Offshore photovoltaic steel structure processing precautions

The following are some considerations for offshore photovoltaic steel structure processing:

Steel selection: Select steel with good corrosion resistance, such as weathering steel, to cope with the high humidity and high salinity environment at sea.

Design optimization: carry out detailed structural design, considering the complex environmental conditions at sea, such as typhoons, waves, etc., to ensure the stability and reliability of the structure. The large-span photovoltaic support scheme can be used, which can reduce the total amount of steel and the number of piles and the cost of piling. At the same time, it should be noted that steel piles have better bending and cracking resistance than concrete pipe piles, and are more adaptable in the current market environment.

Welding quality: strictly control the welding process, select the appropriate welding methods and parameters to ensure the quality of the weld. For important welds, non-destructive testing, such as ultrasonic inspection, X-ray inspection, etc., is carried out to detect the defects inside the weld.

Anticorrosion treatment: According to the characteristics of the Marine environment, effective anticorrosion measures are taken, such as coating anticorrosion (such as using a coating with good cross-linking density, shielding, chemical resistance and weather resistance), hot dip zinc anticorrosion or composite anticorrosion method. The galvanized and graphene composite coating technology used in some projects is a better protection scheme, and the protection life can be more than 25 years. Stainless steel brackets can also be considered, but the cost is relatively high.

Structural durability: Solve the problems caused by high temperature, high humidity and high salt spray, meet the PID resistance, ensure the stability of moisture and heat resistance, salt spray corrosion performance and bonding force, to withstand the harsh Marine environment during the 25-year operation period.

Dimensional accuracy: accurately control the processing size to ensure that the accuracy of the steel structure meets the design requirements and avoid affecting the subsequent installation and use.

Component connection: Determine the failure mechanism and failure mode of bolt holes and connectors to ensure solid and reliable connection and prevent loosening or damage in the Marine environment.

Fatigue failure: In-depth study of the fatigue failure mechanism of offshore photovoltaic support structures, and take corresponding measures to improve the anti-fatigue performance of the structure.

Convenience of construction and operation and maintenance: Considering the difficulty of installation and operation and maintenance in far offshore areas, if the steel cable flexible bracket is used, it is necessary to pay attention to the problem of long-term easy relaxation to ensure the safety of operation and maintenance.

Electrical equipment selection: The inverter, box transformer and other electrical equipment should be able to monitor the temperature at the terminal in real time, and in the event of a fault, the AC and DC sides can be quickly and automatically disconnected to cope with the risk of over-temperature fire caused by loose wiring and virtual connection caused by the complexity of the water surface scene.

Data acquisition and analysis: The use of corrosion resistance, waterproof and other high requirements of data acquisition equipment, fully data cleaning and pre-processing, mining the value of data, to meet the requirements of unmanned offshore photovoltaic, visualization, intelligent.

Quality inspection: carry out all aspects of quality inspection in the processing process, including appearance inspection, dimensional accuracy detection, etc., to find and deal with problems in a timely manner.

Safety management: Strengthen the safety management of the processing site, formulate safe operation procedures, and ensure the safety of personnel during the construction process.

Environmental monitoring: Pay attention to changes in the Marine environment, such as waves, tides, etc., in order to timely adjust construction and operation and maintenance strategies.

Project management: reasonably arrange the processing schedule, ensure the timely completion of the project, and do a good job in communication and coordination with other relevant parties