The Research Of APF Control Strategy Based On The Harmonic Detection Algorithm Of SAPDFT

In order to optimize the control strategy of Active Power Filter (APF),This paperresearched the two key techniques of APF that were harmonic current detection andcompensation current tracking control.In harmonic detection respect, applicaed the newharmonic detection algorithm that was sliding All Phase Fourier Transform (SAPDFT),this algorithm was put forward based on the phase invariability of All Phase FourierTransform (APDFT), This paper imptoved the realization process of APDFT by slidingwindow technology. SAPDFT could ensure phase be detected accurately when the gridwas frequency drift and had noise jamming, shortened the signal processing cycle,improved the traking detection performance.In compensation current tracking controlrespect, applicaed a combined control algorithm which was combined with recursionintegration PI control and disperse sliding model control, that combined controlalgorithm could enhance the stability and precision of the system. Designed harmoniccompensator digital control system based on32bit DSP (TMS320F2812), and designedthe system hardware and software. Finally, through MATLAB, detection performanceof sliding window all phase Fourier transform,and set up the simulation model of shuntAPF by the SIMULIK, made the emulate experiment of APF combined the slidingwindow all phase Fourier transform detection and indefinite hysteresis loop space vectorPWM control algorithm.