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 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]