Speed of a wind turbine If a wind turbine is spinning too slowly, most of the wind just passes through the blades and therefore wasting the energy that it could be producing. On the other hand, if a wind turbine is spinning too fast it could one cause mechanical damage; and two create a "wall" against the wind to safely spin the turbine to create electricity. Most wind turbines have a maximum speed that they can work at properly. They usually shut down if wind speeds get higher than about 55mph Conversely, if the power becomes too low, the pitch mechanism will pitch the blades back into the wind.
Yaw mechanism - The yaw mechanism turns the nacelle of the turbine, so that the rotor is perpendicular to the direction of the wind. In most large-scale turbines, data from a wind vane is processed by a control system, and the yaw mechanism will rotate the nacelle until the rotor is perpendicular to the wind. When the rotor is pointing in the opportune direction, the brake will engage and keep the nacelle pointing in that direction.
So what happens to all this generated electricity? Well, it can all be used on site, it can be sold back to the Distribution Network Operator DNO or it can be stored in batteries. All three options have benefits and the most appropriate one will depend on your circumstances, however a combination or all three can be implemented.
If you would like assistance with a wind turbine project, you can talk to us at Action Renewables, and we can provide you with some expert advice. Enter your details below to sign up to our mailing list, for details of news, events and industry updates. How does a wind turbine work?
Wind Wind turbines are designed to start operating at about kilometres per hour - a gentle or moderate breeze. Where wind meets the blade As the wind blows towards the turbine, it encounters an obstruction - the turbine blade.
The gearbox The gearbox increases the rotational speed of one gear by connecting to a gear with a smaller radius. The generator Inside the generator is where wind is converted to electrical energy. Here is how it works; The rotor rotates at the same speed as the blades and is connected to a low-speed shaft which rotates at the same speed.
To increase the speed the shaft is rotating, the low-speed shaft is connected to a gearbox. The rotational speed of the low-speed shaft is increased substantially by the gearbox which is connected to the high-speed shaft.
The high-speed shaft rotates much faster than the low-speed shaft. The high-speed shaft is attached to a coil of copper known as an armature inside the generator. The armature rotates at the same speed as the high-speed shaft.
The armature is surrounded by a magnetic field, created by magnets within the generator. As the armature rotates through the magnetic field, a current is induced in the copper coil. It is the ratio between the rotational speed of the tip of the blade and the actual velocity of the wind. Although a higher ratio is desirable, it shouldn't be to the detriment of the motor.
Should it become over-stressed it will become noisy and possibly fail. The TSR of a wind turbine is particularly important to measure its efficiency and capability of producing maximum energy.
A high ratio where blades move too fast means they are passing through the turbulence of the previous blade. This second-rate wind decreases efficiency. Although it might seem most viable to position wind turbines in regions where the wind speeds are highest, this isn't necessarily the case.
Turbines produce the greatest amount of renewable energy when placed in areas with regular constant wind, rather than occasional high winds. The air density of a particular locale is a combination of altitude, pressure, and temperature. Denser air applies more pressure to rotors resulting in higher power output. Larger blades have a greater surface area enabling them to capture more of the wind's kinetic energy.
Wind turbines are designed to spin at high speeds to harvest the optimum amount of kinetic energy to convert to electric energy. Multiple inbuilt safeguards prevent them from spinning too fast when they may become damaged and not supply their full potential of power. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. How Fast do Wind Turbines Spin? Last Updated September 9,
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