CN107725286A - A kind of wind power generating set based on inverse time lag control, which freezes, detects control method - Google Patents
A kind of wind power generating set based on inverse time lag control, which freezes, detects control method Download PDFInfo
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- CN107725286A CN107725286A CN201711061388.6A CN201711061388A CN107725286A CN 107725286 A CN107725286 A CN 107725286A CN 201711061388 A CN201711061388 A CN 201711061388A CN 107725286 A CN107725286 A CN 107725286A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 15
- 230000007613 environmental effect Effects 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims 1
- 238000010977 unit operation Methods 0.000 abstract description 4
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- 230000005611 electricity Effects 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000002604 ultrasonography Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/40—Ice detection; De-icing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
-
- 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
- F05B2270/328—Blade pitch angle
-
- 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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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention belongs to technical field of wind power generator, and in particular to a kind of wind power generating set based on inverse time lag control, which freezes, detects control method.The wind power generating set based on inverse time lag control, which freezes, detects control method, according to ambient parameter is monitored, the collection of associated sensor data and the setting of unit operation parameter, the icing that unit is performed by icing determination module judges and provides corresponding icing grade classification.By the way that to icing grade analysis, propeller pitch angle operation corresponding to execution controls or unit safety shutdown operation.Its advantage is：This method can accurate detection blower fan blade ice condition, detection is accurate, reliability is high, cost is low；And the icing operation of unit and safe shutdown operation under basic full blast speed section can be controlled, improve the availability and security of unit.
Description
Technical field
The invention belongs to technical field of wind power generator, and in particular to a kind of wind power generating set based on inverse time lag control
Freeze detection control method.
Background technology
With the expansion of wind-power market, blower fan progressively develops to low wind speed area or ultralow wind speed area.However, wind-resources compared with
Good region is typically in the of a relatively high area of height above sea level, and winter humidity is larger in addition, easily occurs blade knot when temperature is relatively low
Ice condition condition.Blade, which freezes, easily causes airfoil geometry alteration of form, and Blade Properties decline, and impeller lift reduces.With ice covering thickness
Increase and icing surface area are different, easily cause impeller weight unbalanced, cause complete machine operation fatigue load excessive, generate electricity effect
Rate reduces, or even leaf destruction, the performance and service life of serious influence wind power generating set.
The A of patent CN 102410140 provide a kind of blade of wind-driven generator icing Autonomous test and safety running control
Method, as shown in Figure 1.This method is controlled by meteorological detection module, risk of icing class computing module and ice carrying row
Module realizes the detection and operation that unit freezes.This method can accurately judge the icing possibility of unit and can pass through icing
Sensor judges icing grade classification corresponding to ice condition execution, and judgment basis is provided for follow-up ice carrying row switching.So
And the patent improves the judgement of icing possibility accuracy by adding more hardware detection, complete machine monitoring is added
Cost.The A of patent CN 103912449 provide a kind of method for increasing unit safety under blade ice condition.When detecting
When blade freezes, by blade feathering and head is set to deviate certain angle with tower door, personal peace will not be caused by ensureing that ice-melt is fallen
Full harm.After the contact that freezes, hand-reset starts unit.The patent can improve the security under unit ice condition, but
Icing safe operation is not illustrated.The A of patent CN 104314756 provide safe shutdown under a kind of unit ice condition
Mode.Determine whether to perform shutdown operation by carrying out icing thickness detection, 0 ° to -90 ° action is performed when shutting down, is avoided
Blade inlet edge icing change airfoil structure causes certain propeller pitch angle to be referred to as optimal propeller pitch angle in routine.Sentence subsequently through high speed rotating speed
Brake is performed calmly, now performing feathering of three blades from -90 ° to 90 ° according to wind conditions acts.The patent considers unit leaf
The change of piece icing aerofoil profile may result in the situation that optimal propeller pitch angle changes and perform shutdown, by performing 0 to -90 ° of halt modes
Solves the problem.However, this mode can not utilize the generated energy of unit under ice condition to greatest extent, excessive considers
Icing harmfulness, it have lost the generated energy under low wind speed.The A of patent CN 104454386 propose a kind of blade freeze detection and
The method of unit icing operation.By freezing sensor and combining environmental condition and unit operation parameter, turbines vane is detected
Icing possibility.Different icings is performed according to icing degree and runs control.Under the patent is by setting under corresponding air speed value
Limit rotating speed, exceedes setting value in wind speed and rotating speed maintains the time of lower limit rotating speed as judgement icing degree method.However, should
Method does not increase for the unit more serious conditions rotating speed that freezes, but wind speed it is very big in the case of can not perform safer machine
Group operation operation；And can not be judged for ice condition is slight by speed conditions, so for the slight knot of blade
The situation of ice lacks further judgement ice-formation condition.
