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Improved Droop Control with Washout Filter

Author

Listed:
  • Yalong Hu

    (College of Electrical and engineering, Zhejiang University, Hangzhou 310027, China)

  • Wei Wei

    (College of Electrical and engineering, Zhejiang University, Hangzhou 310027, China)

Abstract

In this paper, a droop washout filter controller (DWC), composed of a conventional droop controller and a washout filter controller, is proposed. The droop controller is used to ensure the “plug-and-play” capability, and the droop gain is set small. The washout filter is introduced to compensate the active power dynamic performance (APDP). Compared to the droop controller, the DWC can achieve accurate active power sharing and smaller frequency difference without losing the APDP. Additionally, a novel modeling technology is proposed, using which a small-signal model for an island microgrid (MG) is constructed as a singular system. The system’s stability is analyzed and the DWC is verified using real-time (RT-LAB) simulation with hardware in the loop (HIL).

Suggested Citation

  • Yalong Hu & Wei Wei, 2018. "Improved Droop Control with Washout Filter," Energies, MDPI, vol. 11(9), pages 1-18, September.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2415-:d:169371
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    References listed on IDEAS

    as
    1. Demin Li & Bo Zhao & Zaijun Wu & Xuesong Zhang & Leiqi Zhang, 2017. "An Improved Droop Control Strategy for Low-Voltage Microgrids Based on Distributed Secondary Power Optimization Control," Energies, MDPI, vol. 10(9), pages 1-18, September.
    2. Chunxia Dou & Zhanqiang Zhang & Dong Yue & Hanxiao Gao, 2017. "An Improved Droop Control Strategy Based on Changeable Reference in Low-Voltage Microgrids," Energies, MDPI, vol. 10(8), pages 1-18, July.
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    Cited by:

    1. Teuvo Suntio & Tuomas Messo, 2019. "Power Electronics in Renewable Energy Systems," Energies, MDPI, vol. 12(10), pages 1-5, May.
    2. Farag K. Abo-Elyousr & Hossam S. Abbas & Ali M. Yousef & Nguyen Vu Quynh & Ziad M. Ali & Muhammad Shahzad Nazir, 2020. "Oscillation Damping for Wind Energy Conversion System with Doubly Fed Induction Generator Association with Synchronous Generator," Energies, MDPI, vol. 13(19), pages 1-18, September.

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