With the arrival of midsummer, the temperature in various places has also begun to gradually rise. In hot summer, not only people will suffer from heat stroke, but many photovoltaic power plants will also have "hot" accidents.
In July this year, a photovoltaic power station on the roof of a company in Suizhou City, Hubei Province caught fire. After receiving the alarm, the local fire department rushed to the scene to deal with the danger.
When firefighters arrived at the scene, they found that the solar panels on the roof of the company were on fire, and the fire area was about 4 square meters. The on-site commander arranged for firefighters to put out the fire. After 31 minutes of rescue, the fire was successfully extinguished, which maximized the safety of the owner's life and property.
Such photovoltaic fire accidents occur all over the world, and we have to prevent them. So, for our distributed photovoltaic power station owners, how can we prevent the photovoltaic power station from catching fire due to the high temperature in summer? Today, let's briefly discuss it~
1. Regularly check the ventilation of the photovoltaic power station to ensure good heat dissipation. Generally speaking, when the photovoltaic power station is designed, the bracket is usually raised to ensure that there is enough space in the front, rear, left and right of the module to ensure the circulation of air and achieve the purpose of cooling. Therefore, owners should pay attention to the accumulation of inflammables and other sundries in the place where the photovoltaic modules are installed to avoid poor ventilation.
2. Check the heat dissipation of the inverter. Generally speaking, various components in the inverter are prone to high temperature during the operation, resulting in a high overall working environment temperature. Therefore, owners should regularly check whether the inverter fan, dust filter, etc. are normal, and keep it outdoors. When the temperature exceeds 30 degrees, do a good job of ventilation of the inverter to ensure air convection.
3. Regularly check photovoltaic modules. Whether there is a hot spot problem, whether there are cracks, pollutant blocking, etc., find the problem and deal with it in time, and replace the photovoltaic module if necessary. Special attention should be paid to the problem of hot spots, which may cause spontaneous combustion of photovoltaic modules.
4. Regularly check the working environment of the power station. Remove roof waste in time, such as module packaging debris, flammable materials left by employees, etc. At the same time, check the combustible foreign objects involved in the bottom of the module due to air cyclones, such as plastic bags, balloon fragments, etc.
Finally, I would like to share with you a little knowledge: although the amount of light and radiation is large in summer, the power generation is not necessarily large. The power generation of photovoltaic power plants may not be as high as that in spring or autumn when it is sunny.
Many friends may think that the high solar radiation intensity in summer and the long illumination time will usher in a peak in the power generation of photovoltaic power plants.
In fact, this is not the case. The long-term high temperature in summer has a relatively large impact on the components. When the temperature increases, the output power of photovoltaic modules will decrease. Generally speaking, after reaching a certain peak, the higher the temperature, the lower the power generation of photovoltaic modules. In theory, the power generation will decrease by about 0.44% for every degree of temperature increase.
What's more, in addition to affecting the power generation, the continuous high temperature may also cause equipment downtime and high temperature equipment fire.