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Long-Term Sequential Characteristics of Negative Partial Discharge in Pressurized SF6 Gas

  • T. Takahashi
  • M. F. Fréchette
  • R. Y. Larocque
  • C. Hudon
  • T. Umemura
  • S. Matsumoto
  • H. Okubo

Abstract

SF6 gas insulated electric power apparatus such as GIS and GIL have been operated under high gas pressure condition at around 0.5 MPa-abs[1,2]. Here, metallic particle contaminants in GIS would generate negative partial discharges (PD) firstly, because negative PD inception voltage is lower than positive one. In such high gas pressure condition, there is a possibility that breakdown occurs without replete positive PD precursor to it. In this case, only negative PD measurement could be a method for the insulation diagnosis. Therefore, in the commissioning process and under operation, it is important for the insulation diagnosis at the early stage to clarify the negative PD mechanism under high gas pressure condition.

Keywords

Pulse Sequence Pulse Train Needle Electrode Partial Discharge Initial Electron 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • T. Takahashi
    • 1
  • M. F. Fréchette
    • 1
  • R. Y. Larocque
    • 1
  • C. Hudon
    • 1
  • T. Umemura
    • 2
  • S. Matsumoto
    • 2
  • H. Okubo
    • 3
  1. 1.Institut de Recherche d’Hydro-QuébecVarennesCanada
  2. 2.Toshiba CorporationKawasakiJapan
  3. 3.Nagoya UniversityNagoyaJapan

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