The link connects the grids of New Brunswick and Hydro Québec in southeast Canada.
Under the deal, ABB will install its MACH control and protection system and upgrade the valves and valve cooling system.
The upgrade of the back-to-back converter station is anticipated to significantly enhance grid reliability and help reduce maintenance needs.
The new station is expected to start operations in 2016 and ABB said this is the 21st major HVDC modernization project and the 15th upgrade of control and protection systems awarded to it since 1990.
ABB Power Systems division head Claudio Facchin said: "This upgrade will enhance power availability, reduce outages and improve grid reliability in the region.
"The project also reiterates our continued focus and commitment to growing our service business."
Hydro-Québec generates, transmits and distributes electricity, particularly using renewable energy sources, especially hydroelectricity.
Image: ABB will upgrade the valves and valve cooling system. Photo: Courtesy of ABB.
