Equivalent modeling method for photovoltaic cell

A photovoltaic cell and equivalent modeling technology, applied in the field of effective modeling, can solve problems such as complex calculations and low model accuracy, and achieve the effects of avoiding iterative calculations, easy calculations, and avoiding complex

CN111611710AInactive Publication Date: 2020-09-01SHANGHAI DIANJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-09-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an equivalent modeling method for a photovoltaic cell. The equivalent modeling method comprises the following steps: acquiring an open-circuit voltage Uoc, a short-circuit current Isc, a maximum power point voltage Um and a maximum power point current Im of the photovoltaic cell in a standard state; and calculating an output volt-ampere characteristic model of the photovoltaic cell. The model disclosed by the invention can be used for designing a photovoltaic system, and the model disclosed by the invention is used in a design modeling process, so that the input and output characteristics of a photovoltaic unit can be accurately simulated, and complex iterative operation can be avoided, and the model can be used for rapid prototyping design of the photovoltaic system.
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Description

technical field

[0001] The invention relates to the field of photovoltaics, in particular to a photovoltaic cell equivalent modeling method. Background technique

[0002] With the increasing awareness of environmental protection, photovoltaic power generation systems have been more and more widely used. Photovoltaic power generation systems are usually small in scale and are used in changing installation environments and application scenarios. Photovoltaic systems usually require flexible design, and it is difficult to adopt a general modular design.

[0003] In designing a photovoltaic system, an important step is to obtain an accurate mathematical model of the photovoltaic power generation unit. However, in different regions, the temperature and light intensity are different, and the models provided by manufacturers are usually difficult to cover all working conditions. For this, parametric models need to be used in the simulation design process.

[0004] In the prior a...

Examples

Embodiment Construction

[0032] Below, according to the accompanying drawings, preferred embodiments of the present invention are given and described in detail, so that the functions and features of the present invention can be better understood.

[0033] Embodiments of the present invention include a photovoltaic cell equivalent modeling method, the model used in the method is as figure 1 shown. In this model, I sh Is the photogenerated current, and its value is proportional to the area of ​​the photovoltaic cell and the intensity of the incident light; I D is the current flowing through the equivalent diode; I is the load current output by the photovoltaic cell; U D Is the terminal voltage of the equivalent diode. Under the condition of no light, the basic behavior of the photovoltaic cell is similar to that of an ordinary diode; U is the voltage at both ends of the load; R L is the load resistance of the battery; R S is the equivalent series resistance; R sh is the equivalent parallel resistan...