NDLI: A Current Differential Relay for a 1000-kV UHV Transmission Line

Content Provider	IEEE Xplore Digital Library
Author	Xu, Z.Y. Du, Z.Q. Ran, L. Wu, Y.K. Yang, Q.X. He, J.L.
Copyright Year	1986
Abstract	This paper describes the principle of a new current differential relay developed for a 1000-kV UHV transmission line that is being constructed in China. The distributed capacitive current along the relatively long overhead line will have a significant effect on the relay performance and should be taken into account in the relay principle. The study results in a new current differential relay based on the steady state transmission line equations, in which the distributed capacitive current is inherently represented. Analysis is carried out for different practical situations where shunt reactors or series capacitors are present in the system for compensation. Laboratory tests show that the relay principle developed in this study can be used as a main protection scheme for the 1000-kV UHV transmission line.
Sponsorship	IEEE Power Engineering Society
Starting Page	1392
Ending Page	1399
Page Count	8
File Size	939578
File Format	PDF
ISSN	08858977
Volume Number	22
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Transmission lines Steady-state Differential equations Shunt (electrical) Inductors Capacitors Laboratories Testing Protective relaying transmission line equations 1000-kV UHV transmission line current differential relay distributed parameters
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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