传感技术学报2024，Vol.37Issue(6)：980-984,5.DOI:10.3969/j.issn.1004-1699.2024.06.007
强干扰下的SVG微弱谐波信号传感检测方法
Detection Method of SVG Weak Harmonic Signal under Strong Interference
摘要
Abstract
When the weak harmonic signal of static var generator(SVG)is in the central frequency band of strong interference area,the effectiveness of harmonic signal detection will be affected.In order to improve the detection performance of harmonic signal,a method of SVG weak harmonic signal sensing detection under strong interference is proposed.The SVG signal is extracted under strong interfer-ence,and the modified projection blocking method is used to eliminate the interference in the SVG signal.The vibration sensor is select-ed as the SVG weak harmonic signal detection instrument.Since the instrument amplifier in the vibration sensor will superimpose more high-frequency noise on the amplified SVG signal,the noise is further filtered on the basis of strong interference suppression.The vibra-tion sensor is placed on the vibration table and the processed SVG signal is detected.The digital oscilloscope is used to observe the out-put waveform of SVG weak harmonic signal in the amplification circuit and judge whether the signal is distorted during transmission,so as to realize the sensing detection of SVG weak harmonic signal.The experimental results show that the SNR of the proposed method is higher than 23.51 dB,the amplitude detection error is lower than 0.63 Hz,and the frequency detection error is lower than 7.1 Hz.关键词
振动传感器/静止无功发生器/信号检测/强干扰/谐波信号/信号去噪Key words
vibration sensor/static reactive power generator/signal detection/strong interference/harmonic signal/signal denoising分类
信息技术与安全科学引用本文复制引用
张宇华,要翔..强干扰下的SVG微弱谐波信号传感检测方法[J].传感技术学报,2024,37(6):980-984,5.基金项目
上海绿色能源并网工程技术研究中心(13DZ2251900) （13DZ2251900）
上海市科技创新行动计划项目(19DZ2204700) （19DZ2204700）
