CN113833597A - Blade, wind generating set, monitoring system and monitoring method - Google Patents
Blade, wind generating set, monitoring system and monitoring method Download PDFInfo
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- CN113833597A CN113833597A CN202010513494.9A CN202010513494A CN113833597A CN 113833597 A CN113833597 A CN 113833597A CN 202010513494 A CN202010513494 A CN 202010513494A CN 113833597 A CN113833597 A CN 113833597A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008859 change Effects 0.000 claims abstract description 14
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- 238000006073 displacement reaction Methods 0.000 claims description 26
- 230000007246 mechanism Effects 0.000 claims description 20
- 238000011282 treatment Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 abstract description 12
- 238000012545 processing Methods 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 12
- 238000013461 design Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 239000011888 foil Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000012791 bagels Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
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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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- 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 application provides a blade, a wind generating set, a monitoring system and a monitoring method, and relates to the technical field of wind power generation. This wind generating set's blade includes: the blade comprises a blade body, at least one deformation piece and at least one deformation measuring device; the deformation pieces are arranged in the blade body, one end of each deformation piece is fixedly connected with the blade body, the other end of each deformation piece is fixedly connected with the blade body or the deformation measuring device, and the deformation pieces can change along with the deformation of the blade body; the deformation measuring device is fixedly connected with the blade body and used for measuring deformation data of the deformation piece in the operation process of the wind generating set, and the deformation data is used for determining the length change of the deformation piece. According to the embodiment of the application, the deformation condition of the blade body can be monitored in real time, the wind generating set is controlled to perform corresponding processing, and the blade is effectively prevented from sweeping the tower.
Description
Technical Field
The embodiment of the application relates to the technical field of wind power generation, in particular to a blade, a wind generating set, a monitoring system and a monitoring method.
Background
During operation of a blade of a wind turbine, in order to verify the blade design, it is usually necessary to measure the actual deformation of the blade under actual wind conditions. Meanwhile, in order to avoid the blade tip from being deformed excessively due to blade damage and further cause a tower sweeping accident, the blade needs to be controlled when the blade tip is deformed greatly.
At present, the deformation measurement of blade adopts installation measurement system on a tower section of thick bamboo more, remote ultrasonic monitoring, and this kind of mode belongs to fixed point monitoring, only can just can record data when the apex passes through from a tower section of thick bamboo department, and the deformation condition of blade body not only can not be monitored like this, also can't effectively prevent the function that the tower was swept to the blade in addition.
Disclosure of Invention
The embodiment of the application aims to provide a blade, a wind generating set, a monitoring system and a monitoring method, and aims to solve the technical problem that the deformation condition of a blade body cannot be monitored or the tower sweeping of the blade cannot be effectively prevented in the prior art.
In order to achieve the above object, in a first aspect, an embodiment of the present application provides a blade of a wind turbine generator system, including: the blade comprises a blade body, at least one deformation piece and at least one deformation measuring device;
the deformation pieces are arranged in the blade body, one end of each deformation piece is fixedly connected with the blade body, the other end of each deformation piece is fixedly connected with the blade body or the deformation measuring device, and the deformation pieces can change along with the deformation of the blade body;
the deformation measuring device is fixedly connected with the blade body and used for measuring deformation data of the deformation piece in the operation process of the wind generating set, and the deformation data is used for determining the length change of the deformation piece.
In one possible implementation manner, the at least one deformation piece comprises two deformation pieces, and the two deformation pieces are respectively arranged on the windward side and the leeward side of the blade body.
In one possible implementation, the deformation measuring device comprises a reel mechanism and a reading device;
the scroll mechanism and the reading device are both fixedly connected with the inner wall of the blade body;
one end of the deformation piece is fixedly connected with the blade body;
the other end of the deformation piece is fixedly connected with the reel mechanism and extends towards the blade tip of the blade body after surrounding a plurality of circles along the circumferential direction of the reel mechanism;
the part of the deformation piece, which is positioned in the length range of the blade, is connected with the blade body in a sliding way through at least one connecting piece;
the reading device comprises a roller and a counter fixedly connected with the roller, the roller is rotatably pressed on the deformation piece, the counter is used for reading the number of rotation turns of the roller, and the number of rotation turns is deformation data.
