It depends on the power of the wind turbine. If the power is large, the electricity production will be significant; if the power is small, the electricity production will be low. China's largest wind turbine is 2 megawatts, with daily electricity production equivalent to 11 tons of high-quality coal.
The generator turns one or two thousand revolutions per minute, while the wind turbine only generates one thousand kilowatt hours of electricity per hour. This is directly related to the unit's capacity.
For example, in a 1.5 megawatt wind turbine, the generator spins about 1,800 revolutions per minute, producing 1,500 kilowatt hours per hour, and the turbine spins about 18 times per minute.
This is related to factors such as fan type and capacity and generator speed.
For example, for a 2 MW direct drive wind turbine, its permanent magnet generator reaches the rated speed, for example 17 tburs per minute, and it takes 60/17 = 3.5 seconds to complete one lap. If a 2 MW wind turbine generates electricity continuously for 1 hour at rated speed, the amount of electricity generated in 3.5 seconds is 3.5*2000/3600 = 1.94 kilowatt hours, or the amount of electricity generated in one revolution.
For dual-feed fans, this is also related to the gearbox reduction ratio.
No, let me tell you basically, the fan is 1500 kW. If it is full, it will spin at 17 revolutions per minute. If you do the math, one rotation equals 1.47 kilowatt hours of electricity. This is only an approximation and is not exact.
In wind power generation, there are generally two types of wind turbines, horizontal wind turbines (the main shaft is installed vertically) and vertical wind turbines (those that are installed vertically). usually seen running all the time)< /p >
The latter is more widely used, whilethat the first is generally only used on small windmills
The blades of the windmill rotate after being blown by the wind. When it reaches a certain speed, the measuring part measures whether the speed is sufficient. Because the windmill is rotating at this time, it drives the gear phase (specifically, an acceleration gearbox) to slightly increase the speed.
Then behind is a asynchronous generator
, it should be noted here that wind turbines generally use asynchronous generators instead of synchronous generators, because they cannot guarantee that the output frequency is equal to the rotation speed, and the rotation speed of the windmill is constantly changing
This results in For an asynchronous generator, the faster it rotates, the greater the current will be. The slower it is, the lower the current will be when the rotation speed is too high. little, the detection circuit detects it then separates the connection between the generator and the power grid, because if it is not separated, the generator rotor speed will decrease if it is lower than the synchronous speed, it becomes a motor< /p. >
The asynchronous generator is actually an asynchronous motor, there is no difference.
In addition, wind turbines produce electricity due to the nature of asynchronous generators. Large wind turbines usually have an inverter power supply to initialize the rotating magnetic field of the generator, while some rely on synchronous generators, but most of them. come from the reverse power transmission from the power grid
That is, when the speed reaches a certain level, that is, once the speed is higher than synchronous speed, the three-phase power supply is connected to the generator, and the power grid sendsenergy to the generator. Since the rotor rotates at a speed higher than the synchronous speed, when rotating it does not consume active power but consumes reactive power, but it emits active electrical energy and then generates electricity .
It should be noted that the asynchronous generator must require an external power supply to initialize it.
This allows it to establish a rotating magnetic field, otherwise it cannot produce electricity. but if its external power supply is 220V
50HZ, then as long as its rotation speed exceeds the synchronous speed, the faster it rotates, the greater the current it outputs. Voltage and frequency will not change and are. consistent with the electrical network which provides it with the initial power