欢迎访问《地震》,

地震 ›› 2023, Vol. 43 ›› Issue (2): 156-165.doi: 10.12196/j.issn.1000-3274.2023.02.013

• • 上一篇    下一篇

高压直流输电对山西南部地电场观测影响分析

王鹏伟1,2, 胡玉良1,2, 宁亚灵1,2, 郭文峰1,2, 李晓锐2,3   

  1. 1.山西省地震局, 山西 太原 030021;
    2.太原大陆裂谷动力学国家野外科学观测研究站, 山西 太原 030025;
    3.山西省地震局运城地震监测中心站, 山西 夏县 044400
  • 收稿日期:2023-01-03 修回日期:2023-04-03 发布日期:2023-07-05
  • 通讯作者: 胡玉良(1982-), 高级工程师。 E-mail: huyuliang130@163.com
  • 作者简介:王鹏伟(1986-), 男, 山西长治人, 工程师, 主要从事地震监测与分析研究。
  • 基金资助:
    山西省地震局2022年科研项目(SBK-2206); 中国地震局地震科技星火计划项目(XH21008Y)

Effect of HVDC Transmission on Geoelectric Field Observation in the Southern of Shanxi Province

WANG Peng-wei1,2, HU Yu-liang1,2, NING Ya-ling1,2, GUO Weng-feng1,2, LI Xiao-rui2,3   

  1. 1. Earthquake Shanxi Agency, Taiyuan 030021, China;
    2. Continental Rift Valley Dynamics State Observatory of Taiyuan, Taiyuan 030025, China;
    3. Yuncheng Earthquake Monitoring Center Station, Shanxi Earthquake Agency, Xiaoxian 044400, China
  • Received:2023-01-03 Revised:2023-04-03 Published:2023-07-05

摘要: 为研究山西南部临汾、 夏县地电场受高压直流输电的影响, 分析地电场观测受干扰的变化形态与特征, 结合高压直流输电干扰的机理, 定量计算分析不同换流站接地极对同一台站的影响, 以及同一换流站接地极对不同台站的影响。 研究表明: ① 当地电场观测数据受高压直流输电线路干扰时, 地电场会出现畸变, 较典型形态为方波与两端尖峰叠加方波形态, 不同的高压线路, 各台站观测到的附加电场信号变化特征有很大的不同; ② 当高压直流输电线路运行故障而产生大地回路电流时, 它对地电场观测数据可能会产生一定的影响, 受同一高压直流输电影响的同一台站同一方向上长、 短极距观测数据方向一致, 干扰幅度基本一致; ③ 当高压直流输电线路运行故障而产生大地回路电流时, 不同台站所受干扰随着接地极与台站的距离平方成反比关系, 同时还受到台站电导率的影响。

关键词: 地电场观测, 高压直流输电, 干扰分析

Abstract: In order to study the influence of HVDC transmission on the geoelectric field in Linfen and Xiaxian seismic station of southern Shanxi Province, the variation patterns and characteristics of the interference on the geoelectric field observation are analyzed. Combined with the mechanism of HVDC transmission interference, the influence of different ground electrode on the same station and the influence of the same ground electrode region on different stations are quantitatively calculated and analyzed. The results show that: ① When the local electric field observation data are disturbed by HVDC transmission lines, the geoelectric field will be distorted, and the typical forms are square wave and square wave with sharp peak. The variation characteristics of the additional electric field signals observed by different stations are very different for different HVDC transmission lines. ② The earth loop current caused by the HVDC transmission line may have certain influence on the observation data of geoelectric field. The observation data of long and short pole distance in the same direction at the same station affected by the same HVDC transmission line have the same direction and the interference amplitude is basically the same. ③ When the HVDC transmission line fault causes the earth loop current, the interference of different stations is inversely proportional to the square of the distance between the ground electrode and the station, and is also affected by the conductivity of the station.

Key words: Geoelectric field observation, HVDC transmission, Interference analysis

中图分类号: