Siemens Energy, Aker Solutions to supply HVDC transmission for Sunrise Wind project

The consortium of Siemens Energy and Aker Solutions has been awarded the supply contract to deliver the high-voltage direct current (HVDC) transmission system to bring green energy from the Sunrise Wind offshore wind project in New York to the mainland of the USA. 

Located about 50 kilometers (30 miles) east of Long Island, the 924 MW wind farm is developed by a joint venture of Ørsted and Eversource. Sunrise Wind project will supply energy to nearly 600,000 homes in New York State and support the state to meet its 100% clean electricity by 2040 goal. The project will be the first offshore wind farm in the U.S. to use HVDC technology, delivered by Siemens Energy.

The HVDC system will enable the low-loss transport of the generated green energy from the wind farm to the mainland and will consist of two converter stations. The offshore converter station will collect the 66 kilovolts (kV) alternating current (AC) power generated by the wind turbines through an inter-array cable system and transform it to 320 kV DC for transmission through a 160 kilometers export cable to the onshore converter station, located at Holbrook on Long Island. The onshore station will convert the power back to AC to feed it into the distribution grid which will bring the energy to homes, industry, and other end-users in New York. 

Aker Solutions will be responsible for the platform consisting of a steel jacket substructure, and a topside platform deck housing the electrical equipment. Sunrise Wind will support the establishment of an enduring offshore wind supply chain in New York State. The onshore installation of the project’s converter station will be carried out by local companies. The final deliveries are scheduled for the second half of 2025.