How do we see these windmills that turn around day and night to convert wind energy into electricity?
Like the wings of an airplane, the principle of wind power generation is to use the wind to drive the rotation of the windmill blades, which in turn drives the generator to generate electricity. The blades of wind turbines seem to give people a small feeling from the ground, but in fact these blades are large, ordinary wind turbine blades are more than 40 meters long, and the current maximum wind turbine blade length has exceeded 100 meters, far exceeding the large passenger aircraft. The length of the wing. In fact, the wind does not “push” the moving vane blades, but because the shape of the cross-section of the vanes is up and down asymmetrical, the flow rate is large when the wind passes over the vanes, and the flow velocity below is small. This causes the pressure above the blade to be small, the pressure below it to be strong, and the blade to form a pressure difference between the upper and lower blades. This pressure difference generates lift and causes the wind wheel to rotate.
How wind turbines ensure power generation To convert wind energy into electrical energy, it is not enough to rely on a unique airfoil design. The wind turbines of the wind turbine must meet the wind to generate electricity. When the fan is working, first find the direction of the wind through the wind vane, and then rotate the nose to the direction that the wind is blowing through the yaw system. The wind is very complicated. The wind machine often measures the wind direction and rotates the nose to meet the wind, so that the wind turbine can better match the wind characteristics. As the wind angle increases, the power generation will increase rapidly. In addition, the fan blades also rotate, helping the fan to better adapt to the size of the wind.
Direct-drive permanent magnet technology The traditional wind turbine uses the wind to drive the windmill blades to rotate, and then the speed of the rotation is increased by a plurality of gear sets such as a speed increaser to drive the generator to generate electricity. This is a very long transmission process, and energy is inevitably lost during transmission.
The direct-drive permanent magnet technology eliminates the complicated transmission structure such as the gear box, greatly reduces the loss, improves the power generation efficiency, and ensures the reliability of operation. The rotor of direct-drive permanent magnet power generation is composed of more than 1300 magnets. The core components are composed of rare earth materials, which can generate powerful magnetic fields without consuming any electric energy, ensuring the powerful power generation capacity of the unit. When the wind blows the blade, the coil continuously cuts the magnetic field lines to generate electrical energy. This is why wind energy is converted into electricity.
Incorporating into the grid The electricity generated by the wind turbine can be directly sent to the grid for people to use? In order to safely integrate wind power into the grid for people to use, the current on the fan side and the current on the grid side need to be processed by the electric box. The voltage generated by the fan is constantly changing, and the grid has strict requirements on the incoming voltage. At this time, a transformer is needed to process the wind power that has already been generated. After processing, all units can output a uniform voltage, and wind power can be safely transmitted.