宝德线高压直流输电附加电场变化特征  

Variation Characteristics of Additional Electric Field of Baode HVDC Transmission Line

作　　者：罗词建[1] LUO Cijian(Shaanxi Earthquake Agency,Xi’an 710068,China)

机构地区：[1]陕西省地震局,西安710068

出　　处：《华北地震科学》2021年第4期95-103,共9页North China Earthquake Sciences

基　　金：中国地震局三结合课题(3JH-202001089);陕西省地震局2019年度启航与创新基金课题(QC201902)。

摘　　要：宝鸡—德阳±500 kV高压直流输电工程途经陕甘川3省,布设在陕、甘、宁、川、晋、渝等6个省(市、区)的多个地电场观测台站均能记录到其产生的附加电场信号。对线路两侧及两端不同区域的地电场观测数据变化特征进行研究发现,附加电场在变化方向、变化幅度、变化形态以及空间分布上显示出一定特征。针对上述变化特征,从高压直流输电对地电场观测的影响机理和地电场台站地质条件等方面进行了一些有益的探讨,以期加深对地震电信号变化特征的认识。The Baode HVDC transmission project passes through three provinces of Shaanxi,Gansu and Sichuan,and the additional electric field signals generated can be recorded by multiple geoelectric field observation stations located in six provinces(cities and districts)including Shaanxi,Gansu,Ningxia,Sichuan,Shanxi and Chongqing.In this paper,the variation characteristics of geoelectric field observation data in different areas on both sides and both ends of the line are studied,and it is found that the additional electric field shows certain characteristics in the variation direction,amplitude,morphology and spatial distribution.Aiming at the above change characteristics,this paper discusses the influence mechanism of HVDC transmission on the observation of geoelectric field and the geological conditions of geoelectric field station,in order to deepen the understanding of the change characteristics of seismic electric signal.

关 键 词：地电场 高压直流输电 干扰 

分 类 号：P315.7[天文地球—地震学]