Posters - WindEurope Annual Event 2024

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We would like to invite you to come and see the posters at our upcoming conference. The posters will showcase a diverse range of research topics, and will give delegates an opportunity to engage with the authors and learn more about their work. Whether you are a seasoned researcher or simply curious about the latest developments in your field, we believe that the posters will offer something of interest to everyone. So please join us at the conference and take advantage of this opportunity to learn and engage with your peers in the academic community. We look forward to seeing you there!

PO088: Impact of array cable pre-laying on floating offshore wind farm installation campaigns

Chen Yung, Research Scientist, TNO


Inter-array cables can be installed either prior to or after the floating turbine installation. Currently, the common practice is to install and pull in the array cables after the floating turbines are hooked up on site. Whereas in array cable pre-laying, the cable is firstly laid on the seabed for wet storage with a marker buoy. The cable pull-in is performed afterwards by the anchor handling vessel already on site for mooring hook-up. The benefit of pre-laying array cables is that the cable laying is removed from the project's critical path, which can give a leeway of time for subsequent installation campaigns. Also, if the wind farm installation campaign is ahead of schedule, the earlier the owner can start receiving its financial returns on investment. A case study was set up to investigate the impact of array cable pre-lay on the costs and schedule of a 600 MW floating wind farm installation campaign. The analysis has been performed using discrete event simulations, considering 30 years of historical met-ocean data. The simulation showed that array cable pre-lay could shorten the working hours of the cable installation vessel by 20%, and reduce the logistical cost for the entire wind farm installation by 5.6%. The entire wind farm installation schedule varied from -4.7% to +1.1%, with an average reduction of 1.8%. It is likely that the time and cost reduction would be offset when additional equipment costs and risks are considered. However, it also implies the potential benefit of pre-laying array cables when there is a short supply of cable installation vessels, and making more use of existing anchor-handling vessels in the market.

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