Measurement and analysis of zero sequence current levels during normal operation

Sjoerd Nauta, Jeroen B.M. van Waes, Kees Koreman, Frans Provoost, Maarten van Riet, Ramiro Serra

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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.
Original languageEnglish
Title of host publicationMeasurement and analysis of zero sequence current levels during normal operation
DOIs
Publication statusPublished - 2019
Event25th International Conference and Exhibition on Electricity Distribution, (CIRED 2019) - IFEMA, Madrid, Spain
Duration: 3 Jun 20196 Jun 2019
Conference number: 25
http://www.cired2019.org

Conference

Conference25th International Conference and Exhibition on Electricity Distribution, (CIRED 2019)
Abbreviated titleCIRED 2019
CountrySpain
CityMadrid
Period3/06/196/06/19
Internet address

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