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A Modeling Method for Abnormal Aging Faults of Photovoltaic Modules

A technology of photovoltaic modules and modeling methods, which is applied in design optimization/simulation, calculation, computer-aided design, etc., can solve problems such as unclear array research and difficulty in photovoltaic research, and achieve shortened test time, reduced experimental funds, and reduced labor costs. cost effect

Active Publication Date: 2020-11-03
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0002] Due to the long service life of photovoltaic modules, there are many factors affecting their aging. At present, the research on abnormal aging of photovoltaic modules mainly stays in the laboratory to obtain corresponding characteristic parameters through accelerated aging methods. The research on aging mainly stays in the aspects of components, while aging The research of components on strings and arrays is not yet clear, and it is difficult to study the actual impact of abnormally aging photovoltaic components on strings and arrays

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  • A Modeling Method for Abnormal Aging Faults of Photovoltaic Modules
  • A Modeling Method for Abnormal Aging Faults of Photovoltaic Modules
  • A Modeling Method for Abnormal Aging Faults of Photovoltaic Modules

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Embodiment Construction

[0054] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0055] Such as figure 1 The flow chart of the present invention shown, the modeling method of the abnormal aging fault of the photovoltaic module of the present invention is characterized in that it includes the following steps:

[0056] Step A: Obtain the main characteristic data of the photovoltaic module nameplate;

[0057] Step B: According to solar cell 5 parameters (5 parameters refer to photogenerated current I ph , reverse saturation current I o , equivalent series resistance R s , equivalent parallel resistance R sh , ideality factor n) Mathematical and physical model to establish a photovoltaic module simulation model;

[0058] Step C: Establishing an array simulation model according to the component simulation model.

[0059] The ...

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Abstract

The present invention discloses a modeling method for an abnormal aging fault of a photovoltaic component. The modeling method comprises the following steps: firstly constructing a photovoltaic component model according to a 5-parameter mathematical physics model of a solar cell; establishing a photovoltaic string model based on an M file in the MATLAB according to the photovoltaic component model, simulating the specific influence of the abnormal aging component on the string, and drawing an I-V characteristic curve; and according to the photovoltaic string, constructing a photovoltaic array simulation model to simulate the influence of the abnormal aging component on the entire column. Beneficial effects of the method disclosed by the present invention are that the influence of the abnormal aging component on the entire photovoltaic string and the photovoltaic array can be studied by establishing a photovoltaic array simulation model, particularly a photovoltaic array model with an abnormal aging component, and more intuitive understanding can be brought about, so that convenience is brought to guide the practical experiments, and necessary help is provided to the fault diagnosis method by using the photovoltaic array characteristic curve.

Description

technical field [0001] The invention relates to a modeling method for abnormal aging faults of photovoltaic components, belonging to the technical field of photovoltaic power generation. Background technique [0002] Due to the long service life of photovoltaic modules, there are many factors affecting their aging. At present, the research on abnormal aging of photovoltaic modules mainly stays in the laboratory to obtain the corresponding characteristic parameters through accelerated aging methods. The research of components on strings and arrays is not yet clear, and it is difficult to study the actual impact of photovoltaic abnormal aging components on strings and arrays. Establishing a mathematical and physical simulation model that can reflect the effects of abnormally aging components on the string and its entire photovoltaic array can greatly reduce research time and costs, and plays an important role in advancing theoretical research. Contents of the invention [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/04
CPCG06F30/20G06F2119/04Y02E60/00
Inventor 丁坤丁汉祥王越高列李元良陈富东
Owner HOHAI UNIV CHANGZHOU
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