基于多层模型的GIS盆式绝缘子温度分布仿真  

Simulation of Temperature Distribution on GIS Basin Insulator Based on Multi-layer Model

作　　者：高凯 陈洪岗 陆启宇 夏昊天 许乐然 关永刚[3] 丁登伟[3] GAO Kai;CHEN Honggang;LU Qiyu;XIA Haotian;XU Leran;GUAN Yonggang;DING Dengwei(State Grid Shanghai Electric Power Research Institute,Shanghai 200437,China;State Grid Shanghai Municipal Electric Power Company,Shanghai 200122,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]国网上海市电力公司电力科学研究院,上海200437 [2]国网上海市电力公司,上海200122 [3]清华大学电机工程与应用电子技术系,北京100084

出　　处：《高压电器》2020年第7期103-108,共6页High Voltage Apparatus

基　　金：国家电网有限公司科技项目资助(520940170024)。

摘　　要：GIS盆式绝缘子两侧存在与母线连接的电接触点,其接触电阻在GIS运行过程中可能会因接触不良而增大,从而产生异常发热,甚至引起故障。为探究盆式绝缘子在实际运行中的温度分布规律,文中利用110 kV GIS盆式绝缘子搭建了真型试验平台,依据该平台的参数建立了等比例的盆式绝缘子多层仿真模型,并通过注入等效热源的方式模拟通流导体、SF6气体以及GIS外壳对盆式绝缘子的热传递过程,替代了对流及辐射传热计算,使单次计算时间从几小时缩短至几分钟,在保证结果准确性的前提下有效提升了仿真计算速度。利用试验平台进行了800、1200、1600 A负荷电流的温升试验,通过红外仪及热电偶测量了盆式绝缘子表面的温度分布,验证了该仿真模型的有效性,并总结出不同负荷电流下仿真参数的设置规律。最后通过与单层模型仿真结果的对比分析表明多层模型的优化结果更加符合试验数据的温度变化规律。There are electrical contact points at both sides of the GIS basin insulator connected to the bus bar.The contact resistance may increase due to poor contact during the operation,resulting in abnormal heating and even cause a failure.In order to explore the temperature distribution of the basin insulator in operation,a 110 kV GIS basin insulator was used as a test platform.And a multi-layer simulation model of the basin insulator was established based on the platform parameters.The equivalent heat source was injected to simulate the heat transfer process of the conductor,SF6 gas,and GIS shell to the basin insulator,instead of convection and radiation.The single calculation time was reduced from hours to minutes using this method.The speed of calculation was effectively improved under the premise of ensuring the accuracy of the results.The temperature rise tests at 800,1200,and 1600 A load currents were carried out by the test platform.Infrared imager and thermocouples were used to measure the temperature distribution on the surface of basin insulator.The validity of the simulation model was verified by test data,and the regularity of simulation parameter settings under different load currents was summarized.Finally,compared with the simulation result of the single-layer model,the optimization result of the multi-layer model is closer to test data.

关 键 词：GIS 盆式绝缘子 多层模型 等效热源 

分 类 号：TM216[一般工业技术—材料科学与工程]