In the construction of photovoltaic power stations in the southeast, special attention should be paid to the impact of typhoons and other bad weather, and targeted measures should be taken in the design, later operation and maintenance of the power stations. So in the typhoon season, photovoltaic power station how to do a good job of protection?
1. From the perspective of pv power station preliminary design, what special points should be paid attention to for centralized power station and distributed power station respectively?
(1) Ensure the photovoltaic project depends on the quality of the building
Any building in the design must consider the safety factor, the past building materials and parts are often heavy, the design of the main consideration of the ability to support and earthquake risk prevention. In recent years, with the emergence of lightweight materials, the design should also consider the risk of these building materials being blown away by the wind, to prevent the roof from being torn by the airflow.
(2) Improve the quality of photovoltaic modules and supports
From the perspective of component materials, the selection of component backplate, frame material and encapsulated glass can be considered for some special climatic environment areas, so as to improve the impact resistance, seismic resistance and other performance of components, and thus improve the ability to withstand special conditions. In terms of power station design, while weighing the cost and income of photovoltaic power station, the intensity design requirements of photovoltaic supports and module blocks can be moderately improved, and the inclination Angle of modules with better wind resistance ability can be reasonably selected.
The wind resistance ability of photovoltaic power station is largely determined by photovoltaic scaffolds. Photovoltaic bracket is a special bracket designed for placing, installing and fixing photovoltaic modules in photovoltaic power generation system. General materials are aluminum alloy, carbon steel and stainless steel. Theoretically, the maximum wind resistance capacity of photovoltaic stent is 216 km/h, and the maximum wind resistance of tracking stent is 150 km/h (greater than wind force of level 13).
To withstand typhoons, it is necessary to have strong photovoltaic supports. Therefore, the foundation and support of photovoltaic power station must be strengthened, and the frame strength of modules should be ensured. This requires targeted site design, strict control of product quality, reasonable calculation of wind pressure, snow pressure, etc.
In addition, according to the geology and structure of the project site, the site selection of the power station should avoid frequent natural disasters such as typhoons and tornadoes.
According to local conditions, the wind and seismic resistance parameters of coastal buildings are strictly consulted for design, and galvanized supports with strong pressure resistance are selected. The array layout of photovoltaic system should give full consideration to wind resistance tuyere.
(3) Improve pv design and installation quality
Choose reliable design and construction party, strictly control the construction quality, lay a good foundation, strictly control the quality of components, brackets, inverters and other products, reasonable calculation of wind pressure, snow pressure and so on, prevent corners from being cut.
There is no big difference between centralized power station and distributed power station, the key is to do the above points well.
2. Especially the distributed photovoltaic construction in residential areas, how to consider the impact of typhoons in the early design to reduce risks and losses?
The counterweight of household photovoltaic system is usually cement foundation. The cement foundation should fully consider the load of buildings, and meet the requirements of wind and snow resistance. Generally, the design will be conducted according to the local wind pressure once in 50 years, and there are strict requirements on the weight of cement foundation and concrete strength.
3. From the perspective of the operation and maintenance of the power station in the later stage, what kind of protection should be done for the photovoltaic power station in the season of typhoon?
In the later operation and maintenance process, the roof power station should regularly check the quality of the building to ensure the quality of the building on which the photovoltaic project depends. Check the strength of pv modules and pv supports, and the structure of inverter room at any time, so as to prevent defects gradually.
Meanwhile, for photovoltaic enterprises, they should improve their risk management awareness, purchase diversified photovoltaic insurance, and correctly understand the role and value of insurance. While taking advantage of insurance to transfer some risks in the industry, effective quality management, operation and maintenance measures are adopted to reduce risks in the industry.
4. In terms of distributed photovoltaic, how should power station owners deal with typhoon?
For distributed pv, before the typhoon comes, the quality of the building supported by the pv project should be carefully checked, and the strength of pv modules, pv supports and other components should be checked. In addition, insurance can be purchased appropriately.
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