土木(建工)2011届毕业设计任务书20110112(1)(8)

毕业设计任务书

Abstract

Wind Turbine directly drives three-phase permanent magnetic synchronous generator togenerate electricity in existing mall-scale wind power generation system. Then ncontrolled bridge changes the three-phase AC into DC which is used to charge the battery. The inverter turns DC from the battery into AC which is needed by load. The main problem in the existing system is that maximum power control is separate from charging and discharging control.

A power electronic interface between rectifier and battery is designed to improve the running performance of current small-scale wind power eneration system and solve the problems to a certain extent that available system has. The power electronic interface is composed of two modules. The first module is used for load power control .According to the relationship between wind energy and load power, it adjusts the power to automatically match or track load power point. The second one is the charging and discharging control module. The module is used to charge the battery correctly according to the charge curve.

A charge circuit is designed to rightly charge the battery when the output voltage of the Wind Power Generator is changed greatly.

Keywords：wind power generation; DC-DC converter; power point tracking;

constant voltage charging