Jiangsu Rudong Offshore Wind Project Transmits 10 Billion kWh

The CTG Jiangsu Rudong offshore wind power project has reached a significant achievement by transmitting over 10 billion kilowatt-hours (kWh) of clean electricity to the grid. This milestone was reported by the operator, China Three Gorges Corp (CTG), and reflects the project's operational success since it achieved full-capacity grid connection in 2021. Located in the Huangshayang sea area off Rudong county in Nantong, Jiangsu province, this facility is notable not only for its scale, with an 800-megawatt capacity, but also as Asia's first offshore wind project to utilize flexible direct current (DC) transmission technology. The project has set the standard for future developments in offshore wind energy, demonstrating the viability of high-capacity, long-distance flexible DC transmission technology in this sector.

Historically, offshore wind energy has relied on alternating current (AC) transmission methods, which face limitations over long distances and high capacities. The development of the Jiangsu Rudong project has marked a turning point, as it serves as the world's largest-capacity and highest-voltage (400 kilovolt) offshore wind flexible DC transmission project. As the industry moves toward deeper and more remote waters, where wind resources are more abundant, the need for innovative solutions like flexible DC transmission has become critical. Experts have highlighted that the success of this project not only validates the technology but also paves the way for future applications in deep-sea wind energy generation, which is essential for meeting increasing energy demands sustainably.

The implementation of the Rudong project involved significant collaboration among various stakeholders, including engineers, marine equipment manufacturers, and local authorities. The operational team faced numerous challenges in a harsh marine environment characterized by high humidity, salinity, and the threat of typhoons. They successfully managed the integration of complex systems, ensuring the stable operation of the 400 kV flexible DC system. Moreover, they conducted long-distance submarine cable monitoring and maintenance, which were crucial for the project's success. The project has operated safely and stably for over 1,600 days, with a remarkable equipment availability rate of 99.5 percent. This diligence in management has allowed the facility to generate sufficient clean energy to meet the annual electricity demand of approximately 4 million households.

The broader economic, environmental, and social benefits of the Jiangsu Rudong project are substantial. The generation of 10 billion kWh of clean energy has resulted in the equivalent of saving 3 million metric tons of standard coal and reducing carbon dioxide emissions by 7.4 million tons. These outcomes significantly contribute to China’s green transition and efforts to combat climate change. Additionally, the project has stimulated the local economy by accelerating the maturation of the domestic supply chain for high-end marine engineering equipment. The commercial application of home-grown components, such as ultra-high-voltage flexible DC converter valves and specialized submarine cables, has effectively addressed previous technical bottlenecks that hindered deep-sea wind power commercialization.

Looking ahead, the success of the Jiangsu Rudong project sets a promising precedent for the future of offshore wind energy in China. As flexible DC transmission technology continues to mature and localized manufacturing costs decrease, it is expected to become standard for upcoming gigawatt-scale deep-sea wind power clusters. This will facilitate the stable and efficient integration of vast amounts of marine renewable energy into the national grid. The advancements made through this project will not only benefit China but also serve as a model for other countries aiming to enhance their offshore wind capabilities and contribute to global sustainability goals.