电工技术学报  2022, Vol. 37 Issue (5): 1070-1077    DOI: 10.19595/j.cnki.1000-6753.tces.201727
电工理论 |
考虑地下各向异性介质的磁暴感应地电场研究
王泽忠1, 司远1, 刘连光2
1.华北电力大学高电压与电磁兼容北京市重点实验室 北京 102206;
2.华北电力大学电气与电子工程学院 北京 102206
Study on the Induced Geoelectric Field of Geomagnetic Storm Considering the Underground Anisotropic Medium
Wang Zezhong1, Si Yuan1, Liu Lianguang2
1. Beijing Key Laboratory of High Voltage and EMC North China Electric Power University Beijing 102206 China;
2. School of Electrical and Electronic Engineering North China Electric Power University Beijing 102206 China
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摘要 地质勘测资料表明,地下存在电性各向异性介质,因此在研究地磁扰动(GMD)地电场时需要考虑各向异性介质的影响。建立包含各向异性介质的大地电导率模型,研究电性结构不均匀及各向异性介质对地电场分布的影响。结合新疆地区部分数据构建各向异性大地电导率模型计算GMD地电场。通过各向同性大地电导率模型对比,发现各向异性区域内主轴电导率的变化将会对该区域内相应方向上的地电场及周边的地电场产生影响,其变化规律与各向异性区域周边存在的高导或高阻体相关。结合电网结构参数得到地磁感应电流(GIC),证明虽然地下各项异性介质对地表感应地电场的大小影响较小,但由于计算GIC时通过地电场沿输电线路积分得到等效电压源,存在误差的累积,将使GIC的计算误差增大。
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王泽忠
司远
刘连光
关键词 地电场各向异性大地电性结构地磁感应电流    
Abstract:Geological survey data show that there are electrically anisotropic media underground, so the influence of anisotropic media should be considered when studying the geomagnetic disturbance (GMD) geoelectric field. The earth conductivity model including anisotropic medium is established to study the influence of uneven electrical structure and anisotropic medium on the distribution of earth electric field. Combined with the data in Xinjiang, an anisotropic conductivity model is constructed to calculate the GMD geoelectric field. Compared with the isotropic earth conductivity model, it is found that the change of principal axis conductivity in the anisotropic region will affect the geoelectric field in the corresponding direction and the surrounding geoelectric field in the region, and its change law is related to the high conductivity or high resistance area around the anisotropic region. The geomagnetically induced current (GIC) is obtained by combining the structural parameters of the power grid. It is proved that although anisotropic media have little influence on the size of the surface induced geoelectric field, the calculation error of GIC will increase due to the accumulation of errors due to the equivalent voltage source obtained by integrating the geoelectric field along the transmission line when calculating the GIC.
Key wordsGeoelectric field    anisotropy    geoelectric structure    geomagnetically induced current   
收稿日期: 2020-12-11     
PACS: TM155  
通讯作者: 司 远 男,1993年生,博士研究生,研究方向为电网安全运行与灾变控制。E-mail:siy@ncepu.edu.cn   
作者简介: 王泽忠 男,1960年生,博士,教授,博士生导师,研究方向为电力系统电磁兼容和电磁场数值计算。E-mail:wzzh@ncepu.edu.cn
引用本文:   
王泽忠, 司远, 刘连光. 考虑地下各向异性介质的磁暴感应地电场研究[J]. 电工技术学报, 2022, 37(5): 1070-1077. Wang Zezhong, Si Yuan, Liu Lianguang. Study on the Induced Geoelectric Field of Geomagnetic Storm Considering the Underground Anisotropic Medium. Transactions of China Electrotechnical Society, 2022, 37(5): 1070-1077.
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