【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.更多还原

【Abstract】 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.更多还原