Yaw vibration filtering device of wind generating set

Abstract

The utility model provides a yaw vibration filtering device of a wind generating set, which comprises a main control unit, a power supply control unit, a first double-shaft acceleration sensor and a second double-shaft acceleration sensor, and is characterized in that the main control unit is used for controlling power supply input and indirectly controlling power supply switching of the power supply control unit; the wind turbine generator set can perform specific yaw high-frequency filtering processing in the yaw state and perform common filtering processing in the non-yaw state at the same time, the power consumption of the wind turbine generator set is reduced, and the accuracy of yaw vibration filtering is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to a yaw vibration filtering device for a wind generator set. Background Art

[0002] The vibration acceleration sensor is rigidly mounted below the main shaft of the wind turbine nacelle, near the centerline of the nacelle. It is a core component for wind turbine safety protection. The sensor's measurements are fed into the wind turbine's main control system. If the vibration acceleration is excessive, the system must shut down the wind turbine. Otherwise, the wind turbine could collapse due to excessive nacelle vibration. Under normal circumstances, the vibration acceleration measured by the sensor reflects the actual vibration of the nacelle. If the measured vibration acceleration exceeds the protection limit, the wind turbine must be shut down immediately to ensure its safety. However, as the wind turbine runs, if the yaw brake pads become worn, during the process of the wind turbine yawing and stopping, the uneven surface of the brake pads or carbon powder deposition will cause abnormal friction between the brake pads and the brake disc. The high-frequency micro-vibration generated by this friction will be transmitted to the measuring chip of the vibration acceleration sensor through the cabin frame, interfering with the normal measurement of the measuring element, causing the vibration acceleration sensor to output a large vibration acceleration measurement value. When the measurement value exceeds the protection limit, the wind turbine will immediately report a vibration limit failure and shut down.

[0003] Currently, the primary filtering method in the wind power industry is to install high-frequency filter pads between the vibration accelerometer and the nacelle mounting surface. A secondary approach is to add a filtering program to the wind turbine's main control system and set up conditional filtering. However, these methods have the following drawbacks: 1. Adding high-frequency filter pads to the vibration accelerometer requires high technical requirements for the selection and installation of high-frequency filter pads, resulting in high installation costs. 2. Directly installing the pads can directly filter out abnormal high-frequency vibrations from the turbine during non-yaw conditions. 3. Adding a filtering program to the wind turbine's main control system can result in inadequate and incomplete filtering due to limitations in the filtering conditions. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model proposes a yaw vibration filtering device for a wind turbine generator set to solve the problems of the existing technology such as the difficulty in selecting high-frequency filtering, high requirements for installation process, no selection of filtering state, insufficient program filtering, and unclean filtering. The utility model controls the power supply input through the main control unit and indirectly controls the power supply switching of the power supply control unit, which can realize the wind turbine set to perform specific yaw high-frequency filtering processing in the yaw state and realize the wind turbine set to perform ordinary filtering processing in the non-yaw state, reducing power consumption while improving the accuracy of yaw vibration filtering.

[0005] A yaw vibration filtering device for a wind turbine generator set comprises: a control signal output port of a main control unit connected to a control signal receiving port of a power supply control unit, a power output port of the main control unit connected to a power input port of the power supply control unit, a first signal input port of the main control unit connected to a signal output port of a first biaxial acceleration sensor, a second signal input port of the main control unit connected to a signal output port of a second biaxial acceleration sensor, a first power supply port of the power supply control unit connected to a power supply port of the first biaxial acceleration sensor, and a second power supply port of the power supply control unit connected to a power supply port of the second biaxial acceleration sensor;

[0006] a first biaxial acceleration sensor, configured to send the first vibration signal after the first filtering process to the main control unit;

[0007] a second biaxial acceleration sensor, configured to send a second vibration signal subjected to a second filtering process using a filter having a specific yaw filtering frequency to the main control unit;

[0008] The main control unit is used to send the control parameters generated by the first vibration signal and the second vibration signal to the wind turbine generator set.

