Urban low-voltage partitioning method based on spectral clustering algorithm

A spectral clustering algorithm and low-voltage technology, applied in the field of power systems, can solve problems such as backward theoretical methods and single low-voltage partition forms

Inactive Publication Date: 2015-09-30
NANCHANG UNIV
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Problems solved by technology

The invention solves the problem that the form of the low-voltage partition is relatively single and the theoretical method is backward in the cur

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  • Urban low-voltage partitioning method based on spectral clustering algorithm
  • Urban low-voltage partitioning method based on spectral clustering algorithm
  • Urban low-voltage partitioning method based on spectral clustering algorithm

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Embodiment Construction

[0057] The steps of a kind of urban low-voltage zoning method based on spectral clustering described in the present invention are as follows:

[0058] (1). Obtain multi-factor data of the power grid to construct a sample space; (2). Establish a Laplacian matrix, and automatically determine the number of low-voltage control zones by the Laplacian matrix eigenvalue difference; (3). Laplacian The first 2 and 3 eigenvectors of the Sri Lanka matrix are mapped to 2-dimensional and 3-dimensional spaces, and the governance partitions are intuitively divided; (4). Construct an evaluation function to evaluate the effect of low-voltage partitions; (5). Use the k-means algorithm to analyze the eigenvectors Carry out clustering, draw the zoning pedigree diagram, and obtain a well-defined low-voltage zoning management plan.

[0059] The first step is to obtain multi-factor data of the power grid and construct a sample space;

[0060] In order to comprehensively and reasonably evaluate the ...

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Abstract

An urban low-voltage partitioning method based on a spectral clustering algorithm specifically comprises steps as follows: (1) acquiring multi-factor data of a power grid and constructing a sample space; (2) constructing a Laplacian matrix and automatically determining the number of low-voltage governance subareas according to a Laplacian matrix eigenvalue difference; (3) mapping first two eigenvectors and first three eigenvectors of the Laplacian matrix to two-dimensional and three-dimensional spaces, and partitioning governance subareas directly; (4) constructing an evaluation function and evaluating the low-voltage partitioning effect; (5) clustering the eigenvectors with a k-means algorithm and drawing up a subarea dendrogram to obtain a low-voltage subarea governance scheme with clear hierarchy. The low-voltage governance partitioning method considers four indexes, namely, the lowest voltage amplitude, the number of involved low-voltage households, the voltage lower limit crossing time and the annual power supply, analyzes the low-voltage state of a distribution network comprehensively, and can provide a decision basis for power grid workers and improve the low-voltage governance efficiency.

Description

technical field [0001] The invention belongs to the field of electric power systems, and in particular relates to a low-voltage partition method for an urban power distribution network. Background technique [0002] With the in-depth development of the construction of a new socialist countryside, the further implementation of the policy of sending home appliances to the countryside, and the continuous improvement of my country's urbanization level, urban and rural residents have gradually increased their requirements for power supply quality. However, due to historical reasons, the construction of my country's power distribution system is relatively backward compared with the power generation and transmission system, resulting in prominent problems such as low voltage and low reliability of power supply in rural distribution networks, among which the problem of low voltage in distribution networks is the most serious and the most harmful. [0003] Reasonable division of gove...

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Application Information

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IPC IPC(8): G06Q50/06G06F17/30
Inventor 张忠会刘故帅谢义苗
Owner NANCHANG UNIV
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