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Power distribution network single-phase earth fault line selection method based on feature fusion and clustering

A single-phase ground fault and feature fusion technology, which is applied in the direction of detecting faults, fault locations, and measuring electricity by conductor type, can solve the problems of large amount of feature calculation and low accuracy, and achieves improved efficiency, improved accuracy, and reduced The effect of sample data size

Active Publication Date: 2022-06-24
DATONG POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER
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Problems solved by technology

[0006] The purpose of this application is to solve the problems of low accuracy and large amount of characteristic calculation in the existing single-phase ground fault line selection process

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  • Power distribution network single-phase earth fault line selection method based on feature fusion and clustering
  • Power distribution network single-phase earth fault line selection method based on feature fusion and clustering
  • Power distribution network single-phase earth fault line selection method based on feature fusion and clustering

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Embodiment Construction

[0032] In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features of the embodiments may be combined with each other unless there is conflict.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not subject to the following disclosure. Restrictions to specific embodiments.

[0034] like figure 1 As shown, a single-phase-to-ground fault simulation model of a 5-line 10kV distribution network was established in the simulation software MATLAB / Simulink, and the li...

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Abstract

The invention discloses a power distribution network single-phase earth fault line selection method based on feature fusion and clustering, and the method comprises the steps: 1, extracting a zero-sequence current waveform of each line in a power distribution network based on a set single-phase earth fault condition, and determining a fault feature matrix of each line according to the zero-sequence current waveform; step 2, reconstructing the fault feature matrix of each line, and calculating a correlation coefficient matrix of the reconstructed fault feature matrix; step 3, according to the correlation coefficient matrix and a preset characteristic equation, calculating a characteristic database matrix formed by characteristic values of the correlation coefficient matrix; and 4, performing clustering operation on the principal component feature vectors in the feature database matrix based on a K-means clustering algorithm to obtain a fault clustering center model so as to determine the single-phase earth fault line of the to-be-detected line. Through the technical scheme in the invention, the problems of low accuracy and large characteristic calculation amount in the existing single-phase earth fault line selection process are solved.

Description

technical field [0001] The present application relates to the technical field of power system distribution network protection, and in particular, to a method for selecting a single-phase-to-ground fault line in a distribution network based on feature fusion and clustering. Background technique [0002] The distribution network plays a very important role in the power system. It can obtain electrical energy from substations or local power plants and distribute it to power users step by step. It has the closest relationship with users. However, my country's distribution network has a wide distribution range and relatively low configuration, which is a relatively weak link in the entire large power grid. The distribution network of 6~66kV voltage level in my country widely adopts the neutral point indirect grounding operation mode, that is, the small current grounding operation mode. This method mainly includes: the neutral point ungrounded operation mode and the neutral point ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G06K9/62
CPCG01R31/086G01R31/088G06F18/23213Y04S10/52
Inventor 张晓鹏白洁赵国伟王忠孙乃君李捷力晓伟
Owner DATONG POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER
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