CN107725286B - A kind of wind power generating set icing detection control method based on inverse time lag control - Google Patents
A kind of wind power generating set icing detection control method based on inverse time lag control Download PDFInfo
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- CN107725286B CN107725286B CN201711061388.6A CN201711061388A CN107725286B CN 107725286 B CN107725286 B CN 107725286B CN 201711061388 A CN201711061388 A CN 201711061388A CN 107725286 B CN107725286 B CN 107725286B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 230000007613 environmental effect Effects 0.000 claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 5
- 230000008014 freezing Effects 0.000 claims description 5
- 238000007710 freezing Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
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- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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
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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
- 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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- 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 icing detection control method based on inverse time lag control.The wind power generating set based on inverse time lag control, which freezes, detects control method, according to environmental parameter is monitored, the acquisition of associated sensor data and the setting of unit operating parameter, determined by the icing that icing determination module executes unit and provide corresponding icing grade classification.By executing corresponding propeller pitch angle operation control or unit safety shutdown operation to icing grade analysis.The beneficial effect is that: this method can accurate detection blower fan blade ice condition, detection is accurate, high reliablity, at low cost；And can control the icing operation of unit and safe shutdown operation under basic full blast speed section, improve the availability and safety 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 technique
With the expansion of wind-power market, blower gradually develops to low wind speed area or ultralow wind speed area.However, wind-resources compared with
Good region is typically in the relatively high area of height above sea level, and winter humidity is larger in addition, and blade knot is easy to appear when temperature is lower
Ice condition condition.Blade icing is easy to cause airfoil geometry shape to change, and Blade Properties decline, impeller lift reduces.With ice covering thickness
Increase and icing surface area is different, be easy to cause impeller weight unbalanced, causes complete machine operation fatigue load excessive, power generation effect
Rate reduces or even leaf destruction, the serious performance and service life for influencing wind power generating set.
Patent CN102410140A provides a kind of blade of wind-driven generator icing self-test and safety running control side
Method, as shown in Fig. 1.This method passes through meteorological detection module, risk of icing class computing module and ice carrying row and controls mould
Block realizes the detection and operation that unit freezes.This method can accurately determine the icing possibility of unit and can be passed by freezing
Sensor determines that ice condition executes corresponding icing grade classification, provides judgment basis for the switching of subsequent ice carrying row.However,
The patent improves the judgement of icing possibility accuracy by adding more hardware detection, increase complete machine monitoring at
This.Patent CN103912449A provides a kind of method for increasing unit safety under blade ice condition.When detecting blade
When icing, by blade feathering and head and tower door is made to deviate certain angle, guaranteeing that ice-melt is fallen not will cause personal safety danger
Evil.After the contact that freezes, hand-reset starts unit.The safety under unit ice condition can be improved in the patent, but not right
The safe operation that freezes is illustrated.Patent CN104314756A provides a kind of mode of safe shutdown under unit ice condition.
Determine whether to execute shutdown operation by carrying out detection to icing thickness, 0 ° to -90 ° movement is executed when shutting down, avoids routine
Middle blade inlet edge icing changes airfoil structure and certain propeller pitch angle is caused to be known as optimal propeller pitch angle.It is held subsequently through the judgement of high speed shaft revolving speed
Row brake executes feathering of three blades from -90 ° to 90 ° according to wind conditions at this time and acts.The patent considers turbines vane knot
The variation of ice aerofoil profile may result in the case where optimal propeller pitch angle changes and execute shutdown, be solved by executing 0 to -90 ° of halt modes
The problem.However, this mode cannot be to greatest extent using the generated energy of unit under ice condition, excessive consideration freezes
Harmfulness has lost the generated energy under low wind speed.Patent CN104454386 A proposes a kind of blade and freezes detection and unit knot
The method of ice operation.By freezing sensor and combining environmental condition and unit operating parameter, the icing for detecting turbines vane can
It can property.Different icing operation control is executed according to icing degree.The patent corresponds to the lower limit rotating speed under air speed value by setting,
It is more than that setting value and revolving speed maintain time of lower limit rotating speed as determining icing degree method in wind speed.However, this method needle
It does not increase to the more serious situation revolving speed of unit icing, but safer unit operation can not be executed in the very big situation of wind speed
Operation；And it is slight for ice condition can not be determined by speed conditions, the feelings slightly to freeze for blade in this way
Condition lacks further judgement ice-formation condition.
