空气湿度对非均匀交流电场下短间隙击穿特性的影响

ZHENG Yuesheng; REN Jianhua; SHU Shengwen; ZHANG Jia

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空气湿度对非均匀交流电场下短间隙击穿特性的影响

更新时间：2025-12-08

- 空气湿度对非均匀交流电场下短间隙击穿特性的影响
- Vol. 45, Issue 5, Pages: 1352-1359(2019)
- 作者机构：
  
  1. 福州大学电气工程与自动化学院
  2. 福建省新能源发电与电能变换重点实验室
  3. 西安电子科技大学空间科学与技术学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 May 2019，
  
  Published：2019
- 稿件说明：
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ZHENG Yuesheng, REN Jianhua, SHU Shengwen, et al. 空气湿度对非均匀交流电场下短间隙击穿特性的影响[J]. 2019, 45(5): 1352-1359.
DOI：

ZHENG Yuesheng, REN Jianhua, SHU Shengwen, et al. 空气湿度对非均匀交流电场下短间隙击穿特性的影响[J]. 2019, 45(5): 1352-1359. DOI：

摘要

在空气间隙击穿前出现电晕或辉光放电时

湿度对交流击穿电压可能会产生一定的影响

但是受影响的电极结构具体参数范围尚不清楚。为了进一步揭示空气湿度对非均匀交流电场下短间隙击穿特性的影响规律

设置电极间隙距离范围为1～5 cm和高压电极半径范围为0.1～2 cm

进行了相对湿度对空气间隙工频击穿电压影响的试验研究。在给定电极结构参数范围内

结果表明当电极半径>0.5 cm时

相对湿度对击穿电压几乎没有影响;当电极半径<0.5 cm时

相对湿度对击穿电压有一定的影响

开距越大影响越显著;当电极半径为0.3 cm时

相对湿度对击穿电压的影响最大。结合复合击穿判据进行分析

当几何结构参数大于临界值时流注击穿判据仍然是有效的

当几何结构参数小于临界值时击穿电场公式在部分区域需要考虑相对湿度进行一定的修正。结果可为非均匀空气绝缘间隙的设计提供参考。

Abstract

When corona or glow discharge occurs before the breakdown in air gap

air humidity may affect the AC breakdown voltage. However

the parameters ranges of the influenced electrode structure are not clear. In order to further reveal the influence of air humidity on the breakdown characteristics of short gaps under non-uniform AC electric fields

the AC breakdown tests were carried out with the interelectrode gap distance of 1～5 cm and the high voltage electrode radius of 0.1～2 cm. The results show that

within the given parameters of the electrode structure when the electrode radius is larger than 0.5 cm

the humidity has a negligible effect on the breakdown voltage. When the electrode radius is less than0.5 cm

the humidity will affect the breakdown voltage

especially under longer gap distances. When the electrode radius is 0.3 cm

the influence of the humidity is the most significant. Combined with the analyses of the hybrid breakdown criterion

the streamer breakdown criterion is still effective when the geometric structure parameter is larger than the critical value

but the breakdown field formula should be corrected in partial regions with the humidity being considered. The results can provide a reference for the insulating design of non-uniform air-insulated gaps.

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