In one possible implementation, the blade comprises at least one of:
one end of the deformation piece is close to the blade tip of the blade body, and the other end of the deformation piece is close to the blade root of the blade body;
the deformation measuring device is positioned on the outer side of the baffle at the blade root of the blade body;
the section of the deformation piece is flat or round;
the deformation member is a tape measure.
In one possible implementation manner, both ends of the deformation piece are fixedly connected with the blade body;
the deformation piece is a telescopic elastic piece.
In one possible implementation, the deformation member is a strain gauge;
the deformation measuring device comprises a strain gauge;
the inner wall fixed connection of foil gage and blade body just is connected with the foil gage electricity for measure the resistance variation volume of foil gage, resistance variation volume are deformation data.
In one possible implementation, the deformation member is a spring plate;
the deformation measuring device comprises two displacement sensors;
two displacement sensor all with the inner wall fixed connection of blade body and respectively with the both ends fixed connection of spring leaf, displacement sensor is used for measuring the displacement variation of spring leaf tip, and the displacement variation is deformation data.
In a second aspect, an embodiment of the present application further provides a system for monitoring blade deformation of a wind turbine generator system, including: the blade and control unit of the first aspect;
the control unit is in communication connection with the deformation measuring device and used for acquiring deformation data of the deformation measuring device, determining the deformation length of the deformation piece according to the deformation data, determining whether the deformation length is greater than a first preset deformation threshold value, and if the deformation length is greater than the first preset deformation threshold value, controlling the wind generating set to perform at least one of the following processes: adjusting the variable pitch angle of the blades, controlling the wind generating set to stop running and giving an alarm.
In a third aspect, an embodiment of the present application further provides a wind turbine generator system, including: the blade of the first aspect, or the blade of the wind turbine generator set of the second aspect, is deformed.
In a fourth aspect, an embodiment of the present application further provides a method for monitoring blade deformation of a wind turbine generator system, which is applied to the system for monitoring blade deformation of a wind turbine generator system according to the third aspect, and includes the following steps:
acquiring deformation data of a deformation measuring device;
determining the deformation length of the deformation piece according to the deformation data;
determining whether the deformation length is greater than a first preset deformation threshold, and if the deformation length is greater than the first preset deformation threshold, controlling the wind generating set to perform at least one of the following treatments: adjusting the variable pitch angle of the blades, controlling the wind generating set to stop running and giving an alarm.
Compared with the prior art, the technical scheme of the embodiment of the application has at least the following beneficial technical effects:
the blade of this application embodiment is equipped with the deformation piece and warp measuring device, and the deformation piece can change along with the deformation of blade body, warp measuring device can be at wind generating set operation in-process, measure the deformation data of deformation piece, confirms the length variation of deformation piece according to the deformation data again, and the length variation of deformation piece has reflected the deformation condition of blade body promptly to realize the purpose of the deformation condition of real time monitoring blade body. Simultaneously, this application embodiment can control wind generating set according to the deformation condition of blade body and carry out corresponding processing, can effectively prevent that the blade from sweeping the tower.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a blade of a wind generating set according to an embodiment of the present application;
FIG. 2 is a schematic longitudinal sectional view of a portion of a blade of a wind turbine generator system according to an embodiment of the present application;
FIG. 3 is a schematic view in partial longitudinal section of a blade of a wind turbine according to another embodiment of the present application;
FIG. 4 is a schematic longitudinal sectional view of a portion of a blade of a wind turbine according to yet another embodiment of the present application;
FIG. 5 is a schematic structural diagram of a monitoring system for blade deformation of a wind generating set according to an embodiment of the application;
FIG. 6 is a flowchart of a method for monitoring blade deformation of a wind turbine generator system according to an embodiment of the present application.
Reference numerals:
1-a blade body;
2-a deformation member;
3-a deformation measuring device;
201-tape measure, 301-reel mechanism, 302-reading device;
202-strain gauge, 303-strain gauge;
203-spring plate, 304-displacement sensor;
4-a connector;
5-a control unit.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
An embodiment of the present application provides a blade of a wind generating set, and as shown in fig. 1, the blade includes: a blade body 1, at least one deformation element 2 and at least one deformation measuring device 3.
