LADRC-BASED SECONDARY CONTROL STRATEGY OF DC-LINK VOLTAGE FOR DUAL PWM CONVERTER FLYWHEEL ENERGY STORAGE SYSTEM

Wei Le; Zhou Ziyu; Fang Fang; Wang Bingyu

doi:10.19912/j.0254-0096.tynxb.2023-1411

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (1) : 242-250. DOI: 10.19912/j.0254-0096.tynxb.2023-1411

LADRC-BASED SECONDARY CONTROL STRATEGY OF DC-LINK VOLTAGE FOR DUAL PWM CONVERTER FLYWHEEL ENERGY STORAGE SYSTEM

Wei Le, Zhou Ziyu, Fang Fang, Wang Bingyu

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Abstract

ALADRC-based secondary control strategy for the DC-link voltage of the FESS is proposed to deal with the voltage fluctuation problem caused by the charge/discharge switching of the FESS. The DC-link voltage and its differential value are considered as the state variables in this strategy. The internal and external disturbances, such as load power, switching loss, and parameter uncertainty, are regarded as an expanded state. This strategy can compensate the disturbance observation quantity caused by the switching of operation stages to the control quantity in real time. And add the secondary control to eliminate the steady state error of DC-link voltage when FESS faces the non-constant disturbance. Ensure that the FESS has good fast-tracking and anti-interference performance during the switching process while realizing error-free control. The effectiveness of the proposed control strategy is verified by simulation results at last.

Key words

flywheels / energy storage / rectifying circuits / voltage control / linear active disturbance rejection control / secondary control

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Wei Le, Zhou Ziyu, Fang Fang, Wang Bingyu. LADRC-BASED SECONDARY CONTROL STRATEGY OF DC-LINK VOLTAGE FOR DUAL PWM CONVERTER FLYWHEEL ENERGY STORAGE SYSTEM[J]. Acta Energiae Solaris Sinica. 2025, 46(1): 242-250 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1411

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