Study on Pollution Flashover Characteristics of RTV Coating Disc Suspension Insulators with Different Local Defects

FU Xiangyun; CAO Bin; CUI Jiansheng; SUN Haoran; MEI Hongwei; WANG Liming

doi:10.13296/j.1001-1609.hva.2018.08.005

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Study on Pollution Flashover Characteristics of RTV Coating Disc Suspension Insulators with Different Local Defects

更新时间：2025-04-26

- Study on Pollution Flashover Characteristics of RTV Coating Disc Suspension Insulators with Different Local Defects
- High VoltageApparatus Vol. 54, Issue 8, Pages: 27-32(2018)
- 作者机构：
  
  1. 国网连云港供电公司
  2. 清华大学深圳研究生院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.08.005
  CLC： TM216
- Published：2018
- 稿件说明：
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[1]伏祥运,曹彬,崔建胜,孙浩然,梅红伟,王黎明.局部破损RTV涂层盘型悬式绝缘子的污闪特性研究[J].高压电器,2018,54(08):27-32.

FU Xiangyun, CAO Bin, CUI Jiansheng, et al. Study on Pollution Flashover Characteristics of RTV Coating Disc Suspension Insulators with Different Local Defects[J]. High voltageapparatus, 2018, 54(8): 27-32.
[1]伏祥运,曹彬,崔建胜,孙浩然,梅红伟,王黎明.局部破损RTV涂层盘型悬式绝缘子的污闪特性研究[J].高压电器,2018,54(08):27-32. DOI： 10.13296/j.1001-1609.hva.2018.08.005.

FU Xiangyun, CAO Bin, CUI Jiansheng, et al. Study on Pollution Flashover Characteristics of RTV Coating Disc Suspension Insulators with Different Local Defects[J]. High voltageapparatus, 2018, 54(8): 27-32. DOI： 10.13296/j.1001-1609.hva.2018.08.005.

摘要

RTV涂层长期运行在高温、高湿和强紫外线照射的环境中局部区域涂层会出现粉化甚至脱落现象

文中针对此现象

对不同类型局部破损RTV涂层盘型悬式绝缘子的污闪特性进行了研究。制作不同类型局部破损RTV涂层的玻璃试片

利用人工污闪试验研究局部破损情况对污闪特性的影响

并通过盘式悬式绝缘子的人工污闪试验对以上结果进行了验证;利用有限元软件研究RTV涂层局部破损情况对绝缘子表面电场分布的影响。研究结果表明:绝缘子表面RTV涂层局部破损对盘型悬式绝缘子污闪特性有着重要影响

破损区域沿爬电距离方向距离越长

对其防污闪性能影响越大;局部破损发生的位置不同对污闪电压影响大小也不同

破损位置发生在高压端钢脚附近对污闪电压的影响较小;局部区域RTV涂层的破损会导致其他未破损区域的压降和电场畸变增大

容易产生电晕放电

加速劣化未破损区域RTV涂层的憎水性及憎水迁移性。

Abstract

Under high temperature

high humidity and strong ultraviolet radiation environment

the performances of RTV（room temperature vulcanized silicone rubber）coating caused by pulverization

local defect and uneven hydrophobicity on surfaces of insulator will be deteriorated. In this paper

the effects of anti-pollution flashover of RTV with partial defects are analyzed. The pollution flashover tests of glass samples with RTV coating are designed to research the influence of the pollution flashover voltage and the similar cap and pin insulators are also used to verify the test results. The finite element software is used to analyze the influence of the electric field on the surface of insulator caused by local defects. The test results show that the anti-pollution flash performance will become much worse as the length of partial defect of RTV coating in the direction of creepage distance is longer

the influence of pollution flashover voltage is different if the position that the partial defect of RTV coating on the surface of insulator is located in different

and there is no significant decrease in the anti-pollution flashover performance if the partial defect appears on the high voltage side. The electric field in other area of RTV coating will enhance

which leads to the corona discharge more likely to appear and damage the hydrophobicity of other RTV coating.

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