Design, construction and testing of a simple blade pitch measurement system for small wind turbines

TL;DRAbstract

Reliability in performance is a key factor in ensuring the sustainable operation of a small wind turbine. Despite the great potential of small wind turbines to provide electric power, particularly in remote areas, many small wind turbines have short lifetimes due to technical failures or the excessive costs of numerous maintenance visits. In developing countries where the support infrastructure for wind turbine operation and maintenance has yet to be established, turbine reliability has a higher priority than efficiency of the turbine or, to quote from Schläpfer, “10% efficiency of something is always better than 80% efficiency of nothing”.
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\nFor wind turbines to be reliable they must have in place good mechanisms to protect themselves against very high winds or sudden removal of load. Both these scenarios can lead to “over-speeding” of the turbine rotor where the rotor experiences speed excursions that exceed the rated speed of the blade manufacturer. Over-speeding can lead

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