Summary of the invention
In order to compensate for the shortcomings of the prior art, the present invention provides a kind of wind power generating set knots 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 icing detection control method based on inverse time lag control, comprising: environmental monitoring system, survey
Speed system, icing determination module and control execution module, in the environmental monitoring system at temperature sensor monitoring nacelle position
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 and wind transducer, air velocity transducer monitor unit wheel speed and
Generator speed；Icing determination module is handled and is analyzed to filtering air speed data collected and filtering rotary speed data, is passed through
It crosses respective inverse time lag control module and carries out the judgement of flag bit and the judgement of numerical value, by providing unit knot to flag bit judgement
Ice determines, sensor fault determines and unit operates normally judgement etc.；Execution module is controlled predominantly to unit ice condition
Processing and operation control.
Further explanation as above-mentioned technical proposal:
Preferably, the environmental monitoring system mainly carries out data monitoring to temperature sensor, wind speed and direction sensor-based system,
Temperature sensor by being acquired to cabin external environment temperature data, when environment temperature be greater than 0, sentence without ice-formation condition
It is fixed；When environment temperature is less than 0, then as one of ice-formation condition judgement input condition.
Preferably, after meeting icing decision condition to environment temperature, wind speed and direction sensor-based system data are determined, wind
Fast wind direction sensor-based system includes wind speed and direction sensor-based system one and wind speed and direction sensor-based system two, is passed according to control wind speed and direction
Sensing system one and wind speed and direction sensor-based system two do not divide its own fault condition as judgement unit icing standard
Analysis is then likely to occur wind speed and direction sensor-based system one and there is icing, and faults itself by chance occurs in wind speed and direction sensor-based system two,
It then needs to determine icing possibility by other parameters according to one data of wind speed and direction sensor-based system, if but passing through acquisition wind speed
Two data of wind direction sensor-based system are acquired as normal wind speed, then in its failure and blade aerodynamic performance improves, are easy to cause knot
Ice is reported by mistake or is not reported, and will lead to unit availability at this time reduces or in ice carrying row, influence unit safety.
Preferably, wind speed and direction sensor-based system one uses mechanical wind speed and direction sensor-based system, wind speed and direction sensor-based system
Two use ultrasonic wind speed and direction sensor-based system, pass through mechanical wind speed and direction sensor-based system and ultrasonic wind speed and direction sensing system
System as determining in icing possibility, ultrasonic wind speed and direction sensor-based system be not present at low temperature icing may, and it is mechanical
Wind speed and direction sensor-based system is easy to happen icing possibility, can be used as good control sensor；On the other hand, to ultrasonic wave wind
Processing has also been made in the case of fast wind direction sensor-based system faults itself, in its failure, switches to mechanical wind speed and direction sensing system
System, still can effectively determine ice condition.
Preferably, the velocity-measuring system mainly acquires 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, acquires filtering wind speed and filtering rotary speed data and passes through wind speed
Inverse time lag module and revolving speed inverse time lag module carry out the judgement of icing mode trigger signal, wind speed of the determination method based on unit
And tach signal, and the flag bit of inverse time lag control is combined to give sentencing for unit icing possibility under different wind speed and tach signal
Fixed, this method not only can be determined that ice condition, but also can be determined that out unit normal operation and monitoring sensor event
Barrier determines that the formula that wind speed inverse time lag module and revolving speed inverse time lag module use is as follows:
It should be noted that TvIndicate that unit freezes delay one of them reference time of judgement；TωIndicate that unit icing is prolonged
When another reference time for determining；VactIndicate that unit actual wind speed filters wind speed, VrefIndicate that unit refers to wind speed threshold value；
ωactIndicate the practical filtering revolving speed of unit；ωrefIndicate unit reference rotation velocity threshold value；α indicates that wind speed inverse time-lag constant (can
Take 1.5~2.5)；β indicates revolving speed inverse time-lag constant (desirable 1~1.5)；M and n is constant, value 2.
