Hornsea Project One

Hornsea Project One is a major offshore wind farm located in the North Sea, developed by the Danish energy company Ørsted. Upon its completion in 2020, it became the world's largest offshore wind farm, capable of powering over one million UK homes. The project represents a significant milestone in the United Kingdom's transition to renewable energy and is a cornerstone of the country's legally binding climate targets.

Overview

Situated approximately 120 kilometres off the coast of Yorkshire, the wind farm covers a vast area of the North Sea. It was developed as part of the Crown Estate's third round of offshore wind leasing, specifically within the Dogger Bank region. The project's electricity is transmitted to the national grid at National Grid's substation in Killingholme, Lincolnshire, via high-voltage direct current technology. Its scale and output have solidified the United Kingdom's position as a global leader in offshore wind capacity, contributing significantly to the European Union's broader renewable energy goals.

Development and construction

The development was led by Ørsted, following the company's acquisition of the project from its original developer, SMart Wind, a consortium involving Mainstream Renewable Power and Siemens Financial Services. Financial close for the multi-billion-pound project was achieved in 2016, with key financial partners including Mitsubishi Corporation and PensionDanmark. Major construction contracts were awarded to companies like Van Oord for foundation installation and Nexans for cable manufacturing. The Swire Group's Pacific Orca installation vessel was instrumental in erecting the turbines, with onshore construction works centered around the Port of Grimsby, which serves as the operation and maintenance hub.

Technical specifications

The wind farm comprises 174 Siemens Gamesa SWT-7.0-154 wind turbines, each with a capacity of 7 megawatts and a rotor diameter of 154 metres. The total installed capacity is 1,218 megawatts. The project utilizes a sophisticated two-stage power transmission system: the offshore substation platform, built by Sembcorp Marine, collects the alternating current, which is then converted to high-voltage direct current by converter stations supplied by Siemens Energy. This power is transmitted via subsea and underground cables to the onshore converter station at North Killingholme, before being fed into the National Grid at the adjacent substation.

Operation and impact

Since becoming fully operational, Hornsea Project One has made a substantial contribution to the United Kingdom's electricity mix, displacing significant amounts of fossil fuel generation and reducing carbon dioxide emissions. Its operation is managed from the Port of Grimsby, one of the world's largest offshore wind operations centers. The project has also stimulated the local economy in regions like Yorkshire and the Humber, creating numerous skilled jobs in operations, maintenance, and the wider supply chain. Its success has been recognized within the industry, influencing subsequent projects in the Hornsea zone and the development of the larger Dogger Bank Wind Farm.

Future developments

Hornsea Project One is the first phase in a larger development zone. The subsequent Hornsea Project Two, also developed by Ørsted, began operations in 2022, further expanding capacity. The even larger Hornsea Project Three has received development consent and is progressing through planning. These projects are central to the United Kingdom's ambitious targets outlined in its Ten Point Plan for a Green Industrial Revolution and are expected to play a crucial role in achieving the goals of the Paris Agreement. The continued expansion in this sector is also driving innovation in areas like hydrogen production and grid stability technologies.

Category:Wind farms in England Category:Offshore wind farms in the North Sea Category:Renewable energy in the United Kingdom