HVDC
> HVDC Development > UHVDCThe increased interest in recent years for
transporting clean and renewable energy from remote hydro generation plants has
also increased the interest in higher DC transmission voltage than presently
used (i.e. 600 kV DC). This has led to development of Ultra High Voltage Direct
Current (UHVDC) at 800 kV DC.
800 kV Ultra High Voltage Direct Current (UHVDC) transmissions are
economically attractive for bulk power transmissions of 5,000 – 8,000 MW over
1,000 – 1,500 km or above. 800 kV HVDC transmission projects are already in
execution phase, and 800 kV is now an established voltage level for bulk power
transmission over long distances.
ABB started with the development for
800 kV equipment to make this voltage increase possible. ABB also planned for a
long time test circuit installation to establish a confidence in this new
voltage level. The long term test circuit installation has been energized
at 855 kV since November 2006 at the STRI
Laboratory in Sweden. It has well served its purpose in providing final
qualification for the newly developed products and boosting confidence in 800 kV
HVDC technology with several utilities around the world.
ABB was awarded
the converter equipment for the Xianjiaba - Shanghai ±800 kV HVDC Transmission project rated
for 6,400 MW to transmit power over a distance of over 2,000 km by State Grid
Corporation of China in December 2007.
Papers and presentations on
UHVDC:
Link to ABB Library on UHVDC