CN106837709A - Monitoring method and monitoring system for wind generating set blade - Google Patents
Monitoring method and monitoring system for wind generating set blade Download PDFInfo
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- CN106837709A CN106837709A CN201710264676.5A CN201710264676A CN106837709A CN 106837709 A CN106837709 A CN 106837709A CN 201710264676 A CN201710264676 A CN 201710264676A CN 106837709 A CN106837709 A CN 106837709A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000007405 data analysis Methods 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 29
- 238000000576 coating method Methods 0.000 claims description 29
- 230000009467 reduction Effects 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 230000005611 electricity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- F05B2260/80—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
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/334—Vibration measurements
-
- 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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- Wind Motors (AREA)
Abstract
A monitoring method and a monitoring system for a wind generating set blade comprise the following steps: acquiring a vibration signal of a blade of the wind generating set by using a sensor; extracting the vibration signal by a hub measurement unit provided in the hub; the hub measurement unit forwards the vibration signal to a data analysis unit arranged in a nacelle; and comparing the vibration signals of different blades in the wind generating set, and monitoring whether the blades are damaged or not. By adopting the embodiment of the invention, whether the blades in the wind generating set are damaged or not can be monitored in real time.
Description
Technical field
The present invention relates to technical field of wind power generation, more particularly to a kind of wind generator set blade monitoring method and prison
Examining system.
Background technology
Wind power generating set is typically made up of blade, wheel hub, pylon and cabin.Wind power generating set is by wind by blade
The mechanical energy of wheel hub can be converted to, mechanical energy drives generator amature to rotate again, the equipment of final output alternating current.
Blade is the part of stress maximum in wind power generating set.If subjected to damaging, it is also most expensive to change
One of part.Blade is the critical component of wind power generating set, blade in rotary course, when blade is gone to and lower section by top
When, stress changes and alternately change, and wind behaviour is unstable, and these can all cause the vibration of wind power generating set.
After wind power generating set works long hours, caused due to reasons such as material aging, the physics fatigue of hardware and adverse circumstances
Blade physical property declines and damages, and have impact on the operating efficiency of wind power generating set.Therefore, the running status of blade is monitored
Just it is particularly important.
At present, monitoring blade most common method is visually observation, and this method has time interval.In time interval
The small problem of period blade and early stage recoverable problem just probably have occurred and that and develop into serious problem.
To sum up, there is following technical problem in the prior art：Cannot real-time monitoring wind power generating set Leaf whether go out
Now damage.
The content of the invention
A kind of monitoring method of wind generator set blade is the embodiment of the invention provides, being capable of real-time monitoring wind-power electricity generation
Whether unit Leaf occurs damaging.
The embodiment of the present invention additionally provides a kind of monitoring system of wind generator set blade, being capable of real-time monitoring wind-force hair
Whether group of motors Leaf occurs damaging.
A kind of monitoring method of wind generator set blade, including：
Using the vibration signal of the blade of sensor collection wind power generating set；
The vibration signal is extracted by the wheel hub measuring unit being arranged in wheel hub；
The vibration signal is forwarded to the wheel hub measuring unit data analysis unit being arranged in cabin；
Compare the vibration signal of different leaves in the wind power generating set, monitor whether the blade occurs damaging
Wound.
Wherein, the wheel hub measuring unit is connected with the data analysis unit by wireless network；
Or,
The wheel hub measuring unit is connected with the data analysis unit by the cable in slip ring.
Wherein, in the comparing wind power generating set different leaves the vibration signal, monitoring the blade is
It is no to occur damaging, including：
The difference of the vibration signal of any two blade in the wind power generating set is determined, based on difference prison
Survey whether the blade occurs damaging.
Wherein, the difference of the vibration signal for determining any two blade in the wind power generating set, including：
Obtain vibration signal of any two blade in time domain in the wind power generating set；
Calculate difference of any two blade in the corresponding vibration signal amplitude of synchronization.
