How do photovoltaic power stations deal with high temperature weather?

On August 5, the Central Meteorological Observatory continued to issue an orange high temperature warning. According to data from China Weather Network, southern my country is experiencing a round of fierce high temperature and hot weather. Large-scale high temperature weather in the south will continue, with the core area remaining in the Jiangsu, Zhejiang and Shanghai areas.

With strong sunlight and high temperatures, will the power generation efficiency of photovoltaic power stations that use solar energy to generate electricity also increase?

The answer is no. Under normal circumstances, the ideal operating temperature of photovoltaic power generation components is about 25℃. For every 1℃ increase in temperature, the output power will decrease by about 0.35%, and the power generation of photovoltaic power stations will also decrease by about 0.35%. That is, after the temperature exceeds 25℃, the higher the temperature, the lower the output power, and the power generation will also decrease accordingly.

In addition to photovoltaic components, the high temperature caused by the weather will also cause the efficiency of inverters and other electrical components to decrease. Generally, the operating temperature range of civilian-grade electronic components is -35℃～70℃, and the operating temperature of most photovoltaic inverters is -30～60℃. Improper installation or heat dissipation will force the inverter and electrical components to start  derating operation or even shut down for maintenance, resulting in power generation loss.

Due to the influence of weathering and ultraviolet radiation, electrical components installed outdoors will also age quickly.

To ensure that photovoltaic modules have good power generation in hot weather, the first thing is to maintain air circulation for modules, inverters, distribution boxes and other equipment. Avoid excessive number of modules blocking each other, which will affect the ventilation and heat dissipation of the photovoltaic array.

At the same time, ensure that the area around photovoltaic modules, inverters, distribution boxes and other equipment is open and free of debris to avoid affecting the heat dissipation of the power station. If there are debris piled up next to the equipment that blocks or oppresses the power station, it must be removed in time.

When installing a photovoltaic power station, the inverter and distribution box are installed in a shaded and rainproof place. If there is no shelter in the actual environment, they can be equipped with a canopy to avoid direct sunlight, which will cause the equipment temperature to be too high, affecting the power generation and equipment life. At the same time, a cooling fan can be installed on the equipment.

In order to ensure the safety of photovoltaic power stations and avoid equipment failures and possible disasters caused by high temperatures, regular inspections of photovoltaic power stations are also essential.

It is necessary to pay attention to the temperature difference problem that causes hidden cracks in components when cleaning components in high temperatures in summer. It is necessary to avoid high temperature periods and clean them in the early morning or evening when the temperature is lower.