Thermal profiles of high-voltage capacitor units

Research output: Contribution to conferencePaperpeer-review

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High voltage capacitors are useful in power factor correction, harmonic filtering, energy storage and voltage support for modern electrical power systems. Even modest failure rates can be compounded by large numbers of assets deployed in high capacity installations, and as fuses are positioned internally or omitted in pursuit of more efficient capacitor designs, it becomes increasingly challenging to identify the location of a faulted element within a module. This paper investigates detectability of an internal heat source from distributions of temperature on a capacitor unit’s outer housing. A model of a high voltage capacitor module is presented and is used to simulate the propagation of thermal energy from a heat source sited at select positions within a unit to a steel enclosure. Resultant heat distributions are shown to be readily influenced by foil arrangement and heat source location within a capacitor, since foils both direct and contain heat.
Original languageEnglish
Number of pages4
Publication statusPublished - 20 Oct 2019
EventAnnual Conference on Electrical Insulation and Dielectric Phenomena (2019): CEIDP 2019 - Pacific Northwest National Laboratory, Richland, United States
Duration: 20 Oct 201923 Dec 2019


ConferenceAnnual Conference on Electrical Insulation and Dielectric Phenomena (2019)
Abbreviated titleCEIDP 2019
Country/TerritoryUnited States
Internet address


  • capacitors
  • fault detection
  • partial discharge


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  • A capacitor bank simulation model

    Mackinnon, C. J. & Stewart, B. G., 5 Aug 2020, 2020 IEEE Electrical Insulation Conference (EIC). Piscataway, NJ: IEEE, p. 494-497 4 p. 9158697

    Research output: Chapter in Book/Report/Conference proceedingConference contribution book

    Open Access
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