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An Improved Droop Control Method for Multi-Terminal VSC-HVDC Converter Stations

Author

Listed:
  • Hao Wang

    (Power Electronics & Renewable Energy Research Center, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China
    Department of Energy Technology, Aalborg University, Pontoppidanstraede 101, Aalborg DK-9220, Denmark)

  • Yue Wang

    (Power Electronics & Renewable Energy Research Center, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China)

  • Guozhao Duan

    (Power Electronics & Renewable Energy Research Center, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China)

  • Weihao Hu

    (Department of Energy Technology, Aalborg University, Pontoppidanstraede 101, Aalborg DK-9220, Denmark)

  • Wenti Wang

    (Power Electronics & Renewable Energy Research Center, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China)

  • Zhe Chen

    (Department of Energy Technology, Aalborg University, Pontoppidanstraede 101, Aalborg DK-9220, Denmark)

Abstract

Multi-terminal high voltage direct current transmission based on voltage source converter (VSC-HVDC) grids can connect non-synchronous alternating current (AC) grids to a hybrid alternating current and direct current (AC/DC) power system, which is one of the key technologies in the construction of smart grids. However, it is still a problem to control the converter to achieve the function of each AC system sharing the reserve capacity of the entire network. This paper proposes an improved control strategy based on the slope control of the DC voltage and AC frequency (V–f slope control), in which the virtual inertia is introduced. This method can ensure that each AC sub-system shares the primary frequency control function. Additionally, with the new control method, it is easy to apply the secondary frequency control method of traditional AC systems to AC/DC hybrid systems to achieve the steady control of the DC voltage and AC frequency of the whole system. Most importantly, the new control method is better than the traditional control method in terms of dynamic performance. In this paper, a new control method is proposed, and the simulation model has been established in Matlab/Simulink to verify the effectiveness of the proposed control method.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:843-:d:102455
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    Citations

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    Cited by:

    1. Fahad Alsokhiry & Grain Philip Adam, 2020. "Multi-Port DC-DC and DC-AC Converters for Large-Scale Integration of Renewable Power Generation," Sustainability, MDPI, vol. 12(20), pages 1-21, October.
    2. Weipeng Yang & Aimin Zhang & Jungang Li & Guoqi Li & Hang Zhang & Jianhua Wang, 2017. "Integral Plus Resonant Sliding Mode Direct Power Control for VSC-HVDC Systems under Unbalanced Grid Voltage Conditions," Energies, MDPI, vol. 10(10), pages 1-17, October.
    3. Jelena Stojković & Aleksandra Lekić & Predrag Stefanov, 2020. "Adaptive Control of HVDC Links for Frequency Stability Enhancement in Low-Inertia Systems," Energies, MDPI, vol. 13(23), pages 1-20, November.
    4. 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.
    5. Marta Haro-Larrode & Maider Santos-Mugica & Agurtzane Etxegarai & Pablo Eguia, 2020. "Methodology for Tuning MTDC Supervisory and Frequency-Response Control Systems at Terminal Level under Over-Frequency Events," Energies, MDPI, vol. 13(11), pages 1-20, June.

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