Power quality event analysis in 25 kV 50 Hz AC railway system networks

Yljon Seferi, Paul Clarkson, Steven M. Blair, Andrea Mariscotti, Brian G. Stewart

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Abstract

Power quality (PQ) phenomena characterizing the voltage and current signals of railway electricity networks differ from those present in transmission and distribution electricity grids. Presently, there are no standardized procedures focused on PQ measurement techniques explicitly for railway applications. This paper evaluates whether the standard power quality measurement algorithms used in monitoring 50 Hz electrical grids are sufficient for an accurate evaluation and classification of PQ parameters of voltage dips, swells and interruptions present in 25 kV AC railways. An algorithm is presented to better characterize different types of interruption, distinguishing between causes due to network configuration or by other factors. For voltage dips and swells it is also shown that a smaller window size (less than 1 cycle) produces a more accurate estimate of the disturbance magnitude and duration. The two methods are verified against recorded signals of pantograph voltage and current. Recommendations are therefore provided for PQ measurement algorithms for AC railways.
Original languageEnglish
Title of host publication10th IEEE International Workshop on Applied Measurements for Power Systems
Subtitle of host publicationAMPS 2019
Place of PublicationPiscataway, NJ
PublisherIEEE
Number of pages6
Publication statusAccepted/In press - 2 Aug 2019
Event10th IEEE International Workshop on Applied Measurements for Power Systems: AMPS - E.On Energy Research Center - RWTH, Aachen University, Aachen, Germany
Duration: 25 Sep 201927 Sep 2019
https://amps2019.ieee-ims.org/

Conference

Conference10th IEEE International Workshop on Applied Measurements for Power Systems
CountryGermany
CityAachen
Period25/09/1927/09/19
Internet address

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Keywords

  • railway transportation power systems
  • power quality
  • power system transients,
  • voltage interruption

Cite this

Seferi, Y., Clarkson, P., Blair, S. M., Mariscotti, A., & Stewart, B. G. (Accepted/In press). Power quality event analysis in 25 kV 50 Hz AC railway system networks. In 10th IEEE International Workshop on Applied Measurements for Power Systems: AMPS 2019 Piscataway, NJ: IEEE.