Siemens Energy to connect first utility-scale US offshore wind farm to grid

Siemens Energy to connect first utility-scale US offshore wind farm to grid

29 Oct 2021

Siemens Energy has been awarded its first offshore grid connection project in the United States. In a consortium with Aker Solutions, the company will supply the high-voltage direct current (HVDC) transmission system that will bring green energy from Sunrise Wind, New York’s first utility-scale offshore wind project, to the mainland. It is the first offshore wind project in the US to use HVDC technology.

The 924MW wind farm has been developed by a joint venture between Danish clean energy company Ørsted and US-based energy provider Eversource. Located 50km (30 miles) east of Long Island, Sunrise Wind will supply green energy to nearly 600,000 homes in New York State and support the state to meet its 100% clean electricity goal by 2040.

Siemens Energy will deliver the HVDC system on a turnkey basis and provide onshore civil work in partnership with local companies. The HVDC system will enable the low-loss transport of the generated green energy from the wind farm to the mainland. It consists of two converter stations: the offshore converter station will collect the 66kV alternating current (AC) power generated by the wind turbines through an inter-array cable system and transform it into 320kV DC for transmission through a 160km 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 is 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.

For more information please visit Siemens Energy’s website.

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