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| Calculation and Analysis of Substation Grounding Grid Parameters |
| Qin Dahai1, Dai Yusong1, Xu Wen1, Huang Manyi2, Jiang Yuhan1 |
1. School of Electrical and Information Engineering, Xihua University, Chengdu 610039;
2. Chengdu Power Supply Company, Chengdu 610041 |
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Abstract Method of calculation of grounding grid parameters mainly includes two categories: empirical formulas and numerical calculations. However, the conventional method of calculation can only calculate the frequency grounding resistance of grounding grid, and to accurately assess the safety of grounding grid or not, the potential distribution of grounding grid, the potential gradient distribution, contact voltage, step voltage, etc. is also essential parameters. In this paper based on constant current field theory, the application of surface charge method and boundary element method used to prepare the ground Netcom calculation program, which not only can calculate the resistance of the grounding grid, but also calculate the surface potential distribution and other parameters. The same time with the data processing software to draw a three-dimensional surface plot got potential distribution and the potential gradient distribution histogram, grayscale and contour plots. By 220kV substation grounding grid, for example, to verify the accuracy and feasibility of this approach can provide the basis for the safety assessment of the substation ground grid.
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Published: 22 December 2014
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[1] 李雷. 接地参数计算与接地网频率响应特性下的研究[D]. 长沙: 长沙理工大学硕士论文, 2010.
[2] 李欣. 接地网地面电位分布及梯度分布的计算研究[D]. 成都: 西华大学硕士论文, 2010.
[3] 何金良, 曾嵘. 电力系统接地技术[M]. 科学出版社, 2007(2).
[4] 张波, 崔翔, 赵志斌, 等. 大型变电站接地网的频域分析方法[J]. 中国电机工程学报, 2002, 22(9): 59-63.
[5] 鲁志伟, 文习山, 史艳铃, 等. 大型变电站接地网工频接地参数的数值计算[J]. 中国电机工程学报, 2003, 23(12)9: 89-92.
[6] 解广润. 电力系统接地技术[M]. 北京: 科学出版社, 2007.
[7] 李景禄,等. 实用电力接地技术[M]. 中国电力出版社, 2002(1).
[8] 窦鑫, 何金良, 曾嵘. 变电所接地阻抗的感性分量分析[J]. 高压电器, 2004,40(4): 245-246.
[9] 鲁志伟, 常树生, 张久禄. 大型变电站接地网的网内电位差[J]. 电力建设, 2004(9): 39-40.
[10] LIN L.Influence of soil and conducter of ground grid on satey of the grounding system. IEEE 2000.
[11] American National Standards Institute.IEEE Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System. 1983.
[12] 钱金忠.220kV接地网改造的技术问题研究[D]. 南京:[12] 东南大学工程硕士学术论文, 2006.
[13] 甘艳, 阮江军, 陈允平. 短路故障下接地网电位分布的讨论[J]. 华北电力, 2003(12): 7-10. |
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2014, Vol. 15 
