High-Voltage Direct Current (HVDC)

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.

HVDC Classic

HVDC Classic, based on LCC technology (Line Commutated Converter), 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.

Life-cycle services for HVDC

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

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.

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.

Back to back

An HVDC back-to-back station can be used to create an asynchronous interconnection between two AC networks.

City center infeed

Cables and small converter stations - HVDC has great potential for city applications.

Connecting remote generation

HVDC transmissions already deliver electricity generated by hydro, wind, and solar plants to millions of consumers every day.

Connecting remote loads

Avoid using expensive fuel in small uneconomic plants - make an HVDC connection to a larger grid.

DC links in AC grids

DC technology provides a more secure and optimized control of a network's load flow, as well as quick power restoration in the event of a significant disturbance, even a blackout.

HVDC extensions, upgrades and retrofits

Being proactive and planning an upgrade is far better than passively waiting for a breakdown.

Interconnecting grids

In many regions of the world, liberalized energy markets have introduced the phenomenon of trading to electricity sectors and trading is enabled by coupling electricity markets with network interconnections.

Offshore wind connections

Hitachi Energy's technology for the offshore wind power industry is essential in the transmission of high quality power with minimal loss.

Overhead transmission lines for HVDC

Many classical HVDC systems use overhead transmission lines. In most cases, this is due to very high power transmissions and long distances, approximately 600 km or more, usually from remote power generating stations.

Power from shore

HVDC Light® can be used to deliver power both to and from offshore platforms.