Wherein, the difference of the vibration signal for determining any two blade in the wind power generating set, including：
Obtain vibration signal of any two blade in time domain in the wind power generating set；
Correlation curve of any two blade described in the wind power generating set in the vibration signal of time domain is drawn, its
In, the correlation curve includes the difference of the vibration signal amplitude of any two blade.
Wherein, the wheel hub measuring unit vibration signal is forwarded to the data analysis unit that is arranged in cabin it
Afterwards, also include：
The gross mass of the wind power generating set Leaf is obtained based on the vibration signal；
According to the gross mass and the standard quality of the wind power generating set Leaf of the wind power generating set Leaf,
Monitor the ice coating state of the blade.
Wherein, the gross mass that the wind power generating set Leaf is obtained based on the vibration signal, including：
The vibration frequency of the wind power generating set Leaf is extracted according to the vibration signal；
The gross mass of the wind power generating set Leaf is calculated based on the vibration frequency.
Wherein, the gross mass according to the wind power generating set Leaf and the wind power generating set Leaf
Standard quality, monitors after the ice coating state of the blade, also includes：
Start blade according to the ice coating state of the blade to heat；
Or,
According to the power output of the ice coating state reduction wind power generating set of the blade.
A kind of monitoring system of wind generator set blade, including：
Sensor, the vibration signal of the blade for gathering wind power generating set；
Wheel hub measuring unit in wheel hub, for extracting and forwards the vibration signal；
Data analysis unit in cabin, for receiving the vibration signal；
Monitoring modular, the vibration signal for comparing different leaves in the wind power generating set monitors the leaf
Whether piece occurs damaging.
Wherein, the wheel hub measuring unit is connected with the data analysis unit by wireless network；
Or,
The wheel hub measuring unit is connected with the data analysis unit by the cable in slip ring.
Wherein, the monitoring modular, is further used for determining the described of any two blade in the wind power generating set
The difference of vibration signal, monitors whether the blade occurs damaging based on the difference.
Wherein, the monitoring modular is further used for：
Obtain vibration signal of any two blade in time domain in the wind power generating set；
Calculate difference of any two blade in the corresponding vibration signal amplitude of synchronization.
Wherein, the monitoring modular is further used for：
Obtain vibration signal of any two blade in time domain in the wind power generating set；
Correlation curve of any two blade described in the wind power generating set in the vibration signal of time domain is drawn, its
In, the correlation curve includes the difference of the vibration signal amplitude of any two blade.
Wherein, the monitoring modular, is further used for obtaining the wind power generating set middle period based on the vibration signal
The gross mass of piece；
According to the gross mass and the standard quality of the wind power generating set Leaf of the wind power generating set Leaf,
Monitor the ice coating state of the blade.
Wherein, the monitoring system also includes control module, and starting blade for the ice coating state according to the blade adds
Heat；
Or,
According to the power output of the ice coating state reduction wind power generating set of the blade.
Wherein, the sensor is located at the blade largest chord strong point in the blade interior leading edge direction.
As can be seen that the vibration signal of the blade using sensor collection wind power generating set from above-mentioned technical proposal；
The vibration signal is extracted by the wheel hub measuring unit being arranged in wheel hub；Be forwarded to for vibration signal and set by wheel hub measuring unit
Put the data analysis unit in cabin；Compare the vibration signal of different leaves in wind power generating set, whether monitoring blade goes out
Now damage.Due to can in real time obtain the vibration signal of wind power generating set Leaf, therefore, it is possible to real-time monitoring wind-power electricity generation
Whether unit Leaf occurs damaging.
Brief description of the drawings
From below in conjunction with the accompanying drawings to be may be better understood in the description of specific embodiment of the invention the present invention wherein,
Same or analogous reference represents same or analogous feature.
Fig. 1 is the monitoring method schematic flow sheet of wind generator set blade in the embodiment of the present invention；
Fig. 2 is the schematic flow sheet of monitoring blade icing in the embodiment of the present invention；
Fig. 3 is the structural representation of the monitoring system of wind generator set blade in the embodiment of the present invention；
Fig. 4 is the structural representation of another monitoring system of wind generator set blade in the embodiment of the present invention；
Fig. 5 is wind power generating set blade sensor schematic view of the mounting position in the embodiment of the present invention；
Fig. 6 is the use structural representation of the monitoring system of wind generator set blade in the embodiment of the present invention；
Fig. 7 is the vibration signal frequency domain figure of embodiment of the present invention Leaf；
Fig. 8 is the vibration signal time-domain diagram of embodiment of the present invention Leaf damage process；
In the accompanying drawings, identical part uses identical reference, and description of symbols is as follows：
301- sensors；Wheel hub measuring unit -302；Data analysis unit -303；Monitoring modular -304；Control module
305。
Specific embodiment
Must be become more apparent to express the object, technical solutions and advantages of the present invention, below in conjunction with the accompanying drawings and specifically
The present invention is further described in more detail for embodiment.
In embodiments of the present invention, the vibration signal of the blade of wind power generating set is gathered using sensor, by comparing
The vibration signal of different leaves in wind power generating set, can monitor whether blade occurs damaging.Furthermore it is also possible to be based on blade
Vibration signal obtain blade gross mass, and then monitor blade ice coating state.
It is the monitoring method schematic flow sheet of wind generator set blade in the embodiment of the present invention referring to Fig. 1, specifically includes：
S101, using sensor collection wind power generating set blade vibration signal.
S102, the wheel hub measuring unit extraction vibration signal by being arranged in wheel hub.
The vibration signal is forwarded to the data analysis unit being arranged in cabin for S103, wheel hub measuring unit.
Whether S104, the vibration signal for comparing different leaves in wind power generating set, monitoring blade occur damaging.
In embodiments of the present invention, the vibration signal of wind power generating set Leaf is gathered first.Then, by being arranged on
Wheel hub measuring unit in wheel hub extracts the vibration signal of blade, and the vibration signal of blade is forwarded to setting by wheel hub measuring unit
Data analysis unit in cabin.Finally, the vibration signal of different leaves in wind power generating set is compared, whether is monitoring blade
Occur damaging.Because the corresponding vibration signal of blade for occurring damaging can change, therefore can believe according to the vibration of blade
Number monitoring blade whether occur damage.The vibration signal of wind power generating set Leaf can be real-time acquisition, therefore, it is possible to
The state of real-time monitoring wind power generating set Leaf.
In an alternate embodiment of the invention, it is possible to use sensor gathers the vibration signal of wind power generating set Leaf.Sensing
The position of device can flexibly be set, for example, be arranged on blade inlet edge, and blade interior can be with.
Collect after the vibration signal of wind power generating set Leaf, it is necessary to the vibration signal of blade is sent into wheel hub
Wheel hub measuring unit (HMU, Hub Measurement Unit).For example, the vibration of blade can be believed by signal cable
Number send to HMU.In order to protection signal cable in blade from mechanical tension, signal cable can be with sine wave in blade
Mode cabling.
In an alternate embodiment of the invention, HMU is located in wheel hub, data analysis unit (ECU, Evaluation and
Communication Unit) it is located in cabin.Can be connected to transmit blade in several ways between HMU and ECU
Vibration signal.A kind of mode is：Be connected by wireless network between HMU and ECU, wireless network can be WLAN,
Bluetooth connection or other radio connections.Another way is：HMU is connected with ECU by the cable in slip ring.
HMU is provided with slip ring between ECU, and slip ring is provided with reserved hole position and wire casing.Cable between HMU and ECU can be by reserved
Hole position and wire casing are connected with HMU and ECU respectively.
In an alternate embodiment of the invention, determine the difference of the vibration signal of any two blade in wind power generating set, be based on
The difference of the vibration signal of any two blade monitors whether corresponding blade occurs damaging.Wind power generating set Leaf is
Identical, in the case where blade does not sustain damage, the vibration signal of each blade is essentially identical.And be subject in blade
In the case of damage, the vibration signal of blade changes.Specifically, the vibration signal of any two blade can be based on
Difference monitors whether corresponding blade occurs damaging.
In an alternate embodiment of the invention, vibration signal of any two blade in time domain in wind power generating set can be obtained.
