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Harmonic source coupling parameter identification method adopting linear relation clustering

A technology of coupling parameters and identification methods, applied in character and pattern recognition, output power conversion devices, instruments, etc., can solve problems such as difficulty, large identification parameters of harmonic mechanism models, and weak adaptability to changes in harmonic user operating scenarios. , to achieve the effect of improving computational efficiency and convergence speed, practical segmentation modeling, and strong adaptability

Inactive Publication Date: 2019-08-23
FUZHOU UNIV
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Problems solved by technology

[0003] Since the current online power quality monitoring system has the ability to monitor the statistical values ​​of harmonic voltage and harmonic current, but does not have synchronous measurement methods, it is difficult to identify parameters based on the harmonic mechanism model, and the results are often difficult for harmonic users. Weak adaptability to running scene changes

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  • Harmonic source coupling parameter identification method adopting linear relation clustering
  • Harmonic source coupling parameter identification method adopting linear relation clustering
  • Harmonic source coupling parameter identification method adopting linear relation clustering

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0047] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0048]It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinat...

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Abstract

The invention relates to a harmonic source coupling parameter identification method adopting linear relation clustering, and the method comprises the following steps: S1, carrying out the per-unit processing of harmonic voltage and harmonic current data according to the short-circuit capacity of a system and reference voltage, and carrying out the dimension reduction of the per-unit data through employing PCA; s2, determining a clustering number according to the sum of squares of the errors; s3, searching an initial clustering center by adopting a particle swarm evolution algorithm; s4, inputting the clustering number and the initial clustering center intoa K- means clustering algorithm to carry out clustering, and identifying the linear coupling parameters of the harmonic source. According to the method, the time-varying volt-ampere characteristic of the harmonic source can be accurately reflected from the harmonic monitoring data, and the adaptability to the operation scene change of a harmonic user is stronger, so that the parameter identification of the harmonic source is more practical.

Description

technical field [0001] The invention relates to the technical field of harmonic source parameter identification, in particular to a harmonic source coupling parameter identification method using linear relationship clustering. Background technique [0002] A large number of power electronic devices and other types of nonlinear loads are increasing, and harmonic pollution is becoming more and more serious; harmonics in the power grid will cause many problems in the grid connection of new energy generation, such as parallel resonance causing system harmonic voltage and harmonic current Too high and harmonic oscillation lead to grid connection instability or even failure. With the large-scale access of distributed new energy generation, higher requirements are put forward for the harmonic suppression of the power grid. Identifying the interference user parameters is the premise of locating the harmonic source and seeking the optimal operation strategy combined with local contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06N3/00H02M1/14
CPCG06N3/006H02M1/14G06F18/23213G06F18/2135
Inventor 邵振国许昊铂张嫣陈飞雄张承圣
Owner FUZHOU UNIV
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