论文部分内容阅读
提出了一种基于独立分量分析(ICA)的水轮发电机局部放电干扰抑制方法,该方法可以有效地分离出相互独立或者近似独立的源信号。对于现场采集到的局部放电信号,可认为该信号中局部放电脉冲信号和噪声干扰是相互独立的。通过ICA方法对检测到的局部放电信号进行信号分离和消噪处理,从而得到局部放电脉冲分量,在时域、频域上都保持了原信号的完整性。通过实例证明了该方法的有效性。
A method based on independent component analysis (ICA) is proposed to suppress the partial discharge of hydroelectric generators. This method can effectively separate source signals that are independent or nearly independent from each other. For the partial discharge signal collected on site, it can be considered that the partial discharge pulse signal and the noise interference in this signal are independent of each other. The signals of partial discharge detected by ICA are separated and de-noised by the method of ICA to obtain the pulse components of partial discharge, and maintain the integrity of the original signal in the time domain and the frequency domain. An example shows the effectiveness of this method.