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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 USA there is understandably considerable attention given to the ‘supply chain’ of components and services that come together to create wind turbines and projects. Shepherd Advisors examines this flow of products and services from a different angle – what we call the ‘buy chain’. We seek to understand what drives buying decisions at various links in the chain from raw materials to finished product. Our aim is to gain more robust knowledge of ‘Who is buying what?’, ‘Why are they buying?’ and ‘How they are buying?’ In other words, we are interested in the circumstances surrounding buyers’ purchase decisions, and the key factors driving them.
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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}An extensive wind turbine blade testing programme at Risø DTU has led to numerous conclusions regarding the structural design of wind turbine blades and has drawn attention to failure mechanisms and loading configurations that are often not required in design and certification tests (see reference 1).
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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}Utility grade wind turbines are now so technologically advanced that they have become competitive with today’s conventional energy sources. An investigation of the patent landscape has been conducted to see what technological trends have emerged thus far, and what might be in store for the future of wind turbine technology.
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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}Airborne wind energy is a name for systems generating energy from the wind with a structure that is supported by air instead of the tower of a typical wind turbine.
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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}Because of the significance of wind power in markets and systems such as ERCOT and MISO (see Figure 1), there is a need to revisit current electricity market designs and traditional procedures for system operations in the light of the increased uncertainty and variability from wind power generation. System operators in the USA and abroad are currently adjusting their operational procedures and market rules to accommodate wind power’s increasing importance. Different solutions are being tested and implemented, but it will take time before consensus emerges on the main principles of new market structures that better address the implications of increasing reliance on wind power and other renewable energy resources.
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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}Large Historical Differences in National Grid Codes
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{access view=!registered}Only logged in users can view the full text of the article.{/access}{access view=registered}Clue one: Driving cross country in the winter of 1992, I saw my first wind farm along a vast stretch of cold, barren Wyoming. It was one of those clear, dry, hyper-cold days when the snow blows like dust across the highway, melts and instantly re-freezes into perfectly formed ice rails where warm truck tyres had passed only moments before.
