A power system transient stability prediction method based onSCSC-Swin Transformer
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TM712;TN929.5

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    Abstract:

    In modern power systems, instability modes have become increasingly diversified following disturbances, necessitating the accurate identification of various instability modes to implement appropriate control measures and prevent significant losses. Therefore, a transi-ent stability assessment method for power systems based on an improved Swin Transformer is proposed in this paper. Firstly, time-domain simulations are conducted to collect voltage magnitude and phase angle characteristics following disturbances, which are used to construct a feature matrix. Then, building upon the Swin Transformer, a spatial cross-scale convolutional attention module is introduced to replace the original multi-head self-attention module. This new module utilizes a series of convolutional layers with dif-ferent kernel sizes to effectively extract features across multiple dimensions, leading to more accurate prediction results. Finally, simula-tion experiments on the modified New England 10-machine 39-bus system and IEEE 50-machine 145-bus system show prediction ac-curacies of 99.05% and 99.00%, respectively, with multi-swing instability misjudgment rates of 0.35% and 0.27%. These results demonstrate that the proposed method not only accurately predicts different instability modes but also exhibits superior robustness in the presence of noise and missing PMU features.

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History
  • Received:August 22,2024
  • Revised:November 05,2024
  • Adopted:November 06,2024
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