CN105784093B - Fan vibration pre-warning and control method and device - Google Patents
Fan vibration pre-warning and control method and device Download PDFInfo
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- CN105784093B CN105784093B CN201610130898.3A CN201610130898A CN105784093B CN 105784093 B CN105784093 B CN 105784093B CN 201610130898 A CN201610130898 A CN 201610130898A CN 105784093 B CN105784093 B CN 105784093B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/04—Measuring characteristics of vibrations in solids by using direct conduction to the detector of vibrations which are transverse to direction of propagation
- G01H1/06—Frequency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/04—Measuring characteristics of vibrations in solids by using direct conduction to the detector of vibrations which are transverse to direction of propagation
- G01H1/08—Amplitude
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Abstract
The present invention provides a kind of fan vibration pre-warning and control method and devices.Whether the fan vibration pre-warning and control method includes: the real-time vibration data for obtaining Wind turbines under composed of external damping, and identify the vibration data using the first natural frequency of Wind turbines as dominant frequency；If the vibration amplitude of the vibration data is greater than preset secure threshold, and the vibration data then postpones to issue this vibration early warning using the first natural frequency as dominant frequency.It using the embodiment of the present invention, can faster reduce the oscillating load of Wind turbines, while improve the working efficiency of Wind turbines.
Description
Technical field
The present invention relates to technical field of wind power generation, in particular to a kind of fan vibration pre-warning and control method and device.
Background technique
In the operational process of wind power generating set (referred to as " Wind turbines "), Wind turbines tower can be in the work of strong gusts of wind
It is vibrated with lower generation, influences the normal operation of Wind turbines.Wherein, tower can generate the biggish tower one of amplitude coming wind direction
Rank natural frequency vibration, the amplitude of the vibration can generally exceed vibration protection threshold value set in Wind turbines master control system,
Seriously affect the normal operation of Wind turbines.
When master control system detects the vibration of tower first natural frequency, the vibration decaying side of damping can be added by tower
Formula is vibrated to reduce tower first natural frequency, and then realizes the vibration protection to Wind turbines.Exceed in the amplitude of the vibration
When vibration protection threshold value, master control system will do it vibration early warning and control fan parking, to prevent Wind turbines from vibration event occur
Barrier.
But this tower adds the vibration halt protection method of damping that there are a distinct disadvantages.In powerful formation wind action
Under, Wind turbines are experienced with tower first natural frequency be leading vibration the first two vibration peak, and it is only pneumatic
The peak value of vibration under damping action is smaller compared to amplitude variation, i.e., Wind turbines have the attenuation of the first two vibration amplitude
Limit, and after Wind turbines are shut down, tower adds damping function that can close, and the amplitude attenuation for vibrating tower first natural frequency is slow
Slowly, Wind turbines overall load is larger, and then influences the service life of Wind turbines.
Summary of the invention
The embodiment of the present invention provides a kind of fan vibration pre-warning and control method and device, that is, can avoid unnecessary vibration
It shuts down, the working efficiency for improving Wind turbines can faster reduce the overall load of Wind turbines again, extend the use of Wind turbines
Service life.
In order to achieve the above objectives, the embodiment provides a kind of fan vibration pre-warning and control methods, comprising: in real time
Vibration data of the Wind turbines under composed of external damping is obtained, and identifies whether the vibration data is intrinsic with the single order of Wind turbines
Frequency is dominant frequency；If the vibration amplitude of the vibration data be greater than preset secure threshold, and the vibration data with
The first natural frequency is dominant frequency, then postpones to issue this vibration early warning.
According to another aspect of the present invention, the embodiment of the present invention also provides a kind of fan vibration prewarning controller, packet
It includes: obtaining identification module, for obtaining vibration data of the Wind turbines under composed of external damping in real time, and identify the vibration data
Whether using the first natural frequency of Wind turbines as dominant frequency；Compare Postponement module, if the vibration for the vibration data
Dynamic amplitude is greater than preset secure threshold, and the vibration data then postpones to send out using the first natural frequency as dominant frequency
This vibration early warning out.
Fan vibration pre-warning and control method and device provided in an embodiment of the present invention, for Wind turbines composed of external damping
Whether Wind turbines can be using first natural frequency as dominant frequency according to current vibration data before each sending vibration early warning
The case where, come indirectly judge current vibration data whether be rapid decay vibration data；When the vibration width of vibration data
After preset secure threshold, first judge current vibration data whether using the first natural frequency of Wind turbines as dominant pilot
Rate, if so, delay issues this vibration early warning, to more quickly realize vibration with directly vibrating compared with shutdown operation
Dynamic decaying, to reduce the damage that Wind turbines occur in vibration, improves the working efficiency of Wind turbines.