In the blade body 1 was all located to the deformation piece 2, the one end and the blade body 1 fixed connection of deformation piece 2, the other end and the blade body 1 or the deformation measuring device 3 fixed connection of deformation piece 2, deformation piece 2 can change along with the deformation of blade body 1.
The deformation measuring device 3 is fixedly connected with the blade body 1 and used for measuring deformation data of the deformation part 2 in the running process of the wind generating set, and the deformation data is used for determining the length change of the deformation part 2.
The inventor of the application considers that along with the development of the flexibility and light weight design technology of the blade, the rigidity of the blade is reduced, the deformation is increased, the clearance is reduced, and in order to ensure the operation safety of the blade and optimize the blade design, the prevention of the real deformation condition of the blade and the sweeping of the tower becomes more and more important.
The deformation piece 2 of this application embodiment can change along with the deformation of blade body 1, and deformation measuring device 3 can be at wind generating set operation in-process, measures the deformation data of deformation piece 2, confirms the length variation of deformation piece 2 according to the deformation data again, and the length variation of deformation piece 2 has reflected the deformation condition of blade body promptly to the mesh of the deformation condition of realization control blade body. Meanwhile, the wind generating set can be controlled to perform corresponding processing according to the deformation condition of the blade body 1, and the blade can be effectively prevented from sweeping the tower.
The blade of this application embodiment can be the control of the deformation condition of testing the blade before carrying out blade production, then according to actual needs and the true deformation condition adjustment blade's of blade rigidity and quality for the blade can satisfy when working under the effect of actual wind speed as far as possible flexibility and lightweight, and the flexibility is convenient for install and reduce cost with lightweight blade. Meanwhile, the blade of the embodiment of the application can also be arranged on a running wind generating set, the deformation condition of the blade body is monitored in real time, and the wind generating set is conveniently controlled to carry out corresponding treatment.
In some embodiments, referring to fig. 1, the at least one deformation member 2 includes two deformation members 2, where the two deformation members 2 are respectively disposed on the windward side and the leeward side of the blade body 1, so as to facilitate monitoring of deformation conditions of the windward side and the leeward side, and determine whether the blade body 1 deforms in a direction approaching the tower or in a direction away from the tower according to the deformation conditions of the windward side and the leeward side.
When the blade body 1 deforms towards the direction close to the tower, the variable pitch angle of the blade can be adjusted or the wind generating set is controlled to stop running according to the deformation condition of the blade. Optionally, the specific monitoring process includes: acquiring deformation data of the deformation measuring device 3, determining the deformation length of the deformation piece 2 according to the deformation data, and determining whether the deformation length is greater than a first preset deformation threshold value; if the deformation length is larger than a first preset deformation threshold value, controlling the wind generating set to stop running, and preventing blades from sweeping the tower effectively; if the deformation length is smaller than a first preset deformation threshold value, the variable pitch angle of the blade is adjusted until the deformation length is not smaller than a second preset deformation threshold value, and the first preset deformation threshold value is larger than the second preset deformation threshold value.
When the blade body 1 deforms towards the direction far away from the tower, the wind generating set can be controlled to stop running, and the yaw direction can be checked and adjusted.
Optionally, each deformation element 2 is connected to a corresponding deformation measuring device 3.
In some embodiments, referring to fig. 2, the deformation measuring device 3 comprises a reel mechanism 301 and a reading device 302; the scroll mechanism 301 and the reading device 302 are both fixedly connected with the inner wall of the blade body 1, and one end of the deformation piece 2 is fixedly connected with the blade body 1; the other end of the deformation piece 2 is fixedly connected with the reel mechanism 301, and extends towards the blade tip of the blade body 1 after surrounding a plurality of circles along the circumferential direction of the reel mechanism 301.
The part of the deformation piece 2 located in the length range of the blade is slidably connected with the blade body 1 through at least one connecting piece 4. The connecting piece 4 can enable the deformation piece 2 to be in contact with or attached to the blade body 1, so that the deformation path of the deformation piece 2 is fixed, and the deformation condition of the blade can be reflected truly. But the mode of sliding connection is convenient for the deformation piece 2 can stretch out and retract the back from reel mechanism 301, can slide on blade body 1, and then when the deformation of blade body 1 for the length that deformation piece 2 is located the blade length within range changes, realizes the purpose of the deformation condition of real-time reflection blade body 1.
The reading device 302 comprises a roller and a counter fixedly connected with the roller, the roller is rotatably pressed on the deformation part 2, the counter is used for reading the number of rotation turns of the roller, and the number of rotation turns is deformation data. The number of turns corresponds with the flexible length of the deformation member 2, can obtain the deformation length of the deformation member 2 through the number of turns of rotation, and then reflects the deformation condition of the blade body 1.
Alternatively, the roller and the counter may be integrated, the reading device 302 is close to the telescopic outlet of the deformation member 2 of the reel mechanism 301, the roller converts the linear movement distance of the deformation member 2 into the rotation distance of the roller, and the counter calculates the actual movement distance of the roller according to the number of turns of the roller.
Alternatively, with the non-deformation state of the blade body 1 as a zero point, knowing the circumference of each rotation of the roller, the deformation length of the deformation member 2 is obtained according to the calculation formula of the rotation number of the roller and the deformation length. Specifically, the deformation length is the number of turns by the roller circumference.
In some embodiments, as shown in connection with fig. 1 and 2, the blade includes at least one of:
one end of the deformation piece 2 is close to the blade tip of the blade body 1, the other end of the deformation piece 2 is close to the blade root of the blade body 1, and the deformation piece 2 almost covers the whole length range of the blade body 1, so that the deformation condition of the whole blade can be reflected more truly.
The deformation piece 2 is flat or circular in cross section. The section of the deformation piece 2 is flat, so that the roller can be conveniently pressed on the deformation piece 2 and can roll along with the length change of the deformation piece 2. The cross-section of the deformation part 2 is circular, the outer edge of the roller can be correspondingly arranged to be concave, and the roller is matched with the shape of the deformation part 2, so that the roller can roll along with the sliding of the deformation part 2.
The deformation member 2 is a tape 201, and can be wound around the circumference of the winding mechanism 301, and then extended or retracted from the retractable buckle of the winding mechanism 301 for advancing or retracting the tape 201.
Alternatively, as an example, one end of the tape 201 is connected to the blade tip and the other end is located at the blade root, and the tip located at the blade tip may be located at other positions of the blade, such as 70% or 50% of the length of the blade body 1, according to the actual requirement. The attachment 4 may be a saddle clamp and the reel mechanism 301 relies on the spring force to effect tensioning of the tape measure.
Alternatively, the deformation measuring device 3 may be configured similarly to a smart tape measure, and may measure and output a deformation reading. For example, a Bagel intelligent measuring tape is placed on the surface of an object to be measured to slide, the sliding distance is the distance to be measured, the principle of the sliding distance is consistent with a method for counting the driving mileage of an automobile, and the measurement is carried out according to the number of rotation turns.
Alternatively, when the blade is located in the mold, the deformation amount of the blade is 0, the deformation measuring device 3 is in the initial state, and the number of turns is 0.
In some embodiments, as shown in fig. 2 and 3, both ends of the deformation member 2 are fixedly connected with the blade body 1; the deformation element 2 is a flexible elastic element.
Optionally, the elastic member is a strain gauge 202 or a spring plate 203.
In some embodiments, referring to fig. 3, the deformation member 2 is a strain gauge 202; the deformation measuring device 3 includes a strain gauge 303, the strain gauge 303 is fixedly connected to the inner wall of the blade body 1 and electrically connected to the strain gauge 202, and is configured to measure a resistance variation of the strain gauge 202, where the resistance variation is deformation data.
Optionally, the strain gauge 202 is mechanically deformed following the deformation of the blade body 1, the resistance values of the strain gauge 202 after deformation are different, the strain gauge 303 is used for measuring the resistance value of the strain gauge 202, the resistance value of the strain gauge 202 corresponds to the deformation length of the strain gauge 202, the deformation length of the strain gauge 202 can be obtained through the resistance value of the strain gauge 202, and the deformation condition of the blade body 1 is further reflected.
