中国电力 ›› 2022, Vol. 55 ›› Issue (4): 117-122.DOI: 10.11930/j.issn.1004-9649.202106065

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±1100 kV接地极线路带电作业绝缘工具最小有效绝缘长度

雷兴列1, 程登峰2, 操松元2, 彭勇1, 夏令志2   

  1. 1. 中国电力科学研究院有限公司, 湖北 武汉 430074;
    2. 国网安徽省电力有限公司, 安徽 合肥 230022
  • 收稿日期:2021-06-25 修回日期:2021-11-05 出版日期:2022-04-28 发布日期:2022-04-24
  • 作者简介:雷兴列(1987—),男,通信作者,硕士,工程师,从事输电线路运行维护、带电作业技术研究,E-mail:345854711@qq.com;程登峰(1980—),男,硕士,高级工程师(教授级),从事高电压技术与输电运检技术研究,E-mail:chengdf2638@ah.sgcc.com.cn;操松元(1978—),男,硕士,高级工程师,从事高电压技术和架空线路带电作业及检修技术研究,E-mail:694455650@qq.com
  • 基金资助:
    国家电网有限公司科技项目(±1100 kV 特高压直流线路带电作业和检修关键技术研究,5200-201920077 A-0-0-00)。

The Minimum Effective Insulation Length of Insulating Tools for Live Working on ±1100 kV Grounding Electrode Lines

LEI Xinglie1, CHENG Dengfeng2, CAO Songyuan2, PENG Yong1, XIA Lingzhi2   

  1. 1. China Electric Power Research Institute, Wuhan 430074, China;
    2. State Grid Anhui Electric Power Co., Ltd., Hefei 230022, China
  • Received:2021-06-25 Revised:2021-11-05 Online:2022-04-28 Published:2022-04-24
  • Supported by:
    This work is supported by Science and Technology Project of SGCC(Research on Key Technologies for Live Working and Maintenance of ±1 100 kV UHVDC Lines, No. 5200-201920077 A-0-0-00)

摘要: 绝缘工具的最小有效长度是保证带电作业人员安全的重要技术参数,现有标准及研究均无±1100 kV接地极线路相关规定或参考。为了保证接地极线路带电作业安全开展,以±1100 kV接地极线路为例,仿真计算该线路最大过电压水平及波形特征,分别开展典型带电作业绝缘工具的工频、直流、标准操作冲击放电试验,分析试验布置方式、绝缘工具类型、施加电压类型对放电电压的影响,结果表明:短间隙距离情况下直流放电电压最低。最后基于试验结果提出绝缘工具短间距下的工频、直流、标准操作冲击放电特性拟合公式,同时给出了±1100 kV接地极线路带电作业绝缘工具的最小有效绝缘长度参考值。

关键词: 接地极线路, 带电作业, 绝缘工具, 放电特性, 最小有效绝缘长度

Abstract: The minimum effective length of insulating tools is an important parameter to ensure the safety of live working personnels, but there are no such provisions or references for live working on grounding electrode lines in existing standards or researches. In order to ensure the safety of live working on the grounding electrode lines, simulation is carried out on a ±1 100 kV grounding electrode line to obtain the maximum over-voltage and its waveform characteristics. AC, DC, and standard operating impulse discharge tests are conducted on typical insulating tools for live working, and the influence of test layout, types of insulating tools, and applying voltage types on the discharge voltage are analyzed. The results show that the DC discharge voltage is the lowest in the case of short insulating tools. Finally, based on the test results, fitting formula are proposed respectively for determing the AC, DC, and standard switching impulse discharge characteristics for short insulating tools. In addition, the minimum effective insulation length of insulating tools are proposed for live working on ±1 100 kV grounding electrode lines.

Key words: grounding electrode line, live working, insulating tools, discharge characteristics, minimum effective insulation length