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Mathematical Problems in Engineering
Volume 2014, Article ID 905108, 6 pages
http://dx.doi.org/10.1155/2014/905108
Research Article

Active Power Measurement Based on Multiwavelet Transforms

School of Measurement and Communication, Harbin University of Science and Technology, Harbin 150080, China

Received 29 June 2013; Revised 31 December 2013; Accepted 2 January 2014; Published 11 February 2014

Academic Editor: Claudio R. Fuerte-Esquivel

Copyright © 2014 Xiao-Bing Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper discusses a new method for calculating active power in the multiwavelet domain. When the voltage and current waveforms are analyzed using multiwavelet, the active power can be calculated by simply adding the products of the multiwavelet coefficients without having to reconstruct the signals back to the time domain first and then using the traditional integration. From the simulation result, we can see that the results using multiwavelet are better than the ones using wavelet and Fourier Transforms no matter which prefilter is used.