Photovoltaic array fault diagnosis method based on linear judgment analysis and support vector machine

Abstract

The invention relates to a photovoltaic array working state analysis and fault diagnosis method based on linear judgment analysis. The method comprises the following steps: step S1, generating photovoltaic array simulation data and colleting a plurality of electric feature parameters and environment parameters of the maximum power point of a photovoltaic generation array in daily work, thereby obtaining a feature parameter testing sample matrix; step S2, performing linear judgement analysis on a feature parameter standard matrix to obtain a projection matrix, and multiplying the standard matrix with the projection matrix to obtain a standard classification matrix; step S3, serving the standard classification matrix as a training set, and training a classification model through a support vector machine; step S4, multiplying the testing sample matrix with the projection matrix to obtain a new sample matrix; and step S5, classifying the new sample matrix obtained in the step S4 by using the classification model obtained in the step S3, and identifying the class of the data. Through the method disclosed by the invention, the accurate diagnosis on the fault can be realized by performinglinear judgment analysis and classification on the daily running data of the photovoltaic system.

Description

technical field [0001] The invention relates to the technical field of photovoltaic array fault diagnosis in a grid-connected photovoltaic power generation system, in particular to a method for analyzing the working state of a photovoltaic array and fault diagnosis based on linear discriminant analysis. Background technique [0002] Renewable energy is a key challenge that is attracting increasing attention around the world. As a substitute for traditional fossil fuels, solar energy has the advantages of cleanness, sustainability, safety, environmental friendliness, and zero carbon dioxide emissions. In addition, photovoltaic energy is one of the most economically competitive renewable energy sources, which increases national energy security by reducing dependence on fossil fuels. [0003] Although photovoltaic power generation technology has made great progress in recent years, in actual use, there are still many problems that affect the operating efficiency of photovoltaic...

AI Technical Summary

Problems solved by technology

At present, there is no combination of LDA and SVM in the analysis and fault diagnosis of photovoltaic arrays in the published literature and patents.

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