Clean error correcting method of solar module and solar module system using same

Abstract

The invention provides a clean error correcting method of a solar module. The method comprises the following steps of an abnormity determining step, on the condition that all assemblies of a solar module system normally operates, sunshine percentage is sufficient and output voltage of the solar module is lower than rated voltage, determining occurrence of generating power reduction caused by external factors and reduction of to-be-calculated power generating power based on the power generating power; a solar module generating power selecting step, namely selecting the generating power of the solar module in a range above 40% of the rated generating power as the to-be-calculated generating power; a solar module interval generating power loss step, namely calculating interval generating power loss of the solar module by means of the to-be-calculated generating power; a generating power loss cost converting step; a total generating power loss cost calculating step; and a cleaning time point determining step.

Description

technical field [0001] The invention relates to an error correction method for solar module cleaning. In particular, it relates to an error correction method capable of providing high-precision judgment of the cleaning time point of the solar module. Background technique [0002] In recent years, countries around the world are actively developing alternative energy sources, such as solar energy, wind energy, geothermal energy, hydropower and other related natural energy sources, to replace fossil fuels. Among them, the most attention is solar power generation. Since solar power generation has the advantages of being inexhaustible and easy to integrate with buildings, and coupled with the rapid development of semiconductor materials in recent years, the photoelectric conversion efficiency of solar energy has continued to increase, so solar cell modules have gradually been widely used by consumers. [0003] However, environmental factors have a great influence on the power g...

AI Technical Summary

Problems solved by technology

However, when all components are in normal operation, the power loss of the solar module is still caused by many external factors besides dust accumulation, such as frosting or shadowing on the panel of the solar module due to temperature and climate. , will affect the power generation efficiency of the solar cell module

Since the above-mentioned external factors will lead to a decrease in the power generation of the solar module, when judging the cleaning time of the solar module, if the power loss caused by factors other than dirt or dust cannot be ruled out, it is to judge the power generation When the loss occurs, the cleaning time point is determined based on the generated power results including the above-mentioned factors such as frosting or shadow shading, which will lead to errors in the output results of the cleaning time point, so that the user can use it when the solar module panel is not very dirty. The cleaning operation has been carried out, and the result will still lead to an increase in cleaning costs, so it still cannot fully meet the economic benefits

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