DC-link control filtering options for torque ripple reduction in low power wind turbines

Pena Alzola, Rafael and Campos-Gaona, David and Ksiazek, Peter and Ordonez, Martin (2017) DC-link control filtering options for torque ripple reduction in low power wind turbines. IEEE Transactions on Power Electronics, 32 (6). pp. 4812-4826. ISSN 0885-8993 (https://doi.org/10.1109/TPEL.2016.2597844)

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Abstract

Small Wind Energy Conversion Systems (WECSs) are becoming an attractive option for distributed energy generation. WECSs use permanent magnet synchronous generators (PMSGs) directly coupled to the wind turbine and connected to the grid through a single-phase grid-tie converter. The loading produced on the DC-link is characterized by large ripple currents at twice the grid frequency. These ripple currents are reflected through the DC bus into the PMSG, causing increased heating and ripple torque. In this paper, the PMSG inverter is used to control the DC link voltage. In order to avoid reflecting the ripple currents into the PMSG, the feedback DC-link voltage is passed through a filter. The Butterworth filters, notch filters, antiresonant filter (ARF) and moving average filter (MAF) are considered. For a fair comparison, formulas are provided to tune the filter parameters so that DC-link voltage control will achieve the selected bandwidth. The different filtering options produce different levels of torque ripple reduction. Notch Filter, ARF and MAF obtain the best results and there is a trade-off between the filter implementation complexity, bandwidth, overshoot and the torque ripple reduction. Simulations and experiments using a 2.5 kW PMSG turbine generator validate the proposals.

ORCID iDs

Pena Alzola, Rafael, Campos-Gaona, David ORCID logoORCID: https://orcid.org/0000-0002-0347-6288, Ksiazek, Peter and Ordonez, Martin;
  • Item type:Article
    ID code:58154
    Dates:
    Date
    Event
    30 June 2017
    Published
    4 August 2016
    Published Online
    19 July 2016
    Accepted
    Notes:© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:14 Oct 2016 13:50
    Last modified:11 Nov 2024 11:32
    URI:https://strathprints.strath.ac.uk/id/eprint/58154
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