CN114000989B - Wind generating set blade aerodynamic performance attenuation detection method and test system - Google Patents
Wind generating set blade aerodynamic performance attenuation detection method and test system Download PDFInfo
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- 238000002474 experimental method Methods 0.000 claims abstract description 38
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- 239000003973 paint Substances 0.000 claims description 127
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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
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/83—Testing, e.g. methods, components or tools therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/84—Modelling or simulation
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- 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
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- 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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Abstract
The invention relates to the field of pneumatic performance detection of blades of a wind generating set, in particular to a method and a system for detecting the pneumatic performance attenuation of the blades of the wind generating set. The design and research process of the method is clear and definite, the experiment implementation link is easy to monitor and measure, the data analysis link is easy to carry out statistical processing, and the period and the cost of the blade aerodynamic performance attenuation detection work can be effectively reduced.
Description
Technical Field
The invention relates to the field of pneumatic performance detection of blades of a wind generating set, in particular to a method and a system for detecting pneumatic performance attenuation of blades of a wind generating set.
Background
After the hoisting work of the wind generating set is completed, the wind generating set enters an operation debugging link, a complete machine manufacturer technician adjusts a control strategy according to site specific conditions, and a power curve test proves that the operation power curve of the wind generating set meets the technical protocol requirements, so that delivery acceptance conditions are met. However, as the length of service increases, the unit power curve tends to decrease, for reasons that may include: the pitch test system responds to speed deviations, yaw test system to wind angle deviations, blade aerodynamic profile changes, blade paint damage, and the like.
Wherein, the deflection or faults of the pitch test system and the yaw test system are common, the data record statistics analysis of the SCADA test system of the unit finds that the calibration or maintenance is carried out in the regular operation and maintenance process, so that the problem can be solved; blade icing often occurs in low-temperature and high-humidity areas, so that the aerodynamic shape of the blade is obviously changed, various ice preventing and removing devices or testing systems are developed, and the problems can be alleviated; the damage of the blade structure is difficult to avoid in the running process, the aerodynamic shape change of the blade or even the safety risk of a machine set can be caused according to the severity of the blade, and hidden danger can be eliminated by timely repair or replacement through irregular inspection or image monitoring discovery; under various environmental conditions, dirt, erosion and corrosion of the blade can occur and have various characteristics, so that the surface roughness of the blade is changed, further, the paint layer is damaged, the aerodynamic performance of the blade is lost to different degrees, no special and timely effective solution exists at present, and the blade can be relieved only by means of regular maintenance.
On one hand, the influence factors of the generating efficiency of the unit are numerous, the change of the aerodynamic performance of the blade cannot be directly estimated through the data of the SCADA test system of the unit, the error of drawing the running power curve of the unit by utilizing the data of the SCADA test system of the unit is large, the running power curve of the unit cannot reflect the change of the aerodynamic performance of the blade in time, however, the cycle of the running power curve of the unit needs three months and has high cost, and the method is not suitable for monitoring and working; on the one hand, the regions of China are wide, the regions with development potential of wind energy resources are distributed throughout the north and south, the characteristics of different natural environments are different, the influence on damage of the paint layers of the blades is also different, and the technical risk difference of adopting unified and regular maintenance to carry out requirements is large; on the one hand, the influence degree of the damage of the paint layer on the generating capacity of the unit is not accurately estimated, the operation and maintenance cost of the unit continuously fluctuates along with the supply and demand conditions of the market, and the economic balance point is difficult to determine so as to formulate the working period and the plan of monitoring and operation and maintenance. How to build a wind generating set blade aerodynamic performance attenuation detection test system, and seek a common effective wind generating set blade aerodynamic performance attenuation detection method, which is suitable for various wind power plant natural environments and blade types, and plays a role in capturing blade aerodynamic performance attenuation caused by damage of a blade paint layer, reasonably evaluating operation and maintenance generating capacity improvement benefits and construction cost, and the test system improves the whole life cycle benefits of the wind generating set.
