Title :
Communications systems for protective relaying
Author :
Adamiak, Mark ; Redfern, Miles
fDate :
7/1/1998 12:00:00 AM
Abstract :
In normal power system operation, a variety of communications links are used to provide this information transfer, including: pilot wire channels operated by the power utility; pilot circuits rented from national communications utilities; power line carrier over the transmission lines; radio channels operating either at very high frequencies or over microwave; and optical fiber communications systems. These schemes were originally intended for electromechanical and static analog relays but have subsequently been applied to digital relays. Following a description of the ISO communications model, these communication links are discussed. Modulation techniques, asynchronous and synchronous communication, error detection, and protocols and profiles are also discussed
Keywords :
carrier transmission on power lines; error detection; optical fibre communication; power system protection; protocols; radio links; relay protection; ISO communications model; asynchronous communication; communications links; digital relays; error detection; information transfer; microwave communication; modulation techniques; national communications utilities; optical fiber communications; pilot circuits; pilot wire channels; power line carrier; power system operation; power utility; protective relaying; protocols; radio channels; synchronous communication; transmission lines; very high frequencies; Digital relays; Distributed parameter circuits; Microwave circuits; Microwave communication; Power system protection; Power system relaying; Power transmission lines; Protective relaying; VHF circuits; Wire;
Journal_Title :
Computer Applications in Power, IEEE
