The Yantai-Weihai 1,000 kV ultra-high voltage (UHV) project has entered the live testing phase, marking a key step for the world's first UHV project designed to transmit nuclear power.

The project's switch station in Haiyang West began system debugging on September 21, according to a report from Zhuoyue Ludian. After the debugging is completed, the project will enter a 72-hour live trial operation.

The system debugging of the Yantai-Weihai UHV AC project and the Haiyang Xin'an nuclear power transmission project is primarily aimed at comprehensively testing the performance of primary and secondary equipment and the UHV system.

This includes checking whether the UHV system voltage is normal during debugging, whether newly commissioned equipment can withstand multiple switching operation impacts, whether relay protection devices are operating normally, and whether overvoltage, electromagnetic environment, infrared and ultraviolet levels remain within the limits allowed by standards or equipment technical specifications.

The AC system live debugging is scheduled to run from September 21 to September 24, involving 13 test items. The work includes sequentially switching 110 kV low-voltage reactors, switching 1,000 kV no-load lines, and closing and opening 1,000 kV lines, before the project enters the trial operation phase.

The Yantai-Weihai UHV project is the world's first UHV project serving nuclear power transmission and a key channel for transmitting wind and solar power from the Jiaodong Peninsula new energy base in Shandong. The line spans 1,197 km and passes through five cities: Yantai, Qingdao, Rizhao, Weifang and Linyi.

The project connects with the existing UHV ring network in western Shandong to form a "figure-eight" double-ring structure, creating China's first provincial-level UHV double-ring network and helping transmit clean electricity from Jiaodong to all parts of Shandong.