Advantages: Starts with just a breeze. 2 Strong winds will not overload. 3 is good for speed regulation. 4 is the best choice to maintain normal power generation.
Disadvantages: 1. The mechanical structure of the variable pitch is complex, and the servo mechanism needs to be fed by wind detection. 2. The weight of the machine head increases. 3. The demand for maintenance force increases and the maintenance cost increases.