软阈值消噪法在电缆故障测距中的应用

The Application of Soft-threshold De-noising in Cable Fault Location

依据不同信号的小波变换系数模极大值的传播特性,针对电缆故障测距中信号样本的特点,提出了一种改进的软阈值消噪法。实验结果表明,该方法能有效地恢复脉冲行波的原貌,为电缆故障精确定位创造了条件。

Based on the propagation property of module maximum of wavelet transform coefficients under differ- ent signals and the characteristics of signal sample in cable fault location,an improved means of soft-threshold de- noising is put forward. The test results indicate that the means can restore the pulse traveling wave signal effi- ciently,thus provide the advantage for accurate cable location.