高压直流输电对新沂台地电场的影响及机理分析  

Sutdy on the Impact and Formation Mechanism of HVDC on Geoelectric Field at Xinyi Station

作　　者：李飞[1] 孙君嵩 卜玉菲[2] Li Fei;Sun Junsong;Bu Yufei(Xinyi Seismic Station of Jiangsu Province,Xinyi 221400,Jiangsu,China;Earthquake Administration of Jiangsu Province,Nanjing 210014,China)

机构地区：[1]江苏省地震局新沂地震台,江苏新沂221400 [2]江苏省地震局,南京210014

出　　处：《震灾防御技术》2020年第3期624-634,共11页Technology for Earthquake Disaster Prevention

基　　金：国家自然基金(41374080);中国地震局监测、预报、科研三结合课题(3JH-202002008)。

摘　　要：通过8条高压直流输电(HVDC)线路对新沂台地电场影响特征进行分析,分析结果表明,在影响时段,3个测向变化形态、幅度均不相同,长短极距之间差异性较小。综合运用影响量、幅值比、相互间的形态关系可判别具体线路。影响机理初步研究结果显示,HVDC对地电场的影响与入地电流、线路和接地极到台站的空间距离、各测向夹角及地下介质差异性等有关。Through sutdying on the impact of 8 HVDC power line on geoelectric field at Xinyi station,results show that the variation form and magnitudes of three items are differentand there is little difference between long and short pole distances.It can be used to identify specific lines through using influence quantity,amplitude ratio and forms relationship between each other.Though preliminary investigation on the mechanisms,it is showed that the impact of HVDC on geoelectric field is associated with the size of earth-fault current,the space dstance between of thelines and grounding electrode to station,spatial distance between lines and ground pole to station and the magnitude of the angle between each items,differences of underground media and other aspects.

关 键 词：地电场 高压直流输电(HVDC) 入地电流 机理 影响量 

分 类 号：P315.722[天文地球—地震学]