The content of the invention
A kind of the defects of present invention is in order to make up prior art, there is provided wind power generating set knot based on inverse time lag control
Ice detects control method.
The present invention is achieved through the following technical solutions：
A kind of wind power generating set based on inverse time lag control, which freezes, detects control method, including：Environmental monitoring system, testing the speed is
System, icing determination module and control execution module, environment at temperature sensor monitors nacelle position in the environmental monitoring system
Temperature data, wind speed and direction sensor-based system monitor wind speed and wind direction data situation of change and do sensor faults itself monitoring；
Wind speed and direction sensor-based system includes air velocity transducer and wind transducer, the wheel speed of air velocity transducer monitoring unit and generating
Machine rotating speed；Icing determination module is handled and analyzed to the filtering air speed data and filtering rotary speed data that are gathered, by each
From inverse time lag control module carry out flag bit judgement and numerical value judgement, by flag bit judge provide unit freeze sentence
Fixed, sensor fault judges and unit normal operation judges etc.；It is mainly the place to unit ice condition to control execution module
Reason and operation control.
Further explanation as above-mentioned technical proposal：
Preferably, the environmental monitoring system mainly carries out data monitoring, temperature to temperature sensor, wind speed and direction sensor-based system
Sensor by being acquired to cabin external environment temperature data, when environment temperature be more than 0, judge without ice-formation condition；When
Environment temperature is less than 0, then judges one of input condition as ice-formation condition.
Preferably, after icing decision condition being met to environment temperature, wind speed and direction sensor-based system data are judged, wind
Fast wind direction sensor-based system includes wind speed and direction sensor-based system 1 and wind speed and direction sensor-based system 2, according to control wind speed and direction sensing
System 1 and wind speed and direction sensor-based system 2 are not analyzed its own failure situation as judgement unit icing standard, then
It is likely to occur wind speed and direction sensor-based system 1 and icing is present, and by chance there is faults itself in wind speed and direction sensor-based system 2, according to
The data of wind speed and direction sensor-based system 1 then need to judge icing possibility by other specification, if but being passed by gathering wind speed and direction
The data of sensing system 2 gather as normal wind speed, then in its failure and blade aerodynamic performance improves, easily cause to freeze report by mistake or
It is not report, can now causes unit availability to reduce or in ice carrying row, influence unit safety.
Preferably, wind speed and direction sensor-based system 1 uses mechanical wind speed and direction sensor-based system, wind speed and direction sensor-based system 2
Using ultrasonic wind speed and direction sensor-based system, pass through mechanical wind speed and direction sensor-based system and ultrasonic wind speed and direction sensor-based system
As in judgement icing possibility, ultrasonic wind speed and direction sensor-based system is possible in the absence of freezing at low temperature, and mechanical wind
The possibility that freezes easily occurs for fast wind direction sensor-based system, can be used as good control sensor；On the other hand, to ultrasonic wind speed
Processing is have also been made in the case of wind direction sensor-based system faults itself, in its failure, switches to mechanical wind speed and direction sensor-based system,
Still ice condition can effectively be judged.
Preferably, the velocity-measuring system mainly gathers the wheel speed and generator speed data of unit, as unit number
According to the data input of acquisition monitoring.
