Impact of Dead-Time on Resonance in Doubly Fed Induction Generator Under Weak Grid

Zakiud Din; Jianzhong Zhang; Zheng Xu; Yaqian Zhang; Yipeng Song

doi:10.17775/CSEEJPES.2021.00760

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Impact of Dead-Time on Resonance in Doubly Fed Induction Generator Under Weak Grid

更新时间：2026-02-06

- Impact of Dead-Time on Resonance in Doubly Fed Induction Generator Under Weak Grid
- CSEE Journal of Power and Energy Systems Vol. 11, Issue 3, Pages: 1070-1079(2025)
- 作者机构：
  
  1. School of Electrical Engineering, Southeast University,Nanjing,China
  2. Siemens Gamesa Renewable Energy A/S, Brande,Denmark
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2021.00760
  CLC：
- Published：2025
- 稿件说明：
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Zakiud Din, Jianzhong Zhang, Zheng Xu, et al. Impact of Dead-Time on Resonance in Doubly Fed Induction Generator Under Weak Grid[J]. CSEE Journal of Power and Energy Systems, 2025, 11(3): 1070-1079.
DOI：

Zakiud Din, Jianzhong Zhang, Zheng Xu, et al. Impact of Dead-Time on Resonance in Doubly Fed Induction Generator Under Weak Grid[J]. CSEE Journal of Power and Energy Systems, 2025, 11(3): 1070-1079. DOI： 10.17775/CSEEJPES.2021.00760.

摘要

Abstract

Subsynchronous resonance (SSR) and high-frequency resonance (HFR) are two phenomena that exist in a doubly fed induction generator (DFIG) system operated in a weak grid. Besides the aforementioned resonance

dead-time in the converter (rotor side converter (RSC) and grid side converter (GSC)) of the DFIG system can cause resonance at middle frequencies. The aforementioned resonance at middle frequencies can greatly degrade dynamic performance and cause instabilities in the DFIG system. Nevertheless

there is not enough research available in existing literature on resonance in the DFIG system

considering dead-time impact. This paper proposes a new method of resonance analysis in a DFIG system

taking dead-time effect into consideration and utilizing small-signal impedance modeling. Dead-time of the RSC and GSC will introduce distorted voltage into the rotor-and stator-side of the DFIG. Then

rotor-side impedance is modified by adding the effect of transfer function (impedance) from the distorted voltage to rotor current. Likewise

the stator-side impedance is modified by adding the effect of the transfer function (impedance) from distorted voltage to stator current. Thus

overall DFIG system impedance

as seen from the point of common coupling is changed. Finally

resonance is revealed by plotting the DFIG system impedance and weak grid impedance on the Bode plot. Additionally

resonance mitigation is impedance on the Bode plot. Additionally

resonance mitigation is exposed through the dead-time compensation (DTC) technique using an adaptive second-order bandpass filter. With the proposed technique

the resonance at middle frequencies is damped with zero probability of resonance reoccurrence. Finally

the validity and the accuracy of the proposed DTC techniques are validated using mathematical analysis and simulations in Matlab.

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