Power Line Carrier for Power Telemetering

This paper presents an application of power line carrier (PLC) for electrical power telemetering. This system has a special capability of transmitting the measured values to a centralized computer via power lines. The PLC modem as a passive high-pass filter is designed for transmitting and receiving information. Its function is to send the information carrier together with transmitted data by superimposing it on the 50 Hz power frequency signal. A microcontroller is employed to function as the main processing of the modem. It is programmed for PLC control and interfacing with other devices. Each power meter, connected via a PLC modem, is assigned with a unique identification number (address) for distinguishing each device from one another.

Authors:

• Tosaphol Ratniyomchai
• Uthai Jaithong
• Thanatchai Kulworawanichpong

Keywords:

• Power telemetering
• Power line carrier
• High-passfilter
• Digital data transmission

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