电场传感器电磁瞬态脉冲干扰信号自动化抑制方法  

Automated suppression method for electromagnetic transient pulse interference signals in electric field sensors

作　　者：陈志刚[1] 高冰 CHEN Zhigang;GAO Bing(School of Science,Heilongjiang Institute of Technology,Harbin 150000,China;State Grid Harbin Electric Power Supply Company,Harbin 150028,China)

机构地区：[1]黑龙江工程学院理学院,哈尔滨150050 [2]国网哈尔滨供电公司,哈尔滨150028

出　　处：《自动化与仪器仪表》2025年第1期98-102,共5页Automation & Instrumentation

摘　　要：为可靠完成电场传感器电磁瞬态脉冲干扰信号自动化抑制,保证电场传感器的测量精度,提出基于自适应时变滤波器的电场传感器电磁瞬态脉冲信号抑制方法。该方法依据电场传感器电磁瞬态脉冲干扰信号特性,获取电场传感器电磁瞬态脉冲流信号,采用自适应广义S变换算法处理该信号后生成信号的时频图,将时频图输入自适应时变滤波器,实行灰度变换和阈值分割处理后,经过傅里叶变换生成二维分布图,将其与滤波后的输出函数相乘,分离有效信号和干扰信号,抑制通域外的脉冲信号干扰。测试结果显示:该方法的变换效果较好,能够清晰呈现瞬态脉冲干扰信号的分布情况以及幅值大小;干扰信号抑制后,有效信号的波形相似系数均在0.942以上,并且有效信号没有发生缺失或者损坏现象。Reliable automatic suppression of electromagnetic transient pulse interference signals in electric field sensors can ensure the measurement accuracy of electric field sensors.Therefore,a method for suppressing electromagnetic transient pulse signals in electric field sensors based on adaptive time-varying filters is proposed.This method obtains the electromagnetic transient pulse flow signal of the electric field sensor based on the characteristics of the electromagnetic transient pulse interference signal of the electric field sensor.The adaptive generalized S-transform algorithm is used to process the signal and generate a time-frequency map.The time-frequency map is input into the adaptive time-varying filter,and after grayscale transformation and threshold segmentation processing,a two-dimensional distribution map is generated through Fourier transform.It is multiplied with the filtered output function to separate the effective signal and interference signal,and suppress pulse signal interference outside the passband.The test results show that the transformation effect of this method is good,and it can clearly present the distribution and amplitude of transient pulse interference signals;After suppressing interference signals,the waveform similarity of effective signals is above 0.942;And there is no missing or damaged effective signal.

关 键 词：电场传感器 电磁瞬态脉冲 干扰信号 自动化抑制 时频图 自适应时变滤波器 

分 类 号：TM721[电气工程—电力系统及自动化] TP202[自动化与计算机技术—检测技术与自动化装置]