The world's first 660 kilovolt high-voltage direct current (HVDC) transmission line has transmitted around 300-billion kilovolt electricity from northwest China to east China in the past decade.
As the world’s first ±660 kV DC power transmission project, the Yindong DC transmission project (Ningxia Ningdong-Qingdao, Shandong) has been in commercial operation for more than 4600 days in a long period since it was officially put into commercial operation on February 28, 2011. The electricity sent out reached 298.5 billion kilowatt-hours.
This "power artery" with a length of more than 1,300 kilometers opens up the north passage of China's "West-to-East Power Transmission". The energy utilization rate of the project has been ranked first in the country for many years, and it is the cross-provincial DC with the best commercial operation efficiency in my country. Power transmission project.