The northwest region has China's richest solar energy resources, with a dry climate, low rainfall, and long periods of direct sunlight. However, frequent sandstorms have brought great trouble to solar power generation.

各种问题可见，分布式屋顶项目，污染源多面广，分布分散，污染种类繁多。

Various problems can be seen, such as distributed roof projects, which have a wide range of pollution sources, scattered distribution, and a wide variety of pollution types.

积灰污染对光伏发电的影响很大。

Ash pollution has a significant impact on photovoltaic power generation.

尘埃污染分类

Dust pollution classification

天然粉尘

Natural dust

沙尘，灰尘等

Sand, dust, etc

分布式光伏发电

Distributed photovoltaic power generation

油性粉尘。

Oily dust.

常见于化工厂和机械加工厂。

Commonly found in chemical and mechanical processing plants.

金属粉尘。

Metal dust.

长时间积聚难以清除自然粉尘，常见于钢厂、机械加工。

Long term accumulation makes it difficult to remove natural dust, which is common in steel mills and mechanical processing.

有机物粉尘。

Organic dust.

长时间积难以清洗，组件玻璃表面形成腐蚀，常见于木材厂、纺织厂、鸟类栖息地。

It is difficult to clean for a long time, and the surface of the component glass forms corrosion, which is common in wood factories, textile factories, and bird habitats.

矿物粉尘。

Mineral dust.

附着力低，与雨水和自然粉尘混合会增加清洁难度，常见于石材厂和水泥厂，长期堆积与雨水混合会产生板结和钙化。酸或碱性物质的存在会腐蚀组件框架和组件玻璃。

Low adhesion, mixing with rainwater and natural dust can increase the difficulty of cleaning, commonly found in stone and cement factories. Long term accumulation and mixing with rainwater can cause hardening and calcification. The presence of acid or alkaline substances can corrode the component frame and component glass.

灰尘污染的影响

The impact of dust pollution

透光率降低，零件积灰会遮挡阳光，导致零件电池片接收到的太阳辐射能量降低。

The transmittance decreases, and the accumulation of dust on the parts can block sunlight, resulting in a decrease in the solar radiation energy received by the battery cells of the parts.

反射率上升，酸性或碱性积灰会引起组件玻璃的腐蚀，即使被腐蚀的玻璃没有灰尘遮挡，也会引起部分太阳辐射腐蚀后的凹槽反射。

The increase in reflectivity and the accumulation of acidic or alkaline dust can cause corrosion of the component glass. Even if the corroded glass is not covered by dust, it can cause reflection of some grooves after solar radiation corrosion.

积灰带引起的热斑效应使局部玻璃温度升高。同时，积灰带中的杂质和钠盐在高温下会损坏涂层，形成不可恢复的彩虹带。即使积灰带被冲洗干净，该区域的光透射率也会下降。

The hot spot effect caused by the ash accumulation zone increases the local glass temperature. At the same time, impurities and sodium salts in the ash accumulation zone can damage the coating at high temperatures, forming an irreversible rainbow band. Even if the ash accumulation zone is washed clean, the light transmittance of the area will decrease.

积灰带导致下缘玻璃表面电阻降低，分布式光伏发电从玻璃表面到铝框的漏电流增大，下端电池片PID衰减高。

The ash accumulation zone leads to a decrease in the surface resistance of the lower edge glass, an increase in the leakage current from the glass surface to the aluminum frame in distributed photovoltaic power generation, and a high PID attenuation of the lower battery cell.

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