Small wind turbines have been installed in urban
and turbulent locations with surprisingly poor performance and this has been
backed up by data from a trial at the Dublin Institute of Technology. In order
to develop the small wind turbine industry, a careful examination of assessment
methods for the wind resource is required. Small wind turbines are connected in
parallel with the grid use inverters. As the wind turbine is not always at max
output, a Weighted Average Efficiency for wind inverters is proposed. Pitfalls
associated with developing an accurate weighted average efficiency for an
inverter are identified and this will enable a more accurate sizing of the
inverter for the turbine. The methodology for determining the performance of
inverters and small wind turbines can be applied to any location.
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