Tidal Power Feeds National Grid
SeaGen, the world’s first commercial-scale tidal turbine has delivered electricity into the grid for the first time. The tidal current turbine has briefly generated 150 kW of power onto the grid as part of its commissioning work, ahead of it achieving full capacity later this year. SeaGen’s power is being intentionally constrained to 300 kW during the commissioning phase. However, once fully operational, it will generate 1.2 MW of power.
Located in Northern Ireland’s Strangford Lough and developed by British tidal energy company, Marine Current Turbines (MCT), SeaGen works in principle
 |
much like an “underwater windmill” with the rotors driven by the power of the tidal currents rather than the wind. Strangford Lough has a highly energetic tide race and, therefore, is recognized as one of the main tidal “hotspots” in UK and Irish waters. Other areas are the waters off Anglesey, the Pentland Firth and the Channel Islands.
SeaGen was installed in Strangford Lough in May of this year and commissioning work has been taking place since then, including the vital grid connection undertaken in partnership with Northern Ireland Electricity. Marine Current Turbines expects that the present testing and commissioning phase will be completed by the end of the summer and an official “switch on” will take place. Irish energy company, ESB Independent Energy, is purchasing the power generated by SeaGen for its customers in Northern Ireland and the Irish Republic.
When fully operational the tidal system’s 16-meter diameter, twin rotors will operate for up to 18 to 20 hours per day to produce enough clean, green electricity, equivalent to that used by a 1000 homes. This is four times greater than any other tidal stream project so far completed, including MCT’s earlier 300 kW Seaflow system installed off Lynmouth on the north Devon coast more than five years ago.
Martin Wright, Managing Director of Marine Current Turbines said: “This is an important milestone for the company and indeed the development of the marine renewable energy sector as a whole. SeaGen, Marine Current Turbines, tidal power and the UK Government’s push for marine renewables all now have real momentum. The marine environment poses a number of unique technical challenges, not least installing SeaGen in an extremely aggressive tide race, so we are delighted that Marine Current Turbines has delivered yet another world-first in this sector. It’s a major technical break-through. Our engineering team has done a fantastic job.”
Secretary of State for Energy, John Hutton said: “This kind of world first technology and innovation is key to helping the UK reduce its dependency
 |
on fossil fuels and secure its future energy supplies. Marine power has the potential to play an important role in helping us meet our challenging targets for a massive increase in the amount of energy generated from renewables.
“My department has supported SeaGen from the start, granting £5.2 million in funds to take it from the drawing board and into the waters of Strangford Lough. This, and our plans to double the financial support for marine technologies, is further evidence of our commitment to making the UK one of the most attractive places to invest in green energy.”
Liam Molloy of ESB Independent Energy said: “We are on course to be the first company in Ireland and Britain to provide customers with electricity powered by tidal energy. This is a very significant breakthrough which underlines ESB Independent Energy’s ongoing commitment to providing our customers with a range of renewable energy options.”
Marine Current Turbines’ next project, announced in February 2008, is a joint initiative with npower renewables to take forward a 10.5 MW project using several SeaGen devices off the coast of Anglesey, north Wales. It is hoped the tidal farm will be commissioned around 2011/2012. The company is also investigating the potential for tidal energy schemes in other parts of the UK and in North America.
