Perceptive readers will have noticed the little red graph on the right plunge to zero after the big wind we had on 9th January. This was due to my AWP windmill plunging to the ground with a broken alternator shaft. Yesterday I was pleased to get it back in action.
This would have happened a lot sooner if I had not had a lot of neighbours’ windmills to fix as well. Out of 35 windmills up and running on the night of the storm, roughly 25% failed, many of them pretty catastrophically. It’s almost exactly ten years since the last big wind like this which had a similar effect.
Most of the wind turbines ran through the night unscathed. Some had the short circuit brake on. It’s interesting that the failure rate of the braked turbines was slightly higher than the failure rate of those that were left running. Failure rate of commercially manufactured turbines (Ampair, Proven) was similar to or higher than local manufactured ones.