A wind turbine performance detection system

Abstract

The present invention relates to the technical field of generator performance detection, and specifically discloses a wind turbine performance detection system. The system includes: a wind simulation chamber for providing a wind simulation environment for the wind turbine; an analysis center for analyzing the state parameters to obtain the rotational performance characteristic values of the wind turbine, comparing the rotational performance characteristic values of the wind turbine with the preset qualified rotational performance characteristic values, and generating a signal indicating that the wind turbine performance is qualified if the power generation performance of the wind turbine is qualified. According to the present invention, a wind simulation environment is provided through the wind simulation chamber to provide different magnitudes of wind for the wind turbine, and the analysis center analyzes the state parameters to determine whether the power generation performance of the wind turbine is qualified, and fully and intelligently detects its performance, ensuring that the various performances of the wind turbine are qualified and avoiding the problem of shortened service life caused by unqualified performance of a certain item.

Description

Technical Field

[0001] The present invention relates to the technical field of generator performance detection, and particularly to a wind turbine generator performance detection system. Background Art

[0002] A wind turbine generator is a power device that converts wind energy into mechanical work. The mechanical work drives the rotor to rotate, and finally outputs alternating current. A wind turbine generator generally consists of components such as a wind wheel, a generator (including devices), a yaw device (tail fin), a tower, a speed limit safety mechanism, and an energy storage device. The working principle of a wind turbine generator is relatively simple. The wind wheel rotates under the action of wind force, and it converts the kinetic energy of the wind into the mechanical energy of the wind wheel shaft. The generator rotates to generate electricity driven by the wind wheel shaft.

[0003] Before leaving the factory, a wind turbine generator needs to be subjected to performance detection to ensure its normal operation and achieve the expected power generation effect. The purpose of performance detection is to test and verify various key parameters and indicators of the generator to ensure the quality and reliability of its design and manufacture, and its compliance with safety and efficiency requirements. In the prior art, the performance detection of wind turbine generators before leaving the factory mostly only simulates the wind force received during the power generation process of the wind turbine generator through a wind simulation chamber with a preset size, and then detects whether the output power generation of the wind turbine generator meets the standard. This detection method is relatively simple and cannot fully and intelligently detect the performance of the wind turbine generator. It may be that although the output power generation of the wind turbine generator meets the standard, other performances do not meet the standard, thereby shortening its service life. Summary of the Invention

[0004] The purpose of the present invention is to provide a wind turbine generator performance detection system to solve the following technical problems:

[0005] How to fully and intelligently detect the performance of a wind turbine generator.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A wind turbine generator performance detection system, the system includes:

[0008] A wind simulation chamber for providing a wind simulation environment for the wind turbine generator;

[0009] An acquisition module for acquiring the working state parameters of the wind turbine generator;

[0010] An analysis center is used to analyze the status parameters to obtain the rotational performance characteristic values of the wind turbine, compare the rotational performance characteristic values of the wind turbine with the preset qualified rotational performance characteristic values to determine whether the rotational performance of the wind turbine is qualified. If the rotational performance of the wind turbine is qualified, further analyze the status parameters to obtain the power generation performance conversion value of the wind turbine, compare the power generation performance conversion value with the preset qualified conversion value to determine whether the power generation performance of the wind turbine is qualified. If the power generation performance of the wind turbine is qualified, a signal indicating that the performance of the wind turbine is qualified is generated;

[0011] A signal execution end is used to execute the qualified signal.

[0012] Further, the working state parameters of the wind turbine include:

[0013] The rotational speed of the wind turbine obtained by collecting and analyzing based on a camera;

[0014] The vibration amplitude and vibration frequency of the support frame during the rotation of the wind turbine obtained by collecting based on a vibration sensor;

[0015] The output voltage and current during the rotation of the wind turbine obtained by collecting based on a multimeter.

[0016] Further, the process of obtaining the rotational speed of the wind turbine by collecting and analyzing based on a camera includes:

[0017] S1. Shoot a video of the detection process of the wind turbine detected in the wind simulation chamber through a camera;

[0018] S2. Perform noise reduction and image enhancement processing on the captured video;

[0019] S3. Extract the blade features during the rotation of the wind turbine through an edge detection method, and track the position and movement trajectory of the blade features through a flow algorithm;

[0020] S4. Calculate the real-time rotational speed of the wind turbine by analyzing the results of blade feature tracking and the frame rate of the imaging device, and perform curve fitting to obtain the rotational speed curve of the wind turbine .