[0009] The beneficial effects of the utility model are: reducing the power consumption of the wind turbine generator set and improving the accuracy of yaw vibration filtering. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0011] Figure 1 A schematic structural diagram of a yaw vibration filter device for a wind turbine generator set provided by one embodiment of the present utility model;

[0012] Figure 2 A schematic structural diagram of a yaw vibration filter device for a wind turbine generator set provided by another embodiment of the present invention;

[0013] Figure 3 This is a circuit diagram of the ADXL202 dual-axis acceleration sensor provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0014] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0015] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0016] In one embodiment, Figure 1 As shown, a yaw vibration filtering device for a wind turbine generator set is provided, comprising a main control unit, a power supply control unit, a first biaxial acceleration sensor and a second biaxial acceleration sensor, wherein:

[0017] The control signal output port of the main control unit is connected to the control signal receiving port of the power supply control unit. The main control unit is used to provide a control signal to the power supply control unit.

[0018] The power output port of the main control unit is connected to the power input port of the power supply control unit, and the main control unit is used to provide power input to the power supply control unit.

[0019] The first signal input port of the main control unit is connected to the signal output port of the first biaxial acceleration sensor. The first biaxial acceleration sensor is used to collect a first vibration signal and perform a first filtering process on the collected first vibration signal.

[0020] The second signal input port of the main control unit is connected to the signal output port of the second biaxial acceleration sensor. The second biaxial acceleration sensor is used to collect a second vibration signal and perform a second filtering process on the collected second vibration signal.

[0021] like Figure 2 As shown, the first power supply port of the power supply control unit is connected to the power supply port of the first dual-axis acceleration sensor, and the second power supply port of the power supply control unit is connected to the power supply port of the second dual-axis acceleration sensor; when the power supply input received by the power supply control unit is a low level, the power supply control unit controls the first dual-axis acceleration sensor to be in a power-on state, and controls the second dual-axis acceleration sensor to be in a power-off state; when the power supply input received by the power supply control unit is a high level, the power supply control unit controls the second dual-axis acceleration sensor to be in a power-on state, and controls the first dual-axis acceleration sensor to be in a power-off state.

[0022] a first biaxial acceleration sensor, configured to send the first vibration signal after the first filtering process to the main control unit;

[0023] Preferably, the model of the first biaxial acceleration sensor is ADXL202, and the first vibration signal includes a first horizontal vibration signal and a first vertical vibration signal.

[0024] The first biaxial acceleration sensor does not set a specific filtering frequency. The first biaxial acceleration sensor collects the first vibration signal including the first horizontal vibration signal X 1-f and the first vertical vibration signal Y 1-f , directly perform general filtering processing, and then output the first vibration signal X after the first filtering processing 1-out and Y 2-out To the main control unit;

[0025] Specifically, the first horizontal vibration signal is the first vibration signal in the front-to-back direction (X direction) of the wind turbine nacelle collected by the first biaxial acceleration sensor, and the first vertical vibration signal is the first vibration signal in the left-to-right direction (Y direction) of the wind turbine nacelle collected by the first biaxial acceleration sensor.

[0026] a second biaxial acceleration sensor, configured to send a second vibration signal subjected to a second filtering process using a filter having a specific yaw filtering frequency to the main control unit;

[0027] Preferably, the model of the second dual-axis acceleration sensor is ADXL202, and the second vibration signal includes a second horizontal vibration signal and a second vertical vibration signal.

[0028] The second dual-axis acceleration sensor sets a specific yaw filter frequency P. The specific yaw filter frequency P can be measured by the actual normal yaw condition of the unit and the vibration frequency f of the unit. n , take f n N times of the specific yaw filter frequency P, that is, P = N*f n ;like Figure 3 As shown, you can also adjust the capacitor C X and C Y The size is used to set the specific yaw filter frequency P, C X and C Y Connect to X FILT and Y FILT The formula is P = 5μF / C(x, y).

