The Changji-Guquan ±1100 kV ultra-high-voltage direct current (UHV DC) transmission project has transmitted more than 50 TWh of electricity in 2026, ranking first among all UHV DC projects in China, according to State Grid Corp of China.

As of 10:00 on September 10, the project's cumulative transmission for the year exceeded 50 TWh, State Grid said.

The project runs from the Changji converter station in Xinjiang Uygur autonomous region to the Guquan converter station in Anhui province. With a line length of 3,293 km spanning six provinces, it is the world's highest voltage, largest capacity and longest distance UHV transmission project.

Since commissioning in 2019, the project's power transmission has grown steadily, with a maximum daily delivery of 250 GWh. It has ranked first among China's UHV DC projects for five consecutive years.

During the summer of 2026, electricity loads in Anhui repeatedly hit record highs, with more than ten cities including Hefei, Xuancheng and Ma'anshan setting new peaks. The Changji-Guquan project leveraged its cross-regional transmission advantage and the time difference between eastern and western China to support evening peak power supply in East China.

The project's maximum transmission power reached 11 GW, capable of covering about one-sixth of Anhui grid's peak load, giving full play to the optimized allocation of cross-regional energy resources.

To ensure the safe and stable operation of the transmission corridor, State Grid Xinjiang Electric Power Co., Ltd. has built a three-dimensional operation and maintenance system combining drones, intelligent robots and manual inspections, strengthening equipment condition monitoring and live detection to track the status of key equipment such as converter transformers and converter valves in real time.

During the peak summer period, the company implemented special patrols and manufacturer on-site support measures to safeguard the long-term safe operation of the cross-regional energy transmission corridor.