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{{See also|Orbital O2}}
'''Orbital Marine Power Ltd''' is an [[Orkney]]-based developer of floating tidal stream turbines that have twin rotors either side of a long tubular hull. Their third-generation turbine, the 2 MW [[Orbital O2]] has been deployed at the Fall of Warness since 2021.<ref name=":12">{{Cite web |title=Orbital Marine Power : EMEC: European Marine Energy Centre |url=https://www.emec.org.uk/about-us/our-tidal-clients/orbital-marine-power/ |access-date=2023-12-03 |language=en}}</ref> The company was founded in 2002 as Scotrenewables Tidal Power Ltd, but rebranded in 2019.<ref name=":02">{{Cite web |date=2019-04-30 |title=Orbital Marine Power going with the ebb and flow |url=https://www.heraldscotland.com/business_hq/17608237.orbital-marine-power-going-ebb-flow/ |access-date=2023-12-03 |website=The Herald |language=en}}</ref>
[[File:Hydrolienne-D03-Sabella-PortNavalo.jpg|alt=The Sabella D03 turbine. Painted bright yellow, a steel frame tripod supports the nacelle containing the generator. To the right, painted blue is the 6-bladed rotor, the tips of the blade connected by a metal band. The turbine is sat on a quayside with metal barriers around it.|thumb|Sabella D03 turbine, with 3m rotor]]
=== Sabella ===
'''Sabella SA''' is a French [[Small and medium-sized enterprises|SME]] based in [[Quimper]],Brittany that has been developing tidal turbines since 2008, however the company was placed into receivership in October 2023. <ref>{{Cite web |title=Who we are? |url=https://www.sabella.bzh/en/home/ |access-date=2023-12-22 |website=Sabella |language=en-GB}}</ref><ref>{{Cite web |last=Garanovic |first=Amir |date=2023-10-23 |title=Sabella goes into receivership |url=https://www.offshore-energy.biz/sabella-placed-in-receivership/ |access-date=2023-12-22 |website=Offshore Energy |language=en-US}}</ref> The company had developed two main variants of their technology.
The '''D03''' was a 30 kW horizontal-axis turbine, with a six-bladed rotor 3 m in diameter, hence the name.<ref>{{Cite web |title=D03 |url=https://www.sabella.bzh/en/our-projects/d03/ |access-date=2023-12-22 |website=Sabella |language=en-GB}}</ref> It was tested in the [[Odet]] estuary in 2008, but not grid connected. The turbine weighed 7 tonnes, and sat on a gravity base in around 25 m deep water.
[[File:Hydrolienne Sabella D10 (2).JPG|alt=Looking up at the Sabella D10 turbine from ground level. At the top of the image are 6 large blades around a bulbous hub, all painted bright blue. The cylindrical nacelle behind is supported on a pile with tubular steel bracing forming a tripod. The Nacelle and foundation are painted bright blue.|thumb|Sabella D10 turbine]]
The larger 1 MW '''D10''' turbine was then developed, and tested in the [[Fromveur Passage]], Brittany from June 2015. After hackers interrupted the communications link with the turbine, it began supplying power to the grid in [[Ushant]] on 5 November 2015.<ref>{{Cite web |last=Poindexter |first=Gregory |date=2016-03-23 |title=Hackers rendered 1-MW Sabella D10 tidal turbine inoperable in France |url=https://www.hydroreview.com/business-finance/hackers-rendered-1-mw-sabella-d10-tidal-turbine-inoperable-in-france/ |access-date=2023-12-22 |website=Hydro Review |language=en-US}}</ref> The device was periodically removed for maintenance, for example in April 2019 after having been re-deployed in October 2018.<ref>{{Cite web |date=12 April 2019 |title=Sabella tidal device undergoes maintenance |url=https://renews.biz/52642/sabella-tidal-device-undergoes-maintenance/ |website=ReNEWS.biz}}</ref> It was redeployed for a third test campaign in April 2022,<ref>{{Cite web |last=Garanovic |first=Amir |date=2022-05-04 |title=Sabella reinstalls D10 tidal turbine for third test campaign offshore France |url=https://www.offshore-energy.biz/sabella-reinstalls-d10-tidal-turbine-for-third-test-campaign-offshore-france/ |access-date=2023-12-22 |website=Offshore Energy |language=en-US}}</ref> and in September 2023, it was reported the turbine was supplying around 25% of the electricity used on Ushant Island.<ref>{{Cite web |last=Garanovic |first=Amir |date=2023-10-10 |title=Sabella’s D10 tidal turbine breaks power production record |url=https://www.offshore-energy.biz/sabellas-d10-tidal-turbine-breaks-power-production-record/ |access-date=2023-12-22 |website=Offshore Energy |language=en-US}}</ref>
The D10 turbine is also a horizontal-axis turbine, with a six-bladed rotor and a direct drive permanent magnet generator. It is mounted on a tubular steel tripod foundation approximately 23 m wide, with the turbine 12.5 m above the seabed.<ref>{{Cite conference |last=Paboeuf |first=Stéphane |last2=Sun |first2=Pascal Yen Kai |last3=Macadré |first3=Laura-Mae |last4=Malgorn |first4=Gaël |date=June 19-24, 2016 |title=Power Performance Assessment of the Tidal Turbine Sabella D10 Following IEC62600-200 |url=https://doi.org/10.1115/OMAE2016-54836 |conference=ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering, Busan, South Korea}}</ref>
Sabella announced in January 2022 joint plans with [[Draft:Nova Innovation|Nova Innovation]] to each develop 6 MW of a 12 MW berth at Morlais.<ref>{{Cite web |title=Nova and Sabella secure 12MW Welsh tidal site |url=https://renews.biz/75200/nova-and-sabella-secure-12mw-welsh-tidal-site/ |access-date=2023-11-28 |website=reNEWS.biz}}</ref>
=== SIMEC Atlantis Energy ===
{{See also|SIMEC Atlantis Energy|MeyGen}}
'''SIMEC Atlantis Energy Ltd''' (SAE) is a renewable energy company which is developing the [[MeyGen]] tidal array in the [[Pentland Firth]] between the Scottish mainland and Orkney. Since 2017, this has operated with 4× 1.5 MW tidal turbines, making it the largest tidal-stream array worldwide. The next phases could see a further 50 MW installed by 2028.<ref>{{Cite web |title=MeyGen |url=http://saerenewables.com/tidal-stream/meygen/ |access-date=2023-12-22 |website=SAE Renewables |language=en-GB}}</ref> The company was founded as '''Atlantis Resources''', and developed the 1.5 MW AR1500 turbine, a three-bladed horizontal-axis seabed mounded device.
{{Clear}}
== List of grid-connected tidal stream generators ==
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|Orbital, SR250
|0.25
| rowspan="
{{Flagu|Scotland}}
|EMEC
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|2015-01
|<ref name=":0" /><ref name=":4" />
|-
|Sabella D10
|1
|{{Flag|France}}
|[[Fromveur Passage]]
|{{coord|48|26|54|N|5|1|48|W|}}
|2015-04
|Operational {{NoteTag|Not continuously operation|name=SABELLA}}
|
|-
|Nova Innovation, Nova 30
|0.03
| rowspan="11" |{{flag|UK}}
{{Flagu|Scotland}}
|[[Bluemull Sound]], Shetland
|{{Coord|60|41|59.6|N|0|58|58.1|W}}
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|EMEC
|{{coord|59|8|29.08|N|2|49|6.5|W|}}
|2019-02
|2019-02 {{NoteTag|Off-site from 2020-01 to 2021-04}}▼
|Operational
|<ref name=":6" /><ref name=":7" />
|-
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