Power grid node importance calculation method based on network embedding and support vector

Abstract

The invention proposes a power grid node importance calculation method based on network embedding and support vector, wherein firstly, the grid simulation software is used for simulating failure consequences of each node in various operating modes of a to-be-evaluated power grid; an electrical quantity feature is extracted from the simulation data, and the TADW algorithm is used for extracting thecomplete feature of the node; a node failure consequence label is determined based on the studied power grid preference; and then, the sample data are used for training a SVR model. In the training process, the cross-validation method is used for selecting the SVR model hyperparameters; the tree model-based method is used for feature selection. The power grid node importance calculation method based on network embedding and support vector in the invention can effectively evaluate the node importance according to the information learned from the training samples, and can more effectively adaptto the particularity of different power grids compared with the traditional index-based evaluation method.

Description

Technical field [0001] The invention belongs to the field of power systems, and specifically is a method for calculating the importance of grid nodes. Background technique [0002] In recent years, some major blackouts worldwide have highlighted the importance of protecting key nodes in the power system. Studies have shown that most power grids meet the “small-world characteristics” and have robustness in the face of random attacks and vulnerability to deliberate attacks. In a specific operation mode, only a few key nodes in the power grid will fail. Very serious consequences. Therefore, how to identify such nodes and conduct key defenses under severe weather and other scenarios is not only a requirement for power grid security, but also a need for differentiated management of power grids in accordance with economic principles. [0003] When the parameters of power grid entities such as generators, transformers and lines are known, the fault transient simulation of grid nodes can...

AI Technical Summary

Problems solved by technology

[0004] The calculation method based on the index is convenient to calculate, but because the scale and structure of the power grid vary widely, it is difficult to make a unified definition of the node importance for the huge "set" of the power network, so the method based on the index inevitably has some emphasis and subjectivity

For example, the Internet sorting algorithm pays more attention to the connection r

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