[1]高云峰,贾昕晔,贾彦杰,等.高压直流输电对宝昌地震台地电场观测干扰分析[J].华南地震,2023,(02):69-76.[doi:10.13512/j.hndz.2023.02.07]
 GAO Yunfeng,JIA Xinye,JIA Yanjie,et al.Interference Analysis of HVDC Transmission on Geoelectric Field Observation at Baochang Station[J].,2023,(02):69-76.[doi:10.13512/j.hndz.2023.02.07]
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高压直流输电对宝昌地震台地电场观测干扰分析()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2023年02期
页码:
69-76
栏目:
地震科学研究
出版日期:
2023-06-20

文章信息/Info

Title:
Interference Analysis of HVDC Transmission on Geoelectric Field Observation at Baochang Station
文章编号:
1001-8662(2023)02-0069-08
作者:
高云峰贾昕晔贾彦杰白少奇
内蒙古自治区地震局锡林浩特地震监测中心站,内蒙古 太仆寺旗 027000
Author(s):
GAO YunfengJIA XinyeJIA YanjieBAI Shaoqi
Xilinhot Central Station , Earthquake Agency of Inner Mongolia Autonomous Region , Taipusi 027000, China
关键词:
地电场高压直流干扰岩体裂隙优势方位角
Keywords:
Geoelectric fieldHVDC interferenceDominant azimuth of rock fracture
分类号:
TM721.1;P315.7
DOI:
10.13512/j.hndz.2023.02.07
文献标志码:
A
摘要:
分析了宝昌地震台地电场受高压直流干扰的变化特征及原因,对干扰的程度及方式进行了探讨,并计算了高压直流输电干扰时台址岩体裂隙优势方位。结果表明:宝昌台高压直流干扰线路主要为锡泰线;地电场受高压直流干扰期间变化形态出现大幅度跃变只在高压输电入地电流开始注入和停止注入时产生;地电场3测向受高压直流干扰影响幅度最大测项为NE测向,最小为测项为NS测向,同一测向长、短极距之间的影响量虽然存在差异,但幅值比基本相同,每次干扰长短极距各分量变化幅度不尽相同,但各分量产生方波的方向相同;宝昌台岩体裂隙优势方位α角为50°±10°;高压直流输电干扰发生时,岩体裂隙优势方位α角在正常背景值范围内,并未超出背景值,因此宝昌台地电场台址岩体裂隙优势方位角计算结果对区别高压直流输电干扰有效。
Abstract:
This paper analyzes the variation characteristics and causes of the geoelectric field of Baochang Seismic Station influenced by HVDC, discusses the degree and mode of interference, and calculates the dominant orientation of rock fracture at the site during HVDC interference.The results show that the HVDC interference line of Baochang Station is mainly Xitai line; the large jump of the change pattern of the geoelectric field during the HVDC interference occurs only when the high-voltage transmission ground current starts to inject and stops to inject. The geoelectric field 3 direction finding is affected by HVDC interference, and the maximum measurement term is NE direction finding, and the minimum measurement term is NS direction finding. Although there are differences in the influence between the long and short polar distances of the same direction, the amplitude ratio is basically the same. The amplitude of each component of the long and short polar distances of each interference is different, but the direction of the square wave generated by each component is the same. The dominant azimuth α angle of rock fracture at Baochang Station is 50°± 10°, and the α angle is within the normal background value range and does not exceed the background value, when HVDC transmission interference occurs. Therefore, the calculation results of the dominant azimuth of the rock fractures of geoelectric field site at Baochang Station are effective in distinguishing the interference of HVDC transmission.

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备注/Memo

备注/Memo:
收稿日期:2022-04-12基金项目:内蒙古地震局局长基金课题(2020YB13)作者简介:高云峰(1993-),男,硕士,主要从事地震监测工作。E-mail:308647910@qq.com
更新日期/Last Update: 2023-06-15