Online detecting device for surface ash deposition degree of photovoltaic module and cleaning method for surface of photovoltaic module

Abstract

The invention discloses an online detecting device for the surface ash deposition degree of a photovoltaic module in the photovoltaic field. The online detecting device comprises an illumination intensity sensor arranged on the top surface of a casing, wherein the casing is connected with the photovoltaic module; an input interface, an output interface, an anode interface and a cathode interface are formed in the side face of the casing; the input interface is connected with an anode of a previous photovoltaic module of a to-be-detected photovoltaic module; the output interface is connected with a cathode of a next photovoltaic module of the to-be-detected photovoltaic module; the anode interface is connected with an anode of the to-be-detected photovoltaic module; the cathode interface is connected with a cathode of the to-be-detected photovoltaic module; a detection control system is arranged in the casing. According to the online detecting device disclosed by the invention, actual environment component power of the photovoltaic module and ash deposition time are subjected to curve fitting, a relational function between photovoltaic module gain and interval cleaning time is calculated out, and finally optimal cleaning interval time is calculated out; the online detecting device can be used for cleaning the photovoltaic module.

Description

technical field [0001] The invention relates to a photovoltaic module, in particular to a method for cleaning a photovoltaic module. Background technique [0002] With the decrease of global fossil energy reserves, in order to deal with possible energy security issues in the future and reduce the adverse impact of the use of fossil energy on the natural environment, the country has proposed renewable energy such as wind power, photovoltaics, and biomass energy as the core. sustainable development strategy. [0003] With the rapid growth of photovoltaic power generation installed capacity in recent years, the importance of post-operation and maintenance of photovoltaic power plants has become increasingly prominent, and cleaning the dust on the surface of photovoltaic modules is an essential daily maintenance work. The accumulation of dust on the surface of photovoltaic modules will not only reduce the power generation, but also cause hot spot effect in severe cases, resulti...

AI Technical Summary

Problems solved by technology

Because this kind of method involves more equipment and complicated operation process, it is difficult to realize unattended and remote early warning, which is not conducive to large-scale promotion

In addition, the performance change of the cleaning component as a reference unit due to self-attenuation, unintentional damage, etc. will easily cause the prediction deviation of the whole system

[0012] To sum up, although the existing detection system and its algorithm can scientifically determine the cleaning strategy to a certain extent, there are still many areas to be improved in terms of accuracy, cheapness and promotion cost.

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