On January 21, Jiangxi Hydropower won the bid for the pile foundation construction package of the new Aba 1000 kV substation of the Aba–Chengdu East 1000 kV UHV AC power transmission and transformation project, the highest-altitude UHV substation in China.

The Aba–Chengdu East 1000 kV UHV AC project is an important component of the Sichuan–Chongqing 1000 kV UHV AC project, and is also a national key power transmission project under the national "14th Five-Year Plan" power development plan and the implementation of the Chengdu–Chongqing economic circle construction. The project starts at the Aba 1000 kV substation in Sichuan and ends at the Chengdu East 1000 kV substation, passing through 11 districts (counties) in 4 cities (prefectures): Aba, Mianyang, Deyang, and Ziyang.

The pile foundation construction package of the new Aba 1000 kV substation of the Aba–Chengdu East 1000 kV UHV AC project won by Jiangxi Hydropower is located in Dangan Village, Miyaluo Town, 47 kilometers northwest of Li County, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province, at an altitude of 3,620 meters. The new Aba 1000 kV substation will have 2 sets of 3,000 MVA main transformers. The 1000 kV side adopts one-and-a-half circuit breaker configuration; in this phase, 2 lines and 2 transformers will be built, forming 1 complete string and 2 incomplete strings, with 7 circuit breakers installed.

The pile foundation construction package of the new Aba 1000 kV substation project mainly includes the construction of all pile foundations for the entire station in both the current and future phases, as well as the construction of test piles and anchor piles. The construction process adopts mechanically bored cast-in-place piles with diameters of 600 mm and 800 mm. The main quantities of work include approximately 38,405 cubic meters of C35 concrete, approximately 3,836 tons of rebar fabrication and installation, and pile head treatment and protection for 3,588 piles.

After the project is completed, a new major "West-to-East Power Transmission" corridor within Sichuan Province will be added, forming a zigzag-shaped UHV grid in Sichuan and Chongqing. The voltage level of the Aba power grid will also be upgraded from 500 kV to 1000 kV, and the power transmission capacity will be increased to 7,400 MW. This will effectively accommodate the transmission of clean energy such as hydropower and photovoltaic power from the Aba region, accelerate the transformation of Aba Prefecture from resource advantages to industrial and development advantages, further enhance the power supply capacity and reliability of the Aba region, and simultaneously meet the future 20 million kW new energy transmission demand in western Sichuan, ensuring future power supply in the region.