Transforming the kinetic energy of the wind into mechanical kinetic energy, and then converting mechanical energy into electrical kinetic energy, is called wind power generation. The principle of wind power generation is to use wind power to drive the blades of a windmill to rotate, and then increase the speed of rotation through a booster engine to drive the generator to generate electricity. According to current windmill technology, a gentle wind speed of approximately three meters per second (the degree of gentle wind) can start generating electricity. Wind power generation is forming a trend around the world because it does not require the use of fuel, nor does it generate radiation or air pollution.
The devices required for wind power generation are called wind turbines. This type of wind turbine can generally be divided into three parts: the wind turbine (including the tail rudder), the generator, and the iron tower. (Large wind power plants generally do not have tail rudders, and only small (including household models) generally have tail rudders.)
The wind turbine is an important component that converts the kinetic energy of the wind into mechanical energy, consisting of two (or more) propeller shaped impellers. When the wind blows towards the blades, the aerodynamic power generated on the blades drives the wind wheel to rotate. The material of the blade requires high strength and light weight, and currently it is mostly made of fiberglass or other composite materials (such as carbon fiber). (There are still some vertical wind turbines, S-shaped rotating blades, etc., which have the same function as conventional propeller blades.)
Due to the relatively low rotational speed of the wind turbine and the frequent changes in the size and direction of the wind, the rotational speed is unstable; So, before driving the generator, it is necessary to attach a gearbox that increases the speed to the rated speed of the generator, and then add a speed control mechanism to maintain stable speed before connecting to the generator. In order to keep the wind wheel always aligned with the wind direction to obtain maximum power, it is also necessary to install a tail rudder similar to a Weather vane behind the wind wheel.
An iron tower is a structure that supports the wind turbine, tail rudder, and generator. It is generally built relatively high in order to obtain a larger and more uniform wind force, while also having sufficient strength. The height of the iron tower depends on the impact of ground obstacles on wind speed and the diameter of the wind turbine, generally within the range of 6 to 20 meters.
Post time: Jul-06-2023
