On June 18, the world’s first ±800 kV/8 GW controllable line commutated converter (CLCC) successfully passed all test verifications. The CLCC was independently developed by the scientific and technological research team for new DC converter equipment of State Grid Corporation of China. The testing success placed China at the forefront of efforts to overcome the commutation failure that has plagued the UHVDC transmission for more than half a century.
Boasting prominent advantages such as large transmission capacity, low power loss, high reliability and strong system support capability, the CLCC technology can independently generate a compensation voltage when grid disturbances occur, thereby ensuring the stable gigawatt-level power transmission in UHVDC systems.
This major breakthrough in DC transmission represents a unique Chinese solution to a global challenge. It will greatly enhance the transmission capacity and operational reliability of the West-to-East Power Transmission Project, providing robust support for China's transition to clean energy sources and the development of a new power system.
