Some netizens broke the news: At about 3 pm on May 21, a fire broke out on a barren hill near the town of Luo County, Baoding City. There was a photovoltaic power station near the fire. As the fire continues to spread, white smoke is also emerging beneath the PV modules.

The reporter learned from the relevant departments that the local government had extinguished the mountain fire on the afternoon of the same day. The fire is a waste grass, etc., causing no major economic losses.

Most of the village-level poverty alleviation power stations or ground power stations are built on barren hills, and the summer grasses are dry and flammable. Most of the photovoltaic power plants are electrical equipment. In the event of a fire, the fire is not easily controlled and is likely to cause great property damage.


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How to prevent fire protection in photovoltaic power plants in summer?

1. Establish fire prevention and isolation areas around the power station to prevent external fire sources from entering;

2. Eliminate and control the quantity of combustible materials in the photovoltaic district, and strengthen the weed control management inside and outside the photovoltaic power station, box inverter and cable tray;

3. A certain amount of fire-fighting equipment should be installed around the photovoltaic power station. Relevant personnel should respond quickly to fire-fighting capacity and prevent major losses.

With the arrival of summer, the temperature has gradually increased. Many friends believe that the summer smog weather is relatively small, the solar radiation intensity is high, the daytime illumination time is long, and the photovoltaic power station's power generation will usher in a peak.

Here is a small knowledge to be popularized with you: in the summer, the amount of electricity generated by photovoltaic power plants is likely to be lower than that in spring or autumn.

Because of the long hot weather in summer, the impact on components is relatively large. As the temperature increases, the output power of the photovoltaic module decreases. The peak temperature coefficient of PV modules is about -0.38~0.44%/°C, that is, the temperature rises, the lower the power generation of PV modules, theoretically, the temperature will decrease by 0.44 for every degree of temperature increase. %about.

In addition, in addition to affecting the amount of power generated, the continuous high temperature will cause the equipment to run down and the equipment to ignite at high temperatures. Of course, the probability of such a situation is small, but it does not rule out the unexpected situation.

How to cool the PV power plant in summer?

1. PV modules and inverters should be kept ventilated. Generally speaking, when the photovoltaic power station is designed, it will usually raise the bracket (except for the household roof tile photovoltaic power station), to ensure that there is enough space in front, back, left and right of the components to ensure the circulation of air to achieve the purpose of cooling, and the surrounding parts of the components. The metal frame also has a certain heat dissipation effect.

2. The inverter should be shaded. Most of the PV inverters on the market today are generally IP65 rated, with a certain degree of wind, dust and water resistance.

However, in the summer, the ambient temperature is high, and various components in the inverter are prone to high temperatures during operation, resulting in a decrease in power generation efficiency and even affecting the life of components.

Therefore, some inverters in household photovoltaic systems are equipped with awnings to reduce the temperature of the equipment. In addition, the installation environment of the inverter should be well shaded and ventilated to ensure the convection of the air and also increase the power generation capacity of the power station.

3. Ensure that there are no weeds or obstructions around the power station. Some ground power stations are often surrounded by lush weeds and vegetation due to their remote location, which also affects the flow of air, resulting in excessive temperatures.

In addition, the lush weeds or sundries and the bird manure power station form a occlusion, which leads to a reduction in the power generation capacity of the power station; therefore, it is necessary to timely conduct daily inspections of the power station and timely remove weeds, bird droppings and other coverings.

4. It is forbidden to sprinkle water on the components during the high temperature period. Some power station owners will continue to sprinkle water on the components in the summer to achieve the cooling effect.

Although the components have been cooled to a certain extent, it is not known that there are certain security risks. There is a danger of electric shock if the power station is not protected during grounding during design and installation. In addition, sprinkling water to cool down is equivalent to a "sun rain" that will reduce the amount of electricity generated.

The above are just a few tips to improve fire safety and increase power generation in summer power stations.