High-pressure TSC dynamic reactive power compensation device consists of fiber trigger control system, valve control system, pulse transformer, reactor, capacitor, protect components etc unit combination becomes. Control system consists of computer real-time detection of power quality, achieve intelligent investment, excision of capacitors regulation system of power factor purpose. When controller testing real-time power factor, automatic judge the need to input the number of capacitors, controller of designated thyristor valve control signal output and conduction will hv capacitor is put into operation, When load reactive power below the setting ＆#118alue, the controller of the corresponding thyristor valves to discontinue sending triggered signals, thyristor valve conduction deadline, capacitor set out of service. Above working status fully automatic, ensure no impact on the pitch cut capacitor, no inrush current, without transition process