ScholarLens Back to search
1978•IEEE Transactions on Power Apparatus and SystemsRequires access

Ultra High Speed Relay for EHV/UHV Transmission Lines -- Installation-Staged Fault Tests and Operational Experience

Moon Tom Yee, J. Esztergalyos

Open publisher page 42 citations

Abstract

A new protective relay that solves many of the problems associated with the protection of EHV systems has been developed by ASEA, Sweden. Based on a traveling wave approach the relay system operates at ultra-high speed and can detect and determine the direction to a fault within a few milliseconds. The first relay system was installed in Wonneville Power Administration's (BPA) 500 kV system in April 1976. It represents a substantial contribution to BPA's present effort to shorten fault clearance times. The relay's setting procedure is described. The outcome of staged fault tests and one year's operational experience is presented and has confirmed the validity of the relay concept showing an ultra-high speed performance consistent with earlier laboratory results, with operating times of two to six milliseconds.

About this research paper

What this paper is about

A new protective relay that solves many of the problems associated with the protection of EHV systems has been developed by ASEA, Sweden. Based on a traveling wave approach the relay system operates at ultra-high speed and can detect and determine the direction to a fault within a few milliseconds. The first relay system was installed in Wonneville Power Administration's (BPA) 500 kV system in April 1976. It represents a substantial contribution to BPA's present effort to shorten fault clearance times. The relay's setting procedure is described. The outcome of staged fault tests and one year's operational experience is presented and has confirmed the validity of the relay concept showing an ultra-high speed performance consistent with earlier laboratory results, with operating times of two to six milliseconds.

Why it matters

OpenAlex reports 42 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

A new protective relay that solves many of the problems associated with the protection of EHV systems has been developed by ASEA, Sweden. Based on a traveling wave approach the relay system operates at ultra-high speed and can detect and determine the direction to a fault within a few milliseconds. The first relay system was installed in Wonneville Power Administration's (BPA) 500 kV system in April 1976. It represents a substantial contribution to BPA's present effort to shorten fault clearance times. The relay's setting procedure is described. The outcome of staged fault tests and one year's operational experience is presented and has confirmed the validity of the relay concept showing an ultra-high speed performance consistent with earlier laboratory results, with operating times of two to six milliseconds.

Key concepts: Relay, Protective relay, Fault (geology), Engineering, Electric power system, Electrical engineering, Solid-state relay, Digital protective relay

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Ultra High Speed Relay for EHV/UHV Transmission Lines -- Installation-Staged Fault Tests and Operational Experience — Research Paper | ScholarLens