Diameter Expanding and Reinforced Insulation Jacket for High Voltage Bare Conductor in 110 kV Substation

doi:10.7652/xjtuxb201412006

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Diameter Expanding and Reinforced Insulation Jacket for High Voltage Bare Conductor in 110 kV Substation

更新时间：2025-07-09

- Diameter Expanding and Reinforced Insulation Jacket for High Voltage Bare Conductor in 110 kV Substation
- Vol. 48, Issue 12, Pages: 34-40(2014)
- 作者机构：
  
  西安交通大学电力设备电气绝缘国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201412006
  CLC： TM85
- Online First：10 December 2014，
  
  Published：2014
- 稿件说明：
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Diameter Expanding and Reinforced Insulation Jacket for High Voltage Bare Conductor in 110 kV Substation[J]. 2014, 48(12): 34-40.
DOI：

Diameter Expanding and Reinforced Insulation Jacket for High Voltage Bare Conductor in 110 kV Substation[J]. 2014, 48(12): 34-40. DOI： 10.7652/xjtuxb201412006.

摘要

为了减小110 kV变电站带电作业或改造施工时

人和施工车辆与高压裸线安全距离不够导致放电事故的概率

研究了3种用于减小110 kV变电站高压裸线最小放电距离的扩径增强绝缘护套

即带薄层绝缘金属扩径护套、非接触式带内半导电涂层的环氧筒护套和接触式带内半导电涂层环氧筒护套。估算了3种护套的最小放电距离及其与半导电层半径和扩径的关系

获得了扩径绝缘结构最佳尺寸

并得出了变电站高压裸线扩径增强绝缘的一般准则。研究中

以装有金属扩径护套的110 kV裸导线为例

进行了电场分布的有限元分析。理论计算和有限元分析表明:带薄层绝缘金属扩径护套的效果最佳

最小放电距离与高压裸线相比减小了60%; 接触式带内半导电涂层环氧筒护套防护效果与金属扩径护套相近

但只能短期使用; 非接触式带内半导电涂层环氧筒护套不能起到防护作用。

Abstract

To reduce the probability of discharge between workers or vehicles and bare conductors in 110 kV substation

three new types of reinforced insulation jackets are designed and contrasted

including metal diameter expanding jacket

suspended epoxy insulation jacket

and electrically-contacted epoxy insulation jacket. The minimal discharge distance of those three types and its relationship with the diameter of semi-conducting coating and the expanded diameter is estimated theoretically to find the best size of expanded structure and general standard of diameter expanding jacket. Then a model of 110 kV bare conductor installing metal diameter expanding jackets is constructed to figure out the electric field distribution with finite element method. It is found that the metal diameter expanding jacket serves as the best choice

whose minimal discharge distance decreases by 60% compared with bare conductors

and the electrically-contacted epoxy insulation jacket has nearly the same effect in a short service period

while the suspended epoxy insulation jacket has no effect on the minimal discharge distance.

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references

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