STABILITY ANALYSIS OF GRID-FORMING DOUBLY-FED INDUCTION GENERATOR

Yan Xiangwu; Zhang Shurui; Cai Guang; Ren Haoyang; Li Ruibo; Jia Jiaoxin

doi:10.19912/j.0254-0096.tynxb.2024-0899

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (10) : 561-569. DOI: 10.19912/j.0254-0096.tynxb.2024-0899

STABILITY ANALYSIS OF GRID-FORMING DOUBLY-FED INDUCTION GENERATOR

Yan Xiangwu, Zhang Shurui, Cai Guang, Ren Haoyang, Li Ruibo, Jia Jiaoxin

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Abstract

This paper conducts a comprehensive investigation into both small-disturbance and large-disturbance stability of the GFM-DFIG system, focusing on the influence of short-circuit ratio （SCR） and key system parameters. Firstly, a full-order small-signal model of the GFM-DFIG is developed, and root locus analysis is employed to reveal the impacts of the grid-forming link, current control link, and SCR on the system’s small-disturbance stability. Based on this full-order model, a reduced second-order model is then derived to analyze large-disturbance stability. The equal-area criterion is used to rapidly determine the critical clearing conditions and evaluate how variations in SCR and system parameters affect the large-disturbance stability margin. Finally, simulation studies are conducted to validate the theoretical analysis. The results confirm that the identified stability characteristics provide valuable insights for parameter tuning and optimal design of GFM-DFIG systems.

Key words

wind power / control system analysis / doubly-fed induction generator / stability / grid-forming / small-disturbance stability / large-disturbance stability

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Yan Xiangwu, Zhang Shurui, Cai Guang, Ren Haoyang, Li Ruibo, Jia Jiaoxin. STABILITY ANALYSIS OF GRID-FORMING DOUBLY-FED INDUCTION GENERATOR[J]. Acta Energiae Solaris Sinica. 2025, 46(10): 561-569 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0899

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