Abstract
In a balanced three-phase system, the three-phase current distortion factor of three-phase ac power sources has been expressed by applying the 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 three-phase ac currents are usually different from each other in the unbalanced three-phase system. To solve the 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 three-phase system as well as the balanced three-phase system. © 2000 Scripta Technica, Electr Eng Jpn, 131(4): 1–10, 2000
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