Five-leg converter topology for wind energy conversion system with doubly fed induction generator

Abstract

. (2011) 'Five-leg converter topology for wind energy conversion system with doubly fed induction generator.', Renewable energy., 36 (11). pp. 3187-3194. Further information on publisher's website:http://dx.doi.org/10.1016/j.renene. 2011.03.014 Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Renewable Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Renewable Energy, 36, November 2011, 10.1016/j.renene.2011.03.014. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

Open-circuit switch fault tolerant wind energy conversion system based on six/five-leg reconfigurable converter

“…It means that with the same dc-link voltage, smaller three-phase voltages at the AC terminals can be produced, compared to the six-leg converter [27]. Also the current rating in the shared leg of the converter is larger than in the other legs.…”

“…A proper current rating of the shared leg has to be also consisdered. These studies can be found in an earlier contribution [27], where for a WECS with DFIG, different schemes for the minimization of the required dc-link voltage in post-fault mode are discussed.…”

“…Here, the voltage references for the grid side converter (GSC) and rotor side converter (RSC) are calculated based on the classical vector control strategies, similar to what is presented in [27], [32]. Control of RSC is especially important for the dynamic of the system.…”

“…is the rotor signals pulsation; , and are total stator inductance, magnetizing inductance and total rotor inductance respectively [27]. The reconfigured voltage reference generation and PWM can be explained as the flowchart shown in Fig.…”

“…The five-leg converter topology is already proposed for applications such as AC/AC converter for a three-phase induction motor drive [23,24], control of two three-phase machines [25] and reversible fault-tolerant AC motor drive systems [26]. Its application in a DFIG-based WECS is investigated and compared to a back-to-back six-leg converter in [27].…”