近年来，随着西藏经济社会和清洁能源产业快速发展，电力负荷高速增长、清洁能源规模大幅上升，对 跨省区电网工程的输电能力提出了更高要求。为满足西藏地区不断增长的用电需求和绿电外送需求，提 高青藏直流联网工程双向输电能力，2024年5月，国家电网有限公司启动青藏直流二期扩建工程，在工 程两端的柴达木、拉萨2座换流站开展扩容改造，同时对工程原有控制系统进行全面升级，进一步提升 工程的灵活性和可靠性。扩建工程于2025年9月28日正式投运，为西藏经济社会高质量发展提供坚强能 源保障，进一步实现我国西北-西南电网双向灵活互济、水光互补。 近日，国家"十四五"规划重点工程——青藏直流二期扩建工程投运满月，扩建工程将"电力天路"升级为 2.0版本，输电能力从原有60万千瓦跃升至120万千瓦。工程投运一个月以来，累计输送电量3.7亿千瓦 时，较2024年同期增长62.8%，为推动西藏清洁能源大规模外送，助推青海、西藏两省区协同绿色低碳 发展注入新动能。 青藏联网工程是我国首条进入西藏的"电力天路"，东起青海西宁，西至西藏拉萨，于2011年12月建成投 运，架起了连接青藏的能源大动脉，有效解决了西藏地区长期以来冬季严重缺电、夏季 ...

"电力天路"2.0版本实现输电能力翻倍 中新社西宁10月28日电 (张璞 李江宁)28日，青藏直流二期扩建工程迎来投运满月。扩建工程将"电力天 路"升级为2.0版本，输电能力从原有60万千瓦跃升至120万千瓦。 据悉，该工程投运一个月以来，累计输送电量3.7亿千瓦时，较2024年同期增长62.8%，为西藏经济社会 高质量发展提供坚强能源保障，为推动西藏清洁能源大规模外送、助推青藏两省区协同绿色低碳发展注 入新动能，进一步实现中国西北—西南电网双向灵活互济、水光互补。 青藏联网工程是中国首条进入西藏的"电力天路"，东起青海西宁，西至西藏拉萨，于2011年12月建成投 运，架起连接青藏的"能源大动脉"，有效解决西藏地区长期以来冬季严重缺电、夏季水电消纳难的矛 盾。截至目前，工程已平稳运行近14年，累计输送电量达到241.3亿千瓦时，其中，青海向西藏输送电 量138.7亿千瓦时，西藏向青海输送电量102.6亿千瓦时。 2024年5月，中国国家电网有限公司启动青藏直流二期扩建工程，在工程两端的柴达木、拉萨2座换流站 开展扩容改造，同时对工程原有控制系统进行全面升级，进一步提升工程的灵活性和可靠性。扩建工程 于2025 ...

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]

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 crucial for enhancing electricity supply security in Tibet and optimizing the allocation of clean energy [1][2] Group 1: Project Overview - The project aims to meet the growing electricity demand in Tibet and improve the bidirectional transmission capacity of the Qinghai-Tibet DC interconnected project [2] - The total investment for the project is 2.603 billion yuan, with construction starting in May 2023 and operations beginning on September 28, 2023 [2] - The project includes upgrades to the existing control systems, enhancing flexibility and reliability [2] Group 2: Technical Achievements - The project is notable for being the first in China to adopt a converter parallel scheme and to expand on an existing operational project at a high altitude [2][4] - The transmission capacity will allow for winter electricity supply to Tibet, meeting 35% of the region's electricity needs during dry seasons [2] - The project will increase the annual clean energy transmission from Tibet to 2.1 billion kilowatt-hours, leveraging the advantages of a large interconnected grid [3] Group 3: Challenges and Innovations - The construction faced significant challenges due to high altitude, with the project site located at 3,850 meters above sea level, where oxygen levels are about 60% of that at sea level [4] - A medical base was established on-site to ensure the health and safety of construction personnel [4] - The project has increased the number of operational modes from 45 to 117, enhancing its operational flexibility [3][4] Group 4: Strategic Importance - The project supports the national strategy for energy security and the transition to a new power system, contributing to the largest UHV transmission network globally [4] - The cross-regional transmission capacity has increased by 61% from the end of the 13th Five-Year Plan, now exceeding 370 million kilowatts [4] - The company is committed to ensuring early operation and effectiveness of projects while balancing development and safety [4]