Research on Invasion of Moisture into the Crimping Interface of Insulator Under Hygrothermal Environment

LI Xiao; LI Guangmao; YANG Jie; YANG Sen; DU Gang

doi:10.13296/j.1001-1609.hva.2022.06.004

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Research on Invasion of Moisture into the Crimping Interface of Insulator Under Hygrothermal Environment

更新时间：2025-04-26

- Research on Invasion of Moisture into the Crimping Interface of Insulator Under Hygrothermal Environment
- High VoltageApparatus Vol. 58, Issue 6, Pages: 24-30(2022)
- 作者机构：
  
  广东电网有限责任公司广州供电局
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2022.06.004
  CLC： TM216
- Published：2022
- 稿件说明：
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LI Xiao, LI Guangmao, YANG Jie, et al. Research on Invasion of Moisture into the Crimping Interface of Insulator Under Hygrothermal Environment[J]. High voltageapparatus, 2022, 58(6): 24-30.
DOI：

LI Xiao, LI Guangmao, YANG Jie, et al. Research on Invasion of Moisture into the Crimping Interface of Insulator Under Hygrothermal Environment[J]. High voltageapparatus, 2022, 58(6): 24-30. DOI： 10.13296/j.1001-1609.hva.2022.06.004.

摘要

复合绝缘子是电网中的关键设备，在高湿高热的南方环境中，水分容易侵入复合绝缘子，有可能导致温升、机械破坏的事故发生。为研究湿热环境下水分侵入绝缘子压接界面的侵入路径，文中选取退役的复合绝缘子进行水煮试验和浸泡试验，并用傅里叶红外光谱、X射线光电子能谱、扫描电镜和EDS元素分析等工具分析了未经处理的绝缘子高压端密封胶试样和经过处理的绝缘子低压端密封胶试样在空气界面、护套界面、金具界面上的老化程度。通过试验得出结论：密封胶护套试样在实际运行的过程中会和护套发生交联反应；高压端密封胶试样老化情况比低压端密封胶试样更为严重；金具界面试样老化比空气界面试样更为严重；水分侵入复合绝缘子压接界面的路径主要是通过密封胶的金具界面进入。

Abstract

Composite insulator is the key equipment in power grid. Under the hygrothermal environment southern China

the moisture is more likely to invade into the insulator

which might result in occurrence of temperature rise and mechanical damage. For studying the the invasion path of moisture into the crimping interface of the insulator in the hydrothermal environment

the composite insulators out of operation are selected for boiling and socking test. Such tools as FTIR

XPS

SEM and EDS analysis are used to analyze the aging degree of the sealant at the high voltage sealing end of untreated insulator and and that at the low voltage sealing end of treated insulator on the interface of air

sheath and metal fitting. It is concluded through the test that crosslink reaction of sealant sheath sample and sheath can occur during the operation. The aging condition of the sealant sample at the high-voltage end is more serious than that of the low-voltage end. The aging of the fitting interface sample is more serious than that of the air interface. The path of invasion of moisture into the crimping interface of the insulator is mainly from the fitting interface of the sealant.

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