[1]李景丽,贺鹏威,邱再森,等.土壤电参数频变性对接地体有效长度的影响分析[J].郑州大学学报(工学版),2017,38(04):29-34.[doi:10.13705/j.issn.1671-6833.2017.01.016]
　Li Jingli,He Pengwei,Qiu Zaisen,et al.Analysis of the Influence of Soil Electrical Parameters Frequency-dependence Characteristics on the Effective Length of the Grounding Electrode[J].Journal of Zhengzhou University (Engineering Science),2017,38(04):29-34.[doi:10.13705/j.issn.1671-6833.2017.01.016]
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土壤电参数频变性对接地体有效长度的影响分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
38
期数:
2017年04期
页码:
29-34
栏目:
出版日期:
2017-07-18

文章信息/Info

Title:
Analysis of the Influence of Soil Electrical Parameters Frequency-dependence Characteristics on the Effective Length of the Grounding Electrode
作者:
李景丽; 贺鹏威; 邱再森; 李渊博; 郭丽莹
郑州大学电气工程学院,河南郑州,450001
Author(s):
Li Jingli;  He Pengwei;  Qiu Zaisen;  Li Yuanbo;  Guo Liying
School of Electrical Engineering, Zhengzhou University, Zhengzhou, Henan 450001
关键词:
频变性; 接地体; 傅里叶变换; CDEGS; 有效长度
Keywords:
DOI:
10.13705/j.issn.1671-6833.2017.01.016
文献标志码:
A
摘要:
接地装置冲击特性是影响输电线路耐雷水平和雷击跳闸率的重要因素.将电力系统接地分析软件CDEGS中的快速傅里叶变换模块FFTSES和电磁场频域分析模块HIFREQ相结合,通过引入Visacro-Alipio土壤频变公式,建立可以考虑土壤电参数频变性的接地装置冲击特性的数值计算模型.利用所建模型重点仿真分析不同土壤电阻率和不同冲击电流波形下土壤电参数频变特性对接地装置有效长度的影响情况.仿真数据分析表明,考虑土壤频变性时接地装置的有效长度与不考虑土壤频变性时的有效长度相比有一定减小,并且在高土壤电阻率下减小程度更明显.
Abstract:
Impulse charactersitic of grounding devices was the important factor of lightning withstand level and lightning trip-out rate of transmission line.Based on HIFREQ program and FFTSES program in grounding power system analysis software CDEGS,this paper presented a grounding system impulse characteristic modeling considered soil frequency-dependence,especially,the Visacro-Alipio soil frequency-dependence formula has been introduced.The impact of the soil frequency-dependence on the effective length of the grounding device in different initial soil resistivity and different impulse current waveform was analyzed.The calculating results showed that when considering soil frequency-dependence,the impulse effective length would be shorter,especially for the grounding devices buried in high resistivity soil.
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