Application of Discrete Variable-Gain-Based Self-Immunity Control to Flywheel Energy Storage Systems

Jian Sun, Pengju Yin () and Xiangliu Song
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Jian Sun: Hubei Provincial Engineering Research Center of Intelligent Energy Technology, Yichang 443002, China
Pengju Yin: College of Electrical and New Energy, China Three Gorges University, Yichang 443002, China
Xiangliu Song: College of Electrical and New Energy, China Three Gorges University, Yichang 443002, China

Energies, 2024, vol. 17, issue 21, 1-15

Abstract: For the study of the trade-off between steady-state error and transient response in control systems for flywheel energy storage, a controller with a discrete variable gain is proposed. This controller aims to adapt to changes in the system state by dynamically adjusting the controller gain to optimize the system’s anti-disturbance performance. Theoretical analysis and mathematical derivation demonstrate that increasing the observer gain can significantly enhance the system’s anti-disturbance capability. However, this increase also results in overshooting, which highlights the limitations of traditional control methods in achieving both system stability and anti-disturbance performance. A discrete variable-gain extended state observer is designed. The gain of this observer can be adaptively adjusted according to a system state value, enabling the effective control of both steady-state error and transient response. Additionally, the stability of the proposed control method was analyzed and verified, ensuring its effectiveness and reliability for practical applications. Finally, the effectiveness of the proposed method in improving system performance is demonstrated by simulation results.

Keywords: flywheel energy storage system; discharge control; discrete variable-gain linear self-immunity controller (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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