Tag: steel tower
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Type of towers – stiff, soft or soft soft?
In the last month I spent a lot of time discussing about “soft soft” towers. But what does it exactly means? Steel tower for wind turbine are classified as stiff, soft, or soft soft based on the relative natural frequencies of tower, rotor and blades. You obviously want to avoid that your tower is excited…
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Wind turbine towers – the bigger the better
It looks like the trend in the business is to go as high as possible. The places with the best wind conditions have been already used in the first 20 something years of the wind industry. Now it’s time to work with low wind sites – and probably, repower the older wind farms. I consider…