Abstract：As an important part of power generation system, the dynamic and thermal stability of enclosed isolated phase bus (EIPB) under extreme working condition such as short-circuit current. The analysis of dynamic-thermal stability for EIPB becomes a key point in the design process for cooling system. For the large size and complex structure of EIPB, especially the thin shell and plenty of Sharp body, mesh results seems to be poor at most situation in FEM calculation. A method of bus segment joint simulation method is proposed. The whole bus model is divided into several sub-segments. The temperature rise and temperature gradient distribution of the transfer interface are adopted among the sub-models cased on the unified matrix. The key parameters such as conduction convection coefficient are obtained by experimental verification based on theoretical calculation. The evaluation method of the model linkage simulation is studied. This simulation method is applied to the analysis of a type of EIPB. Moreover, the temperature rise under cooling condition are calculated using this method. The temperature rise distribution of bus in natural cooling condition and certain air cooling condition is obtained. On this basis, the calculation model of bus dynamic stability under short circuit condition is established, and the electrodynamic force under short circuit current is verified, which proves the feasibility of this analysis method.
[1] IEEE 605—1998 IEEE Guide for the Design of Substation Rigid-Bus Structures[S]. 1998. [2] 郭雨豪, 薛永端, 徐攀, 等. 含同母线环路的配电网单相接地故障特征及选线[J]. 电力系统自动化, 2019, 43(1): 234-242. Guo Yuhao, Xue Yongrui, Xu Pan, et al.Characteristic and feeder selection of single-phase grounding fault in distribution network with the same bus loop[J]. Automation of Electric Power Systems, 2019, 43(1): 234-242. [3] Labridis D P, Dokopoulos P S.Electromagnetic forces in three-phase rigid busbars with rectangular cross-sections[J]. IEEE Transactions on Power Delivery, 1996, 11(2): 793-800. [4] Triantafyllidis D G, Dokopoulos P S, Labridis D P.Parametric short-circuit force analysis of three-phase busbars-a fully automated finite element approach[J]. IEEE Transactions on Power Delivery, 2003, 18(2): 531-537. [5] Yang J, Liu Yuan, Hu Degui, et al.Transient electromagnetic force analysis of GIS bus based on FEM[C]// 2016 International Conference on Condition Monitoring and Diagnosis (CMD), Xi'an, 2016: 554-557. [6] Guan Xiangyu, Shu Naiqiu.Electromagnetic field and force analysis of three-phase enclosure type GIS bus capsule[C]// 2014 IEEE PES T&D Conference and Exposition, Chicago, 2014: 1-4. [7] 严兆君, 吴军. 大容量离相封闭母线轴向焊接与电动力分析[J]. 高压电器, 2015, 51(7): 78-86. Yan Zhaojun, Wu Jun.Analyses on axial welding and electromagnetic force of large capacity enclosure type isolated-phase bus[J]. High Voltage Apparatus, 2015, 51(7): 78-86. [8] 白志胜, 陈建兵, 忻尚芝. 铜铝复合母线短时耐受能力研究[J]. 电子科技, 2016, 29(2): 109-111. Bai Zhisheng, Chen Jianbing, Xin Shangzhi.Short-time withstand capability of copper aluminum composite bus bar[J]. Electronic Science and Technology, 2016, 29(2): 109-111. [9] Labridis D P, Dokopoulos P S.Electromagnetic forces in three-phase rigid busbars with rectangular cross-sections[J]. IEEE Transactions on Power Delivery, 1996, 11(2): 793-800. [10] Popa I C, Dolan A I.Numerical modeling of three-phase busbar systems: Calculation of the thermal field and electrodynamic forces[C]// 2016 International Conference on Applied and Theoretical Electricity (ICATE), Craiova, 2016: 1-9. [11] 李江涛, 孙义, 李擎宇, 等. 大电流开关柜温度分布特性的影响因素分析[J]. 电气技术, 2018, 19(9): 13-18. Li Jiangtao, Sun Yi, Li Qingyu, et al.Analysis of influencing factors on temperature distribution characteristics of high current switchgear[J]. Electrical Engineering, 2018, 19(9): 13-18. [12] 陈彪, 罗东豪, 王嗣翔, 等. 