Siemens Energy and China Southern Power Grid have completed the high voltage direct current (HVDC) system link by putting the second pole into operation.
The system is capable of transporting huge amounts of clean hydro power to Guangdong Province and will double the transmission capacity to 5,000MW.
With one pole operating at +800kV and the other at -800kV, the voltage difference between the poles reaches a world record of 1,600kV DC.
Siemens Energy Power Transmission Division CEO Udo Niehage said the technology is ideal for transporting clean, renewable power over thousands of kilometres to consumers – with nearly zero losses.
Through the transmission line, power produced by several hydro power plants in Yunnan Province will be transported with minimal losses to the industrial region in the Pearl River delta in Guangdong Province.
The link will reduce annual CO2 emissions by over 30mt compared with equivalent fossil-fuelled power plants in the power grid of Guangdong Province.
Siemens designed the HVDC system for the Yunnan-Guangdong project and developed and supplied the core components for the technology including 800kV and 600kV converter transformers, DC filters and all 800kV direct-current components.