Spectral Clustering Cluster Partition Method for High Penetration Distributed Energy Systems

Abstract

The invention provides a spectral clustering cluster dividing method for a high-permeability distributed energy system for the problem that follow-up voltage regulation cannot be conveniently carriedout on the high-permeability large-scale distributed energy system due to the fact that an existing high-permeability large-scale distributed energy system is still at the exploratory stage in the aspects of cluster dividing evidence and dividing method. The method comprises the steps of constructing a weight matrix and a degree matrix through an electric distance among N nodes; calculating normalized Laplacian matrixes L (Laplacian) by using the weight matrix and the degree matrix and carrying out dimension reduction; gathering the matrixes L subjected to data dimension reduction into n subcommunities by adopting a K-means algorithm and determining one node in each subcommunity to be a clustering centroid of the subcommunity; and constructing a fitness function and determining the final subcommunity division results of the N nodes and the clustering centroid of each subcommunity according to the fitness function. According to the spectral clustering cluster dividing method, the problem of overvoltage of high-permeability renewable energy can be effectively solved and the spectral clustering cluster dividing method has good instantaneity.

Description

technical field [0001] The present invention relates to the technical field related to power system operation optimization, in particular to a spectrum clustering cluster division method for a high-permeability distributed energy system. Background technique [0002] The cluster system formed by the grid connection of new energy sources such as wind power and photovoltaics has the characteristics of multi-capacity, high density, and large-scale, and can be divided into regional decentralized / centralized and different access forms. The large-scale access of distributed generation (DG) is prone to adverse effects such as voltage overrun, power reverse, and line overload, and will gradually transform the traditional radial distribution network into an active distribution network. Among them, the voltage limit is the most obvious problem, and the method of relying on the on-load voltage regulator of the substation and the local reactive power compensation needs to be improved. ...

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Problems solved by technology

[0005] The present invention aims at the problem that the existing high-permeability large-scale distributed energy system is still in the exploratory stage in terms of the cluster division basis and division method, and it is not convenient to carry out subsequent voltage regulation for the high-permeability large-scale distributed energy system, and provides a Spectral Clustering Cluster Partition Method for High Penetration Distributed Energy Systems

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