ZHU Zhilong,QIN Wenping,SONG Zining,et al.Transient stability assessment of DFIG grid-connected power system based on two-level attention fusion[J].Electric Power Automation Equipment,2025,45(09):79-87.
ZHU Zhilong,QIN Wenping,SONG Zining,et al.Transient stability assessment of DFIG grid-connected power system based on two-level attention fusion[J].Electric Power Automation Equipment,2025,45(09):79-87. DOI: 10.16081/j.epae.202507007.
Transient stability assessment of DFIG grid-connected power system based on two-level attention fusion
Aiming at the problems of insufficient mining of dynamic spatiotemporal features and inability to take the characteristics of data at different scales into account in the transient stability assessment(TSA) of large-scale doubly fed induction generator(DFIG) grid-connected power system,a TSA method based on two-level attention fusion(AF) is proposed. In order to accurately simulate the transient stability dynamic response of DFIG grid-connected power system and take both simulation accuracy and speed into account,a hybrid electromechanical-electromagnetic transient simulation model of DFIG grid-connected system is established. In order to fully explore the transient stability features,a feature fusion method based on probability weight factor is proposed. A two-level AF model based on Transformer encoder is proposed to achieve the fusion of spatiotemporal features of transient stability data and the sharing and fusion of weight values among feature channels of data with different transient scales. The simulative results of IEEE 10-machine 39-bus system show that the evaluation effect of the proposed model is superior to other commonly used deep learning algorithms and it has good interpretability.
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