Method for work state analysis and fault diagnosis of photovoltaic array based on principal component analysis

A principal component analysis, photovoltaic array technology, applied in the fields of instruments, character and pattern recognition, computer parts, etc., can solve problems such as the working state analysis and fault diagnosis of photovoltaic arrays that have not yet been known by the principal component analysis method.

CN109117865AInactive Publication Date: 2019-01-01FUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for analyzing working state and diagnose fault of photovoltaic array based on principal component analysis includes generating simulation data of photovoltaic array, collecting electric characteristic parameter and environment parameter of maximum power point of photovoltaic array in daily work, and obtaining characteristic parameter test sample matrix. Secondly, the standard matrix of eigenparameters is analyzed by principal component analysis to obtain the projection matrix, and the standard matrix is multiplied by the projection matrix to obtain the standard principal component matrix. Then the standard principal component matrix is normalized and used as training set to train classification model by support vector machine. Then multiplying the characteristic parameter test sample matrix by the projection matrix to obtain the sample principal component matrix and normalizing it. Finally, the normalized sample principal component matrix is classified by the classification model to identify the classification of the data. The invention can accurately diagnose the fault by analyzing and classifying the principal component of the daily operation data of the photovoltaic system.
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Description

technical field

[0001] The invention relates to the technical field of grid-connected photovoltaic power generation system working state analysis and photovoltaic array fault diagnosis, in particular to a method for realizing photovoltaic array working state analysis and fault diagnosis based on principal component analysis. Background technique

[0002] In recent years, as global environmental and energy issues have become increasingly prominent, people's awareness of environmental protection and reducing the use of fossil fuels has also gradually strengthened. Photovoltaic energy applications have become a major new energy field in the world because of their easy access and pollution-free highlights. Photovoltaic cells are developing rapidly driven by the development of the global photovoltaic industry, and are widely used in large-scale photovoltaic power plants, communications, railways, transportation and other fields. In addition, due to the gradual reduction in the c...

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0056] It should be pointed out that the following detailed description is exemplary and 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.

[0057] 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 combinatio...