Preferably, it when being determined according to wind speed inverse time lag module, is frozen by setting with reference to wind speed threshold value
The calculating of delay time and the judgement of flag bit 1, the rated wind speed of (85%~90%) are generally taken with reference to wind speed threshold value, in reality
When wind speed is less than with reference to wind speed, TvFor negative；Otherwise its value is that positive number passes through when being determined according to revolving speed inverse time lag module
Reference rotation velocity threshold value is set to carry out the calculating of icing delay time and the judgement of flag bit 2.Reference rotation velocity threshold value generally takes
The rated speed of (90%~95%), when actually turning to be less than reference rotation velocity, TωIt is otherwise positive number for negative.According to TvAnd Tω
Numerical value can give different flag bits, the subsequent judgement that icing mode and other modes are carried out according to flag bit.
It should be noted that in Vact=VrefOr ωact=ωrefWhen, it calculates and infinity occurs, therefore filter wind speed and turn
Speed needs to do numerical value and jumps, and avoids this referential data point.Generally when this kind of situation occurs, actual wind speed limitation is given
(95%~98%) Vref(95%~98%) ω is being limited in revolving speedref。
Preferably, unit triggers icing mode 2 under icing mode, at this time unit flag bit: Tv=TRUE, Tω=
TRUE, that is, wind speed is more than wind speed threshold value at this time and revolving speed is more than rotary speed threshold value.Can have two kinds of situations at this time: 1) unit is being just
Norm formula, blade is without icing；2) blade may freeze.For the possible ice condition of blade, need to determine whether power is more than to set
Determine PsetTo further determine ice condition.It is relatively low to compare normal power for the power of the assembling unit due to wind speed is larger at this time, at this time in order to protect
The complete machine for demonstrate,proving unit carries out safely stoppage protection movement and provides icing halt instruction.
Preferably, unit triggers icing mode 1 under icing mode, at this time unit be in rated wind speed and its more than hair
Electricity condition or the idling conditions that do not generate electricity.Pass through determination flag position T at this timev=TRUE, Tω=FALSE, i.e., in the larger feelings of wind speed
The revolving speed of unit is lower under condition, therefore, it is determined that unit is in icing condition.
Preferably, in unit flag bit Tv=FALSE, Tω=TRUE, unit is in small wind speed but generator speed at this time
Excessively high, general there are two types of may.One is anemobiagraph failure；Secondly being speed probe failure.General control group anemobiagraph tool
There is low-temperature resistance characteristic, its own simultaneous faults probability is lower, then can be confirmed as speed probe failure.It can be used as and turn at this time
The mode that fast sensor fault determines.
Preferably, in unit flag bit Tv=FALSE, Tω=FALSE, unit is in small wind speed and slow-speed of revolution feelings at this time
Condition will not jeopardize unit safety there is ice condition, therefore this situation is defaulted as unit safety operation situation.
Preferably, the control execution module is that the different icing modes given according to unit execute different operations.
When unit gives icing mode 1, if unit is in generating state normal operating condition is maintained and according to delay time Min
(Tv, Tω) provide icing warning；If unit is in non-power generating state, delay time Min (T is given at this timev, Tω) quote icing police
It accuses, by section θfine→θsetDynamic changes the propeller pitch angle of unit, remains dynamic after determining that simultaneously net operation may be implemented in unit
The propeller pitch angle of state setting.When unit gives icing mode 2, moved at this time in order to guarantee that the complete machine of unit carries out safely stoppage protection
Make and gives delay time Min (T to thisv, Tω) go out icing halt instruction.
Compared with the prior art, the advantages of the present invention are as follows:
Based on modes such as conventional cabin external environment monitoring temperature, wind speed-wind direction data acquisition, rotary speed data acquisitions, and
Enhance the accuracy of air speed data by two groups of wind speed and direction sensor-based systems of setting.By the determination module that freezes in main control PLC, adopt
With inverse time lag control method, the ice condition of turbines vane can be effectively determined.Wind has been fully considered in icing determination module
Three speed, revolving speed and power important parameters, and according to the knot of wind speed inverse time lag module and revolving speed inverse time lag module judgement unit
Ice mode, sensor fault and normal mode.Different icings is given according to icing mode and executes control, realizes unit knot
Ice operation freezes and shuts down the judgement of two ways.By above-mentioned control method, the reliability that unit icing determines is improved, and
And by giving different icing modes, improving the generated energy under unit icing condition 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) determined by being monitored to wind speed and direction sensor-based system faults itself, eliminate control sensor faults itself and cause
Icing wrong report so as to cause generated energy loss, the excessive feelings of bring unit fatigue load can not be monitored by equally eliminating icing
Condition is capable of the blade icing possibility of effective monitoring unit；
2) by using inverse time lag control mode, can be confirmed the icing possibility of unit, sensor fault form and
Unit normal operation mode, and it is accurate and reliable；
3) by the way that hair of the unit under ice condition can be improved to different control modes is executed under different icing modes
Electricity and availability, and guarantee that unit freezes the safety of operation under strong wind；
4) by inverse time lag control mode, time adjustment can be carried out for the ice condition of unit, improves the detection that freezes
Robustness and unit safety.
