Simplified modeling and parameter extraction method for double-diode model of photovoltaic module

A technology of photovoltaic modules and double diodes, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as inability to obtain directly, and difficulty in solving model parameters.

Pending Publication Date: 2020-07-03
HOHAI UNIV CHANGZHOU
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Problems solved by technology

However, because the dual diode model contains seven unknown parameters, and none of them can be directly obtained from the nameplate parameters of the photovoltaic module, it is difficult to solve the model parameters

Method used

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  • Simplified modeling and parameter extraction method for double-diode model of photovoltaic module
  • Simplified modeling and parameter extraction method for double-diode model of photovoltaic module
  • Simplified modeling and parameter extraction method for double-diode model of photovoltaic module

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Embodiment Construction

[0047] 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.

[0048] A simplified photovoltaic module double diode model modeling and parameter extraction method of the present invention comprises the following steps:

[0049] 1) Establish the dual diode model of the photovoltaic module by the output characteristic equation of the dual diode equivalent circuit of the solar cell sheet, the output characteristic equation of the dual diode equivalent circuit of the solar cell sheet is:

[0050]

[0051] where: V cell , I cell is the output voltage and current of the solar cell; I ph_cell is the photogenerated current of the solar cell; I 01_cell , I 02_cell is the reverse saturation current of two diodes in the double diode equivalent circuit of the solar cell; n 1_cell , n2_cell Indicates the ideality ...

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Abstract

The invention discloses a simplified photovoltaic module double-diode model modeling and parameter extraction method which is characterized by comprising the following steps: 1) establishing a double-diode model of a photovoltaic module according to an output characteristic equation of a double-diode equivalent circuit of a solar cell; 2) simplifying seven parameters in the double-diode model of the photovoltaic module into four parameters to obtain a simplified model; 3) solving parameters of the simplified model through nameplate parameters provided by a manufacturer to obtain an output characteristic curve of the component under a standard test condition; and 4) extrapolating the output characteristic curve of the photovoltaic module under the standard test condition to any irradiance according to the environmental parameters. By adopting the method, the problems of difficulty in solving parameters of a double-diode model of a traditional photovoltaic module and difficulty in solving all model parameters from nameplate parameters provided by a manufacturer are solved, and the output characteristics of the photovoltaic module in different environments are accurately described.

Description

technical field [0001] The invention relates to the field of solar photovoltaic power generation, in particular to a simplified double diode model of a photovoltaic module. Background technique [0002] A large number of scholars have proposed mathematical models of photovoltaic modules to describe their electrical characteristics, including: single-diode model, double-diode model, etc., where the double-diode model is based on the single-diode model. The diode with compound loss makes the double diode model better characterize the output characteristics of photovoltaic modules in low-irradiation environment than the single diode, and the accuracy is higher. However, because the dual diode model contains seven unknown parameters, none of which can be directly obtained from the nameplate parameters of photovoltaic modules, it is difficult to solve the model parameters. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the invention discloses a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/367
Inventor 张经炜吴佳兵丁坤陈曦晖
Owner HOHAI UNIV CHANGZHOU
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