Dynamic stability test system for rotating speed of fan

Abstract

The utility model discloses a fan rotating speed dynamic stability test system, comprising a power supply used for providing electric power; the variable speed motor is electrically connected with the power supply, receives the electric power and drives a connected power generation motor, so that the power generation motor generates a motor rotating speed and outputs a motor rotating speed signal according to the motor rotating speed; the rotating speed adjuster is electrically connected with the variable-speed motor and used for adjusting the rotating speed of the motor; and the rotating speed signal output end is electrically connected with the power generation motor and outputs the motor rotating speed signal. According to the utility model, the rotating speed of the wind power generation motor is simulated through the innovative simulation controller and the data acquisition system, high-precision rotating speed control and instant data analysis are realized, various load conditions can be simulated, and good expansibility and safety are achieved.

Description

Technical Field

[0001] This utility model relates to a testing system, and more particularly to a dynamic stability testing system for wind turbine speed. Background Technology

[0002] Please see Figure 3 , Figure 3 This is a schematic diagram of a conventional wind power generator system. The wind power generator system 2 is currently widely used in the field of power generation technology. It uses wind power to drive the blades 21 of the wind power generator 22 (referred to as the wind turbine) to rotate, so that the wind power generator 22 generates electricity Pm, which is fed into the connected power grid E.

[0003] However, since the rotational speed of the blades 21 of the wind turbine 22 cannot be fixed, the output voltage frequency of the wind turbine 22 also cannot be kept stable. Therefore, a frequency converter 23 is needed to ensure that the wind turbine 22 outputs a stable frequency voltage, and the output voltage frequency is adjusted in real time according to the rotational speed of the wind turbine 22 to ensure that the power quality Pm generated by the wind turbine 22 is the same as the power quality generated by the power grid E. Therefore, how to stabilize the rotational speed of the blades 21 of the wind turbine 22 and ensure that the wind turbine 22 outputs a stable frequency voltage will affect the quality of the power Pm generated by the wind turbine 22.

[0004] Therefore, how to provide a dynamic stability testing system for wind turbine speed has become an urgent research topic. Utility Model Content

[0005] This utility model discloses a dynamic stability testing system for wind turbine speed, comprising a power supply, a variable speed motor, a speed regulator, and a speed signal output terminal. The power supply provides electrical power. The variable speed motor is electrically connected to the power supply and, upon receiving power, drives a connected generator motor, causing the generator motor to generate a motor speed and outputting a motor speed signal based on that speed. The speed regulator is electrically connected to the variable speed motor to adjust the motor speed. The speed signal output terminal is electrically connected to the generator motor and outputs the motor speed signal.

[0006] As described above, the wind turbine speed dynamic stability test system of this utility model provides the connected wind turbine with the speed generated by the wind turbine, replacing the blade rotation of the wind turbine, and dynamically adjusts the motor speed of the variable speed motor to stably output the motor speed signal to the wind turbine, thereby further stabilizing the power quality of the wind turbine. Attached Figure Description

[0007] Figure 1 This is a block diagram of the dynamic stability testing system for fan speed of this utility model;

[0008] Figure 2A This utility model of a dynamic stability testing system for wind turbine speed includes a speed display, a speed detector and a power switch.

[0009] Figure 2B for Figure 2A A schematic diagram of the wiring connections; and

[0010] Figure 3 A schematic diagram showing the connection of an existing wind turbine to the power grid. Detailed Implementation

[0011] Please see Figure 1 This is a block diagram of the dynamic stability testing system for wind turbine speed of this utility model. The dynamic stability testing system 1 for wind turbine speed includes a power supply 11, a variable speed motor 12, a speed regulator 13, and a speed signal output terminal 14. The power supply 11 provides power. The variable speed motor 12 is electrically connected to the power supply 11, and after receiving power, drives the connected generator motor G, causing the generator motor G to generate a motor speed, and outputs a motor speed signal according to the motor speed. The speed regulator 13 is electrically connected to the variable speed motor 12 to adjust the motor speed. The speed signal output terminal 14 is electrically connected to the generator motor G and outputs the motor speed signal.

