Research and Design of Intelligent Wireless Electric Power Parameter Detection Algorithm Combining FFT with Wavelet Analysis

摘要

In modern society, power quality problem has become an important problem, which effects industrial production and product quality, etc. So, we need to monitor and analyze electric power parameter to assure electric power quality in prescribed limit. Aiming to disadvantages of present electric parameter detection of power harmonic, we design a kind of wireless power electric parameter detection system based on single chip microprocessor (SCM) technology, wireless communication technology, FFT, wavelet resolution analysis, and visual instrument (VI) technology, etc. System is composed of upper PC and lower PC. Lower PC uses transformer module, signal processor module to realize electric power signal conversion, which can be recognized by MSP430F149. Lower PC controls nRF905 wireless transceiver module to realize signal transmitting between lower PC and upper PC installing of VI software of LabVIEW. System software combines FFT and wavelet analysis method to realize electric power parameter of harmonic analysis, which solves shortcoming of single FFT analysis. Through simulation experiment, method of combining FFT with wavelet transform is verified to be accurate.