Zero phase sequence current filter with adjustable impedance

Details Zero phase sequence current filter with adjustable impedance Zero phase sequence current filter with adjustable impedance

H - Electricity

02

J

H02J 3/01 (2006.01) H01F 29/02 (2006.01) H02H 9/00 (2006.01) H02M 1/12 (2006.01) H02H 3/00 (2006.01)

Patent

CA 2143264

The invention provides a zero phase sequence current zig-zag filter with adjustable zero phase sequence impedance and a method for adjusting the impedance of the filter. Impedance is adjusted in discrete increments by detuning the filter one phase at a time. Detuning is accomplished using taps or auxiliarywindings, whereby the ratio of the effective number of turns of the first winding relative to the second winding on the same core leg is changed independently foreach phase of a three phase power supply.

Cette invention permet d'obtenir un filtre de courant en zig-zag au point nul de phase avec une impédance réglable au point nul de phase et une méthode d'ajustement de l'impédance du filtre. On ajuste cette impédance par augmentations discrètes en désaccordant le filtre à raison d'une phase à la fois. Ce désaccord s'effectue par des prises ou des enroulements auxiliaires, ce qui permet de changer le rapport du nombre de tours réels du premier enroulement relativement au deuxième sur la même jambe du noyau indépendamment pour chaque phase de l'alimentation électrique triphasée.

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