KSTSC low-voltage dynamic tuning compensation device is an upgraded product of traditional reactive power compensation. Through the special intelligent control unit (KSCT/T) for reactive power compensation, the unique zero-crossing switching technology is used to control the high-power thyristor module (KSTSM) switching tuning Capacitive reactor group (KSLC), for dynamic reactive power compensation; to improve the system voltage stability, the power factor is increased to above 0.95, to achieve the purpose of improving power quality.