The Ningxia-Hunan ±800 kV Ultra-high Voltage Direct Current (UHVDC) Transmission Project has officially commenced operation.
The project, built by State Grid Corporation of China, began transmitting power on Aug 20. This project is China's first UHV transmission corridor primarily designed to deliver power from large-scale wind and photovoltaic bases in desertified areas. It holds significant strategic importance for promoting the cross-regional optimization of clean energy and enhancing the power supply's reliability.
As a key project connecting the western regions rich in new energy resources with the central regions where power demand is high, it has a rated voltage of ±800 kV and a transmission capacity of 8 million kilowatts. The line starts from Zhongning Converter Station in Zhongwei, Ningxia, passes through Gansu, Shaanxi, Chongqing, and Hubei, and finally reaches Hengyang Converter Station in Hunan, spanning a total length of 1,616 kilometers.
This is Ningxia's third UHV transmission line for exporting electricity. It is expected to transmit over 36 billion kilowatt-hours of electricity to Hunan annually, with at least 50 percent of it coming from renewable energy sources. This will significantly enhance the external power reception capabilities of Hunan's power grid, allowing it to handle up to 16 million kilowatts.