Detailed description of the invention
Fig. 1 is the operation data figure before and after Wind turbines provided by the invention generation vibration fault；
Fig. 2 a is that the acceleration simulation figure for coming wind direction after vibration fault occurs for Wind turbines provided by the invention；
Fig. 2 b is the acceleration for the vertical direction for coming wind direction that Wind turbines provided by the invention occur after vibration fault
Analogous diagram；
Fig. 3 is a flow chart of fan vibration pre-warning and control method provided by the invention；
Fig. 4 is another flow chart of fan vibration pre-warning and control method provided by the invention；
Fig. 5 is a structural block diagram of fan vibration prewarning controller provided by the invention；
Fig. 6 is another structural block diagram of fan vibration prewarning controller provided by the invention.
Specific embodiment
The basic conception of this programme is, for using the intrinsic frequency of Wind turbines as the wind generating set vibration number of dominant frequency
When carrying out early warning control according to (vibration data as caused by strong gusts of wind), added under the working condition of vibration damping outside Wind turbines
It is contemplated that delay issues vibration early warning.Principle is: Wind turbines apply applied vibration damping (such as: increase additional variable pitch
Movement, generator torque etc.) in the case of, using the vibration data that first natural frequency is carried out as dominant frequency, just with Wind turbines
When vibration data (there was only vibration data when air damping) under often vibration is shut down compares, the former has more quickly compared with the latter
Vibration attenuation trend.Therefore, vibration event is not issued temporarily in the early period that vibration starts beyond protection threshold value using the feature
Hinder early warning (shutting down early warning as long as issuing, composed of external damping function will be closed), continues with composed of external damping to Wind turbines with one
The vibration amplitude of rank intrinsic frequency is inhibited, to realize rapid decay first natural frequency, and then is reduced Wind turbines and is carried
The purpose of lotus.
For example, as shown in Figure 1, being the Wind turbines of applied vibration damping using its first natural frequency as dominant frequency
Operation data figure before and after vibration fault occurs.It is that front and back megawatt unit fortune occurs for certain vibration fault shown in Fig. 1
Row data, wherein " vibration fault before and after " refer mainly to Wind turbines that vibration data is concentrated on break down vibrate when before
Latter 30 seconds when occurring to fault vibration within 90 seconds.Vibration data specifically includes that the vibration data for coming wind direction and vertical with wind is carried out
The vibration data in direction.This programme gives air speed data corresponding with both vibration data moment simultaneously.
In Fig. 1, about 10m/s is risen within the very short time carrying out wind direction wind speed, Wind turbines is made to shake
Dynamic failure.Inventor carries out vibration shutdown to the vibration data under above-mentioned practical wind environment and composed of external damping continues two kinds of power generation
Vibration data under state is simulated, and is extracted after moment (90 seconds corresponding moment in corresponding diagram 1) occurs for vibration fault
Vibration data compare.Both vibration datas realize vibration with the first natural frequency of Wind turbines.Such as Fig. 2 a, figure
It is the Lai Fengfang after applying step wind speed (simulation Wind turbines are under strong gusts of wind with its single order natural frequency vibration) shown in 2b
To the vibration data (such as vibration acceleration at the top of Wind turbines tower) with the vertical direction for coming wind direction.Fig. 2 a, Fig. 2 b
In clearly show: either wind direction is still in the vertical direction in wind direction, and in composed of external damping, (Wind turbines are after supervention
Electricity) vibration data compared with vibration shut down vibration data more quick attenuation trend is all presented.
It follows that when vibration fault occurs for Wind turbines being not necessarily intended to that vibration halt mode is taken to avoid immediately
Unit again by load injury, if current fault vibration be composed of external damping and with the first natural frequency of Wind turbines into
Row vibration, or vibrated by dominant frequency of first natural frequency, even when shutting down without vibration, Wind turbines also can
It completes to vibrate with the rapid decay of the first natural frequency of itself whithin a period of time, so that more quick drop is shut down in relatively vibration
The oscillating load of low Wind turbines guarantees the safety of Wind turbines.Here illustrate, continue generating state in practical Wind turbines
Under, in the rapid decay vibration processes by the first natural frequency of itself, the amplitude of vibration data should be avoided by external environment
Factor is interfered and is significantly more than preset secure threshold, or crosses for a long time beyond secure threshold.
