孙庆峰,柳青山,骆宗义,华正轩,邹君文,刘学广
SUN Qingfeng,LIU Qingshan,LUO Zongyi,HUA Zhengxuan,ZOU Junwen,LIU Xueguang

• 1:浙江省电力锅炉压力容器检验所有限公司
• 2:国网浙江省电力有限公司衢州供电公司
• 3:国网浙江省电力有限公司金华供电公司
• 4:国网浙江省电力有限公司宁波供电公司

摘要(Abstract)：

针对某供电公司220 k V基建变电站35 k V高压支柱瓷绝缘子小角度纵波探伤缺陷案例,运用X射线数字成像技术检测、绝缘电阻试验、泄漏电流试验、解剖后宏观检查、孔隙性试验等技术手段,对小角度纵波探伤缺陷支柱瓷绝缘子进行了检测分析。试验结果表明,该支柱瓷绝缘子DR检测无异常缺陷显示,但其绝缘电阻值偏低、泄漏电流超标,解剖后发现瓷体内部存在大面积黄芯,且孔隙性试验不合格。综合分析检测结果,判定该支柱瓷绝缘子不符合挂网运行使用要求。
In this paper, based on the unqualified result of the small-angle longitudinal wave detection of a35 k V high voltage post insulator of ceramic material in a 220 k V converting station of a power supply company, technical methods like X-ray digital radiography(DR) detection, insulation resistance test, leakage current test, macro examination after disassembly and porosity test are used to analyze this high voltage post insulator. The tests show that no flaws are found by DR in this ceramic post insulator, but its insulation resistance is lower than standard level and its leakage current is higher than standard level; besides, large yellow core inside is found and porosity test is not up to the standard. In conclusion, the ceramic post insulator cannot be used in power grid for operation.

关键词(KeyWords)： 高压支柱瓷绝缘子;小角度纵波探伤;数字成像技术;缺陷;原因分析
high voltage ceramic post insulators;small-angle longitudinal wave detection;DR;flaws;cause analysis

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 孙庆峰,柳青山,骆宗义,华正轩,邹君文,刘学广
SUN Qingfeng,LIU Qingshan,LUO Zongyi,HUA Zhengxuan,ZOU Junwen,LIU Xueguang

DOI: 10.19585/j.zjdl.201809006

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