Disclosure of Invention
Aiming at the complex problems existing in the prior art, the invention provides a method for detecting the pneumatic performance attenuation of a blade of a wind generating set and a test system.
The invention is realized by the following technical scheme:
a method for detecting the aerodynamic performance attenuation of a blade of a wind generating set comprises the following steps:
step 1) constructing an environment damage typical experimental link: obtaining a typical environmental condition model and a typical experimental condition model;
step 2) constructing a front paint damage-resistance coefficient database link: taking a typical environmental condition model as a reference, performing an accelerated environmental damage experiment on the airfoil experimental member to form an airfoil experimental member front edge paint layer damage with typical environmental condition characteristics;
measuring airfoil test lift resistance data after the front paint layer is damaged through an aerodynamic test;
combining the accelerated environmental damage experimental time serving as a corresponding parameter to obtain a front paint damage-liter resistance coefficient function relation curve, and accumulating to form a front paint damage-liter resistance coefficient database;
step 3) analyzing the blade aerodynamic performance attenuation condition link: and calculating the lifting resistance coefficient data after the damage of the front edge paint layer by measuring the damage of the front edge paint layer of the blade by using the front edge paint layer damage-lifting resistance coefficient database, carrying out numerical simulation on the normal power generation operation condition of the wind generating set, and analyzing to obtain the aerodynamic performance attenuation condition of the blade of the wind generating set.
Preferably, in step 1), the process of establishing the typical environmental condition model is as follows: the environmental resource information of the regional gas stations is collected and arranged, the composition and characteristic parameters of the damage factors of the wind turbine generator system blade environment of the wind power plant in each region are obtained through analysis, a typical environmental condition model is formed, and the typical environmental condition model is recorded as a typical environmental conditionWherein the subscript i indicates the typical environmental situation model number.
Preferably, the blade environmental damage factor is one or a combination of a plurality of rain erosion, corrosion and aging.
Preferably, in step 1), the building process of the typical experimental condition model is as follows: by carrying out numerical simulation on wind resources of a wind power plant, typical parameters of normal power generation operation conditions of wind generating sets of various numbers are obtained through analysis, and each position of the blades in the extending mode is calculated by combining the torsion angle distribution of the bladesEquivalent inflow angle function corresponding to section airfoil>And equivalent incoming flow velocity function->The method comprises the steps of carrying out a first treatment on the surface of the And calculating the equivalent inflow angle corresponding to the airfoil experimental part>And equivalent incoming flow speed->A typical experimental condition model is formed, wherein the subscript j represents a typical experimental condition model number.
Preferably, the airfoil experimental part is designed according to the scaling of airfoil models of aerodynamic efficiency output sections of various types of blades, and is marked as a typical airfoil model。
Preferably, the equivalent inflow angleAnd equivalent incoming flow speed->Is calculated by adopting the dimension principle in combination with the airfoil experimental piece.
Preferably, in step 2), the following steps are included:
(21) For typical airfoil modelsIn typical environmental conditions->On the basis of the environmental damage factors, carrying out accelerated environmental damage experiment work;
monitoring a typical airfoil modelContinuously recording the intersecting arc length of the damaged area of the front paint layer and the spanwise cross section>It is combined with a typical airfoil model>Chord length->The ratio of (2) is defined as the characteristic of damage to the paint layer at the front edge>The expression is:
wherein,,the accelerated environmental injury experiment time is represented;
(22) Current paint damage characteristic parameter incrementWhen the minimum resolution value of the experimental measurement is reached, the typical airfoil model after the damage of the front paint layer is +.>Under the condition of meeting the corresponding typical experimental conditions, carrying out aerodynamic experimental work;
the expression of the damage characteristic parameter increment of the front paint layer is as follows:
measuring the lift resistance and converting to obtain lift coefficientAnd resistance coefficient->Wherein->The accelerated environmental injury experiment time is represented;
matching the same accelerated environmental injury test timeThe damage characteristic parameters, lift coefficient and resistance coefficient of the front paint layer at the moment form a corresponding relation and are recorded as data points +.>；
(23) Repeating the steps (21) and (22) to obtain a series of data pointsCombining to obtain a typical airfoil model->In typical environmental conditions->Leading edge paint damage-lift coefficient curve under conditions:
and a leading edge paint damage-resistance coefficient curve:
；
(24) Traversing typical environmental conditionsTraversing typical airfoil models->And obtaining a database of damage-liter resistance coefficients of the front paint layer.
