Abstract:Current reactive power compensation device to thyristor switch, air switch, the control unit and condenser fragmented along the power distribution cabinet.Using the controller to control multiple capacitors, if the controller fails, the whole device will not be able to run normally.To this end, we design a dsPIC based intelligent reactive power compensation device, device hardware architecture is given, mainly dsPIC6014A control chip for three-phase voltage, current sampling, through the FFT method and electric parameters, basis for capacitors for reactive power control.Give dsPIC chip principle, this paper introduces the network information data acquisition circuit, zero switching on-off switch circuit, thyristor driving circuit and magnetic relay drive circuit., and the device of the main program flow chart and the hardware circuit of common intelligent reactive power compensation device of the various functions.The experimental result shows that the design of the intelligent reactive power compensation device compensation effect is good, high performance.