The EPC contract for the Greater Gabbard topside transformer platform was awarded to Heerema Hartlepool by Siemens in 2008,
and was the first ever EPC project in the offshore wind energy sector for HFG. After an initial design period, fabrication commenced in September 2008. One year later the substation was loaded on a seagoing barge and left Heerema Hartlepool for installation at its final location in the North Sea. It was the first substation platform to be sited in UK waters.

The construction of the Greater Gabbard topsides started in September 2008 at the yard in Hartlepool.
The topsides consist of a main deck, a small accommodation area and a helicopter platform. It has been designed by HFG’s in-house engineering company HFG Engineering.

With its total capacity of 480 Megawatts the Greater Gabbard substation platform it the largest offshore wind farm in British waters. The power generated by the offshore windfarm will be transmitted via underground and subsea cabling to an onshore sub-station at Sizewell, near Leiston in Suffolk.

Client:Siemens Energy
Contract type:EPC (Engineering, Procurement & Construction)
Location:Offshore UK, 27 km off coast Suffolk
Structure:Offshore Substation topside
Project completion: 2009