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光伏组件的灰尘会对发电造成什么影响

发布时间:2022-06-07 01:01:01
发布者:AB模板网
浏览次数:90

夏季炎热,是光伏发电的最佳时间,但部分并网电站发电效率较低。凌渡智云运维人员检查后发现,原因是光伏组件表面长期没有清洗干净。一层厚厚的灰尘;导致发电效率低。

光伏组件玻璃上的污染是迅速影响光伏电站的主要问题之一,会降低发电效率。

目前光伏电站多采用硅基太阳能电池组件,对温度非常敏感。随着组件表面灰尘的堆积,会增加光伏组件的传热热阻,成为光伏组件上的绝缘层,影响其散热。

研究表明,太阳能电池温度每升高1°C,输出功率就会降低约0.5%。此外,当电池模组长时间暴露在阳光下时,被覆盖的部分比未被覆盖的部分升温快得多,温度过高时会产生烧焦的黑点。


屋顶光伏解决方案.jpg

在正常光照条件下,面板的阴影部分会从一个发电单元变成一个用电单元,阴影部分的光伏电池会变成一个不发电的负载电阻,消耗所连接电池产生的电能,即即,产生热量。热点效应。

这个过程会加剧电池板的老化,降低输出,严重时会导致元器件烧坏。

灰尘附着在太阳能电池板的表面,也会阻挡、吸收和反射光线,其中最重要的就是对光线的阻挡。灰尘颗粒对光的反射、吸收和遮蔽影响光伏板对光的吸收,从而影响光伏发电的效率。

研究表明,灰尘沉积在面板组件的受光面上,首先会降低面板表面的透光率;其次,一些光线的入射角会发生变化,导致光线在玻璃罩内传播不均匀。研究表明,在相同条件下,清洁太阳能电池板组件的输出功率至少比污垢组件高5%,并且污垢量越高,组件输出性能下降幅度越大。

凌渡智云拥有专业的运维人员,可以科学、准确地选择最佳清洁方案,从而避免发电效率损失,有效提高电站收益。


Hot summer is the best time for photovoltaic power generation, but some grid connected power stations have low power generation efficiency. The operation and maintenance personnel of lingdu Zhiyun found that the reason was that the surface of PV modules had not been cleaned for a long time. A thick layer of dust; Resulting in low power generation efficiency.


Pollution on the glass of photovoltaic modules is one of the main problems that rapidly affect photovoltaic power plants, which will reduce the power generation efficiency.


At present, most photovoltaic power stations use silicon-based solar cell modules, which are very sensitive to temperature. With the accumulation of dust on the surface of the module, the heat transfer and thermal resistance of the PV module will be increased, which will become the insulating layer on the PV module and affect its heat dissipation.


The research shows that the output power will be reduced by about 0.5% when the temperature of the solar cell increases by 1 ° C. In addition, when the battery mold is exposed to the sun for a long time, the covered part heats up much faster than the uncovered part. When the temperature is too high, it will produce scorched black spots.


Under normal lighting conditions, the shaded part of the panel will change from a power generation unit to a power consumption unit, and the photovoltaic cell in the shaded part will become a load resistor that does not generate power, consuming the electric energy generated by the connected battery, that is, generating heat. Hot spot effect.


This process will aggravate the aging of the battery board, reduce the output, and cause the components to burn out in serious cases.


Dust attached to the surface of solar panels will also block, absorb and reflect light, the most important of which is the blocking of light. The reflection, absorption and shielding of light by dust particles affect the absorption of light by photovoltaic panels, thus affecting the efficiency of photovoltaic power generation.


The results show that the dust deposited on the light receiving surface of the panel assembly will first reduce the light transmittance of the panel surface; Secondly, the incident angle of some light will change, resulting in uneven propagation of light in the glass cover. The results show that under the same conditions, the output power of clean solar panel module is at least 5% higher than that of fouling module, and the higher the amount of fouling, the greater the decline of module output performance.


Lingdu Zhiyun has professional operation and maintenance personnel, who can scientifically and accurately select the best cleaning scheme, so as to avoid the loss of power generation efficiency and effectively improve the income of the power station.