【摘要】 在简要介绍小波理论的基础上,将小波变换应用于电力系统故障时刻的提取,并给出了220kV系统单相接地故障的MATLAB仿真实例,同时根据有效信号和随机噪声的小波变换呈现出不同的特征,探讨了小波分析用于微机继电保护时,尺度参数对小波变换的影响。更多还原

【Abstract】 On the basis of introducing the wavelet theory, wavelet transform is applied in the extraction at fault time in power system, and an example of one phase grounded based on MATLAB is introduced in 220 kV system. At the same time, this paper discusses the scale parameter influence on wavelet transform in terms of the different characteristic of availability signal and random signal under the wavelet transform, with wavelet transform used in computer protection.更多还原