NL Maritime Link handed over
ABB announced June 12 that it had completed the Maritime Link between Newfoundland and Labrador and the mainland, formally handing over the interconnector to Emera.
The link was used for the first exchange of electricity between the island of Newfoundland and Nova Scotia on December 8 of last year. It went into service on January 15, 2018 as ABB continues to work with Emera and the system operators in each province during initial operation.
The Maritime Link is a 500 megawatt high-voltage direct current (HVDC) connection that will enable hydropower generated in Newfoundland and Labrador to be transmitted to the North American grid in Nova Scotia, reducing dependence on fossil fuels. The stabilizing features of ABB’s solution will also allow Nova Scotia to integrate additional renewables such as wind power and contribute to Canada’s emission-reduction efforts.
ABB says its HVDC Light® technology, used in the design of the Maritime Link, is the first bipolar configuration of its kind in the world using “proven and reliable” Voltage Source Converters (VSC). This solution acts to enhance system availability, reduces losses and increases grid reliability, as power continues to flow even if one conductor or converter is not in use. The converter stations are equipped with the ABB Ability™ based advanced MACH™ control and protection system, which acts like the brain of the HVDC link. It monitors, controls and protects the sophisticated technology in the stations and manages thousands of operations to ensure power reliability. Its fault registration and remote control functions also help protect the link from unexpected disruptions, such as lightning strikes.
In addition to the two converter stations for the ±200 kilovolt HVDC link, the project scope includes two 230 kV alternating current (AC) substations in Newfoundland, one 345 kV AC substation in Nova Scotia and two cable transition stations.
ABB calls its HVDC Light a preferred solution for long-distance underground and underwater power links and inter-connections like the Maritime Link Project. The latest generation of this technology can transmit power at ±640 kilovolts (kV) over 2,000 kilometers and deliver up to 3,000 MW of electricity.