The Research And Design Harmonic Detection System Based On ARM Hardware

With the continuous development of power grid and progress,a lot of power electronic devices,and the wide use of nonlinear load,the harmonic pollution is getting worse,serious impact on the power supply reliability of power system,power system accident even.In order to ensure the safety of electric power system can run the economy and people’s life safety,for real-time harmonic detection and analysis is the key.This thesis mainly studies the harmonic detection of related theory and technology,designed and implemented the harmonic detection system based on ARM hardware.Harmonic detection algorithm,this paper studied the operation speed,accuracy,portability,and adaptive ability from several aspects such as compared to the commonly used several kinds of harmonic detection algorithm,aiming at the likely in harmonic detection frequency spectrum leakage and fence effect of in-depth analysis,and put forward the window of the interpolation FFT algorithm combined with wavelet transform,and has carried on the simulation to this algorithm.Then the design of harmonic detection system hardware and software modules,mainly including data acquisition module and the ARM module hardware design,as well as the whole software design based on ARM chips.Finally,the paper on the harmonic detection system is the system debugging and fimction verification,the results show that the system has high detection precision and real-time performance,can satisfy the requirements of the power grid harmonic detection,and put forward the need to continue the further study and improvement.