Yes, the area is the area swept by the wind wheel.
You mean the wind wheel doesn't occupy the entire area of the circle at the same time? Actually, it doesn't matter. This effect is included in the conversion efficiency.
The formula for calculating the power of a wind turbine is:
P=cp*(0.5*rho*(v**3)*pi*r*r)< /p>< p >cp is the conversion efficiency 0.2
The calculation shows that r is the length l of the blade you mentioned is 9.9348 m
The frequency and voltage of the wind power generator are always unchanged. As the blade speed increases, the generated power and current increase, and as the blade speed slows down, the generated power and current are decreasing.
Wind power generators generate alternating current and do not need to be stored when operating on the grid. There is more absorption online and less replenishment online. If there is nohas no grid-connected operation, the alternating current must be converted to direct current and stored in the storage battery. The storage battery must then be converted to alternating current for power supply. The storage battery stores the battery when it is long and. Replenishes the battery when it is short to ensure the user's electricity.
Using battery storage is a powerless approach that cannot be connected to the grid. When conditions permit, using battery storage increases the cost.