中文摘要：

为了提高检测系统识别局部放电信号和干扰信号的能力，笔者根据局部放电脉冲信号的超宽带特性，提出使用梅林变换对其进行处理，得到该脉冲信号的特殊“频域”波形。针对实际信号的离散特性，给出了基于快速傅立叶变换（FFT）而实现信号快速梅林变换（FMT）的方法。实例分析结果表明：该变换算法简单、运算速度快，可以应用于宽带信号的在线实时处理。这为局部放电脉冲信号“频域”变换以及“频域”波形特征参数提取提供了一种新的方法。

英文摘要：

For improving the ability of detection systems to identify partial discharge signal and interference signal, the Mellin transform was applied in PD signal process to obtain the special pulse shape in frequency-domain according to the wide-band characteristic of PD pulse signal. A method of calculating the fast Mellin transform was presented based on the fast Fourier transform （FFT） for the real signal in discrete time-domain. The results show that the FMT algorithm is simple with a fast operational speed for on-line real-time signal processing, which provides a new method to make the frequency-domain transform and feature extraction for PD pulse signals.