绝缘局部放电检测的自适应数字滤波技术

Adaptive Digital Filtering Technique of PD Measurement of Insulation

在绝缘局部放电（ＰＤ）检测中，抑制干扰历来是一个非常重要的问题。为抑制干扰，提高信噪比，提出了采样数据的自适应滤波方法，将其运用于模拟和实际采样信号分析时，成功地在强噪声干扰环境下分辨出了弱的局部放电信号。

It is a very important problem to restrain noise during PD measurement of insulation.In order to restrain noise and improve signal noise ratio,an adaptive digital filtering technique is proposed in this paper.Small PD signals are successfully detected under strong noise condition,when this technique is used to analyse imitative and practical sampling signals.