Preferably, the icing determination module, which is mainly realized, gathers to filtering wind speed and filtering rotary speed data and passes through wind speed
Inverse time lag module and rotating speed inverse time lag module carry out the judgement of icing pattern trigger signal, wind speed of the decision method based on unit
And tach signal, and the flag bit for combining inverse time lag control gives sentencing for unit icing possibility under different wind speed and tach signal
Fixed, this method not only can be determined that ice condition, and can be determined that out unit normal operation and monitoring sensor event
Barrier judges that the formula that wind speed inverse time lag module and rotating speed inverse time lag module use is as follows：
(1)
（2）
It should be noted thatRepresent that unit freezes delay one of them reference time of judgement；Represent that unit icing delay is sentenced
Another fixed reference time；Unit actual wind speed filtering wind speed is represented,Represent that unit refers to wind speed threshold value；Represent
The actual filtering rotating speed of unit；Represent unit reference rotation velocity threshold value；Represent wind speed inverse time-lag constant（Desirable 1.5~
2.5）；Represent rotating speed inverse time-lag constant（Desirable 1~1.5）；M and n is constant, value 2.
Preferably, when being judged according to wind speed inverse time lag module, frozen by setting with reference to wind speed threshold value
The calculating of delay time and the judgement of flag bit 1, typically take with reference to wind speed threshold value（85%~90%）Rated wind speed, in actual wind
Speed is less than when referring to wind speed,For negative；Otherwise its value is positive number, when being judged according to rotating speed inverse time lag module, by setting
Reference rotation velocity threshold value is determined to carry out the calculating of icing delay time and the judgement of flag bit 2.Reference rotation velocity threshold value typically takes（90%
~95%）Rated speed, actually turn be less than reference rotation velocity when,It is otherwise positive number for negative.According toWithNumerical value can be with
Given different flag bit, subsequently carries out the judgement of icing pattern and other patterns according to flag bit.
It should be noted that=Or=When, calculate and infinity occur, therefore filter wind speed and rotating speed to need
Do numerical value to redirect, avoid this referential data point.Typically when this kind of situation occurs, actual wind speed limitation is given（95%~
98%）It is limited in rotating speed（95%~98%）。
Preferably, unit triggers icing pattern 2 under icing pattern, now unit flag bit：=TRUE,=TRUE,
It is exactly that now wind speed exceedes wind speed threshold value and rotating speed exceedes rotary speed threshold value.Can now there are two kinds of situations：1) unit normal mode,
Blade is without icing；2）Blade may freeze.For the possible ice condition of blade, it is necessary to judge whether power exceedes setting PsetCome
Further judge ice condition.Wind speed is larger when therefore and the power of the assembling unit to compare normal power relatively low, now in order to ensure unit
Complete machine carry out stoppage protection action safely and provide icing halt instruction.
Preferably, unit triggers icing pattern 1 under icing pattern, and now unit is in rated wind speed and its hair of the above
Electricity condition or the idling conditions that do not generate electricity.Now pass through determination flag position=TRUE,=FALSE, i.e., in the larger situation of wind speed
The rotating speed of lower unit is relatively low, so as to judge that unit is in icing condition.
Preferably, in unit flag bit=FALSE,=TRUE, now unit be in small wind speed but generator speed mistake
Height, typically there are two kinds of possibility.One is anemobiagraph failure；Secondly it is speed probe failure.General control group anemobiagraph has
Low-temperature resistance characteristic, its own simultaneous faults probability is relatively low, then can confirm that as speed probe failure.Rotating speed can be now used as
The mode that sensor fault judges.
Preferably, in unit flag bit=FALSE,=FALSE, now unit be in small wind speed and slow-speed of revolution situation, i.e.,
Make ice condition also not entail dangers to unit safety, therefore this situation is defaulted as unit safety operation situation occur.
Preferably, it is described to control execution module to perform different operations according to the different icing patterns that unit gives.
When unit gives icing pattern 1, normal operating condition is maintained and according to delay time Min if unit is in generating state（,）Provide icing warning；If unit is in non-power generating state, delay time Min is now given（,）Quote icing police
Accuse, by sectionDynamic changes the propeller pitch angle of unit, remains dynamic after judging that unit can realize simultaneously net operation
The propeller pitch angle of state setting.When unit gives icing pattern 2, now moved to ensure that the complete machine of unit carries out safely stoppage protection
Make and give delay time Min to this（,）Go out the halt instruction that freezes.
