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Best wind turbine controller type

(Summary description)For different types of best wind turbine controllers, the control unit will be different, but the main reason is that the control method is different because of the different structure or type of the generator.

Best wind turbine controller type

(Summary description)For different types of best wind turbine controllers, the control unit will be different, but the main reason is that the control method is different because of the different structure or type of the generator.

Information

For different types of best wind turbine controllers, the control unit will be different, but the main reason is that the control method is different because of the different structure or type of the generator.

best wind turbine controllers

1. Double-fed wind turbine controller
The structure of the doubly-fed wind turbine controller is similar to a wound induction motor. The stator winding is also excited by three symmetrical power sources with a fixed frequency. The difference is that the rotor winding is excited by a three-phase power source with adjustable frequency, which generally adopts alternating frequency conversion. A converter or an AC drive provides low-frequency current.

There are three adjustable excitation parameters for the double-fed wind turbine controller: one is to adjust the amplitude of the excitation current; the other is to change the frequency of the excitation current; the third is to change the phase of the excitation current. By changing the excitation frequency, the speed can be adjusted. In this way, when the load changes suddenly, the speed of the motor is quickly changed, the kinetic energy of the rotor is fully utilized, and the load is released and absorbed, and the disturbance to the power grid is far smaller than that of a conventional motor. In addition, the active power and reactive power can be adjusted by adjusting the amplitude and phase of the rotor excitation current.

The double-fed wind turbine controller controls the low-power components of the inverter circuit through the inverter controller, which can change the amplitude of the rotor excitation current of the double-fed generator. Frequency and phase angle, to achieve the purpose of adjusting its speed, active power and reactive power. It not only improves the efficiency of the unit, but also stabilizes the frequency and voltage of the power grid.


2. Permanent magnet direct drive synchronous wind turbine controller
The permanent magnet synchronous wind turbine controller is directly driven by the variable pitch wind turbine, eliminating the need for a gearbox for speed increase. The output of the wind turbine controller is first converted to direct current through a rectifier, and then the electrical energy is sent to the grid through an IGBT (Insulated Gate Bipolar Transistor) inverter. The control of the operating point of the wind turbine is to control the voltage of the DC link by controlling the current sent by the inverter to the grid, thereby controlling the speed of the wind turbine.

The frequency, voltage, and electric power of the electric energy generated by the generator change with the change of wind speed, which is conducive to maximizing the use of wind energy resources, while the task of constant frequency and constant voltage grid connection is completed by the rectifier and inverter system.

 The shortcomings of the permanent magnet direct drive synchronous generator system are: high requirements for the performance stability of the permanent magnet material, and the increase of the weight of the motor. In addition, the capacity of the IGBT inverter is relatively large, and it is generally necessary to select more than 120% of the rated power of the generator.

In addition to controlling the generator to "get maximum energy", the best wind turbine controller also enables the generator to provide high-quality electrical energy to the grid.

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