TIAN Yuan,WANG Keyou,XU Jin,et al.Construction and Online Fast Update Method for Transient Stability Boundary in Parameter Space of Power System[J].Automation of Electric Power Systems,2021,45(9):89-97.
TIAN Yuan,WANG Keyou,XU Jin,et al.Construction and Online Fast Update Method for Transient Stability Boundary in Parameter Space of Power System[J].Automation of Electric Power Systems,2021,45(9):89-97. DOI: 10.7500/AEPS20200429002.
Construction and Online Fast Update Method for Transient Stability Boundary in Parameter Space of Power System
To adapt to online transient stability analysis and control
this paper proposes a construction and fast update method of transient stability boundary (TSB) in the parameter space of the power system. For the given critical fault and the network topology before and after the given fault
the mapping relationship between the critical clearing time and the power system parameters is constructed based on the horizontally scalable broad learning system. In order to improve the prediction accuracy near the actual fault clearing time threshold
the critical error is corrected by constructing a quadratic scaling factor. Combined with the predefined fault clearing time threshold
the corresponding transient stability boundary is determined
and the stability margin of the current system is evaluated. Finally
on the basis of ensuring the accuracy of transient stability assessment
an online fast update strategy without retraining the entire network is proposed by using the incremental learning method. Through the simulation analysis of the IEEE 39-bus test system and an actual system of China southern power grid
it is found that the constructed model can accurately assess the transient stability of the system and has good generalization performance. Meanwhile
the fast update strategy can greatly reduce the model update time while ensuring the accuracy of the prediction
which provides support for the online transient stability assessment.
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references
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