摘要
为了研究双馈风力发电系统的双脉宽调制(PWM)变流器的控制策略,分析了双PWM变流器的主电路拓扑,建立了基于三相静止坐标系和两相同步旋转坐标系的数学模型,给出了变流器的电压矢量控制方案。研究了电压空间矢量脉宽调制(SWPWM)技术,并利用逻辑函数的卡诺图化简法来判断扇区。在Matlab/Simulink环境下对其进行了仿真研究,其结果表明双PWM变流器是理想的励磁变频电源。
Aiming at studying the control strategy of back-to-back pulse width modulation （PWM） converter in wind-power doubly-fed induction generator system, the topological structure of back-to-back PWM was analyzed, and mathematical models of the converter were created based on the three-phase static coordinate and the two-phase synchronous rotational coordinate. The principle of the space vector pulse width modulation（SVPWM） was studied. And the sectors were determined by using Karnaugh map simplification method of logic function. Simulation was carried out under the environment of Matlab/Simulink. The results verify that the three-phase VSR can provide sinusoidal input current with unity power factor.
出处
《机电工程》
CAS
2009年第8期93-96,共4页
Journal of Mechanical & Electrical Engineering
关键词
双脉宽调制变流器
矢量控制
逻辑函数化简
空间矢量脉宽调制
back-to-back pulse width modulation（PWM） converter
vector control
logic function
space vector pulse width modulation （ SVPW M ）
