交流励磁双馈风力发电机双PWM控制系统的仿真研究

在变速恒频风力发电系统追踪最大风能的过程中,双馈发电机将在同步速上下运行,这就要求交流励磁电源应有良好的输入、输出特性和能量双向流动的能力.本文在分析了其它变频器的情况下,提出了一种新型的双 PWM 变频器作为交流励磁变频器电源方案,详细地讨论了电压型双 PWM 变频器的工作原理与控制策略,并利用Matlab仿真软件对双PWM变频器件进行了仿真,研究结果表明这种变频器可以很好地满足交流励磁发电机变速恒频运行的要求.

Research of Simulation of AC Excitation Double-Feed Wind Generator Dual PWM Control System

In the process of tracing maximum wind-energy of a variable- speed constant-frequency wind-power generation system, the doubly-fed generator will operate below and above the synchronous speed, which requires the AC excitation power supply to possess excellent input and output performance and the hi-direction flowing ability of energy. In this paper, a voltage PWM converter is considered as a novel scheme of AC excitation power supply and its operation principle and control strategy are discussed in detail under the condition of analyzing other kinds of converter. Moreover, simulation study by Matlab software demonstrates that this kind of converter is capable of satisfying the variable-speed constant-frequency demands of an AC excitation wind-power generator.