CN105822508A - System for monitoring blade deformation of wind power generation equipment - Google Patents
System for monitoring blade deformation of wind power generation equipment Download PDFInfo
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- CN105822508A CN105822508A CN201610291233.0A CN201610291233A CN105822508A CN 105822508 A CN105822508 A CN 105822508A CN 201610291233 A CN201610291233 A CN 201610291233A CN 105822508 A CN105822508 A CN 105822508A
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Abstract
The invention discloses a system for monitoring blade deformation of wind power generation equipment. The system comprises at least one pulling string, at least one measurement device, a signal acquisition device and a signal processing device, wherein the at least one pulling string is axially laid along the inner surface of a blade; one end of each pulling string is fixed at a position, close to a blade tip, of the inner surface of the blade, and the other end of each pulling string is connected with one of the at least one measurement device through an elastic element; each pulling string drives the corresponding elastic element to stretch along with the deformation of the blade; each measurement device is fixed at a position, close to a hub, of the inner surface of the blade, and is suitable for outputting a measurement signal according to stretching movement of the corresponding elastic element driven by the correspondingly connected pulling string; the signal acquisition device is separately connected with the at least one measurement device and the signal processing device, and is suitable for acquiring and transmitting the at least one measurement signal output by the at least one measurement device to the signal processing device; and the signal processing device is suitable for calculating the deformation quantity of the blade according to the at least one measurement signal.
Description
Technical field
The present invention relates to blade state monitoring field, particularly relate to the system of a kind of blade deformation monitoring wind power plant.
Background technology
Wind-power electricity generation, as a kind of important renewable new forms of energy, receives significant attention.And the blade of wind power plant is as capturing the key position of wind energy in wind power generating set, its health status directly influences the operation of whole wind power system.Structure and the stress of blade are considerably complicated, owing to the working environment of blade is the most severe, spring, summer, autumn and winter, scorching summer and freezing winter, thunder and lightning, hail, sleet, sand and dust etc. are likely to fan blade is produced damage at any time, are easiest to position accident occur during therefore blade becomes wind power plant.According to statistics, the accident that blade injury produces accounts for 1/3rd of the total accident of blower fan.Common fan blade there will be the typical fatigue failure such as crackle, layering, space and unsticking afterwards suffering to damage, and these damages constantly accumulate eventually result in leaf destruction along with the operation of blade.During blade generation fatigue failure to fracture, blade operationally each several part can occur to strain in various degree or deformation.Generally necessary shutdown maintenance, the most once blade broken during blade generation damage accident, the most probably damage tower, and this will cause the maintenance cost of great number, also brings the biggest economic loss to wind energy turbine set.Therefore, if the health status of blade can effectively be monitored, the machine halt trouble that fan blade causes must effectively be reduced, it is to avoid produce great economic loss.
At present, the blade of wind power plant strains common monitoring means foil gauge stress monitoring method and FBG monitoring method etc..These monitoring methods suffer from its defect type being suitable for and pluses and minuses, its technology requires harsher, monitoring process is affected by running environment, weather conditions and other factors, and typically require the intervention analyzing personnel by complicated detecting instrument equipment and specialty and just can do result judgement, significantly increase monitoring cost and universal degree of difficulty.
It is thus desirable to the scheme of the blade deformation of a kind of novel monitoring wind power plant.
Summary of the invention
In consideration of it, the invention provides the scheme of the blade deformation of a kind of new monitoring wind power plant, to try hard to solve or at least alleviate the problem existed above.
According to an aspect of the present invention, provide the system of a kind of blade deformation monitoring wind power plant, including at least one bracing wire, at least one measurement apparatus, signal pickup assembly and signal processing apparatus, at least one of which bracing wire is axially laid along leaflet inner faces, leaflet inner faces nearly blade tip position is fixed in one end of every bracing wire, the other end is connected by flexible member with at least one measurement apparatus, and bracing wire is with the deformation band dynamic elasticity element generation extensional motion of blade；At least one measurement apparatus is both secured to the nearly hub positions of leaflet inner faces, is suitable to the extensional motion output according to its bracing wire connected drives flexible member to occur and measures signal；Signal pickup assembly is connected with at least one measurement apparatus and signal processing apparatus respectively, is suitable to gather and transmit at least one measurement signal of at least one measurement apparatus output to signal processing apparatus；Signal processing apparatus is suitable to measure signal according at least one and calculates the deformation quantity of blade.
