Abstract：If the transverse dimension of the coaxial structure is much less than the wavelength of the electromagnetic wave, the effects of electric field distortion in the region of abrupt change of radius can be considered as a compensation capacitance. A theoretical model based on the method of variable separation for the calculation of the compensation capacitance was derived in this paper. The effects of the radii of both the inner and outer conductors on the composition capacitance were investigated. The validation of this model was verified by a comparison with the FEM simulation. The effectiveness of an analytical formula resulted from the parallel-plate structure when used to approximate the present structure was discussed. In addition, an numerical example was provided to analyze the effect of the capacitor on the waveform characteristics of a time domain pulse.
焦重庆, 李明洋. 同轴结构半径突变处补偿电容的计算分析[J]. 电工技术学报, 2015, 30(增刊2): 1-6.
Jiao Chongqing, Li Mingyang. Calculation and Analysis of Compensation Capacitance Caused by Radius Discontinuities in Coaxial Structure. Transactions of China Electrotechnical Society, 2015, 30(增刊2): 1-6.
[1] Marcuvitz N. Waveguide handbook[M]. New York: Mcgraw-Hill, 1951. [2] Ramo S, Whinnery J R. Fields and waves in modern radio[M]. New York: John Wiley & Sons, 1953. [3] Whinnery J R, Jamieson H W. Equivalent circuits for discontinuities in transmission lines[J]. Proceedings of the IRE, 1944, 32(2): 98-114. [4] Whinnery J R, Jamieson H W, Robbins T E. Coaxial-line discontinuities[J]. Proceedings of the IRE, 1944, 32(11): 695-709. [5] 胡榕, 崔翔, 陈维江, 等. 特高压气体绝缘开关设备瞬态外壳电压特性的试验研究[J]. 中国电机工程学报, 2014, 34(29): 5244-5258. Hu Rong, Cui Xiang, Chen Weijiang , et al. Experimental research on the characteristics of transient enclosure voltage in ultra high voltage gas insulated switchgear[J]. Proceedings of the CSEE, 2014, 34(29):5244-5258. [6] 吴昊, 李成榕, 徐海瑞, 等. 用于VFTO测量的GIS窗口式传感器[J]. 电工技术学报, 2012, 27(9): 210- 217. Wu Hao, Li Chengrong, Xu Hairui, et al. Method for measurement of VFTO based on GIS disk sensor[J]. Transactions of China Electrotechnical Society, 2012, 27(9): 210-217. [7] 孟涛, 林莘, 徐建源. 分段电弧模型下VFTO的计算与分析[J]. 电工技术学报, 2010, 25(9): 69-73. Meng Tao, Lin Xin, Xu Jianyuan. Calculation of very fast transient over-voltage on the condition of segmental arcing model[J]. Transactions of China Electrotechnical Society, 2010, 25(9): 69-73. [8] 倪光正. 工程电磁场原理[M]. 2版. 北京: 高等教育出版社, 2009. [9] Harrington R F. Time-harmonic electromagnetic Fields[M]. New York: Wiley-IEEE Press, 2001. [10] 张善杰. 矢量函数、圆柱函数和球函数[M]. 南京:南京大学出版社, 2011. [11] 王泽忠, 全玉生, 卢斌先. 工程电磁场[M]. 北京:清华大学出版社, 2004. [12] 王竹溪, 郭敦仁. 特殊函数概论[M]. 北京: 北京大学出版社, 2012. [13] 胡仁喜, 孙明礼. ANSYS13.0电磁学有限元分析从入门到精通[M]. 北京: 机械工业出版社, 2011. [14] 龙非池, 王慧. 基于Schwarz-Christoffel变换的平板电容器电场电荷分布仿真[J]. 物理与工程, 2007, 17(6): 25-27. Long Feichi, Wang Hui. Simulation on the distribution of electric field and charges of flat capa- citor based on schwarz-christoffel transformation[J]. Physics and Engineering, 2007, 17(6): 25-27. [15] 吴文辉, 曹祥麟. 电力系统电磁暂态计算与EMTP应用[M]. 北京: 中国水利水电出版社, 2012. [16] 杨琳, 吴广宁, 田晓菲. 基于EMTP的水平接地体冲击时-频特性分析[J]. 电工技术学报, 2011, 26(6): 194-198. Yang Lin, Wu Guangning, Tian Xiaofei. Analysis of impulse characteristic grounding electrode in frequency and time domain based on EMTP[J]. Transactions of China Electrotechnical Society, 2011, 26(6): 194-198.
2015, Vol. 30 
