About the role of the park imaginary power on the three-phase line voltagedrop

in this paper the line voltage drop concept is investigated and extended to non-sinusoidal conditions. The results are applied to the three-phase conf iguration. In this approach the presence of harmonic and sequence component s is taken into account. The formal invariance of the obtained results with respect to the original single-phase relationships is ensured by means of the three-phase rms concept. The Park transformation is used as well, so th at the three-phase relationships are reduced to a simpler formal single-pha se approach: the simultaneous contributions of harmonic and sequence compon ents are unified in a single formulation. Therefore the Park imaginary powe r role results as a natural extension of the usual single-phase reactive po wer concept.