基于小波变换的电力计量系统故障信息提取研究
|
摘要
根据高压电力计量系统故障信息情况,提出了一种基于小波变换技术对故障信号进行分析的方法.通过外加激励信号对高压电力计量系统故障进行检测,利用截频性能出色的dmey小波对故障信号进行4级小波分解,根据小波分解后的信号频带对应关系,保留检测信号所在频带的波形数据进行重构并分析研究.试验结果表明该方法能够有效地消除杂波干扰,准确地提取出相关故障的信息.
According to the fault diagnosis's need of short circuit of the primary side of high voltage electric power metering system's CT,we put forward a fault signal analysis method that based on the wavelet transform technology.First of all,we use the method of additional excitation signal to detect faults.Second,using dmey wavelet whose cut frequency performance is good to decompose the fault signal at 4-level wavelet decomposition,according to signal's frequency band corresponding relation of the wavelet decomposition,keeping the testing signals' data of the frequency band of wave for reconstruction and analysis research.The test results show that this method can effectively eliminate clutter interference and accurately judge the failures.
According to the fault diagnosis's need of short circuit of the primary side of high voltage electric power metering system's CT,we put forward a fault signal analysis method that based on the wavelet transform technology.First of all,we use the method of additional excitation signal to detect faults.Second,using dmey wavelet whose cut frequency performance is good to decompose the fault signal at 4-level wavelet decomposition,according to signal's frequency band corresponding relation of the wavelet decomposition,keeping the testing signals' data of the frequency band of wave for reconstruction and analysis research.The test results show that this method can effectively eliminate clutter interference and accurately judge the failures.
引文
[1]赵建军,张素君.高压电力计量系统故障分析与建模[J].电测与仪表,2007,44(4):5-8.
[2]赵林海,王永和.一种基于正交小波包技术的机车信号记录器数据快速压缩方法[J].铁道学报,31(6):102-106.
[3]黄荣雄,吴杰康,韦善革.基于小波变换的电力系统谐波频率测量算法[J].电力学报,2010,25(3):192-196.
[4]许珉,程兴民.基于单子带重构改进小波变换的电力系统谐波检测方法[J].电力自动化设备,2008,28(9):10-14.
[5]Stephane Mallat,Wen Liang Hwang.Singularity detection and processing with wavelets[J].IEEE Transactions onInformation Theory,1992,38(2):617-625.
[6]郑治真.小波变换及其MATLAB工具的应用[M].北京:地震出版社,2001.
[7]林湘宁,刘沛,程时杰.基于小波变换的大型电力变压器故障诊断技术[C]∥第一届全国诊断工程技术学术会议,武汉:华中理工大学科学技术委员会,1998.
[2]赵林海,王永和.一种基于正交小波包技术的机车信号记录器数据快速压缩方法[J].铁道学报,31(6):102-106.
[3]黄荣雄,吴杰康,韦善革.基于小波变换的电力系统谐波频率测量算法[J].电力学报,2010,25(3):192-196.
[4]许珉,程兴民.基于单子带重构改进小波变换的电力系统谐波检测方法[J].电力自动化设备,2008,28(9):10-14.
[5]Stephane Mallat,Wen Liang Hwang.Singularity detection and processing with wavelets[J].IEEE Transactions onInformation Theory,1992,38(2):617-625.
[6]郑治真.小波变换及其MATLAB工具的应用[M].北京:地震出版社,2001.
[7]林湘宁,刘沛,程时杰.基于小波变换的大型电力变压器故障诊断技术[C]∥第一届全国诊断工程技术学术会议,武汉:华中理工大学科学技术委员会,1998.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心