|RESEARCH ON COORDINATED FREQUENCY CONTROL STRATEGY BASED ON DFIG PITCH ANGLE AND VIRTUAL INERTIA

Zhang Li&#x02019;na; Wang Jinmei; Miao Haidong

doi:10.19912/j.0254-0096.tynxb.2024-2196

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 329-336. DOI: 10.19912/j.0254-0096.tynxb.2024-2196

|RESEARCH ON COORDINATED FREQUENCY CONTROL STRATEGY BASED ON DFIG PITCH ANGLE AND VIRTUAL INERTIA

Zhang Li’na¹, Wang Jinmei², Miao Haidong¹

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Abstract

Aiming at the problems of insufficient frequency regulation space and low dynamic response of the power system caused by large-scale wind power access, this paper proposes a new frequency coordination control strategy. Firstly, under the load-shedding reserve operation mode of doubly fed induction generator （DFIG）, pitch angle control is enhanced by introducing droop control. When system frequency drops, the DFIG releases its load-shedding reserve power, thereby compensating for the active power dip during DFIG rotor speed recovery and reducing steady-state frequency deviation in the system. Secondly, by incorporating a mechanical power compensation stage to enhance virtual inertia control, the system releases part of the kinetic energy stored in the DFIG rotor to support dynamic frequency response. This boosts system inertia and reduces dynamic frequency deviation. Finally, a power system simulation model was built through Matlab/Simulink. The simulation results show that this strategy effectively suppressed the fluctuation of system frequency caused by load changes and improved the stability of system frequency.

Key words

wind turbines / frequency control / system stability / virtual inertia control / pitch angle control

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Zhang Li’na, Wang Jinmei, Miao Haidong. |RESEARCH ON COORDINATED FREQUENCY CONTROL STRATEGY BASED ON DFIG PITCH ANGLE AND VIRTUAL INERTIA[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 329-336 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2196

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