Floating Offshore Wind
Presentation Description: A current challenge to increase the cost efficiency of the offshore wind industry is the cost of the electrical distribution system. For far-from-shore floating wind farms, the transmission costs account for half of the total costs. Offshore substations are a fundamental part of the distribution system. Different types of offshore substations can be used, the presentation focuses on the benefits of subsea substations and addresses the main challenges seen in offshore substation design and selection. A subsea substation can be placed near the wind farm in deep waters, it is not affected by harsh sea and weather conditions, it does not require a floating structure in deep waters, it does not require dynamic high voltage export cables (currently not qualified) and does not pose a threat to other ocean users.
The oil and gas industry has used subsea substations for the last two decades. However, there isn't a standardized subsea substation design developed particularly for offshore wind. The presentation describes the technology building blocks currently available and introduces the world's first subsea high voltage power components integrated in an optimized subsea substation module especially designed for wind farms. The panel presentation will describe the main components of the subsea substation, current capabilities, and the technology developments to step-up from today's 33 kV to 66 kV dynamic inter-array, and 145 kV to 220 kV export connection system voltage.
The panel presentation also addresses the expected CAPEX reductions, enabled by the use of subsea substation, and the positive impact on energy cost. Other socio-economic benefits of using subsea substations and the impact on local communities will be part of the presentation,