A New Approach to Anti-fog Design for Polymeric Insulators
A New Approach to Anti-fog Design for Polymeric Insulators
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DOI：
10.1109/tdei.2010.5448087
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发表时间：
2010-04-01
影响因子：
3.1
通讯作者：
Charalampidis, P.
中科院分区：
文献类型：
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作者：
Haddad, A.;Waters, R. T.;Charalampidis, P.
受污染的聚合物绝缘子的柄部区域中的电场强度和漏电流密度可能导致局部干带，并具有因局部电弧放电而长期劣化的风险。在一种新的方法来干带控制，硅橡胶表面的纹理完成的特性进行了研究，并根据选择的纹理的几何形状，可以实现两个有用的目标。首先，表面积的增加既可以降低在脆弱的柄部区域的泄漏电流密度，也可以增加纵向爬电距离。第二，可以减轻表面放电造成的损害。详细阐述了防雾设计的原则。虽然完整的原型绝缘子现在被指定为制造，本文报告的初步结果，从测试中使用矩形样品，这表明性能的改善。试验分为两类：a）斜面，用于评估绝缘材料矩形样品的侵蚀和痕迹。这种样品已经制备成具有常规平面表面和具有纹理化表面两者以用于比较测试; B）使用已知盐度的初始干燥污染层的清雾测试。在这里，平面和纹理样品已被用于比较测试，其中泄漏电流和放电活动的烟雾的产生过程中进行监测。
Electric field strength and leakage current density in the shank region of a polluted polymeric insulator may cause local dry-banding, with a risk of long-term degradation from partial-arc discharges. In a novel approach to dry-band control, the characteristics of silicone rubber surfaces with a textured finish are investigated and, depending on the geometry chosen for the texture, two useful objectives can be achieved. First, the increase of surface area can both reduce the leakage current density in the vulnerable shank region, and also increase the longitudinal creepage distance. Secondly, the damage arising from surface discharges can be mitigated. The principles of the proposed anti-fog design are described in detail. While complete prototype insulators are now being specified for fabrication, this paper reports preliminary results from tests using rectangular samples, which show an improvement in performance. The tests are of two kinds: a) inclined-plane, to assess erosion and tracking on rectangular samples of insulation materials. Such samples have been prepared both with a conventional plane surface and with a textured surface for comparative tests; b) clean-fog tests that use an initially dry pollution layer of known salinity. Here, plane and textured samples have been used for comparative tests, where leakage current and discharge activity are monitored during the generation of the fog.