Offshore wind farms drawing electricity from grid to keep turning in icy conditions

Offshore wind farms drawing electricity from grid to keep turning in icy conditions - Telegraph:
"Offshore wind farms are drawing power from the National Grid to keep turning and prevent them icing up in subzero temperatures, it has emerged.
The turbines need to idle slowly when temperatures plunge in calm conditions to stop ice forming and to power hydraulic systems that turn the blades into the wind.
Critics of wind farms, which cost three times as much as conventional power stations per unit of energy produced, said it was “another example of why wind farms are difficult and expensive to manage”, but industry bodies pointed out that all power stations use electricity as well as generating it...."