华北大地涡旋电流现象机理及对管道管地电位影响

梁志珊; 肖霄; 罗雄麟; 左信; 毕武喜; 蓝卫

doi:10.11884/HPLPB201931.190120

华北大地涡旋电流现象机理及对管道管地电位影响

doi: 10.11884/HPLPB201931.190120

1.
中国石油大学(北京) 信息科学与工程学院, 北京 102249
2.
中石油管道科技研究中心, 河北廊坊 065000

基金项目:

国家重点研发计划项目 2016YFC0800100

详细信息

作者简介:
梁志珊(1958—), 男, 博士, 教授, 从事地磁暴对埋地油气管道设备影响研究, 1972601365@qq.com

中图分类号: TE832
计量
- 文章访问数: 1600
- HTML全文浏览量: 384
- PDF下载量: 67
- 被引次数: 0
出版历程
- 收稿日期: 2019-04-19
- 修回日期: 2019-06-03
- 刊出日期: 2019-07-15

Geodetic interface algorithm for evaluating geomagnetic storms in pipelines

1.
College of Information Science and Engineering, China University of Petroleum (Beijing), Beijing 102249, China
2.
PetroChina Pipeline Research and Development Center, Langfang 065000, China

摘要

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。
- 地磁扰动 /
- 等效电流源 /
- 涡旋电流 /
- 大地电导率 /
- 管地电位
Abstract: 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.
- magnetic storm /
- equivalent current source /
- eddy current /
- earth conductivity /
- pipe-soil potential

HTML全文

图 1 等效电流源方向示意

Figure 1. Direction indication of equivalent current source

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图 2 确定等效电流方向

Figure 2. Determination of equivalent current direction

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图 3 华北大地电导率模型

Figure 3. Geoelectric conductivity model in North China

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图 4 帕金森矢量推测涡流结果

Figure 4. Parkinson vector estimation of eddy current

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图 5 仿真结果

Figure 5. Simulation result

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图 6 涡旋电流按频率移动图示

Figure 6. Eddy current moving by frequency

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图 7 涡旋电流按频率移动图示

Figure 7. Eddy current changes with direction

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图 8 拟合地磁

Figure 8. Reconstruction of geomagnetism

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图 9 PSP随管线分布

Figure 9. Distribution of pipe-soil potential (PSP)

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图 10 兖州站和平邑站PSP和GIC随时间分布图

Figure 10. Time distribution of PSP and GIC at Pingyi station and Yanzhou station

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图 11 兖州站和平邑站的现场监测结果

Figure 11. On-site monitoring data of Yanzhou station and Pingyi station

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图 12 电流涡旋位置

Figure 12. Location of eddy current

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参考文献(15)

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