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

Rafael Pena Alzola, David Campos-Gaona, Peter Ksiazek, Martin Ordonez

Research output: Contribution to journalArticle

15 Citations (Scopus)

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.
LanguageEnglish
Pages4812-4826
Number of pages15
JournalIEEE Transactions on Power Electronics
Volume32
Issue number6
Early online date4 Aug 2016
DOIs
Publication statusPublished - 30 Jun 2017

Fingerprint

Synchronous generators
Wind turbines
Permanent magnets
Torque
Wave filters
Notch filters
Energy conversion
Wind power
Butterworth filters
Bandwidth
Turbogenerators
Electric potential
Voltage control
Telecommunication links
Feedback
Heating
Experiments

Keywords

  • lead-lag
  • wind turbine
  • PMSG
  • torque ripple
  • load current
  • filters
  • Butterworth filter
  • notch filter
  • antiresonant filter
  • moving average filter

Cite this

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title = "DC-link control filtering options for torque ripple reduction in low power wind turbines",
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.",
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DC-link control filtering options for torque ripple reduction in low power wind turbines. / Pena Alzola, Rafael; Campos-Gaona, David; Ksiazek, Peter; Ordonez, Martin.

In: IEEE Transactions on Power Electronics, Vol. 32, No. 6, 30.06.2017, p. 4812-4826.

Research output: Contribution to journalArticle

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AU - Pena Alzola, Rafael

AU - Campos-Gaona, David

AU - Ksiazek, Peter

AU - Ordonez, Martin

N1 - © 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.

PY - 2017/6/30

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N2 - 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.

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KW - lead-lag

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