Open Access

ARTICLE

Robustness Evaluation Framework for Wideband Oscillation Mitigation Strategies in DFIG-Based Grid-Connected Systems via Electrical Quantity Response Trajectory Characteristics

Yun Chen¹, Wenjun Du¹, Lisen Wang¹, Rui Xu², Cong Sun^2,*, Hongkang Zhu²
1 Hangzhou Fuyang Power Supply Company, Hangzhou, China
2 Department of Electric Engineering, Northeast Electric Power University, Jilin, China
* Corresponding Author: Cong Sun. Email:
(This article belongs to the Special Issue: Advances in Grid Integration and Electrical Engineering of Wind Energy Systems: Innovations, Challenges, and Applications)

Energy Engineering https://doi.org/10.32604/ee.2026.082274

Received 12 March 2026; Accepted 09 May 2026; Published online 08 June 2026

Abstract

To achieve efficient and stable operation of doubly-fed induction generator (DFIG) grid-connected systems, the adaptability of oscillation suppression strategies across wide-frequency oscillation scenarios is particularly crucial. This adaptability can be scientifically characterized by robustness. This paper proposes a robustness evaluation system for oscillation suppression strategies based on the characteristics of electrical quantity response trajectories. First, wide-frequency oscillation scenarios covering multiple oscillation modes for DFIG-based wind power systems are established. Second, evaluation indicators are defined based on the characteristics of electrical quantity response trajectories, and an evaluation index system is constructed using the active power attenuation rate, steady-state amplitude suppression ratio, and dynamic adjustment time as core metrics. Third, the entropy weight method is employed to comprehensively assess the robustness level of suppression strategies. Finally, case studies under typical operating conditions are conducted to validate the effectiveness and feasibility of the proposed evaluation system. This system not only provides an indicator reference for optimizing the performance of oscillation suppression strategies within target frequency bands and enhancing their applicability across a wide frequency range but also offers a theoretical basis for designing robust suppression strategies with adaptive parameters. It holds significant reference value for improving oscillation analysis and suppression capabilities in power systems with high penetration of renewable energy.

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Keywords

Doubly-fed induction generator (DFIG); wideband oscillation; mitigation strategy; electrical quantity response trajectory characteristics; robustness evaluation framework

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