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873 / 2022-06-28 21:21:07
Research on Lightning Overvoltage of 110 kV Line of Canceling Ground Wire and Installing Composite Arrester Combined Insulator
Ground wire; Composite arrester combined insulator; Lightning overvoltage; Trip
2. Transients and EMC: Lightning, Switching, Repetitive Transients
终稿
Ting Zhu / State Key Laboratory of Power Transmission Equipment & System Security and New Technology
Jianlin HU / State Key Laboratory of Power Transmission Equipment & System Security and New Technology
Jianping Hu / Disaster Prevention and Reduction Center of State Grid Hunan Electric Power Corporation
Zhen Fang / Disaster Prevention and Reduction Center of State Grid Hunan Electric Power Corporation
Ruihe Zhang / State Key Laboratory of Power Transmission Equipment & System Security and New Technology
The 110 kV transmission line passing the mountain areas is prone to severe icing on the conductors and overhead ground wires in winter as a result of micro landform and climate. While severe icing of the overhead ground wire will increase the sagging of the ground wire, causing the discharge of the phase wire to the ground wire and probably a disconnection accident. Since there is no effective ice-melting measure for the icing of overhead ground wires now, canceling the overhead ground wires is considered feasible to reduce icing accidents. The lightning strike problems caused by the removal of the ground wire will affect the normal operation of the line, so the composite arrester combined insulator with lightning protection function can be installed in the line to avoid this. This paper is based on the electromagnetic transient simulation software ATP, a lightning strike simulation model of the line without ground wire was built. The distribution law of lightning overvoltage on the tower top, composite arrester combined insulator insulation section, lightning protection section and wires is analyzed when the line is struck by lightning. Under the lightning current amplitude of 160 kA, the overvoltage of the lightning protection section is only 280.8 kV when the tower is struck by lightning, and the overvoltage of the lightning protection section reaches 346.07 kV when the lightning strikes the wire. The research results show that due to the special working principle of the composite arrester combined insulator, the lightning overvoltage will be clamped at a very low level under the action of the arrester, and it is difficult to cause the trip of the grounding line.

 
重要日期

  • 会议日期

    09月25日

    2022

    至

    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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