In order to resist natural disasters, it is necessary to control the site selection, design, installation and post-operation and maintenance of photovoltaic power plants.
I. Site selection: ensuring the quality of the building
In recent years, with the advent of lightweight materials, the risk of these building materials being blown away by the wind is also considered in design, preventing the roof from being torn by the airflow. At present, household distributed photovoltaic power plants are mainly installed on inclined roofs and flat roofs. The flat roof covers concrete flat roof, color steel flat roof, steel flat roof, ball joint roof and so on.
For the installation of photovoltaic power plants, there are also some considerations, including the installation location, installation orientation, installation angle, load requirements, and 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 bearing. To reach 38KG / square meter; second is the life. The life of the roof is greater than the design life of the photovoltaic. The third is not to be in danger. Try to avoid the tuyere and the nozzle.
Second, the design: improve the strength of the solar mounting structure component, design the appropriate windshield
From the perspective of power station design, while weighing the cost of photovoltaic power station and power generation benefit, the strength design requirements of solar mounting bracket and component clamps can be appropriately increased, and the inclination of components with better wind resistance can be reasonably selected. In addition, consider designing a suitable windshield. The wind deflector is fixedly mounted on the rear pillar of the bracket system, and the panel is provided with a plurality of air guiding ports, which have the functions of guiding the flow and reducing the wind pressure of the assembly. The beam of the bracket system is reduced in force, the pulling force of the foundation is reduced, and the safety factor of the photovoltaic power station structure is improved. However, the force on the rear pillar increases, and the axial shear force of the foundation increases. The foundation force is checked. In the design, full consideration of the photovoltaic support, component strength and the construction of a suitable windshield can effectively reduce the damage of strong wind to the photovoltaic power station.
Third, the installation: choose a solid bracket scientific and reasonable installation
Most of the wind power capacity of photovoltaic power plants is determined by the strength of photovoltaic supports. The materials 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 temperature of the tracking support is 150km/h (more than 13 winds). But why is the bracket that claims to be able to withstand the typhoon of the thirteenth class be blown away when it encounters a wind with less than 13 winds?
As shown in the figure, it may be because the installation company installed three rows of PV modules on the flat roof in order to save the steel, and the front and rear rows are not connected to the beam. The weight of the fixed stone pier at the bottom of the bracket is too light, and should be made into a rectangular shape. Pier weight. The above details have not been dealt with well. The typhoon is coming, and it must be flying to heaven! In addition: When installing, pay attention to the best installation of fixed cable and anti-rust paint to extend the time of the bracket against the storm.
Fourth, operation and maintenance: intelligent and efficient operation and maintenance, improve risk awareness
In the operation and maintenance of the PV power plant during normal operation, the building should be inspected regularly for the roof power station to ensure the quality of the building on which the PV project is based. Check the strength of the PV modules, PV racks, and the solar mounting structure of the inverter room at any time to prevent micro-duration.