NEW PROSPECTIVES FOR DIGITAL PROTECTIONS OF THE 3 KV DC ELECTRIC TRACTION LINES

The increase of currents through lines in normal rail operation in Italy, caused by the increase of train traffic and of the power absorption of the trains, especially the new high-speed trains, has led to a condition such that the intensity of the currents in normal operation is approaching the same order of magnitude of that for faults located in positions far from the end stations. It is therefore a difficult task to discriminate between a faulty situation and that of a temporary high load condition. The addition to the maximum current protection relays of devices sensitive to the derivative of the current has not solved this problem in many practical cases. This paper presents the results of a study performed by experimental tests and numerical simulations designed to analyze the possibility of applying the new technique of the digital relays for the protection of the lines under consideration and introduces a proposal for a new digital protection system.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/1853128260
• Corporate Authors:

  WIT Press

  Ashurst Lodge
  Ashurst, Southampton  United Kingdom  SO40 7AA
• Authors:
  • Cinieri, E
  • Cosmi, S
  • Fumi, A
  • Salvatori, V
  • Torto, W
• Conference:
  • Seventh International Conference on Computers in Railways. Computers in Railways VII
  • Location: Bologna, Italy
  • Date: 2000-9-11 to 2000-9-13
• Publication Date: 2000

Language

• English

Media Info

• Features: Figures; Tables;
• Pagination: p. 587-598
• Monograph Title: COMPUTERS IN RAILWAYS VII
• Serial:
  • Publication of: WIT Press
  • Publisher: WIT Press
  • ISSN: 1462-6101

Subject/Index Terms

• TRT Terms: Circuit breakers; Direct current; Electric current; Experiments; Fault location; Fault monitoring; High speed rail; Rail transit; Railroad electrification; Railroads; Relays (Electricity); Sensors; Short circuits; Simulation; Voltage regulation
• Candidate Terms: Electric traction
• Uncontrolled Terms: Digital relays
• Geographic Terms: Italy
• Subject Areas: Public Transportation; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00800742
• Record Type: Publication
• ISBN: 1853128260
• Contract Numbers: BRPR-CT97-D558, DG 12 HINS, KBN No. 9 T12C 045 1
• Files: TRIS
• Created Date: Oct 30 2000 12:00AM