Preferably, in step 3), the following steps are included:
(31) Detecting damage characteristic parameters of paint layer at front edge of blade of wind generating setThe expression is:
wherein,,indicating the position of the blade in the spanwise direction->Indicating the intersection arc length of the damaged area of the front paint layer and the spanwise cross section,representing the chord length of the section in the spanwise direction;
(32) Judging the typical environment condition of the wind farm according to the environmental resource information of the wind farmThe method comprises the steps of carrying out a first treatment on the surface of the Judging the typical airfoil model of the wind generating set according to the aerodynamic shape information of the blade>The method comprises the steps of carrying out a first treatment on the surface of the In the front paint damage-lift coefficient database, a corresponding front paint damage-lift coefficient curve is found:
and a leading edge paint damage-resistance coefficient curve:
；
combining blade front edge paint layer damage characteristic parametersThe detection result is that the rising resistance coefficient data after the damage of the paint layer at the front edge of the wind generating set blade operated by the wind power plant is obtained by a data linear interpolation method, namely +.>And；
(33) Numerical simulation of normal power generation operation conditions of the wind generating set is carried out, an original set power curve is corrected, annual energy generation quantity attenuation data of the set are calculated, and the pneumatic performance attenuation conditions of blades of the wind generating set are obtained; and if the annual energy production decay data of the unit exceeds the technical requirement threshold, repairing the damage of the paint layer at the front edge of the blade.
Preferably, the damage characteristic parameter of the paint layer at the front edge of the blade of the wind generating setTaking the average value of the corresponding results of the blades matched with the same wind generating set +.>Where k represents the blade number.
A wind turbine generator system blade aerodynamic performance decay test system, comprising:
the environment damage experiment acquisition module is used for constructing an environment damage typical experiment and comprises a typical environment condition model and a typical experiment condition model;
the blade aerodynamic performance function relation acquisition module is used for constructing a front paint damage-lift resistance coefficient database; forming a front paint layer damage of the airfoil experimental part by using a typical environment condition model and a typical experimental condition model, measuring airfoil experimental part lifting resistance data after the front paint layer damage, combining to obtain a front paint layer damage-lifting resistance coefficient function relation curve, and accumulating to form a front paint layer damage-lifting resistance coefficient database;
the blade aerodynamic performance attenuation condition acquisition module is used for evaluating the aerodynamic performance attenuation condition of the blade of the wind generating set; and calculating the lifting resistance coefficient data after the damage of the front edge paint layer by measuring the damage of the front edge paint layer of the blade by using the front edge paint layer damage-lifting resistance coefficient database, carrying out numerical simulation on the normal power generation operation condition of the wind generating set, and analyzing to obtain the aerodynamic performance attenuation condition of the blade of the wind generating set.
Compared with the prior art, the invention has the following beneficial effects:
according to the method for detecting the aerodynamic performance attenuation of the wind generating set blade, disclosed by the invention, the design links and the experimental links are reasonably integrated, so that the effect of evaluating the aerodynamic performance attenuation condition of the blade caused by damage of the paint layer of the blade in detail can be achieved, and a foundation is laid for the establishment of the operation and maintenance working cycle and the plan of the wind generating set. The design and research process of the method is clear and definite, the experiment implementation link is easy to monitor and measure, the data analysis link is easy to carry out statistical processing, and the period and the cost of the blade aerodynamic performance attenuation detection work can be effectively reduced.
