Transient stability assessment method and system based on power flow vector Minfa-based distance

Abstract

The embodiment of the invention provides a transient stability assessment method and system based on a power flow vector Minkoff base distance. According to the method, on the basis of a transient stability assessment method based on the clustering of the operation conditions, an integrated transient stability assessment method based on a power flow vector Minkoff-based distance is designed by combining a design idea of a current transient stability assessment integrated model. According to the method, the difference of the system transient stability under different working conditions is considered, and a plurality of sub-evaluation models are weighted and integrated according to the similarity of the working conditions, so that the higher the matching degree of the system transient stability is, the larger the influence of the sub-evaluation models on the total evaluation result is. Compared with a single evaluation model, the method has higher generalization, and the evaluation reliability and generalization are improved. In addition, the output of the base model is directly utilized by the integrated model, more information is reserved when the final output is obtained through integration, and the accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of power system information management, in particular to a transient stability evaluation method and system based on the Minkowski distance of a power flow vector. Background technique [0002] The power system transient stability evaluation algorithm based on machine learning methods generally includes several steps of offline training, online evaluation, and rolling update. Offline training generally uses the simulation data of the target power grid, and obtains multiple actual operating conditions (power flow sections) from online measurements. These operating conditions are used as the initial conditions of the simulation, and the expected fault parameters corresponding to the operating conditions are set for simulation. The simulation results are as follows: A large number of simulation results are produced. The simulation results include the time series of system state variables and algebraic variables...

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present invention provides a transient stability evaluation method and equipment based on the power flow vector Minkowski distance, which is used to solve the problem that the current transient stability evaluation integrated model in the prior art cannot consi...

Images