1. Most turbines cannot change the direction they're facing. If they're not facing into the wind, they won't turn.
2. Sometimes there is actually TOO MUCH wind. The turbines would risk breaking if they were allowed to turn. So an internal brake is set, preventing them from turning.
These are definitely problems that, if fixed, could allow more power generation from wind.
Unless the winds are absolutely dead calm, which is very rare, a modern, well maintained wind turbine will continue to rotate, albeit very slowly. The blades are designed to efficiently suck out every last drop of wind energy possible.
You may think that there's no real wind to speak about, but the turbine doesn't.
i think so the wheel does not become stuck
2) wind farm produces more energy than needed