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Speed-Adaptive Droop Control for Doubly Fed Induction Generator-Based Gravity Energy Storage System

Author

Listed:
  • Darui He

    (Economic Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210009, China)

  • Yan Li

    (Economic Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210009, China)

  • Chengjie Cao

    (Economic Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210009, China)

  • Yifei Fan

    (Economic Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210009, China)

  • Fei Wang

    (Economic Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210009, China)

  • Yuanshi Zhang

    (School of Electrical Engineering, Southeast University, Nanjing 210018, China)

  • Chenwen Cheng

    (School of Electrical Engineering, Southeast University, Nanjing 210018, China)

Abstract

In order to ensure the reliable operation of a gravity energy storage system and reduce a converter’s cost and power rating, this paper proposes a gravity energy storage system (GESS) based on a doubly fed induction generator (DFIG). To address the issues of low inertia and limited grid-support capability, a speed-adaptive droop control strategy is introduced. The droop curve can be adjusted automatically according to the speed variation. Thereby, the GESS can effectively provide grid support through rotor-speed control. A simulation model of the DFIG-based GESS is developed in MATLAB/Simulink 2024b, and the grid-support capability of the proposed control strategy is verified under various operating conditions.

Suggested Citation

  • Darui He & Yan Li & Chengjie Cao & Yifei Fan & Fei Wang & Yuanshi Zhang & Chenwen Cheng, 2025. "Speed-Adaptive Droop Control for Doubly Fed Induction Generator-Based Gravity Energy Storage System," Energies, MDPI, vol. 18(21), pages 1-19, October.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:21:p:5671-:d:1782018
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