Also just say, any two blade can thus be calculated and appointed in the vibration signal of different time points in obtaining wind-force Wind turbines
Difference of two blades of meaning in the corresponding vibration signal amplitude of synchronization.At identical moment, the vibration of any two blade
The difference of signal amplitude, i.e. each blade have vibration amplitude at the identical moment, according to different leaves in synchronization correspondence
Vibration amplitude difference monitoring blade whether occur damage.
In an alternate embodiment of the invention, vibration signal of any two blade in time domain first in acquisition wind power generating set.
Then, correlation curve of any two blade in the vibration signal of time domain in drafting wind power generating set.In a coordinate system, transverse axis
The time is represented, the longitudinal axis represents the difference of vibration signal amplitude.That is, correlation curve includes that the vibration of any two blade is believed
The difference of number amplitude.The change of the difference of the vibration signal amplitude of any two blade can be intuitively known according to correlation curve.
Specifically, two correlation curves of the vibration signal of different leaves in wind power generating set can be obtained.For example,
The correlation curve 1 of the vibration signal of blade 1 and the vibration signal of blade 2 is obtained, the vibration signal and blade 3 of blade 1 is obtained
The correlation curve 2 of vibration signal, obtains the correlation curve 3 of the vibration signal of blade 2 and the vibration signal of blade 3.
Compare correlation curve 1, correlation curve 2 and correlation curve 3, because blade 1, blade 2 and blade 3 are same sizes
Blade, when blade damage does not occur, correlation curve 1, correlation curve 2 and correlation curve 3 are almost without difference.Work as blade
There is microlesion, then correlation curve 1, correlation curve 2 and correlation curve 3 have and change.For example, correlation curve 1 is not sent out
Changing；Correlation curve 2 changes；Correlation curve 3 changes, and now judges that damaging occurs in blade 3.
In an alternate embodiment of the invention, it is the schematic flow sheet of monitoring blade icing in the embodiment of the present invention referring to Fig. 2, specifically
Including：
S201, the vibration signal based on blade obtain the gross mass of wind power generating set Leaf.
Vibration frequency is extracted from the vibration signal of blade, vibration frequency is the current vibration frequency of blade.In view of leaf
The vibration frequency of piece has relation with the gross mass of blade.That is the gross mass of blade is bigger, then the vibration frequency of blade is smaller.Its
In, the gross mass of blade is the load sum of the standard quality with blade of blade.When larger damage occurs in blade, for example due to
Blade long-play or thunderbolt cause tip segment defect, the Mass lost of blade, then the load of blade is negative；Work as leaf
There is icing in piece surface, then the load of blade is positive number.
Specifically, in this step, the vibration frequency f of blade is extracted according to vibration signal first；Again based on vibration frequency
Rate f calculates the gross mass of wind power generating set Leaf.
The relation of the vibration frequency of blade and the gross mass of blade is represented by expression formula (1)：
Wherein, m is the gross mass of wind-driven generator unit Leaf, and k is blade stiffness by itself, and f is that blade is overall to shake
Dynamic frequency.Blade stiffness by itself is determined by factors such as planform, cross sectional shape and support positions.
The standard quality of S202, the gross mass according to wind power generating set Leaf and wind power generating set Leaf, prison
Survey the ice coating state of blade.
Wherein, the standard quality of blade is quality of the blade when dispatching from the factory.The gross mass of wind power generating set Leaf and
The difference of the standard quality of wind power generating set Leaf is negative, it is determined that blade is possible to be occurred damaging.Damage herein is
Refer to because the impaired damage for causing the quality of blade to reduce.
The difference of the gross mass of wind power generating set Leaf and the standard quality of wind power generating set Leaf is positive number, then
Determine that blade is possible to icing occur.
Zero degree is less than in the temperature residing for wind turbine power generation unit, and air humidity is larger or the situation of sleet, leaf occurs
Piece occurs icing.The gross mass of wind power generating set Leaf gradually increases after blade surface icing.In order to avoid blade table
The influence of face icing, can also reduce the influence to blade according to the ice coating state of blade using different means.
