Method and arrangement in connection with network inverter

Details Method and arrangement in connection with network inverter Method and arrangement in connection with network inverter

2006-06-06

2006-06-06

Vu, Bao Q. (Department: 2838)

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

C363S044000, C363S047000

Reexamination Certificate

active

07057908

ABSTRACT:
A method in connection with a network inverter, an LCL network filter (3) being connected between the network inverter (1) and network (2), and the network inverter being arranged to operate as an active converter of harmonic components of electricity, and the method comprises the steps of forming a current reference (i1, ref) for the network inverter (1) for producing a desired voltage, selecting a harmonic electric component (v), the proportion of which needs to be changed, forming a current reference (i1, refv) altering the selected harmonic component (v), summing the generated current reference (i1, refv) altering the selected harmonic component with the current reference (i1, ref) of the network inverter to produce a summed current reference (i1, ref, tot), and controlling the network inverter with the summed current reference (i1, ref, tot) in a coordinate system bound to the virtual flux linkage of the network inverter by using DTC control.

REFERENCES:
patent: 5844791 (1998-12-01), Swamy
patent: 6009004 (1999-12-01), Swamy
patent: 6271651 (2001-08-01), Stratakos et al.
patent: 6339263 (2002-01-01), Lejonberg
patent: 6469919 (2002-10-01), Bennett
patent: 6618276 (2003-09-01), Bennett
patent: 6885567 (2005-04-01), Lincoln et al.
patent: 6956352 (2005-10-01), Tarkiainen et al.

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