Alternatively, in a system in accordance with the invention, wherein signal processing apparatus is further adapted for judging whether the deformation quantity of blade exceedes threshold value, the most then send alarm.
Alternatively, in a system in accordance with the invention, the one or more fixing devices being suitable to that bracing wire is fixed on leaflet inner faces are also included.
Alternatively, in a system in accordance with the invention, wherein fixing device includes at least one through hole corresponding with at least one bracing wire position or fluting, and at least one bracing wire is each passed through through hole or the fluting of correspondence.
Alternatively, in a system in accordance with the invention, wherein the spacing of every bracing wire is equal.
Alternatively, in a system in accordance with the invention, wherein quality of wire drawing is light, intensity is high and stroke is little.
Alternatively, in a system in accordance with the invention, the length of the most each bar bracing wire is equal.
Alternatively, in a system in accordance with the invention, the length of the most each bar bracing wire is unequal.
Alternatively, in a system in accordance with the invention, wherein signal processing apparatus is suitable to calculate the deformation quantity of blade difference section according at least one measurement signal.
Alternatively, in a system in accordance with the invention, wherein measurement apparatus is pulling force sensor, measures the pulling force that signal designation bracing wire drives flexible member stretching to produce.
Alternatively, in a system in accordance with the invention, wherein measurement apparatus is displacement transducer, measures the displacement that signal designation bracing wire drives flexible member stretching to produce.
Alternatively, in a system in accordance with the invention, wherein measurement apparatus is stay-supported type displacement sensor, and described bracing wire is the bracing wire of stay-supported type displacement sensor.
The scheme of the blade deformation of the monitoring wind power plant according to the present invention, by the bracing wire axially laid along leaflet inner faces, and obtained the deformation quantity of blade with the stretching of blade-shaped variable speed dynamic elasticity element by bracing wire, thus the damage status of blade each several part the most effectively and can be reflected in real time, significantly reduce the cost of monitoring simultaneously.
Accompanying drawing explanation
In order to realize above-mentioned and relevant purpose; herein in conjunction with explained below and accompanying drawing, some illustrative aspect is described; these aspects indicate can to put into practice the various modes of principles disclosed herein, and all aspects and equivalence aspect be intended to fall under in the range of theme required for protection.By reading in conjunction with the accompanying detailed description below, above-mentioned and other purpose, feature and the advantage of the disclosure will be apparent from.Throughout the disclosure, identical reference generally refers to identical parts or element.
Fig. 1 shows the structural representation of the system 100 of the blade deformation of monitoring wind power plant according to an illustrative embodiment of the invention；
Fig. 2 shows bracing wire schematic diagram when blade according to an illustrative embodiment of the invention is undeformed；
Fig. 3 shows bracing wire schematic diagram during blade deformation according to an illustrative embodiment of the invention；And
Fig. 4 shows the structural representation of fixing device 150 according to an illustrative embodiment of the invention.
Detailed description of the invention
It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although accompanying drawing showing the exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure and should not limited by embodiments set forth here.On the contrary, it is provided that these embodiments are able to be best understood from the disclosure, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
Blade is as capturing the key position of wind energy in wind power generating set, its health status directly influences the operation of whole wind power system.The blade of wind power plant is the longest, and in operation process, under wind-force effect, each position all can occur deformation in various degree.And along with blade runs the growth of time, the fatigue damage of blade can gradually increase, and the accumulation of these fatigues can reduce blade reliability of operation, and the serious blower fan that then can cause breaks down.Therefore, blade deformation quantity operationally be sized to effectively reflect the health status that blade is overall.
Fig. 1 shows the structural representation of the system 100 of the blade deformation of monitoring wind power plant according to an illustrative embodiment of the invention.As it is shown in figure 1, the system 100 of the blade deformation of monitoring wind power plant includes at least one bracing wire 110, at least one measurement apparatus 120, signal pickup assembly 130 and signal processing apparatus 140.
Bracing wire 110 usually light weight, intensity is high, the wire rod that stroke is little, and axially lays along leaflet inner faces, and wherein the spacing of every bracing wire can be equal.Leaflet inner faces nearly blade tip position, the position that this position usually blade easily deforms upon are fixed in one end of every bracing wire 110.The measurement apparatus 120 that the other end of bracing wire 110 is then corresponding with one is connected by flexible member, such as, connected by spring, and measurement apparatus 120 is then fixed on the nearly hub positions of leaflet inner faces.