The fan vibration pre-warning and control method and device of the embodiment of the present invention are described in detail with reference to the accompanying drawing.
Embodiment one
Fig. 3 is the flow chart of fan vibration pre-warning and control method provided by the invention, and the executing subject of the control method can
Think the integrated control device for controlling running of wind generating set state, for example, Wind turbines master control system or be integrated in master
Control function module in control system.As shown in figure 3, the fan vibration pre-warning and control method includes:
Whether S310 obtains vibration data of the Wind turbines under composed of external damping in real time, and identifies vibration data with wind-powered electricity generation
The first natural frequency of unit is dominant frequency.
In the operational process of existing wind power generating set, strong gusts of wind would generally cause Wind turbines appearance significantly to be shaken
It is dynamic.Existing vibration maintenance strategy mainly judges the oscillating load that Wind turbines are currently born according to the amplitude of vibration,
And vibration is taken to shut down when vibration amplitude exceeds secure threshold, while applying additional damping when Wind turbines operate normally and supporting
Oscillating load that is imperial and reducing strong gusts of wind generation, makes Wind turbines continuous service.This programme be on the basis of existing technology, it is right
Vibration shuts down and optimizes early warning.
Firstly, obtaining vibration data of the Wind turbines under composed of external damping in real time during running of wind generating set, such as may be used
By the way that in each load key position of Wind turbines, such as tower top, vibrating sensing is arranged on positions in cabin, root of blade etc.
Device, acceleration transducer obtain in real time.Composed of external damping can be applied to the positions such as tower top or cabin, apply the mode of damping
It can be by adjusting modes such as the torques, wheel speed, propeller pitch angle of Wind turbines.Application scheme is important to notice that Wind turbines
Outside added with damping, and the specific location and mode of composed of external damping are not construed as limiting.Secondly, the vibration data to acquisition is known
Not, determine vibration data whether using the first natural frequency of Wind turbines as dominant frequency.In general, will lead to tower under strong gusts of wind
Violent oscillatory motion is generated coming wind direction, which easily causes Wind turbines receiving load excessive and vibration is caused to be shut down.Together
When, the violent oscillatory motion that Wind turbines generate under the strong gusts of wind also largely vibration to be carried out with Wind turbines first natural frequency
It is dynamic, the vibration for vibrating while being also rapid decay under the frequency.
S320, if the vibration amplitude of vibration data is greater than preset secure threshold, and vibration data is with the intrinsic frequency of single order
Rate is dominant frequency, then postpones to issue this vibration early warning.
Wherein, the vibration amplitude generated is corresponded to when the maximum load that secure threshold is born for description Wind turbines, can be
The empirical value of those skilled in the art.In general, being by Wind turbines in cabin axial direction when describing the vibration amplitude of Wind turbines
Vibration amplitude on the direction Ji Laifeng of direction carries out vector superposed rear corresponding with the vibration amplitude in the vertical direction for coming wind direction
Vibration amplitude be determined as comprehensive vibration amplitude.The vibration amplitude of the existing vibration data when Wind turbines is greater than preset peace
When full threshold value, starting early warning can be vibrated immediately, to trigger or notify control centre to carry out vibration shutdown.
This programme difference with the prior art is, when the vibration amplitude of vibration data is greater than preset secure threshold,
Not directly triggering vibration early warning, but first determine whether current vibration acceleration is to be with the first natural frequency of Wind turbines
Dominant frequency, if it is determined that result is yes, then this vibration early warning of first delay sending, and delay time can be the first pre- timing
It is long.In first scheduled duration, wind power generation set system or unit maintenance personnel can be according to the oscillating load situations of Wind turbines
Take unit work on or vibrate shutdown etc. operation, flexibly to Wind turbines carry out working condition adjustment.
It is emphasized that the selected value of the first scheduled duration is critically important, and it can neither be too long, it can not be too short.If time mistake
It is long, and the vibration amplitude of vibration data does not reach this maximum value and declines immediately after being greater than preset secure threshold
Subtract, and be to continue with increase, i.e., Wind turbines vibration load continues growing, and since delay time is too long, cannot in time into
Row protection processing, then will certainly be damaged to Wind turbines；, whereas if the time is too short, though Wind turbines can be with single order
Intrinsic frequency rapid decay is shut down compared with vibration more can be reduced oscillating load suffered by Wind turbines, but on weekly duty in the first two vibration peak
Phase, vibration data decaying are not obvious, may be simultaneously along with the vibration amplitude of vibration data is after being greater than preset secure threshold
It is not to decay immediately, erroneous judgement resulting from, and vibration stoppage protection is taken, oscillating load is increased instead, is reduced simultaneously
The working efficiencies of Wind turbines.Preferably, in the present invention, above-mentioned first scheduled duration is set to the 1.5-3 of vibration data
A vibration period.
