[1]李少东,蔡汉生,陈怀飞,等.基于暂态电网络模型的杆塔接地装置冲击降阻优化措施研究[J].电瓷避雷器,2020,(01):123-128.[doi:10.16188/j.isa.1003-8337.2020.01.021]
 LI Shaodong,CAI Hansheng,CHEN Huaifei,et al.Research on Optimization Measures for the Impact Resistance Reduction of Tower Grounding Device Based on Transient Electric Network Model[J].,2020,(01):123-128.[doi:10.16188/j.isa.1003-8337.2020.01.021]
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基于暂态电网络模型的杆塔接地装置冲击降阻优化措施研究()
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《电瓷避雷器》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2020年01期
页码:
123-128
栏目:
避雷器
出版日期:
2020-02-20

文章信息/Info

Title:
Research on Optimization Measures for the Impact Resistance Reduction of Tower Grounding Device Based on Transient Electric Network Model
作者:
李少东1 蔡汉生2 陈怀飞1 刘 刚2 文习山1 胡上茂2 鲁海亮1
(1.武汉大学电气工程学院,武汉 430072; 2南方电网科学研究院,广州 51008)
Author(s):
LI Shaodong1 CAI Hansheng2 CHEN Huaifei1 LIU Gang2 WEN Xishan1 HU Shangmao2 LU Hailiang1
(1.School of Electrical Engineering Wuhan University, Wuhan 430072, China; 2.Electric Power Research Institute, CSG, Guangzhou 510080, China)
关键词:
电网络 有限差分 冲击接地
Keywords:
electric network FDTD impact grounding
DOI:
10.16188/j.isa.1003-8337.2020.01.021
摘要:
为研究接地装置冲击降阻的有效措施,本文建立了接地装置时域暂态电网络模型,考虑冲击电流作用下土壤电离的作用,通过高阶有限差分法求解得到了接地装置的冲击电压响应,仿真计算结果与试验测量结果误差在10%以内,证明了仿真模型的正确性。采用该模型分析了接地装置射线角度,布置形式及射线长度在冲击降阻中的效果差异,得到主要结论如下:方框带射线的伸长射线与方框边之间存在一定的屏蔽效应,带一/两组射线时,射线角度分别设为45°/0°; 接地装置射线布置型式需综合考虑射线有效散流长度及导体间屏蔽效应的作用; 增加射线长度对降阻的作用具有明显饱和效应。
Abstract:
In order to study the effective measures for the impact resistance reduction of grounding devices, a time-domain transient electric network model for grounding devices is established. Considering the effect of soil ionization under the impact current, the impact voltage response of the grounding device is obtained by the high order finite difference method. The error between the simulation results and the test results is less than 10%, which proves the correctness of the simulation model. This model is used to analyze the difference in the effect of the ray angle, layout and ray length of the grounding device in the impact reduction. The main conclusions are as follows: there is a certain shielding effect between the extension rays of the square frame band rays and the edge of the square frame. With one/two groups of rays, the radiographic angle should be set to 45/0 degrees respectively. The effective dispersion length of the ray and the shielding effect between the conductors shall be taken into consideration when making the radiation arrangement of the square band ray grounding device. And the effect of increasing the ray length on the drag reduction has obvious saturation effect.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-05-08作者简介:李少东(1994—),男,硕士,主要从事防雷接地方面的研究工作。
更新日期/Last Update: 2020-02-20