Cross Sound Cable - an energy bridge to Long Island

HVDC > HVDC References > North America > Cross Sound HVDC Light

Cross Sound Cable is a HVDC Light underwater cable link between Connecticut and Long Island, New York. The developer was TransÉnergie U.S., a subsidiary of Hydro-Québec. The link is now owned by Babcock & Brown Infrastructure.

Overview of the Shoreham station

New Haven indoor AC yard

ABB has provided a complete 330 MW, 40-kilometer HVDC Light transmission system. The system is made up of high-tech extruded (oil-free) cables buried under the seabed, with a converter station at New Haven, Connecticut and Shoreham on Long Island.

The Cross-Sound link improves the reliability of power supply in the Connecticut and New England power grids, while providing urgently needed electricity to Long Island. The HVDC Light connection is also designed to promote competition in the New York and New England electricity markets by enabling electricity to be traded among power generators and customers in both regions.

Main data
Commissioning year:	2002
Power rating:	330 MW
No of circuits:	1
AC Voltage:	345 kV (New Haven), 138 kV (Shoreham)
DC Voltage:	±150 kV
Length of DC submarine cable:	2 x 40 km
Main reason for choosing HVDC Light:	Controlled connection for power exchange. Submarine cables.