Full-automatic cleaning system and cleaning method of photovoltaic module

Abstract

The invention provides a full-automatic cleaning system and a cleaning method of a photovoltaic module. The full-automatic cleaning system comprises a shuttle bus, a robot, a self-adaptive module, anelectronic label module, a cleaning control module and an automatic grabbing module; the electronic label module is used for collecting position coordinate of every line and every row of photovoltaicstring of a photovoltaic power station, and uploading to the cleaning control module; the cleaning control module judges if the photovoltaic string is required to clean through every branch current inevery junction box in the photovoltaic array and comparing with the reference current; if it requires, sending the position information of the photovoltaic string to the shuttle bus through the cleaning control module; grabbing the cleaning robot through the automatic grabbing module after the shuttle bus confirms the robot location through the self-adaptive module, and sending the robot to the photovoltaic string position required to clean according to the position information sent by the cleaning control module.

Description

technical field [0001] The invention relates to a cleaning system, in particular to a photovoltaic module automatic cleaning system and a cleaning method. Background technique [0002] The natural environment of large-scale ground photovoltaic power station construction areas in China is harsh, and the cleaning and maintenance methods are backward. The actual output power of photovoltaic systems is seriously affected by dust and fouling, especially in the main photovoltaic construction areas in Northwest China; therefore, the problem of dust disposal of photovoltaic modules needs to be solved urgently . At present, photovoltaic modules mainly adopt four methods: manual dry cleaning, manual water washing, engineering vehicle cleaning, and cleaning robot cleaning: [0003] (1) Defects and deficiencies in manual dry cleaning components [0004] 1. Implementation: In the process of manual dry cleaning, there will be problems such as labor-intensive and construction difficultie...

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Problems solved by technology

[0005] 2. In terms of cleaning effect: due to the generally large area of ​​the photovoltaic factory area, it is difficult for workers to control the cleanliness of the components during the cleaning process. Different operators have different forces and different pressures on the components, which will cause excessive deformation of the components and cause battery chips Cracks, another disadvantage is that the effect of dry-cleaning components is not good, often due to too much dust on the mop, there are some traces on the surface of the components, resulting in large areas of shadows

[0006] 3. In terms of cost: cleaning workers use long-handled velvet mop and special detergent for cleaning. The working cycle of dry cleaning is about 3 days / 10MW, and the cost is about 12,000-13,000 yuan / 10MW / time, which is relatively high.

[0007] (2) Defects and deficiencies in artificial water washing components

In many photovoltaic factories in the northwest and mountainous areas, there is a shortage of water sources, so it cannot be used on a large scale

[0009] 2. In terms of cleaning effect: when the water pressure is too high on the photovoltaic module, it will cause the cells to crack, and we cannot control the change of the water pressure of the operator's nozzle during the process, because the higher the water pressure, the better the cleaning speed and effect

Another disadvantage is that the components dry by themselves after washing, and water stains will form on the surface of the components, which is a miniature shadow block compared to the components

[0010] 3. In terms of cost: the cost of water washing is about 0.2 yuan / m^2, which is similar to the price of manual dry cleaning, but two people are required to operate at the same time, one person drives, and one person sprays water to clean the components

[0011] (3) Defects and deficiencies in engineering vehicle cleaning

[0015] (4) Defects and deficiencies in the cleaning of cleaning robots

[0018] 3. In terms of cost: because the existing cleaning robot can only run horizontally along the single row of modules due to the influence of the running track, due to the topography of the photovoltaic factory area, it is impossible to guarantee that the horizontal distance of the single row of modules is too long, and the single row distance of ordinary power stations is about 200 meters. , the longest running distance of the cleaning robot itself is about 2 kilometers, which leads to the inability to make full use of the cleaning ability of the cleaning robot, resulting in a great waste of cleaning robots in use, and the overall number of photovoltaic factories is huge, so the initial investment is relatively large

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