Analysis of the latest China Classification Society offshore wind power regulations and specifications

2020-09-18 14:00:07 en-admin 21

Keywords:Offshore wind power; regulations; wind turbines

Liu Renna (Assistant Director of China Classification Society Quality Certification Company) will explain the analysis of China Classification Society offshore wind power regulations and specifications. It is roughly divided into two parts. The first part is offshore wind power regulations and specification system; the second part is our upcoming The specification for offshore power generating crews will be released this year.

Domestic regulatory policy. In 1993, China’s State Council issued Decree No. 109. In 2019, the State Council was revised. The following is part of the interception of the State Council’s Decree. You can pay attention to Article 2. The Regulations he wrote are applicable. Article 3 clearly states that offshore installations are installed or will be installed in the coastal waters of the People’s Republic of China; Article 4 clearly states that China Classification Society can Acting on behalf of statutory inspections; this system framework is divided into four parts, general regulations, ship technical regulations, container technical regulations, etc. Each regulation is divided into technical regulations and management regulations. After waiting for the interpretation of the system framework by the leaders of the Maritime Safety Administration, it can be seen that their scope of offshore facilities is set to include new marine transportation equipment, offshore wind power, and marine ranches. At the same time, they provide technical support for the positioning of the system framework.

Ship technical regulations are formulated by the China Maritime Safety Administration in accordance with national laws and administrative regulations. The requirements of the national mandatory technical and inspection system for ships and offshore installations are divided into technical regulations and management regulations within the framework of this system. Technical regulations mainly provide A technical requirement, this technical requirement is the technical requirement for the entire life cycle of the entire offshore facility, including design, construction, operation and supervision. Management regulations are the basis of a system, including inspection types, inspection scopes, inspection items, and inspection methods. I am here to share with you the definition of offshore installations. Offshore installations, water and underwater fixed installations, and offshore wind measuring towers all belong to the category of offshore installations.

Regarding some of the certification specifications for offshore wind turbines, classification societies entered the field of wind power in 1999 and established certification specifications covering onshore and offshore wind power in 2003. With the development of the wind power industry, they began to formulate certification specifications for offshore wind power in 2009, the first version of offshore wind power certification. The wind power certification specification was officially released in 2012 and started to be implemented in 2013. With the development of national wind power, we have gradually moved towards the far-reaching sea in 2016 and began to do far-reaching scientific research. In 2018, we started the revision of offshore wind power certification. The revision work is basically completed this year and is expected to be officially released before the end of this year.

In this revision of offshore wind turbines, we mainly did the following work, adding relevant requirements for floating wind turbines, dynamic analysis requirements of the transmission chain, adding anti-typhoon requirements, increasing electrical system requirements, increasing blade design and test requirements, and updating Corrosion protection requirements. With the development of wind power gradually moving towards the sea and towards the ultra-distant and far-reaching seas, our country's offshore wind power is especially far-reaching seas. Wind power has the basic function of anti-typhoon. The anti-corrosion of offshore units is an important point, and the offshore facilities and equipment have suffered serious corrosion.

In addition, in terms of blades, as we move toward the deep sea, the blades are getting longer and longer. The assumptions of the original blades in the design process are no longer valid. We need to use new methods to study this longer and larger Blade, we also encountered some examples in our work. The blades are designed in full accordance with the standard. Our national standard design blades. The national standard requires four-direction verification for stability. The four-direction verification blades are fully qualified. When installed on the fan blades, it still appears instability. It is found that the other one is in the four directions. The direction is unstable, so when our specifications are being studied here, we will require the blade to do stability analysis in 12 directions, so as to better ensure the safety of the blade.

For offshore wind turbines as a whole from top to bottom, it is not appropriate for us to analyze it separately or to study it. Therefore, in our certification, we will include the upper nose, tower, and foundation. In the structural analysis, these parts interact to form an organic whole, which cannot be separated. Therefore, we will require the overall construction of the membrane, the overall analysis and Evaluate as a whole. 

The article originated from Polaris Wind Power NetworkIf there is any infringement, please contact us, we will deal with it as soon as possible