Digital Controller of Single Phase Active Power Filter and control method thereof

摘要

Single Phase to start the digital controller and the control method of active power filter. Digital control of the single-phase active power filter with a DSP (Digital Signal Processing) according to the present invention, by performing the FFT (Fast Fourier Transform) operation on the load current detected by non-linear loads, generating a first reference current and the resulting The phase delay of the first reference current and the compensation current reference generator for generating a second reference current with a power factor improvement, DC voltage controller for extracting a disturbance component of the second reference current, the second reference current and the disturbance component an addition to the current control means comprises, based on the output current of the adder and generates the inverter is detected and the third reference current for generating a third reference current to control the output current of the inverter. Thereby, the present invention corrects the phase delay of the reference signal or the reference current, independently of each harmonic component, there is an effect that it is possible to efficiently remove the harmonic current from the non-linear.