Impact of Corona Discharge on Total Electric Field in the SF<sub>6</sub>Insulated DC Wall Bushing

刘泰蔚; 谢雄杰; 胡伟; 蔡广燚; 许佐明; 白正; 尹朋博

doi:10.3969/j.issn.1008-0198.2025.05.009

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Impact of Corona Discharge on Total Electric Field in the SF₆Insulated DC Wall Bushing

更新时间：2026-01-10

- Impact of Corona Discharge on Total Electric Field in the SF₆Insulated DC Wall Bushing
- Vol. 45, Issue 5, Pages: 64-70(2025)
- 作者机构：
  
  1. 中国电力科学研究院有限公司电网环境保护全国重点实验室,湖北,武汉,430074
  2. 电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室, 清华大学,北京,100084
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.1008-0198.2025.05.009
  CLC： TM851
- Published Online：11 November 2025，
  
  Published：11 November 2025
- 稿件说明：
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刘泰蔚, 谢雄杰, 胡伟, 蔡广燚, 许佐明, 白正, 尹朋博. 电晕放电对SF

刘泰蔚, 谢雄杰, 胡伟, et al. Impact of Corona Discharge on Total Electric Field in the SF₆Insulated DC Wall Bushing[J]. 2025, 45(5): 64-70.
刘泰蔚, 谢雄杰, 胡伟, 蔡广燚, 许佐明, 白正, 尹朋博. 电晕放电对SF DOI： 10.3969/j.issn.1008-0198.2025.05.009.

刘泰蔚, 谢雄杰, 胡伟, et al. Impact of Corona Discharge on Total Electric Field in the SF₆Insulated DC Wall Bushing[J]. 2025, 45(5): 64-70. DOI： 10.3969/j.issn.1008-0198.2025.05.009.

摘要

高压直流穿墙套管合成电场在有电晕放电时会发生显著变化。对此

以工程应用的±100 kV SF

气体绝缘直流穿墙套管为研究对象

采用场磨式静电探头法

测量直流穿墙套管在+90 kV直流电压极化和结束加压后去极化过程中的合成电场。通过在套管安装法兰附近布置接地尖端诱发电晕放电

分析不同尖端长度对直流穿墙套管合成电场的影响。结果表明：正常工况下随着极化时间的增加

直流穿墙套管合成电场先快速下降

之后趋于平缓

并在7 200 s后达到稳定状态

这是因为套管表面积累了异极性空间电荷;在去极化过程中

合成电场呈现近似指数衰减过程

其时间常数约为3×10

s;随着尖端长度的增加

电晕放电呈现由放电量小、放电次数多到放电量大、放电次数少的变化过程

导致直流穿墙套管合成电场下降速率加快且稳定值降低。研究为探明直流穿墙套管复合外套表面电荷分布规律提供了数据支撑。

Abstract

The total electric field in HVDC wall bushing undergoes significant changes under corona discharge conditions. Therefore

an engineering-applied ±100 kV SF

gas-insulated DC wall bushing is selected as the study object. Using a field mill-type electrostatic field meter

the total electric field during both polarization under +90 kV DC voltage and subsequent depolarization after voltage removal are measured. The grounding tips are installed near the HVDC wall bushing flange to induce corona discharge

and the influence of tip lengths on the total electric field i

s analyzed. The results show that under normal conditions

the total electric field decreases rapidly initially and then stabilizes after 7200s with increasing polarization time

due to the accumulation of space charges on the surface. During depolarization

the total electric field decays approximately exponentially with a time constant of about 3×10

s. As the tip length increases

the corona discharge transitions from smaller discharge magnitudes with higher frequencies to larger magnitudes with lower frequencies

resulting in a faster decrease rate and a lower stabilized value of the total electric field in the HVDC wall bushing. This study provides data support for elucidating the space charge distribution pattern on surface of HVDC wall bushings.

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references

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Impact of Corona Discharge on Total Electric Field in the SF6Insulated DC Wall Bushing

DOI：10.3969/j.issn.1008-0198.2025.05.009

摘要

Abstract

关键词

Keywords

references

Impact of Corona Discharge on Total Electric Field in the SF₆Insulated DC Wall Bushing