SUB-SYNCHRONOUS OSCILLATION SUPPRESSION STRATEGY FOR D-PMSG BASED ON ROBUST COMPOSITE CONTROL

Fang Chenzhi; Ren Yongfeng; Guo Mingzhu; Chen Jian; Chang Yong; Wu Jinbo

doi:10.19912/j.0254-0096.tynxb.2024-0143

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (5) : 592-601. DOI: 10.19912/j.0254-0096.tynxb.2024-0143

SUB-SYNCHRONOUS OSCILLATION SUPPRESSION STRATEGY FOR D-PMSG BASED ON ROBUST COMPOSITE CONTROL

Fang Chenzhi¹, Ren Yongfeng¹, Guo Mingzhu², Chen Jian¹, Chang Yong², Wu Jinbo²

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Abstract

Aimed at the sub-synchronous oscillation issues arising from the interaction between direct-drive wind turbines and weak AC grids, a robust composite control strategy for suppressing sub-synchronous oscillation is proposed. First, the virtual synchronous generator （VSG） control principle is used to construct the grid-side inverter sequential impedance model, and the system stability is assesed according to its amplitude-frequency characteristic curve. Then, the analytical derivation analysis concludes that the PI controller in the currentloop exacerbates the oscillations as a key factor, which is replaced by active disturbance rejection control （ADRC）. Additionally an additional damping controller based on the uncertainty and disturbance estimator （UDE） is designed to synergistically suppress the disturbances. Finally, the corresponding single control and composite control simulation models are established based on the Matlab/Simulink platform, and simulation results verify the applicability and practicality of the robust composite control strategies.

Key words

stability / virtual synchronous generator / sub-synchronous oscillation / additional damping control / permanent magnet synchronous machine

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Fang Chenzhi, Ren Yongfeng, Guo Mingzhu, Chen Jian, Chang Yong, Wu Jinbo. SUB-SYNCHRONOUS OSCILLATION SUPPRESSION STRATEGY FOR D-PMSG BASED ON ROBUST COMPOSITE CONTROL[J]. Acta Energiae Solaris Sinica. 2025, 46(5): 592-601 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0143

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