[0021] Further, the process of determining whether the rotational performance of the wind turbine is qualified includes:

[0022] Read the data of the control module in the wind simulation chamber to obtain the wind force change data in the wind simulation chamber, and analyze the rotational speed data of the wind turbine to obtain the rotational performance loss value of the wind turbine ;

[0023] The wind force change data includes the wind direction data and wind speed data in the wind simulation chamber;

[0024] Obtain the rotational sway deviation value of the wind turbine by analyzing the indoor wind force change data simulated by wind force and the vibration data collected by the vibration sensor ;

[0025] Obtain the rotational performance characteristic value of the wind turbine through the above formula calculation and analysis ;

[0026] Among them, and are both rotational performance weight coefficients;

[0027] Compare the rotational performance characteristic value of the wind turbine with the preset qualified rotational performance characteristic value ;

[0028] If , the rotational performance of the wind turbine is qualified, and further analyze its state parameters;

[0029] If , the performance of the wind turbine is unqualified.

[0030] Furthermore, the process of obtaining the rotational performance loss value of the wind turbine includes:

[0031] Obtain the wind speed curve of the change of wind speed with time during the detection process of the wind force simulation chamber according to the wind speed data ;

[0032] Take multiple time nodes at equal time intervals, and substitute the multiple time nodes into the rotational speed curve of the wind turbine and the wind speed curve respectively to obtain the rotational speed of the wind turbine and the wind speed data at multiple time points;

[0033] Taking as the X-axis and as the Y-axis to establish a plane coordinate system, and perform curve fitting according to the at all time points to obtain the curve of the rotational speed of the wind turbine changing with the wind speed ;

[0034] Obtain the rotational performance damage value of the wind turbine through the above formula calculation and analysis

[0035] Among them, is the preset wind speed change interval, is the ideal curve of the rotational speed of the wind turbine changing with the wind force.

[0036] Further, the process of obtaining the rotational sway deviation value of the wind turbine includes:

[0037] During the detection of the wind turbine by the vibration sensor, the vibration amplitude and vibration frequency of the support frame are monitored in real time, and the curve of the vibration amplitude changing with time is obtained respectively and the curve of the vibration frequency changing with time ;

[0038] The vibration intensity reference value during the detection of the wind turbine is obtained through the above formula calculation and analysis ;

[0039] Among them, is the preset detection time interval, and are the vibration intensity weight coefficients;

[0040] During the detection of the wind turbine, multiple vibration intensity reference values are taken at equal preset detection time interval intervals ;

[0041] Substitute the intermediate value of each preset detection time interval into the wind speed curve to obtain the wind speed data corresponding to the intermediate time nodes of multiple preset detection time intervals ;

[0042] Taking as the X-axis and as the Y-axis to establish a plane coordinate system, and perform curve fitting according to the of all intermediate time nodes of the preset detection time intervals to obtain the curve of the wind turbine vibration intensity value changing with the wind speed ;

[0043] The rotational sway deviation value of the wind turbine is obtained through the above formula calculation and analysis ;

[0044] Among them, is the ideal curve of the vibration intensity changing with the wind force during the rotation of the wind turbine.

[0045] Further, the process of generating the signal indicating that the performance of the wind turbine is qualified includes:

[0046] When , during the rotation of the wind turbine, the output voltage and current are monitored in real time by a multimeter, and the curve of the output power of the wind turbine changing with time is analyzed and obtained ;

[0047] The output power loss ratio of the wind turbine is obtained through the above formula calculation and analysis ;

[0048] wherein, is the ideal output power of the wind turbine;

[0049] Compare the output power loss ratio of the wind turbine with the preset allowable loss ratio ;

[0050] If , generate a signal indicating that the performance of the wind turbine is qualified;

[0051] If , the performance of the wind turbine is unqualified.

[0052] Furthermore, the process of obtaining the curve of the output power of the wind turbine changing with time includes:

[0053] The output voltage and current during the rotation of the wind turbine are monitored in real time through a multimeter, and the curves of the output voltage changing with time and the curve of the output current changing with time are obtained respectively;

[0054] The curve of the output power of the wind turbine changing with time is obtained through the formula ; ;

[0055] wherein, is the power factor.

