Abstract:
In recent publications, a sliding mode controller has been shown to quickly mitigate wind turbine drivetrain torsional oscillations in grid tied DFIG turbines where the d...Show MoreMetadata
Abstract:
In recent publications, a sliding mode controller has been shown to quickly mitigate wind turbine drivetrain torsional oscillations in grid tied DFIG turbines where the disturbance arises from either the wind or grid. It has also been shown that this sliding mode controller damps wind caused torsional oscillations in PMSG turbines where the power electronics essentially isolate the turbine from grid disturbances. The sliding mode controller uses the filtered generator speed as feedback. The current study examines the bandwidth of the generator speed filter on the damping ability of the controller. Also a sliding control is introduced by developing an estimation process for the disturbances giving rise to drivetrain torsional oscillations. The various torsional damping controllers are each paired with an optimal Koptωr2 speed controller which is used as the base control. The paper presents a comparison between (1) no compensation, (2) narrow band sliding mode control, (3) wide band sliding mode control, and (4) sliding control with disturbance estimation. The results show a dependence on the generator type with the narrow band sliding mode and sliding controllers providing the best performance for the DFIG and the PMSG wind turbines.
Published in: 2016 American Control Conference (ACC)
Date of Conference: 06-08 July 2016
Date Added to IEEE Xplore: 01 August 2016
ISBN Information:
Electronic ISSN: 2378-5861