Compared with prior art, the advantage of the invention is that：
The modes such as cabin external environment monitoring temperature, wind speed based on routine-wind direction data collection, rotary speed data collection, and pass through
Set the accuracy of two groups of wind speed and direction sensor-based system enhancing air speed datas.By the determination module that frozen in main control PLC, using anti-
Time limit control method, it can effectively judge the ice condition of turbines vane.Wind speed has been taken into full account in icing determination module, has been turned
Speed and three important parameters of power, and according to wind speed inverse time lag module and the icing mould of rotating speed inverse time lag module judgement unit
Formula, sensor fault and normal mode.Different icings is given according to icing pattern and performs control, is realized that unit freezes and is transported
Row, freeze and shut down the judgement of two ways.By above-mentioned control method, the reliability that unit icing judges is improved, and lead to
Given different icing pattern is crossed, the generated energy under unit icing condition is improved and ensure that the safety of unit.
The beneficial effect of this patent is：
Based on existing patent feature, the main advantage of this patent is：
1) judged by being monitored to wind speed and direction sensor-based system faults itself, eliminate and tied caused by control sensor faults itself
Ice report by mistake so as to cause generated energy to lose, equally eliminate freeze can not monitoring band come the excessive situation of unit fatigue load,
It is capable of the blade icing possibility of effective monitoring unit；
2) by using inverse time lag control mode, the icing possibility, sensor fault form and unit of unit be can confirm that
Normal operation mode, and accurately and reliably；
3) by the way that to performing different control modes under different icing patterns, generated energy of the unit under ice condition can be improved
And availability, and ensure that unit freezes the security of operation under strong wind；
4) by inverse time lag control mode, the ice condition that can be directed to unit carries out time adjustment, improves the Shandong for the detection that freezes
The security of rod and unit.
Frozen by the wind generator set blade controlled based on the inverse time lag and detect control method, supervised according to ambient parameter
Control, the collection of associated sensor data and the setting of unit operation parameter, the icing of unit is performed by icing determination module
Judge and provide corresponding icing grade classification.By to icing grade analysis, propeller pitch angle operation control corresponding to execution or
Unit safety shutdown operation.This method can accurate detection blower fan blade ice condition, detection is accurate, reliability is high,
Cost is low；And the icing operation of unit and safe shutdown operation under basic full blast speed section can be controlled, improve unit can profit
With rate and security.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings.
Accompanying drawing 1 is this patent general system set-up block diagram；
Accompanying drawing 2 is that this patent wind speed and direction sensor-based system detects process decision chart；
Accompanying drawing 3 is that flow chart is embodied in this patent.
In figure, 1 temperature sensor；2 icing determination modules；3 control execution modules；4 air velocity transducers；5 wind transducers；
6 speed probes.
Embodiment
This patent proposes that a kind of wind generator set blade based on inverse time lag control freezes and detects control method, according to right
Ambient parameter monitoring, the collection of associated sensor data and the setting of unit operation parameter, are performed by icing determination module 2
The icing of unit judges and provides corresponding icing grade classification.By the way that to icing grade analysis, propeller pitch angle corresponding to execution is transported
Row control or unit safety shutdown operation.This method can accurate detection blower fan blade ice condition, detection is accurate,
Reliability is high, cost is low；And the icing operation of unit and safe shutdown operation under basic full blast speed section can be controlled, improve machine
The availability and security of group.
To make the purpose of the embodiment of the present invention, technical scheme clearer, with reference to the related attached of the embodiment of the present invention
Figure, is completely described to the embodiment of the present invention.The embodiment of this patent description is part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
The every other embodiment obtained, belongs to the scope of protection of the invention.