Fig. 2 and Fig. 3 respectively illustrate blade properly functioning time and the view of blade bracing wire when deforming upon.Apparently, when blade deforms upon, the bracing wire 110 axially laid also can drive its flexible member generation extensional motion connected therewith, and signal is measured in the extensional motion output driving flexible member to occur by the measurement apparatus 120 that flexible member is connected according to this bracing wire with bracing wire.It is to be appreciated that the stretching that bracing wire drives flexible member to occur exists direct relation with blade-shaped range degree, therefore, it can the stretching by monitoring bracing wire drives flexible member to occur and realize the monitoring to blade-shaped range degree.
In reality is implemented, measuring the measurement apparatus 120 usually sensor, such as pulling force sensor, displacement transducer etc. of stretching, the present invention is without limitation.
According to one embodiment of present invention, measurement apparatus 120 is pulling force sensor, when blade deforms upon, bracing wire drives flexible member stretching to produce pulling force, touching the pulling force sensor being connected with this bracing wire, the signal designation bracing wire of measuring of now pulling force sensor output drives flexible member to stretch the pulling force produced.
According to another embodiment of the invention, measurement apparatus 120 is displacement transducer, when blade deforms upon, bracing wire drives flexible member stretching to produce displacement, touching the pulling force sensor being connected with this bracing wire, the signal designation bracing wire of measuring of now pulling force sensor output drives flexible member to stretch the displacement produced.
Wherein, measurement apparatus 120 can also be stay-supported type displacement sensor, is laid on the bracing wire of leaflet inner faces accordingly then for the bracing wire of this stay-supported type displacement sensor self.
Signal pickup assembly 130 is connected with at least one measurement apparatus 120 and signal processing apparatus 140 the most respectively, is suitable to gather and transmit at least one measurement signal of at least one measurement apparatus output to signal processing apparatus 140.Signal processing apparatus 140 calculates the deformation quantity of blade according at least one measurement signal that signal pickup assembly 130 gathers.
According to one embodiment of present invention, a bracing wire is axially laid along leaflet inner faces, the fixing end with leaflet inner faces of now bracing wire 110 is usually located at blade tip position, in order to the deformation quantity measuring the blade that signal calculates that signal processing apparatus 140 gathers according to signal pickup assembly 130 can characterize the health degree that blade is overall.
According to another embodiment of the invention, axially laying a plurality of bracing wire along leaflet inner faces, the length of a plurality of bracing wire can be identical, and the most all bracing wires are positioned in same cross-sectional periphery with the fixing end of leaflet inner faces.Now signal processing apparatus 140 can calculate the deformation quantity of multiple blade according to multiple measurement signals that signal pickup assembly 130 gathers, and improves the accuracy of result.
According to another embodiment of the invention, the length of a plurality of bracing wire of laying can be different, and the most all bracing wires lay respectively in different cross-sectional periphery from the fixing end of leaflet inner faces, as shown in Figure 1.Now signal processing apparatus 140 can calculate the deformation quantity of blade difference section according to multiple measurement signals that signal pickup assembly 130 gathers, and characterizes the health degree of blade difference section respectively.
Further, signal processing apparatus 140 can also judge whether the deformation quantity of blade exceedes threshold value, the most then send alarm, notify staff's unit exception while instruction wind power plant is out of service.Here the systematic error that threshold value can cause according to inevitably swinging of occurring when with blade movement of the normal variation scope of the deformation quantity that blade occurs when properly functioning and bracing wire is arranged.
The principle calculating blade-shaped variable is specifically described below as a example by displacement transducer.
Signal X is measured in displacement transducer output, and signal pickup assembly 130 gathers this signal and transmits to signal processing apparatus 140, the wherein X i.e. displacement of end of pulling.Signal processing apparatus 140 is by mapping relations: Y=AX (wherein A is correction factor, and Y represents blade-shaped variable), transmission signal out is converted to the deformation quantity signal of blade, thus reaches the on-line monitoring to blade-shaped variable.
Further, as it is shown in figure 1, the bracing wire length laid differs, thus the deformation quantity of blade part segmentation can be realized.Such as, collect bracing wire D fixed position in Fig. 1 to blade-shaped variable data Yd between sensor fixed position, and bracing wire C fixed position is to blade-shaped variable data Yc between sensor fixed position.By Z=B (Ya-Yb), (wherein B is correction factor, Ya and Yb represents the deformation quantity of the blade that different sensors monitors respectively) mapping relations, signal processing apparatus 140 can be calculated on blade the deformation quantity Zc-d of part between bracing wire D fixed position and bracing wire C fixed position according to deformation quantity data Yd and Yc.
