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High-speed flywheel energy storage connected via back-to-back converters presents an economical and reliable solution for short-duration, high-frequency grid frequency regulation. To meet the active support demands of modern power systems, this paper proposes a grid-forming control strategy for flywheel systems based on matched control principles. The grid-side converter (GSC) employs matched control algorithms to enable grid-forming capability, while the motor-side converter (MSC) integrates inertia emulation and primary frequency regulation. To enhance the accuracy and robustness of DC-link voltage derivative estimation, a Nonlinear Tracking Differentiator (NTD) is introduced. Simulation studies conducted in MATLAB/Simulink validate the effectiveness and feasibility of the proposed approach.

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Grid-Forming Strategy for Flywheel Energy Storage Based on Matched Control

  • 会议论文

  • 发表日期：

    2026年

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  • Yongjian Bi,
  • Xisheng Tang,
  • Guanjie Liu,
  • Taian Wang,
  • Yuntao Zou

摘要

High-speed flywheel energy storage connected via back-to-back converters presents an economical and reliable solution for short-duration, high-frequency grid frequency regulation. To meet the active support demands of modern power systems, this paper proposes a grid-forming control strategy for flywheel systems based on matched control principles. The grid-side converter (GSC) employs matched control algorithms to enable grid-forming capability, while the motor-side converter (MSC) integrates inertia emulation and primary frequency regulation. To enhance the accuracy and robustness of DC-link voltage derivative estimation, a Nonlinear Tracking Differentiator (NTD) is introduced. Simulation studies conducted in MATLAB/Simulink validate the effectiveness and feasibility of the proposed approach.