The fan vibration pre-warning and control method of the embodiment of the present invention is greater than preset by the vibration amplitude in vibration data
Secure threshold, and vibration data using the first natural frequency of Wind turbines as dominant frequency, then it is pre- to issue this vibration for first delay
Alert first scheduled duration, and judge whether the vibration amplitude of vibration data is greater than safety threshold again at the end of the first scheduled duration
Value；If being not more than secure threshold, this vibration early warning is not issued；If it is greater than secure threshold, then it is pre- to issue this vibration
It is alert, to preferentially select to alleviate by the Wind turbines vibration decaying of itself in the operating condition the vibration reduced suffered by it
Load avoids unnecessary vibration from shutting down, improves the working efficiency of itself.
Embodiment two
Fig. 4 is another flow chart of fan vibration pre-warning and control method provided by the invention, and this method can be considered Fig. 3 institute
Show a kind of specific embodiment of method and step in embodiment.As shown in figure 4, the fan vibration pre-warning and control method includes:
Whether S410 obtains vibration data of the Wind turbines under composed of external damping in real time, and identifies vibration data with wind-powered electricity generation
The first natural frequency of unit is dominant frequency.Step S410 is similar to above mentioned step S3 10.
Specifically, as shown in Figure 1, high wind high vibration usually occurs with first natural frequency in Wind turbines and is decaying
When state is rapid decay, the vibration data in wind direction is used as leading since being all, and the vibration data for coming wind direction relatively carrys out wind
The violent initial time of the vibration of the vibration data of the vertical direction in direction shifts to an earlier date, and more can fast and accurately be caught based on the two features
Obtain the characteristic for facilitating vibration data rapid decay.Therefore, to step S410, this programme gives specific implementation,
Including step S411~S412.
S411, it is real-time to acquire Wind turbines under composed of external damping in the vibration for the vertical direction come wind direction and come wind direction
Data.
For example, acceleration transducer can be installed in tower top, and detects cabin axial direction and come wind direction and come
The vibration data of the vertical direction in wind direction.
Specifically, due to coming wind direction and carrying out the central value of alternating signal in wind vertical direction acceleration due to error often
Not in 0.0g, therefore first with the biasing filtering function being made of low-pass filter, to coming wind direction and carry out wind vertical direction
Bias carries out filtering out processing in acceleration signal.Wind direction and to carry out wind vertical direction acceleration after bias treatment
Signal is above-mentioned vibration data.
S412, if the vibration amplitude for the vibration data for coming wind direction is greater than the vibration data in the vertical direction for coming wind direction
Vibration amplitude, then identification come wind direction vibration data whether using the first natural frequency of Wind turbines as dominant frequency.
The absolute value of the vibration data for the vertical direction come wind direction and come wind direction that will acquire is compared, if
The vibration acceleration absolute value for coming wind direction is greater than the vibration acceleration absolute value for the vertical direction for coming wind direction, then it is assumed that since
The vibration data in wind direction is leading vibration data.At this point, being come wind direction tower first natural frequency using centre frequency
Bandpass filter, extract come wind direction vibration data in tower first natural frequency vibrate vibration acceleration signal,
And identify the first natural frequency whether be dominant frequency vibration signal.
In practical application scene, the vibration amplitude for the vibration data for coming wind direction is greater than in the vertical direction for coming wind direction
Vibration data vibration amplitude, can be used as and judge that fan vibration failure postpones first condition quoting.Reason is to dominate
Can Wind turbines occur for the first natural frequency of the vibration acceleration in direction to realize quickly declining for vibration when strong gusts of wind vibration
Subtract and plays a leading role.Therefore, as long as identification carrys out the vibration data in wind direction whether based on the first natural frequency of Wind turbines
Setting frequency.
Optionally, whether carry out the vibration data in wind direction using the first natural frequency of Wind turbines as dominant frequency in identification
When, it can be used but be not limited to the following two kinds mode.