In some embodiments, referring to fig. 4, the deformation member 2 is a spring plate 203; the deformation measuring device 3 comprises two displacement sensors 304, wherein the two displacement sensors 304 are fixedly connected with the inner wall of the blade body 1 and respectively fixedly connected with the two ends of the spring piece 203, the displacement sensors 304 are used for measuring the displacement variation of the end part of the spring piece 203, and the displacement variation is deformation data. The two displacement sensors 304 are respectively connected with two ends of the spring plate 203, so as to be convenient for respectively measuring displacement variation of two ends of the spring plate 203. The current distance between the two ends of the spring piece 203 can be obtained according to the displacement variation of the two ends of the spring piece 203, and the deformation length of the spring piece 203 can be obtained according to the current distance between the two ends of the spring piece 203 and the initial distance between the two ends of the spring piece 203, so that the deformation condition of the blade body 1 is reflected.
Based on the same inventive concept, an embodiment of the present application further provides a monitoring system for blade deformation of a wind turbine generator system, as shown in fig. 5, the monitoring system for blade deformation of a wind turbine generator system includes: the blade and control unit 5 of the present embodiment.
The control unit 5 is in communication connection with the deformation measuring device 3 and is used for acquiring deformation data of the deformation measuring device 3, determining the deformation length of the deformation piece 2 according to the deformation data, determining whether the deformation length is greater than a first preset deformation threshold value, and if the deformation length is greater than the first preset deformation threshold value, controlling the wind generating set to perform at least one of the following processes: adjusting the variable pitch angle of the blades, controlling the wind generating set to stop running and giving an alarm.
Optionally, the control unit 5 is specifically configured to obtain the number of rotation turns of the reel mechanism 301, and obtain the deformation length of the deformation piece 2 according to the corresponding relationship between the number of rotation turns and the telescopic length of the deformation piece 2.
Optionally, the control unit is further configured to obtain the deformation length of the deformation member 2 by taking the non-deformation state of the blade body 1 as a zero point and taking the number of turns of the roller and the deformation length as a product of the number of turns and a preset roller circumference.
Optionally, the control unit 5 is specifically configured to obtain a resistance variation of the strain gauge 303, and obtain a deformation length of the strain gauge 202 according to a correspondence between the resistance variation and a length of the strain gauge 202.
Optionally, the control unit 5 is specifically configured to obtain displacement variation amounts of the two displacement sensors 304, obtain a current distance between two ends of the spring plate 203 according to the displacement variation amounts of the two ends of the spring plate 203, and obtain a deformation length of the spring plate 203 according to the current distance between two ends of the spring plate 203 and an initial distance between two ends of the spring plate 203.
The inventors of the present application have found that when a steel plate having a thickness is subjected to a bending load, if the upper surface is in tension and the lower surface is in compression, the length of deformation of the upper surface is greater than that of the lower surface. If the method is applied to deformation of the blade body 1, when the deformation length of the windward side is greater than that of the leeward side, the blade is indicated to be in normal operation, and when the deformation length of the windward side is less than that of the leeward side, the blade does not face the incoming wind direction, and the yaw direction needs to be adjusted. Therefore, the control unit 5 of the embodiment of the present application needs to determine the deformation direction of the blade body 1, and when the blade body deforms in a direction approaching the tower, the deformation length of the windward side is greater than the deformation length of the leeward side, which indicates that the blade operates normally and the problem of blade tower sweeping may occur; when the tower barrel deforms in the direction away from the tower barrel, the deformation length of the windward side is smaller than that of the leeward side, and the yaw direction needs to be adjusted.
Optionally, the control unit 5 is further configured to determine a deformation direction of the blade body 1 according to deformation data of the deformation measuring devices on the windward side and the leeward side, where the deformation direction includes: the deformation is towards the direction close to the tower barrel and towards the direction far away from the tower barrel.
Optionally, the control unit 5 is specifically configured to determine the deformation lengths of the windward side and the leeward side according to the deformation data of the deformation measuring devices of the windward side and the leeward side; and comparing the deformation length of the windward side with the deformation length of the leeward side, determining that the blade body 1 deforms towards the direction close to the tower when the deformation length of the windward side is greater than the deformation length of the leeward side, and determining that the blade body 1 deforms towards the direction far away from the tower when the deformation length of the windward side is less than the deformation length of the leeward side. At this moment, at least one deformation piece 2 includes two deformation pieces 2, and two deformation pieces 2 are located the windward side and the leeward side of blade body 1 respectively.
