POWER AUTOMATION NETWORKING SYSTEM USING PLC

A power automation networking system using PLC(Power Line Communication) is provided to prevent signal collision while transmitting communication signals to every line by detecting whether an operation device is operated or not through a terminal unit and limiting the operation of a coupler accordingly. A transmitting device(100) controls a flow of signal data and the operation of elements of a system. The first and second couplers(210,220) convert a communication signal into an electrical signal and transmit it to a distribution system through a power line. An operation device(300) supplies or cuts off power distributed to the system in preparation of a failure such as a short circuit. A FRTU(Feeder Remote Terminal Unit)(400) detects whether the operation device(300) is operated or not by exchanging data with a central server and measures a distribution state.