Patent ID: 9537437
Date: 2017-01-03
CPC Classifications: H02J,H02P,Y02E

Claim:
1. A method for operating a doubly-fed induction generator (DFIG) having controllable line-side and rotor-side converters and at least one harmonic attenuating filter, comprising: coordinating switching of the line-side converter with switching of the rotor-side converter such that a frequency of switching of the line-side converter differs from a frequency of switching of the rotor-side converter by a frequency offset to produce an interleaved switching pattern between the line-side converter and the rotor-side converter; and wherein the interleaved switching pattern produces an effective increased switching frequency applied to the associated harmonic attenuating filter; wherein the frequency offset is determined based at least in part on a rotor rotational frequency of the doubly-fed induction generator.