总投资26.03亿！青藏直流二期扩建工程投运

Core Insights - The Qinghai-Tibet DC Phase II Expansion Project has officially commenced operations, doubling the power transmission capacity between Qinghai and Tibet to 1.2 million kilowatts, which is significant for enhancing power supply security in Tibet and optimizing the allocation of clean energy [1][2] Group 1: Project Overview - The Qinghai-Tibet DC interconnected project is the first "power highway" into Tibet, serving as a green channel for power transmission during both wet and dry seasons [1] - The Phase I project, which was completed in 2011, utilized conventional DC technology with a rated voltage of ±400 kV and a line length of 1,038 kilometers [1] - The total investment for the Phase II expansion project is 2.603 billion yuan, which was approved in February 2024, began construction in May, and was completed on September 28, 2023 [1] Group 2: Technical and Operational Enhancements - The project includes capacity upgrades at the Chaidamu and Lhasa converter stations, increasing the transmission power from 600,000 kW to 1.2 million kW, along with a comprehensive upgrade of the existing control systems to enhance flexibility and reliability [1] - The upgraded transmission capacity will allow for winter power delivery to Tibet, meeting 35% of the region's electricity demand during the dry season, thus addressing the electricity shortage in winter [2] - The project is expected to increase the annual clean energy export from Tibet to 2.1 billion kWh, leveraging the advantages of a large interconnected grid to meet the power supply needs of Qinghai and facilitate the absorption of clean energy in Tibet [2] Group 3: Broader Industry Impact - The State Grid Corporation is accelerating the construction of a new power system, having established the world's largest UHV transmission network, with cross-provincial and cross-regional transmission capacity exceeding 370 million kW, a 61% increase from the end of the 13th Five-Year Plan [2] - This infrastructure development provides strong support for ensuring reliable power supply and promoting green and low-carbon development [2]