电子科技 ›› 2021, Vol. 34 ›› Issue (3): 65-70.doi: 10.16180/j.cnki.issn1007-7820.2021.03.012

• • 上一篇    

基于快速傅里叶变换的VFTO实测波形分析

陈玮任1,张文斌1,王立哲2,李银城2,乔禹宁1   

  1. 1.昆明理工大学 机电工程学院,云南 昆明 650000
    2.昆明理工大学 理学院,云南 昆明 650000
  • 收稿日期:2019-12-02 出版日期:2021-03-15 发布日期:2021-03-10
  • 作者简介:陈玮任(1995-),男,硕士研究生。研究方向:局部放电、电力设备状态监测与诊断。|张文斌(1976-),男,博士,副教授。研究方向:高压绝缘放电与劣化特性、电力设备状态监测与诊断、测控技术与仪器及智能传感器。|王立哲(1993-),男,硕士研究生。研究方向:气体绝缘变电站快速暂态过电压、电力设备状态检测与诊断、智能传感器。
  • 基金资助:
    中国南方电网公司科技项目(KTKM2018203)

Analysis of VFTO Field Measured Waveform Based on Fast Fourier Transform

CHEN Weiren1,ZHANG Wenbin1,WANG Lizhe2,LI Yincheng2,QIAO Yuning1   

  1. 1. Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650000,China
    2. School of Science,Kunming University of Science and Technology,Kunming 650000,China
  • Received:2019-12-02 Online:2021-03-15 Published:2021-03-10
  • Supported by:
    China Southern Power Grid Companny Science and Technology Project(KTKM2018203)

摘要:

当GIS内部产生的VFTO频率与绕组类设备的谐振频率达到一致时,会在设备中产生谐振过电压威胁设备的安全运行,故对VFTO信号进行频谱特征分析是十分必要的。文中提出利用快速傅里叶变换对现场实测的隔离开关闭合时产生的VFTO波形数据进行频谱分析。对快速傅里叶变换的原理及对VFTO进行频谱分析的可行性进行了介绍,并对测量系统和实验环境进行了说明。从结果分析中可以发现,现场实测VFTO信号的频率分量与IEC 60071-1∶2006标准中提出的频率分量一致,验证了快速傅里叶变换对VFTO信号进行频谱分析的可行性,表明其在实际工程项目中有良好的适用性。

关键词: 气体绝缘开关设备, 特快速暂态过电压, 快速傅里叶变换, 现场实测, 测量系统, 频谱特征

Abstract:

When the frequency of the VFTO generated inside the GIS is consistent with the resonance frequency of the winding-type equipment, resonance overvoltage will be generated in the equipment and threaten the safe operation of the equipment. Therefore, it is necessary to analyze the spectral characteristics of the VFTO signal. In this study, a fast Fourier transform is proposed to perform spectrum analysis on VFTO waveform data generated when a field-disconnected isolator is closed. This study first introduces the principle of fast Fourier transform and the feasibility of VFTO spectrum analysis in detail, and describes the measurement system and experimental environment. From the result analysis, it can be found that the frequency component of the field measured VFTO signal is consistent with the frequency component proposed in the IEC 60071-1∶2006 standard. The results verifies the feasibility of performing fast Fourier transform on the spectrum analysis of VFTO signals, and indicates the great applicability in practical engineering projects.

Key words: GIS, VFTO, fast Fourier transform, field measurement, measuring system, spectrum features

中图分类号: 

  • TN911.71