Wind turbine sizes and ratings are still moving steadily upwards, with 600 kW power ratings now common and the average rating of Danish turbines sold increasing from 374 kW in 1995 to 495 MW in 1996 so far. Most machines still have three blades, induction generators and tubular towers, reflecting the dominance of the Danish industry. Variable speed designs are making headway, but not yet a breakthrough. Noise levels are falling, reflecting environmental concerns.
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