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Wind turbine repairs scheduled; Five of 10 machines turned off due to defects

It's not just a lack of wind as the reason why some of those wind turbines in the Taconite Ridge wind farm aren't turning. Half of the 10 machines had to be turned off. After a recent routine maintenance check, it was found that five of them had non-structural defects in some of the blades. The affected turbines were shut down and are awaiting repairs, which are expected to go through the end of the year, Amy Rutledge, Minnesota Power communications manager, said Friday.

It's not just a lack of wind as the reason why some of those wind turbines in the Taconite Ridge wind farm aren't turning.

Half of the 10 machines had to be turned off.

After a recent routine maintenance check, it was found that five of them had non-structural defects in some of the blades. The affected turbines were shut down and are awaiting repairs, which are expected to go through the end of the year, Amy Rutledge, Minnesota Power communications manager, said Friday.

"We certainly want the community to know what's going on,'' she said.

Repairs will be starting this week, with a crane being brought in and set up by Friday. Clipper Wind Power of California, the manufacturer, has agreed to get the turbines back in operation as quickly as possible, and at no cost to Minnesota Power or its customers, Rutledge explained.

General contractor for the repairs is IMS Construction, based out of Escanaba Mich., which has a branch office in Eveleth. The crane will be delivered from the Truck Crane Co. in Eagan.

The defect in some of the blades is in the several layers of fiberglass, which are supposed to lay smoothly upon each other. A defect can develop, like a fold in the... more [truncated due to possible copyright]  

It's not just a lack of wind as the reason why some of those wind turbines in the Taconite Ridge wind farm aren't turning.

Half of the 10 machines had to be turned off.

After a recent routine maintenance check, it was found that five of them had non-structural defects in some of the blades. The affected turbines were shut down and are awaiting repairs, which are expected to go through the end of the year, Amy Rutledge, Minnesota Power communications manager, said Friday.

"We certainly want the community to know what's going on,'' she said.

Repairs will be starting this week, with a crane being brought in and set up by Friday. Clipper Wind Power of California, the manufacturer, has agreed to get the turbines back in operation as quickly as possible, and at no cost to Minnesota Power or its customers, Rutledge explained.

General contractor for the repairs is IMS Construction, based out of Escanaba Mich., which has a branch office in Eveleth. The crane will be delivered from the Truck Crane Co. in Eagan.

The defect in some of the blades is in the several layers of fiberglass, which are supposed to lay smoothly upon each other. A defect can develop, like a fold in the laminate, that results in the problem, she added.

Repairs will be made on the ground, and blades will then be hoisted back to their places, in eight to ten weeks.

The $50 million project was completed this summer. It is part of Minnesota Power's efforts to meet a state mandate of 25 percent of energy from renewable sources by the year 2025.

Spokespersons have said in the past that the supplementary power that is generated by wind, which goes to a grid, usually produces power about 20-25 percent of the time.


Source: http://www.virginiamn.com/a...

OCT 18 2008
https://www.windaction.org/posts/17546-wind-turbine-repairs-scheduled-five-of-10-machines-turned-off-due-to-defects
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