NDLI: Improved relay coordination and relay response time by integrating the relay functions

Content Provider	IEEE Xplore Digital Library
Author	Kojovic, L.A. Witte, J.F.
Copyright Year	2000
Description	Author affiliation: Cooper Power Syst., Franksville, WI, USA (Kojovic, L.A.)
Abstract	This paper describes a practical method for improving relay coordination for high current faults by reducing the relay operating times by integrating the relay functions. This results in reduced fault duration at high currents, which minimizes equipment damage. Two examples of relay coordination for a typical distribution system using traditional relays, reclosers and new universal relays are presented. A protection scheme with integrated relay functions has been implemented in a new universal protective relay, which includes modular hardware and software components that can be combined into numerous configurations. It integrates protection, metering, control, communication and programmable logic control (PLC) into a single device. The hardware platform makes it possible to manipulate input voltage and current samples through different algorithms to obtain quantities such as phasors, symmetrical components and frequency. When the quantities are combined, the relay makes faster and more accurate decisions about faults in the system.
Starting Page	1202
Ending Page	1207
File Size	629879
Page Count	6
File Format	PDF
ISBN	0780364201
DOI	10.1109/PESS.2000.867550
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-07-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Delay Protective relaying Protection Hardware Communication system control Programmable control Logic devices Programmable logic arrays Programmable logic devices
Content Type	Text
Resource Type	Article

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