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

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    CIRED 2019 - 1229.pdf (553.4Kb)
    Paper number
    1229
    Conference name
    CIRED 2019
    Conference date
    3-6 June 2019
    Conference location
    Madrid, Spain
    Peer-reviewed
    Yes
    Metadata
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    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.
    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

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