In this paper

the principle and achievement method of composite switch based a kind of wireless communication technology is proposed. It’s hardware system mainly includes zero detection circuit

wireless communication module

MCU control and display circuit etc. The composite switch solves the problem of inrush and overvoltage during the switching of capacitor by AC contactor and the problem of big harmonics and power consumption in the switching of capacitor by thyristor and is more suitable for the place of switching capacitor. Wireless communication control mode in the design is used to switch the switch

which improves mobility of the equipment and keeps the equipment more flexible. Therefore

the composite switch switches with small power consumption

without harmonics and inrush current and with long operation life

has higher application value in the compensation of reactive power and wide application prospect.