Compression method of power quality data based on wavelet transform

The demand for data compression has increased considerably due to the huge amount of the power quality data detected. Aiming at the problem the current power quality data compression methods are short of considering the correlation of the three-phase power quality data, a novel approach of data compression for three-phase power quality based on wavelet transform is presented in the paper. The simulation results show that the proposed method can not only get high signal noise ratio relative to the existing methods of the power quality data compression under the same compression ratio, but also control the power quality compression performance according to the practical requirement flexibly.