It is frozen by the wind generator set blade controlled based on the inverse time lag and detects control method, supervised according to environmental parameter
Control, the acquisition of associated sensor data and the setting of unit operating parameter execute the icing of unit by icing determination module
Determine and provides corresponding icing grade classification.By to icing grade analysis, execute corresponding propeller pitch angle operation control or
Unit safety shutdown operation.This method can accurate detection blower fan blade ice condition, detection is accurate, high reliablity,
It is at low cost；And can control the icing operation of unit and safe shutdown operation under basic full blast speed section, improve unit can benefit
With rate and safety.
Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Attached drawing 1 is this patent general system set-up block diagram；
Attached drawing 2 is that this patent wind speed and direction sensor-based system detects process decision chart；
Attached 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.
Specific 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
Environmental parameter monitoring, the acquisition of associated sensor data and the setting of unit operating parameter, are executed by icing determination module 2
The icing of unit determines and provides corresponding icing grade classification.By executing corresponding propeller pitch angle fortune to icing grade analysis
Row control or unit safety shutdown operation.This method can accurate detection blower fan blade ice condition, detection is accurate,
It is high reliablity, at low cost；And can control the icing operation of unit and safe shutdown operation under basic full blast speed section, improve machine
The availability and safety of group.
It is attached below with reference to the correlation of the embodiment of the present invention to keep purpose, the technical solution of the embodiment of the present invention clearer
Figure, completely describes the embodiment of the present invention.The embodiment of this patent description is a part of the embodiment, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Specific embodiment
Attached drawing 1 is a kind of wind generator set blade icing detection controlling party based on inverse time lag control provided by the invention
The system block diagram of method is embodied as follows:
Attached drawing 1 gives the whole flow process block diagram of unit icing detection control method, a kind of wind based on inverse time lag control
Power generator blade, which freezes, detects control method, characterized by comprising:
The icing detecting and controlling system specifically include that environmental monitoring system, temperature sensor 1, wind speed and direction sensor-based system,
Velocity-measuring system, icing determination module 2 and control execution module 3,1 monitoring machine freight space of temperature sensor in the environmental monitoring system
Set place's ambient temperature data；Wind speed and direction sensor-based system monitor wind speed and wind direction data situation of change and sensor is made from dieing
Barrier monitoring；Wind speed and direction sensor-based system includes air velocity transducer 4 and wind transducer 5, and air velocity transducer 4 monitors the impeller of unit
Revolving speed and generator speed；Icing determination module 2 to filtering air speed data collected and filtering rotary speed data carry out processing and
Analysis, by respective inverse time lag control module carry out flag bit judgement and numerical value judgement, by flag bit determine to
Unit icing determines out, sensor fault determines and unit operates normally judgement etc.；Execution module 3 is controlled predominantly to unit
The processing and operation of ice condition control.
The environmental monitoring system, it is main comprising carrying 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 greater than 0, sentence without ice-formation condition
It is fixed；When environment temperature is less than 0, then as one of ice-formation condition judgement input condition.
