Tower assembly for the Chengdu Airport 500-kilovolt power transmission and transformation project is underway, with the project scheduled to enter operation in November 2025

On December 30, the 110-kilovolt supporting project of the Chengdu Airport New City 220-kilovolt substation was commissioned, marking the full commissioning of all 24 large- and medium-sized power grid infrastructure projects scheduled by State Grid Chengdu Power Supply Company for completion in 2025, further enhancing the power supply capacity of Chengdu's grid.

Grid construction in Chengdu in 2025 was characterized by both project scale and commissioning volume exceeding normal levels. A total of three 500-kilovolt substations, three 220-kilovolt substations, and four 110-kilovolt substations were commissioned, adding a cumulative transformer capacity of 9.237 million kilovolt-amperes and 1,442.8 kilometers of transmission lines.

During project implementation, construction teams faced challenges involving 33 critical crossings. State Grid Chengdu Power Supply Company established a dedicated coordination mechanism with relevant departments, including China Railway Chengdu Group and highway authorities, and innovatively adopted a dynamic 'window' reservation model to precisely align with available construction periods, ensuring orderly cross-domain operations. Additionally, mechanized netting and visualized stringing technologies were employed, and heavy-lift drones were used for crossing construction for the first time in Sichuan Province, successfully completing key projects such as the Chengdu Airport 500-kilovolt transmission and transformation project.

During the '15th Five-Year Plan' period (2026–2030), State Grid Chengdu Power Supply Company will implement the Chengdu 500-kilovolt three-dimensional dual-loop network reinforcement project, simultaneously advancing the construction of 220-kilovolt and lower-voltage grids and enhancing distribution network reliability to continuously promote high-quality development of Chengdu's new-type power system.

【本文部分内容由AI辅助生成，特此声明。The author(s) generated part of the content in this work with the assistance of artificial intelligence (AI), which is hereby declared.】