Mode one extracts the corresponding vibration data of first natural frequency in the vibration data for coming wind direction, if single order is solid
There is the ratio of the virtual value of the vibration data in the direction virtual value Zhan Laifeng of the corresponding vibration data of frequency to be greater than preset ratio value,
Then determine that the vibration data for coming wind direction is using the first natural frequency of Wind turbines as dominant frequency.
Wherein, the virtual value of vibration data is the absolute value of corresponding data.For example, the vibration in wind direction of getting off at a certain moment
The virtual value of dynamic data is a, and preset ratio value is 0.8, then when the virtual value of the vibration acceleration of a certain frequency is greater than 0.8a,
It is believed that the frequency is to carry out the dominant frequency of the vibration data in wind direction.
Mode two, obtain Wind turbines local environment in real time carrys out wind wind speed, if carrying out wind wind speed characterization to carry out wind wind regime to be battle array
Wind, it is determined that the vibration data for coming wind direction is using the first natural frequency of Wind turbines as dominant frequency.
As shown in fig. 1, with oscillating load caused by fitful wind especially strong gusts of wind wind regime, usually initiation Wind turbines with
The principal element that its first natural frequency is vibrated.Therefore, whether it is fitful wind by environment-identification wind regime, then can determine current
Whether Wind turbines are vibrated using the first natural frequency of Wind turbines as dominant frequency.
When carrying out the vibration data in wind direction using the first natural frequency of Wind turbines as dominant frequency, then this condition can be used as
Judge that fan vibration failure postpones second condition quoted.
After this, step S320 can be continued to execute: if the vibration amplitude of vibration data is greater than preset secure threshold,
And vibration data then postpones to issue this vibration early warning using first natural frequency as dominant frequency.
Specifically, based in step 410, whether identification vibration data is using the first natural frequency of Wind turbines as dominant pilot
The step of rate, switchs to identification to carry out the vibration data in wind direction to be when dominating, whether to carry out the vibration data in wind direction with the intrinsic frequency of single order
The step of rate is dominant frequency.The step content of S320 can specifically:
S420 if the vibration amplitude of vibration data is greater than preset secure threshold, and comes wind direction in vibration data
Vibration data then postpones to issue this vibration early warning using first natural frequency as dominant frequency.
If the vibration amplitude of the vibration data of Wind turbines entirety is greater than preset secure threshold, this condition, which is used as, to be sentenced
Disconnected fan vibration failure postpones the third condition quoted.If above three condition meets simultaneously, vibration event can be opened at this time
Barrier is postponed quoting function.
By identification vibration data in come the vibration data in wind direction whether using first natural frequency as dominant frequency, as
Delay issues the Rule of judgment of this vibration early warning, and the effect of later period Wind turbines rapid decay can be improved.
After determining that delay issues this vibration early warning, it can also continue to execute following steps content:
S430 judges that the vibration amplitude of vibration data is again after delay issues this vibration first scheduled duration of early warning
It is no to be greater than secure threshold.
Judge whether the vibration amplitude of vibration data is greater than secure threshold, reason again at the end of the first scheduled duration
It is, when current vibration acceleration is using the first natural frequency of Wind turbines as dominant frequency, if vibration data is proper
Have reached well or close to this vibration highest vibration amplitude, then subsequent vibration amplitude can quickly decline because of first natural frequency
Subtract, even if vibration is not taken to shut down, oscillating load suffered by Wind turbines also can be reduced quickly, and reduce speed far faster than vibration
The vibration rate of decay under shutting down, also there is no need to vibrate early warning certainly.After vibration early warning postpones the first scheduled duration, again
Judge whether the vibration amplitude of vibration data is greater than secure threshold, with confirm postpone vibration early warning it is whether reasonable, and can according to than
Relatively result carries out subsequent processing.
S440 does not issue this vibration early warning if the vibration amplitude of vibration data is not more than secure threshold；If vibration
The vibration amplitude of dynamic data is greater than secure threshold, then issues this vibration early warning.
Terminate in above-mentioned first scheduled duration, after judging whether the vibration amplitude of vibration data is greater than secure threshold again,
It can be proceeded as follows according to judging result.
If the vibration amplitude of vibration data is not more than secure threshold, show Wind turbines in the first scheduled duration
Decay into vibration rapid decay state, and by the vibration of itself intrinsic frequency, can reach the purpose for reducing oscillating load, at this time
This vibration early warning can not be issued, Wind turbines is allowed to continue power generation operation.
If the vibration amplitude of vibration data is greater than secure threshold, show that Wind turbines fail in the first scheduled duration
Vibration by itself intrinsic frequency decays, and achievees the purpose that reducing oscillating load or even oscillating load is also possible to increase, and answers at this time
This vibration early warning is issued, corresponding vibration protection measure is taken to trigger wind turbine, vibration is such as taken to shut down.
After step S440, further includes:
S450 does not restart in each execute in the second scheduled duration after delay issues vibration the first scheduled duration of early warning
Delay issues vibration warning function, and if the vibration amplitude of vibration data is greater than preset safety threshold in the second scheduled duration
Value then directly issues vibration early warning.
For example, the first scheduled duration is 1.5 vibration periods, since being quoted constantly the postponement of fan vibration failure, in wind
Motor group quotes function with the fan vibration postponement in 10 vibration periods of first natural frequency signal, stopping second or more
Can, to prevent Wind turbines from failing the effective attenuation completed in remaining 8.5 doubling times with first natural frequency vibration, at this time
Second scheduled duration is 8.5 vibration periods.
The fan vibration pre-warning and control method of the embodiment of the present invention is further shown on the basis of embodiment shown in Fig. 1
According to judgement: being 1. greater than come the vibration amplitude of the vibration data in wind direction come the vibration data in the vertical direction in wind direction
Vibration amplitude；2. it is leading for carrying out the vibration data in wind direction with the first natural frequency of Wind turbines；3. the vibration of vibration data
Amplitude is greater than preset secure threshold；These three conditions meet simultaneously carrys out trigger delay early warning, improves wind-powered electricity generation after delay early warning
The accuracy of the vibration rapid decay of unit, reduces Wind turbines and is subjected to damage caused by oscillating load.It is holding every time simultaneously
Reaffirm whether to issue this vibration early warning when the first scheduled duration after the vibration early warning of row time lag of first order, and subsequent one
No longer start delay warning function in the section time, when carrying out rapid decay to prevent from only vibrating with Wind turbines first natural frequency
Irreparable oscillating load damage.
Embodiment three
Fig. 5 is the structural schematic diagram of fan vibration prewarning controller provided by the invention, and the device is for executing Fig. 3 institute
Show the method and step of embodiment.As shown in figure 5, the fan vibration prewarning controller includes obtaining identification module 510 and comparing
Postponement module 520；Wherein:
Identification module 510 is obtained, for obtaining vibration data of the Wind turbines under composed of external damping in real time, and identifies vibration
Whether data are using the first natural frequency of Wind turbines as dominant frequency；
Compare Postponement module 520, if the vibration amplitude for vibration data is greater than preset secure threshold, and vibration number
First natural frequency is dominant frequency accordingly, then postpones to issue this vibration early warning.
Further, as shown in fig. 6, on the basis of Fig. 5, obtaining identification module 510 includes acquisition unit 511, is used for
Real-time acquisition Wind turbines are under composed of external damping in the vibration data for the vertical direction come wind direction and come wind direction；
Recognition unit 512, if the vibration amplitude of the vibration data for coming wind direction is greater than the vertical direction for coming wind direction
On vibration data vibration amplitude, then identification come wind direction vibration data whether with the first natural frequency of Wind turbines be
Dominant frequency.
Optionally, above-mentioned recognition unit 512 is specifically used for:
The corresponding vibration data of first natural frequency in the vibration data for coming wind direction is extracted, if first natural frequency pair
The ratio of the virtual value of the vibration data in the direction virtual value Zhan Laifeng for the vibration data answered is greater than preset ratio value, it is determined that comes
The vibration data in wind direction is using the first natural frequency of Wind turbines as dominant frequency.
Optionally, above-mentioned recognition unit 512 is specifically used for:
Obtain Wind turbines local environment in real time carrys out wind wind speed, if carrying out wind wind speed characterization to carry out wind wind regime to be fitful wind, really
Surely the vibration data for coming wind direction is using the first natural frequency of Wind turbines as dominant frequency.
Further, above-mentioned relatively Postponement module 520 is also used to:
If the vibration amplitude of vibration data is greater than preset secure threshold, and carrys out the vibration number in wind direction in vibration data
First natural frequency is dominant frequency accordingly, then postpones to issue this vibration early warning.
