Ground Loop Impedance of Long EHV Cable Lines

Teruo Ohno; Claus Leth Bak; Thomas K.  Sørensen

Ground Loop Impedance of Long EHV Cable Lines

Teruo Ohno, Claus Leth Bak, Thomas K. Sørensen

AAU Energy

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

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Abstract

The distance protection scheme without communication is often applied to the backup protection of EHV cable lines. For a reliable operation of a ground distance relay, the ground loop impedance of EHV cable lines needs to have a linear relationship to the distance from the relay location to the fault
location.
The discontinuity of the ground loop impedance at cross-bonding points may have an ill effect on the reliable operation of the ground distance relay. However, the cause and parameters of the discontinuity and its effects on the ground distance relay protection have not been discussed in literature.
Through the calculation of the ground loop impedance for cable lines, it has been found that, for long EHV cable lines, the reliable operation of the ground distance relay is possible with a typical relay setting. Effects of parameters, such as substation grounding, cable layouts and transposition, are also found
through the analysis.

Original language	English
Title of host publication	Proceedings of Western Protective Relay Conference 2012
Number of pages	12
Publication date	Oct 2012
Publication status	Published - Oct 2012
Event	Western Protective Relay Conference 2012 - Spokane, Washington, United States Duration: 16 Oct 2012 → 18 Oct 2012

Conference

Conference	Western Protective Relay Conference 2012
Country/Territory	United States
City	Spokane, Washington
Period	16/10/2012 → 18/10/2012

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@inproceedings{c578a2cecdcd4d48bb29cc7e806ffbf1,

title = "Ground Loop Impedance of Long EHV Cable Lines",

abstract = "The distance protection scheme without communication is often applied to the backup protection of EHV cable lines. For a reliable operation of a ground distance relay, the ground loop impedance of EHV cable lines needs to have a linear relationship to the distance from the relay location to the faultlocation.The discontinuity of the ground loop impedance at cross-bonding points may have an ill effect on the reliable operation of the ground distance relay. However, the cause and parameters of the discontinuity and its effects on the ground distance relay protection have not been discussed in literature.Through the calculation of the ground loop impedance for cable lines, it has been found that, for long EHV cable lines, the reliable operation of the ground distance relay is possible with a typical relay setting. Effects of parameters, such as substation grounding, cable layouts and transposition, are also foundthrough the analysis.",

author = "Teruo Ohno and Bak, {Claus Leth} and S{\o}rensen, {Thomas K.}",

year = "2012",

month = oct,

language = "English",

booktitle = "Proceedings of Western Protective Relay Conference 2012",

note = "Western Protective Relay Conference 2012 ; Conference date: 16-10-2012 Through 18-10-2012",

}

TY - GEN

T1 - Ground Loop Impedance of Long EHV Cable Lines

AU - Ohno, Teruo

AU - Bak, Claus Leth

AU - Sørensen, Thomas K.

PY - 2012/10

Y1 - 2012/10

N2 - The distance protection scheme without communication is often applied to the backup protection of EHV cable lines. For a reliable operation of a ground distance relay, the ground loop impedance of EHV cable lines needs to have a linear relationship to the distance from the relay location to the faultlocation.The discontinuity of the ground loop impedance at cross-bonding points may have an ill effect on the reliable operation of the ground distance relay. However, the cause and parameters of the discontinuity and its effects on the ground distance relay protection have not been discussed in literature.Through the calculation of the ground loop impedance for cable lines, it has been found that, for long EHV cable lines, the reliable operation of the ground distance relay is possible with a typical relay setting. Effects of parameters, such as substation grounding, cable layouts and transposition, are also foundthrough the analysis.

AB - The distance protection scheme without communication is often applied to the backup protection of EHV cable lines. For a reliable operation of a ground distance relay, the ground loop impedance of EHV cable lines needs to have a linear relationship to the distance from the relay location to the faultlocation.The discontinuity of the ground loop impedance at cross-bonding points may have an ill effect on the reliable operation of the ground distance relay. However, the cause and parameters of the discontinuity and its effects on the ground distance relay protection have not been discussed in literature.Through the calculation of the ground loop impedance for cable lines, it has been found that, for long EHV cable lines, the reliable operation of the ground distance relay is possible with a typical relay setting. Effects of parameters, such as substation grounding, cable layouts and transposition, are also foundthrough the analysis.

M3 - Article in proceeding

BT - Proceedings of Western Protective Relay Conference 2012

T2 - Western Protective Relay Conference 2012

Y2 - 16 October 2012 through 18 October 2012

ER -

Ground Loop Impedance of Long EHV Cable Lines

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Conference

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