2355mm. Wind power gearbox is the main device for wind energy transmission. The appearance size of 8MW wind power gearbox is generally 2355mm. The wind turbine gearbox is an important mechanical element. Its main function is to transmit the power generated by the wind wheel under the action of the wind to the generator and obtain the corresponding rotation speed.
The largest is 5 MW, one in Denmark and one in China. Generally, 2 MW, 1.5 MW or less 0.8 MW are used in China.
Formula for calculating electrical power: P=W/t =UI.
In a purely resistive circuit, according to Ohm's law U=IR and substituted by P=UI, we can also obtain: P=I2R=(U2)/R.
In dynamics: Power calculation formula: P=W/t (average power); P=Fvcosα (instantaneous power).
Detailed information
When the wind turbine produceselectricity, it must ensure that the output frequency is constant. This is very necessary for both grid-connected wind power generation and wind-solar hybrid power generation. ?
To ensure that the frequency of wind power is constant, one solution is to ensure a constant speed of the generator, that is, a constant speed and constant frequency operating mode , because the generator is driven by the generator. wind turbine through the transmission device, this method undoubtedly requires a constant speed of the wind turbine, which will affect the wind energy conversion efficiency.
Another way is to change the speed of the generator according to the wind speed and ensure that the frequency of the output electrical energy is constant by other means, i.e. i.e. constant frequency and variable speed operation. The utilization coefficientn of wind energy from the wind turbine is related to the blade tip speed ratio (the ratio of the linear speed of the turbine tip to the wind speed). There is a certain blade tip speed ratio that causes Cp to reach the maximum value.
Baidu-Wind Encyclopedia