Study on Current Carrying Stability of ± 400 kV SF6 Gas Insulated Wall Bushing for DC Engineer Application

ZHOU Ziyu; LI Fuyong; SUN Longyong; YAO Canjiang; PENG Xin; LU Ke; TONG Zhipeng; WANG Xin; XU Yanan; WANG Jing; YUAN Panke; YUE Hongwei

doi:10.13296/j.1001-1609.hva.2025.11.022

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Study on Current Carrying Stability of ± 400 kV SF6 Gas Insulated Wall Bushing for DC Engineer Application

Research & Analysis | 更新时间：2025-11-04

- Study on Current Carrying Stability of ± 400 kV SF6 Gas Insulated Wall Bushing for DC Engineer Application
- High Voltage Apparatus Vol. 61, Issue 11, Pages: 231-236(2025)
- 作者机构：
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- DOI：10.13296/j.1001-1609.hva.2025.11.022
  CLC：
- Received：10 May 2025，
  
  Revised：2025-07-20，
  
  Published：16 November 2025
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ZHOU Ziyu, LI Fuyong, SUN Longyong, et al. Study on Current Carrying Stability of ± 400 kV SF6 Gas Insulated Wall Bushing for DC Engineer Application[J]. High voltage apparatus, 2025, 61(11): 231-236.
DOI：

ZHOU Ziyu, LI Fuyong, SUN Longyong, et al. Study on Current Carrying Stability of ± 400 kV SF6 Gas Insulated Wall Bushing for DC Engineer Application[J]. High voltage apparatus, 2025, 61(11): 231-236. DOI： 10.13296/j.1001-1609.hva.2025.11.022.

摘要

文中以400 kV纯SF

气体绝缘结构的直流穿墙套管为研究对象，针对长期通流是否会影响直流穿墙套管的绝缘性能的问题进行研究，首先利用软件仿真分析直流穿墙套管整体和导电杆变形量，研究空心复合绝缘子与导电杆的同轴度，并对空心复合绝缘子和导电杆变形量进行试验研究，得到温度对导电杆变形量影响较小。设计长期通流试验方案开展长期通流试验，结果表明，导电杆变形量在16.52 mm至17.02 mm之间。通流产生的温升效应对于导电杆形变产生了有利影响，减小了导电杆的挠度。同时，在两侧接线端子施加配重的条件下通过了全部绝缘试验，验证了400 kV直流穿墙套管结构的合理性，为提升直流穿墙套管的可靠性奠定理论基础。

Abstract

In this paper，the 400 kV DC wall bushing with pure SF

gas insulated structure ia taken as the study object，and whether long-term current flow will affect the insulation performance of DC wall bushing is studied. First， the software simulation is used to analyze the overall deformation of DC wall bushing and conductive rod，study the coaxiality of hollow composite insulator and conductive rod，and perform experimental study on the deformation of hollow composite insulator and conductive rod. It is found that the temperature has little effect on the deformation of the conductive rod. The long-term current flow test scheme is designed and the long-term current test is performed. The results show that the deformation of the conductive rod is between 16.52 mm and 17.02 mm. The temperature rise effect due to the current flow has a beneficial effect on the deformation of the conductive rod，and reduces the deflection of the conductive rod. At the same time，all insulation tests have been passed under the condition of apply

ing counterweight to the terminals on both sides，which verifies the rationality of the 400 kV DC wall bushing structure and lays a theoretical foundation for improving the reliability of DC wall bushing.

关键词

Keywords

references

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