Communications systems for protective relaying

Author

Adamiak, Mark ; Redfern, Miles

Volume

11

Issue

3

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

14

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;

fLanguage

English

Journal_Title

Computer Applications in Power, IEEE

Publisher

ieee

ISSN

0895-0156

Type

jour

DOI

10.1109/67.694931

Filename

694931