Power-line communication (PLC) is a communication method that uses electrical wiring to simultaneously carry both data, and Alternating Current (AC) electric power transmission or electric power distribution. It is also known as power-line carrier, power-line digital subscriber line (PDSL), mains communication, power-line telecommunications, or power-line networking (PLN).
The power line is transformed into a data line via the superposition of a low energy information signal to the power wave. Since electricity is 50 or 60 Hz, data is transmitted at at least 3 kHz to ensure that the power wave does not interfere with the data signal.
Power-line carrier communication (PLCC) is mainly used for telecommunication, tele-protection and tele-monitoring between electrical substations through power lines at high voltages, such as 110 kV, 220 kV, 400 kV. This can be used by utilities for advanced energy management techniques (such as OpenADR and OpenHAN), fraud detection and network management, automatic meter reading (AMR), advanced metering infrastructure, demand side management. load control, and demand response.