Further, fan vibration prewarning controller shown in Fig. 6 further include: warning module 530 is judged, for postponing
Judge whether the vibration amplitude of vibration data is greater than secure threshold again after issuing this vibration first scheduled duration of early warning；It executes
Warning module 540, if not issuing this vibration early warning for being not more than secure threshold；If it is greater than secure threshold, then send out
This vibration early warning out.
Further, above-mentioned fan vibration prewarning controller further include: early warning control module 550, for holding every time
No longer start delay issues vibration warning function in the second scheduled duration after row delay sending vibration the first scheduled duration of early warning,
And vibration early warning is directly issued if the vibration amplitude of vibration data is greater than preset secure threshold in the second scheduled duration.
The fan vibration prewarning controller of the embodiment of the present invention is greater than preset by the vibration amplitude in vibration data
Secure threshold, and vibration data using the first natural frequency of Wind turbines as dominant frequency, then it is pre- to issue this vibration for first delay
Alert first scheduled duration, and judge whether the vibration amplitude of vibration data is greater than safety threshold again at the end of the first scheduled duration
Value；If being not more than secure threshold, this vibration early warning is not issued；If it is greater than secure threshold, then it is pre- to issue this vibration
It is alert, to preferentially select to alleviate by the Wind turbines vibration decaying of itself in the operating condition the vibration reduced suffered by it
Load avoids unnecessary vibration from shutting down, improves the working efficiency of itself.
On this basis, fan vibration prewarning controller, according to judgement: 1. come the vibration of the vibration data in wind direction
Amplitude is greater than the vibration amplitude of the vibration data in the vertical direction for coming wind direction；2. carrying out the vibration data in wind direction with wind turbine
The first natural frequency of group is leading；3. the vibration amplitude of vibration data is greater than preset secure threshold；These three conditions are simultaneously
Meet and carry out trigger delay early warning, improves the accuracy for vibrating rapid decay of Wind turbines after delay early warning, reduce wind turbine
Group is subjected to damage caused by oscillating load.Simultaneously again in the first scheduled duration after executing time lag of first order vibration early warning every time
It is confirmed whether to issue this vibration early warning, and the no longer start delay warning function within subsequent a period of time, to prevent only
Irreparable oscillating load damage when carrying out rapid decay is vibrated with Wind turbines first natural frequency.
It may be noted that all parts/step described in this application can be split as more multi-section according to the needs of implementation
The part operation of two or more components/steps or components/steps can also be combined into new components/steps by part/step,
To achieve the object of the present invention.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (14)
1. a kind of fan vibration pre-warning and control method characterized by comprising
Vibration data of the Wind turbines under composed of external damping is obtained in real time, and identifies the vibration data whether with Wind turbines
First natural frequency is dominant frequency；
If the vibration amplitude of the vibration data is greater than preset secure threshold, and the vibration data is intrinsic with the single order
Frequency is dominant frequency, then postpones to issue this vibration early warning.
2. the method according to claim 1, wherein the real-time vibration for obtaining Wind turbines under composed of external damping
Dynamic data, and identify the vibration data whether using the first natural frequency of Wind turbines include: as dominant frequency
In real time acquisition Wind turbines under composed of external damping come wind direction and it is described come wind direction vertical direction vibration data；
If it is described come wind direction vibration data vibration amplitude be greater than it is described come wind direction vertical direction on vibration data
Vibration amplitude, then identify it is described come wind direction vibration data whether using the first natural frequency of Wind turbines as dominant pilot
Rate.
3. according to the method described in claim 2, it is characterized in that, it is described identification it is described come wind direction vibration data whether with
The first natural frequency of Wind turbines includes: for dominant frequency
Extract it is described come wind direction vibration data described in the corresponding vibration data of first natural frequency, if the single order is solid
Have the virtual value of the corresponding vibration data of frequency account for it is described come wind direction the ratio of virtual value of vibration data be greater than default ratio
Example value, it is determined that it is described come wind direction vibration data be using the first natural frequency of Wind turbines as dominant frequency.
4. according to the method described in claim 2, it is characterized in that, it is described identification it is described come wind direction vibration data whether with
The first natural frequency of Wind turbines includes: for dominant frequency
Obtain Wind turbines local environment in real time and carry out wind wind speed, if it is described come wind wind speed characterization to carry out wind wind regime be fitful wind, really
It is fixed it is described come wind direction vibration data be using the first natural frequency of Wind turbines as dominant frequency.
