DC PLC PV rapid shutdown device circuit based on SunSpec communication protocol

A DC PLC PV rapid shutdown device circuit based on SunSpec communication protocol comprises a PV module, which comprises PV+ and PV− output ports, wherein the DC PLC PV rapid shutdown device circuit is based on SunSpec communication protocol is characterized in that:

• the DC PLC PV rapid shutdown device circuit comprises an output capacitor Cout, one end of the output capacitor Cout is connected to PV+ or PV− port through an electric switch, the other end of the output capacitor Cout is connected to PV− or PV+ port, two ends of the output capacitor Cout are respectively connected to OUT+ and OUT−, and PV− is grounded;
• the DC PLC PV rapid shutdown device circuit comprises a power inductor L1, one end of the power inductor L1 is connected to OUT−, and the other end thereof is grounded;
• the power inductor L1 is connected with a resonant capacitor C1 and an impedance resistor R2 in parallel;
• the DC PLC PV rapid shutdown device circuit comprises a blocking capacitor C2 and a blocking capacitor C3, one end of the blocking capacitor C2 is used as the PLC+ port, and the other end of the blocking capacitor C2 is connected to a ground terminal of the power inductor L1;
• one end of the blocking capacitor C3 is used as the PLC− port, and the other end of the blocking capacitor C3 is connected to the end where the power inductor Li is connected with OUT−;
• and
• signal sources are connected to OUT+ and OUT− in parallel and send “Keep Alive” signals based on SunSpec communication protocol;
• wherein the DC PLC PV rapid shutdown device circuit also comprises a control IC, PLC+ port and PLC− port are connected to a signal coupling input port of the control IC, a signal control terminal of the control IC is connected with the electric switch to control the electric switch, and PV+ is connected with the control IC and supplies power to the control IC.