Statkraft will jointly develop the wind farm with renewable energy firm RWE Innogy. Onshore construction anticipated to commence in 2017.
Located off the east coast of England, the wind farm will deliver enough energy for about 800,000 households in the UK per year.
The project, which is expected to cost between £3bn and £4bn, will create about 1,900 jobs.
A joint project team of RWE and Statkraft will deliver the development and construction phases of the wind farm, which received a development consent order (DCO) for the offshore array from the UK Government in July 2013.
Both the companies will apply to the Planning Inspectorate in the spring of 2015 for a DCO for the electrical system.
Statkraft head of offshore wind Olav Hetland said: "The project itself is blessed with ideal characteristics for an offshore wind farm, including shallow waters, strong wind resource, and excellent ground conditions.
"In addition, it is in an area of seabed which Statkraft knows very well from its Sheringham Shoal and Dudgeon offshore wind projects."
RWE Innogy CEO Hans Bunting said: "Securing partners for projects such as Triton Knoll has been a key objective in our renewables strategy, and this latest successful partnership with Statkraft highlights the attractiveness of our developments and RWE’s continued commitment to offshore wind."
RWE Innogy and Statkraft together have interest in over 6.5GW of offshore wind assets.
Image: Triton Knoll site overview. Photo: Courtesy of Statkraft.