[0056] Advantages of the present invention:

[0057] (1) The present invention provides a wind simulation environment through a wind simulation chamber, provides different magnitudes of wind to the wind turbine, collects the working state parameters of the wind turbine through a collection module, and then analyzes the state parameters through an analysis center to obtain the rotational performance characteristic values during the rotation of the wind turbine. When the rotational performance of the wind turbine is detected to be qualified, further analyze the state parameters to obtain the power generation performance conversion value of the wind turbine, and judge whether the power generation performance of the wind turbine is qualified. If the power generation performance of the wind turbine is qualified, a signal indicating that the performance of the wind turbine is qualified is generated. In this way, after the wind turbine is produced, its performance can be fully and intelligently detected to ensure that the various performances of the wind turbine are qualified and avoid the problem of shortened service life caused by unqualified performance of a certain item.

[0058] (2) The rotational speed of the wind turbine obtained by the present invention through camera collection and analysis;

[0059] During the rotation of the wind turbine, the vibration amplitude and vibration frequency of the support frame are collected through vibration sensors. By analyzing the collected rotation speed, vibration amplitude, vibration frequency of the wind turbine and the wind force change in the wind force simulation chamber, the rotation characteristic value of the wind turbine is calculated and compared with the preset qualified rotation performance characteristic value, so as to complete the preliminary detection of the performance of the wind turbine.

[0060] (3)In the present invention, the output voltage and current during the rotation of the wind turbine are collected through a multimeter. By analyzing the collected output voltage, current of the wind turbine and the wind force change in the wind force simulation chamber, the output power loss ratio of the wind turbine is calculated and compared with the preset allowable loss ratio, so as to complete the full intelligent detection of the performance of the wind turbine. Brief Description of the Drawings

[0061] The present invention will be further described below with reference to the accompanying drawings.

[0062] Figure 1 is a schematic block diagram of the present invention for detecting the performance of a wind turbine. Detailed Embodiments

[0063] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0064] Please refer to Figure 1 As shown, in one embodiment, a wind turbine performance detection system is provided, and the system includes:

[0065] A wind force simulation chamber for providing a wind force simulation environment for the wind turbine;

[0066] A collection module for collecting the working state parameters of the wind turbine;

[0067] An analysis center for analyzing the state parameters to obtain the rotation performance characteristic value of the wind turbine, comparing the rotation performance characteristic value of the wind turbine with the preset qualified rotation performance characteristic value to judge whether the rotation performance of the wind turbine is qualified. If the rotation performance of the wind turbine is qualified, further analyze the state parameters to obtain the power generation performance conversion value of the wind turbine, compare the power generation performance conversion value with the preset qualified conversion value to judge whether the power generation performance of the wind turbine is qualified. If the power generation performance of the wind turbine is qualified, generate a signal indicating that the performance of the wind turbine is qualified;

[0068] The signal execution end is used to execute the qualified signal.

[0069] Through the above technical solution, this embodiment provides a wind turbine performance detection system. The detection system provides a wind simulation environment through a wind simulation chamber. After the wind turbine is produced, the wind turbine is placed in the wind simulation chamber. Different magnitudes of wind are provided to the wind turbine through the wind simulation chamber. The working state parameters of the wind turbine are collected by the acquisition module, and then the state parameters are analyzed by the analysis center to obtain the rotational performance characteristic values during the rotation of the wind turbine, and to judge whether the rotational performance of the wind turbine is qualified. When the rotational performance of the wind turbine is detected to be qualified, further analyze the state parameters to obtain the power generation performance conversion value of the wind turbine, and judge whether the power generation performance of the wind turbine is qualified. If the power generation performance of the wind turbine is qualified, a signal indicating that the wind turbine performance is qualified is generated, and this signal is executed by the signal execution end. In this way, after the wind turbine is produced, its performance can be fully and intelligently detected, ensuring that the various performances of the wind turbine are qualified and avoiding the problem of shortened service life caused by unqualified performance of a certain item.

[0070] In one embodiment, the working state parameters of the wind turbine include:

[0071] The rotational speed of the wind turbine obtained by collecting and analyzing based on a camera;

[0072] The vibration amplitude and vibration frequency of the support frame during the rotation of the wind turbine obtained by collecting based on a vibration sensor;

[0073] The output voltage and current during the rotation of the wind turbine obtained by collecting based on a multimeter.

