RESEARCH AND OPTIMIZATION OF QPR-NLADRC IMPROVED MMC CONTROL STRATEGY

Lyu Pin; Xu Donghui; Guan Wanlin; Zhang Meiting; Zhang Chenxi; Kang Xueshuo

doi:10.19912/j.0254-0096.tynxb.2024-2223

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 136-151. DOI: 10.19912/j.0254-0096.tynxb.2024-2223

RESEARCH AND OPTIMIZATION OF QPR-NLADRC IMPROVED MMC CONTROL STRATEGY

Lyu Pin¹, Xu Donghui¹, Guan Wanlin², Zhang Meiting¹, Zhang Chenxi¹, Kang Xueshuo¹

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Abstract

Back-to-back modular multilevel converter （MMC） has been applied widely to flexible DC transmission system, and its control strategy optimization can suppress system oscillation and improve stability. Firstly, the back-to-back MMC-HVDC grid-connected simulation model of permanent magnet direct-drive wind power system is built to monitor the quality of DC voltage and AC current at the common connection point, and the influence of PI parameters on grid-connected stability is analyzed. Then, for the key PI controller, a structure combining quasi-proportional resonance （QPR） and nonlinear active disturbance rejection control （NLADRC） is proposed, and the multi-objective improved egret optimization algorithm （MOISBOA） is used to optimize the parameters. Finally, the effectiveness of the proposed controller is verified by establishing the system impedance model.

Key words

back-to-back modular multi-level converters / multi-objective optimization / control system analysis / quasi-proportional resonance （QPR） / nonlinear active disturbance rejection control （NLADRC）

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Lyu Pin, Xu Donghui, Guan Wanlin, Zhang Meiting, Zhang Chenxi, Kang Xueshuo. RESEARCH AND OPTIMIZATION OF QPR-NLADRC IMPROVED MMC CONTROL STRATEGY[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 136-151 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2223

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