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Damping of torsional vibrations in a type-IV wind turbine interfaced to a grid-forming converter
Avazov, A.; Colas, F.; Beerten, J.; Guillaud, X. (2021). Damping of torsional vibrations in a type-IV wind turbine interfaced to a grid-forming converter, in: 2021 IEEE Madrid PowerTech. pp. 6. https://dx.doi.org/10.1109/PowerTech46648.2021.9494824
In: (2021). 2021 IEEE Madrid PowerTech. IEEE: [s.l.]. ISBN 978-1-6654-1173-8; e-ISBN 978-1-6654-3597-0. [diff. pag.] pp. https://dx.doi.org/10.1109/PowerTech46648.2021, more

Available in  Authors 
Document type: Conference paper

Keyword
    Marine/Coastal
Author keywords
    damping; direct drive; inertial response; grid-forming control; torsional vibrations; voltage source converter; Type-IV wind turbine

Authors  Top 
  • Avazov, A., more
  • Colas, F.
  • Beerten, J., more
  • Guillaud, X.

Abstract
    This paper introduces a Type-IV wind turbine interfaced to a grid-forming converter. In order to retain the stable operation of a wind turbine in the presence of a grid-forming control, the classical control of a back-to-back converter has to be modified. The modification of this control creates a strong link between a wind turbine and grid dynamics. From the grid side perspective, this link allows provision of the inertial response from a wind turbine during transient events. On the wind turbine side, this coupling causes the appearance of the torsional vibrations within the drivetrain structure. These vibrations are then propagated to the grid as power oscillations. As a result, there is a negative impact on the mechanical components of a wind turbine as well as on the power system operation. In this work, a solution is introduced in order to suppress the undesired vibrations by applying a damping technique to the control of a back-to-back converter combined with a grid-forming control. Based on the conducted analysis, the addition of a damping filter results in the mitigation of torsional vibrations.

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