【摘要】 针对局部放电测量中存在的缓变窄带干扰，采用Ｍａｌａｔ塔式小波分解算法对局部放电信号和噪声信号的小波分解特性进行详细研究，并提出了一种基于ａｄｈｏｃ算法思想的算法，来提取局部放电脉冲的位置与幅值特征。实验证明，该算法能有效地提取局部放电信号的特征，可用于绝缘局部放电在线监测。更多还原

【Abstract】 In this paper, Mallat wavelet algorithm is adopted to study the charateristics of PD impluses and noises. An algorithm based on ad hoc algorithm is developed to extract PD signals from the narrow band disturbance. The experiemental results show the efficiency of this method and prove that it can be used in on line monitoring of partial discharges.更多还原