The Westside and Hillsboro Light Rail extensions in Portland, Oregon, USA, were open for revenue service in September, 1998. The 18-mile extensions extend the existing Eastside line rail service from downtown Portland to downtown Hillsboro. The alignment includes at-grade street crossings, street-running operation, several fully grade separated sections and a 3-mile tunnel. Primary power is provided by the utilities at 12.5 kV and rectified by 18 mainline traction power substations to deliver 750 DC power to the light rail vehicles. Each substation has three separate grounding systems: (a) an AC ground mat designed per IEEE Std 80-1986 for safe step and touch potentials; (b) a DC ground mat for DC surge arrestor ground; the DC switchgear enclosure is connected to the DC ground mat through a low-resistance grounding scheme; and (c) an isolated ground rod for the utility incoming shields. This paper provides a detailed technical description including grounding calculations for each grounding system. Test and measurement data obtained for the installed grounding systems are presented and discussed.


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    Title :

    Design of grounding systems for Tri-Met Portland Westside light rail traction power substations


    Contributors:
    Thomas, R.S. (author) / Pham, K.D. (author)


    Publication date :

    1999


    Size :

    16 Seiten, 3 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Design of Grounding Systems for Tri-Met Portland Westside Light Rail Traction Power Substations

    Pham, K. D. / Thomas, R. S. / American Society of Mechanical Engineers; Rail Transportation Division| Institute of Electrical and Electronic Engineers; Land Transportation Division; Vehicular Technology Section | British Library Conference Proceedings | 1999


    Traction Power Supply for Tri-Met Portland Westside and Hillsboro Light Rail Extensions

    Pham, K. D. / Thomas, R. S. / American Society of Mechanical Engineers; Rail Transportation Division| Institute of Electrical and Electronic Engineers; Land Transportation Division; Vehicular Technology Section | British Library Conference Proceedings | 1999


    Tri-Met's Westside Light Rail Project

    Chow, R. / McCauley, P. / American Public Transit Association | British Library Conference Proceedings | 1996


    Embedded Tie Track On The Portland Westside Light Rail Tunnel Project

    Grodner, M. / Yanagisawa, S. / American Public Transit Association | British Library Conference Proceedings | 1998


    Equipment Grounding in Traction Power Substations

    Forquer, P. / American Public Transit Association | British Library Conference Proceedings | 1993