Title :
Evaluation of the potential for power line carrier (PLC) to interfere with use of the Nationwide Differential GPS network
Author :
Silva, J. Michael ; Whitney, Bruce
Author_Institution :
Enertech Consultants, Campbell, CA, USA
fDate :
4/1/2002 12:00:00 AM
Abstract :
Power line carrier (PLC) is an important technique used extensively on electric power lines for communication and telemetry. PLC uses signals in the 40-490 kHz range that couple to and propagate over power line conductors. Applications of PLC include protective relaying, telemetering, voice communications, supervisory control, etc. The new Nationwide Differential Global Positioning System (NDGPS) network uses the 283.5-325 kHz band to broadcast GPS correction messages throughout the world, and some PLC transmitters may operate in this band. Limited work has been done to either measure or model the electromagnetic fields associated with PLC operation and some of these studies demonstrate the potential for PLC fields close to power lines to degrade navigation signal receiver performance. This paper presents PLC field strength measurements, describes NDGPS signal structure, and recommends frequency separation as the best approach to mitigation for potential PLC interference to NDGPS receivers operated near to power lines
Keywords :
Global Positioning System; carrier transmission on power lines; interference (signal); power overhead lines; 40 to 490 kHz; Nationwide Differential GPS Network; PLC transmitters; communication; electromagnetic fields; field strength measurements; interference; navigation signal receiver performance degradation; power line carrier; power line conductors; protective relaying; signal structure; supervisory control; telemetering; telemetry; voice communications; Broadcasting; Conductors; Electromagnetic measurements; Global Positioning System; Power measurement; Programmable control; Protective relaying; Supervisory control; Telemetry; Transmitters;
Journal_Title :
Power Delivery, IEEE Transactions on
