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OFFSHORE INTEGRATED GRIDS


FEATURE SPONSOR


EVOLVING THE INDUSTRIAL REVOLUTION


The power to connect in the 21st Century


In 1885, Queen Victoria famously sent the first transatlantic telegram to US President James Buchanan via subsea cable. Seventy-four years earlier, the first ever power-transmitting underwater cable had been installed in the Isar River in Bavaria. These two events, bookending a century of engineering firsts and industrial innovation, are the foundation of the subsea cable industry. Today, that industry runs a global network of subsea infrastructure and power cables that stretches over half a million miles, keeping the lights on and enabling global communications. For example, the world’s longest subsea interconnector cable now runs over 590 kilometres (km) between the Netherlands and Norway.


UK NETWORK


The UK already has four subsea cable interconnectors linking it to France, the Netherlands, and Ireland, with several more proposed or under development, including an ambitious subsea cable to link the UK and Iceland. Now at the feasibility stage, once installed it could deliver the first geothermal electricity to the UK – with social and economic benefits for both countries.


For the past 50 years, JDR has been at the heart of this essential industry, leading the way in the design and manufacture of subsea cables. Its subsea production umbilicals, including electrical, hydraulic and fibre optic designs, provide vital connections to offshore installations around the world, delivering power and control functions that support the production of oil & gas from the seabed.


BESPOKE POWER CABLES


The company’s bespoke power cables also have the power to connect the offshore wind and marine energy industries. Custom designed cables transfer electrical energy from offshore wind turbines, tidal energy devices, or


wave energy converters to the shore, bringing cleaner, sustainable energy supply to communities across Europe. Offshore renewables are an increasingly important part of the energy mix – and offer exciting opportunities for the UK and much of mainland Europe. Estimates suggest that tidal energy could hold 50% of the continent’s total energy resource. Wave energy has the potential to deliver between 10 and 20% of the world’s energy needs – four times more than the total installed nuclear capacity.


RELIABILITY AN ESSENTIAL FACTOR


Reliable cabling that connects tidal generators or wave energy converters back to the grid are an essential factor for realising this opportunity. JDR is therefore directing significant research and development effort to optimise the development of specialist cables for the wave & tidal industry, offering enhanced seabed stability in high tidal currents.


NEW ‘WET DESIGN’ 66KV CABLE


One of the first outcomes from renewed focus on innovation is a new ‘wet design’ 66kV cable, whose development, high- voltage and full-scale wet-age testing, cable splicing, joints and connectors were all fully qualified and type-tested in 2016. The new 66kV cabling steps up the voltage from the 33kV intra-array standard cable voltage capacity and enables power to be transmitted to and from larger turbines that are installed further offshore. This is essential as the wind industry starts to look beyond shallower waters to build its next generation of windfarms.


FLOATING OFFSHORE WINDFARMS


Another advantage of JDR’s ‘wet design’ 66kV cable innovation is that it is ideally suited for dynamic floating offshore wind applications. The design offers significant weight and endurance benefits over


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www.windenergynetwork.co.uk


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