Grid-connection of variable-speed and constant-frequency wind turbine For a variable-speed constant-frequency controlled wind power generator using a synchronous generator, the generator armature winding is connected to the power grid through a converter. When the wind speed changes, in order to achieve the maximum wind energy capture, the electromagnetic torque of the synchronous generator needs to […]
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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
Grid-connected conditions and methods of synchronous wind turbines
Grid-connected conditions of synchronous wind turbines The circuit of a synchronous wind generator set running in parallel with the power grid is shown in Figure 1. In the figure, the stator winding of the synchronous generator is connected to the power grid through a circuit breaker, and the rotor field winding is controlled by an […]
Wind turbine operation control
The control system of the wind turbine is an integrated control system. Take the grid-connected wind power generation system as an example. It monitors the grid, wind conditions, and operating data to control the grid-connected and disconnected wind turbines to ensure safety and reliability. Under this premise, the control system must not only optimize the […]
Operation of yaw system of wind turbine
Since the rotation of the wind turbine is driven by the wind, it is not difficult to imagine that only when the wind blows vertically to the rotating surface of the wind wheel, the wind turbine can obtain the maximum rotational torque and output the maximum mechanical power. As we all know, the wind in […]
Start of wind turbine
Normally, when the wind speed v>3m/s but not enough to drag the wind turbine to the cut-in speed, the wind turbine rotates freely and enters the standby state. In the standby state, except that the generator is not connected to the grid, the unit is actually in working state. At this time, the control system […]
The overall structure and working status of the wind turbine
The overall structure of the wind turbine A wind turbine is a device that converts the kinetic energy of the wind into mechanical energy through a wind turbine, and then into electrical energy through a generator. The wind turbine blades generate aerodynamic force under the action of the wind to rotate the wind wheel, convert […]
The latest development of wind turbines
Brushless double-fed generator Figure 1 shows the schematic diagram of the brushless doubly-fed generator. Two sets of independent three-phase windings are placed in the stator core slots of the generator. One set of windings is directly connected to the grid and is a power winding. The outlet terminal is denoted by A, B, C, and […]
Mainstream models of wind turbines
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 […]
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; […]