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  李飞,孙君嵩,卜玉菲.高压直流输电对新沂台地电场的影响及机理分析[J].震灾防御技术,2020,15(3):624-634, DOI:10.11899/zzfy20200317.

高压直流输电对新沂台地电场的影响及机理分析
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。
作者单位
李飞 江苏省地震局新沂地震台, 江苏新沂 221400 
孙君嵩 江苏省地震局, 南京 210014 
卜玉菲 江苏省地震局, 南京 210014 
关  键  词:地电场  高压直流输电(HVDC)  入地电流  机理  影响量
DOI:10.11899/zzfy20200317
基金项目: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)
收稿日期:2019-04-04
作者简介:李飞,男,生于1970年。高级工程师。主要从事监测预报工作。E-mail:1075624821@qq.com
通讯作者:
Sutdy on the Impact and Formation Mechanism of HVDC on Geoelectric Field at Xinyi Station
Abstract:      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.
Keywords:  Geoelectric field  HVDC  Earth-fault current  Anomaly  Mechanism
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