Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Impulse-driven surface breakdown data : a Weibull statistical analysis

Wilson, Mark and Given, M and Timoshkin, Igor and MacGregor, Scott and Wang, Tao and Sinclair, M.A. and Thomas, K.J. and Lehr, Jane (2012) Impulse-driven surface breakdown data : a Weibull statistical analysis. IEEE Transactions on Plasma Science, 40 (10). 2449 - 2456. ISSN 0093-3813

[img]
Preview
PDF - Submitted Version
Download (607Kb) | Preview

    Abstract

    Surface breakdown of oil-immersed solids chosen to insulate high-voltage, pulsed-power systems is a problem that can lead to catastrophic failure. Statistical analysis of the breakdown voltages, or times, associated with such liquid-solid interfaces can reveal useful information to aid system designers in the selection of solid materials. Described in this paper are the results of a Weibull statistical analysis, applied to both breakdown-voltage data and time-to-breakdown data generated in gaps consisting of five different solid polymers immersed in mineral oil. Values of the location parameter γ provide an estimate of the applied voltage below which breakdown will not occur, and under uniform-field conditions, γ varied from 192 kV (480 kV/cm) for polypropylene to zero for ultra-high molecular weight polyethylene. Longer times to breakdown were measured for UHMWPE when compared with the other materials. However, high values of the shape parameter β reported in the present paper suggest greater sensitivity to an increase in applied voltage – that is, the probability of breakdown increases more sharply with increasing applied voltage for UHMWPE compared to the other materials. Analysing peak-applied-voltage data, only PP consistently reflected a low value of β across the different sets of test conditions. In general, longer mean times to breakdown were found for solid materials of εr more closely matched to that of the surrounding mineral oil

    Item type: Article
    ID code: 39530
    Keywords: weibull statistical analysis, breakdown voltage, pulse power systems , flashover , dielectric breakdown, weibull distribution, Electrical engineering. Electronics Nuclear engineering, Condensed Matter Physics, Nuclear and High Energy Physics
    Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
    Department: Faculty of Engineering > Electronic and Electrical Engineering
    Related URLs:
      Depositing user: Pure Administrator
      Date Deposited: 04 May 2012 14:21
      Last modified: 30 May 2014 08:35
      URI: http://strathprints.strath.ac.uk/id/eprint/39530

      Actions (login required)

      View Item

      Fulltext Downloads: