CN115539325A - Tower vibration early warning method based on wind turbine generator system - Google Patents
Tower vibration early warning method based on wind turbine generator system Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/82—Forecasts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention provides a wind turbine generator system tower vibration early warning method which comprises the following steps: acquiring a maximum reference vibration circle of a tower of a wind turbine generator to be tested under rated power; acquiring a maximum dynamic vibration circle of a tower of a wind turbine generator to be tested under the operation condition; comparing the maximum reference vibration circle of the tower with the maximum dynamic vibration circle of the tower, and judging whether the tower is abnormal or not according to a comparison result; the method effectively reduces the vibration response of the tower under the variable working condition, and improves the accuracy and reliability of the judgment of the tower vibration.
Description
Technical Field
The invention belongs to the field of health state monitoring and evaluation of wind turbine generators, and particularly relates to a wind turbine generator tower vibration early warning method.
Background
In order to better capture wind energy and reduce operation load, a variable speed variable pitch control mode is generally adopted by a large wind turbine; the wide rotating speed operating range of the wind wheel can cause the rotating frequency of the wind wheel to coincide with the natural frequency of the tower at a certain rotating speed point, so that induced vibration is generated; different influences can be caused to the pylon to different vibrations, and too big this stability and the life-span of whole machine of vibration have very big adverse effect, and it has realistic meaning to vibrate the early warning to the pylon this moment.
The conventional vibration identification method is based on forced vibration and free vibration, a first-order natural frequency of the tower is solved by using a frequency response function in a frequency domain or an impulse response function in a time domain, and vibration is identified by combining the superposition of the wind wheel rotation frequency and the tower natural frequency at a rotating speed point; although the method is simple and intuitive in judgment of the tower vibration, the operating environment of the wind turbine generator is complex and changeable, the interaction mechanism of the wind load and the generator structure is very complex, the tower rigidity may be degraded along with the increase of the operating life, and the accuracy and the reliability of the engineering application of the method need to be further improved.
Disclosure of Invention
The invention aims to provide a wind turbine generator tower vibration early warning method, which overcomes the defect of low accuracy in the existing wind turbine generator tower vibration early warning.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a wind turbine generator system tower vibration early warning method which comprises the following steps:
acquiring a maximum reference vibration circle of a tower of a wind turbine generator to be tested under rated power;
acquiring a maximum dynamic vibration circle of a tower of a wind turbine generator to be tested under the operation condition;
and comparing the maximum reference vibration circle of the tower with the maximum dynamic vibration circle of the tower, and judging whether the tower is abnormal or not according to the comparison result.
Preferably, the maximum reference vibration circle of the tower of the wind turbine generator to be measured under the rated power is obtained, and the specific method comprises the following steps:
acquiring an inclination azimuth angle and a vibration amplitude of a tower of a wind turbine generator to be tested under rated power;
and drawing a maximum reference vibration circle of the tower according to the obtained inclination azimuth angle and the vibration amplitude.
Preferably, the inclination azimuth angle and the vibration amplitude of the tower of the wind turbine generator to be tested under the rated power are obtained, and the specific method comprises the following steps:
respectively acquiring acceleration data of the tower in the orthogonal direction and the acceleration data of the tower in the horizontal direction under rated power in real time;
and performing polar coordinate conversion on the obtained acceleration data in the orthogonal direction of the tower and the obtained acceleration data in the horizontal direction of the tower to obtain the inclination azimuth angle and the vibration amplitude of the tower.
Preferably, the maximum dynamic vibration circle of the tower of the wind turbine generator to be measured under the operation condition is obtained, and the specific method comprises the following steps:
acquiring real-time operation data of a wind turbine generator to be tested under an operation condition, wherein the operation data comprises incoming flow wind speed, a yaw area, a tower real-time inclination azimuth angle and a tower real-time vibration amplitude;
dividing the operation data into bins by using the incoming flow wind speed and the yaw area to obtain a plurality of bin dividing areas;
drawing to obtain a tower dynamic vibration circle of each bin division area according to the tower real-time inclination azimuth and the tower real-time vibration amplitude in each bin division area;
and selecting a tower maximum dynamic vibration circle from the obtained tower dynamic vibration circles.
Preferably, the operation data is binned by using the incoming flow wind speed and the yaw area to obtain a plurality of binned areas, and the specific method comprises the following steps:
setting a wind speed threshold value, and dividing the incoming flow wind speed in the operation data by the set step length to obtain a plurality of wind speed grades;
corresponding the incoming flow wind speed in the operation data to a corresponding wind speed grade; obtaining a plurality of operation subdata;
setting a yaw area threshold value, and dividing a yaw interval in each operation subdata by a set step length to obtain a plurality of area grades;
and corresponding the yaw area in each operation subdata to a corresponding area grade to obtain a plurality of bin dividing areas.
Preferably, the maximum reference vibration circle of the tower is compared with the maximum dynamic vibration circle of the tower, and whether the tower is abnormal is judged according to the comparison result, wherein the specific method comprises the following steps:
judging the size of the radius of the maximum dynamic vibration circle of the tower and the radius of the maximum reference vibration circle of the tower, wherein:
if the radius of the maximum dynamic vibration circle of the tower is larger than that of the maximum reference vibration circle of the tower, judging that the tower of the wind turbine generator to be tested vibrates abnormally; otherwise, judging that the tower of the wind turbine generator to be tested vibrates normally.
A wind turbine generator tower vibration early warning system comprises the following steps:
the reference vibration circle acquiring unit is used for acquiring the maximum reference vibration circle of the tower of the wind turbine generator to be tested under the rated power;
the dynamic vibration circle acquiring unit is used for acquiring the maximum dynamic vibration circle of the tower of the wind turbine generator to be tested under the operation condition;
and the judging unit is used for comparing the maximum reference vibration circle of the tower with the maximum dynamic vibration circle of the tower and judging whether the tower is abnormal or not according to a comparison result.
Preferably, the reference vibration circle acquiring unit includes:
the data acquisition module is used for acquiring the inclination azimuth angle and the vibration amplitude of the tower of the wind turbine generator to be tested under the rated power;
and the reference vibration circle drawing module is used for drawing the maximum reference vibration circle of the tower according to the obtained inclination azimuth angle and the vibration amplitude.
Preferably, the dynamic vibration circle acquiring unit includes:
the system comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring real-time operation data of a wind turbine generator to be tested under an operation condition, and the operation data comprises incoming flow wind speed, a yaw area, a tower real-time inclination azimuth angle and a tower real-time vibration amplitude;
the bin dividing module is used for dividing the operation data by using the incoming flow wind speed and the yaw area to obtain a plurality of bin dividing areas;
the dynamic vibration circle drawing module is used for drawing to obtain a dynamic vibration circle of the tower in each bin dividing area according to the real-time inclination azimuth angle and the real-time vibration amplitude of the tower in each bin dividing area; and selecting a tower maximum dynamic vibration circle from the obtained tower dynamic vibration circles.
Compared with the prior art, the invention has the beneficial effects that:
according to the wind turbine generator set tower vibration early warning method, the vibration circle corresponding to the rated power of the wind turbine generator set is used as the reference, the reference vibration circle is compared with the dynamic vibration circle under the operation condition of the wind turbine generator set, the vibration condition of the tower is judged, the vibration response of the tower under the variable working condition is effectively reduced, and the accuracy and the reliability of the judgment of the vibration of the tower are improved.
Furthermore, by acquiring tower vibration data corresponding to incoming flow wind speed and a yaw area and carrying out bin division processing on the tower vibration data according to the incoming flow wind speed and the yaw area, a plurality of groups of vibration data under different incoming flow wind speeds and sector areas are obtained, and tower vibration response under variable working conditions is further effectively reduced.
In conclusion, the method is visual and clear, is beneficial to monitoring the health condition of the wind turbine tower in real time, judges whether the wind turbine needs to be further processed and repaired, and ensures the safe and reliable operation of the wind turbine.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a flow chart of a drawing of a maximum reference circle of vibration of the tower;
FIG. 3 is a flow chart of the drawing of the maximum dynamic vibration circle of the tower.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, the invention provides a wind turbine tower vibration early warning method, which comprises the following steps:
step 1, respectively installing a low-frequency acceleration sensor in the orthogonal direction of a tower frame of a wind turbine generator and in the horizontal direction of the tower frame, wherein the two low-frequency acceleration sensors are respectively used for acquiring acceleration data of the wind turbine generator in the orthogonal direction of the tower frame under rated power and acceleration data of the wind turbine generator in the horizontal direction of the tower frame;
step 2, calculating to obtain a vibration amplitude A and an inclination azimuth angle theta of the tower according to the acceleration data of the tower in the horizontal direction and the acceleration data of the tower in the orthogonal direction obtained in the step 1, specifically:
performing coordinate conversion on the obtained acceleration of the tower in the orthogonal direction and the acceleration of the tower in the horizontal direction to obtain tower data with the vibration amplitude A and the inclination azimuth theta in a polar coordinate system;
step 3, respectively selecting three outermost vibration amplitudes and three outermost dip azimuth angles of the tower from the vibration amplitude A and the dip azimuth angle theta obtained in the step 2;
drawing a maximum reference vibration circle (O) of the tower according to the three inclination azimuth angles theta at the outermost periphery and the three vibration amplitude values A at the outermost periphery corresponding to the tower top ,R top )；
Step 4, acquiring operation data of the wind turbine generator under the normal operation condition, wherein the operation data comprises incoming flow wind speed, a yaw area, a tower real-time inclination azimuth angle and a tower real-time vibration amplitude;
setting a wind speed threshold value, and dividing the incoming flow wind speed in the operation data by the set step length to obtain a plurality of wind speed grades; in the embodiment, the wind speed threshold is 0.5m/s;
corresponding the incoming flow wind speed in the operation data to a corresponding wind speed grade; obtaining a plurality of operation subdata;
setting a yaw area threshold, and dividing a yaw interval in each operation subdata by a set step length to obtain a plurality of area grades, wherein the yaw area threshold is 22.5 degrees in the embodiment;
and corresponding the yaw area in each operation subdata to a corresponding area grade to obtain a plurality of bin dividing areas.
Step 5, respectively selecting three outermost towers from each sub-bin area to tilt the azimuth angle theta in real time Fruit of Chinese wolfberry And the three outermost towers have real-time vibration amplitude A Fruit of Chinese wolfberry Drawing to obtain dynamic vibration circle of tower corresponding to each compartment area, and selecting the maximum dynamic vibration circle (O) from the obtained multiple dynamic vibration circles i,top ,R i,top )。
Step 6, the maximum reference vibration circle (O) of the tower is set top ,R top ) Corresponding maximum dynamic vibration circle (O) of tower i,top ,R i,top ) And comparing, and judging whether the tower is abnormal or not according to a comparison result.
Specifically, in step 6, the maximum reference circle of tower vibration (O) top ,R top ) Corresponding maximum dynamic vibration circle (O) of tower i,top ,R i,top ) Comparing, and judging whether the tower is abnormal according to a comparison result, wherein the specific method comprises the following steps:
judging the radius R of the maximum dynamic vibration circle of the tower i,base Whether the radius is larger than the radius R of the maximum reference vibration circle of the tower base If the radius R is i,base Greater than radius R base Then, it is to be explainedThe tower of the wind power unit is abnormal in vibration, and the vibration condition of the unit is along with the radius R i,base And radius R base The ratio of (a) is increased and more serious;
radius R of maximum dynamic vibration circle of tower i,base Radius R of maximum reference vibration circle of tower base And then, the tower of the wind turbine generator to be tested vibrates normally.
The invention also provides a wind turbine generator system-based tower vibration early warning system, which comprises the following steps:
the reference vibration circle acquiring unit is used for acquiring the maximum reference vibration circle of the tower of the wind turbine generator to be tested under the rated power;
the dynamic vibration circle acquiring unit is used for acquiring the maximum dynamic vibration circle of the tower of the wind turbine generator to be tested under the operation condition;
and the judging unit is used for comparing the maximum reference vibration circle of the tower with the maximum dynamic vibration circle of the tower and judging whether the tower is abnormal or not according to a comparison result.
Specifically, the reference vibration circle acquiring unit includes:
the data acquisition module is used for acquiring the inclination azimuth angle and the vibration amplitude of the tower of the wind turbine generator to be tested under the rated power;
and the reference vibration circle drawing module is used for drawing the maximum reference vibration circle of the tower according to the obtained inclination azimuth angle and the vibration amplitude.
The dynamic vibration circle acquiring unit includes:
the system comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring real-time operation data of a wind turbine generator to be tested under an operation condition, and the operation data comprises incoming flow wind speed, a yaw area, a tower real-time inclination azimuth angle and a tower real-time vibration amplitude;
the bin dividing module is used for dividing the operation data by using the incoming flow wind speed and the yaw area to obtain a plurality of bin dividing areas;
the dynamic vibration circle drawing module is used for drawing to obtain a tower dynamic vibration circle of each compartment area according to the real-time inclination azimuth angle and the real-time vibration amplitude of the tower in each compartment area; and selecting a tower maximum dynamic vibration circle from the obtained tower dynamic vibration circles.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. A wind turbine generator tower vibration early warning method is characterized by comprising the following steps:
acquiring a maximum reference vibration circle of a tower of a wind turbine generator to be tested under rated power;
acquiring a maximum dynamic vibration circle of a tower of a wind turbine generator to be tested under the operation condition;
and comparing the maximum reference vibration circle of the tower with the maximum dynamic vibration circle of the tower, and judging whether the tower is abnormal or not according to the comparison result.
2. The wind turbine generator tower vibration early warning method based on claim 1 is characterized in that a tower maximum reference vibration circle of a wind turbine generator to be tested under rated power is obtained, and the specific method is as follows:
acquiring an inclination azimuth angle and a vibration amplitude of a tower of a wind turbine generator to be tested under rated power;
and drawing to obtain the maximum reference vibration circle of the tower according to the obtained inclination azimuth angle and the vibration amplitude.
3. The wind turbine generator tower vibration early warning method based on claim 2 is characterized in that the inclination azimuth angle and the vibration amplitude of the tower of the wind turbine generator to be tested under the rated power are obtained, and the specific method is as follows:
respectively acquiring acceleration data of the tower in the orthogonal direction and acceleration data of the tower in the horizontal direction under rated power in real time;
and performing polar coordinate conversion on the obtained acceleration data in the orthogonal direction of the tower and the obtained acceleration data in the horizontal direction of the tower to obtain the inclination azimuth angle and the vibration amplitude of the tower.
4. The wind turbine generator tower vibration early warning method based on claim 1 is characterized in that a maximum dynamic vibration circle of a tower of a wind turbine generator to be tested under an operating condition is obtained, and the specific method is as follows:
acquiring real-time operation data of a wind turbine generator to be tested under an operation condition, wherein the operation data comprises incoming flow wind speed, a yaw area, a tower real-time inclination azimuth angle and a tower real-time vibration amplitude;
dividing the operation data by using the incoming flow wind speed and the yaw area to obtain a plurality of divided areas;
drawing to obtain a tower dynamic vibration circle of each sub-bin region according to the real-time inclination azimuth angle and the real-time vibration amplitude of the tower in each sub-bin region;
and selecting a tower maximum dynamic vibration circle from the obtained tower dynamic vibration circles.
5. The wind turbine generator system tower vibration-based early warning method according to claim 4, wherein the operation data is binned by using an incoming flow wind speed and a yaw area to obtain a plurality of binned areas, and the specific method comprises the following steps:
setting a wind speed threshold, and dividing the incoming flow wind speed in the operation data by set step length to obtain a plurality of wind speed grades;
corresponding the incoming flow wind speed in the operation data to a corresponding wind speed grade; obtaining a plurality of operation subdata;
setting a yaw area threshold value, and dividing a yaw interval in each operation subdata by a set step length to obtain a plurality of area grades;
and corresponding the yaw area in each operation subdata to a corresponding area grade to obtain a plurality of bin dividing areas.
6. The wind turbine generator system-based tower vibration early warning method according to claim 1, wherein a maximum reference vibration circle of the tower is compared with a maximum dynamic vibration circle of the tower, and whether the tower is abnormal or not is judged according to a comparison result, and the specific method is as follows:
judging the size of the radius of the maximum dynamic vibration circle of the tower and the radius of the maximum reference vibration circle of the tower, wherein:
if the radius of the maximum dynamic vibration circle of the tower is larger than that of the maximum reference vibration circle of the tower, judging that the tower of the wind turbine generator to be tested vibrates abnormally; otherwise, judging that the tower of the wind turbine generator to be tested vibrates normally.