Can be weighed with the difference of the gross mass of wind power generating set Leaf and the standard quality of wind power generating set Leaf
Measure the ice coating state of blade.
For example, the difference of the standard quality of the gross mass of wind power generating set Leaf and wind power generating set Leaf is less than
Preset first threshold value, ice coating state is slight.
The difference of the gross mass of wind power generating set Leaf and the standard quality of wind power generating set Leaf is more than or equal to
Preset first threshold value and less than Second Threshold, ice coating state is moderate.
The difference of the gross mass of wind power generating set Leaf and the standard quality of wind power generating set Leaf is more than or equal to
Default Second Threshold, ice coating state is severe.
When ice coating state is slight, start blade heating.
When ice coating state is moderate, power at power output to original wind-power electricity generation of wind power generating set is reduced
50%.
When ice coating state is severe, the power output of wind power generating set is reduced to 0, that is, shut down.
In the embodiment of the present invention, the gross mass of wind power generating set Leaf can be obtained by vibration signal.Then, according to
The gross mass of wind power generating set Leaf and the standard quality of wind power generating set Leaf, monitor the ice coating state of blade.
Blade can be adjusted in different ways when being in ice coating state, to avoid blade from being damaged.
It is the monitoring system structural representation of wind generator set blade in the embodiment of the present invention referring to accompanying drawing 3, specific bag
Include：Sensor 301, HMU302, ECU 303 and monitoring modular 304.
Sensor 301, the vibration signal of the blade for gathering wind power generating set.
HMU302, for extracting and forwards the vibration signal of blade.
ECU303, the vibration signal for receiving blade.
Whether monitoring modular 304, the vibration signal for comparing different leaves in wind power generating set, monitoring blade occurs
Damage.
In embodiments of the present invention, sensor 301 gathers the vibration signal of wind power generating set Leaf first.Then,
HMU302 is extracted and is forwarded the vibration signal of blade, and ECU303 receives the vibration signal of blade.Finally, monitoring modular 304 compares
Whether the vibration signal of different leaves in wind power generating set, monitoring blade occurs damaging.Due to the blade correspondence for occurring damaging
Vibration signal can change, therefore can according to blade vibration signal monitoring blade whether occur damage.Wind-power electricity generation
The vibration signal of unit Leaf can be real-time acquisition, therefore, it is possible to the shape of real-time monitoring wind power generating set Leaf
State.
Collect after the vibration signal of the blade in wind power generating set, it is necessary to the vibration signal of blade is sent to wheel hub
In HMU302.The vibration signal of blade can be sent to HMU302 by signal cable.In order to protection signal cable is in leaf
From mechanical tension in piece, signal cable can be with sinus wave patters cabling in blade.
In an alternate embodiment of the invention, HMU302 is located in wheel hub, and ECU303 is located in cabin.Between HMU302 and ECU303
Can be connected to transmit the vibration signal of blade in several ways.A kind of mode is：Pass through between HMU302 and ECU303
Wireless network is connected, and wireless network can be WLAN, bluetooth connection or other radio connections.Another kind side
Formula is：HMU302 is connected with ECU303 by the cable in slip ring.Slip ring is provided between HMU302 and ECU303, on slip ring
It is provided with reserved hole position and wire casing.Cable between HMU302 and ECU303 can by reserved hole position and wire casing respectively with HMU and
ECU is connected.
In an alternate embodiment of the invention, monitoring modular 304 is further used for determining any two blade in wind power generating set
Vibration signal difference, the difference of the vibration signal based on any two blade monitors whether corresponding blade occurs damaging.
Wind power generating set Leaf is identical, and in the case where blade does not sustain damage, the vibration signal of each blade is
Identical.And in the case where blade sustains damage, the vibration signal of blade changes.Specifically, can be based on any
Two differences of the vibration signal of blade monitor whether corresponding blade occurs damaging.
