【摘要】 从应用的角度简述了小波变换的基本理论和算法 ,给出了输电线路典型短路电流的不同频率分量的分离实例。分析结果表明 ,此方法能快速有效地从短路电流中分离出基频分量和衰减直流分量 ,为断路器智能操作和其他继电保护算法提供了一种新的信号分析手段更多还原

【Abstract】 In this paper,the basic theory and algorithm of wavelet transform is briefly introduced and the example of wavelet decomposition of typical short circuit current components in HV transmissions line is presented.The analysis results show that this method can decompose out fundamental component and decaying DC component validly.The method provides a new means of signal analysis for intelligent operation of circuit breaker and other protective relay devices.更多还原