[1]李光耀,尹现彬,吴广宁.人工磨蚀对车顶绝缘子沿面放电影响研究[J].高压电器,2019,55(09):143-149.[doi:10.13296/j.1001-1609.hva.2019.09.019]
 LI Guangyao,YIN Xianbin,WU Guangning.Study on the Creepage Discharge of Roof Insulators Due to Artificial Erosion[J].High Voltage Apparatus,2019,55(09):143-149.[doi:10.13296/j.1001-1609.hva.2019.09.019]
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人工磨蚀对车顶绝缘子沿面放电影响研究()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第55卷
期数:
2019年09期
页码:
143-149
栏目:
研究与分析
出版日期:
2019-09-30

文章信息/Info

Title:
Study on the Creepage Discharge of Roof Insulators Due to Artificial Erosion
作者:
李光耀 尹现彬 吴广宁
(西南交通大学电气工程学院, 成都 610031)
Author(s):
LI Guangyao YIN Xianbin WU Guangning
(College of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)
关键词:
车顶绝缘子 沙尘环境 磨蚀 憎水性 闪络电压
Keywords:
roof insulatordust environment erosion hydrophobicity flashover voltage
DOI:
10.13296/j.1001-1609.hva.2019.09.019
摘要:
沙尘环境对高速列车的安全运行有很大影响,为研究车顶绝缘子受风沙磨蚀后沿面放 电的变化,对车顶绝缘子片进行人工磨蚀试验,观察其表面粗糙度、憎水性及闪络电压的变化 。试验结果表明:不同磨蚀时间的试样表面憎水性变化趋势相似,砂纸目数对憎水性变化起主 导作用;随砂纸目数增大,磨蚀后绝缘片纵向干闪电压先下降后上升,横向干闪电压呈倒Z字 形变化,横向湿闪电压变化规律与纵向湿闪电压均呈U型变化。分析可知:磨蚀引起的爬电距 离增大与电场畸变共同作用,影响闪络电压的变化情况。文中通过研究车顶绝缘子憎水性及沿 面放电情况受人工磨蚀的影响,揭示了风沙磨蚀对车顶绝缘子沿面放电影响的机理。
Abstract:
To investigate the changes in the creepage discharge of high-speed train roof insulators in dust environment, erosion test of the roof insulator was carried out to observe the changes in its surface roughness, hydrophobicity and flashover voltage. Results show that: 1) the surface hydrophobicity of the insulator samples with different erosion time is similar, and the sandpaper mesh is the main factor influencing hydrophobicity change; 2) with the mesh of sandpaper increasing, the longitudinal insulation dry flashover voltage decreases first and then increases, and the transverse dry flashover voltage increases after the first drop then rises again the variation regularity of the transverse wet flashover voltage is consistent with the longitudinal wet flashover voltage, presenting U-shape. Analysis indicates that the increases of creepage distance and electric field distortion both affect the flashover voltage. In addition, the mechanism of dust erosion affecting the creepage discharge of roof insulators was also revealed.

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备注/Memo

备注/Memo:
收稿日期:2019-01-30; 修回日期:2019-03-27 基金项目:国家杰出青年基金(51325704);国家自然科学基金项目(青年科学基金)(51507146) 。 Project Supported by China National Funds for Distinguished Young Scientists (51325704),National Natural Science Foundation of China (National Science Foundation for Young Scientists of China) (51507146).李光耀(1992—),男,硕士研究生,主要从事电力系统外绝缘方面的研究。 吴广宁(1969—),男,博士,教授,博士生导师,主要从事高压电气设备的教学与研究工作。
更新日期/Last Update: 2019-09-10