Design and implementation of a digital power converter for wind energy conversion

This paper presents the design and implementation of power converter for wind generator. The proposed system consists of a wind generator, a buck converter, a bi-directional dc/dc converter and lead-acid battery. The wind generator is the main power source of the system, and the battery is used for energy storage and power compensation. In order to make the wind power generator produce the maximum power, the battery is charged or discharged through the bi-directional dc/dc converter. By adjusting the duty of the power converter, the charging efficiency of batteries can be improved. A digital signal processor is used to realize the system controller. The system controls the duty cycle of the buck converter to accomplish the maximum power tracking. Finally, a 100W wind energy conversion system is built and experimental results are provided to verify theoretical analysis and feasibility of the wind power conversion system.