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山东地磁台网受宁东高压直流输电干扰预处理质量分析
林秀娜1, 曲保安1, 贾立国1, 陈传华2, 范晓勇3,1, 邢伟伟1, 袁倩4, 池国民5
1.泰安基准地震台, 山东省泰安市罗汉崖路2号 271000;2.嘉祥地震监测中心台, 山东嘉祥 272400;3.中国地震局地球物理研究所, 北京 100081;4.青岛地震台, 山东青岛 266000;5.安丘地震台, 山东安丘 262100
摘要:
为进一步提高山东地磁台网受高压直流输电干扰的预处理质量,通过中国地震前兆数据处理系统中相对差值检测和预处理检测功能,对山东地磁台网多年来受宁东高压直流输电干扰预处理情况进行了总结分析。结果表明,经过数据预处理,宁东高压直流输电干扰基本被去除,但仍然存在高压直流输电干扰误判、起止时间错判、干扰幅度计量不精确等问题。针对上述问题,对数据进行复核和校对,应用“缓变台阶”功能重新处理,并加强对H、D分量干扰特征的研究。
关键词:  山东地磁台网  高压直流输电干扰  预处理质量
DOI:
分类号:P315
基金项目:中国地震局三结合课题(CEA-JC/3JH-161504)和山东省地震局合同制项目(16Y53)共同资助
Quality Analysis of the Preprocessing Data of the Shandong Geomagnetic Network during the Disturbance by the Ningdong High Voltage Direct Current Transmission
Lin Xiuna1, Jia Liguo1, Chen Chuanhua1, Fan Xiaoyong2, Wang Qiang3,1, Xing Weiwei1, Yuan Qian4, Chi Guomin5
1.Tai'an Fiducial Seismic Station, Shandong Earthquake Agency, Tai'an 271000, Shandong, China;2.Jiaxiang Central Seismic Station, Shandong Earthquake Agency, Jiaxiang 272400, Shandong, China;3.Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;4.Qingdao Seismic Station, Shandong Earthquake Agency, Qingdao 266000, Shandong, China;5.Anqiu Seismic Station, Shandong Earthquake Agency, Anqiu 262100, Shandong, China
Abstract:
To improve the preprocessing quality of the Shandong geomagnetic network data which were disturbed by High Voltage Direct Current(HVDC)transmission,we summarized and analyzed the preprocessing condition of the Shandong Geomagnetic Network during the disturbance by the Ningdong HVDC transmission over the years. The relative difference detection function and preprocessing function of National Earthquake Precursor Data Processing System is applied. The result shows that the Ningdong HVDC transmission disturbances are generally removed after the data preprocessing. Meanwhile,there are still some problems,such as misjudge of the HVDC transmission disturbance,misjudge of the beginning and ending time of the disturbance,inaccuracy preprocess of the disturbance magnitude,etc. Corresponding solutions are proposed to the specific problems,such as the double-check of the data,slowly varying step function to reprocess,and reinforced research to disturbance characteristic of H and D.
Key words:  Shandong geomagnetic network  High voltage direct current transmission disturbance  Preprocessing quality