Wavelet-based power quantification approaches

This paper presents alternative computing methods for power related quantities using wavelet transforms. First of all, two alternatives for classical reactive power quantities based on real wavelet transform are given, having advantages over the methods published in literature for the calculation of reactive power. They are based on the implementation of a time delay in the wavelet domain and an a method splitting the current in an active and reactive component. Secondly, a totally different method is presented using complex wavelet transforms, allowing the formulation of power definitions in the time-frequency domain itself, similar to Fourier-based power definitions, but theoretically yielding continuously varying power quantities. All approaches are illustrated with examples.