Why do wind turbines use asynchronous generators? What is the principle of wind power generation?

Wind energy is a clean energy. Wind power generation is actually the process of converting wind energy into mechanical energy, and then into electrical energy. The instrument that converts wind energy into electrical energy is a wind turbine. Why do wind turbines use asynchronous generators? How many kilowatt-hours of electricity are generated by one wind turbine? These are not common in our daily lives, but it is necessary to understand them.

Contents of this article

1. Why do wind turbines use asynchronous generators?

2. What is the principle of wind power generation?

3. How many kilowatt-hours of electricity does a wind turbine generate?

Why wind turbines use asynchronous generators

Because the wind is unstable. Synchronous motors are used in thermal power, hydropower and nuclear power. In this case, the speed of the rotor can be controlled.

Asynchronous generator is an AC generator that uses the interaction between the rotating magnetic field of the air gap between the stator and the rotor and the induced current in the rotor winding. It is also called an induction generator based on its working principle. The speed is slightly higher than the synchronous speed. The output power increases or decreases with the slip rate. It can be excited by the power grid or self-excited by a power capacitor.

What is the principle of wind power generation?

A wind turbine is a power machine that converts wind energy into mechanical work, also known as a windmill. In a broad sense, it is an energy-utilizing machine that uses the atmosphere as a working medium.

The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then increase the speed of rotation through a speed increaser to drive the generator to generate electricity. According to current windmill technology, it can start generating electricity with a breeze speed of about three meters per second.

How many kilowatt-hours of electricity does a wind turbine generate?

The wind turbine is 1500kw, and when fully powered, it rotates about 17 times per minute. If you do the math, one rotation generates 1.47 kWh of electricity. A 1.5MW wind turbine rotates about 1800 times per minute and generates 1500 kWh of electricity per hour. The impeller rotates about 18 times per minute, so the wind force is directly related to the capacity of the unit.