[0074] The process of obtaining the rotational speed of the wind turbine by collecting and analyzing based on a camera includes:

[0075] S1. Shoot a video of the detection process of the wind turbine being detected in the wind simulation chamber through a camera;

[0076] S2. Perform noise reduction and image enhancement processing on the captured video;

[0077] S3. Extract the blade features during the rotation of the wind turbine through an edge detection method, and track the position and movement trajectory of the blade features through a flow algorithm;

[0078] S4. Calculate the real-time rotational speed of the wind turbine by analyzing the results of blade feature tracking and the frame rate of the imaging device, and fit it to obtain the rotational speed curve of the wind turbine. .

[0079] Through the above technical solution, this embodiment provides a method for collecting the operating state parameters of a wind turbine. The wind turbine is supported by a support frame with a preset standard specification strength, and the wind turbine is moved into a wind simulation chamber, where it is blown by the wind. A camera installed in the wind simulation chamber collects the rotation speed of the wind turbine. A vibration sensor installed on the support frame collects the vibration amplitude and vibration frequency of the support frame during the rotation of the wind turbine. A multimeter electrically connected to the output end of the wind turbine collects the output power supply and current during the rotation of the wind turbine. Among them, the process of collecting the rotation speed of the wind turbine by the camera includes: S1. Shoot a video of the detection process of the wind turbine detected in the wind simulation chamber by the camera; S2. Perform noise reduction and image enhancement processing on the captured video; S3. Extract the blade features during the rotation of the wind turbine by the edge detection method, and track the position and movement trajectory of the blade features by the optical flow algorithm; S4. Calculate the real-time rotation speed of the wind turbine by analyzing the results of tracking the blade features and the frame rate of the imaging device, and fit it to obtain the rotation speed curve of the wind turbine. , thus completing the collection of the operating state parameters of the wind turbine.

[0080] In the prior art, generally, magnetic induction / infrared remote sensing speed sensors, handheld tachometers, or direct mechanical sensing speed measurement are used, and the measurement accuracy and working efficiency are relatively high. However, most of these methods are applied to scenarios that are relatively convenient to maintain. The application environment of wind turbines is mostly in high-altitude environments, and even in test environments, they are at relatively high altitudes. If the detected data is abnormal, it is very difficult to judge the abnormal situation in the first time. In the present invention, an image recognition method is used to detect the rotation speed of the wind turbine, which can not only accurately obtain the rotation speed, but also utilize the characteristic that the camera can remotely and flexibly obtain image data to monitor the operating environment of the wind turbine from more angles in real time.

[0081] Considering the problem that the difference in the captured images may not be obvious when the frame rate of the camera is an integer multiple of the rotation speed of the wind turbine, a marker can be set at the rotating part of the wind turbine in the present invention. The displacement of the marker can reflect the rotation speed of the wind turbine, and the above problem can be avoided by dynamically adjusting the frame rate of the camera. In actual measurement, the ratio of the rotation speed of the wind turbine to the frame rate of the camera can be calculated in real time to obtain a ratio curve of the change of the ratio over time. According to the current slope of the ratio curve, the time to reach the next integer limit is estimated, and thus the frame rate of the camera is adjusted at a preset time before reaching the next integer limit. Generally, the adjustment range is .

[0082] In one embodiment, the process of determining whether the rotational performance of a wind turbine is qualified includes:

[0083] Obtain the wind force change data in the wind force simulation chamber, and analyze the rotational speed data of the wind turbine to obtain the rotational performance loss value of the wind turbine ;

[0084] The wind force change data includes the wind direction data and wind speed data in the wind force simulation chamber; the wind direction data can generally be expressed as the angle between the wind direction and the windward surface of the wind turbine, which is 90 degrees in this embodiment.

[0085] Analyze the wind force change data in the wind force simulation chamber and the vibration data collected by the vibration sensor to obtain the rotational sway deviation value of the wind turbine ;

[0086] Calculate and analyze through the above formula to obtain the rotational performance characteristic value of the wind turbine ;

[0087] Among them, and are both rotational performance weight coefficients;

[0088] Compare the rotational performance characteristic value of the wind turbine with the preset qualified rotational performance characteristic value ;

[0089] If , the rotational performance of the wind turbine is qualified, and further analyze its state parameters;

[0090] If , the performance of the wind turbine is unqualified.

