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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}As the wind industry continues to grow, it has become increasingly important for wind plant operators to utilise all available data in order to optimise wind plant performance for energy yield and to increase the life of the wind plant. To maximise economic returns, analytical techniques are recommended.
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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}Wind tunnel data can be used to predict turbulent atmospheric flow over complex terrain and can be used to validate numerical models. Thus, physical modelling of atmospheric boundary layer (ABL) flow over hills is useful in many research areas, such as wind energy assessment. But, and it is a big but, the proper quality of physical experiments is the prerequisite.
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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}In the kk-electronic a/s study, sequences of wind velocity events were extracted from some of the measurements recorded by all of the wind turbines in a wind farm. These event sequences were subsequently matched and combined with the physical layout of the wind farm. This enabled travel times of the wind between wind turbines to be computed, and, in turn, wind speed and direction could then be calculated.
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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}Power curves are an essential tool in many aspects of wind power development. From pre-construction energy analysis to operation and maintenance (O&M) diagnostics, representing power output as a function of wind speed is both intuitive and physically significant. For example, power curves are often required as part of the contractual conditions for transferring wind farm ownership. Power curve studies are also used to find the causes of an underperforming turbine.
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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}Choosing between a classic ‘geared’ or a ‘direct drive’ turbine still seems to be a subject for discussion, as outlined in the April/May 2011 edition of Windtech International. In that issue there is a list of wind turbine manufacturers who had just introduced their latest direct drive wind turbine designs at the EWEA Wind Event 2011. This shows just how much interest and confidence there is in this technology. The Korean wind turbine manufacturer STX Windpower B.V.* fully supports this technology, and as a result it has recently introduced its latest direct drive development, the STX 93 2MW.
