785 / 2022-03-31 22:33:51
Simulation calculation of 3D electric field and flashover path analysis of ice-covered silicone rubber insulator
ice-covered insulator,3D electric field,simulation calculation,arc,flashover
终稿
Yuyao Hu / Shandong University of Technology
Ice accretion on the insulator changes its electric field distribution, which seriously endangers security and stability of power grid. It is of great significance to study the electric field of iced insulator for disaster prevention and mitigation of power system. At present, the two-dimensional axisymmetric model of ice-accreted insulator is established to study the electric field. However, the effects of uneven icing, number of icicles, inclination angle of icicle, ice pallets and arc ignition on the electric field are ignored, which is inconsistent with the actual circumstance. Considering this, a three-dimensional simulation model of ice-covered insulator with applied voltage was developed in the present study. The average electric field intensity of air gap (Eav) and maximum field strength of icicle tip (Emax) were determined to characterize the influence of various factors on the electric field distortion degree. The results show that compared with the insulator without ice and with a dry ice, the supply voltage is almost entirely applied to all icicle air gaps for a wet ice-covered insulator. Eav is independent of icicle diameter and icicle number but increases with the increment of icicle length and icicle inclination angle. Emax raises with the increase of icicle length, icicle number, icicle inclination angle and icicle diameter. As the source of electric field distortion, ice pallets on the surface of the sheds rise the field strength of air gap. Based on the simulation analysis, the applied voltage is redistributed in the remining air gaps when an arc occurs in the gap near the high-voltage terminal, thereby causing the subsequent flashover.
重要日期
  • 会议日期

    09月25日

    2022

    09月29日

    2022

  • 08月15日 2022

    提前注册日期

  • 09月10日 2022

    报告提交截止日期

  • 11月10日 2022

    注册截止日期

  • 11月30日 2022

    初稿截稿日期

  • 11月30日 2022

    终稿截稿日期

主办单位
IEEE DEIS
承办单位
Chongqing University
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