After meeting icing decision condition to environment temperature, wind speed and direction sensor-based system data are determined, wind speed and direction
Sensor-based system includes wind speed and direction sensor-based system one and wind speed and direction sensor-based system two, according to control wind speed and direction sensor-based system
One and wind speed and direction sensor-based system two as unit icing standard is determined, but its own fault condition is not analyzed, then may be used
Wind speed and direction sensor-based system one can occur and exist to freeze, and by chance there is faults itself in wind speed and direction sensor-based system two, at this time two
Person's data comparison is easy to appear the practical icing of unit but master control detection is not reported, and causes unit in ice carrying row, influences unit safety,
Wind speed and direction sensor-based system one uses mechanical wind speed and direction sensor-based system, and wind speed and direction sensor-based system two uses ultrasonic wind speed
Wind direction sensor-based system, being frozen by mechanical wind speed and direction sensor-based system and ultrasonic wind speed and direction sensor-based system as judgement can
In energy property, icing possibility is determined being used as using mechanical wind speed and direction sensor-based system and ultrasonic wind speed and direction sensor-based system
In, it is possible that icing is not present in ultrasonic wind speed and direction sensor-based system at low temperature, and mechanical wind speed and direction sensor-based system is easy
Occur to freeze possible, can be used as good control sensor；On the other hand, it dies certainly to ultrasonic wind speed and direction sensor-based system
Processing has also been made in the case of barrier, still ice condition can effectively be determined.
Velocity-measuring system mainly acquires the wheel speed and generator speed data of unit, as the acquisition monitoring of unit data
Data input.
The icing determination module 2, which is mainly realized, to be acquired filtering wind speed and filtering rotary speed data and passes through the wind speed inverse time lag
Module and revolving speed inverse time lag module carry out the judgement of icing mode trigger signal.Wind speed and revolving speed of the determination method based on unit
Signal, and the flag bit for combining the inverse time lag to control gives the judgement of unit icing possibility under different wind speed and tach signal.It should
Method not only can be determined that ice condition, but also 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 revolving speed inverse time lag module use is as follows:
Specifically, TvIndicate that unit freezes delay one of them reference time of judgement；TωIt indicates that unit freezes to be delayed to determine
Another reference time；VactIndicate that unit actual wind speed filters wind speed, VrefIndicate that unit refers to wind speed threshold value；ωactIt indicates
The practical filtering revolving speed of unit；ωrefIndicate unit reference rotation velocity threshold value；α expression wind speed inverse time-lag constant (desirable 1.5~
2.5)；β indicates revolving speed inverse time-lag constant (desirable 1~1.5)；M and n is constant, value 2.
Specifically, being frozen when being determined according to wind speed inverse time lag module by setting with reference to wind speed threshold value
The calculating of delay time and the judgement of flag bit 1.The rated wind speed that (85%~90%) is generally taken with reference to wind speed threshold value, in reality
When wind speed is less than with reference to wind speed, TvFor negative；Otherwise its value is positive number.When being determined according to revolving speed inverse time lag module, pass through
Reference rotation velocity threshold value is set to carry out the calculating of icing delay time and the judgement of flag bit 2.Reference rotation velocity threshold value generally takes
The rated speed of (90%~95%), when actually turning to be less than reference rotation velocity, TωIt is otherwise positive number for negative.According to TvAnd Tω
Numerical value can give different flag bits, the subsequent judgement that icing mode and other modes are carried out according to flag bit.
It should be noted that in Vact=VrefOr ωact=ωrefWhen, it calculates and infinity occurs, therefore filter wind speed and turn
Speed needs to do numerical value and jumps, and avoids this referential data point.Generally when this kind of situation occurs, actual wind speed limitation is given
(95%~98%) Vref(95%~98%) ω is being limited in revolving speedref。
Preferably, unit triggers unit under icing mode and gives icing mode 2, at this time unit flag bit: Tv=TRUE,
Tω=TRUE.Namely wind speed is more than wind speed threshold value at this time and revolving speed is more than wind speed threshold value.There can be two kinds of situations: 1) machine at this time
Group normal mode, blade is without icing；2) blade may freeze.For the possible ice condition of blade, need to determine whether power surpasses
Cross setting PsetTo further determine ice condition.In order to guarantee unit strong wind icing safety in operation, need to determine the upper of unit
The size of net magnitude of power and theoretical power (horse-power) value, 0.8Pset≤Pact≤0.9Pset, PsetFor theoretical power (horse-power) value, PactIndicate unit
Online performance number；Determining that meeting wind speed inverse time lag flag bit and revolving speed inverse time lag flag bit in two flag bits of judgement is all
When TRUE and 0.8Pset≤Pact≤0.9PsetSafe shutdown under unit ice-formation condition is executed by execution module when condition to grasp
Make.Power is lower due to wind speed at this time is larger, at this time in order to guarantee that the complete machine of unit carries out safely stoppage protection movement and provides
Icing halt instruction.
