藏粤直流工程启动建设—— 跨过三级阶梯 绿电“闪送”广东

Core Points - The construction of the "Tibet-Guangdong DC Project" has commenced, which is a key cross-provincial power transmission project under China's 14th Five-Year Plan, representing the world's strongest transmission capacity and the largest investment scale in flexible DC transmission technology [1] - The project spans approximately 2,681 kilometers across Tibet, Yunnan, Guangxi, and Guangdong, with a total investment of about 53.2 billion yuan and a rated transmission capacity of 10 million kilowatts [1] - The project aims to convert Tibet's resource advantages into economic benefits by facilitating the transmission of clean energy [1] Technical Challenges and Innovations - The project addresses the challenge of integrating large-scale renewable energy in high-altitude areas by employing domestically developed, world-leading flexible DC transmission technology [2] - The technology allows for flexible scheduling of green electricity from different regions and times, ensuring uninterrupted power supply with a transmission time of just 9 milliseconds from Tibet to Guangdong [2] - The collaboration between Southern Power Grid Company and State Grid Corporation aims to tackle significant technical challenges related to high-altitude DC transmission and the integration of renewable energy into weak grids [2] Research and Development Achievements - The research team has conducted over 3000 discharge tests and completed 114 test groups, yielding valuable data for high-altitude discharge [3] - The development of the world's first energy self-balancing flexible DC converter valve and breakthroughs in ultra-long-distance multi-terminal flexible DC fault crossing have been achieved [3] - The project emphasizes digital transformation, aiming to implement machine-based operations in less populated areas and promote digital design and digital twin technology [3] Future Outlook - The Tibet-Guangdong DC Project is expected to be fully operational by 2029, with an annual transmission capacity of over 43 billion kilowatt-hours of clean energy to the Guangdong-Hong Kong-Macao Greater Bay Area, equivalent to half of the annual output of the Three Gorges Dam [3]