山西地磁台阵受晋南线高压直流输电接地极干扰的特征分析与处理  

Characteristic analysis and treatment of Shanxi geomagnetic array interfered by ground pole of HVDC transmission on Jinnan line

作　　者：范磊[1,2] 周建邦[1,2] 张亮娥 刘素珍[2,3] 郭宇[1,2] 史舒婷[1,2] 宫静芝 Fan Lei;Zhou Jianbang;Zhang Liang’e;Liu Suzhen;Guo Yu;Shi Shuting;Gong Jingzhi(Taiyuan Earthquake Monitoring Center Station,Shanxi Earthquake Agency,Shanxi Taiyuan 030025,China;National Continental Rift Valley Dynamics Observatory of Taiyuan,Shanxi Taiyuan 030025,China;Shanxi Earthquake Agency,Shanxi Taiyuan 030021,China)

机构地区：[1]山西省地震局太原地震监测中心站,山西太原030025 [2]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025 [3]山西省地震局,山西太原030021

出　　处：《地震科学进展》2024年第9期584-589,共6页Progress in Earthquake Sciences

基　　金：山西省地震局科研项目(SBK-2330-02)资助。

摘　　要：2014年9月山西省地震局与中国地震局地球物理研究所在山西北部恒山断裂带区域共同建设了地磁台阵,布设了5台GM4型磁通门磁力仪,安装于代县、山阴、应县、繁峙和怀仁,以获取区域场地磁三分量观测资料,台阵的5个测点位于高压直流输电晋南线接地极附近。通过对比山西地磁台阵5个测点GM4型磁通门磁力仪与其他台站地磁秒数据,量算出高压直流输电线路(晋北—南京)对山西地磁台阵地磁数据干扰幅度,对其进行相关性和误差分析,求得拟合公式。结果表明,山西地磁台阵受晋南线高压直流输电干扰,Z分量变化幅度随台站位置至晋南线垂直距离增加而减小,H、D分量干扰幅度与Z分量干扰幅度线性相关,以Z分量变化量为因变量,使用参考拟合公式求取的H、D分量变化量,可应用于山西地磁台阵受晋南线高压直流输电干扰的日常处理工作。In September 2014,Shanxi Earthquake Agency and the Institute of Geophysics,China Earthquake Administration jointly completed the construction of the geomagnetic station array in the Hengshan fault zone in the north of Shanxi.The geomagnetic station array is composed of 5 GM4 type fluxgate magnetometers,which are respectively installed in Daixian,Shanyin,Yingxian,Fanchi and Huairen to obtain the three-component magnetic field data in the observation area.The 5 measurement points of the geomagnetic station array are located near the grounding electrode of the Jinnan line of high-voltage direct current transmission.By comparing the GM4 type fluxgate magnetometer at the 5 measurement points of the geomagnetic station array with the geomagnetic second data of other stations,the interference amplitude of the high-voltage direct current transmission line(Jinbei-Nanjing)on the geomagnetic data of the Shanxi geomagnetic station array was measured,correlation and error analysis also were carried out,and the fitting formula was obtained.The results show that the variation amplitude of the Z component disturbed by the Jinnan line high-voltage direct current transmission in the Shanxi geomagnetic station array decreases as the vertical distance from the station location to the Jinnan line increases,and the interference amplitudes of the H and D components are linearly correlated with the interference amplitude of the Z component.Taking the variation of the Z component as the dependent variable,using the reference fitting formula to obtain the variation of the H and D components can be applied to the daily processing work of the magnetic field interference of the Shanxi geomagnetic station array under the influence of the Jinnan line high-voltage direct current transmission.

关 键 词：高压直流输电 线性分析 干扰幅度 

分 类 号：P315.63[天文地球—地震学]