高压直流输电对湖北省地磁观测的影响  

Influence of HVDC transmission on geomagnetic observation inHubei Province

作　　者：张建涛 王明贵 陈星星 周超 ZHANG Jiantao;WANG Minggui;CHEN Xingxing;ZHOU Chao(Hubei Earthquake Agency,Wuhan 430071,China)

机构地区：[1]湖北省地震局,武汉430071

出　　处：《地震地磁观测与研究》2023年第3期95-101,共7页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局地震研究所基本科研业务费专项资助项目;中国地震局地壳应力研究所基本科研业务费专项资助项目(项目批准号:IS306337);湖北省地震局基础科研基金(项目编号:2022HBJJ020)。

摘　　要：本文研究2017—2022年湖北省地磁观测受高压直流输电干扰的情况,发现目前有14条线路造成干扰,干扰集中在新线路投运初期,年均受干扰天数约105天。此外,探讨了高压直流输电线路的发展特点和湖北地磁台站布局的合理性,归纳了缓变的4种基本形态,明确了各种干扰形式的处理思路和步骤,发现同一线路对不同台站的干扰幅度,以及对同一台站地磁Z、F分量干扰幅度均线性相关。研究结论有助于提高地磁高压直流干扰数据处理的精度和效率,为进一步开发自动化处理算法积累了理论基础。This paper studies the interference of HVDC transmission on geomagnetic stations in Hubei Province from 2017 to 2022.It is found that 14 lines have affected the geomagnetic observation,and the interference is concentrated in the initial operation stage of the new lines,with an average annual interference of about 105 days.Additionally,the development characteristics of HVDC transmission lines and the rationality of the layout of geomagnetic stations are discussed,four basic patterns of slow change are summarized,and processing ideas and steps for various forms of interference are clarified.It is found that the interference amplitude of the same line at different geomagnetic stations and the interference amplitude of geomagnetic Z and F components at the same station are linearly correlated.The research conclusion helps to improve the precision and efficiency of geomagnetic data processing under HVDC interference and accumulates a theoretical basis for further development of automatic processing algorithms.

关 键 词：地磁观测 高压直流输电干扰 地磁台站 

分 类 号：P315.721[天文地球—地震学]