Bentley > Case Studies > Fujian Yongfu's Innovative Wind Turbine Foundation Resisting Typhoons and Earthquakes

Fujian Yongfu's Innovative Wind Turbine Foundation Resisting Typhoons and Earthquakes

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Technology Category
  • Sensors - Flow Meters
  • Sensors - Temperature Sensors
Applicable Industries
  • Mining
  • Renewable Energy
Applicable Functions
  • Facility Management
  • Product Research & Development
Use Cases
  • Construction Management
  • Construction Site Monitoring
Services
  • Testing & Certification
About The Customer
Fujian Yongfu Power Engineering Co., Ltd. is a power generation company based in Changle, Fujian, China. As part of China's push to increase the country's production of renewable energy and reduce the use of carbon-emitting fuels, the company is installing numerous wind facilities off the country's coast. Fujian Yongfu is committed to developing innovative solutions to overcome the challenges posed by geographically complex areas and harsh environmental conditions. The company's latest project, the China Changle Offshore Wind Farm Area C, is one of the world's deepest locations for a wind farm and is a testament to their commitment to innovation and environmental sustainability.
The Challenge
Fujian Yongfu Power Engineering was tasked with building a large wind farm in a geographically complex area prone to typhoons, earthquakes, and shifting soil. The location for the wind farm, the China Changle Offshore Wind Farm Area C, is one of the world's deepest locations for a wind farm with an average water depth of between 31 and 45 meters. The company planned to install 62 wind turbines, each with a capacity of 8 megawatts, for a total capacity of 496 megawatts. However, the site's frequent typhoons, unstable soil, and high earthquake risk necessitated the development of particularly strong and stable foundations for each turbine. Traditional methods of offshore wind design proved inadequate, producing expensive designs and failing to accurately simulate the interaction between the soil and a pile with such a large diameter. The company also faced budget constraints, necessitating a cost-effective solution.
The Solution
Fujian Yongfu decided to build the foundations with suction pile frames, a method not previously used for offshore wind turbines. To overcome the limitations of traditional design methods, the company turned to digital design software. They used Bentley's OpenWindPower Fixed Foundation and PLAXIS to create a unified design environment that allowed simultaneous soil analysis and foundation design. PLAXIS was used to perform a full analysis of the soil in the construction area and measure the potential effects of design options. OpenWindPower Fixed Foundation was used to form and optimize the design of the foundation while examining its interaction with the soil. A suction pile module within SACS was used to import PLAXIS analysis and create a composite model, which was then adjusted to increase strength and stability. The result was a three-pile suction conduit frame, a design previously only used in experimental environments within China.
Operational Impact
  • The innovative solution developed by Fujian Yongfu not only met the challenges posed by the geographically complex area but also brought significant environmental benefits. The three-pile suction conduit frame foundation, a design previously only used in experimental environments within China, was successfully built on a large scale. This design reduced the amount of steel needed for each foundation, made construction faster and easier, and eliminated the need for some staging platforms and larger construction equipment such as pile driving vessels. The wind turbines can withstand typhoons, shifting soil, and earthquakes, ensuring their longevity and reliability. Moreover, the design helped Fujian Yongfu minimize environmental impact by sustaining water quality, minimizing erosion, and protecting marine and avian life.
Quantitative Benefit
  • Compared to traditional offshore wind turbine designs, the solution reduces costs by 30%, saving more than CNY 400 million.
  • The wind farm eliminates the use of 535,000 tons of coal annually.
  • The solution cuts carbon dioxide emissions by 1,462,600 tons.

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