POWER SYSTEM LOW-FREQUENCY OSCILLATION DAMPING BASED ON MULTI-STEP OPTIMIZATION AND CONSTRAINT BOUNDARY ADJUSTMENT OF DFIG-MBSDC PARAMETERS

Li Shenghu; Wang Zhuang

doi:10.19912/j.0254-0096.tynxb.2023-2136

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (4) : 530-540. DOI: 10.19912/j.0254-0096.tynxb.2023-2136

POWER SYSTEM LOW-FREQUENCY OSCILLATION DAMPING BASED ON MULTI-STEP OPTIMIZATION AND CONSTRAINT BOUNDARY ADJUSTMENT OF DFIG-MBSDC PARAMETERS

Li Shenghu^1,2, Wang Zhuang^1,2

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Abstract

With the multi-band supplementary damping controller （MBSDC） at doubly-fed induction generator （DFIG）, multiple low-frequency oscillation （LFO） modes in the power system may be damped, but the control effect is related to the MBSDC’s parameters. The single-step optimization based on the eigen-sensitivity has the truncation error, and the critical modes and the key parameters may change after optimization, thus the control effect can not be guaranteed. In this paper, the small-disturbance stability model of power system with DFIGs is derived. The severity degree of the critical modes is applied to weight the relative sensitivity of the LFO modes and find the critical parameters of the MBSDC. A multi-step optimization model for parameter optimization is proposed. The sensitivity model of the objective function with respect to the limits of the constraints is proposed to adjust the control parameters and improve the damping effect. The simulation results with small/large disturbances are provided to verify the damping effect of the proposed multi-step optimization model and the constraint boundary adjustment methods for the DFIG-MBSDC.

Key words

wind power / sensitivity analysis / optimization / low-frequency oscillation （LFO） / multi-band supplementary damping controller （MBSDC） / constraint boundary adjustment

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Li Shenghu, Wang Zhuang. POWER SYSTEM LOW-FREQUENCY OSCILLATION DAMPING BASED ON MULTI-STEP OPTIMIZATION AND CONSTRAINT BOUNDARY ADJUSTMENT OF DFIG-MBSDC PARAMETERS[J]. Acta Energiae Solaris Sinica. 2025, 46(4): 530-540 https://doi.org/10.19912/j.0254-0096.tynxb.2023-2136

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