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地磁秒数据观测供电干扰分析-以昌黎台为例
佟鑫1, 周剑青1, 郭建芳1, 张国苓2, 刘哲1
1.河北省地震局秦皇岛中心台;2.河北省地震局
摘要:
摘要:本文针对地磁秒数据观测中遇到的两类供电干扰进行了分析,一类为直流输电(或供电)影响,另一类为电气化铁路放电影响。作者以昌黎地磁台FGM磁通门磁力仪为研究对象,进行了干扰特征分析和电气化铁路干扰的加密观测实验。结果表明:直流输电(或供电)干扰与干扰源电流体系变化密切相关,历次变化特征不尽相同,但基本以阶变为主。通过加密观测实验发现,电气化铁路由于运行期间弓网系统接触或其它原因导致的放电现象,是导致昌黎台地磁秒数据出现随机小幅干扰的因素,该实验也佐证了往年该类现象的存在并对以往的错误判断提供依据。
关键词:  关键词:地磁  电气化铁路  干扰
DOI:
分类号:
基金项目:中国地震局三结合课题;河北省地震局面上项目
Analysis Power Interference Of Geomagnetic Second Data--A Case Study in Changli Seismostation
tongxin1, Zhou Jianqing1, Guo Jianfang1, Zhang Guoling2, Liu Zhe1
1.Earthquake Administration of Hebei Province Qinhuangdao Centeral Seismic Station;2.Earthquake Administration of Hebei Province
Abstract:
Abstract:The article analysis two power supply interferences in the observation of the geomagnetic second data.The two power supply interferences are the HVDC interference and the discharge interference of electrified railway.By taking FGM Fluxgate Magnetometer in Changli Seismostation as the research object.We analysis the interference characteristics of the Fluxgate Magnetometer and intensive observational for electrified railway.The result shows that HVDC interference and the electric system of interference source are closely related. The variation characteristics are different.The mainly changes are order variable.We found the discharge phenomenon in the operation period of electrified railway by intensive observational.Think that the phenomenon is the random small amplitude interference factor of the second data in Changli Seismostation.This experiment also shows that the phenomenon is exist and provide evidence for wrong judgment.
Key words:  Key Words:Geomagnetic  Electrified railway  Interference