高压直流输电对新疆区域地电场观测的影响分析

EFFECT OF HVDC TRANSMISSION ON GEOELECTRIC FIELD OBSERVATION IN XINJIANG

基于高压直流输电对地电场的干扰原理,结合新疆区域多台地电场观测资料,定量根据不同距离、变化形态、变化幅度、变化方向等特征进行干扰分析。研究乌鲁木齐台、红浅观测点和温泉老台地电场观测资料受到昌宣线高压直流输电干扰的异常变化形态和特征,为新疆区域地电场正确识别高压直流输电干扰提供参考。同时实验采用最小二乘拟合法对地电场受扰数据进行干扰抑制,结果显示,处理后的干扰数据保留了原有信号的数据信息和变化趋势形态,数据曲线清晰,地电场信号有了较为明显的改善。

Based on the interference principle of HVDC transmission to geoelectric field,combined with the observation data of multiple geoelectric fields in Xinjiang,the interference analysis is carried out quantitatively according to the characteristics of different distance,change form,change amplitude and change direction.This paper studies anomaly patterns and characteristics of the ground electric field observation data of Urumqi station,Hongqian observation point and Wenquan old station disturbed by HVDC transmission of Changji-Xuancheng line,so as to provide a reference for the correct identification of HVDC transmission interference by the regional ground electric field in Xinjiang.At the same time,the least square fitting method is used to suppress the interference of the disturbed data of the geoelectric field.The results show that the processed interference data retains the data information and change trend of the original signal,the data curve is clear,and the geoelectric field signal has been significantly improved.