A NEW ELECTRIC POWER SUPPLY SYSTEM FOR ALTERNATING CURRENT LINES

NOVAJA SISTEMA ENERGOSNABSENIJA DLJA UCASTKOV PEREMENNOGO TOKA

The Soviet Railways are presently preparing a project for equipping a new line fed by alternating current supply with a 2 x 25 kV electric power supply system. The alternating current system now used on the electrified lines of the Soviet Union has nominal voltage of 25 kV for an average distance between sub-stations of 45-50 km. For the moment, this system does not affect line capacity. However, an increase of traffic in the future could have an effect both on voltage and on heating of catenary wires. The 2 x 25 kV system offers new possibilities for lines fed by alternating current. The essential characteristic of this system is that use is made of existing track and existing rolling stock which operates at a nominal voltage of 25 kV while electrical energy is sent to the motive power unit along 50 kV lines. The author explains the wiring diagram of the sysem described in the article. The calculations made by the Transelektroprojekt (Institute for projects for the electrification of transport modes) show that the distance between sub-stations can be increased to 100 km on the Soviet Railways. The 2 x 25 kV system does however have drawbacks. A special power supply wire with 25 kV insulation is necessary. A large number of line auto- transformers are required in traction sub-stations, etc. Therefore a certain number of problems remain to be solved before the 2 x 25 kV system can be applied. The solution will be found only when the first electrified line with the new system is put into operation.

  • Corporate Authors:

    Ministerstvo Putei Soobshcheniya SSSR

    Novoryazanskaya ul., Dom 12
    Moscow 288,   USSR 
  • Authors:
    • Borodulin, B M
  • Publication Date: 1974

Language

  • Russian

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00095374
  • Record Type: Publication
  • Source Agency: International Railway Documentation, Selection of
  • Files: TRIS
  • Created Date: Jul 15 1975 12:00AM