Converter stations are used to switch electricity from alternating current (AC) to direct current (DC) - or vice versa. HVdc lines are used for subsea transmission of large amounts of electricity and converter stations are a type of specialized substation that helps integrate them into the electrical system that serves homeowner and business customers. The converter station in New Brunswick will change the electricity from AC to DC so it can be transmitted underwater more efficiently. The other converter station, in Massachusetts, will switch the electricity from DC back to AC to match the current that is used in the larger power grid. A converter station currently under construction for the Maritime Link project is depicted below.

Bottom Brook