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Frequency Modulation Control of Grid-Forming Converter Based on LADRC-MI

Author

Listed:
  • Zejian Liu

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
    Key Laboratory of Clean Energy Technology of Guangdong Province, Guangzhou 510640, China)

  • Fengneng Li

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
    Key Laboratory of Clean Energy Technology of Guangdong Province, Guangzhou 510640, China)

  • Ping Yang

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
    Key Laboratory of Clean Energy Technology of Guangdong Province, Guangzhou 510640, China)

  • Xu Lin

    (Power Dispatch Control Center, Guangdong Power Grid Corporation, Guangzhou 510699, China)

  • Guozun Zhang

    (School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China
    Tianjin Key Laboratory of New Energy Power Conversion, Transmission and Intelligent Control, Tianjin 300384, China)

Abstract

The increasing proportion of new energy in the power system leads to a decrease in system inertia and weakens the frequency stability of the system. The use of grid-forming (GFM) control for inverters is an effective method to improve frequency stability in new energy generation systems. Due to uncertain disturbances in microgrids, it can cause changes in system frequency. A control strategy for linear active disturbance rejection control combined with model information (LADRC-MI) is proposed in this manuscript. In this method, the inertia level and damping of the system are improved by using virtual synchronous generator (VSG)-based GFM control. Then, the obtained part of the model information is written into the coefficient matrix of the linear extended state observer. The LADRC-MI is constructed to improve the immunity of the controller. Finally, the effectiveness of the strategy in improving the immunity and frequency stability of the converter is analyzed and verified.

Suggested Citation

  • Zejian Liu & Fengneng Li & Ping Yang & Xu Lin & Guozun Zhang, 2024. "Frequency Modulation Control of Grid-Forming Converter Based on LADRC-MI," Energies, MDPI, vol. 17(13), pages 1-13, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:13:p:3282-:d:1428784
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