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Partial Discharge Extraction Under PWM Pulse by sym4 Wavelet Digital Filter
Author(s): 
Pages: 35-38,50
Year: Issue:  2
Journal: TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY

Keyword:  局部放电数字滤波小波分析;
Abstract: 局部放电是导致变频电机绝缘过早破坏的主要原因之一.由于PWM脉冲电压频率高、上升沿陡,含有较多的谐波分量,使传感器耦合出来的信号包含了很多干扰,导致局部放电信号的分析比工频正弦条件下更加困难.本文提出了采用sym4小波分析法去除高频噪声,能有效地提取这种条件下的局部放电信号,为进一步分析绝缘破坏机理打下了良好的基础.
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