Specific embodiment
Accompanying drawing 1 freezes for a kind of wind generator set blade based on inverse time lag control provided by the invention detects controlling party
The system block diagram of method, specific implementation are as follows：
Accompanying drawing 1 gives the whole flow process block diagram that unit freezes detection control method, a kind of wind-force hair based on inverse time lag control
Motor blade, which freezes, detects control method, it is characterised in that including：
The icing detecting and controlling system mainly includes：Environmental monitoring system, temperature sensor 1, wind speed and direction sensor-based system, test the speed
System, icing determination module 2 and control execution module 3, temperature sensor 1 is monitored at nacelle position in the environmental monitoring system
Ambient temperature data；Wind speed and direction sensor-based system monitor wind speed and wind direction data situation of change and do sensor faults itself prison
Control；Wind speed and direction sensor-based system includes air velocity transducer 4 and wind transducer 5, and air velocity transducer 4 monitors the wheel speed of unit
And generator speed；Icing determination module 2 is handled and analyzed to the filtering air speed data and filtering rotary speed data that are gathered,
The judgement of flag bit and the judgement of numerical value are carried out by respective inverse time lag control module, by judging flag bit to provide unit
Freeze judgement, sensor fault judgement and the judgement of unit normal operation etc.；Execution module 3 is controlled predominantly to unit icing feelings
The processing and operation of condition control.
The environmental monitoring system, main include carry out data monitoring to temperature sensor 1, wind speed and direction sensor-based system,
Temperature sensor 1 by being acquired to cabin external environment temperature data, when environment temperature be more than 0, sentence without ice-formation condition
It is fixed；When environment temperature is less than 0, then one of input condition is judged as ice-formation condition.
After meeting icing decision condition to environment temperature, wind speed and direction sensor-based system data are judged, wind speed and direction
Sensor-based system includes wind speed and direction sensor-based system 1 and wind speed and direction sensor-based system 2, according to control wind speed and direction sensor-based system 1
With wind speed and direction sensor-based system 2 as judgement unit icing standard, but its own failure situation is not analyzed, then may gone out
Existing wind speed and direction sensor-based system 1, which exists, to freeze, and faults itself by chance occurs in wind speed and direction sensor-based system 2, now both data
Easily there is the actual icing of unit in contrast but master control is detected and do not reported, and causes unit to influence unit safety, wind speed and wind in ice carrying row
Mechanical wind speed and direction sensor-based system is used to sensor-based system 1, wind speed and direction sensor-based system 2 is sensed using ultrasonic wind speed and direction
System, it is used as by mechanical wind speed and direction sensor-based system and ultrasonic wind speed and direction sensor-based system and is judged in icing possibility,
In using mechanical wind speed and direction sensor-based system and ultrasonic wind speed and direction sensor-based system as icing possibility is judged, ultrasound
Ripple wind speed and direction sensor-based system is possible in the absence of freezing at low temperature, and mechanical wind speed and direction sensor-based system easily freezes
May, good control sensor can be used as；On the other hand, in the case of to ultrasonic wind speed and direction sensor-based system faults itself
Processing is have also been made, still ice condition can effectively be judged.
Velocity-measuring system mainly gathers the wheel speed and generator speed data of unit, as unit data acquisition monitoring
Data input.
The icing determination module 2, which is mainly realized, to be gathered to filtering wind speed and filtering rotary speed data and passes through the wind speed inverse time lag
Module and rotating speed inverse time lag module carry out the judgement of icing pattern trigger signal.Wind speed and rotating speed of the decision method based on unit
Signal, and the flag bit for combining inverse time lag control gives the judgement of unit icing possibility under different wind speed and tach signal.Should
Method not only can be determined that ice condition, and can be determined that out that unit normal operation and monitoring sensor failure are sentenced
It is fixed.The formula that wind speed inverse time lag module and rotating speed inverse time lag module use is as follows：
Specifically,Represent that unit freezes delay one of them reference time of judgement；It is another to represent that unit icing delay judges
One reference time；Unit actual wind speed filtering wind speed is represented,Represent that unit refers to wind speed threshold value；Represent that unit is real
Border filters rotating speed；Represent unit reference rotation velocity threshold value；Represent wind speed inverse time-lag constant（Desirable 1.5~2.5）；Table
Show rotating speed inverse time-lag constant（Desirable 1~1.5）；M and n is constant, value 2.
