Characteristics of earth faults in electrical distribution networks with high impedance earthing

Seppo Hänninen (Corresponding Author), Matti Lehtonen

Research output: Contribution to journalArticleScientificpeer-review

102 Citations (Scopus)

Abstract

This paper presents an analysis and comparison of earth fault characteristics in the medium voltage distribution networks (20 kV) with high impedance earthing.
The results presented are based on the evaluation of 476 real case data recordings, obtained from substations of distribution networks with an unearthed or a compensated neutral during the observation period of 3 years, 1994–1996.
The networks were mainly of overhead construction, with a smaller share of underground cables. In the occurrence of disturbances, the traces of phase currents and voltages and neutral currents and voltages were recorded at two feeders at two substations.
The study dealt with the clearing of earth faults, relation between short circuits and earth faults, arc extinction, arcing fault characteristics, appearance of transients and magnitudes of fault resistances.
The results contribute to various developments of distribution automation and protection systems.
Original languageEnglish
Pages (from-to)155-161
JournalElectric Power Systems Research
Volume44
Issue number3
DOIs
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed

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Electric grounding
Electric power distribution
Earth (planet)
Electric potential
Underground cables
Data recording
Short circuit currents
Automation

Cite this

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title = "Characteristics of earth faults in electrical distribution networks with high impedance earthing",
abstract = "This paper presents an analysis and comparison of earth fault characteristics in the medium voltage distribution networks (20 kV) with high impedance earthing. The results presented are based on the evaluation of 476 real case data recordings, obtained from substations of distribution networks with an unearthed or a compensated neutral during the observation period of 3 years, 1994–1996. The networks were mainly of overhead construction, with a smaller share of underground cables. In the occurrence of disturbances, the traces of phase currents and voltages and neutral currents and voltages were recorded at two feeders at two substations. The study dealt with the clearing of earth faults, relation between short circuits and earth faults, arc extinction, arcing fault characteristics, appearance of transients and magnitudes of fault resistances. The results contribute to various developments of distribution automation and protection systems.",
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Characteristics of earth faults in electrical distribution networks with high impedance earthing. / Hänninen, Seppo (Corresponding Author); Lehtonen, Matti.

In: Electric Power Systems Research, Vol. 44, No. 3, 1998, p. 155-161.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Characteristics of earth faults in electrical distribution networks with high impedance earthing

AU - Hänninen, Seppo

AU - Lehtonen, Matti

PY - 1998

Y1 - 1998

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AB - This paper presents an analysis and comparison of earth fault characteristics in the medium voltage distribution networks (20 kV) with high impedance earthing. The results presented are based on the evaluation of 476 real case data recordings, obtained from substations of distribution networks with an unearthed or a compensated neutral during the observation period of 3 years, 1994–1996. The networks were mainly of overhead construction, with a smaller share of underground cables. In the occurrence of disturbances, the traces of phase currents and voltages and neutral currents and voltages were recorded at two feeders at two substations. The study dealt with the clearing of earth faults, relation between short circuits and earth faults, arc extinction, arcing fault characteristics, appearance of transients and magnitudes of fault resistances. The results contribute to various developments of distribution automation and protection systems.

U2 - 10.1016/S0378-7796(97)01193-0

DO - 10.1016/S0378-7796(97)01193-0

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VL - 44

SP - 155

EP - 161

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JF - Electric Power Systems Research

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