我国首个交直流混联跨江工程建成投产，这是世界首个多源换相直流输电工程

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]