[0012] As described above, when the speed of the variable-speed motor 12 fluctuates and becomes unstable, the speed regulator 13 controls the variable-speed motor 12 to generate a stable motor speed for the generator motor G. This allows the generator motor G to output a voltage at a stable frequency based on the motor speed, further enabling the generator motor G to stably generate electricity for the power grid. In other words, when the change in motor speed exceeds a preset value, the speed regulator 13 generates a speed adjustment signal to the variable-speed motor 12 to stabilize and adjust the motor speed. The preset value can be set according to user requirements. In this embodiment of the invention, the speed regulator 13 includes a speed control switch, which can adjust the motor speed by adjusting the speed or frequency.

[0013] In an embodiment of this utility model, the variable speed motor 12 includes a speed-regulating brushless DC motor, which can generate different motor speeds according to different speed adjustment signals. That is, the variable speed motor 12 adjusts the motor speed according to different speed adjustment signals.

[0014] In an embodiment of this utility model, the speed signal output terminal 14 includes a speed signal output socket for outputting a motor speed signal. The speed signal output socket includes multiple contacts to output multiple segments of different motor speeds.

[0015] Please see Figure 2A and Figure 2B , Figure 2AThis is a block diagram illustrating the dynamic stability testing system for wind turbine speed of this utility model, which includes a speed display, a speed detector, and a power switch. Figure 2B for Figure 2A The circuit connection diagram is shown below. The speed display 15 is electrically connected to the power supply 11 and the generator motor G, and displays the motor speed of the generator motor G based on the motor speed signal. Through the motor speed information displayed in real time by the speed display 15, when the motor speed of the generator motor G fluctuates and cannot be stabilized, the speed regulator 13 mentioned above can be used to adjust and stabilize the motor speed of the variable speed motor 12, further stabilizing the motor speed input to the generator motor G.

[0016] As described above, the speed detector 16 is electrically connected to the generator motor G and the speed signal output terminal 14. The speed detector 16 is used to detect the motor speed and generate a motor speed signal based on the detected motor speed. In an embodiment of this utility model, the speed detector 16 includes a rotary encoder to detect the rotation angle of the generator motor G, that is, to detect the rotation position of the generator motor G. The rotary encoder outputs two-phase ABZ signals with origin to the frequency converter, providing complete rotation position and speed information of the generator motor G, and assisting the speed display 15 in displaying the motor speed in real time. In an embodiment of this utility model, the rotary encoder includes an absolute encoder and an incremental encoder.

[0017] As mentioned above, the power switch 17 is electrically connected to the power supply 11 and the speed display 15, and is used to turn the power on or off.

[0018] In summary, the wind turbine speed dynamic stability test system of this utility model provides the connected wind turbine with the speed generated by the wind turbine, replacing the blade rotation of the wind turbine, and dynamically adjusts the motor speed of the variable speed motor to stably output the motor speed signal to the wind turbine, thereby further stabilizing the power quality of the wind turbine.

[0019] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the present utility model's technical solution shall still fall within the scope of the present utility model's technical solution.

Claims

1. A dynamic stability testing system for wind turbine speed, characterized in that, Include: A power source provides electricity; A variable speed motor is electrically connected to the power supply, receives the power and drives a connected generator motor, so that the generator motor generates a motor speed, and outputs a motor speed signal according to the motor speed. A speed regulator, electrically connected to the variable speed motor, adjusts the motor speed; and A speed signal output terminal is electrically connected to the generator motor to output the motor speed signal.

2. The wind turbine speed dynamic stability testing system as described in claim 1, characterized in that, The variable speed motor includes a speed-regulating brushless DC motor.

3. The wind turbine speed dynamic stability testing system as described in claim 1, characterized in that, The speed signal output terminal includes a speed signal output socket.

4. The wind turbine speed dynamic stability testing system as described in claim 1, characterized in that, It also includes a speed detector, which is electrically connected to the generator and the speed signal output terminal to detect the speed of the generator.

5. The wind turbine speed dynamic stability testing system as described in claim 4, characterized in that, The speed detector includes a rotary encoder that detects a rotation angle of the generator motor.

6. The wind turbine speed dynamic stability testing system as described in claim 4, characterized in that, It also includes a tachometer display, which is electrically connected to the power supply and the generator motor to display the motor speed.

7. The wind turbine speed dynamic stability testing system as described in claim 6, characterized in that, It also includes a power switch that is electrically connected to the power supply and the speed display to turn the power on or off.

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