TwinHub

Introduction

The TwinHub floating offshore wind farm, located approximately 16km off the coast of Hayle in Cornwall within the Wave Hub test site, represents a groundbreaking demonstration project in the renewable energy sector. Enersynt, entrusted by Hexicon, played a pivotal role in conducting power system studies and performing techno-economic assessments of various grid connection designs in preparation for the UK's inaugural Contracts for Difference (CfD) auction for floating offshore wind.

Project background

With 80% of Europe's offshore wind potential lying in waters deeper than 60 meters, the development of floating offshore wind energy is paramount for future expansion. The TwinHub project embodies this vision, featuring two TwinWind floating platforms utilizing Hexicon's patented technology, each equipped with two 8.0 MW wind turbine generators mounted on inclined towers. Leveraging the strategic location within the Wave Hub site off the coast of Hayle, the project optimizes existing infrastructure, minimizing installation requirements.

Role of Enersynt

Enersynt's role in the TwinHub project was multifaceted. Initially, the team verified the technical suitability of the existing grid connection infrastructure, meticulously analyzing the existing 6-core submarine cable. Detailed cable models were prepared to determine ampacity and electrical parameters, ensuring compatibility with project requirements. Subsequently, Enersynt constructed a comprehensive simulation model of the wind farm and grid connection.

Through load flow simulations, the team evaluated the reactive power capability and active power losses of both existing grid infrastructure and alternative connection schemes. These findings were instrumental in conducting a techno-economic assessment of the various grid connection options, providing Hexicon with critical insights for strategic decision-making.

In addition to assessing grid connections, Enersynt supported Hexicon in preparing the Request for Proposal for turbine supply, installation, commissioning, and operation & maintenance. This comprehensive support ensured the project's readiness for the CfD auction.

Conclusion

Through its expertise in electrical engineering and grid optimization, Enersynt provided invaluable support to Hexicon during the preparation for the UK's first CfD auction for floating offshore wind. The success of Hexicon's bid in the auction signifies a milestone achievement, with the TwinHub project slated for operational launch in 2026. Enersynt takes pride in its contribution to maximizing efficiency and minimizing grid integration challenges, underscoring its commitment to advancing sustainable offshore wind energy solutions.