Back to its roots

HVDC stands for High Voltage Direct Current, a well-proven technology used to transmit electricity over long distances by overhead transmission lines or submarine cables. It is also used to interconnect separate power systems, where traditional alternating current (AC) connections cannot be used. The reasons for selecting HVDC instead of AC for a specific project are often numerous and complex. The most common arguments in its favour are: lower investment cost, longdistance water-crossing, lower losses, asynchronous interconnections, controllability, limited short-circuit currents and environment.