Research of power system fault data compression
Miaoping Sun · Dianli zidonghua shebei · 2004
For power system mass data transmission, a practical method of data compression is put forward. Datas are converted from time-domain to frequency-domain by using discrete wavelet transformation. The high-frequency coefficients are quantified according to relevant thresholds and the low - frequency coefficients are changed into integer data by multiplication. Static Huffman coding is carried out with the wavelet level,the multiplication factor,the number, values and positions of high -frequency coefficients,the number of primary data,and the end identifiers. Simulative analysis shows that both data compression ratio and reconstruction error are very small and the method is valid.