In an alternate embodiment of the invention, monitoring modular 304 is further used for that any two in wind power generating set can be obtained
Vibration signal of the blade in time domain.Also just say, vibration of any two blade in different time points in acquisition wind-force Wind turbines
Signal, can thus calculate difference of any two blade in the corresponding vibration signal amplitude of synchronization.In identical
Carve, calculate the difference of the vibration signal amplitude of any two blade, be i.e. each blade has vibration amplitude at the identical moment, supervise
Survey whether difference monitoring blade of the module 304 according to different leaves in the corresponding vibration amplitude of synchronization occurs damaging.
In an alternate embodiment of the invention, monitoring modular 304 further obtain wind power generating set in any two blade when
The vibration signal in domain.Then, correlation curve of any two blade in the vibration signal of time domain in drafting wind power generating set.
In coordinate system, transverse axis represents the time, and the longitudinal axis represents the difference of vibration signal amplitude.That is, correlation curve includes any two
The difference of the vibration signal amplitude of individual blade.The vibration signal amplitude of any two blade can be intuitively known according to correlation curve
Difference change.
Specifically, monitoring modular 304 can obtain in wind power generating set the right of two vibration signals of different leaves
Compare curve.For example, obtaining the correlation curve 1 of the vibration signal of blade 1 and the vibration signal of blade 2, the vibration letter of blade 1 is obtained
Correlation curve 2 number with the vibration signal of blade 3, obtains the correlation curve of the vibration signal of blade 2 and the vibration signal of blade 3
3.Monitoring modular 304 compares correlation curve 1, correlation curve 2 and correlation curve 3, and whether monitoring blade occurs damaging.
In an alternate embodiment of the invention, monitoring modular 304 is further used for the vibration signal acquisition wind-power electricity generation based on blade
The gross mass of unit Leaf.According to the gross mass and the standard matter of wind power generating set Leaf of wind power generating set Leaf
Amount, monitors the ice coating state of blade.
In an alternate embodiment of the invention, it is another monitoring of wind generator set blade in the embodiment of the present invention referring to Fig. 4
The structural representation of system, including sensor 301, HMU302, ECU303, monitoring modular 304 and control module 305.That is, Fig. 4
In system be on the basis of Fig. 3 systems increase control module 305.
Control module 305 is used to start blade heating according to the ice coating state of blade.Control module 305 can be also used for according to
According to the power output of the ice coating state reduction wind power generating set of blade.
In an alternate embodiment of the invention, sensor 301 may be located at the optional position of blade interior.In view of the vibration of blade
Amplitude, the vibration signal of the more big easier collection blade of Oscillation Amplitude of blade.It is wind-force in the embodiment of the present invention referring to accompanying drawing 5
The monitoring system of generating set blade uses structural representation, sensor 301 to can be located at wind generator set blade edge.
In addition, in order to avoid the vibration signal of portion is lacked, whole positions from blade root to blade tip can be collected
Vibration signal, sensor 301 may be located at the blade largest chord strong point in blade interior leading edge direction, to gather wind power generating set
The vibration signal of Leaf.Technical scheme is described in detail with reference to concrete condition.There is wind power generating set in Fig. 6
Three blades, the edge of each blade interior is provided with vibrating sensor.HMU is installed, HMU passes through signal cable in wheel hub
Collect the data that vibrating sensor is gathered.
HMU and ECU is carried out data transmission by way of wireless WIFI.In view of not having on the slip ring between HMU and ECU
Hole position and wire casing are reserved enough, for having been enter into the wind power generating set of O＆M wind field, are changed and are redesigned with preformed hole
Slip ring do not allowed from cost, therefore use wirelessly transmitting data.Certainly in the case where cost is not considered, it is also possible to
Cable is set in the slip ring for redesigning, HMU and ECU is connected with the cable.
ECU is connected to Wind turbines bottom of towe control cabinet interchanger by optical fiber, then is connected to wind-powered electricity generation by wind power plant looped network
Field server.Wind farm server data storage and analyze data, the real time data of result and monitoring after analysis can be by public affairs
Net is shown to WEB terminals.
