OAS and ORE Catapult join forces to improve wind turbine control strategies

Posted on 2016-11-15T12:22:25 by Thomas Clark

TurbineGRID simulation tool to be validated on 7MW Levenmouth Demonstration Turbine

Ocean Array Systems (OAS) will use the Offshore Renewable Energy (ORE) Catapult’s 7MW offshore wind demonstration turbine to validate software designed to improve the control strategies of offshore wind turbines. Improved turbine control, adopted farm-wide, could see as much as a 2.4% reduction in the Levelised Cost of Energy (LCOE) of offshore wind. [Source: ORE Catapult Cost Reduction Monitoring Framework 2015]

OAS’s TurbineGRID simulation software enables wind farm owner/operators to better predict how turbines respond to atmospheric turbulence, stability and wake interaction at both individual and farm level.

The project, Simulation to enable Asset Life Extension of wind turbines (SALE), funded by Innovate UK, will use production and load sensor data from the Levenmouth Demonstration Turbine, combined with wind conditions measured through a met mast and Lidar located at the site. These will then be compared with the numerical model of the wind conditions and turbine response of the TurbineGRID software to validate the tool.

The Levenmouth turbine load data will come from sensor instrumentation that is to be installed on the turbine’s blades, tower and substructure to monitor its behaviour in real-world conditions.

Nicola Pearson, OAS Commercial Director, said:

“We have developed an effective method to characterise the effects of turbulence and this is used in our ‘TurbineGRID’ simulation tool to model site-specific turbine and array performance.”
“Wake breakdown and interaction are modelled and these innovations enable a more accurate prediction of blade loading and lifetimes. These tools will enable new control strategies to manage turbine interaction, yield and fatigue loading effects.”

Andy Kay, ORE Catapult’s Innovation Manager, said:

“Our Levenmouth Demonstration Turbine is the world’s most advanced, open access, offshore wind turbine dedicated to research and enables us to support companies in developing and validating new technologies.
“Deploying sensors on the turbine gives us a unique opportunity to understand the behaviour of a large turbine in real-world conditions and the impact of these conditions on turbine production and loads.”

As part of this project, there is also an opportunity for other turbine owner/operators to share array production data in return for the confidential reporting of turbulence characteristics and turbine response using the TurbineGRID software. For further information on this, or to be kept informed of project progress, please contact Nicola Pearson at OAS.

Contact Nicola Pearson to find out more.

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OAS launches TurbineGRID simulation tool

Posted on 2015-11-23T00:00:00 by Thomas Clark

Ocean Array Systems has launched a new simulation product, 'TurbineGRID', making state of the art physical modeling more affordable for the wind industry.

TurbineGRID captures detailed interaction of turbines, wakes and atmospheric turbulence to deliver full 10-minute load cases, without the extreme expense of conventional Computational Fluid Dynamics (CFD).

For many years, turbine manufacturers have relied on low-order calculations like the Blade Element Method (BEM) to model turbine behaviour. However, conventional models do not generalise to arbitrary array layouts - and often take limited account of turbulent effects which dictate fatigue lifetimes.

Now, manufacturers can get detailed information on yield and unsteady component loading, in a wide range of environmental conditions.

Contact Nicola Pearson to find out more.

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Turbulence in Marine Environments: New guidance released

Posted on 2015-11-02T00:00:00 by Thomas Clark

New guidance released on Turbulence in Marine Environments, to improve understanding and reduce risk for the tidal energy industry

The TiME project consortium (consisting of partners Partrac, Ocean Array Systems, ABPmer, and IT Power) has announced today that the Guidance formulated from the TiME (Turbulence in Marine Environments) project has now been released.

The project, funded by the Scottish Government and managed by the Carbon Trust through the Marine Renewables Commercialisation Fund (MRCF) Array Technology Innovation Programme, was developed to improve the understanding of the effect of marine turbulence on tidal arrays in Scottish waters.

Turbulence was measured by Partrac in the challenging tidal environments of both the Sound of Islay and the Inner Sound, Pentland Firth, using novel methods and technologies so that each can be evaluated, and turbulence could be mapped across differing tidal energy development sites. ABPmer then incorporated the data in resource characterisation, Ocean Array Systems (OAS) has provided turbulence characterisation and hydrodynamic analyses, and IT Power has contributed their knowledge of engineering design, device performance and tidal turbine array modelling.

The project team used this wealth of information and research to develop Turbulence Guidance through extensive engagement with the tidal energy industry.

  • New methods have been developed and tested to measure and characterise turbulence. Data from these new methods were then used to show that designing tidal turbines and array layouts to the true turbulence existing at different points in a site could lead to significant cost reductions.

  • Full details are in the guidance documents, which can be obtained here. The guidance will also be submitted to the wave and tidal knowledge network, a platform hosted by the ORE Catapult. The TiME project will also be represented in a pre-conference workshop at the International Tidal Energy Summit (ITES) at the Hilton Tower Bridge, London, UK, on Monday 23rd November, 2015 (see the tidal today agenda).

Sam Athey, a Director and co-owner at Partrac, said “This has been an exciting and challenging project to manage. With the successful attainment of 100% data return from innovative turbulence measurement surveys, and assessment and classification of turbulence by our expert partners at OAS, ABPmer, and IT Power, the project team has developed Guidance that provides a framework for the tidal industry to measure, classify and analyse turbulence for commercial tidal arrays.”

Guy Henley, project manager of the MRCF Array Technology Innovation Programme at the Carbon Trust commented: “The Guidance formulated by the project team is comprehensive and provides a solid understanding of the impact of turbulence on tidal arrays, which is a critical aspect of realising commercial scale tidal arrays. We are confident the industry will find it invaluable for their developments.”

Dr Tom Clark of Ocean Array Systems added “The project has mapped in detail the effects that marine turbulence has on tidal power installations. We demonstrated a practical and efficient end-to-end process for measuring, characterising and simulating the effect of site-specific turbulence. Finally, assessment of its impact on engineering design considerations highlighted the importance of properly accounting for turbulence – especially in considering yield and fatigue lifetimes”.

For more information on the project please contact us.

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