Second generation wavelet - based data compression algorithm for power system fault recorder

Along with the elevation of fault process monitoring level ,the fault recording signals in-crease rapidly bringing troubles to data transmission and storage.A new method of lossless data compression based on integer wavelet transform is proposed.The wavelet theory and the second-generation wavelet algorithm are introduced.The proposed method can compress data without loss through reversible integer wavelet decomposition on multi-scale ,and encode the wavelet coefficient for each scale with Huffman Coding.Results of a simulative experiment indicate that this method has a higher compression radio.