26MW Offshore Wind Turbine & Bearings Make China National Major Tech Equipment List

Recently, the General Office of the National Energy Administration issued the "Notice on the Public Announcement of the Fifth Batch of the First (Sets) of Major Technological Equipment in the Energy Sector". The "26MW-class semi-direct drive offshore wind turbine generator set and main shaft bearings, full range of gearbox bearings" project participated by the Dongfu Research Institute under the Oriental Research Institute was shortlisted for the fifth batch of the public announcement list of the first (sets) of major technological equipment in the national energy sector.

A 26MW offshore wind turbine rolled off the production line in Fuqing, Fujian Province, in October 2024. This unit boasts the world's largest single-unit capacity and longest rotor diameter, a domestically produced offshore wind turbine. With a fully independent and controllable supply chain and world-leading key component technologies, it represents the latest achievement in the rapid technological advancement of China's wind power equipment industry chain. During the same period, the Dongfang Electric Offshore Wind Power R&D Center was officially established at the Dongfu Research Institute.

To ensure the safe, stable, and efficient operation of the first 26MW offshore wind turbine throughout its lifecycle and to support the development of its intelligent operation and maintenance and condition-based maintenance system, Dongfu Research Institute independently developed a fully domestically produced online wind turbine monitoring system and successfully applied it to this ultra-large capacity unit. Based on independent control, the R&D team built an intelligent sensing system that integrates multiple parameters such as vibration, temperature, and speed using domestically produced core components. They innovatively proposed a key technical solution for intelligent fault warning based on fast Fourier transform and online spectrum analysis, enabling real-time perception and accurate status assessment of the operating status of key components in the wind turbine drive chain. This system can provide accurate and reliable data support for the formulation of preventive maintenance strategies for the unit, reduce unplanned downtime and operation and maintenance costs, and significantly improve the unit's power generation availability and overall economic efficiency.

my country's marine environment is complex and volatile, characterized by high salinity, high humidity, and strong corrosion. To meet the long-term corrosion protection requirements of 26MW offshore wind turbine towers in extreme marine environments and further improve the protective coating system for large-capacity offshore wind turbine towers, the Dongfu Research Institute's anti-corrosion coatings R&D team, leveraging its marine functional materials R&D platform, has successfully developed an offshore wind turbine tower anti-corrosion coating with independent intellectual property rights. The coating proposes key solutions such as micro-nano composite modification technology, proprietary coating system design, and adaptive coating processes. The coating has passed rigorous environmental simulation testing and performance verification, achieving reliable protection in a multi-factor coupled corrosion environment, including high salinity, high humidity, and strong ultraviolet rays, significantly improving the tower's corrosion resistance and durability throughout its lifecycle.

Looking ahead, the Oriental Research Institute will rely on the Dongfang Electric Offshore Wind Power R&D Center to continue to increase its efforts in scientific and technological innovation, and further promote the research and development of core offshore wind power technologies and independent research and development of marine and special environmental protection materials, contributing Oriental's strength to achieving the dual carbon goals and building a strong maritime nation.