摘要
介绍了基于自关断器件的脉宽调制(PWM)三相静止无功补偿器的原理,分析了开关占空比和补偿器等效电导之间的关系。根据不平衡三相负荷的平衡化原理,计算补偿器各相开关的占空比,实现对三相不平衡负载的平衡化补偿,仿真结果证明了基于自关断器件的PWM型三相静止无功补偿器不平衡负载补偿的有效性。
The operation principle of three-phase static var compensator based on pulse width modulation （PWM） with load balancing ability is presented. The relationship between equivalent inductance and duty cycle is analyzed. Each phase of the proposed SVC based on PWM can be controlled individually. So it has the ability of load balancing. According to Steinmetz theory, the duty cycle for unbalanced load compensation is deduced. Simulation results verify the validity and feasibility of the proposed compensator. Simulation results show the effectiveness of unbalanced load compensation of PWM type static-var compensators based on self shutoff elements.
出处
《江苏电机工程》
2007年第1期39-42,共4页
Jiangsu Electrical Engineering
关键词
电力电子
无功补偿
静止无功补偿器
脉宽调制
power electronics
reactive power compensation
static-var compensator
pulse width modulation （PWM）
