大地电导率对GMD感应地电场的影响规律研究  

Study on the Influence of Earth Conductivity on GMD Induced Geoelectric Field

作　　者：刘青[1] 徐婷[1] 韩康康[1] 戎娅婕 

机构地区：[1]西安科技大学,陕西西安710054 [2]新疆电力设计院,新疆乌鲁木齐830001

出　　处：《电网与清洁能源》2017年第6期54-58,66,共6页Power System and Clean Energy

基　　金：国家重点研发计划项目(2016YFC0800103)~~

摘　　要：鉴于深层大地电导率参数难以获得,研究GMD感应地电场对大地电导率的敏感性对GIC评估及防护更具指导意义。基于平面波法,研究了不同大地模型对感应地电场的影响规律。结果表明高阻地区出现的感应地电场幅值更大,不同地区东西向与南北向感应地电场大小关系不仅与纬度有关,同时与大地模型特点有关;对于多层大地电导率模型,感应地电场幅值对顶层电导率更敏感,且随着底层电导率的减小,影响规律越明显。Given that the deep earth conductivity parame- ters are difficult to obtain, studies on the sensitivity of GMD induced electrie field to the earth conductivity are of more guid- ing significance for the GIC assessment and prevention. In this paper, the influence of different earth models on the induced electric field is studied based on the plane wave method. The results show that the amplitude of the induced field is larger in high resistance region. The relation between east-west and north-south induced electric field is related not only to the lati- tude but also to the characteristics of the earth model. For the multi-layer earth conductivity model, the amplitude of induced electric field is more sensitive to the top-layer conductivity, and the influence rule is more obvious with bottom conductivity reducing.

关 键 词：地磁扰动 感应地电场 大地电导率 磁暴 地磁感应电流 

分 类 号：TM154.1[电气工程—电工理论与新技术]