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Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
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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