新型节能铜包铝管母线的温升分析与实验[J]. 电气技术, 2018, 19(3): 85-89. Chen Biao, Luo Donghao, Wang Sixiang, et al.The temperature analysis and experiment of the new-type energy-saving copper-clad aluminum busbar[J]. Electrical Engineering, 2018, 19(3): 85-89. [13] 宁宇, 孙洪宇, 张伟, 等. GIS 高压母线段间连接缝隙造成的过热分析[J]. 电工技术学报, 2017, 32(1): 217-224. Ning Yu, Sun Hongyu, Zhang Wei, et al.Overheat analysis on the connection gap in GIS with the sections connected by bolts[J]. Transactions of China Electrotechnical Society, 2017, 32(1): 217-224. [14] 陈强, 李庆民, 丛浩熹, 等. 引入多重边界条件的 GIS母线温度分布多场耦合计算及影响因素分析[J]. 电工技术学报, 2016, 31(17): 187-195. Chen Qiang, Li Qingmin, Cong Haoxi, et al.Numerical calculation and correlative factors analysis on temperature distribution of GIS bus bar based on coupled multi-physics methodology combined with multiple boundary conditions[J]. Transactions of China Electrotechnical Society, 2016, 31(17): 187-195. [15] 杨国清, 魏帅, 王得意, 等. 纳米改性环氧树脂绝缘型封闭母线的温升特性研究[J]. 大电机技术, 2016(5): 56-60. Yang Guoqing, Wei Shuai, Wang Deyi, et al.Research on temperature rise of nano-modified epoxy resin insulated enclosed bus[J]. Large Electric Machine and Hydraulic Turbine, 2016(5): 56-60. [16] 孙国霞, 舒乃秋, 吴晓文, 等. 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): 408-413. Sun Guoxia, Shu Naiqiu, Wu Xiaowen, et al.Finite element analysis of contact temperature rise in gas insulated busbars based on coupled multi-physics[J]. Transactions of China Electrotechnical Society, 2013, 28(2): 408-413. [17] 李彦彰, 舒乃秋, 刘亚男, 等. 基于外壳热分布的气体绝缘母线温度计算模型[J]. 电测与仪表, 2017, 54(18): 111-117. Li Yanzhang, Shu Naiqiu, Liu Ya'nan, et al. Thermal-circuit calculation model of gas insulated bus temperature based on heat distribution of tank[J]. Electrical Measurement and Instrumentation, 2017, 54(18): 111-117. [18] Leung C H, Lee A, Wang Bor-Jenq.Thermal modeling of electrical contacts in switches and relays[J]. IEEE Transactions on Components, Packaging, and Manufacturing Technology: Part A, 1996, 19(3): 346-352. [19] Guo Bin, Song Zhiquan, Fu Peng, et al.Thermal dissipation modelling and design of ITER PF converter alternating current busbar[J]. Plasma Science and Technology, 2016, 18(10): 1049-1054. [20] Kadkhodaei G, Sheshyekani K, Hamzeh M, et al.Multiphysics analysis of busbars with various arrangements under short-circuit condition[J]. IET Electrical Systems in Transportation, 2016, 6(4): 237-245. [21] Kadkhodaei G, Sheshyekani K, Hamzeh M.Coupled electric-magnetic-thermal-mechanical modelling of busbars under short-circuit conditions[J]. IET Generation, Transmission & Distribution, 2016, 10(4): 955-963. [22] Jin Lei, Zhong Jianying, Wu Shijin, et al.A 3-D steady-state analysis of thermal behavior in EHV GIS busbar[J]. Journal of Electrical Engineering and Technology, 2016, 11(3): 781-789. [23] 纽春萍, 赵鹏, 吴翊, 等. 基于Ansys 的强迫风冷封闭母线热分析[J]. 高电压技术, 2018, 44(7): 1-6. Niu Chunping, Zhao Peng, Wu Yi, et al.Thermal analysis of forced air-cooled enclosed bus based on Ansys[J]. High Voltage Engineering, 2018, 44(7): 1-6. [24] 金向朝, 谢志杨, 刘秀甫, 等. 基于有限元法的三相同壳结构 GIS 母线热分析[J]. 武汉大学学报(工学版), 2013, 46(5): 654-658. Jin Xiangchao, Xie Zhiyang, Liu Xiufu, et al.Thermal analysis of three-phase enclosed GIS bus bar based on finite-element method[J]. Engineering Journal of Wuhan University, 2013, 46(5): 654-658. [25] 吴晓文. 气体绝缘母线温升计算及监测方法的研究[D]. 武汉:武汉大学, 2013. [26] 陈亦平, 李崇涛, 杨若朴, 等. 云南异步电网中频率振荡的分段线性模型分析方法[J]. 电力系统自动化, 2020, 44(6): 186-197. Chen Yiping, Li Chongtao, Yang Ruopu, et al.Analysis method of piecewise linear model for frequency oscillation in asynchronous power grid of Yunnan in China[J]. Automation of Electric Power Systems, 2020, 44(6): 186-197.
2020, Vol. 35 
