Studies on testing on line of power supply equipment part discharge on the basis of the wavelet theory

Abstract：The part discharge measure is one important means that power equipment ensure trustiness running.The local measure discharge is faced with strong interfere.At present, the data processing is mainly based on fourier transform arithmetic.It is very difficult to obtain an ideal result for no calm wave signal of part discharge due to its localization.It has introduced one testing instrument of power supply equipment based on wavelet analysis, the application of Mallat tower decompose arithmetic based on much distinguish analysis. It has adopted sampling frequency select 20MHz.Thus, discharge signal can obtain from narrow strip interfere.The inside and outside distinguish problem of discharge pulse with the time_frequency analysis tool has been solved by one frequency steip phase rule of discharge shape inside, outside and in HVTC′s connection gad line.

Keyword：wavelet transform;part discharge;on line measure equipment;Mallat pass arithmetic;