1. Home
  2. TRID
  3. View Record
https://www.youtube.com/@nationalacademies/videos

ENERGY STORAGE AND ALTERNATIVES TO IMPROVE TRAIN VOLTAGE ON A MASS TRANSIT SYSTEM

The wide separation of substations in the Bay Area Rapid Transit system's transbay tunnel contributes to voltage sag when power demand is high. In the future, expansion to the system will exacerbate this problem by increasing traffic density. Typically, this situation is remedied through the installation of additional substations to increase the system's power capacity. The efficacy of several alternatives has been evaluated, specifically, installation of an 8 megajoule energy storage system, modification of the existing substations, or reduction of the resistance of the running rails or the third rail. To support this analysis, a simple model of the traction power system in the tunnel was developed. It was concluded that the storage system does not have sufficient capacity to deal with the expected voltage sags; in this application, the alternatives present more effective solutions. The potential impact of these system upgrades on expected future capital outlays by BART for traction power infrastructure has also been investigated. It was found that rail or substation upgrades may reduce the need for additional substations. These upgrades may also be effective on other parts of the BART system and on other traction power systems.

  • Supplemental Notes:
    • Sponsored by Department of Energy, Washington, DC.
  • Corporate Authors:

    Sandia National Laboratories

    P.O. Box 5800
    Albuquerque, NM  United States  87185
  • Authors:
    • GORDON, S P
    • Rorke, W S
  • Publication Date: 1995-4

Language

  • English

Media Info

  • Pagination: 66 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00719085
  • Record Type: Publication
  • Report/Paper Numbers: SAND-95-8222
  • Files: TRIS
  • Created Date: Mar 7 1996 12:00AM