DENOISING OF ELECTRIC POWER SYSTEM SIGNALS BASED ON DIFFERENT MULTIWAVELETS

Through the introduntion of multiwavelet basic theory, a simplified method about multiwavelet decomposition and reconstruction algorithm is proposed in this paper, which can decrease the computation during multiwavelet decomposition and reconstruction. Two types of pre-processing methods and their importance about multiwavelet are discussed. Denoising algorithm of multiwavelet is analyzed, and its applications on electric power system signals are proposed and done based on different multiwavelets with different pre-processing methods. The simulation results indicate that if proper pre-processing methods are chosen, the denoising performance of electric power system signals with multiwavelets is better than with traditional wavelets under same filters length.