and Saber. The topology of power is non-insulation full bridge, the control method is current hysteresis control, and algorithm of maximum peak power tracking is realized by 80C196. Through testing this equipment, it could be proved that this topology has really satisfied with the request of efficiency and reliability for grid-connected PV station.