Specifically, when being judged according to wind speed inverse time lag module, frozen by setting with reference to wind speed threshold value
The calculating of delay time and the judgement of flag bit 1.Typically taken with reference to wind speed threshold value（85%~90%）Rated wind speed, in actual wind
Speed is less than when referring to wind speed,For negative；Otherwise its value is positive number.When being judged according to rotating speed inverse time lag module, by setting
Reference rotation velocity threshold value is determined to carry out the calculating of icing delay time and the judgement of flag bit 2.Reference rotation velocity threshold value typically takes（90%
~95%）Rated speed, actually turn be less than reference rotation velocity when,It is otherwise positive number for negative.According toWithNumerical value can be with
Given different flag bit, subsequently carries out the judgement of icing pattern and other patterns according to flag bit.
It should be noted that=Or=When, calculate and infinity occur, therefore filter wind speed and rotating speed to need
Do numerical value to redirect, avoid this referential data point.Typically when this kind of situation occurs, actual wind speed limitation is given（95%~
98%）It is limited in rotating speed（95%~98%）。
Preferably, unit triggers icing pattern 2 under icing pattern, now unit flag bit：=TRUE,=TRUE.
It is exactly that now wind speed exceedes wind speed threshold value and rotating speed exceedes wind speed threshold value.Can now there are two kinds of situations：1) unit normal mode,
Blade is without icing；2）Blade may freeze.For the possible ice condition of blade, it is necessary to judge whether power exceedes setting PsetCome
Further judge ice condition.Wind speed is larger and power is relatively low when therefore, now in order to ensure that the complete machine of unit is stopped safely
Machine protection act simultaneously provides icing halt instruction.
Preferably, unit triggers icing pattern 1 under icing pattern, and now unit is in rated wind speed and its hair of the above
Electricity condition or the idling conditions that do not generate electricity.Now pass through determination flag position=TRUE,=FALSE, i.e., in the larger situation of wind speed
The rotating speed of lower unit is relatively low, so as to judge that unit is in icing condition.
Preferably, in unit flag bit=FALSE,=TRUE, now unit be in small wind speed but generator speed mistake
Height, typically there are two kinds of possibility.One is anemobiagraph failure；Secondly it is the failure of speed probe 6.General control group anemobiagraph has
Low-temperature resistance characteristic, its own simultaneous faults probability is relatively low, then can confirm that as the failure of speed probe 6.It can now be used as and turn
One mode of the fast fault verification of sensor 6.
Preferably, in unit flag bit=FALSE,=FALSE, now unit be in small wind speed and slow-speed of revolution situation, i.e.,
Make ice condition also not entail dangers to unit safety, therefore this situation is defaulted as unit safety operation situation occur.
The control execution module 3 is that the different icing patterns given according to unit perform different operations.In unit
During given icing pattern 1, normal operating condition is maintained and according to delay time Min if unit is in generating state（,）
Provide icing warning；If unit is in non-power generating state, delay time Min is now given（,）Icing warning is quoted, is passed through
In sectionDynamic changes the propeller pitch angle of unit, is judging that unit can be realized and maintenance dynamic is set after net operation
Propeller pitch angle.When unit gives icing pattern 2, now in order to ensure the complete machine of unit safely carry out stoppage protection action and to
The given delay time Min（,）Go out the halt instruction that freezes.
Finally it should be noted that：Above example is merely to illustrate technical scheme, rather than its limitations；Reference
The present invention is described in detail previous embodiment, it will be understood by those within the art that：To previous embodiment
The modification of technical scheme carries out equivalent substitution to which part or all technical characteristic, and these modifications are still in the present invention
The technical reform scheme scope of embodiment.
The present invention is not limited to the above-described embodiments, anyone should learn the present invention enlightenment under make with the present invention
With same or like technical scheme, each fall within protection scope of the present invention.
The present invention be not described in detail technology, shape, construction part be known technology.