7. The utility model provides a based on wind turbine generator system pylon vibration early warning system which characterized in that includes following step:
the reference vibration circle acquiring unit is used for acquiring the maximum reference vibration circle of the tower of the wind turbine generator to be tested under the rated power;
the dynamic vibration circle acquiring unit is used for acquiring the maximum dynamic vibration circle of the tower of the wind turbine generator to be tested under the operation condition;
and the judging unit is used for comparing the maximum reference vibration circle of the tower with the maximum dynamic vibration circle of the tower and judging whether the tower is abnormal or not according to a comparison result.
8. The wind turbine tower vibration-based early warning system according to claim 7, wherein the reference vibration circle acquiring unit comprises:
the data acquisition module is used for acquiring the inclination azimuth angle and the vibration amplitude of the tower of the wind turbine generator to be tested under the rated power;
and the reference vibration circle drawing module is used for drawing the maximum reference vibration circle of the tower according to the obtained inclination azimuth angle and the vibration amplitude.
9. The wind turbine tower vibration-based early warning system of claim 7, wherein the dynamic vibration circle obtaining unit comprises:
the system comprises a data acquisition module, a data acquisition module and a data processing module, wherein the data acquisition module is used for acquiring real-time operation data of the wind turbine generator to be tested under the operation condition, and the operation data comprises incoming flow wind speed, a yaw area, a tower real-time inclination azimuth angle and a tower real-time vibration amplitude;
the bin dividing module is used for dividing the operation data by using the incoming flow wind speed and the yaw area to obtain a plurality of bin dividing areas;
the dynamic vibration circle drawing module is used for drawing to obtain a dynamic vibration circle of the tower in each bin dividing area according to the real-time inclination azimuth angle and the real-time vibration amplitude of the tower in each bin dividing area; and selecting the maximum dynamic vibration circle of the tower from the obtained plurality of dynamic vibration circles of the tower.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211182224.XA CN115539325B (en) | 2022-09-27 | 2022-09-27 | Tower vibration early warning method based on wind turbine generator |
| PCT/CN2022/142782 WO2024066101A1 (en) | 2022-09-27 | 2022-12-28 | Wind turbine generator-based tower vibration early warning method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211182224.XA CN115539325B (en) | 2022-09-27 | 2022-09-27 | Tower vibration early warning method based on wind turbine generator |
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| CN115539325A true CN115539325A (en) | 2022-12-30 |
| CN115539325B CN115539325B (en) | 2024-01-30 |
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| WO (1) | WO2024066101A1 (en) |
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| DE102016109122A1 (en) * | 2016-05-18 | 2017-11-23 | Wobben Properties Gmbh | Method for determining a vibration of a wind turbine tower |
| CN113513454A (en) * | 2021-08-18 | 2021-10-19 | 华能定边新能源发电有限公司 | Double-fed wind generating set tower barrel structure safety dynamic monitoring method |
| CN114294172A (en) * | 2021-11-11 | 2022-04-08 | 北京华能新锐控制技术有限公司 | Method and device for measuring first-order frequency of wind turbine generator tower |
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2022
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- 2022-12-28 WO PCT/CN2022/142782 patent/WO2024066101A1/en unknown
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| KR20130055149A (en) * | 2011-11-18 | 2013-05-28 | 엘에스전선 주식회사 | Tower monitoring system for wind turbine and method thereof |
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| CN107121122A (en) * | 2017-05-31 | 2017-09-01 | 上海应谱科技有限公司 | A kind of Wind turbines tower dynamic rate justifies analysis method |
| CN111488678A (en) * | 2020-04-01 | 2020-08-04 | 浙江运达风电股份有限公司 | Wind turbine generator tower accumulated fatigue damage assessment system and method |
| WO2021232675A1 (en) * | 2020-05-19 | 2021-11-25 | 西安热工研究院有限公司 | High-synchronization-precision distributed measurement system and method for wind turbine generator set |
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| CN113503231A (en) * | 2021-08-19 | 2021-10-15 | 华能盐城大丰新能源发电有限责任公司 | Tower inclination and foundation settlement evaluation method and system under variable working conditions of wind turbine generator |
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| Publication number | Publication date |
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| CN115539325B (en) | 2024-01-30 |
| WO2024066101A1 (en) | 2024-04-04 |
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