Power and Propulsion
ABB has secured a contract with Guangzhou Shipyard International (GSI) to deliver an integrated power and propulsion package to semi-submersible heavy transport vessel (HTV) Grand Tour.
The 230-meter long vessel has been ordered by global offshore contractor Allseas, and will provide a key link in the logistics chain supporting Europe’s offshore wind energy industry.
On its delivery in 2028, Grand Tour will carry very large converter stations from fabricators in Asia and Europe and transfer them directly to Allseas’ construction vessel Pioneering Spirit for installation.
Converter stations are at the heart of long-distance offshore power transmission as they turn AC electricity from turbines into DC for site-to-shore transfer by power cable.
Power, control and manoeuvrability are key vessel attributes for Grand Tour, which will carry loads of up to 40,000 metric tons on its stern deck and position itself alongside Pioneering Spirit while lowering its main deck below the waterline to float converter stations directly onboard.
ABB’s supply includes four 3.5MW nozzled Azipod units, providing sufficient thrust to serve Grand Tour’s bollard pull and dynamic positioning (DP) needs. Rotating 360 degrees, Azipod propulsion will support precise manoeuvring into position at Pioneering Spirit’s bow.
The units will be equipped with optimized nozzles to ensure high efficiency also during transit. Gearless Azipod units reduce mechanical losses and fuel consumption – thereby helping to reduce emissions – as well as noise and vibration compared to conventional mechanical thrusters.
In addition, the gearless design helps to minimize the need for lubrication oil, reducing the need for maintenance and thereby lowering operating costs. The technology’s compact footprint provides flexibility in design and facilitates efficient installation.
The full ABB package includes a medium-voltage AC power plant in a closed ring topology, controlled by PEMS power and energy management system and enhanced power plant protection system (EPPS).
The full-scope powertrain solution is complete with remote condition monitoring and maintenance capabilities.