Preferably, unit triggered under icing mode unit give icing mode 1, at this time unit be in rated wind speed and its
Above generating state or the idling conditions that do not generate electricity.Pass through determination flag position T at this timev=TRUE, Tω=FALSE, i.e., in wind
The revolving speed of unit is lower in the larger situation of speed, therefore, it is determined that unit is in icing condition.
Preferably, in unit flag bit Tv=FALSE, Tω=TRUE, unit is in small wind speed but generator speed at this time
Excessively high, general there are two types of may.One is anemobiagraph failure；Secondly being 6 failure of speed probe.General control group anemobiagraph tool
There is low-temperature resistance characteristic, its own simultaneous faults probability is lower, then can be confirmed as 6 failure of speed probe.It can be used as at this time
One mode of 6 fault verification of speed probe.
Preferably, in unit flag bit Tv=FALSE, Tω=FALSE, unit is in small wind speed and slow-speed of revolution feelings at this time
Condition will not jeopardize unit safety there is ice condition, therefore this situation is defaulted as unit safety operation situation.
The control execution module 3 is that the different icing modes given according to unit execute different operations.In unit
When given icing mode 1, normal operating condition is maintained if unit is in generating state and according to delay time Min (Tv, Tω)
Provide icing warning；If unit is in non-power generating state, delay time Min (T is given at this timev, Tω) icing warning is quoted, pass through
In section θfine→θsetDynamic changes the propeller pitch angle of unit, θfine→θsetRefer to section θfineIt is adjusted to θsetDynamic changes unit
Propeller pitch angle, θfineIndicate the optimal propeller pitch angle of unit, θsetIndicate that unit sets target pitch angle when freezing；In deteminate machine
Group may be implemented and maintain the propeller pitch angle of dynamic setting after net operation.When unit gives icing mode 2, at this time in order to guarantee machine
The complete machine of group carries out safely stoppage protection movement and gives delay time Min (T to thisv, Tω) go out icing halt instruction.
Finally, it should be noted that the above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations；Reference
Invention is explained in detail for previous embodiment, those skilled in the art should understand that: to previous embodiment
The modification of technical solution is equivalently replaced part of or all technical features, these modifications are still in the present invention
The technical reform scheme range of embodiment.
The present invention is not limited to the above-described embodiments, anyone should learn make under the inspiration of the present invention with the present invention
With same or similar technical solution, fall within the scope of protection of the present invention.
Technology not described in detail in the present invention, shape, construction portion are well-known technique.
Claims (4)
- A kind of detection control method 1. wind power generating set based on inverse time lag control freezes, wherein icing detecting and controlling system It include: environmental monitoring system, velocity-measuring system, icing determination module and control execution module, it is characterised in that；It is detected freezing In, whether detection environmental condition first meets ice-formation condition, monitors nacelle position by temperature sensor in environmental monitoring system Locate ambient temperature data, an enabled item according to temperature data situation of change as logic decision in unit icing detection module Part；After environmental condition meets, for wind speed and direction sensor-based system monitor wind speed and wind direction data situation of change, and according to data Situation of change does the monitoring of sensor faults itself in master control, for realizing the switching of non-faulting wind speed and direction sensor-based system, really It is accurate and reliable to protect the data that master control detection is read；For velocity-measuring system, by close open of testing the speed at main shaft and at generator The reading data of pass measures the wheel speed and generator speed of unit；By above-mentioned measurement data and determine that result gives master control Middle icing determination module, the module to filtering air speed data collected and filtering rotary speed data via wind speed inverse time lag module with And revolving speed inverse time lag module carries out the judgement of flag bit and the judgement of numerical value, by determining disparate modules flag bit combinational logic Provide unit icing judgement, sensor fault determines and unit normal operation determines that the icing determination module includes wind speed Inverse time lag module and revolving speed inverse time lag module, in the wind speed inverse time lag module with reference to wind speed threshold value be 85%~90% it is specified Air speed value；Boolean denotation position T is determined according to filtering air speed valuevSituation of change, be TRUE or FALSE according to it, Tv> 0 mark Position is TRUE, Tv< 0 flag bit is FALSE, and the judgement of icing index position is carried out in conjunction with revolving speed inverse time lag module, and the revolving speed is anti- The rated speed that reference rotation velocity threshold value is 90%~95% in time limit module；Boolean denotation position T is determined according to filtering tachometer valueω's Situation of change is TRUE or FALSE according to it, Tω> 0 flag bit is TRUE, Tω< 0 flag bit is FALSE, anti-in conjunction with wind speed Time limit module carries out the judgement of icing index position,The formula that wind speed inverse time lag module and revolving speed inverse time lag module use is as follows:Specifically, TvIndicate that unit freezes delay one of them reference time of judgement；TωIt is another to indicate that unit icing delay determines A reference time；VactIndicate that unit actual wind speed filters wind speed, VrefIndicate that unit refers to wind speed threshold value；ωactIndicate that unit is real Border filters revolving speed；ωrefIndicate unit reference rotation velocity threshold value；α indicates wind speed inverse time-lag constant, takes 1.5~2.5；β is indicated Revolving speed inverse time-lag constant, takes 1~1.5；M and n is constant, value 2.
