Posters

Abstract

As we are moving towards a more cost efficient offshore wind (OW) systems, it becomes increasingly important to assess the environmental impact of these large scale infrastructures. This work assesses the environmental footprint of different electrical infrastructure alternatives. The main focus is parameters where we as system designers and developers are able to influence the outcome, especially when it comes to Global Warming Potential (GWP), but other relevant affects are briefly assessed. Key design choices that strongly influence the environmental footprint of electrical systems include the selection between AC and DC architectures depending on the distance to shore, the voltage levels used, the choice of cable conductor material (copper versus aluminum), the location of the offshore wind farm, and, for Offshore Floating Wind (OFW) projects, the specific type of floater technology employed. By applying conventional methodologies for system design and cable design, a Life Cycle Analysis is performed to differentiate the different alternatives at manufacturing stage. Following this a powerflow analysis is preformed to estimate losses over the lifetime of the OW Thanks to a cross-industry cooperation between offshore wind developers and equipment manufacturers. The work have resulted in a robust understand of the systems and challenges the industry is facing, as well as accurate and realistic input parameters and methodologies for technical analysis and life cycle assessment. The main focus is on the cable design and equipment necessary for the export system. Highlighting the differences and their implications for environmental performance.