Choose your region and language

Global
Argentina
Australia
Austria
Bahrain
Brazil
Bulgaria
Canada
Chile
China
Colombia
Czech Republik
Denmark
Egypt and North Africa
Finland
France
Germany
Greece
Hungary
India
Indonesia
Iraq
Ireland
Italy
Japan
Jordan
Kuwait
Malaysia
Mexico
New Zealand
Norway
Oman
Pakistan
Panama
Peru
Philippines
Poland
Portugal
Qatar
Saudi Arabia
Singapore
Slovakia
South Africa
South Korea
Spain
Sweden
Switzerland
Taiwan, China
Thailand
Türkiye
Ukraine
United Arab Emirates
United Kingdom
United States
Vietnam
English
Spanish
English
German
English
Portuguese
English
English
French
Spanish
Chinese
Spanish
English
English
English
English
French
German
English
English
English
English
English
English
Italian
Japanese
English
English
English
Spanish
English
English
English
English
Spanish
Spanish
English
Polish
English
English
English
English
English
English
English
Spanish
Swedish
German
French
Italian
English
English
English
English
English
English
English
English
Go

Menu

Customer Story

Changji-Guquan UHVDC link

12,000 megawatts of electricity over 3,000 kilometers at 1.1 million volts, setting new world records on voltage level, transmission capacity and distance


The Changji-Guquan UHVDC (ultrahigh-voltage direct current) link transmits power from the Xinjiang region in the Northwest, to Anhui province in eastern China, having set a new world record in terms of voltage level, transmission capacity and distance.

The link is capable of transmitting 12,000 megawatts of electricity - the equivalent of 12 large power plants, a 50 percent increase in transmission capacity, compared with the 800 kV UHVDC links in operation. This also helps extend the transmission distance from around 2,000 km to over 3,000 km and plays a key role in integrating remote renewables on a large scale, transmitting power over greater distances, and facilitating a more interconnected grid.

Hitachi Energy supplied HVDC converter valves, converter transformers and other high voltage components like wall bushings, tap changers. DC circuit breakers, and capacitors as well as advanced system design support. The transformers are among the most powerful in the world, meeting the most stringent performance, reliability and safety standards. Each transformer weighs 800 tons, measuring 32 meters in length. Hitachi Energy’s state-of-the-art transformer manufacturing and testing facility in Chongqing as well as the local HVDC engineering and technology center have been supporting in the delivery and execution of the project.

Main data
Commissioning year: 2019
Configuration: Bipole
Power rating: 12,000 MW
Direct voltage: ±1,100 kV
Application: Connecting remote generation