Optionally, the control unit 5 is further configured to determine whether the deformation length is greater than a first preset deformation threshold when the blade body 1 deforms in a direction approaching the tower; if the deformation length is larger than a first preset deformation threshold value, controlling the wind generating set to stop running, and preventing blades from sweeping the tower effectively; if the deformation length is smaller than a first preset deformation threshold value, adjusting the variable pitch angle of the blade until the deformation length is not smaller than a second preset deformation threshold value, wherein the first preset deformation threshold value is larger than the second preset deformation threshold value; when the blade body 1 deforms away from the tower, the wind generating set can be controlled to stop running so as to check and adjust the yaw direction.
Optionally, the control unit 5 is disposed in a fan data system of the wind turbine generator system, and may be displayed on a remote computer in real time, or may be regulated and controlled by the control system according to measured data, for example, when the deformation data exceeds a certain range, emergency braking or pitch-controlled load reduction measures are performed on the entire wind turbine generator system. During the monitoring and verification of a prototype, the blade deformation data under the actual wind speed can be compared with the design value, so that the blade design is verified, and the follow-up blade design improvement is guided.
Based on the same inventive concept, the embodiment of the present application further provides a wind turbine generator system, including: the blade of this application embodiment, or the monitored control system of wind generating set's blade deformation of this application embodiment.
The inventor of the application considers that when the wind generating set runs, the relative deviation of the windward side and the leeward side of the running blade based on the zero point after calibration can be collected, the design value is compared according to the data, the comparison between the actual running deformation condition and the theoretical value of the blade can be obtained, and therefore the design is optimized. In addition, when the wind generating set operates, if the wind speed data is combined, the data is found to be significantly deviated from a theoretical value, measures such as variable pitch, yaw and alarm can be adopted for safety protection, and the specific deviation can be specifically determined according to the type of the blade, the rigidity of the blade and different wind speeds.
Based on the same inventive concept, an embodiment of the present application further provides a method for monitoring blade deformation of a wind turbine generator system, as shown in fig. 6, which is applied to a system for monitoring blade deformation of a wind turbine generator system of the embodiment of the present application, and the system for monitoring blade deformation of a wind turbine generator system includes the following steps:
s601, deformation data of the deformation measuring device 3 is acquired.
Alternatively, as shown in fig. 2 and 4 in combination, the deformation data includes the number of rotations of the reel mechanism 301, the amount of change in the resistance value of the strain gauge 202, and the amount of change in the displacement of both ends of the spring piece 203.
And S602, determining the deformation length of the deformation piece 2 according to the deformation data.
Optionally, in step S602, if the deformation data is the number of turns, the deformation length of the deformation member 2 is obtained according to the corresponding relationship between the number of turns and the stretching length of the deformation member 2.
In step S602, if the deformation data is a resistance variation, the deformation length of the strain gauge 202 is obtained according to the correspondence between the resistance variation and the length of the strain gauge 202.
In step S602, if the deformation data is the displacement variation of the two displacement sensors 304, the current distance between the two ends of the spring plate 203 is obtained according to the displacement variation of the two ends of the spring plate 203, and the deformation length of the spring plate 203 is obtained according to the current distance between the two ends of the spring plate 203 and the initial distance between the two ends of the spring plate 203.
S603, determining whether the deformation length is greater than a first preset deformation threshold, and if the deformation length is greater than the first preset deformation threshold, controlling the wind generating set to perform at least one of the following treatments: adjusting the variable pitch angle of the blades, controlling the wind generating set to stop running and giving an alarm.
Optionally, if the deformation length is greater than a first preset deformation threshold, controlling the wind generating set to stop running, so as to prevent effectively the blade from sweeping the tower; if the deformation length is smaller than a first preset deformation threshold value, the variable pitch angle of the blade is adjusted until the deformation length is not smaller than a second preset deformation threshold value, and the first preset deformation threshold value is larger than the second preset deformation threshold value.
Optionally, the wind generating set can be controlled to stop running, and meanwhile, an alarm can be given out.
