A Novel Ground Fault Identification Method for 2 x 5 kV Railway Power Supply Systems

Serrano, Jesús and Platero Gaona, Carlos Antonio and López-Toledo, Máximo and Granizo Arrabé, Ricardo (2015). A Novel Ground Fault Identification Method for 2 x 5 kV Railway Power Supply Systems. "energies", v. 8 (n. 7); pp. 7020-7039. ISSN 1996-1073. https://doi.org/10.3390/en8077020.

Description

Title: A Novel Ground Fault Identification Method for 2 x 5 kV Railway Power Supply Systems
Author/s:
  • Serrano, Jesús
  • Platero Gaona, Carlos Antonio
  • López-Toledo, Máximo
  • Granizo Arrabé, Ricardo
Item Type: Article
Título de Revista/Publicación: energies
Date: 13 July 2015
ISSN: 1996-1073
Volume: 8
Subjects:
Freetext Keywords: ground faults; protection; 2 × 25 kV; fault location; railways
Faculty: E.T.S.I. Industriales (UPM)
Department: Automática, Ingeniería Eléctrica y Electrónica e Informática Industrial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The location of ground faults in railway electric lines in 2 × 5 kV railway power supply systems is a difficult task. In both 1 × 25 kV and transmission power systems it is common practice to use distance protection relays to clear ground faults and localize their positions. However, in the particular case of this 2 × 25 kV system, due to the widespread use of autotransformers, the relation between the distance and the impedance seen by the distance protection relays is not linear and therefore the location is not accurate enough. This paper presents a simple and economical method to identify the subsection between autotransformers and the conductor (catenary or feeder) where the ground fault is happening. This method is based on the comparison of the angle between the current and the voltage of the positive terminal in each autotransformer. Consequently, after the identification of the subsection and the conductor with the ground defect, only the subsection where the ground fault is present will be quickly removed from service, with the minimum effect on rail traffic. This method has been validated through computer simulations and laboratory tests with positive results.

More information

Item ID: 40756
DC Identifier: http://oa.upm.es/40756/
OAI Identifier: oai:oa.upm.es:40756
DOI: 10.3390/en8077020
Official URL: http://www.mdpi.com/1996-1073/8/7/7020
Deposited by: Memoria Investigacion
Deposited on: 06 Jun 2016 09:25
Last Modified: 18 Dec 2018 07:52
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