Core Insights - The Jiangsu Yangzhou-Zhenjiang ±200 kV DC transmission project has been completed and is the world's first multi-source commutation DC transmission project, enhancing the existing cross-river transmission capacity by three times, contributing to global energy transition efforts [1] Group 1: Project Overview - The Yang-Zhen DC Phase II project spans approximately 228 kilometers with a transmission capacity of 1.2 million kilowatts, passing through seven counties in Jiangsu province [1] - The project includes 47 kilometers of new DC transmission lines co-located with 500 kV AC lines and two new converter stations, significantly increasing the cross-river transmission capacity without adding new crossings [1] - The project is expected to deliver over 6 billion kilowatt-hours of electricity annually to the Yangtze River Delta, equivalent to the annual electricity consumption of about 2 million households, with over 30% of this being renewable energy [1] Group 2: Technological Innovations - The project features the world's first converter station utilizing multi-source commutation technology (SLCC), which allows for power sharing between two 220 kV AC grids, enhancing the efficiency of power dispatch [1][3] - The integration of traditional DC transmission technology with static reactive power compensation and filtering devices creates a new type of converter unit that supports the stable integration of variable renewable energy sources [3] Group 3: Regional Energy Transition - Jiangsu's energy transition is accelerating, with over 95% of the new power generation capacity expected to come from renewable sources by 2025 [2] - The region has established a mixed AC-DC grid to improve the efficiency of clean power transmission by approximately 20%, addressing the spatial and temporal imbalance between renewable energy generation and consumption [2] - The completion of the Yang-Zhen DC Phase II project contributes to a provincial mixed AC-DC grid structure, enhancing the "north-to-south" transmission capacity to approximately 25 million kilowatts [2]

Core Insights - The Jiangsu Yancheng to Zhenjiang ±200 kV DC transmission project has been completed and put into operation, marking China's first hybrid AC-DC cross-river project [1] - The project will deliver over 6 billion kWh of electricity annually to the Yangtze River Delta load center, significantly enhancing regional grid regulation capabilities [1] Group 1 - The Yancheng-Zhenjiang DC Phase II project has a total length of approximately 228 kilometers and a transmission capacity of 1.2 million kW, passing through three cities: Huai'an, Yangzhou, and Zhenjiang [1] - The new DC transmission line includes 47 kilometers that are co-located with 500 kV AC lines, and two new converter stations have been built, tripling the existing cross-river transmission capacity without adding new crossings [1] - The hybrid AC-DC grid allows for more flexible, long-distance, and high-capacity power transmission, effectively addressing the temporal and spatial imbalance between power generation and consumption in Jiangsu [1] Group 2 - The project showcases technological innovation, with nearly 1,000 personnel involved at peak construction and the use of advanced equipment such as heavy-duty drones for cable deployment, enhancing both construction efficiency and safety [2] - Jiangsu has established a backbone network of ultra-high voltage "one AC and four DC" and 500 kV "seven vertical and seven horizontal" grids, and has launched the country's first "AC to DC" embedded transmission project with the Yancheng-Zhenjiang DC Phase I project [2] - With the operation of the Yancheng-Zhenjiang DC Phase II project, Jiangsu has preliminarily formed a provincial hybrid AC-DC grid structure, increasing the "north-to-south" transmission capacity to approximately 25 million kW [2]