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Thermal Analysis of Power Converters for DFIG-Based Wind Energy Conversion Systems during Voltage Sags

Author

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  • Igor Rodrigues de Oliveira

    (Graduate Program in Electrical Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil)

  • Fernando Lessa Tofoli

    (Department of Electrical Engineering, Federal University of São João del-Rei, São João del-Rei 36307-352, Brazil)

  • Victor Flores Mendes

    (Graduate Program in Electrical Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil)

Abstract

The doubly fed induction generator (DFIG) and back-to-back converter are very sensitive to power quality disturbances in grid-connected wind energy conversion systems (WECSs). Special attention has been given to protect the system from voltage sags, considering the introduction of several low-voltage ride-through (LVRT) techniques in the literature. However, only few works have really analyzed the behavior of power semiconductors during such phenomena in terms of the thermal stresses, whereas the existing studies are focused on balanced voltage sags only. In this context, this work presents a thermal profile analysis of power semiconductors in the grid-side converter (GSC) and rotor-side converter (RSC) considering a DFIG-based WECS submitted to symmetrical and asymmetrical voltage sags. The system is modeled using PLECS software and results on a 2.0 MW system are presented and thoroughly discussed. The results show that it is possible to meet the ride-through requirements during both balanced and unbalanced sags in terms of acceptable thermal stresses on the semiconductors as long as the back-to-back converter and its respective control system are properly designed.

Suggested Citation

  • Igor Rodrigues de Oliveira & Fernando Lessa Tofoli & Victor Flores Mendes, 2022. "Thermal Analysis of Power Converters for DFIG-Based Wind Energy Conversion Systems during Voltage Sags," Energies, MDPI, vol. 15(9), pages 1-21, April.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:9:p:3152-:d:802326
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    References listed on IDEAS

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    1. Emre Ozsoy & Sanjeevikumar Padmanaban & Lucian Mihet-Popa & Viliam Fedák & Fiaz Ahmad & Rasool Akhtar & Asif Sabanovic, 2017. "Control Strategy for a Grid-Connected Inverter under Unbalanced Network Conditions—A Disturbance Observer-Based Decoupled Current Approach," Energies, MDPI, vol. 10(7), pages 1-17, July.
    2. Hu, Jiabing & He, Yikang, 2011. "DFIG wind generation systems operating with limited converter rating considered under unbalanced network conditions – Analysis and control design," Renewable Energy, Elsevier, vol. 36(2), pages 829-847.
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    Cited by:

    1. Ramesh Kumar Behara & Akshay Kumar Saha, 2023. "Neural Network Predictive Control for Improved Reliability of Grid-Tied DFIG-Based Wind Energy System under the Three-Phase Fault Condition," Energies, MDPI, vol. 16(13), pages 1-47, June.

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