The wind power gearbox is one of the core components of the wind turbine, and the wind power gear is a component in the wind power gearbox. The function of the wind power gearbox is to convert the low-speed rotation generated by the wind wheel into high-speed rotation in order to drive the generator to generate electricity. The quality and performance of wind power gears directly affect the stability and life of wind power gearboxes.
What is the function of the wind turbine nacelle manufactured by Goldwind Technology?
The gearbox of wind power is also called the speed increase box and is used in doubly-fed generator systems. Direct-drive wind turbines do not have gearboxes. . The generator is doubly-fed, and a generator with two pairs of magnetic poles requires a rotational speed of about 1750 to reach the rated power of the generator. The maximum spindle speed is 20r/min. The required speed is reached through the speed increase box. The coupling is a bridge connecting the gearbox and the generator shaft. It has a certain degree of toughness. It is not made of steel, but should be made of fiberglass. Both perform their duties and are used in conjunction.
Which one is better, direct drive or double-fed wind turbine?
The person above said it wrong! Sinovel is not a state-owned enterprise, but a joint-stock company! I just signed it this year, and the three parties said it was a joint-stock company! ! Goldwind units have direct-drive units, while Sinovel units are double-fed. (1) Generator: Sinovel Wind Power’s doubly-fed generator sets use doubly-fed asynchronous generators, and Goldwind Technology’s direct-drive units use low-speed multi-pole permanent magnet generators. Permanent magnet generators use rare earth permanent magnet materials. Rare earth materials are scarce resources and are likely to be used as national strategic reserve resources in the future. Therefore, prices are likely to skyrocket and the prospects are highly uncertain. The permanent magnet generator has a large number of magnetic poles, and its volume and weight are much larger than that of a doubly-fed generator. Moreover, the design technology of multi-pole permanent magnet generators is not yet mature in China, and there are greater risks. Goldwind Technology uses rare earth permanent magnet generators, which suffer from demagnetization and easy corrosion. The doubly-fed asynchronous wind motor used in Sinovel Wind Power's doubly-fed generator units has the advantages of mature and reliable technology, low cost, and light weight, and has been proven and adopted by the top international complete machine manufacturers. (2) Frequency converter: The direct drive unit uses a full-power frequency converter, which has large capacity and is expensive, and the frequency converter generates large harmonics. In the doubly-fed unit, only the slip power passes through the frequency converter, which gives full play to the advantages of a small-sized doubly-fed generator, so the frequency converter has small capacity, low price, and the harmonics of the unit are small. (3). Gearbox: Direct drive units do not use gearboxes. The wind wheel directly drives the generator rotor to rotate. Doubly-fed units use gearboxes to increase the speed of the wind wheel. The gearbox is a potential failure point and may cause higher maintenance costs. High, but the gearbox manufacturing technology has matured and the failure rate is already very low.
Doubly-fed wind turbines are currently the mainstream on the market, and the technology is relatively mature. However, they have many shortcomings, especially the gearbox, which increases the complexity of the system and maintenance costs.
Direct-drive wind turbine is an emerging type of generator that eliminates the need for a gearbox and can achieve better power generation efficiency at low wind speeds.
Currently, multinational giants are developing direct-drive wind turbines. And a 1.5MW direct-drive wind turbine has been put into mass production.