Optionally, as shown in fig. 1, the at least one deformation element 2 includes two deformation elements 2, and the two deformation elements 2 are respectively disposed on the windward side and the leeward side of the blade body 1.
Between step S601 and step S602, the method further includes: according to the deformation data of the deformation measuring device of the windward side and the leeward side, the deformation direction of the blade body 1 is determined, and the deformation direction comprises the following steps: the deformation is towards the direction close to the tower barrel and towards the direction far away from the tower barrel.
Optionally, determining the deformation direction of the blade body 1 according to the deformation data of the deformation measuring devices on the windward side and the leeward side includes: determining the deformation lengths of the windward side and the leeward side according to the deformation data of the deformation measuring devices of the windward side and the leeward side; and comparing the deformation length of the windward side with the deformation length of the leeward side, determining that the blade body 1 deforms towards the direction close to the tower when the deformation length of the windward side is greater than the deformation length of the leeward side, and determining that the blade body 1 deforms towards the direction far away from the tower when the deformation length of the windward side is less than the deformation length of the leeward side.
Step S603 includes: when the blade body 1 deforms towards the direction close to the tower, determining whether the deformation length is larger than a first preset deformation threshold value; if the deformation length is larger than a first preset deformation threshold value, controlling the wind generating set to stop running, and preventing blades from sweeping the tower effectively; if the deformation length is smaller than a first preset deformation threshold value, adjusting the variable pitch angle of the blade until the deformation length is not smaller than a second preset deformation threshold value, wherein the first preset deformation threshold value is larger than the second preset deformation threshold value; when the blade body 1 deforms away from the tower, the wind generating set can be controlled to stop running so as to check and adjust the yaw direction.
The application of the method and the device can at least achieve the following technical effects:
(1) the deformation piece 2 of this application embodiment can change along with the deformation of blade body 1, and deformation measuring device 3 can be at wind generating set operation in-process, measures the deformation data of deformation piece 2, confirms the length variation of deformation piece 2 according to the deformation data again, and the length variation of deformation piece 2 has reflected the deformation condition of blade body promptly to the mesh of the deformation condition of realization control blade body. Meanwhile, the wind generating set can be controlled to perform corresponding processing according to the deformation condition of the blade body 1, and the blade can be effectively prevented from sweeping the tower.
(2) The blade of this application embodiment can be the control of the deformation condition of testing the blade before carrying out blade production, then according to actual needs and the true deformation condition adjustment blade's of blade rigidity and quality for the blade can satisfy when working under the effect of actual wind speed as far as possible flexibility and lightweight, and the flexibility is convenient for install and reduce cost with lightweight blade. Meanwhile, the blade of the embodiment of the application can also be arranged on a running wind generating set, the deformation condition of the blade body is monitored in real time, and the wind generating set is conveniently controlled to carry out corresponding treatment.
(3) The windward side and the leeward side of blade body 1 can be located to the deformation piece 2 of this application embodiment, are convenient for monitor the deformation condition of windward side and leeward side, according to the deformation condition of windward side and leeward side, judge that blade body 1 is out of shape towards being close to a tower section of thick bamboo direction or keeping away from a tower section of thick bamboo direction and warp to be convenient for wind generating set carries out corresponding control.
Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description only, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. When an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. A blade for a wind power plant, comprising: the blade comprises a blade body (1), at least one deformation piece (2) and at least one deformation measuring device (3);
the deformation pieces (2) are arranged in the blade body (1), one end of each deformation piece (2) is fixedly connected with the blade body (1), the other end of each deformation piece (2) is fixedly connected with the blade body (1) or the deformation measuring device (3), and the deformation pieces (2) can change along with the deformation of the blade body (1);
the deformation measuring device (3) is fixedly connected with the blade body (1) and used for measuring deformation data of the deformation piece (2) in the running process of the wind generating set, and the deformation data is used for determining the length change of the deformation piece (2).
2. Blade of a wind park according to claim 1, wherein the at least one deformation member (2) comprises two deformation members (2);
the two deformation pieces (2) are respectively arranged on the windward side and the leeward side of the blade body (1).
