Method, device and system for transmitting information in PLC network

The embodiment of the invention discloses a method, a device and a system for transmitting information in a PLC network, which are used for transmitting information. The switch control device comprises a switch and a coupling circuit, the coupling circuit is connected with the two ends of the switch in parallel, and when the switch is switched off, the coupling circuit transmits a first power line communication PLC signal to gateway equipment. The embodiment of the invention further provides an information transmission method. According to the embodiment of the invention, when the switch is switched off, the PLC signal is sent to the gateway equipment, and the information of power failure, tripping and the like is reported to the gateway equipment. 本申请实施例公开了一种PLC网络中信息传输的方法、装置和系统，用于传输信息。本申请实施例开关控制装置包括开关以及耦合电路，耦合电路与开关两端并联，当开关断开时，耦合电路向网关设备传输第一电力线通信PLC信号。本申请实施例还提供一种信息传输的方法。本申请实施例能够在开关断开时，向网关设备发送PLC信号，并向网关设备上报停电、跳闸等信息。