Research and Design of Intelligent Wireless Harmonic Detection of Electric Power System

Aiming at high voltage monitoring hazard of power electric parameter, data statistical inconvenience, and present detection device poor precision, etc, we design a kind of wireless power electric parameter detection system based on single chip microprocessor (SCM) technology, wireless communication technology, FFT, and wavelet multi-resolution technology, etc. Lower PC acts SCM as core of processor, uses voltage/currency transformer module and signal processor module to realize electric network signal conversion, which can be recognized by MSP430F149 and completes signal A/D transfer by itself ADC12 module, as well as controls nRF905 wireless transceiver module to realize signal transmitting between lower PC and wireless receiving module of upper PC in real time. In addition, system software adopts a new method of combining wavelet resolution analysis with FFT, which solves FFT disadvantage of non-steady distortion signal analysis. System not only can be applied to basic power electric parameter but also to harmonic and voltage fluctuation, flicker detection, etc, which can realize power network voltage display, harmonic compensation, and alarming. This paper mainly introduces system's structure, part of hardware and software design in detail.