[0091] The process of obtaining the rotational performance loss value of the wind turbine includes:

[0092] Obtain the wind speed curve of the ratio of wind speed to time during the detection process of the wind force simulation chamber according to the wind speed data ;

[0093] Take multiple time nodes at equal time intervals, and substitute the multiple time nodes into the rotational speed curve of the wind turbine and the wind speed curve respectively to obtain the rotational speed of the wind turbine at multiple time points and the wind speed data ;

[0094] Taking as the X-axis, as the Y-axis to establish a plane coordinate system, according to all time points of Perform curve fitting to obtain the curve of the rotational speed of the wind turbine varying with the wind speed ;

[0095]

[0096] Calculate and analyze through the above formula to obtain the rotational performance damage value of the wind turbine ;

[0097] Among them, is the preset wind speed change interval, is the ideal curve of the rotational speed of the wind turbine varying with the wind force

[0098] The process of obtaining the rotational sway deviation value of the wind turbine includes:

[0099] During the detection of the wind turbine by the vibration sensor, the vibration amplitude and vibration frequency of the support frame are monitored in real time, and the curve of the vibration amplitude varying with time and the curve of the vibration frequency varying with time ;

[0100]

[0101] Calculate and analyze through the above formula to obtain the vibration intensity reference value during the detection of the wind turbine ;

[0102] Among them, is the preset detection time interval, and are the vibration intensity weight coefficients;

[0103] During the detection of the wind turbine, multiple vibration intensity reference values are taken at intervals of the preset detection time interval ;

[0104] Substitute the intermediate value of each preset detection time interval into the wind speed curve to obtain the wind speed data corresponding to the intermediate time nodes of multiple preset detection time intervals ;

[0105] Taking as the X-axis and as the Y-axis to establish a plane coordinate system, and perform curve fitting according to the of all intermediate time nodes of the preset detection time intervals to obtain the curve of the vibration intensity value of the wind turbine varying with the wind speed ;

[0106] Calculate and analyze through the above formula to obtain the rotational sway deviation value of the wind turbine ;

[0107] in, It is an ideal curve showing the change of vibration intensity with wind force during the rotation of wind turbine.

[0108] Through the above technical solution, this embodiment provides a method for detecting the rotation performance of a wind turbine generator, and the rotation performance characteristic value of the wind turbine generator can be obtained by combining the following formulas: :

[0109] ;

[0110] in, is the rotation performance loss value of the wind turbine, is the rotational sway deviation value of the wind turbine, and are all rotation performance weight coefficients, which can be obtained based on experience. The curve of wind turbine speed changing with wind speed can be obtained, and the curve of wind speed changing with time during the wind simulation room test process can be obtained. , take multiple time nodes at equal time intervals, and bring the multiple time nodes into the wind turbine rotation speed curve and wind speed curve Get the wind turbine speed at multiple time points and wind speed data ,by is the X-axis, Establish a plane coordinate system for the Y axis, based on all time points Perform curve fitting. Specifically, you can use MATLAB to fit the curve of wind turbine speed changing with wind speed. , is the ideal curve of wind turbine speed changing with wind force, which can be obtained based on the experimental analysis of wind turbine speed and wind force. To preset the wind speed change range, select the preset according to the empirical data. It is the reference value of vibration intensity during wind turbine testing. To preset the detection time interval, and is the vibration intensity weight coefficient, which can be obtained based on the relationship between vibration intensity, vibration amplitude and vibration frequency. is the curve of vibration amplitude changing with time, The curve of vibration frequency changing with time can be obtained by real-time monitoring of the vibration amplitude and vibration frequency of the support frame during the wind turbine detection process through the vibration sensor. The curve of wind turbine vibration intensity value changing with wind speed can be used to obtain multiple vibration intensity reference values ​​at preset detection time intervals during wind turbine detection. Substitute the median values of each preset detection time interval into the wind speed curve to obtain the wind speed data corresponding to the intermediate time nodes of multiple preset detection time intervals , and take it as the X-axis and take it as the Y-axis to establish a plane coordinate system. According to the of all intermediate time nodes of the preset detection time intervals, perform curve fitting. Specifically, the curve of the vibration intensity value of the wind turbine varying with the wind speed can be obtained through fitting with MATLAB , is the ideal curve of the vibration intensity varying with the wind force during the rotation of the wind turbine, which can be obtained through the experimental analysis of the vibration intensity and wind force of the wind turbine;

[0111] Compare the rotational performance characteristic value of the wind turbine with the preset qualified rotational performance characteristic value ;

[0112] If , the rotational performance of the wind turbine is qualified, and further analyze its state parameters;

[0113] If , the performance of the wind turbine is unqualified;

[0114] Among them, the preset qualified rotational performance characteristic value can be obtained through the selection of the wind turbine detection experiment;

[0115] In this way, the preliminary detection of the performance of the wind turbine can be completed.

