雷电流频率与土壤电阻率关系的研究  

Research on Relationship between Frequency of Lightning Current and Soil Resistivity

作　　者：丁志敏[1] 李桂铭 

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]湖南电力建设监理咨询有限责任公司,湖南长沙410002

出　　处：《陕西电力》2015年第2期35-38,44,共5页Shanxi Electric Power

基　　金：国家自然科学基金项目资助(51207114)

摘　　要：为研究雷电流频率与土壤电阻率之间的关系,分析讨论了直流对土壤极化的影响,以及土壤介电常数、土壤电阻率与雷电流频率的关系。利用土壤电阻率与雷电流频率的函数关系,采用仿真软件MATLAB,仿真绘制了ρ_(dc)=50Ω·m和ρ_(dc)=1 000Ω·m时,砂粒、粉粒和粘粒三种土壤电阻率随雷电流频率的变化曲线图。结果表明:三种土壤电阻率与频率的关系近似符合非线性规律;当雷电流频率为40 kHz时,土壤电阻率趋于稳定。To study the relationship between the frequency of lightning current and soil resistivity,the paper analyzes and discusses the influence of DC on soil polarization as well as the relationship among soil dielectric constant,soil resistivity and lightning current frequency.By using MATLAB,the paper simulates and gives the curve of sand,silt and clay soil resistivity changing with the lightning current frequency under the ρdc of 50 Ω·m and 1 000 Ω·m.The results show that the relationship between the soil resistivity and the frequency is consistent with nonlinear law approximately as well as the soil resistivity tends to be stable when the lightning current is at a frequency of 40 kHz.

关 键 词：土壤 极化 土壤介电常数 复电阻率 雷电流主导频率 

分 类 号：TM743[电气工程—电力系统及自动化]