There are very few applications of DC wind turbines. The most common models are constant-speed and constant-frequency squirrel-cage induction generators, variable-speed and constant-frequency doubly-fed induction generators, and variable-speed and variable-frequency direct-drive permanent magnet synchronous generators. 1. Constant speed and constant frequency squirrel cage induction generator Constant-speed constant frequency (CSCF) wind turbine is a generator that […]
Renewable energy electric power generation technologies engineering and application
The basic principles and implementation methods of renewable energy engineering using various renewable energy technologies for electric power generation are described
Renewable energy electric power generation technologies engineering and application
The basic principles and implementation methods of renewable energy engineering using various renewable energy technologies for electric power generation are described
Traditional wind turbine and electromagnetic induction mechanism
The wind turbine is another core component of the wind power generation system. Its basic function is to operate under the driving of a rotating wind turbine, and then convert the mechanical energy converted by the wind turbine into electrical energy. Traditional wind turbine Traditional wind generators are directly connected to the grid or supply […]
Power control and system of wind turbines
Power control of wind turbine Figure 1 shows the relationship curve between the power of the wind turbine and the wind speed. With the help of this graph, the comprehensive performance of the wind turbine can be evaluated. Obviously, when the wind speed is less than the cut-in wind speed, the wind turbine will stop; […]
The relationship between wind turbine power and working wind speed
Generally, a wind turbine converts the captured wind energy into mechanical power output. The expression is Pm=Cp Pw=0. 5CpρA1vw3 （1-1） In the formula: Pm represents the output power of the wind turbine (W); Cp is the phoenix energy utilization coefficient (a parameter that characterizes the ability of the wind turbine to capture wind energy); ρ represents the air density […]
The efficiency, tip speed ratio and volume ratio in the working principle of wind turbines
Wind energy utilization factor and wind turbine efficiency The theory shows that when all the kinetic energy of the air close to the wind wheel is absorbed by the rotating wind wheel blades, the air behind the wind wheel will stop flowing, but this is obviously impossible. Therefore, even if the wind energy that passes […]
Force action, airfoil and angle of attack in the working principle of wind turbines
After understanding the basic types of wind turbines, we then analyze their working principles. From the perspective of physics, its working principle is: when the wind blows on the wheel plane of the wind turbine, the wind wheel will be thrust by the wind, and then torque will be formed, and the torque will promote the […]
Basic types of wind turbines
1. Horizontal axis wind turbine At present, the vast majority of grid-connected wind turbines use horizontal-axis wind turbines, and their shape and structure are shown in Figure 1. The rotor of the wind turbine is installed on the top of the tower where the wind is strong and the turbulence is small. At the same […]
Wind power generation technology and its common forms
The use of wind energy is to convert the kinetic energy of the wind into mechanical energy, and then into other forms of energy. Mankind has been using wind energy for a long time, and there is the word “fan” in the oracle bone scripts of the Chinese dynasty, which shows that China began to […]
Wind energy density and distribution of wind energy resources in China
Wind energy and wind energy density Wind is flowing air, and moving air has kinetic energy. This kinetic energy is called wind energy. According to the above discussion on the formation of wind, solar radiation is the most important source of wind energy. Studies have shown that the total solar radiation power received by the […]
The description of wind and the distribution of earth’s wind energy resources
Description of wind Wind is a moving airflow and a vector. People generally describe it with three parameters: wind direction, wind speed, and wind level, as follows: (1) Wind direction. In daily life, people are always accustomed to calling the direction the wind blows as wind direction. If the wind is blowing from the south, […]