Extreme weather such as heavy rain, heavy snow, strong wind, hail, etc. will cause serious damage risks to photovoltaic brackets, affecting the normal operation and safety of photovoltaic power generation systems. Therefore, it is crucial to take effective safety protection measures.
Strong winds are a type of extreme weather that poses a greater threat to photovoltaic brackets. To cope with strong winds, the wind resistance of the bracket must first be improved during the design phase. According to local meteorological data, the design wind speed is determined, and the bracket structure is designed in accordance with relevant standards to ensure that it can withstand the wind pressure at a specific wind speed. For example, to increase the stability of the bracket, use stable structures such as triangles, and reasonably set diagonal braces and cables. At the same time, the connection between the bracket and the foundation should be strengthened, and high-strength bolts and anchoring devices should be used to prevent the bracket from being blown down or displaced under the action of strong winds.
Heavy rain and heavy snow will cause photovoltaic brackets to bear additional loads. For heavy rain, drainage measures should be taken, and the drainage slope should be considered when designing the bracket to avoid corrosion and additional pressure on the bracket caused by accumulated water. For heavy snow, the maximum snow load that the bracket can withstand should be calculated based on the local snow thickness. The load-bearing capacity of the bracket can be increased, such as by using thicker steel or optimizing the structural form, to ensure that the bracket will not be damaged due to overload in the case of snow accumulation. In addition, a snow load monitoring device can be installed to monitor the weight of snow in real time, and take snow removal measures in time when it exceeds the set value.
Hail may damage the photovoltaic bracket and photovoltaic modules. In hail-prone areas, protective nets or protective plates can be installed on the photovoltaic bracket to reduce the direct impact of hail on the bracket and modules. At the same time, choose bracket materials with high impact resistance, such as high-strength aluminum alloy or specially treated steel, to improve the bracket's ability to resist hail. In addition, regularly check the protective coating on the surface of the bracket, and repair it in time if it is damaged, to prevent the bracket from rusting and corroding after the hail damages the coating.
High and low temperatures will affect the performance of photovoltaic bracket materials. In high temperature environments, high-temperature resistant materials and connecting parts should be selected to prevent the material from softening or deforming. At the same time, do a good job of heat dissipation design for the bracket to avoid reducing the strength of the bracket due to excessive temperature. In low temperature environment, the low temperature brittleness of the material should be considered, and steel with good low temperature performance should be selected to prevent the bracket from brittle fracture at low temperature. In addition, the connection parts of the bracket are specially treated, such as wrapping with heat shrink sleeves or insulation materials to reduce the impact of temperature changes on the tightness of the connection.
Establish a comprehensive monitoring system to monitor the operating status of the photovoltaic bracket in real time, including parameters such as deformation and stress change of the bracket. The data is transmitted to the monitoring center through sensors, and an early warning signal is issued in time once an abnormal situation is found. At the same time, a complete emergency plan is formulated to clarify various response measures before and after extreme weather occurs, such as organizing personnel to conduct on-site inspections, timely repair of damaged parts, and isolation of areas where safety hazards may exist.
The safety protection of photovoltaic brackets in extreme weather is a systematic project, which requires comprehensive measures from multiple aspects such as design, material selection, installation, monitoring and emergency treatment. Only in this way can the photovoltaic bracket be ensured to maintain stable and reliable operation under various extreme weather conditions and ensure the safety and efficient power generation of photovoltaic power generation systems.