According to the invention, the characteristics and rules of the environmental damage condition of the front paint layer of the wind generating set blade are utilized, the data result of an accelerated environmental damage experiment and an aerodynamic experiment is combined, and the data relation between the front paint layer damage and the lift resistance coefficient is established; by detecting damage characteristic parameters of the front edge paint layer of the blade and analyzing lifting resistance coefficient data after the front edge paint layer is damaged, the pneumatic performance attenuation condition of the blade of the wind generating set is defined, technical support is provided for technical improvement application of the wind generating set, and a complete wind generating set blade pneumatic performance attenuation detection method is formed.
The method effectively aims at the characteristics and rules of the environmental damage condition of the front paint layer of the wind generating set blade, combines the data results of the accelerated environmental damage experiment and the aerodynamic experiment, establishes the data relationship of the damage-lift resistance coefficient of the front paint layer, and provides possibility for directly evaluating the aerodynamic performance attenuation condition of the wind generating set blade.
According to the method, an accelerated environmental damage experiment is effectively introduced, the influence of the actual running environment of the wind generating set on the environmental damage of the front paint layer of the blade is simulated, the characteristics and the authenticity of the environmental damage of the front paint layer under the corresponding environmental conditions are reserved, and the period and the cost of the environmental damage experiment of the front paint layer of the blade are reduced.
According to the invention, the dimension principle is effectively introduced, the airfoil experimental piece is designed, corresponding experimental conditions are calculated, the actual running flow field environment of the airfoil after the damage of the paint layer environment of the front edge of the blade is simulated, the authenticity of aerodynamic performance data measurement is ensured, and the site requirement and cost of aerodynamic experiments are reduced.
The invention effectively integrates the data of different areas, different wind power generator sets and different blades, realizes sharing of typical experimental condition models by information screening and classification processing and by using dimension principles, reduces the number of experimental parts in experimental test links, reduces the period and cost for establishing database information data, and reflects the advantages of test system establishment and data call.
The invention can form a front paint damage-resistance-rise coefficient database, establishes the corresponding relation between the damage of the front paint of the blade and the resistance-rise coefficient under different typical environment conditions of different typical experimental condition models, is beneficial to researching an aerofoil aerodynamic numerical analysis method, in particular to an aerofoil boundary layer speed profile model selection method under the condition of the damage of the front paint, and establishes a more complete numerical simulation method system.
According to the invention, the lift resistance coefficient of the wing profile can be obtained through an aerodynamic experiment, and the annual energy production decay data of the wind power generation set can be calculated by combining the numerical simulation of the running condition of the wind power generation set and the wind resource condition of the wind power plant, so that the aerodynamic performance decay condition of the wind power generation set blade can be truly and effectively estimated.
According to the invention, the numerical error introduced by measurement activities can be reduced by measuring the average damage condition of the paint layer at the front edge of the matched blade of the same wind generating set; the method is flexibly applied by combining the design ideas, the unit detection analysis works corresponding to the same typical environment conditions and the same typical experimental condition models are combined, the representative unit is selected to carry out limited times of measurement, representative measurement data are further screened to carry out analysis comparison, the effect of simultaneously monitoring the batch units is achieved, and the period and cost of the data monitoring work are reduced.
According to the invention, experimental design, experimental test and detection analysis are effectively combined, the high efficiency of a test system on data integration is utilized, the authenticity and reliability of process data and result data are improved, the pneumatic performance attenuation condition of the wind turbine generator set blade is cooperatively defined from the aspects of design, test, analysis and application, technical support is provided for the technical improvement application of the wind turbine generator set, and a complete wind turbine generator set blade pneumatic performance attenuation detection method is formed.
The pneumatic performance attenuation test system for the wind generating set blade effectively realizes the pneumatic performance attenuation detection work of the wind generating set blade, and comprises the steps of design, test and analysis, so that a complete set of pneumatic performance attenuation detection method for the wind generating set blade is formed.
Drawings
FIG. 1 is a schematic block diagram of a method for detecting aerodynamic performance decay of a wind turbine blade according to the present invention.