[0116] In an embodiment, the process of generating a signal indicating that the performance of the wind turbine is qualified includes:

[0117] When , use a multimeter to monitor the output voltage and current during the rotation of the wind turbine in real time, and analyze to obtain the curve of the output power of the wind turbine varying with time ;

[0118] Calculate and analyze through the above formula to obtain the output power loss ratio of the wind turbine ;

[0119] Among them, is the ideal output power of the wind turbine;

[0120] Compare the output power loss ratio of the wind turbine with the preset allowable loss ratio ;

[0121] If , generate a signal indicating that the performance of the wind turbine is qualified;

[0122] If , the performance of the wind turbine is unqualified.

[0123] The process of obtaining the curve of the output power of the wind turbine changing with time includes:

[0124] Use a multimeter to monitor the output voltage and current during the rotation of the wind turbine in real time, and respectively obtain the curve of the output voltage changing with time and the curve of the output current changing with time ;

[0125] Through the formula Calculate to obtain the curve of the output power of the wind turbine changing with time ;

[0126] where is the power factor.

[0127] Through the above technical solution, this embodiment provides a method for generating a signal indicating that the performance of the wind turbine is qualified;

[0128] When , use a multimeter to monitor the output voltage and current during the rotation of the wind turbine in real time, and respectively obtain the curve of the output voltage changing with time and the curve of the output current changing with time ;

[0129] Calculate and analyze through the above formula to obtain the output power loss ratio of the wind turbine ;

[0130] where is the power factor, is the ideal output power of the wind turbine, which can be obtained according to the output power experiment of the wind turbine;

[0131] Compare the output power loss ratio of the wind turbine with the preset allowable loss ratio ;

[0132] If , generate a signal indicating that the performance of the wind turbine is qualified;

[0133] If , the performance of the wind turbine is unqualified;

[0134] where the preset allowable loss ratio can be obtained by selecting through the wind turbine detection experiment;

[0135] In this way, the performance of the wind turbine to be shipped can be fully and intelligently detected, ensuring the sufficiency and intelligence of the performance detection of the wind turbine.

