Extreme cold shuts down North Dakota wind farms, energizing debate on their reliability #ND

By National Wind Watch COURTENAY, N.D. – On any given day, the blades of 100 wind turbines that wrap around the central North Dakota town of Courtenay rotate softly over the prairie, generating enough energy to power 105,000 homes. But when temperatures dropped below negative 20 degrees on Jan. 29, the white towers automatically came to a standstill and ceased to produce electricity. Until the air warmed up beyond that threshold, the turbines remained dormant. Wind turbines here and elsewhere have software that senses when . . .

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