直流输电系统对地磁观测的干扰
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摘要
直流输电系统对临近地磁台站的地磁观测造成了很大的干扰。基于地磁观测仪器的工作原理,分析了直流线路影响地磁观测的原因,认为直流线路上承载电流产生的磁场附加到仪器观测的空间磁场导致了对地磁观测的干扰。采用CDEGS软件,仿真计算了直流系统接地极的入地电流和导线上电流对地磁观测的影响,认为线路不平衡电流是干扰地磁观测的根本原因。
The significant interference on gemagnetic observation station from DC transmission system has been occurred in China.Based on the principle of geomagnetic observation instrument,the impact of interference is analyzed,which is the magnetic field of current on DC transmission system is attached to the observed magnetic field of geomagnetic observation instrument.The interference from current on earth electrode and on power lines are calculated based on CDEGS software.The result shows that the reason of interference on geomagnetic field observation is due to the imbalance current on power lines.
The significant interference on gemagnetic observation station from DC transmission system has been occurred in China.Based on the principle of geomagnetic observation instrument,the impact of interference is analyzed,which is the magnetic field of current on DC transmission system is attached to the observed magnetic field of geomagnetic observation instrument.The interference from current on earth electrode and on power lines are calculated based on CDEGS software.The result shows that the reason of interference on geomagnetic field observation is due to the imbalance current on power lines.
引文
中国国家标准化管理委员会.GB/T 19531.2-2004地震台站观测环境技术要求第2部分:电磁观测[S].北京:中国标准出版社,2004.
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郝长安,赵伦,倪友忠,等.葛洲坝-南桥直流输电线路对地磁台的影响[J].地震地磁观测与研究,2008,29(5):9-15.
胡聿贤.地震工程学[M].北京:地震出版社,2006.
KAPPENMAN J G,ALBERTSON V D.Bracing for The Geomagnetic Storms[J].IEEE Spectrum,1990,27(3):27-33.
RISTO P.Geomagnetically Induced Currents During Magnetic Storms[J].IEEE Transaction on Plasma Science,2000,28(6):1867-1873.
ALBERTSON V D,THORSON J M,CLAYLON R E,et al.Solar Induced Currents in Power System:Cause and Effects[J].IEEE Transaction on Power Apparatus andSystems,1973,PAS-92(2):471-477.
JOHN G K.Storm Sudden Commencement Events and Associated Geomagnetically Induced Current Risks to Ground-based Systems at Low-latitude and Midlatitude Location[sJ].Space Weather,2003,1(3):1016-1020.
RADASKY W A,KAPPENMAN J G.Impacts of Geomagnetic Storms on EHV and UHV Power Grids[C]//2010 Asia-pacific International Symposium onElectromagnetic Compatibility,Beijing:2010:695-698.
TRICHTCHENKO L,BOTELER D H.Effects of Recent Geomagnetic Storms on Power Systems[C]//7th International Symposium on Electromagnetic Compatibilityand Electromagnetic Ecology,Saint-Petersburg:2007:265-268.
TRICHTCHENKO L,BOTELER D H.Response of Power Systems to the Temporal Characteristics of Geomagnetic Storm[sC]//2006 Canadian Conference on Electricaland Computer Engineering,Ottawa:2006:390-393.
W RADASKY,J KAPPENMAN,J GILBERT.An Overview of the Development and Validation of Large Power Grid Models for Geomagnetic Storms[C]//4th Asia-Pacific Conference on Environmental Electromagnetics,Dalian:2006:25-28.
哈辉,邱鹏程,辛长江,等.格尔木地磁台观测环境测试与分析[J].地震地磁观测与研究,2003,24(5):76-81.
齐磊,崔翔,吴燕.交流输电线路对地震观测台站的最小距离研究[J].高电压技术,2010,36(3):649-656.
沈红会,周加新,张秀霞,等.直流输电对江苏地磁观测的影响分析[J].地震地磁观测与研究,2005,26(5):65-70.
沈红会,张秀霞,冯志生,等.减小直流输电对地磁观测影响的几种方法[J].中国地震,2005,21(4):530-535.
郝长安,赵伦,倪友忠,等.葛洲坝-南桥直流输电线路对地磁台的影响[J].地震地磁观测与研究,2008,29(5):9-15.
胡聿贤.地震工程学[M].北京:地震出版社,2006.
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