LIFTING BASED COMPRESSION ALGORITHM FOR POWER SYSTEM SIGNALS
Journal Title: Metrology and Measurement Systems - Year 2008, Vol 15, Issue 1
Abstract
The paper concerns the problem of power system signals compression with possible application in system monitoring and control. The proposed compression algorithm for power system signals ensures efficient use of available storage memory or communication channel bandwidth. It is shown that while preserving good quality, compression ratios from 20 in case of highly distorted waveforms to 340 for slightly distorted sinusoidal waves can be achieved. The presented results were evaluated with a specially prepared representative database of field-recorded electric signals. For signal decorrelation lifting implementation of wavelet transform in the compression algorithm was used. The influence of sampling frequency, length of data frame, type of wavelet function, number of wavelet decomposition stages and quantization level on the compression ratio and compression quality was investigated.
Authors and Affiliations
KRZYSZTOF DUDA
Keywords
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