Calculations of induced voltage and noise voltage in metallic communications cables have traditionally been undertaken using relatively simple methods based upon the explicit solution of transmission line equations. These methods were generally developed about 40 years ago with emphasis on AC railways using direct rail return, for communications cables which had metallic outer sheats in continuous contact with the ground. This paper reviews the limitations of this classical approach, and introduces an alternative computer-based numerical method for undertaking such calculations. This permits a realistic representation of the power system using auto-transformers, booster transformers or direct rail-return, as well as a means of calculating accurate longitudinal and psophometric voltages with the point connected earth-rod arrangements commonly used to provide electromagnetic screening.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Induced noise calculations in AC railways using CAD techniques


    Additional title:

    Berechnung von induzierten Geraeuschen bei Eisenbahn-Wechselstromsystemen mittels CAD-Verfahren


    Contributors:
    Mellitt, B. (author) / Goodman, C.J. (author) / Shao, Z.Y. (author) / Johnston, W.B. (author)


    Publication date :

    1987


    Size :

    6 Seiten, 11 Bilder, 3 Tabellen, 3 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Direct-current feeder calculations for railways

    Engineering Index Backfile | 1907




    The noise of street railways

    Engineering Index Backfile | 1897


    Noise reduction projects within Netherlands Railways

    Dings, P. / European Acoustics Association / East-European Acoustical Association et al. | British Library Conference Proceedings | 1998