作　　者： ; ; ;

机构地区： 华南理工大学电力学院

出　　处： 《继电器》 2001年第5期1-4,共4页

摘　　要： 提出了基于幅频特性的复值小波函数构造方法及其相应的复值小波变换。该方法构造的复值小波具有频率局部化性能好、提取故障信号特征分量较准确的优点。复值小波变换能准确分辨出信号中所包含的幅值信息和相位信息 ,因而 ,适用于电力系统的故障信号的检测。利用基于幅频特性的复值小波变换 ,对发电机转子部分故障信号进行了分析 ,显示了基于幅频特性的复值小波变换的电力系统故障信号分析方法 ,是一种有效的方法。 In this paper,a method of the construction of complex functions and their transforms are presented.The complex wavelet functions constructed by means of this method have advantages of good performance in frequency localization and better veracity in extracting characteristic parts of signals.Because complex wavelet transforms can exactly identify amplitude and phase information in signal to be dealt with,they are suitable for detection of fault signals in power system.In this paper,some of failure signals in rotor of generator are analyzed by making use of complex wavelets based on amplitude frequency characteristic,it is shown that it is an effective method in fault signal analysis in power system.

关 键 词： 复值小波变换 电力系统 信号分析 幅频特性

领　　域： [电气工程]