[0029] The second biaxial acceleration sensor collects the second vibration signal including the second horizontal vibration signal X 2-f and the second vertical vibration signal Y 2-f , the vibration frequencies of the second horizontal vibration signal and the second vertical vibration signal are A and B respectively, and then A and B are subjected to a second filtering process:

[0030] ① When A≥P value, the low-pass filter circuit in the second biaxial acceleration sensor blocks the second horizontal vibration signal X 2-f pass;

[0031] ② When A<P value, the low-pass filter circuit in the second biaxial acceleration sensor allows the second horizontal vibration signal X 2-f pass;

[0032] ③ When B≥P value, the low-pass filter circuit in the second biaxial acceleration sensor blocks the second vertical vibration signal Y 2-f pass;

[0033] ④ When B<P value, the low-pass filter circuit in the second biaxial acceleration sensor allows the second vertical vibration signal Y 2-f pass.

[0034] Output the second vibration signal X after the second filtering process 2-out and Y 2-out to the main control unit.

[0035] The main control unit is used to send the control parameters generated by the first vibration signal and the second vibration signal to the wind turbine generator set.

[0036] The main control unit is used to send the control parameters generated by the first vibration signal and the second vibration signal to the wind turbine generator set, thereby controlling the entire wind turbine generator set, including controlling the operation and shutdown of the wind turbine generator set.

[0037] The utility model effectively solves the problems in the prior art such as the difficulty in selecting high-frequency filtering pads, high requirements for installation process, no selection of filtering state, insufficient program filtering, and unclean filtering. The utility model controls the power supply input through the main control unit and indirectly controls the power supply switching of the power supply control unit, which can realize the wind turbine to perform specific yaw high-frequency filtering processing in the yaw state and realize ordinary filtering processing in the non-yaw state, thereby reducing the power consumption of the wind turbine and improving the accuracy of yaw vibration filtering.

[0038] The above is only a diagram illustrating some principles of a yaw vibration filtering device for a wind turbine generator set of the present invention, and is not intended to limit the present invention to the specific structure and applicable scope shown. Therefore, all corresponding modifications and equivalents that may be used are within the scope of the patent applied for by the present invention.

Claims

1. A yaw vibration filter device for a wind turbine generator set, characterized in that: It includes a main control unit, a power supply control unit, a first biaxial acceleration sensor and a second biaxial acceleration sensor, wherein: The control signal output port of the main control unit is connected to the control signal receiving port of the power supply control unit, the power output port of the main control unit is connected to the power input port of the power supply control unit, the first signal input port of the main control unit is connected to the signal output port of the first biaxial acceleration sensor, the second signal input port of the main control unit is connected to the signal output port of the second biaxial acceleration sensor, the first power supply port of the power supply control unit is connected to the power supply port of the first biaxial acceleration sensor, and the second power supply port of the power supply control unit is connected to the power supply port of the second biaxial acceleration sensor; a first biaxial acceleration sensor, configured to send the first vibration signal after the first filtering process to the main control unit; a second biaxial acceleration sensor, configured to send a second vibration signal subjected to a second filtering process using a filter having a specific yaw filtering frequency to the main control unit; The main control unit is used to send the control parameters generated by the first vibration signal and the second vibration signal to the wind turbine generator set.

2. A wind turbine generator set yaw vibration filter device according to claim 1, characterized in that: The model of the first dual-axis acceleration sensor is ADXL202.

3. The yaw vibration filter device for a wind turbine generator set according to claim 1, characterized in that: The model of the second dual-axis acceleration sensor is ADXL202.

4. The yaw vibration filter device for a wind turbine generator set according to claim 1, characterized in that: The first vibration signal includes a first horizontal vibration signal and a first vertical vibration signal.

5. The yaw vibration filter device for a wind turbine generator set according to claim 1, characterized in that: The second vibration signal includes a second horizontal vibration signal and a second vertical vibration signal.

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