Singular Perturbation and Complex Torque Analyses of Doubly Fed Induction Generator With Additional Inertia Control

Qi Guo; Jiawei Yu; Hongsheng Xu; Meng Zhan; Min Cheng

doi:10.1049/ein2.70001

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Singular Perturbation and Complex Torque Analyses of Doubly Fed Induction Generator With Additional Inertia Control

更新时间：2026-03-24

- Singular Perturbation and Complex Torque Analyses of Doubly Fed Induction Generator With Additional Inertia Control
- Singular Perturbation and Complex Torque Analyses of Doubly Fed Induction Generator With Additional Inertia Control
- Energy Internet 2025年2卷第2期
- 作者机构：
  
  1. State Key Laboratory of HVDC (Electric Power Research Institute, Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System, CSG Key Laboratory for Power System Simulation (Electric Power Research Institute, China Southern Power Grid), National Energy Power Grid Technology R&D Centre, China Southern Power Grid),Guangzhou,China
  2. Contribution: Visualization, Supervision
  3. Contribution: Validation, Data curation
  4. State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,Wuhan,China
  5. Contribution: Investigation, Methodology, Software, Formal analysis
  6. Yunnan Power Grid,Kunming,China
  7. Contribution: Validation, Supervision
- 作者简介：
- 基金信息：
- DOI：10.1049/ein2.70001
  中图分类号：
- 纸质出版：2025
- 稿件说明：
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Qi Guo, Jiawei Yu, Hongsheng Xu, 等. Singular Perturbation and Complex Torque Analyses of Doubly Fed Induction Generator With Additional Inertia Control[J]. Energy Internet, 2025,2(2).

Qi Guo, Jiawei Yu, Hongsheng Xu, et al. Singular Perturbation and Complex Torque Analyses of Doubly Fed Induction Generator With Additional Inertia Control[J]. Energy Internet, 2025, 2(2).
Qi Guo, Jiawei Yu, Hongsheng Xu, 等. Singular Perturbation and Complex Torque Analyses of Doubly Fed Induction Generator With Additional Inertia Control[J]. Energy Internet, 2025,2(2). DOI： 10.1049/ein2.70001.

Qi Guo, Jiawei Yu, Hongsheng Xu, et al. Singular Perturbation and Complex Torque Analyses of Doubly Fed Induction Generator With Additional Inertia Control[J]. Energy Internet, 2025, 2(2). DOI： 10.1049/ein2.70001.

摘要

Abstract

The doubly fed induction generator (DFIG) shows multi-time-scale and strong nonlinearity

making its stability analysis difficult. This paper conducts small perturbation stability analysis for the single-DFIG infinite-bus system with additional inertia control (AIC). First

the full-order electromagnetic transient model is constructed based on its topology and control structure. Then

the original model is reduced by using the singular perturbation method

and the validity of the simplified sixth-order model is verified by simulation. After linearising the sixth-order model based on the root locus and frequency response diagrams

it is found that increasing the gain coefficient Kf of the AIC could improve the inertia response characteristics but weaken the system's small disturbance stability. Furthermore

a complex torque model is constructed

which reveals that the system's negative damping originates from the terminal voltage control loop. Moreover

as Kf increases

the inherent damping continuously decreases

leading to further deterioration of the negative damping. As Tf increases

the stability of the system initially weakens and then strengthens. This study could help understand the DFIG grid-tied system dynamics.

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