近年来，江苏能源转型步伐加快。江苏2025年全年新增发电量中新能源贡献占比超95%。由于约98%的 风电和超近70%的光伏装机分布在苏中、苏北地区，而近60%的用电负荷集中在苏南，电力资源呈 现"逆向分布"。"为促进新能源高效消纳，我们在现有交流电网中嵌入直流输电通道，构建交直流混联 电网。相较于纯交流电网，交直流混联电网可更灵活、远距离、大容量输送清洁电力，提升输电效率约 20%，有效缓解新能源发电与用电负荷之间的时空不平衡问题。"国网江苏电力建设部副主任刘晓东表 示。 截至目前，江苏已建成特高压"一交四直"、500千伏"七纵七横"主干网架，并投运国内首个"交流改直 流"嵌入式输电工程——扬镇直流一期工程。随着扬镇直流二期工程投运，江苏初步形成省域交直流混 联电网格局，"北电南送"输电能力提升至约2500万千瓦。 2月12日，我国首个交直流混联跨江工程——江苏扬州至镇江±200千伏直流输电二期工程(以下简称"扬 镇直流二期工程")建成投产。这是世界首个多源换相直流输电工程，将原有跨江输电能力提升3倍，为 我国乃至全球能源绿色转型提供经验。 扬镇直流二期工程线路全长约228公里，输电容量达120万千瓦，途经江 ...

Core Insights - The first "AC to DC" project in China, the Yangzhou-Zhenjiang ±200 kV DC transmission first phase project, has delivered 10 billion kWh of renewable energy, equivalent to the annual electricity consumption of approximately 3 million households, replacing about 950,000 tons of standard coal and reducing CO2 emissions by 2.55 million tons, significantly supporting energy structure optimization and low-carbon development in the Yangtze River Delta region [1][2] Group 1 - The Yangzhou-Zhenjiang DC transmission project was initiated in December 2022 to address the insufficient transmission channels between renewable energy generation in northern Jiangsu and the load centers in southern Jiangsu [1] - The first phase of the project, operational since April 2024, has become a vital artery for the transmission of wind and solar energy across the Yangtze River, utilizing innovative "AC to DC" technology to increase transmission capacity from 500,000 kW to 1,200,000 kW [1] - The project has been running safely for over 20 months, with an average daily transmission of approximately 16 million kWh, effectively alleviating the transmission pressure from renewable energy-rich areas in northern Jiangsu [1] Group 2 - The second phase of the Yangzhou-Zhenjiang DC project is nearing completion and is expected to be operational by February [2] - The third phase is currently in the research phase, with an expected completion date in 2028 [2] - Future plans include the construction of additional "embedded" DC transmission projects, such as the Nantong to Suzhou DC transmission project, to contribute to the integrated development of the Yangtze River Delta and the establishment of a new power system [2]