Active power filter control algorithms using wavelet-based power definitions

A novel method to determine the reference filter current for an active power conditioner filtering harmonic current components and/or current contributing to reactive power is presented. It is based on definitions of active and reactive power quantities in the time-frequency domain associated to complex wavelets, allowing a better time localization than Fourier-based quantities. Its behavior is illustrated in a well-chosen single-phase example. The properties of the method are discussed and compared to traditional compensation methods.