Abstract：Contact temperature rise is closely relative with the operation condition and reliability of gas insulated busbars(GIB). Three-dimensional(3-D) eddy-current field model is established to calculate the power losses in the conducting components of GIB. As the heat source input, the power losses are used for the finite element analysis of fluid and thermal fields and the temperature distribution in GIB is obtained. In order to model the contact resistance and not to change the temperature distribution, the structure of contacts is properly simplified. Based on computational fluid dynamics(CFD), the multiple species transport technique is employed to calculate the convective heat transfer of different gases both inside and outside GIB, eliminating the iterative calculation of convective heat transfer coefficient. The temperature dependent contact resistance and thermal properties of gases are considered in the model. The reasonability of the simplification of contact resistance and the effectiveness of the coupled multi-physics method are validated with the comparison between the calculated and tested results. The proposed model will provide methodology and reference for overheat condition monitoring of GIB.
孙国霞, 舒乃秋, 吴晓文, 谢志杨, 金向朝, 彭辉. 基于多物理场耦合的气体绝缘母线触头接触温升有限元计算[J]. 电工技术学报, 2013, 28(2增): 408-413.
Sun Guoxia, Shu Naiqiu, Wu Xiaowen, Xie Zhiyang, Jin Xiangchao, Peng Hui. Finite Element Analysis of Contact Temperature rise in Gas Insulated Busbars based on Coupled Multi-physics. Transactions of China Electrotechnical Society, 2013, 28(2增): 408-413.
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2013, Vol. 28 
