ZHANG Yuchi,CAI Guowei,LIU Cheng,et al.Transient Stability Assessment of Power System with Renewable Energy Based on Network Energy Trajectory Feature Learning[J].Automation of Electric Power Systems,2025,49(10):20-28.
ZHANG Yuchi,CAI Guowei,LIU Cheng,et al.Transient Stability Assessment of Power System with Renewable Energy Based on Network Energy Trajectory Feature Learning[J].Automation of Electric Power Systems,2025,49(10):20-28. DOI: 10.7500/AEPS20240723007.
Transient Stability Assessment of Power System with Renewable Energy Based on Network Energy Trajectory Feature Learning
Rapid and accurate transient stability assessment is the key to ensure the safe and stable operation of power system. The high proportion of power electronic equipment connected to the power grid leads to the non-smooth system characteristics of multi-control switching after the power system is disturbed
which brings challenges to the accuracy and generalization of the existing transient stability discrimination methods. A transient stability assessment method based on network energy trajectory feature learning is proposed for the grid-connected power systems with renewable energy and DC transmission. First
the transient energy function of power system with renewable energy based on augmented network data is constructed
the mapping relationship between the spatio-temporal distribution characteristics of network energy and transient stability is studied
and the branch vulnerability index and stability discrimination index are proposed. Then
attention weights are guided by branch vulnerability index to enhance key branch features. Using stability assessment function based on network energy and branch phase angle difference as input features
a transient stability assessment model of power system with renewable energy is proposed. Finally
through simulation analysis of New England 10-machine 39-bus system and CEPRI-TAS practical system with 197 buses
the impact of power electronic equipment switching control on stability discrimination methods is analyzed
and the accuracy and effectiveness of the proposed model are verified.
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