应用显微红外法的硅橡胶复合绝缘子伞裙老化深度研究

发布时间：2018-04-06 01:24

本文选题：复合绝缘子　切入点：硅橡胶伞裙　出处：《电网技术》2017年04期

【摘要】：复合绝缘子在运行环境因素的综合作用下易发生老化并引发绝缘子性能劣化乃至失效,因此对绝缘子老化影响深度进行检测和评估非常必要。采用显微红外光谱技术,通过测量硅橡胶伞裙由表及里不同深度处的2960 cm-1甲基峰面积分布变化,发展了一种测量运行硅橡胶复合绝缘子老化深度的检测技术。系统讨论了显微红外光谱法的测试原理、扫描方式、边界效应影响等问题,并分别针对线扫描及面扫描模式提出了相应的老化深度计算方法。同时应用该方法测试了广东电网500kV输电线路抽检复合绝缘子低压端伞裙的老化深度,发现基本在50~85?m之间;还对500kV榕茅甲线断串复合绝缘子的故障部位伞裙的老化状态进行了研究,发现由于高压端放电现象严重,故障部位伞裙老化深度达105~141?m,为正常老化情况(35?m)的3~4倍。
[Abstract]:Composite insulators are prone to aging under the combined action of operating environment factors and lead to the deterioration of insulator performance and even failure. Therefore it is necessary to detect and evaluate the influence depth of insulator aging.By measuring the area distribution of 2960 cm-1 methyl peak at different depth from outside to inside of silicone rubber umbrella skirt, a method for measuring the aging depth of running silicone rubber composite insulator was developed by means of micro-infrared spectroscopy.The testing principle, scanning mode and boundary effect of micro-infrared spectroscopy are systematically discussed, and the corresponding calculation methods of aging depth are put forward for line scanning and surface scanning respectively.At the same time, the aging depth of the low-voltage terminal skirt of composite insulator for 500kV transmission line sampling in Guangdong Power Grid is measured, and it is found that the aging depth is between 50m and 85m.The aging state of the umbrella skirt in the fault part of the composite insulator of 500kV Fanyong Maojia line is also studied. It is found that the aging depth of the umbrella skirt in the fault area is up to 105 ~ 141m because of the serious discharge at the high voltage end, which is 34 times as high as that of the normal aging condition (35m).
【作者单位】：广东电网公司电力科学研究院;武汉大学物理科学与技术学院;
【基金】：国家自然科学基金项目(21174108) 中国南方电网公司科技项目(K-GD2014-185)~~
【分类号】：TM216

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