Detailed Description
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
The invention discloses a method for detecting the aerodynamic performance attenuation of a blade of a wind generating set, which comprises the following steps:
step 1) constructing an environment damage typical experimental link:
and constructing an environment damage typical experiment, wherein the environment damage typical experiment comprises the step of obtaining a typical environment condition model and a typical experiment condition model.
The building process of the typical environmental condition model is as follows: the method comprises the steps of collecting and sorting environmental resource information of each regional gas image station, analyzing the environmental damage factor composition and characteristic parameters of blades of a wind turbine generator system of a wind farm in each region, and forming a typical environmental condition model; the environmental damage factor of the blade is one or the combination of a plurality of rain erosion, corrosion and aging; is marked as a typical environmental conditionWherein the subscript i represents a typical environmental situation model number;
the typical experimental condition model is established by the following steps: the typical parameters of the normal power generation operation conditions of various wind generating sets are obtained through analysis by carrying out numerical simulation on wind resources of a wind power plant, wherein the typical parameters comprise the incoming wind speed of the sets, the pitch angle of blades and the rated rotation speed, and the positions of the blades in each extending mode are calculated by combining the torsion angle distribution of the bladesEquivalent inflow angle function corresponding to section airfoil>And equivalent incoming flow velocity function->；
By the dimension principle and combining with the airfoil experimental part, the equivalent inflow angle corresponding to the airfoil experimental part is calculatedAnd equivalent incoming flow speed->A typical experimental condition model is formed, wherein the subscript j represents a typical experimental condition model number.
The airfoil experimental part is designed according to the scaling of airfoil models of aerodynamic efficiency output sections of various types of blades and is marked as a typical airfoil model。
Step 2) constructing a front paint damage-resistance coefficient database link:
taking a typical environmental condition model as a reference, performing an accelerated environmental damage experiment on the airfoil experimental member to form an airfoil experimental member front edge paint layer damage with typical environmental condition characteristics;
measuring airfoil test lift resistance data after the front paint layer is damaged through an aerodynamic test;
and combining the accelerated environmental damage experimental time serving as a corresponding parameter to obtain a front paint damage-liter resistance coefficient function relation curve, and accumulating to form a front paint damage-liter resistance coefficient database. The method specifically comprises the following steps:
(21) Model a typical airfoilIs installed in an environmental experiment box, in the typical environmental situation +.>On the basis of the environmental damage factors, the characteristic parameter values of the environmental damage factors are proportionally improved, and the accelerated environmental damage experiment work is carried out;
monitoring a typical airfoil modelContinuously recording the intersecting arc length of the damaged area of the front paint layer and the spanwise cross section>It is combined with a typical airfoil model>Chord length->The ratio of (2) is defined as the characteristic of damage to the paint layer at the front edge>The expression is:
wherein,,the accelerated environmental injury experiment time is represented;
(22) Current paint damage characteristic parameter incrementWhen the minimum resolution value of experimental measurement is reached, a typical airfoil model after the front paint layer is damaged is +.>Is installed in an aerodynamic wind tunnel, the corresponding equivalent inflow angle calculated in satisfying the corresponding typical experimental conditions (i.e. step 1)>And equivalent incoming flow speed->) Carrying out aerodynamic experiment work;
the expression of the damage characteristic parameter increment of the front paint layer is as follows:
measuring the lift resistance and converting to obtain lift coefficientAnd resistance coefficient->Wherein->The accelerated environmental injury experiment time is represented;
matching the same accelerated environmental injury test timeThe damage characteristic parameters, lift coefficient and resistance coefficient of the front paint layer at the moment form a corresponding relation and are recorded as data points +.>；
(23) Repeating the steps (21) and (22) to obtain a series of data pointsCombining to obtain a typical airfoil model->In typical environmental conditions->Leading edge paint damage-lift coefficient curve under conditions:
and a leading edge paint damage-resistance coefficient curve:
；
(24) Traversing typical environmental conditionsTraversing typical airfoil models->Obtaining a front paint damage-liter resistance coefficient database;
step 3) analyzing the blade aerodynamic performance attenuation condition link:
and calculating the lifting resistance coefficient data after the front edge paint layer is damaged by measuring the damage characteristic parameters of the front edge paint layer of the blade by utilizing the front edge paint layer damage-lifting resistance coefficient database, carrying out numerical simulation on the normal power generation operation condition of the wind generating set, and analyzing to obtain the aerodynamic performance attenuation condition of the blade of the wind generating set. The method specifically comprises the following steps:
(31) For a wind generating set operated by a wind farm, periodically detecting damage characteristic parameters of a paint layer at the front edge of a blade of the wind generating setI.e. the arc length of the front edge paint layer at the intersection of the damaged area and the spanwise cross section +.>And the chord length of the section in the spanwise direction>Is expressed as:
wherein,,the blade unfolding position is represented, and the lower corner mark k represents the blade serial number;
damage characteristic parameters for front edge paint layer of wind generating set bladeTaking the average value of the corresponding results of the blades matched with the same wind generating set +.>The influence of measurement errors can be reduced.
