Defects at Iron Range wind farm being fixed

MINNESOTA - A wind farm on Minnesota's Iron Range was fully online this summer, but seven of the 10 wind turbines have been shut off in recent months for repairs.

For that reason, Taconite Ridge wind farm isn't producing as much electricity as Minnesota Power anticipated.

The $50 million project overlooks U.S. Steel's Minntac mine and covers about 450 acres.

This fall, inspectors with the turbine manufacturer discovered defects in several of the turbines' blades, and repairs have taken longer than anticipated, said Amy Rutledge, a spokeswoman for Minnesota Power.

"We had hoped they would be wrapped up by mid-December, but we've had a few issues with the weather," Rutledge said. Windy weather prevented the manufacturer from removing the rotors as quickly as they'd have liked, she said.

Repair crews for manufacturer Clipper Windpower hope all 10 turbines will be working by the end of January, Rutledge said. The delay won't affect Minnesota Power's electrical supply.

The defects, which aren't considered structural, are "wrinkles" in the fiberglass blades that must be fixed, said Taconite Ridge project manager Andrew Remus.

"If we leave them the way they are, without taking any action, they will affect the way the blade operates," Remus said. "The blade is all one piece, and you need it to be perfect."

Some of the blade wrinkles will be sanded down and re-laminated, Rutledge said. Others will get a patch — a repair similar to using putty to repair a dented car, she said.

Taconite Ridge is the first large-scale wind farm in northern Minnesota. At full capacity, the turbines could produce 25 megawatts of electricity, which is enough to power 8,000 homes.

Minnesota Power is using the wind farm to increase its renewable energy resources and meet the requirements of a new state mandate for electrical utilities to produce 25 percent of their electricity from renewable sources by 2025.

Related News

power lines

Buyer's Remorse: Questions about grid modernization affordability

WASHINGTON - Utilities’ pursuit of a modern grid to maintain the reliability and safety pillars of electricity delivery has raised a lot of questions about the third pillar — affordability.

Utilities are seeing rising penetrations of emerging technologies like distributed solar, behind-the-meter battery storage, and electric vehicles. These new distributed energy resources (DER) do not eliminate utilities' need to keep distribution systems safe and reliable.

But the need for modern tools to manage DER imposes costs on utilities that some regulators, lawmakers and policymakers are concerned could drive up electricity rates.

The result is an increasing number of legislative and regulatory grid modernization…

READ MORE

IEA warns fall in global energy investment may lead to shortages

READ MORE

china hydropower

China to build 525-MW hydropower station on Yangtze tributary

READ MORE

electric meter

Nova Scotia regulator approves 14% electricity rate hike, defying premier

READ MORE

russian-strikes-on-western-ukraine-cause-power-outages

Russian Strikes on Western Ukraine Cause Power Outages

READ MORE