On October 30, 2026, the first converter transformer of the Chongqing Guizhou Back to Back Interconnection Project, a key project of the National 14th Five Year Plan for Electric Power Development, was successfully delivered to the construction site of the Chongqing Guizhou Converter Station in Longsheng Town, Qijiang District, Chongqing. The project officially entered the stage of core electrical equipment installation.

This converter transformer departs from Changzhou, Jiangsu, and travels through a multimodal transportation route of water, land, and rail. It undergoes four replacement operations throughout the journey, taking 42 days to trek nearly 2193 kilometers before finally arriving at the site. The equipment is 10.564 meters long, 4.01 meters wide, and 4.83 meters high, with a total weight of 344 tons. The entire transportation process requires extremely high requirements for road bearing capacity, turning radius, and equipment protection. To ensure the smooth entry of large equipment, the local area has specially renovated the entrance road from Longsheng toll station to converter station, and built a new 1-kilometer dedicated transportation vehicle channel for large equipment, solving the problem of insufficient traffic capacity of the original road.

At present, the construction progress of the Chongqing Guizhou converter station site has been completed by about 75%. There are a total of 13 converter transformers in the station, and the last one is expected to arrive at the site in January 2027. Subsequent core equipment will enter the site according to the water, land, and rail intermodal transportation mode. All parties involved in the construction will closely monitor the construction nodes and steadily promote equipment installation and commissioning work. After the completion of the project, it will effectively open up the interconnection channel between the State Grid and the Southern Power Grid, achieve bidirectional peak shaving and mutual assistance of electricity between Chongqing and Guizhou, efficiently absorb surplus clean energy in the southwest region, greatly improve the resilience of regional power emergency supply, and build a solid barrier for power supply in the Sichuan Chongqing Guizhou region.Editor/Cheng Liting