(32) Judging the typical environment condition of the wind farm according to the environmental resource information of the wind farmThe method comprises the steps of carrying out a first treatment on the surface of the Judging the typical airfoil model of the wind generating set according to the aerodynamic shape information of the blade>The method comprises the steps of carrying out a first treatment on the surface of the Finding the corresponding front paint damage in the front paint damage-liter resistance coefficient databaseWound-lift coefficient curve:
and a leading edge paint damage-resistance coefficient curve:
；
combining with the detection result of the damage characteristic parameter of the paint layer at the front edge of the bladeThe data of the rising resistance coefficient after the damage of the paint layer at the front edge of the blade of the wind generating set operated by the wind power plant is obtained by a data linear interpolation method, namely +.>And。
(33) Numerical simulation of normal power generation operation conditions of the wind generating set is carried out, an original set power curve is corrected, annual energy generation decay data of the set are calculated by combining wind resource conditions of the wind power plant, and the pneumatic performance decay conditions of blades of the wind generating set are obtained; if annual energy production decay data of the unit exceeds a technical requirement threshold, repairing damage of a paint layer at the front edge of the blade; otherwise, the damage of the paint layer at the front edge of the blade is not required to be repaired, and the machine set is accepted to continue to operate.
The method for detecting the aerodynamic performance attenuation of the wind generating set blade utilizes the characteristics and rules of the environmental damage condition of the front paint layer of the wind generating set blade, combines the data results of an accelerated environmental damage experiment and an aerodynamic experiment, and establishes the data relation of the damage-resistance coefficient of the front paint layer; by detecting damage characteristic parameters of the front edge paint layer of the blade and analyzing lifting resistance coefficient data after the front edge paint layer is damaged, the pneumatic performance attenuation condition of the blade of the wind generating set is defined, technical support is provided for technical improvement application of the wind generating set, and a complete wind generating set blade pneumatic performance attenuation detection method is formed.
The invention discloses a wind generating set blade aerodynamic performance attenuation test system, which comprises:
the environment damage experiment acquisition module is used for constructing an environment damage typical experiment and comprises a typical environment condition model and a typical experiment condition model;
the blade aerodynamic performance function relation acquisition module is used for constructing a front paint damage-lift resistance coefficient database; forming a front paint layer damage of the airfoil experimental part by using a typical environment condition model and a typical experimental condition model, measuring airfoil experimental part lifting resistance data after the front paint layer damage, combining to obtain a front paint layer damage-lifting resistance coefficient function relation curve, and accumulating to form a front paint layer damage-lifting resistance coefficient database;
the blade aerodynamic performance attenuation condition acquisition module is used for evaluating the aerodynamic performance attenuation condition of the blade of the wind generating set; and calculating the lifting resistance coefficient data after the damage of the front edge paint layer by measuring the damage of the front edge paint layer of the blade by using the front edge paint layer damage-lifting resistance coefficient database, carrying out numerical simulation on the normal power generation operation condition of the wind generating set, and analyzing to obtain the aerodynamic performance attenuation condition of the blade of the wind generating set.
