Measurement and analysis of zero-sequence current levels during normal operation

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CIRED 2019 - 1229.pdf (553.44 KB)

Paper number

1229

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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

Nauta, Sjoerd, Alliander, Netherlands
Serra, Ramiro, TU Eindhoven, Netherlands
van Waes, Jeroen , TenneT TSO B.V., Netherlands
Provoost, Frans, Alliander, Netherlands
van Riet, Maarten, Alliander, Netherlands
Koreman, Kees, TenneT TSO B.V., Netherlands

Abstract

In the Netherlands, power grids and railway systems are located in close proximity over considerable lengths. Zero-sequence currents in the transmission grid may have an influence on neighbouring systems through inductive coupling. Not much is known about these currents during normal operation: Literature on the topic is scarce and modelling is complicated for various reasons.Several measurements were analysed to obtain insight in 150 kV and 380 kV branches. Both PMU measurements and measurements using the secondary wiring of current transformers were used. The results are presented in this paper. The paper also presents a measurement uncertainty analysis. on the reconstruction of zero-sequence currents for both measurement types, indicating the influence of the measurement principles.The considered measurements show several types of correlation between positive-sequence and zero-sequence currents.The 150 kV measurements show constant zero-sequence currents that do not vary with increasing positive-sequence currents.Three of the 380 kV branches show an increase of zero-sequence currents as positive-sequence currents increase.All measured zero-sequence currents that have been observed are below the values used in the interference studies.

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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/20.500.12455/351
http://dx.doi.org/10.34890/577

ISSN

2032-9644

ISBN

978-2-9602415-0-1