一种用于冲击性负荷的动态无功功率补偿方法

A compensation method of dynamic reactive power for impact load

针对冲击性负荷造成的供电系统功率因数低、电压跌落和闪变等电能质量问题,提出了一种快速晶闸管投切电容器动态无功补偿方法。该方法采用基于改进瞬时无功理论的无功电流检测算法和新型不完全微分PID控制算法对冲击性负荷进行快速无功补偿。实验结果表明,该方法不仅可以提高系统功率因数,而且可以稳定变压器输出端电压,增强系统的控制精度和响应速度。

In view of power quality problems of low power factor,voltage dips and flicker of power system caused by impact load,a compensation method of dynamic reactive power with fast thyristor switched capacitor was put forward.The method adopts reactive current detection algorithm based on improved instantaneous reactive power theory and the new type of incomplete differential PID control algorithm to fastly compensate reactive of impact loads.The experimental results show that the method not only can improve power factor of the system,but also can stabilize voltage of the transformer output,enhance control precision and response speed of the system.