抄録
In a balanced three-phase system, three-phase current distortion factor of three-phase AC power sources has been expressed by applying conventional single-phase current distortion factor which is defined for a single phase system. However, in an unbalanced three-phase system, it is difficult to express the three-phase current distortion factor for distorted three-phase AC currents by means of the conventional single-phase current distortion factor. For instance, the conventional current distortion factors for the three-phase AC currents are usually different from each other in the unbalanced three-phase system. To solve above problem, this paper proposes a novel definition of the three-phase current distortion factor. The proposed three-phase current distortion factor is quite effective for the unbalanced threephase system as well as the balanced three-phase system.
