Effective apparent power definition based on sequence components for non-sinusoidal electric power quantities

In the present paper, effective apparent power based sequence components for non-sinusoidal electric quantities is proposed. The effective voltages and currents based sequence components contained in the old and new versions of the IEEE Std 1459 are given, only, at the fundamental frequency. These effective quantities are derived for the non-sinusoidal situations by means of the symmetrical harmonic components. The latter are obtained by the use of three transformation matrices. Two tests systems are used for the validation process. The resulted effective quantities based on symmetrical harmonic components are very similar to those based on the phase reference frame. The new alternative expressions can be considered as a new vision of power quality research and update, as well as, for diagnosis purposes in distorted and unbalanced power systems.