Wind farm server compares the vibration signal of different leaves in wind power generating set, and whether monitoring blade occurs damaging
Wound.The gross mass that vibration signal obtains wind power generating set Leaf is also based on, according to wind power generating set Leaf
Gross mass and wind power generating set Leaf standard quality, monitor blade ice coating state.
In a particular application, monitoring modular 304 can be arranged in ECU303 or engine room inside, carry out the place of vibration signal
Reason.In the system shown in Fig. 6, monitoring modular 304 can be arranged on wind farm server.
Specifically, being the vibration signal frequency domain figure of embodiment of the present invention Leaf referring to Fig. 7, transverse axis represents blade vibration letter
Number frequency, the longitudinal axis represents the amplitude of blade.Wherein every curve one blade of correspondence, it can be seen that each blade at each
Amplitude at frequency location is more or less the same.
Fig. 8 is the vibration signal time-domain diagram of embodiment of the present invention Leaf damage process, and transverse axis represents the time, and the longitudinal axis is indirect
Represent two differences of blade vibration amplitude.Wherein, 1 part represents blade 1 and the Oscillation Amplitude of blade 2 is poor；2 parts represent leaf
Piece 2 is poor with the Oscillation Amplitude of blade 3；It is poor with the Oscillation Amplitude of blade 1 that 3 parts represent blade 3.
Blade does not sustain damage, then the Oscillation Amplitude of each blade is very nearly the same.When the Oscillation Amplitude of blade is differed very
It is many, it is likely that blade breaks down.In Fig. 8 as can be seen that 1 part is larger with the amplitude of variation of 2 parts, 3 parts change width
Degree is smaller, then illustrate that blade 1 is poor with the Oscillation Amplitude of blade 2 larger, and blade 2 is poor with the Oscillation Amplitude of blade 3 larger, blade 3
With the poor very little of the Oscillation Amplitude of blade 1.May determine that blade 1 and blade 3 do not sustain damage, blade 2 may sustain damage.
After reblading 2 is damaged, it can be seen that the equal very little of amplitude of variation of 1 part, 2 parts and 3 parts, then on-bladed is damaged.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of correspondence technical scheme is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (16)
1. a kind of monitoring method of wind generator set blade, it is characterised in that including：
Using the vibration signal of the blade of sensor collection wind power generating set；
The vibration signal is extracted by the wheel hub measuring unit being arranged in wheel hub；
The vibration signal is forwarded to the wheel hub measuring unit data analysis unit being arranged in cabin；
Compare the vibration signal of different leaves in the wind power generating set, monitor whether the blade occurs damaging.
2. the monitoring method of wind generator set blade according to claim 1, it is characterised in that the wheel hub measuring unit
It is connected by wireless network with the data analysis unit；
Or,
The wheel hub measuring unit is connected with the data analysis unit by the cable in slip ring.
3. the monitoring method of wind generator set blade according to claim 1, it is characterised in that the comparing wind-force
The vibration signal of different leaves in generating set, monitors whether the blade occurs damaging, including：
Determine the difference of the vibration signal of any two blade in the wind power generating set, institute is monitored based on the difference
State whether blade occurs damaging.
4. the monitoring method of wind generator set blade according to claim 3, it is characterised in that the determination wind-force
The difference of the vibration signal of any two blade in generating set, including：
Obtain vibration signal of any two blade in time domain in the wind power generating set；
Calculate difference of any two blade in the corresponding vibration signal amplitude of synchronization.
5. the monitoring method of wind generator set blade according to claim 3, it is characterised in that the determination wind-force
The difference of the vibration signal of any two blade in generating set, including：
Obtain vibration signal of any two blade in time domain in the wind power generating set；
Correlation curve of any two blade described in the wind power generating set in the vibration signal of time domain is drawn, wherein, institute
State the difference of vibration signal amplitude of the correlation curve including any two blade.
6. the monitoring method of wind generator set blade according to claim 1, it is characterised in that the wheel hub measuring unit
The vibration signal is forwarded to after the data analysis unit being arranged in cabin, is also included：
The gross mass of the wind power generating set Leaf is obtained based on the vibration signal；
According to the gross mass and the standard quality of the wind power generating set Leaf of the wind power generating set Leaf, monitoring
The ice coating state of the blade.
