内蒙古电力技术

2021, (01) 93-97

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10 kV支柱瓷绝缘子釉面耐电蚀损试验研究
Experimental Study on Electro-Corrosion Resistance of Glazed Surface of 10 kV Pillar Porcelain Insulator

闫康,郑战强
YAN Kang,ZHENG Zhanqiang

摘要(Abstract):

为了研究严酷环境下支柱瓷绝缘子釉面耐电蚀损情况,在实验室内模拟现场恶劣环境,采用交流斜面法对支柱绝缘子进行了耐电蚀损试验。试验持续了700 h,分析了不同时刻电极的放电情况,并对电蚀一定时间后的绝缘子进行泄漏电流试验、工频湿闪络电压试验、工频干闪络电压试验。结果表明,经过长时间的电蚀后,试品绝缘子表面釉层发生了化学变化,釉层碳化严重,出现了鼓包和微裂纹;绝缘子内部形成了断续的闪络通道,造成绝缘子工频干闪络、湿闪络电压等电气性能明显降低。
In order to research the electro-corrosion resistance of the pillar porcelain insulator glazed surface under severe environment, the AC inclined surface method is used to test the electro-corrosion of pillar porcelain insulator in the simulated harsh environment in the laboratory. The test voltage is constant leakage tracking voltage method. The test has been lasted for 700 hours, recording the discharge of electrodes at different times, taking pictures of discharge and infrared temperature measurement, and conducting leakage current test, power frequency wet flashover voltage test and power frequency dry flashover voltage test on insulators corroded for a certain time. The research shows that after a long period of electrical corrosion, the glaze layer on the surface of the test insulator has chemical changes, the glaze layer is severely carbonized, and bulges and microcracks have appeared. Intermittent flashover channels are formed inside the insulators,resulting in dry flashes at power frequency. Electrical properties such as network and wet flashover voltage are significantly reduced.

关键词(KeyWords): 支柱瓷绝缘子;电蚀损;交流斜面法;泄漏电流;工频干闪络;工频湿闪络
pillar porcelain insulator;electro-corrosion resistance;AC inclined surface method;leakage current;power frequency dry flashover test;power frequency wet flashover test

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作者(Author): 闫康,郑战强
YAN Kang,ZHENG Zhanqiang

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