DIGITAL CONTROLLER OF SINGLE PHASE ACTIVE POWER FILTER AND CONTROL METHOD THEREOF

摘要

A digital controller of a single phase active power filter and a control method thereof are provided to efficiently remove a nonlinear harmonic current by using a DSP(Digital Signal Processing). A first reference current generating part(222) generates a first reference current by performing a FFT(Fast Fourier Transform) operation about a load current. A second reference current generating part(223) generates a second reference current by correcting a phase delay of the first reference current. A DC voltage controller(224) extracts a disturbance component of the second reference current. An adder(225) generates a third reference current by adding the second reference current to the disturbance component. A current controller(226) controls an output current of an inverter(213) based on the third reference current.