7. the monitoring method of wind generator set blade according to claim 6, it is characterised in that described based on the vibration
Signal obtains the gross mass of the wind power generating set Leaf, including：
The vibration frequency of the wind power generating set Leaf is extracted according to the vibration signal；
The gross mass of the wind power generating set Leaf is calculated based on the vibration frequency.
8. the monitoring method of wind generator set blade according to claim 6, it is characterised in that described according to the wind-force
The standard quality of the gross mass of generating set Leaf and the wind power generating set Leaf, monitors the icing shape of the blade
After state, also include：
Start blade according to the ice coating state of the blade to heat；
Or,
According to the power output of the ice coating state reduction wind power generating set of the blade.
9. a kind of monitoring system of wind generator set blade, it is characterised in that including：
Sensor, the vibration signal of the blade for gathering wind power generating set；
Wheel hub measuring unit in wheel hub, for extracting and forwards the vibration signal；
Data analysis unit in cabin, for receiving the vibration signal；
Monitoring modular, the vibration signal for comparing different leaves in the wind power generating set, monitoring the blade is
It is no to occur damaging.
10. the monitoring system of wind generator set blade according to claim 9, it is characterised in that the wheel hub measurement is single
It is first to be connected by wireless network with the data analysis unit；
Or,
The wheel hub measuring unit is connected with the data analysis unit by the cable in slip ring.
The monitoring system of 11. wind generator set blades according to claim 9, it is characterised in that the monitoring modular, enters
One step is used for the difference of the vibration signal for determining any two blade in the wind power generating set, based on difference prison
Survey whether the blade occurs damaging.
12. according to claim 11 wind generator set blade monitoring system, it is characterised in that the monitoring modular enters
One step is used for：
Obtain vibration signal of any two blade in time domain in the wind power generating set；
Calculate difference of any two blade in the corresponding vibration signal amplitude of synchronization.
13. according to claim 11 wind generator set blade monitoring system, it is characterised in that the monitoring modular enters
One step is used for：
Obtain vibration signal of any two blade in time domain in the wind power generating set；
Correlation curve of any two blade described in the wind power generating set in the vibration signal of time domain is drawn, wherein, institute
State the difference of vibration signal amplitude of the correlation curve including any two blade.
The monitoring system of 14. wind generator set blades according to claim 9, it is characterised in that the monitoring modular, enters
One step is used to be obtained based on the vibration signal gross mass of the wind power generating set Leaf；
According to the gross mass and the standard quality of the wind power generating set Leaf of the wind power generating set Leaf, monitoring
The ice coating state of the blade.
15. according to claim 14 wind generator set blade monitoring system, it is characterised in that the monitoring system is also
Including control module, start blade for the ice coating state according to the blade and heat；
Or,
According to the power output of the ice coating state reduction wind power generating set of the blade.
16. according to any one of claim 9-15 wind generator set blade monitoring system, it is characterised in that it is described
Sensor is located at the blade largest chord strong point in the blade interior leading edge direction.
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| CN107829885A (en) * | 2017-10-25 | 2018-03-23 | 西安锐益达风电技术有限公司 | A kind of blade of wind-driven generator vibration monitoring and system for considering ambient parameter amendment |
| CN108087210A (en) * | 2017-12-19 | 2018-05-29 | 北京金风科创风电设备有限公司 | Wind generating set blade abnormity identification method and device |
| CN109973332A (en) * | 2017-12-27 | 2019-07-05 | 浙江中自庆安新能源技术有限公司 | Blade of wind-driven generator icing on-line monitoring method and device |
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| CN112983750A (en) * | 2019-12-13 | 2021-06-18 | 中车株洲电力机车研究所有限公司 | Method and device for diagnosing mounting dislocation of blades of wind turbine generator |
| CN113915080A (en) * | 2021-11-15 | 2022-01-11 | 四川建筑职业技术学院 | Blade icing operation detection and control method for wind generating set |
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Application publication date: 20170613 |