摘要
永磁直驱风力发电系统与双馈交流励磁风力发电系统相比较,具有结构简单、发电效率及运行可靠性高等优点。采用"不控整流+升压斩波+PWM逆变"的变流技术,推导了发电机转速变化和DC/DC环节上功率开关器件占空比变化之间的关系,研究了利用占空比调节来进行最大功率点跟踪的新方法。该系统可实现最大风能跟踪控制以及变速恒频发电运行,并对系统进行了仿真和实验,实验结果证明了系统的可行性和正确性。
Compared with the double-feed AC excited wind-power generation system, the direct-driven permanent magnet synchronous wind-power generation system possesses such features as simple structure, high generation efficiency and good operation reliability. The ＂uncontrollable rectifier ＋ boost chopper ＋ PWM converter＂ are adopted in conversion system. The relationship between duty cycle variation of power switch elements in a DC/DC link and variation of generator speed is analyzed. A new method for adjusting the duty cycle variation for maximum power point tracking is tested. Using the pro- posed generation system, the maximum Wind-energy tracking control as well as the variable speed constant frequency （VSCF） power generation can be implemented. The simulation and Experiment results have been carried out to verify the feasibility and correction of the proposed system.
出处
《现代电子技术》
2011年第4期201-203,207,共4页
Modern Electronics Technique
关键词
永磁直驱
风力发电
最大功率点跟踪
PWM逆变
permanent magnet direct-driven
wind power generation
maximum power point tracking
PWM converter