[0136] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. Any equivalent changes and improvements made within the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A wind turbine performance detection system, characterized in that: The system comprises: Wind simulation room, used to provide a wind simulation environment for wind turbines; A collection module is used to collect working status parameters of the wind turbine; an analysis center, for analyzing the state parameters, obtaining the rotation performance characteristic value of the wind turbine, comparing the rotation performance characteristic value of the wind turbine with a preset qualified rotation performance characteristic value, and judging whether the rotation performance of the wind turbine is qualified; if the rotation performance of the wind turbine is qualified, further analyzing the state parameters, obtaining the power generation performance conversion value of the wind turbine, comparing the power generation performance conversion value with a preset qualified conversion value, and judging whether the power generation performance of the wind turbine is qualified; if the power generation performance of the wind turbine is qualified, generating a signal indicating that the wind turbine performance is qualified; The signal execution terminal is used to execute qualified signals; The wind turbine operating state parameters include: The rotation speed of the wind turbine obtained based on camera acquisition and analysis; The vibration amplitude and frequency of the support frame during the rotation of the wind turbine generator obtained based on the vibration sensor; The output voltage and current of the wind turbine generator during its rotation are obtained based on the multimeter; The process of obtaining the rotation speed of the wind turbine based on camera acquisition and analysis includes: S1. Using a camera to shoot a video of the wind turbine testing process in the wind simulation room; S2, performing noise reduction and image enhancement processing on the captured video; S3, extracting the blade features of the wind turbine during its rotation process by using an edge detection method, and tracking the position and motion trajectory of the blade features by using a streamer algorithm; S4. By analyzing the results of blade feature tracking and the frame rate of the camera device, the real-time rotation speed of the wind turbine is calculated and fitted to obtain the wind turbine rotation speed curve V s (t); The process of judging whether the rotation performance of the wind turbine generator is qualified comprises: Obtain the wind force change data in the wind simulation room, and analyze the wind turbine rotation speed data to obtain the wind turbine rotation performance loss value Z s ; The wind force change data includes wind direction data and wind speed data in the wind force simulation room; The rotational sway deviation value W of the wind turbine is obtained by analyzing the wind force change data in the wind simulation room and the vibration data collected by the vibration sensor. s ; Q s =Z s *τ1+W s *τ2 The rotation performance characteristic value Q of the wind turbine is obtained by calculation and analysis based on the above formula: s ; Among them, τ1 and τ2 are the rotation performance weight coefficients; The rotation performance characteristic value Q of the wind turbine s And the preset rotation performance qualified characteristic value Q std Make a comparison; If Q s std , the rotation performance of the wind turbine generator is qualified, and its state parameters are further analyzed;​ If Q s ≥Q std , wind turbine performance is unqualified; The rotation performance loss value Z s The acquisition process includes: Obtaining a wind speed curve F(t) showing the wind speed changing with time during the wind simulation room detection process according to the wind speed data; Take multiple time nodes at equal time intervals and bring the multiple time nodes into the wind turbine rotation speed curve V s (t) and wind speed curve F(t), and obtain the wind turbine speed V at multiple time points s (tj) and wind speed data F(t j ); F(t j ) is the X axis, V s (t j ) is used as the Y axis to establish a plane coordinate system. According to all time points (F(t j ),V s (t j )] to perform curve fitting and obtain the curve V of wind turbine speed changing with wind speed s (F); The above formula is used to calculate and analyze the rotation performance damage value Z of the wind turbine. s ; Among them, [F1, F2] is the preset wind speed change range, V std (F) is the ideal curve of wind turbine speed changing with wind force.

2. A wind turbine performance detection system according to claim 1, characterized in that: The process of obtaining the rotational sway deviation value of the wind turbine generator comprises: The vibration amplitude and vibration frequency of the support frame during the wind turbine detection process are monitored in real time by a vibration sensor, and the curve E(t) of the vibration amplitude changing with time and the curve R(t) of the vibration frequency changing with time are obtained respectively; The vibration intensity reference value C during the wind turbine detection process is obtained by calculation and analysis using the above formula s ; Among them, [t a ,t b ] is the preset detection time interval, σ1 and σ2 are the vibration intensity weight coefficients; During the wind turbine inspection process, multiple vibration intensity reference values ​​C are taken at preset inspection time intervals. s (t i ); Substitute the middle value of each preset detection time interval into the wind speed curve F(t) to obtain the wind speed data F(t) corresponding to the middle time nodes of multiple preset detection time intervals. i ); F(t i ) is the X axis, C s (t i ) is used as the Y axis to establish a plane coordinate system, and the (F(t i ),C s (t i )) Perform curve fitting to obtain the wind turbine vibration intensity value versus wind speed curve C s (F); The rotational sway deviation value W of the wind turbine is obtained by calculating and analyzing the above formula: s ; Among them, C std (F) is the ideal curve of the vibration intensity changing with wind force during the rotation of the wind turbine.

3. A wind turbine performance detection system according to claim 2, characterized in that: The process of generating a signal that the wind turbine generator has qualified performance includes: When Q s std The output voltage and current of the wind turbine during its rotation are monitored in real time by a multimeter, and the curve P of the wind turbine output power changing with time is obtained by analysis. s (t);​ The output power loss ratio S of the wind turbine is obtained by calculating and analyzing the above formula c ; Among them, P std (t) is the ideal output power of the wind turbine; The output power loss ratio of the wind turbine generator is S c Compared with the preset allowable loss ratio S std Make a comparison; If S c ≤S std , generating a signal that the wind turbine performance is qualified; If S c >S std , the performance of wind turbines is unqualified.

4. A wind turbine performance detection system according to claim 3, characterized in that: The process of obtaining the output power variation curve of the wind turbine generator over time includes: The output voltage and current of the wind turbine during its rotation are monitored in real time by a multimeter, and the curve D(t) of the output voltage changing with time and the curve I(t) of the output current changing with time are obtained respectively; The curve P(t) showing the output power of the wind turbine changing with time is calculated by the formula P(t)=D(t)*I(t)*θ; Where θ is the power factor.

Images