复合绝缘子表面液滴形貌特征及其对闪络电压的影响

发布时间：2019-01-05 09:24

【摘要】：为研究灾害性浓雾天气对绝缘子运行安全可靠性的影响,以硅橡胶绝缘子作为样品,采用可视化试验系统和人工大气模拟试验装置,研究了不同污湿条件下绝缘子表面液滴的吸附与凝结特征及其对绝缘子闪络电压的影响。分别研究了盐雾污秽度、相对湿度对表面液滴吸附、凝结与分布特征(分布面积、尺寸分布及其盒子维数)的影响,并在此基础上得到了这些特征参数对闪络电压的影响规律。结果表明,当相对湿度与污秽度增大时,绝缘子表面凝结的液滴数量增加,中间尺寸(1 mm≤液滴最大直径Dmax2 mm)与较大尺寸(Dmax≥2 mm)的液滴数量显著增加,而较小尺寸(Dmax1 mm)的液滴数量呈下降趋势。液滴分布盒子维数的增大说明液滴分布的分散性和复杂性增强。绝缘子表面附水质量的变化不能有效反映闪络电压的变化,但随着液滴分布盒子维数的增大,绝缘子闪络电压降低。
[Abstract]:In order to study the influence of severe fog weather on the safety and reliability of insulator operation, the silicone rubber insulator was used as a sample, a visual test system and an artificial atmospheric simulation test device were used. The adsorption and condensation characteristics of liquid droplets on insulator surface and their effects on the flashover voltage of insulator were studied. The effects of contamination degree and relative humidity of salt spray on surface droplet adsorption, condensation and distribution (distribution area, size distribution and box dimension) were studied, and the influence of these parameters on flashover voltage was obtained. The results show that the number of droplets condensed on the insulator surface increases with the increase of relative humidity and contamination degree, and the number of droplets with intermediate size (1 mm 鈮，

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