In order to resist the invasion of natural disasters, it is necessary to control the four links of site selection, design, installation, and post-operation and maintenance of photovoltaic power plants.
1. Site selection: ensure the quality of the building and comprehensively consider the elements of the installation point In recent years, with the emergence of lightweight materials, the danger of these building materials being blown away by the wind should also be considered in the design to prevent the roof from being torn by the airflow. At present, household distributed photovoltaic power plants are mainly installed on sloped roofs and flat roofs. Flat roofs also cover concrete flat roofs, color steel plate flat roofs, steel structure flat roofs, ball joint roofs, etc. The installation location of the photovoltaic power station is also particular. It is necessary to consider the installation location, installation orientation, installation angle, load requirements, arrangement and spacing. From this point of view, the safety of the site selection of photovoltaic power plants is mainly the following three aspects, one is load-bearing. To reach 38KG/square meter; the second is life. The life of the roof is greater than the design life of photovoltaics. The third is to try to avoid the tuyere and water outlet.
2. Design: Improve module strength and design suitable windshields From the perspective of power station design, while weighing the cost of photovoltaic power stations and power generation revenue, it can moderately increase the strength design requirements of photovoltaic brackets, module briquetting blocks, etc. Reasonable selection has better Component inclination for wind resistance. In addition, you can also consider designing a suitable windshield. The windshield is fixedly installed on the rear column of the bracket system, and there are several diversion openings on the board, which have the functions of diverting the wind and reducing the wind pressure of the components. The force on the beam of the support system is reduced, the pull-out force on the foundation is reduced, and the structural safety factor of the photovoltaic power station is improved. However, the force on the rear column increases, and the axial shear force on the foundation increases, so it is necessary to check the force on the foundation. When designing, fully consider the strength of photovoltaic brackets, components and build appropriate windshields, which can effectively reduce the damage of strong winds to photovoltaic power plants.
3. Installation: Choose a strong bracket and install it scientifically and rationally. The wind resistance of photovoltaic power plants is mostly determined by the strength of the photovoltaic bracket. The brackets are generally made of aluminum alloy, carbon steel and stainless steel. In theory, the maximum wind resistance of the photovoltaic support is 216km/h, and the maximum wind resistance of the tracking support is 150km/h (greater than 13 winds). In addition: When installing, it is best to install fixed stay wires and apply anti-rust paint to prolong the time for the bracket to withstand storms.
4. Operation and maintenance: intelligent and efficient operation and maintenance to improve risk awareness During the operation and maintenance of photovoltaic power plants during normal operation, for roof power plants, buildings should be inspected regularly to ensure the quality of the buildings on which photovoltaic projects are based. Check the strength of photovoltaic modules, photovoltaic supports, and the structure of the inverter room at any time, so as to prevent the passing of time.