A review has been conducted of electrical winding failures in wind turbine generators. It has been published in the Electrical Insulation Magazine, Volume 28 number 4, July / August 2012 [A publication of the Dielectrics & Electrical Insulation Society of IEEE].
The article provides a review of failure modes in more than 1,200 wind turbine generators repaired or replaced since 2005.
The review has found that 70% of failures in generators of 1 to 2 MW are bearing failures. The review recommends condition monitoring and periodic electrical trending tests to help predict and plan for outages.
If there are benefits for wind turbines with condition monitoring, in what other areas of the power system could condition monitoring be improved?