基于PWM控制可调电压源的无功动态补偿技术研究

提出一种新型的可连续调节电容的动态无功补偿技术。将脉宽调制（PWM）型AC_Buck变换器与隔离变压器相结合,通过控制AC_Buck电压变换器的输出电压直接调节补偿电容器上的电压,进而使补偿器能输出连续变化的容性无功。该方案控制简单,动态响应速度快,不产生低次谐波,电压变换器的容量仅为补偿电容容量的25%。最后通过实验验证了其可行性和有效性。

Research on the Technique of Dynamic Reactive Power Compensation Based on the PWM Control Variable Voltage Source

This paper proposals a novel technique of dynamic reactive power compensation,which can adjust capacitor continuously.The proposed compensator combines the PWM type AC_Buck converter with the transformer to adjust the voltage on the compensating capacitor directly.So the continuous output of reactive power is realized.The compensator has fast dynamic response,and produces no subharmonic.The capacity of the transformer is only 25%of that of the compensating capacitor.Experimental results verify the feasibility and effectiveness of the compensator.