252kV GIS五种绝缘故障诱发因素的模拟计算及试验研究

发布时间：2018-03-28 04:30

本文选题：GIS　切入点：ANSYS　出处：《山东大学》2015年硕士论文

【摘要】：GIS组合电器投运规模日益庞大,由于其集成化高、占地面积少、日常维护工作量少等优点,目前GIS设备主要应用于人口密集、用地紧张的经济发达地区,GIS的可靠性直接影响着当地用电安全。相较于机械类故障,绝缘故障检修难度大、停电时间长、影响范围广,一直受到制造厂和用户的重点关注。本文从制造厂的立场上,对252kVGIS设备常见的、可能诱发绝缘故障的五种因素进行了统计,并利用ANSYS有限元分析软件对其进行了仿真模拟计算。由于研究对象体积较小,为最真实的还原实际情况,本文采用三维建模的方式,务求模型的准确性。计算时,为避免自动剖分对小尺寸形状的简化忽略,本文应用自定义网格划分工具进行网格剖分的参数化设置,成功完成了对小尺寸模型的网格剖分。通过计算分析,最终得出了几种绝缘故障因素对局部电场强度的影响。为验证理论计算的有效性,本文根据计算结果,设计了几种具有代表意义的试验,同时也对无法直接计算的几种因素,如绝缘件上的硅脂、水分等,都进行了试验验证,计算结果与试验结果两相印证,分析该因素对设备绝缘水平的影响程度。本次研究,为制造厂提供了大量的关于绝缘故障问题的理论和试验数据支持,证明了将仿真计算应用于高压绝缘设计的可行性和可操作性,对制造厂产品完善和开发都有积极意义。
[Abstract]:The scale of GIS combined electrical appliances is increasing. Because of its high integration, less area, less daily maintenance and other advantages, GIS equipment is mainly used in densely populated, and so on. The reliability of GIS has a direct impact on the safety of local electric power. Compared with mechanical faults, insulation failures are more difficult to repair, longer blackout time, and have a wide range of influence. It has always been the focus of attention of manufacturers and users. From the standpoint of manufacturers, this paper makes statistics on five common factors that may induce insulation failures in 252kVGIS equipment. The ANSYS finite element analysis software is used to simulate and calculate it. Because the object of study is small, it is the truest case to restore the actual situation. In this paper, the method of 3D modeling is adopted to make sure the accuracy of the model. In order to avoid the simplification and neglect of small size shape by automatic mesh generation, the parameterized setting of mesh generation is carried out by means of self-defined meshing tool, and the mesh generation of small size model is successfully completed. Finally, the influence of several insulation fault factors on the local electric field strength is obtained. In order to verify the validity of the theoretical calculation, several representative experiments are designed according to the calculated results, and some factors which cannot be directly calculated are also studied. For example, the silicon grease, moisture and so on on the insulating parts have been tested and verified. The calculated results are confirmed with the test results, and the influence of this factor on the insulation level of the equipment is analyzed. A large number of theoretical and experimental data on insulation fault are provided for the manufacturer, which proves the feasibility and maneuverability of applying simulation calculation to the design of high-voltage insulation, which is of positive significance to the perfection and development of the manufacturer's products.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM595

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