Compensation method for a voltage unbalance

Details Compensation method for a voltage unbalance Compensation method for a voltage unbalance

2005-12-06

2005-12-06

Han, Jessica (Department: 2838)

Electric power conversion systems

Frequency conversion without intermediate conversion to d.c.

With automatic voltage magnitude control

C363S009000, C363S047000, C363S165000

Reexamination Certificate

active

06972976

ABSTRACT:
The invention relates to a method for compensating for a voltage unbalance in an electrical network, which is fed by using an apparatus based on controlling a flux linkage vector or a voltage vector. Concerning the apparatus based on controlling the flux linkage vector, the method comprises the steps of determining a flux linkage reference vector comprising a positive sequence component and a negative sequence component, and controlling the feeding apparatus of the network in such a manner that the flux linkage vector thereof follows the reference vector with predetermined precision. The negative sequence component of the flux linkage reference vector is arranged to compensate for the amplitude and phase unbalance of the voltage in the electrical network to be fed.

REFERENCES:
patent: 5148361 (1992-09-01), Braun et al.
patent: 6031738 (2000-02-01), Lipo et al.
patent: 6094364 (2000-07-01), Heikkila
patent: 6154378 (2000-11-01), Peterson et al.
patent: 6163472 (2000-12-01), Colby
patent: 40 14 077 (1992-12-01), None
patent: WO 99/44276 (1999-09-01), None
patent: WO 02/075915 (2002-09-01), None

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