Northwest China is rich in solar energy resources, with dry climate, less rainfall and long direct sunlight. However, frequent sand and dust weather has brought great trouble to solar power generation.

各種問題可見，分布式屋頂項目，污染源多面廣，分布分散，污染種類繁多。

Various problems can be seen. Distributed roof projects have a wide range of pollution sources, scattered distribution and various types of pollution.

積灰污染對光伏發(fā)電的影響很大。

Ash pollution has a great impact on photovoltaic power generation.

塵埃污染分類

Dust pollution classification

1.天然粉塵

1. Natural dust

沙塵，灰塵等

Sand, dust, etc

分布式光伏發(fā)電

Distributed photovoltaic power generation

2.油性粉塵。

2. Oily dust.

常見于化工廠和機械加工廠。

It is common in chemical plants and mechanical processing plants.

3.金屬粉塵。

3. Metal dust.

長時間積聚難以清除自然粉塵，常見于鋼廠、機械加工。

It is difficult to remove natural dust accumulated for a long time, which is common in steel mills and machining.

4.有機物粉塵。

4. Organic dust.

長時間積難以清洗，組件玻璃表面形成腐蝕，常見于木材廠、紡織廠、鳥類棲息地。

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

5.礦物粉塵。

5. Mineral dust.

附著力低，與雨水和自然粉塵混合會增加清潔難度，常見于石材廠和水泥廠，長期堆積與雨水混合會產(chǎn)生板結(jié)和鈣化。酸或堿性物質(zhì)的存在會腐蝕組件框架和組件玻璃。

Low adhesion, mixing with rainwater and natural dust will increase the difficulty of cleaning, which is common in stone plants and cement plants. Long-term accumulation and mixing with rainwater will cause hardening and calcification. The presence of acid or alkaline substances will corrode the component frame and component glass.

灰塵污染的影響

Impact of dust pollution

1.透光率降低，零件積灰會遮擋陽光，導(dǎo)致零件電池片接收到的太陽輻射能量降低。

1. The light transmittance is reduced, and the part dust will block the sun, resulting in the reduction of the solar radiation energy received by the part battery.

2.反射率上升，酸性或堿性積灰會引起組件玻璃的腐蝕，即使被腐蝕的玻璃沒有灰塵遮擋，也會引起部分太陽輻射腐蝕后的凹槽反射。

2. The increase of reflectivity, acid or alkaline ash deposition will cause the corrosion of component glass. Even if the corroded glass is not covered by dust, it will also cause the reflection of some grooves after solar radiation corrosion.

3.積灰?guī)б鸬臒岚咝?yīng)使局部玻璃溫度升高。同時，積灰?guī)е械碾s質(zhì)和鈉鹽在高溫下會損壞涂層，形成不可恢復(fù)的彩虹帶。即使積灰?guī)П粵_洗干凈，該區(qū)域的光透射率也會下降。

3. The hot spot effect caused by the ash deposition zone causes the local glass temperature to rise. At the same time, impurities and sodium salts in the ash deposit zone will damage the coating at high temperature, forming an unrecoverable rainbow zone. Even if the ash deposit zone is washed clean, the light transmittance of this area will also decrease.

4.積灰?guī)?dǎo)致下緣玻璃表面電阻降低，分布式光伏發(fā)電從玻璃表面到鋁框的漏電流增大，下端電池片PID衰減高。

4. The ash deposition zone causes the lower glass surface resistance to decrease, the leakage current from the glass surface to the aluminum frame of distributed photovoltaic power generation increases, and the PID attenuation of the lower cell is high.