18650 rechargeable battery lithium 3.7v 3500mah
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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah

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no. 7 alkaline battery.Wind power power regulation technology

release time:2024-01-11 Hits:     Popular:AG11 battery

  

  Power regulation is one of the key technologies of wind turbines. After the wind turbine exceeds the rated wind speed (12-16m/s), due to limitations in mechanical strength and physical properties such as generator and power electronic capacity, the energy capture of the wind rotor must be reduced so that the power output remains near the rated value. This also limits the load on the blades and the impact on the entire wind turbine, thereby ensuring that the wind turbine is safe and not damaged. There are three main power adjustment methods: fixed pitch stall adjustment, variable pitch angle adjustment and hybrid adjustment.

  ① Fixed pitch stall adjustment method, the whole machine has a simple structure, few parts, low cost, and a high safety factor. The disadvantage is that it relies on the unique structure of the blade, the structure is complex, and the molding process is also difficult. As the power increases, the blades lengthen, and the aerodynamic thrust they bear is large, which weakens the stiffness of the blades and makes the stall dynamic characteristics difficult to control. Therefore, it is rarely used in the power control of wind turbines above the megawatt level.

  ② The variable pitch angle wind turbine can control the speed when starting, and the power can be controlled after being connected to the grid, so that the starting performance and power output characteristics of the wind turbine are significantly improved, and the tower, blades and foundation are improved The impact is much smaller, but the disadvantage is that it requires a more complex pitch angle adjustment mechanism, which requires the wind turbine's pitch angle system to respond quickly enough to the gust of wind in order to reduce the power pulsation caused by wind fluctuations.

  ③The hybrid adjustment method is a combination of the first two power adjustment methods. This method of variable pitch angle adjustment does not require very sensitive adjustment speed, and the power of the actuator can be relatively small.


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