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CABLE HARNESSES


FEATURE SPONSOR


WIRING THE BAY OF FUNDY FOR POWER


Home to the highest tides in the world, the Bay of Fundy pushes roughly 160 billion tonnes of water – more than all the freshwater rivers and streams in the world combined


Often referred to as the ‘Everest of Tidal Power’, Fundy’s tidal flow speeds up as it pinches through a narrow section called the Minas Passage, resulting in water speeds that can exceed 20km/ hr. This is precisely where Canada’s leading test facility – the Fundy Ocean Research Center for Energy (FORCE) is located.


PERFECT CONDITIONS “It’s a lot of water, moving very fast,” enthused Tony Wright, FORCE’s General Manager. “The energy potential is staggering: roughly 7,000 megawatts.”


Bringing even a fraction of that energy ashore required a cable.


“Getting the specs right for our subsea cables was a predictive exercise,” Tony continued: “We needed it to be durable. We also needed it to be capable of receiving additional power – allowing for both single devices and arrays.”


CABLE SPECIFICATION FORCE has approximately 11km of 34,500-volt submarine cable, insulated with ethylene propylene rubber and double-armoured with steel. With four cable lengths in total, the combined carrying capacity is up to 64MW.


“They’re big – each cable is over 100 tonnes and over two kilometres long. They connect to our substation onshore – where we’ve recently installed a 30 megawatt transformer,” Tony added.


PLANNING AND OPERATION Planning the cable installation took roughly two years and the operation itself lasted an entire month, from mobilisation through sea trials and finally cable deployment. Over 25 personnel were directly involved in planning, mobilising, surveying and installing the cables, with support from teams from Nova Scotia, Atlantic Canada and the UK. In November 2016, Cape Sharp Tidal became the first company to connect to FORCE’s cable, and deliver power to the grid.


“Fundy is unlike any other marine area. It adds a lot of complexity. Whether we’re talking about installing a cable, or deploying a turbine, or monitoring the environment, getting it right is about three things: practise, practise and practise,” Tony concluded.


Fundy Ocean Research Center for Energy (FORCE)


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www.wavetidalenergynetwork.co.uk


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