Analytical calculation of the neutral point displacement voltage for high impedance earth faults in resonant earthed neutral systems

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CIRED 2019 - 531.pdf (835.21 KB)

Paper number

531

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Conference name

CIRED 2019

Conference date

3-6 June 2019

Conference location

Madrid, Spain

Peer-reviewed

Yes

Short title

Convener

Authors

Döring, Ludwig, Technische Universität Darmstadt, Germany
Braun, Benjamin, Technische Universität Darmstadt (TU DA), Germany
Böhme, Klaus, Siemens AG, Germany
Werben, Stefan, Siemens AG, Germany
Kereit, Matthias, Siemens AG, Germany
Hanson, Jutta, Technische Universität Darmstadt, Germany

Abstract

In most distribution systems in Central European countries isolated neutral and resonant earthed neutral is applied. For systems with such neutral point treatment the detection and localisation of a single-phase earth fault is the main challenge. The neutral point displacement voltage is used as a pick-up criterion in the majority of earth fault relays. This paper presents an analytical calculation of the neutral point displacement voltage in a resonant earthed neutral system in case of a single-phase earth fault. The calculation is used for a parameter analysis of the parameters of a resonant earthed neutral system. The results of the parameter analysis and implications for the operation of distribution systems are discussed. Furthermore, a new quantity for the evaluation of a single-phase earth fault in resonant earthed neutral systems is introduced.

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Publisher

AIM

Date

2019-06-03

Published in

CIRED 2019 Conference

Permanent link to this record

https://cired-repository.org/handle/20.500.12455/47
http://dx.doi.org/10.34890/99

ISSN

2032-9644

ISBN

978-2-9602415-0-1