In addition, when with blade movement, the consideration of teeter is inevitably there is based on bracing wire, a further embodiment according to the present invention, system 100 can also include one or more fixing device 150, bracing wire can be fixed on leaflet inner faces by this fixing device 150, the bracing wire making layout is moved along fixing axial trajectory, avoid bracing wire that faint swing occurs when with blade movement, and be wound around between a plurality of bracing wire when laying a plurality of bracing wire, and it is easily installed the on-the-spot identification to different bracing wires.
Fig. 4 shows the structural representation of fixing device 150 according to an illustrative embodiment of the invention.Fixing device 150 can be fixed on leaflet inner faces with bonding agent or other reliable fixing means, and includes at least one through hole corresponding with at least one bracing wire position.Each bar bracing wire is each passed through the through hole of correspondence, moves along fixing axial trajectory.In addition, fixing device 150 can also include at least one fluting (with through hole similar) corresponding with at least one bracing wire position, it is also possible to playing the effect of fixing bracing wire tracks, the present invention is the most without limitation.
In sum, wind energy turbine set is generally located at the field that wind resource is abundant, and Service Environment is severe, and stand under load is complicated, and maintenance and the monitoring cost of parts are higher.And blade directly influences the normal operation of wind power plant as parts important in wind power plant, its reliability.The most great blower fan accident all originates from leaf destruction, will be avoided that have an accident if leaf destruction can carry out effective monitoring, and be significantly reduced loss.The deformation quantity that the present invention mainly occurs during vane stress by arranging bracing wire intuitively, effectively to detect, thus reach the purpose to blade health monitoring.Meanwhile, the system of the present invention is simple, stable, reliable, and it is convenient to install, and significantly reduces the strain on-line monitoring cost of blade.
In description mentioned herein, illustrate a large amount of detail.It is to be appreciated, however, that embodiments of the invention can be put into practice in the case of not having these details.In some instances, it is not shown specifically known method, structure and technology, in order to do not obscure the understanding of this description.
Similarly, it is to be understood that, one or more in order to simplify that the disclosure helping understands in each inventive aspect, above in the description of the exemplary embodiment of the present invention, each feature of the present invention is grouped together in single embodiment, figure or descriptions thereof sometimes.But, the method for the disclosure should not being construed to reflect an intention that, i.e. the present invention for required protection requires than the feature more features being expressly recited in each claim.More precisely, as the following claims reflect, inventive aspect is all features less than single embodiment disclosed above.Therefore, it then follows claims of detailed description of the invention are thus expressly incorporated in this detailed description of the invention, the most each claim itself is as the independent embodiment of the present invention.
Those skilled in the art are to be understood that the module of the equipment in example disclosed herein or unit or assembly can be arranged in equipment as depicted in this embodiment, or alternatively can be positioned in one or more equipment different from the equipment in this example.Module in aforementioned exemplary can be combined as a module or be segmented into multiple submodule in addition.
Those skilled in the art are appreciated that and can adaptively change the module in the equipment in embodiment and they are arranged in one or more equipment different from this embodiment.Module in embodiment or unit or assembly can be combined into a module or unit or assembly, and multiple submodule or subelement or sub-component can be put them in addition.In addition at least some in such feature and/or process or unit excludes each other, can use any combination that all features disclosed in this specification (including adjoint claim, summary and accompanying drawing) and so disclosed any method or all processes of equipment or unit are combined.Unless expressly stated otherwise, each feature disclosed in this specification (including adjoint claim, summary and accompanying drawing) can be replaced by the alternative features providing identical, equivalent or similar purpose.
In addition, those skilled in the art it will be appreciated that, although embodiments more described herein include some feature included in other embodiments rather than further feature, but the combination of the feature of different embodiment means to be within the scope of the present invention and formed different embodiments.Such as, in the following claims, one of arbitrarily can mode the using in any combination of embodiment required for protection.
Present invention additionally comprises: A5, system as described in A1, the spacing of wherein said every bracing wire is equal.A7, system as according to any one of A1-6, the length of the most each bar bracing wire is equal.
Additionally, some in described embodiment be described as at this can by the processor of computer system or by perform described function other device implement method or the combination of method element.Therefore, the processor with the necessary instruction for implementing described method or method element is formed for implementing the method or the device of method element.Additionally, the element described herein of device embodiment is the example of following device: this device is for implementing by the function performed by the element of the purpose in order to implement this invention.
