论文部分内容阅读
空间矢量脉宽调制(SVPWM)和单周控制(one-cycle control)是目前最常见的两种脉宽调制(PWM)技术。传统观点认为,它们是不同的PWM发生技术,即相同的参考波得到的触发脉冲不相同。文中以四桥臂STATCOM的主电路结构为例,经过数学推导,证明了下述结论:就二者发出的触发脉冲的结果而言,SVPWM与单周控制算法是等效的,而且单周控制的计算代价明显小于SVPWM。此外,通过对一个由清华大学独立研制的四桥臂STATCOM进行仿真,对理论结果进行了验证。进一步解释了这两种PWM技术的物理本质,进而推出所有的PWM方法经过适当的控制,都可以得到相同的触发脉冲。
Space vector pulse width modulation (SVPWM) and one-cycle control are the two most common pulse-width modulation (PWM) technologies available today. The traditional view that they are different PWM generation technology, that is, the same reference pulse obtained by the trigger pulse is not the same. Taking the main circuit structure of four-leg STATCOM as an example, the mathematic derivation proves the following conclusion: SVPWM is equivalent to the one-cycle control algorithm in terms of the triggering pulse of both, and the one-cycle control The computational cost is significantly less than SVPWM. In addition, by simulating a four-leg STATCOM independently developed by Tsinghua University, the theoretical results were verified. To further explain the physical nature of these two PWM techniques, and then introduce all PWM methods have been properly controlled, can get the same trigger pulse.