[1]李景丽,郭丽莹,武东亚,等.考虑土壤电离的接地装置冲击特性分析[J].郑州大学学报(工学版),2016,37(04):20-25.[doi:10.13705/j.issn.1671-6833.2016.04.005]
　Li Jingli,Guo Liying,Wu Dongya,et al.The Analysis of the Grounding Device’s Impulse Characteristics Considering Transient Ionization Phenomenon of Soil[J].Journal of Zhengzhou University (Engineering Science),2016,37(04):20-25.[doi:10.13705/j.issn.1671-6833.2016.04.005]
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考虑土壤电离的接地装置冲击特性分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
37卷
期数:
2016年04期
页码:
20-25
栏目:
出版日期:
2016-08-31

文章信息/Info

Title:
The Analysis of the Grounding Device’s Impulse Characteristics Considering Transient Ionization Phenomenon of Soil
作者:
李景丽; 郭丽莹; 武东亚; 王磊磊; 李渊博
1.郑州大学电气工程学院,河南郑州,4500012.国网河南省电力公司河南电力调度控制中心,河南郑州,450052
Author(s):
Li Jingli1; Guo Liying1; Wu Dongya2; Wang Leilei1; Li Yuanbo1
1. School of Electrical Engineering, Zhengzhou University, Zhengzhou, Henan, 450001; 2. Henan Power Dispatching and Control Center of State Grid Henan Electric Power Company, Zhengzhou, Henan, 450052
关键词:
接地装置; 冲击特性; 土壤电离; 有限元分析
Keywords:
DOI:
10.13705/j.issn.1671-6833.2016.04.005
文献标志码:
A
摘要:
试验及实际运行经验表明,接地装置冲击特性是影响输电线路耐雷性能的重要因素.笔者以土壤电离过程中的动态、分布式土壤参数为基础,对典型接地装置建立冲击特性有限元模型;根据仿真计算结果与模拟试验结果从电磁场角度分析了典型接地装置的冲击散流机理及散流规律;同时定量计算了冲击电流作用下土壤参数及注入电流参数对土壤电离区域体积的影响规律,在此基础上分析了土壤电离对典型接地装置接地电阻、跨步电压、接触电压等接地参数的影响.结果表明,土壤电离现象对冲击散流特性和冲击接地参数的影响在高幅值注入电流、高电阻率地区更明显.该研究结果可为输电线路冲击接地降阻新措施的提出提供理论支持.
Abstract:
Experiments and actual operation experience show that the impact characteristics of grounding devices are an important factor affecting the lightning performance of transmission lines. Based on the dynamic and distributed soil parameters in the process of soil ionization, the author establishes a finite element model of impact characteristics for typical grounding devices; according to the simulation The calculation results and simulated test results analyzed the impact flow mechanism and flow law of typical grounding devices from the perspective of electromagnetic field; at the same time, the impact law of soil parameters and injection current parameters on the volume of soil ionization area under the action of impact current was quantitatively calculated. The impact of soil ionization on grounding parameters such as grounding resistance, step voltage, and contact voltage of typical grounding devices is analyzed above. The results show that the impact of soil ionization on the characteristics of shock dispersion and shock grounding The area is more obvious. The research results can provide theoretical support for the proposal of new measures to reduce the resistance of transmission line impact grounding.
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