Phase shifting transformer with low zero phase sequence...

Details Phase shifting transformer with low zero phase sequence... Phase shifting transformer with low zero phase sequence...

H - Electricity

01

F

H01F 30/12 (2006.01) H01F 30/02 (2006.01) H01F 30/14 (2006.01)

Patent

CA 2145958

A phase shifting transformer or autotransformer for a three phase power distribution network has a secondary winding comprising a plurality of windings distributed amongst the three core legs such that on each core leg the number ofturns of windings generating a flux in the positive direction is substantially equal to the number of turns of windings generating a flux in the negative direction. Thus, according to the invention, the transformer may be provided with any necessary phase shifting angles between different harmonic sources, with outputseach having a very low zero phase sequence impedance to reduce voltage distortion created by zero phase sequence harmonics.

n décaleur de phase ou autotransformateur pour un réseau de distribution triphasée a un enroulement secondaire comprenant plusieurs enroulements distribués parmi les trois jambes de noyau de façon que sur chaque jambe de noyau le nombre de spires des enroulements générant un flux dans le sens positif est substantiellement égal au nombre de spires des enroulements générant un flux dans le sens négatif. Ainsi, suivant l'invention, on peut donner au transformateur tous les angles de décalage nécessaires entre différentes sources harmoniques, chacune des sorties ayant une très basse impédance au point nul de la phase pour réduire la distorsion de tension créée par les harmoniques du point nul de la phase.

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