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Direct connection of WECS system to the MV grid with multilevel converters

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  • Verne, Santiago A.
  • Valla, María I.

Abstract

A medium voltage power interface for a variable speed Wind Turbine is presented in this paper. The converter topology consists on the Back-to-Back connection of two medium voltage Diode Clamped Multilevel Inverters (DCMI) in the full power path. This mitigates traditional tradeoffs around the low voltage connection between the generator and the grid on the megawatt range. Also, this configuration allows for higher control versatility for grid codes compliance. The converter controllers are based on a Finite-States Model Predictive Control approach, leading to fast dynamic response and DC bus voltage equalization. The control scheme can be used with converters of an arbitrary number of levels with reduced computational effort. This is based on necessary switching restrictions which allow the reliable operation of converter legs. The performance of the control scheme is evaluated through computer simulations.

Suggested Citation

  • Verne, Santiago A. & Valla, María I., 2012. "Direct connection of WECS system to the MV grid with multilevel converters," Renewable Energy, Elsevier, vol. 41(C), pages 336-344.
    • Handle: RePEc:eee:renene:v:41:y:2012:i:c:p:336-344
    DOI: 10.1016/j.renene.2011.11.022
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    References listed on IDEAS

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    1. Abbes, Mohamed & Belhadj, Jamel & Ben Abdelghani Bennani, Afef, 2010. "Design and control of a direct drive wind turbine equipped with multilevel converters," Renewable Energy, Elsevier, vol. 35(5), pages 936-945.
    2. Fernandez, L.M. & Garcia, C.A. & Jurado, F., 2010. "Operating capability as a PQ/PV node of a direct-drive wind turbine based on a permanent magnet synchronous generator," Renewable Energy, Elsevier, vol. 35(6), pages 1308-1318.
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    Cited by:

    1. Al-Saffar, Mustafa A. & Ismail, Esam H. & Sabzali, Ahmad J., 2013. "Family of ZC-ZVS converters with wide voltage range for renewable energy systems," Renewable Energy, Elsevier, vol. 56(C), pages 32-43.
    2. Goudarzian, Alireza & Khosravi, Adel & Raeisi, Heidar Ali, 2020. "Analysis of a step-up dc/dc converter with capability of right-half plane zero cancellation," Renewable Energy, Elsevier, vol. 157(C), pages 1156-1170.

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