POWER August 2015 - 54

WIND POWER
2. Quality mishap. Invenergy's 94-MW Orangeville Wind Farm in Wyoming County, N.Y.,
saw a blade break at one of its 58 GE 1.6-100 turbines in November 2013, just months before it
was fully commissioned in 2014. GE later reportedly blamed the blade break at this wind farm
and another in 2013 at DTE Energy's Echo Wind Park in Michigan to a spar cap manufacturing
anomaly. Courtesy: WindAction
can also be used as a model for procurement
specifications for other applications,
said Errichello. If the application requires
very high reliability, or if the consequence
of failure is high, a user should commission
a due diligence review of the design
performed by an independent third-party
expert, he suggested.
Bracing for the Blades
Blade failures often occur without warning-
and they are costly and catastrophic. GE, for
example, saw a series of six blade breaks
(Figure 2) between mid-2012 and the end of
2013 on 1.6-MW turbines-either GE's 1.6100
model or 1.6-82.5 model-in Illinois,
Michigan, and New York.
Though the company did not respond to
repeated queries from POWER for this article,
it was widely reported at the time that
at the end of 2013, GE notified the owners
of all 1,087 GE 1.6-100s installed around the
world of the blade breaks. It later said it had
identified a " suspect population " of roughly
1.5% of total blades in its 22,000 wind turbine
fleet. Once it identified the root cause (some
breaks were linked to a spar cap manufacturing
anomaly, one to a disrupted cure in carbon
CIRCLE 24 ON READER SERVICE CARD
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POWER August 2015

Table of Contents for the Digital Edition of POWER August 2015

Contents
POWER August 2015 - Cover1
POWER August 2015 - Cover2
POWER August 2015 - Contents
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