电工环氧绝缘件缺陷无损检测方法研究进展

doi:10.19595/j.cnki.1000-6753.tces.201033

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摘要超/特高压输变电技术迅速发展对电力设备绝缘性能提出了更高的要求。环氧绝缘件是电力设备绝缘系统的重要组成部分,但在生产、运行过程中都会产生不同程度的缺陷,在多场耦合作用下极易引发沿面闪络或击穿故障,威胁电力设备乃至电力系统的安全稳定运行,研究环氧绝缘件中缺陷的无损检测及评价方法具有重要意义。该文研究了环氧绝缘件在生产、运行过程中容易出现的缺陷类型,分析了不同缺陷对绝缘性能造成的影响。介绍了基于电学特性的缺陷检测方法、高频检测方法和超声波检测方法的基本原理,并评估了不同方法对环氧绝缘件缺陷的检测效果。从检测精度以及优缺点等角度对相关检测方法进行了综合评价,并对未来环氧绝缘件缺陷检测的研究和发展方向进行了展望。

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关键词 ：高压电力设备, 环氧绝缘件, 绝缘缺陷, 无损检测

Abstract：With the rapid development of ultra-high voltage and extra-high voltage power transmission and transformation technology, higher requirements are put forward for the insulation performance of power equipment. Epoxy insulation is an important part of the insulation system of high voltage power equipment, but some insulation defects with different levels will appear in the process of production and operation. Under the action of multi-field coupling, it is easy to cause surface flashover or breakdown fault, threatening the safe and stable operation of power equipment and even power system. It is of great significance to study the non-destructive detection methods of defects in epoxy insulation parts. In this paper, the defect types of epoxy insulation parts which were prone to appear in the production process and operation process were studied, and the impacts of different defects on the insulation performance were analyzed. The basic principles of defect detection methods based on electrical characteristics, high frequency detection methods and ultrasonic detection methods were introduced, and the detection effects of different methods on epoxy insulation defects were evaluated. A comprehensive evaluation of relative detection methods was made from the perspective of detection accuracy, advantages and disadvantages, and the future research and development direction of epoxy insulation defect detection was prospected.

Key words： High voltage power equipment epoxy insulation insulation defects non-destructive detection

收稿日期: 2020-08-30

PACS:

TM216

基金资助:国家自然科学基金（51807136,U1966203,51537008）和天津市自然科学基金（18JCQNJC07300）资助项目

通讯作者: 李进男,1988年生,博士,副教授,研究方向为超特高压GIS/GIL绝缘设计、环氧树脂基础配方工艺、绝缘缺陷无损检测。E-mail：lijin@tju.edu.cn

作者简介: 赵仁勇男,1997年生,硕士,研究方向为特高压GIS绝缘拉杆缺陷检测与故障机理分析。E-mail：zhaorenyong@tju.edu.cn

引用本文:

李进, 赵仁勇, 杜伯学, 郝留成, 边凯. 电工环氧绝缘件缺陷无损检测方法研究进展[J]. 电工技术学报, 2021, 36(21): 4598-4607. Li Jin, Zhao Renyong, Du Boxue, Hao Liucheng, Bian Kai. Research Progress of Nondestructive Detection Methods for Defects of Electrical Epoxy Insulators. Transactions of China Electrotechnical Society, 2021, 36(21): 4598-4607.

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