3. Blade of a wind park according to claim 1 or 2, wherein the deformation measuring device (3) comprises a reel mechanism (301) and a reading device (302);
the reel mechanism (301) and the reading device (302) are both fixedly connected with the inner wall of the blade body (1);
one end of the deformation piece (2) is fixedly connected with the blade body (1);
the other end of the deformation piece (2) is fixedly connected with the reel mechanism (301), and extends towards the blade tip direction of the blade body (1) after surrounding a plurality of circles along the circumferential direction of the reel mechanism (301);
the part of the deformation piece (2) located in the length range of the blade is connected with the blade body (1) in a sliding mode through at least one connecting piece (4);
the reading device (302) comprises a roller and a counter fixedly connected with the roller, the roller is rotationally pressed on the deformation piece (2), the counter is used for reading the number of turns of the roller, and the number of turns of the rotation is the deformation data.
4. A blade for a wind park according to claim 3, wherein the blade comprises at least one of:
one end of the deformation piece (2) is close to the blade tip of the blade body (1), and the other end of the deformation piece (2) is close to the blade root of the blade body (1);
the deformation measuring device (3) is positioned outside the baffle at the blade root of the blade body (1);
the section of the deformation piece (2) is flat or circular;
the deformation piece (2) is a measuring tape (201).
5. The blade of a wind generating set according to claim 1 or 2, characterized in that both ends of the deformation piece (2) are fixedly connected with the blade body (1);
the deformation piece (2) is a telescopic elastic piece.
6. Blade of a wind park according to claim 5, wherein the deformation member (2) is a strain gauge (202);
the deformation measuring device (3) comprises a strain gauge (303);
the strain gauge (303) is fixedly connected with the inner wall of the blade body (1) and electrically connected with the strain gauge (202) and used for measuring the resistance variation of the strain gauge (202), and the resistance variation is the deformation data.
7. Blade of a wind park according to claim 5, wherein the deformation member (2) is a spring leaf (203);
the deformation measuring device (3) comprises two displacement sensors (304);
two displacement sensor (304) all with the inner wall fixed connection of blade body (1) and respectively with the both ends fixed connection of spring leaf (203), displacement sensor (304) are used for measuring the displacement variation of spring leaf (203) tip, the displacement variation is deformation data.
8. A monitoring system for blade deformation of a wind generating set is characterized by comprising: a blade and control unit (5) according to any of claims 1-7;
the control unit (5) is in communication connection with the deformation measuring device (3) and is used for acquiring deformation data of the deformation measuring device (3), determining the deformation length of the deformation piece (2) according to the deformation data, determining whether the deformation length is larger than a first preset deformation threshold value or not, and if the deformation length is larger than the first preset deformation threshold value, controlling the wind generating set to perform at least one of the following processes: adjusting the variable pitch angle of the blades, controlling the wind generating set to stop running and giving an alarm.
9. A wind turbine generator set, comprising: a system for monitoring deformation of a blade according to any of claims 1-7, or a blade of a wind park according to claim 8.
10. A method for monitoring blade deformation of a wind turbine generator system, applied to the system for monitoring blade deformation of a wind turbine generator system according to claim 8, comprising the steps of:
-acquiring deformation data of the deformation measuring device (3);
determining the deformation length of the deformation piece (2) according to the deformation data;
determining whether the deformation length is greater than a first preset deformation threshold, and if the deformation length is greater than the first preset deformation threshold, controlling the wind generating set to perform at least one of the following treatments: adjusting the variable pitch angle of the blades, controlling the wind generating set to stop running and giving an alarm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010513494.9A CN113833597A (en) | 2020-06-08 | 2020-06-08 | Blade, wind generating set, monitoring system and monitoring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010513494.9A CN113833597A (en) | 2020-06-08 | 2020-06-08 | Blade, wind generating set, monitoring system and monitoring method |
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| KR20140014898A (en) * | 2012-07-27 | 2014-02-06 | 현대중공업 주식회사 | Ice detecting system of windmill blade |
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| WO2007082821A1 (en) * | 2006-01-19 | 2007-07-26 | Siemens Aktiengesellschaft | Rotor blade of wind power plant |
| CN102439301A (en) * | 2009-04-24 | 2012-05-02 | 三菱重工业株式会社 | Load measuring device, method and program |
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Application publication date: 20211224 |