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Multi-Port High Voltage Gain Modular Power Converter for Offshore Wind Farms

Author

Listed:
  • Sen Song

    (Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool L69 3BX, UK)

  • Yihua Hu

    (Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool L69 3BX, UK)

  • Kai Ni

    (Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool L69 3BX, UK)

  • Joseph Yan

    (Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool L69 3BX, UK)

  • Guipeng Chen

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Huiqing Wen

    (Department of Electrical Engineering and Electronics, Xi’an Jiaotong-Liverpool University, Suzhou 215123, China)

  • Xianming Ye

    (Department of Electrical, Electronic and Computer Engineering, University of Pretoria, Pretoria 0084, South Africa)

Abstract

In high voltage direct current (HVDC) power transmission of offshore wind power systems, DC/DC converters are applied to transfer power from wind generators to HVDC terminals, and they play a crucial role in providing a high voltage gain, high efficiency, and high fault tolerance. This paper introduces an innovative multi-port DC/DC converter with multiple modules connected in a scalable matrix configuration, presenting an ultra-high voltage step-up ratio and low voltage/current rating of components simultaneously. Additionally, thanks to the adoption of active clamping current-fed push–pull (CFPP) converters as sub-modules (SMs), soft-switching is obtained for all power switches, and the currents of series-connected CFPP converters are auto-balanced, which significantly reduce switching losses and control complexity. Furthermore, owing to the expandable matrix structure, the output voltage and power of a modular converter can be controlled by those of a single SM, or by adjusting the column and row numbers of the matrix. High control flexibility improves fault tolerance. Moreover, due to the flexible control, the proposed converter can transfer power directly from multiple ports to HVDC terminals without bus cable. In this paper, the design of the proposed converter is introduced, and its functions are illustrated by simulation results.

Suggested Citation

  • Sen Song & Yihua Hu & Kai Ni & Joseph Yan & Guipeng Chen & Huiqing Wen & Xianming Ye, 2018. "Multi-Port High Voltage Gain Modular Power Converter for Offshore Wind Farms," Sustainability, MDPI, vol. 10(7), pages 1-15, June.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:7:p:2176-:d:154453
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    References listed on IDEAS

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    1. Fernando Martinez-Rodrigo & Dionisio Ramirez & Alexis B. Rey-Boue & Santiago De Pablo & Luis Carlos Herrero-de Lucas, 2017. "Modular Multilevel Converters: Control and Applications," Energies, MDPI, vol. 10(11), pages 1-26, October.
    2. Hao Wang & Yue Wang & Guozhao Duan & Weihao Hu & Wenti Wang & Zhe Chen, 2017. "An Improved Droop Control Method for Multi-Terminal VSC-HVDC Converter Stations," Energies, MDPI, vol. 10(7), pages 1-13, June.
    3. Yang, Zhimin & Chai, Yi, 2016. "A survey of fault diagnosis for onshore grid-connected converter in wind energy conversion systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 66(C), pages 345-359.
    4. Minh Quan Duong & Sonia Leva & Marco Mussetta & Kim Hung Le, 2018. "A Comparative Study on Controllers for Improving Transient Stability of DFIG Wind Turbines During Large Disturbances," Energies, MDPI, vol. 11(3), pages 1-18, February.
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    Cited by:

    1. Sen Song & Wei Li & Kai Ni & Hui Xu & Yihua Hu & Jikai Si, 2018. "Modular Multi-Port Ultra-High Power Level Power Converter Integrated with Energy Storage for High Voltage Direct Current (HVDC) Transmission," Energies, MDPI, vol. 11(10), pages 1-17, October.
    2. Maysam Abbasi & Ehsan Abbasi & Li Li & Behrouz Tousi, 2021. "Design and Analysis of a High-Gain Step-Up/Down Modular DC–DC Converter with Continuous Input Current and Decreased Voltage Stress on Power Switches and Switched-Capacitors," Sustainability, MDPI, vol. 13(9), pages 1-19, May.

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