Claims (7)
- The detection control method 1. a kind of wind power generating set based on inverse time lag control freezes, including：Environmental monitoring system, test the speed System, icing determination module and control execution module, it is characterised in that；In the detection that freezes, whether environmental condition is detected first Meet ice-formation condition, by ambient temperature data at temperature sensor monitors nacelle position in environmental monitoring system, according to temperature An enabled condition of the data situation as logic decision in unit icing detection module；After environmental condition meets, pin Sensed to wind speed and direction sensor-based system monitor wind speed and wind direction data situation of change, and according to data situation in master control Device faults itself monitors, for realizing the switching of non-faulting wind speed and direction sensor-based system, it is ensured that the data that master control detection is read Accurately and reliably；For velocity-measuring system, by the digital independent to the proximity switch that tested the speed at main shaft and at generator, measuring unit Wheel speed and generator speed；Above-mentioned measurement data and result of determination are given into the determination module that frozen in master control, the module pair The filtering air speed data and filtering rotary speed data gathered is via wind speed inverse time lag control module and survey in environmental monitoring system Rotating speed inverse time lag control module carries out the judgement of flag bit and the judgement of numerical value in speed system, by disparate modules mark hyte Logical judgement provides unit icing judgement, sensor fault judges and unit normal operation judges.
- The detection control method 2. a kind of wind power generating set based on inverse time lag control according to claim 1 freezes, its It is characterized in：The icing determination module is made up of two main modulars of wind speed inverse time lag module and rotating speed inverse time lag module.
- The detection control method 3. a kind of wind power generating set based on inverse time lag control according to claim 1 or 2 freezes, It is characterized in that：Wind speed threshold value is 85%~90% rated wind speed value in the wind speed inverse time lag module；Sentenced according to filtering air speed value Determine Boolean denotation positionSituation of change, according to it be TRUE or FALSE, icing index carried out with reference to rotating speed inverse time lag module The judgement of position.
- The detection control method 4. a kind of wind power generating set based on inverse time lag control according to claim 1 or 2 freezes, It is characterized in that：Rotary speed threshold value is 90%~95% rated speed in the rotating speed inverse time lag module；Judged according to filtering tachometer value Boolean denotation positionSituation of change, according to it be TRUE or FALSE, icing index position carried out with reference to wind speed inverse time lag module Judgement.
- The detection control method 5. a kind of wind power generating set based on inverse time lag control according to claim 1 freezes, its It is characterized in：The inverse time lag module needs the rated speed of setting 95%~98% to avoid speed dead bend；To the wind speed inverse time lag , it is necessary to set 95%~98% rated wind speed to avoid wind speed dead band in module.
- The detection control method 6. a kind of wind power generating set based on inverse time lag control according to claim 2 freezes, its It is characterized in：The wind speed inverse time lag flag bit and rotating speed inverse time lag flag bit are when it is all TRUE to judge two flag bits, now Unit rotating speed under windy conditions is higher, in order to ensure unit strong wind icing safety in operation, it is necessary to judge the online work(of unit The size of rate score and theoretical power (horse-power) is, it is necessary to which explanation is 0.8≤≤0.9, when judging to meet condition by holding Row module performs safe shutdown under unit ice-formation condition and operated.
- The detection control method 7. a kind of wind power generating set based on inverse time lag control according to claim 1 or 6 freezes, It is characterized in that：The execution module performs different operations according to the different icing patterns that unit gives, in the given knot of unit During ice pattern 1, normal operating condition is maintained and according to delay time Min if unit is in generating state（,）Provide knot Ice alerts；If unit is in non-power generating state, delay time Min is now given（,）Icing warning is quoted, by sectionDynamic changes the propeller pitch angle of unit, and the pitch of dynamic setting is maintained after judging that unit can realize simultaneously net operation Angle, when unit gives icing pattern 2, now in order to ensure that the complete machine of unit carries out safely stoppage protection action and given to this Delay time Min（,）Going out the halt instruction that freezes, delay time takes the absolute value of respective value,3 °~8 ° of value.
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| CN111075661A (en) * | 2019-12-25 | 2020-04-28 | 明阳智慧能源集团股份公司 | Method for judging health condition of main shaft bearing of wind turbine generator based on temperature change trend |
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