【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。更多还原

【Abstract】 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.更多还原