HVDC (high-voltage direct current) is a highly efficient alternative for transmitting large amounts of electricity over long distances and for special purpose applications
Have a look at how: Tomorrow's HVDC grid
Learn the basics of HVDC: Introduction to HVDC and HVDC Light.
HVDC Classic is used mainly for transmission of bulk power and AC system interconnections.
HVDC Light - The invisible power transmission based on underground cables.
ABB ensures continued support to the project throughout its lifetime. Upgrades of plants delivered by others is also supplied.