Wind Power

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Power generated by a wind turbine largely depends on wind speed. In a wind farm in which the turbines experience the same wind speeds but different shapes, such as turbulence, to the wind profile, a turbine will produce different amounts of power. Two researchers say that this variable power can be predicted by looking at atmospheric stability.
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A new superconducting current limiter based on YBCO strip conductors has been installed at a power plant. At the Boxberg power plant of the Swedish company Vattenfall, the current limiter protects the grid for own consumption that is designed for 12,000 volts and 800 amperes against damage due to short circuits and voltage peaks.
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A new geospatial application developed by the DOE’s National Renewable Energy Laboratory (NREL) allows users to map potential renewable energy resources in the United States. The interactive tool is called RE Atlas, and is free to use and available online.
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A miniature turbine measuring just 10 inches high is helping a research team led by Hui Hu - an Iowa State University associate professor of aerospace engineering - understand how hills, valleys, and the placement of turbines affect the productivity of onshore wind farms.
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Powerex (Youngwood, PA) has introduced IGBTs from 300A/1200V - 800A/1200V in conventional packages, allowing users an easy upgrade path for increased system ratings and/or improved reliability due to the increased allowable operating junction temperature. Applications include motor drives, fuel cells, and wind and solar inverters.
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Artificial photosynthesis is the process of converting carbon dioxide gas into useful carbon-based chemicals - most notably fuel or other compounds usually derived from petroleum - as an alternative to extracting them from biomass. An Illinois research team has produced a catalyst that improves the process.
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Smart Power Systems, Inc. (Baltimore, MD) has developed a 25-kW single-phase bi-directional inverter. The SPS-Pavan 25 features minimum harmonic point tracking to reduce harmonic distortion and a unity power factor operation while drawing or supplying power into a single-phase grid.
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