• DocumentCode
    2500149
  • Title

    Effect of surface charges on impulse flashover voltages of spacer in SF6

  • Author

    Zhang, Qiaogen ; Wang, Zhongfang ; Gu, Wenguo ; Qiu, Yuchang

  • Author_Institution
    Sch. of Electr. Eng., Xi´´an Jiaotong Univ., China
  • fYear
    1998
  • fDate
    27-30 Sep 1998
  • Firstpage
    445
  • Lastpage
    448
  • Abstract
    The positive and negative charges were injected onto the spacer surface by DC corona discharges, and the flashover characteristics were investigated by a sudden change from DC to lightning or steep-fronted impulse in the presence of a conducting-particle attached on the spacer in SF6 gas. Experimental results showed that the polarity of corona charges has a great influence on impulse flashover voltages. For the opposite polarity impulse to corona charges, there is a significant shift of the time domain where the minimum flashover voltage appears in the U-shaped curves of relationships between flashover voltage and wavefront duration (Uf-tf). Also, the influence of DC polarity reversal on the corona discharge current has been studied
  • Keywords
    SF6 insulation; corona; flashover; DC corona discharges; DC polarity reversal; SF6 gas; conducting-particle; negative charges; positive charges; spacer impulse flashover voltages; steep-fronted impulse; surface charges; wavefront duration; Circuit testing; Corona; Electrodes; Flashover; Geographic Information Systems; Insulation; Needles; Surface discharges; System testing; Voltage;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Electrical Insulating Materials, 1998. Proceedings of 1998 International Symposium on
  • Conference_Location
    Toyohashi
  • Print_ISBN
    4-88686-050-8
  • Type

    conf

  • DOI
    10.1109/ISEIM.1998.741778
  • Filename
    741778
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2500149