Textured Insulators for Overhead Lines and Substations

在这项研究计划中，建议调查绝缘材料表面纹理对其在施加高压和户外气候条件下的性能的影响。这是在卡迪夫的一项具有抗干带性能的绝缘结构专利和证明该概念的初步实验工作之后。建议研究具有半球形突起的表面，其布置方式使得所得绝缘表面的总表面积和爬电路径显著增加。这种纹理化还可以具有改善表面疏水性的附加益处。使用分析和数值计算技术的建模工作将用于评估各种形状的纹理尺寸在mm和cm范围内的性能。这个建模工作将被用来为实验工作筛选候选纹理。真空铸造设施将用于制备平板和绝缘体样品，这些样品将在斜面和污染室测试环境中进行测试。将进行各种表征实验室任务，包括长期污染暴露和老化调查，以便对各种质地进行分类。这将涉及同步视觉，电气和热测量。它是，然后，建议使用从平面样品的调查，选择两个或三个几何形状的完整的绝缘体的制造的优序。将使用alter进行对比试验和建模程序，以证明/评估纹理表面绝缘子的上级性能，特别是在污染条件下。此外，该计划还包括在室外污染测试站进行调查测试，并与英国制造商和海外学术团体合作。

In this research programme, it is proposed to investigate the effect of texturing the surface of insulating materials on their performance under applied high voltage and outdoor weather conditions. This follows a Cardiff patent for insulating structures having anti-dry band properties and initial experimental work which proved the concept. It is proposed to investigate surfaces having protuberances in the shape of hemispheres arranged in such a way that both the total surface area and the creepage path of the resulting insulation surface are increased significantly. Such texturing can also have the added benefit of improving the hydrophobicity of the surface. Modelling work using analytical and numerical computation techniques will be used to assess the performance of various shapes of texturing with dimensions in the mm and cm ranges. This modelling work will then be used to shortlist candidate textures for experimental work. A vacuum casting facility will be used to prepare flat and insulator samples that will be tested in inclined-plane and pollution-chamber test environments. Various characterisation laboratory tasks, including long term pollution exposure and ageing investigations, will be undertaken in order to classify the various textures. This will involve synchronising visual, electrical and thermal measurements. It is, then, proposed to use the order of merit from the flat samples investigations to select two or three geometries for fabrication of complete insulators. The allter will be used to conduct a comparative test and modelling programme which will demonstrate/assess the superior properties of the textured surface insulator, particularly under polluted conditions. Furthermore, this programme includes investigation tests at an outdoor pollution test station and collaboration with both a UK manufacturer and an overseas academic group.