Claims (8)
1. The method for detecting the aerodynamic performance attenuation of the wind generating set blade is characterized by comprising the following steps of:
step 1) constructing an environment damage typical experimental link: obtaining a typical environmental condition model and a typical experimental condition model;
the building process of the typical environment condition model comprises the following steps: the environmental resource information of the regional gas stations is collected and arranged, the composition and characteristic parameters of the damage factors of the wind turbine generator system blade environment of the wind power plant in each region are obtained through analysis, a typical environmental condition model is formed, and the typical environmental condition model is recorded as a typical environmental conditionWherein the subscript i denotes a typical environmentA situation model number;
step 2) constructing a front paint damage-resistance coefficient database link: taking a typical environmental condition model as a reference, performing an accelerated environmental damage experiment on the airfoil experimental member to form an airfoil experimental member front edge paint layer damage with typical environmental condition characteristics; the airfoil experimental part is designed according to the scaling of airfoil models of aerodynamic efficiency output sections of various types of blades and is marked as a typical airfoil model；
Measuring airfoil test lift resistance data after the front paint layer is damaged through an aerodynamic test;
combining the accelerated environmental damage experimental time serving as a corresponding parameter to obtain a front paint damage-liter resistance coefficient function relation curve, and accumulating to form a front paint damage-liter resistance coefficient database;
step 3) analyzing the blade aerodynamic performance attenuation condition link: and calculating the lifting resistance coefficient data after the damage of the front edge paint layer by measuring the damage of the front edge paint layer of the blade by using the front edge paint layer damage-lifting resistance coefficient database, carrying out numerical simulation on the normal power generation operation condition of the wind generating set, and analyzing to obtain the aerodynamic performance attenuation condition of the blade of the wind generating set.
2. The method for detecting the aerodynamic performance attenuation of a blade of a wind generating set according to claim 1, wherein the environmental damage factor of the blade is one or a combination of a plurality of rain erosion, corrosion and aging.
3. The method for detecting aerodynamic performance decay of a wind turbine blade according to claim 1, wherein in step 1), the process of establishing the typical experimental condition model is as follows: by carrying out numerical simulation on wind resources of a wind power plant, typical parameters of normal power generation operation conditions of wind generating sets of various numbers are obtained through analysis, and each position of the blades in the extending mode is calculated by combining the torsion angle distribution of the bladesEquivalent inflow angle function corresponding to section airfoil>And equivalent incoming flow velocity function->The method comprises the steps of carrying out a first treatment on the surface of the And calculating the equivalent inflow angle corresponding to the airfoil experimental part>And equivalent incoming flow speed->A typical experimental condition model is formed, wherein the subscript j represents a typical experimental condition model number.
4. A method for detecting aerodynamic performance decay of a wind turbine blade according to claim 3, wherein said equivalent inflow angleAnd equivalent incoming flow speed->Is calculated by adopting the dimension principle in combination with the airfoil experimental piece.
5. The method for detecting aerodynamic performance decay of a wind turbine blade according to claim 1, characterized in that in step 2) it comprises the steps of:
(21) For typical airfoil modelsIn typical environmental conditions->Based on the environmental damage factor, developing an accelerated environmentInjury experiment work;
monitoring a typical airfoil modelContinuously recording the intersecting arc length of the damaged area of the front paint layer and the spanwise cross section>It is combined with a typical airfoil model>Chord length->The ratio of (2) is defined as the characteristic of damage to the paint layer at the front edge>The expression is:
wherein,,the accelerated environmental injury experiment time is represented;
(22) Current paint damage characteristic parameter incrementWhen the minimum resolution value of the experimental measurement is reached, the typical airfoil model after the damage of the front paint layer is +.>Under the condition of meeting the corresponding typical experimental conditions, carrying out aerodynamic experimental work;
the expression of the damage characteristic parameter increment of the front paint layer is as follows:
measuring the lift resistance and converting to obtain lift coefficientAnd resistance coefficient->Wherein->The accelerated environmental injury experiment time is represented;
matching the same accelerated environmental injury test timeThe damage characteristic parameters, lift coefficient and resistance coefficient of the front paint layer at the moment form a corresponding relation and are recorded as data points +.>；
(23) Repeating the steps (21) and (22) to obtain a series of data pointsCombining to obtain a typical airfoil model->In typical environmental conditions->Leading edge paint damage-lift coefficient curve under conditions:
and a leading edge paint damage-resistance coefficient curve:
；
(24) Traversing typical environmental conditionsTraversing typical airfoil models->And obtaining a database of damage-liter resistance coefficients of the front paint layer.
