Fan frequency conversion yaw wind facing control device

Abstract

A frequency conversion yaw wind facing control device of a fan comprises an acquisition module, a conversion module, a controller, a PMW driving module and a yaw motor, the yaw motor is connected with a power module in parallel, the acquisition module is connected with the input end of the controller and used for acquiring three-phase voltage and current, and the output end of the controller is sequentially connected with the PMW driving module, the power module and the yaw motor. The utility model aims to provide a fan frequency conversion yaw wind alignment control device which is used for solving the problems that an existing fan is low in yaw wind alignment efficiency and low in speed.

Description

Technical Field

[0001] The utility model relates to a variable frequency yaw wind control device for a fan. Background Art

[0002] As the scale of wind power generation becomes larger and larger, the yaw system of wind turbines has also received widespread attention. At present, the most widely used yaw control method for wind turbines is to control the yaw of the motor to the wind by directly attracting the weak current control contactor. This method is uniform yaw control with a simple control system and low cost, but the yaw efficiency is low and the speed is slow. Utility Model Content

[0003] The utility model aims to provide a variable frequency yaw wind control device for a fan, which is used to solve the problems of low yaw wind efficiency and slow speed of the existing fan.

[0004] In order to solve the above problems, the technical solution of the utility model is:

[0005] A variable frequency yaw wind control device for a wind turbine includes an acquisition module, a conversion module, a controller, a PMW drive module, a power module and a yaw motor. The acquisition module is connected to the input end of the controller and is used to collect three-phase voltage and current. The output end of the controller is connected to the PMW drive module and the power module. The PMW drive module is connected to the yaw motor, and the power module is connected in parallel with the yaw motor.

[0006] The beneficial effects of the present utility model are as follows: compared with the traditional yaw-to-wind method of wind turbines, the solution proposed in this invention can realize variable frequency and variable speed yaw-to-wind, and by cutting into different frequencies with different yaw-to-wind angle differences and wind speeds, variable frequency and variable speed yaw control can be realized. This method improves the utilization efficiency of wind energy and increases power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The utility model is further described below in conjunction with the accompanying drawings:

[0008] Figure 1 It is a structural schematic diagram of the utility model.

[0009] Figure 2 It is a flow chart of the utility model.

[0010] Figure 3 This is a circuit diagram of the current sampling module of the utility model.

[0011] Figure 4 This is a circuit diagram of a voltage sampling module of the utility model.

[0012] Figure 5 This is a circuit diagram of the drive module of the utility model.

[0013] In the figure: acquisition module 1, A / D conversion module 2, controller 3, PMW drive module 4, yaw motor 5, power module 6. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] like Figures 1 to 5 As shown, the variable frequency yaw wind control device of the wind turbine includes an acquisition module 1, a conversion module 2, a controller 3, a PMW drive module 4, a power module 6 and a yaw motor 5. The acquisition module 1 is connected to the input end of the controller 3 and is used to collect three-phase voltage and current. The output end of the controller 3 is connected to the PMW drive module 4 and the power module 6. The PMW drive module 4 is connected to the yaw motor 5, and the power module 6 is connected in parallel with the yaw motor 5.

[0016] The controller 3 is a DSP controller 3 .

[0017] The acquisition module 1 includes a voltage sampling module and a current sampling module. The current sampling module includes an operational amplifier P1. The same-direction end of the operational amplifier P1 is connected in series with a resistor R102, a resistor R100, a resistor R101 and a reverse section of the operational amplifier P1 in sequence. The output end of the operational amplifier is connected in series with a voltage zener diode Z1 and a capacitor C67 in parallel and then grounded. The voltage acquisition module 1 includes an operational amplifier P2. The output end of the operational amplifier P2 is connected in series with a voltage zener diode Z2 and a capacitor C57 in parallel and then grounded. The power input end of the operational amplifier P2 is connected in parallel with a capacitor C66 and then grounded. The voltage sampling module and the current sampling module input the collected analog quantity into the DSP controller 3 in a voltage-raising manner, and then convert the analog quantity into a digital quantity through the A / D conversion module 2.

[0018] An IGBT module is provided between the PMW drive module 4 and the yaw motor 5. The PMW drive module 4 controls the on and off of the IGBT tube by using the PWM wave obtained inside the DSP to realize variable speed rotation of the motor by variable frequency drive control.

[0019] The working process of the utility model is:

[0020] 1. First, the three-phase voltage is collected through the voltage sampling module and the current sampling module, and then the DSP controller 3 converts the three-phase voltage into a two-phase rotating voltage through Clark transformation and Park transformation to achieve the control effect of the DC motor.

[0021] 2. Then get Ud and Uq, and further perform PI phase locking by inputting a given value and Uq. PI control uses incremental PID control output to get the angle θ by multiplying the rotation angular velocity w and t. PI control is Piout=Kp(Err-Erro)+Ki*Err, Err=Define-FB, and the frequency can be 10kHz.

[0022] 3. Get Ud= through the phase-locked loop Um, and then get the modulated wave, and adjust the output frequency and waveform quality by adjusting the modulated wave frequency.

[0023] 4. The DSP controller 3 drives the yaw system motor to rotate at variable frequency and speed by controlling the output of the PMW drive module 4 and the power module 6.

[0024] Compared with the traditional control method of the yaw motor 5, this method realizes variable frequency and speed, realizes rapid wind direction, improves the wind energy utilization efficiency, and improves the power generation efficiency.

[0025] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the utility model concept. The protection scope of the utility model should not be deemed to be limited to the specific forms described in the embodiments. The protection scope of the utility model also extends to equivalent technical means that can be thought of by those skilled in the art based on the concept of the utility model.

Claims

1. A wind turbine variable frequency yaw wind control device, characterized in that: It includes an acquisition module, a conversion module, a controller, a PMW drive module, a power module and a yaw motor. The acquisition module is connected to the input end of the controller and is used to collect three-phase voltage and current. The output end of the controller is connected to the PMW drive module and the power module. The PMW drive module is connected to the yaw motor, and the power module is connected in parallel with the yaw motor.

2. The wind turbine variable frequency yaw wind control device according to claim 1, characterized in that: The controller is a DSP controller.

3. The wind turbine variable frequency yaw wind control device according to claim 1, characterized in that: The acquisition module includes a voltage sampling module and a current sampling module. The current sampling module includes an operational amplifier P1. The same-direction end of the operational amplifier P1 is connected in series with resistor R102, resistor R100, resistor R101 and the reverse section of the operational amplifier P1 in sequence. The output end of the operational amplifier is connected in series with a parallel Zener diode Z1 and a capacitor C67 and then grounded. The voltage sampling module includes an operational amplifier P2. The output end of the operational amplifier P2 is connected in series with a parallel Zener diode Z2 and a capacitor C57 and then grounded. The power input end of the operational amplifier P2 is connected in parallel with a capacitor C66 and then grounded.

4. The wind turbine variable frequency yaw wind control device according to claim 1, characterized in that: An IGBT module is provided between the PMW drive module and the yaw motor.

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