本文提出了一种用晶闸管开关装置———串联变压器改变电容端电压调节无功的补偿方法。阐明了这种补偿装置原理 ,分析了装置功率特性 ;估计了晶闸管开关换接过程的断态过电压和过电流大小 ,指出了降低这种过电压和过电流技术实现完全可能。并以实例和TSC进行了比较 ,指出了这种装置成本要比TSC低得多 ,宜于在高压电网中使用。 This paper presents a thyristor switching device --- series transformer to change the capacitor voltage regulator reactive power compensation method. The principle of this compensation device is clarified, and the power characteristics of the device are analyzed. The off-state over-current and over-current of the thyristor switching process are estimated. It is pointed out that it is possible to reduce this over-voltage and over-current technology. And compared with the example and the TSC, pointed out that the cost of this device is much lower than the TSC, suitable for use in the high voltage grid.