As used in this, unless specifically stated so, use ordinal number " first ", " second ", " the 3rd " etc. to describe plain objects and be merely representative of the different instances relating to similar object, and be not intended to imply the object being so described must have the time upper, spatially, sequence aspect or in any other manner to definite sequence.
Although the embodiment according to limited quantity describes the present invention, but benefits from above description, those skilled in the art will appreciate that, in the scope of the present invention thus described, it can be envisaged that other embodiments.Additionally, it should be noted that the language used in this specification primarily to the readable and purpose of teaching and select rather than select to explain or limit subject of the present invention.Therefore, in the case of without departing from the scope of the appended claims and spirit, many modifications and changes will be apparent from for those skilled in the art.For the scope of the present invention, the disclosure being the present invention is illustrative and not restrictive, and it is intended that the scope of the present invention be defined by the claims appended hereto.
Claims (10)
1. monitor a system for the blade deformation of wind power plant, including at least one bracing wire, at least one measurement apparatus, signal pickup assembly and signal processing apparatus, wherein
Described at least one bracing wire is axially laid along leaflet inner faces, described leaflet inner faces nearly blade tip position is fixed in one end of every bracing wire, the other end is connected by flexible member with at least one measurement apparatus described, and described bracing wire drives described flexible member generation extensional motion with the deformation of blade；
At least one measurement apparatus described is both secured to the nearly hub positions of leaflet inner faces, is suitable to the extensional motion output according to its bracing wire connected drives flexible member to occur and measures signal；
Described signal pickup assembly is connected with at least one measurement apparatus described and described signal processing apparatus respectively, is suitable to gather and transmit at least one measurement signal of described at least one measurement apparatus output to described signal processing apparatus；
Described signal processing apparatus is suitable to calculate the deformation quantity of described blade according at least one measurement signal described.
2. the system as claimed in claim 1, wherein said signal processing apparatus is further adapted for judging whether the deformation quantity of described blade exceedes threshold value, the most then send alarm.
3. system as claimed in claim 1 or 2, also includes the one or more fixing devices being suitable to that bracing wire is fixed on leaflet inner faces.
4. system as claimed in claim 3, wherein said fixing device includes that at least one through hole corresponding with at least one bracing wire position or fluting, described at least one bracing wire are each passed through through hole or the fluting of correspondence.
5. the system as claimed in claim 1, wherein said quality of wire drawing is light, intensity is high and stroke is little.
6. the system as according to any one of claim 1-5, the length of the most each bar bracing wire is unequal.
7. system as claimed in claim 6, wherein said signal processing apparatus is suitable to calculate the deformation quantity of blade difference section according at least one measurement signal described.
8. the system as according to any one of claim 1-7, wherein said measurement apparatus is pulling force sensor, and bracing wire described in described measurement signal designation drives the pulling force that flexible member stretching produces.
9. the system as according to any one of claim 1-7, wherein said measurement apparatus is displacement transducer, and bracing wire described in described measurement signal designation drives the displacement that flexible member stretching produces.
10. system as claimed in claim 9, wherein said measurement apparatus is stay-supported type displacement sensor, and described bracing wire is the bracing wire of stay-supported type displacement sensor.
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| CN201610291233.0A CN105822508B (en) | 2016-04-29 | 2016-04-29 | A kind of system for the blade deformation for monitoring wind power plant |
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| CN201610291233.0A CN105822508B (en) | 2016-04-29 | 2016-04-29 | A kind of system for the blade deformation for monitoring wind power plant |
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| CN105822508B CN105822508B (en) | 2018-04-13 |
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| CN106500613A (en) * | 2016-10-17 | 2017-03-15 | 安徽容知日新科技股份有限公司 | A kind of apparatus and system of the blade deformation of monitoring wind power plant |
| CN108397407A (en) * | 2018-03-06 | 2018-08-14 | 傅小燕 | A kind of electric fan |
| CN108468650A (en) * | 2018-03-06 | 2018-08-31 | 傅小燕 | Improve the electric fan of security performance |
| CN115752283A (en) * | 2022-12-14 | 2023-03-07 | 盛东如东海上风力发电有限责任公司 | Blade deformation measuring method and device |
| CN117365866A (en) * | 2023-11-10 | 2024-01-09 | 内蒙古京能苏尼特风力发电有限公司 | Wind-powered electricity generation blade deformation monitoring system |
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| CN106500613A (en) * | 2016-10-17 | 2017-03-15 | 安徽容知日新科技股份有限公司 | A kind of apparatus and system of the blade deformation of monitoring wind power plant |
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