- The detection control method 2. a kind of wind power generating set based on inverse time lag control according to claim 1 freezes, Be characterized in: the rated speed of the inverse time lag module setting 95%~98% is to avoid speed dead bend；To wind speed inverse time lag mould In block, the rated wind speed of setting 95%~98% is to avoid wind speed dead zone.
- The detection control method 3. a kind of wind power generating set based on inverse time lag control according to claim 1 freezes, Be characterized in: the wind speed inverse time lag flag bit and revolving speed inverse time lag flag bit are when determining two flag bits is all TRUE, i.e. wind When fast inverse time lag module detects that actual wind speed is greater than reference threshold wind speed and generator speed is greater than reference threshold revolving speed, determine The size of the online magnitude of power and theoretical power (horse-power) value of unit, 0.8Pset≤Pact≤0.9Pset, PsetFor theoretical power (horse-power) value, Pact Indicate unit online performance number；Determining that meeting wind speed inverse time lag flag bit and revolving speed inverse time lag flag bit is determining two marks Position all be TRUE when and 0.8Pset≤Pact≤0.9PsetSafe stopping under unit ice-formation condition is executed by execution module when condition Machine operation.
- The detection control method 4. a kind of wind power generating set based on inverse time lag control according to claim 1 or 3 freezes, It is characterized in that: the execution module executes different operations according to the different icing modes that unit gives, in the given knot of unit When ice mode 1, at this time unit be in rated wind speed and its more than generating state or the idling conditions that do not generate electricity, at this time by sentencing Determine flag bit Tv=TRUE, Tω=FALSE, i.e., the revolving speed of unit is lower in the larger situation of wind speed, therefore, it is determined that unit is in Icing condition；Normal operating condition is maintained if unit is in generating state and according to delay time Min (Tv, Tω) provide icing Warning；If unit is in non-power generating state, delay time Min (T is given at this timev, Tω) icing warning is quoted, by section θfine→θsetDynamic changes the propeller pitch angle of unit, θfine→θsetRefer to from θfineIt is adjusted to θsetDynamic changes the pitch of unit Angle, θfineIndicate the optimal propeller pitch angle of unit, θsetIndicate that unit sets target pitch angle when freezing；Determining that unit can be with The propeller pitch angle for realizing and maintaining after net operation dynamic setting, when unit gives icing mode 2, unit flag bit at this time: Tv= TRUE, Tω=TRUE, that is, wind speed is more than wind speed threshold value at this time and revolving speed is more than rotary speed threshold value；At this time in order to guarantee unit Complete machine carries out safely stoppage protection movement, and is meeting given delay time Min (Tv, Tω) when, execute icing halt instruction.
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| CN109407631B (en) * | 2018-09-29 | 2020-09-22 | 珠海格力电器股份有限公司 | Processing method, device, unit and storage medium for input load information |
| CN109540334A (en) * | 2018-12-19 | 2019-03-29 | 河北涿州京源热电有限责任公司 | The method for early warning of generator overheating potential faults based on three-dimensional display |
| CN111075661B (en) * | 2019-12-25 | 2021-11-09 | 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 |
| CN111852793A (en) * | 2020-07-30 | 2020-10-30 | 湖南拓天节能控制技术股份有限公司 | Method and device for combined control of fan starting and blade deicing prevention |
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| CN103835879B (en) * | 2014-02-11 | 2017-04-12 | 南京南瑞继保电气有限公司 | Draught fan yaw start discriminating method based on inverse time limit |
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