ORE Catapult: ‘Decision tree’ to Help Lower Marine Energy Costs

A new research project looking at optimum layouts for offshore electrical connections for marine energy farms has developed a ‘decision tree’ to help guide designers and developers towards the most cost effective array configuration for their development.

The Optimum Electrical Array Architectures report, produced by the Offshore Renewable Energy (ORE) Catapult with support from energy consultancy TNEI, looked at the existing electrical array options available for collecting and transmitting power from offshore marine devices back to shore, and evaluated how certain considerations, such as the choice of device type, size of project, and distance to the connection point dictates the best array architecture for the site.

Vicky Coy, Project Manager at ORE Catapult, said: “One of the major challenges the marine industry faces is the design of a cost effective and efficient electrical network to collect and transmit power from multi device wave and tidal arrays to shore.

“One solution is to connect each individual device to shore, but for arrays further from shore or with complex landfall conditions, a marine electrical array will need to be designed and built.”

“The aim of the project was to identify a preferred marine electrical architecture that can be adopted by as many wave and tidal developments as possible. The final report concludes that currently there is no ‘one size fits all option’ that will suit every project, but using the ‘decision tree’ will help developers decide on the best, and most cost effective, array option for them.”

Four existing architecture array options currently available for the connection of large scale marine energy devices were evaluated:

  • Direct connection
  • Star cluster with surface piercing platforms
  • Star cluster with floating platforms
  • Radial arrays on seabed

The project also identified that a number of technology development opportunities exist to further develop array architectures that will reduce the electrical infrastructure costs of future marine energy farms. ORE Catapult is keen to work with industry to drive forward these development opportunities, and has launched a number of technology innovation challenges in the area of electrical yield architecture.

The reports can be downloaded at the following links:

Report 1: Landscape Map and Literature Review

Report 2: Review of SSE Contractor Reports

Report 3: Optimum Electrical Array Architectures

Image: JDR Cables
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