Method of calculating hot spot temperature of micro-defect solar cell module

Abstract

The invention discloses a method of calculating the hot spot temperature of a micro-defect solar cell module, which includes the following steps: selecting a micro-defect cell, dividing the micro defects into point defects, line defects and surface defects, and assembling the cell in a module; covering the micro-defect cell at different proportions to generate a hot spot effect; and calculating the temperature of the micro-defect cell. By using the method, the hot spot temperature of a photovoltaic module can be calculated and predicted quickly, time can be saved, modules can be maintained and repaired in time, and ultimately, the economic benefits can be increased.

Description

technical field [0001] The invention relates to a method for calculating the temperature of a hot spot of a micro-defect solar cell component, belonging to the technical field of photovoltaic components. Background technique [0002] With the continuous development and innovation of photovoltaic power plants, the development of photovoltaics at home and abroad has received a lot of attention, including photovoltaic companies and scientific researchers. Photovoltaic modules use solar energy to generate electricity, so most of them work outdoors. The outdoor conditions are relatively harsh. On the one hand, such as bird droppings and tree leaves, these occlusions will cause partial failure of the components. The most prominent manifestation is the phenomenon of hot spots. This effect causes the temperature of the component to rise, and if it is not treated in time, the component will be burned, causing serious consequences. On the other hand, during the use of components outd...

AI Technical Summary

Problems solved by technology

Photovoltaic modules use solar energy to generate electricity, so most of them work outdoors. The outdoor conditions are relatively harsh. On the one hand, such as bird droppings and tree leaves, these occlusions will cause partial failure of the components. The most prominent manifestation is the hot spot phenomenon. This effect causes the temperature of the component to rise, and if it is not handled in time, the component will be burned, causing serious consequences

On the other hand, during the use of components outdoors, due to external forces and other factors, some defects, such as cracks, will occur in the components.

The generation of defects will cause the performance mismatch of the cells in the module, which will cause the cells to generate reverse bias voltage when working outdoors, consume power, and cause hot spot effect

[0003] At present, according to the definition of the standard IEC61215, many researchers have studied the mismatch between the parameters of the cells in the module and the shadow occlusion in terms of the photovoltaic hot spot effect, and have not related to the influence of the joint effect of the two on the hot spot Research

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