6月15日，攀西电网优化改造工程全面建成投运。随着攀西电网完成历史性重塑，四川电网实现结 构性升级，有力推动了四川电力外送通道向清洁能源基地延伸，为"西电东送"国家战略构筑了更坚实 的保障体系；有力提升了攀西地区向省内负荷中心的输电能力，大幅增强了电网运行灵活性与极端故 障抵御能力，实现外送更稳、内供更强、支撑更优。 该工程是推动西南地区构建新型能源体系、加速绿色低碳转型的关键一步，也是推动清洁能源优 势向区域发展动能转化的具体实践。攀西地区得天独厚的资源优势将进一步转化为强劲的经济增长动 力，为区域发展注入了新活力。 为什么要优化？ 疏经通络，"外科手术"化解系统风险 攀西电网优化改造工程新建的500千伏建叙线翻越高海拔山脉。周毅/摄 工程保驾护航。国网四川电力用最高标准、最强组织、最严要求、最实措施、最佳状态，制定了环环 相扣的施工计划，扎实开展工程建设。 2022年11月，这场国家电网公司有史以来最复杂的500千伏省级电网优化改造工程，在阵阵机械声 中拉开序幕。 工程历时三年、分为五个阶段实施，新建500千伏开关站一座、500千伏线路680公里，涉及15回在 运500千伏线路改接、8座变电站改扩建、超1 ...

Core Insights - The Panxi region is the largest clean energy base in Sichuan and a key area for the national "West-East Power Transmission" strategy [1] - The 500 kV provincial power grid optimization project commenced in November 2022 and is expected to take nearly three years to complete, divided into five phases [2] - The project enhances the internal supply capacity and resilience of the Sichuan and Southwest power grids, ensuring more stable external power delivery and stronger internal supply [1] Group 1 - The Panxi region's clean energy capacity is projected to exceed 50 million kilowatts by the end of 2025, forming a complementary clean energy system of "water, wind, and solar" [1] - The region has a dense transmission network with 46 lines of 500 kV and above, crucial for the power security of Sichuan and the East and Central China regions [1] - The optimization project includes the construction of a new 500 kV substation, 680 kilometers of 500 kV lines, and upgrades to eight substations, involving over 1,000 kilometers of optical cable communication system modifications [2] Group 2 - The project is described as a "precision surgery" for the power grid, facing unprecedented challenges in Sichuan's power grid construction history [3] - The construction involves crossing high-voltage lines, railways, and roads 70 times, with 94% of the route in mountainous areas and significant ice challenges [3] - Innovative technologies have been applied to improve efficiency, achieving a 60% mechanization rate in mountainous areas and reducing the workforce by over 1,100, with a 40% increase in operational efficiency [3]

Core Insights - The completion and commissioning of the Panzhixi power grid optimization project significantly enhance the transmission capacity to Sichuan's load center, improving grid flexibility and fault resistance [1][2][3] Group 1: Project Overview - The Panzhixi region is the largest clean energy base in Sichuan and a key area for the "West-to-East Power Transmission" strategy, with plans to exceed 50 million kilowatts of clean energy capacity by the end of 2025 [1] - The project involved the construction of a new 500 kV substation, 680 kilometers of 500 kV lines, and upgrades to 8 substations, resulting in a total of 10 outgoing 500 kV lines and an additional 2.5 million kilowatts of supply capacity [2][3] Group 2: Engineering Challenges - The project faced significant challenges, including crossing high-voltage lines and various infrastructures 70 times, with 94% of the route in mountainous areas and some sections experiencing severe weather conditions [2] - Innovative construction techniques were employed, achieving a 60% mechanization rate in mountainous areas and reducing the workforce by over 1,100, while improving operational efficiency by 40% [2] Group 3: Operational Management - A multi-level supervision mechanism was established by the State Grid Corporation to ensure orderly project progress, with a focus on precise management through a "five-stage construction method" [2] - The project included comprehensive safety measures, with 151 accident prevention plans and 19 drills conducted to ensure stable operation during the transformation [2]