CORDIS provides links to public deliverables and publications of HORIZON projects.
Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .
Exploitable results
Reliability of wind turbine blades fitted with a lightning protection system
The 3D finite element modelling of a wind turbine blade fitted with a lightning protection system was completed successfully. It has shown that it is possible that long wind turbine blades fitted with an internal type lightning protection system are vulnerable to lightning strike attachment away from the receptor at the tip.
The work has also shown that the use of multiple receptors will provide better protection for a blade than would otherwise be provided by a single receptor located at the blade tip.
The work related to the installation of magnetic cards in wind turbine blades is still ongoing. It will be a number of years before sufficient data is accumulated.
The high current testing has shown that methods to protect the hydraulic cylinder with the use of a conductor bypass system are largely ineffective. Instead, a novel design of hydraulic cylinder is being considered for use in wind turbine blades. This would be used in conjunction with the bypass conductor.
Use of high resistivity strips
Solid high resistivity strips would appear to be able to intercept and conduct lightning strikes as effectively as a standard lightning protection system under laboratory conditions. When installed on a long blade that is coated with dirt, salt and similar substances, the effectiveness may reduce. High resistivity strips could definitely be used as a retrofit lightning protection system for wind turbines fitted with pitch regulated blades. They may not reduce the incidence of blade lightning damage to zero but it is expected that they may reduce it substantially.
Segmented strips are unlikely to provide a suitable level of interception efficiency on a long wind turbine blade. This was shown by the steady increase in the 50% probability of flashover voltage as more gaps were added into the strip. For this case, and the case with high resistivity strips, further testing (probably at the scale of field trials) would be required to confirm the interception efficiency of these materials.
Therefore, further investigations into the extent of wind turbine EMI need to be conducted to help justify the case for using high resistivity strips on wind turbines.
Evaluating the possibility for the combined use of a blade lightning protection and de-icing system.
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