6. The method for detecting aerodynamic performance decay of a wind turbine blade according to claim 1, characterized in that in step 3), it comprises the steps of:
(31) Detecting damage characteristic parameters of paint layer at front edge of blade of wind generating setThe expression is:
wherein,,indicating the position of the blade in the spanwise direction->Indicating the intersection arc length of the damaged area of the front paint layer and the spanwise cross section, +.>Representing the chord length of the section in the spanwise direction;
(32) Judging the typical environment condition of the wind farm according to the environmental resource information of the wind farmThe method comprises the steps of carrying out a first treatment on the surface of the According to wind power generatorPneumatic profile information of the group of blades is judged to be a typical airfoil model +.>The method comprises the steps of carrying out a first treatment on the surface of the In the front paint damage-lift coefficient database, a corresponding front paint damage-lift coefficient curve is found:
and a leading edge paint damage-resistance coefficient curve:
；
combining blade front edge paint layer damage characteristic parametersThe detection result is that the rising resistance coefficient data after the damage of the paint layer at the front edge of the wind generating set blade operated by the wind power plant is obtained by a data linear interpolation method, namely +.>And；
(33) Numerical simulation of normal power generation operation conditions of the wind generating set is carried out, an original set power curve is corrected, annual energy generation quantity attenuation data of the set are calculated, and the pneumatic performance attenuation conditions of blades of the wind generating set are obtained; and if the annual energy production decay data of the unit exceeds the technical requirement threshold, repairing the damage of the paint layer at the front edge of the blade.
7. The method for detecting aerodynamic performance decay of a wind turbine blade according to claim 6, wherein the wind turbine blade leading edge paint damage characteristic parametersTaking the average value of the corresponding results of the blades matched with the same wind generating set +.>Where k represents the blade number.
8. A wind turbine blade aerodynamic performance decay test system for performing the wind turbine blade aerodynamic performance decay detection method of any one of claims 1-7, comprising:
the environment damage experiment acquisition module is used for constructing an environment damage typical experiment and comprises a typical environment condition model and a typical experiment condition model;
the blade aerodynamic performance function relation acquisition module is used for constructing a front paint damage-lift resistance coefficient database; forming a front paint layer damage of the airfoil experimental part by using a typical environment condition model and a typical experimental condition model, measuring airfoil experimental part lifting resistance data after the front paint layer damage, combining to obtain a front paint layer damage-lifting resistance coefficient function relation curve, and accumulating to form a front paint layer damage-lifting resistance coefficient database;
the blade aerodynamic performance attenuation condition acquisition module is used for evaluating the aerodynamic performance attenuation condition of the blade of the wind generating set; and calculating the lifting resistance coefficient data after the damage of the front edge paint layer by measuring the damage of the front edge paint layer of the blade by using the front edge paint layer damage-lifting resistance coefficient database, carrying out numerical simulation on the normal power generation operation condition of the wind generating set, and analyzing to obtain the aerodynamic performance attenuation condition of the blade of the wind generating set.
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| JP2007057346A (en) * | 2005-08-24 | 2007-03-08 | Toshiba Corp | Damage evaluation system of heat barrier coating and damage evaluation method |
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