In daily life, dust is everywhere. Houses, walls, furniture, clothes, and the skin on hands and faces, as long as you can think of it, will be patronized by dust. Rural photovoltaic power plants have been placed outdoors and are exposed to wind and rain, and dust is naturally indispensable. It is an indisputable fact that photovoltaic power plants are easily affected by dust, but most people do not know how much dust affects them.
In fact, the harm of dust to photovoltaic power plants mainly has three aspects.
The first aspect is to block the components and affect the power generation. Let's first look at the principle of photovoltaic power generation. Photovoltaic power generation is a technology that directly converts light energy into electrical energy by using the photovoltaic effect of the semiconductor interface. The main component of this technology is the solar cell. If the surface is covered with dust, the light transmittance of the front cover glass will decrease. The decrease in light transmittance will lead to a decrease in the output performance of the battery. The greater the deposition concentration, the lower the light transmittance. The lower the amount of radiation absorbed by the panel, the greater the reduction in its output performance, resulting in a reduction in the power generation of the photovoltaic power station.
Second, the hot spot effect is formed. First of all, let’s talk about the hot spot effect of the module. Under certain conditions, a covered solar cell module in a series branch will be used as a load to consume the energy generated by other illuminated solar cell modules. At this time, it will heat up, which is the hot spot effect. Such a hot spot effect will burn out the modules over time, reducing the overall life of the photovoltaic power station.
The third aspect is to cause component corrosion. The dust adsorbed on the photovoltaic modules is mostly acidic and alkaline, and the dust has strong adsorption. After a period of time, the surface of the photovoltaic panel is gradually corroded and damaged under the erosion of the acidic or alkaline environment, making the surface pitted. The optical performance of the photovoltaic panel is attenuated, the efficiency is reduced, the power generation is reduced, and the life of the module is shortened.