252 kV三相共箱GIS母线壳体温度场分布特性研究  

Research on Temperature Field Distribution Characteristics of 252 kV Three-phase Enclosed GIS Bus Bar Shell

作　　者：金虎 彭在兴 王颂 丛浩熹 李庆民[2] 徐珩耀 

机构地区：[1]南方电网科学研究院有限责任公司,广州510663 [2]华北电力大学电气与电子工程学院,北京102206

出　　处：《高压电器》2017年第12期20-25,共6页High Voltage Apparatus

基　　金：国家高技术发展研究计划(863计划)(2011AA05A121);国家自然科学基金(51277061;51420105011);南方电网技术攻关项目(SEPRI-A162018)~~

摘　　要：气体绝缘金属封闭开关(gas insulated switchgear,GIS)在电力系统中应用广泛,其内部触头过热会引发重大事故,因此研究其温度场分布特性具有重要意义。文中设计了252 kV GIS温升实验平台,通过实验获得了GIS母线导体、SF6气体和外壳部位的温度分布情况。针对上述实验平台建立了GIS三维物理模型和数学模型,基于有限元分析法对上述实验获得的GIS母线壳体温度场分布规律进行了仿真佐证。研究结果表明,在GIS壳体内部靠上区域,SF6气体温差较小,梯度不明显,而在GIS壳体内部下方区域,SF6气体温度呈明显的梯度分布;靠近壳体的SF6气体温度和壳体温度趋于一致;对于外壳,其顶部和侧面温差不大,底部温度最低,沿着圆周方向从顶部到底部温度逐渐降低。上述研究可为揭示GIS内部温度场分布特性和确定温度感知最灵敏位置提供一定的指导意义。Gas insulated switchgear （GIS） is widely used in power system, the overheating of the internal contact will cause serious accidents, therefore the study of its temperature field distribution is particularly important. In this paper, the 252 kV GIS temperature-rise test platform is designed, and the temperature field distribution char- acteristics of conductor, SF6 gas and the shell are obtained. Specific to the above-mentioned GIS platform, the three-dimensional physical model and mathematical model are established. The finite element analysis method is used to simulate the temperature field distribution. The results show that the temperature of SF6 gas in the top of the GIS shell is not quite different, while there are obvious differences of the SF6 gas temperature in the area be- low the GIS shell. The SF6 gas temperature close to the shell is approximately identical with the shell. For the shell, the temperature difference between the top and side is small. The temperature at the bottom is the lowest and the temperature gradually drops along the circumferential direction from the top to the bottom. The above re- search can provide certain directive significance for revealing the temperature field distribution and determining the most sensitive temperature perception position in the GIS bus bar shell.

关 键 词：GIS 母线壳体 三维模型 温度场分布 有限元方法 

分 类 号：TM595[电气工程—电器]