• DocumentCode
    2107020
  • Title

    Development of new ways of designing of HV-insulation for power energetic with improved reliability on a basis of newest knowledge about surface discharge

  • Author

    Valdman, Alexander

  • Author_Institution
    EHV Lab., Super. Cables, Ltd., Kiriat Bialik
  • fYear
    2007
  • fDate
    22-24 Oct. 2007
  • Firstpage
    156
  • Lastpage
    158
  • Abstract
    The modern design of outdoor HV insulators is determined by rules that follow from characteristics of mechanisms of their flashover, such as: 1) The leader-streamer mechanism of breakdown of gaseous gaps close to dielectric surface under impulses of over voltages; 2) The mechanism of flashover of insulator on an AC by partial arcs with polluted and humidified surface. As a result of our research, [1-5], a new alternative mechanism of flashover of HV insulation was discovered and investigated. The mechanism was named - anomalous discharge (AD). As it was discovered, AD-mechanism has essential practical value because it´s capable to generate full flashovers on majority of modern insulators at much smaller voltages than it was considered earlier, (lightning and switching over voltages and also on AC). This research is devoted to the efficiency of non-standard ways for control of AD with purpose to increase reliability of work of power energetic objects as a whole, i.e. increase the real BIL of their insulation.
  • Keywords
    flashover; insulators; power system reliability; surface discharges; anomalous discharge; dielectric surface; gaseous gaps breakdown; insulator flashover; leader-streamer mechanism; outdoor HV insulators; power energetic objects; power energetic reliability; surface discharge; AC generators; Breakdown voltage; Dielectric breakdown; Dielectrics and electrical insulation; Flashover; Gas insulation; Pollution; Surface contamination; Surface discharges; Voltage control;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Electrical Insulation Conference and Electrical Manufacturing Expo, 2007
  • Conference_Location
    Nashville, TN
  • Print_ISBN
    978-1-4244-0446-9
  • Electronic_ISBN
    978-1-4244-0447-6
  • Type

    conf

  • DOI
    10.1109/EEIC.2007.4562609
  • Filename
    4562609