
38-26 Power Electronics and Motor Drives
methods based on the fast Fourier transformation (FFT) is the fast response obtained. On the other side,
frequency domain methods provide accurate individual and multiple harmonic load-current detection.
e discrete Fourier transform, the Kalman lter, and the articial neural networks are the most har-
monic estimation techniques. ere are two control techniques used to generate switching signals for
APFs, namely, the direct and the indirect control techniques [12–15]. e direct method detects har-
monics in the loads and injects current through an active lter to cancel the harmonics. On the other
ha ...