5. if according to the method described in claim 2, it is characterized in that, the vibration amplitude of the vibration data is greater than in advance
If secure threshold, and the vibration data is using the first natural frequency as dominant frequency, then postpones to issue this vibration pre-
Police includes:
If the vibration amplitude of the vibration data is greater than preset secure threshold, and comes wind direction described in the vibration data
Vibration data using the first natural frequency as dominant frequency, then postpone to issue this vibration early warning.
6. method according to claim 1-5, which is characterized in that the method also includes:
Judge whether the vibration amplitude of the vibration data is greater than the secure threshold again after postponing the first scheduled duration；
If being not more than the secure threshold, this vibration early warning is not issued；If it is greater than the secure threshold, then this is issued
Secondary vibration early warning.
7. according to the method described in claim 6, it is characterized in that, the method also includes:
No longer start delay sending vibration early warning in the second scheduled duration after the first scheduled duration of the delay is being executed every time
Function, and it is direct if the vibration amplitude of the vibration data is greater than preset secure threshold in second scheduled duration
Issue vibration early warning.
8. a kind of fan vibration prewarning controller characterized by comprising
Identification module is obtained, for obtaining vibration data of the Wind turbines under composed of external damping in real time, and identifies the vibration number
According to whether using the first natural frequency of Wind turbines as dominant frequency；
Compare Postponement module, if the vibration amplitude for the vibration data is greater than preset secure threshold, and the vibration
Data then postpone to issue this vibration early warning using the first natural frequency as dominant frequency.
9. device according to claim 8, which is characterized in that the acquisition identification module includes:
Acquisition unit, for acquire in real time Wind turbines under composed of external damping come wind direction and it is described come wind direction Vertical Square
To vibration data；
Recognition unit, if for it is described come wind direction vibration data vibration amplitude be greater than it is described come wind direction vertical direction
On vibration data vibration amplitude, then identify it is described come wind direction vibration data whether with the intrinsic frequency of the single order of Wind turbines
Rate is dominant frequency.
10. device according to claim 9, which is characterized in that the recognition unit is specifically used for:
Extract it is described come wind direction vibration data described in the corresponding vibration data of first natural frequency, if the single order is solid
Have the virtual value of the corresponding vibration data of frequency account for it is described come wind direction the ratio of virtual value of vibration data be greater than default ratio
Example value, it is determined that it is described come wind direction vibration data be using the first natural frequency of Wind turbines as dominant frequency.
11. device according to claim 9, which is characterized in that the recognition unit is specifically used for:
Obtain Wind turbines local environment in real time and carry out wind wind speed, if it is described come wind wind speed characterization to carry out wind wind regime be fitful wind, really
It is fixed it is described come wind direction vibration data be using the first natural frequency of Wind turbines as dominant frequency.
12. device according to claim 9, which is characterized in that the relatively Postponement module is also used to:
If the vibration amplitude of the vibration data is greater than preset secure threshold, and comes wind direction described in the vibration data
Vibration data using the first natural frequency as dominant frequency, then postpone to issue this vibration early warning.
13. according to the described in any item devices of claim 8-12, which is characterized in that described device further include:
Warning module is judged, for judging whether the vibration amplitude of the vibration data is big again after postponing the first scheduled duration
In the secure threshold；
Warning module is executed, if not issuing this vibration early warning for being not more than the secure threshold；If it is greater than described
Secure threshold then issues this vibration early warning.
14. device according to claim 13, which is characterized in that described device further include: early warning control module is used for
No longer start delay issues vibration warning function in the second scheduled duration after executing the first scheduled duration of the delay every time, and
Vibration is directly issued if the vibration amplitude of the vibration data is greater than preset secure threshold in second scheduled duration
Dynamic early warning.
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| CN108167105B (en) * | 2017-11-28 | 2020-08-04 | 四川谊田集群科技有限公司 | Hydraulic unit vibration accident shutdown protection method and device |
| CN112412701A (en) * | 2019-01-28 | 2021-02-26 | 柳盼 | Vibration control method for wind turbine generator tower |
| CN111665047B (en) * | 2019-03-07 | 2024-04-02 | 北京金风慧能技术有限公司 | Method, device, equipment and medium for identifying vibration signals of wind generating set |
| US11585824B2 (en) * | 2020-10-27 | 2023-02-21 | Infineon Technologies Ag | Vibration compatible watchdog for speed sensors |
| CN113654803B (en) * | 2021-08-19 | 2024-05-24 | 中国联合重型燃气轮机技术有限公司 | Gas turbine vibration abnormality early warning method and device and electronic equipment |
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