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HVDC Classic (LCC)

High power transmission

HVDC LCC, by Hitachi Energy called HVDC Classic, is primarily used for connecting remote generation over long distances, Grid interconnection and DC links in AC grid, overland or subsea, where conventional AC methods cannot be used.

Today there are more than 170 HVDC LCC installations in all parts of the world. The HVDC Classic transmission typically has a power rating of more than 100 megawatts (MW) and many are in the 1000 – 12000 MW range. 

With HVDC Classic from Hitachi Energy, it is possible to transmit power in both directions and to support existing AC grids in order to increase robustness, controllability and stability of the grid.

What is HVDC Classic?

  • Most economical way to transmit high power over long distances
  • Long submarine cable connections possible
  • Around three times more power in a right-of-way than overhead AC 

Our offering

Hitachi Dolwin5 , Emden, Germany
Foto Jonas Bilberg

HVDC Light®

HVDC Light®

HVDC Light®, based on VSC technology (Voltage Sourced Converter), is designed to transmit power underground and underwater, also over long distances. It offers numerous environmental benefits, including “invisible” power lines, neutral electromagnetic fields, oil-free cables and compact converter stations.

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HVDC converter station

HVDC converter station

Electricity is converted from alternating current (AC) to direct current (DC) and vice versa in a converter station. This is done by means of high-power, high-voltage electronic semiconductor valves.

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HVDC Service

Life-cycle services for HVDC

Life-cycle services for HVDC

Hitachi Energy has long experience in providing maintenance service and delivering upgrades for HVDC links all around the world.

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Ireland. Woodland. Interiors, exteriors and details from the site in Woodland, Ireland.

MACH™ control and protection system

MACH™ control and protection system

The control system is the brain in HVDC transmission systems. One of the most important advantages with modern HVDC technology is the controllability.

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IdentiQ™ for HVDC

IdentiQ™ for HVDC

IdentiQ™ for HVDC solution for sustainable, flexible and secure power grids. IdentiQ™ for HVDC uses digital twin technology with state-of-the-art data visualization, to provide clear operational insights in real time.

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