华北大地涡旋电流现象机理及对管道管地电位影响
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摘要
一维分块大地周围的特定电性结构能够在该分块大地中产生涡旋电流。通过反演等效电流源并根据实际地形构造大地电性模型,分析了涡流处的等效电流和电性结构对其特性的影响,揭示了该特定区域中产生涡流并使得涡流移动的机理;对铺设在该区域中的输油管道给出了管地电位(PSP)的分布特征。计算得到的管道PSP与实际监测得到的管道PSP分布规律的一致性表明了涡旋电流能够加重地磁扰动对管道的影响。
The specific electrical structure around the homogeneous earth can generate eddy current in this homogeneous geology.In this paper,the equivalent current source is inverted from the data of several geomagnetic stations and the geoelectric model is constructed according to the actual topography.The research explores the influence caused by equivalent current and electrical structure on eddy current characteristics where the eddy current exists,and the mechanism of eddy current generation and eddy current movement in the specific area is revealed.Finally the distribution characteristics of pipe-soil potential(PSP)of oil pipelines laid in the area are calculated.The consistency between the calculated PSP and the observed PSP shows that the eddy can aggravate the influence of geomagnetic disturbance on the pipeline.
The specific electrical structure around the homogeneous earth can generate eddy current in this homogeneous geology.In this paper,the equivalent current source is inverted from the data of several geomagnetic stations and the geoelectric model is constructed according to the actual topography.The research explores the influence caused by equivalent current and electrical structure on eddy current characteristics where the eddy current exists,and the mechanism of eddy current generation and eddy current movement in the specific area is revealed.Finally the distribution characteristics of pipe-soil potential(PSP)of oil pipelines laid in the area are calculated.The consistency between the calculated PSP and the observed PSP shows that the eddy can aggravate the influence of geomagnetic disturbance on the pipeline.
引文
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[5]张蓬鹤,何俊佳,黄伟超,等.基于复镜像法的接地网地表电位分布计算[C]//中国电机工程学会高电压专业委员会2009年学术年会.2009.(Zhang Penghe,He Junjia,Huang Weichao,et al.Calculation of grounding grid surface potential distribution based on complex mirror method//2009Annual Meeting of High Voltage Professional Committee of CSEE.2009)
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[13]龚绍京,刘双庆,梁明剑.中国大陆地磁帕金森矢量特征及其与主要构造关系[J].地震学报,2017(1):47-63.(Gong shaojing,Liu shuangqing,Liang Mingjian.Characteristics of geomagnetic Parkinson vector in Chinese mainland and their tectonic implication.Acta Seismologica Sinice,2017(1))
[14]章鑫.中国大陆大地电流时空分布及涡旋现象研究[D].兰州:中国地震局兰州地震研究所,2016.(Zhangxin.The study of time and spatial distributed of tulluric currents and the vortex currents in mainland China.Lanzhou:Lanzhou Institute of Seismology,China Earthquake Administration,2016)
[15]梁志珊.一种埋地油气管道受地磁暴影响的GIC和PSP的计算方法:CN105260504B[P].2018-02-02.(Liang Zhishan.A calculation method of GIC and PSP for buried oil and gas pipeline affected by geomagnetic storm.CN105260504B.2018-02-02)
[2] Tay H C,Swift G W.On the problem of transformer overheating due to geomagnetically induced currents[J].IEEE Power Engineering Review,1985,5(1):48-49.
[3] Zheng K,Pirjola R J,Boteler D H,et al.Geoelectric fields due to small-scale and large-scale source currents[J].IEEE Trans Power Delivery,2013,28(1):442-449.
[4] Zheng K,Trichtchenko L,Pirjola R,et al.Effects of geophysical parameters on GIC illustrated by benchmark network modeling[J].IEEE Trans Power Delivery,2013,28(2):1183-1191.
[5]张蓬鹤,何俊佳,黄伟超,等.基于复镜像法的接地网地表电位分布计算[C]//中国电机工程学会高电压专业委员会2009年学术年会.2009.(Zhang Penghe,He Junjia,Huang Weichao,et al.Calculation of grounding grid surface potential distribution based on complex mirror method//2009Annual Meeting of High Voltage Professional Committee of CSEE.2009)
[6] Weaver J T.Electromagnetic induction in thin sheet conductivity anomalies at the surface of the earth[J].Proceedings of the IEEE,1979,67(7):1044-1050.
[7] Gilbert J L.Modeling the effect of the ocean-land interface on induced electric fields during geomagnetic storms[J].Space Weather-the International Journal of Research&Applications,2005,3(4):211.
[8]魏文博,谭捍东,金胜,等.华北中部岩石圈电性结构—应县-商河剖面大地电磁测深研究[J].地球科学,2002,27(5):645-650.(Wei Wenbo,Tan Handong,Jin Sheng,et al.Conductivity structure of lithosphere in Central North China:Magnetotelluric study of Yingxian-Shanghe profile.Earth Sicence,2002,27(5):645-650)
[9]徐光晶,汤吉,黄清华,等.华北地区上地幔及过渡带电性结构研究[J].地球物理学报,2015,58(2):566-575.(Xu Guangjing,Tang Ji,Huang Qinghua,et al.Study on the conductivity structure of the upper mantle and transition zone beneath North China.Chinese Journal of Geophysics,2015,58(2):566-575)
[10]詹艳,赵国泽,王立凤,等.河北石家庄地区深部结构大地电磁探测[J].地震地质,2011,33(4):913-927.(Zhan Yan,Zhao Guoze,Wang Lifeng,et al.Deep structure in Shijiazhuang and the vicinity by magnetotellurics,seismology and geology,2011,33(4):913-927)
[11] Püthe C,Kuvshinov A,Khan A,et al.A new model of Earth’s radial conductivity structure derived from over 10yr of satellite and observatory magnetic data[J].Geophysical Journal International,2016,203(3):1864-1872.
[12]喻克智.山西地质构造及地震活动特征[J].山西地震,1977(1):48-55.(Yu Kezhi.Geological tectonics and seismic activity characteristics of Shanxi province.Earthquake Research in Shanxi,1977(1):48-55)
[13]龚绍京,刘双庆,梁明剑.中国大陆地磁帕金森矢量特征及其与主要构造关系[J].地震学报,2017(1):47-63.(Gong shaojing,Liu shuangqing,Liang Mingjian.Characteristics of geomagnetic Parkinson vector in Chinese mainland and their tectonic implication.Acta Seismologica Sinice,2017(1))
[14]章鑫.中国大陆大地电流时空分布及涡旋现象研究[D].兰州:中国地震局兰州地震研究所,2016.(Zhangxin.The study of time and spatial distributed of tulluric currents and the vortex currents in mainland China.Lanzhou:Lanzhou Institute of Seismology,China Earthquake Administration,2016)
[15]梁志珊.一种埋地油气管道受地磁暴影响的GIC和PSP的计算方法:CN105260504B[P].2018-02-02.(Liang Zhishan.A calculation method of GIC and PSP for buried oil and gas pipeline affected by geomagnetic storm.CN105260504B.2018-02-02)