CN106704102B - For determining the method and system of the blade balance situation of wind power generating set - Google Patents

For determining the method and system of the blade balance situation of wind power generating set Download PDF

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Publication number
CN106704102B
CN106704102B CN201611256077.0A CN201611256077A CN106704102B CN 106704102 B CN106704102 B CN 106704102B CN 201611256077 A CN201611256077 A CN 201611256077A CN 106704102 B CN106704102 B CN 106704102B
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blade
wind speed
parameter data
hub height
strain parameter
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CN106704102A (en
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聂峰
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D7/00Controlling wind motors
    • F03D7/02Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06Rotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D7/00Controlling wind motors
    • F03D7/02Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0296Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor to prevent, counteract or reduce vibration or noise
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Abstract

This application involves the method and systems for determining the blade balance situation of wind power generating set.This method include monitor wind power generating set hub height wind speed and with predetermined wind speed threshold value comparison;When hub height wind speed is less than or equal to predetermined wind speed threshold value, the strain transducer being arranged on blade is demarcated;And when hub height wind speed is greater than predetermined wind speed threshold value: obtaining N number of blade strain parameter data corresponding with the strain of N number of blade respectively, which is calculated according to by the strain data of the collected N number of blade of strain transducer respectively;Calculate the difference of the two blade strain parameter data in the combination each including two blade strain parameter data in N number of blade strain parameter data and the ratio of any blade strain parameter data;By all ratios compared with predetermined threshold, and when any ratio is greater than predetermined threshold, determine that wind power generating set is in blade non-equilibrium state.

Description

For determining the method and system of the blade balance situation of wind power generating set
Technical field
The present invention relates to wind power generation fields, more particularly, to determine the side of the blade balance situation of wind power generating set Method and system.
Background technique
Wind-driven generator is the equipment for converting wind energy into electric energy.The blade of Wind power propelling wind-driven generator, sends out wind-force The blade of motor rotates.Blade captures the critical component of wind energy as wind-driven generator, and performance directly affects wind-driven generator Overall performance and power generating quality.It due to transport of blades, lifts and is exposed under harsh climate environment for a long time, vulnerable to mad The boisterous influence such as wind, lightning, ice and snow.Moreover, blade long-term work under conditions of load wide fluctuations, is easy The various failures such as existing crackle, breakage, icing, bolt looseness.The failures such as blade is cracked, damaged, icing, bolt looseness are often Show as the imbalance of blade.
The imbalance of blade has a great impact to the safe operation of wind power generating set, such as blade imbalance not only shadow The generating efficiency of unit is rung, while imbalance will lead to unit vibration, base bearing, the damage of yaw system or tower etc. is serious Accident.
Summary of the invention
The embodiment provides a kind of method for determining the blade balance situation of wind power generating set, packets It includes: obtaining N number of blade strain parameter data corresponding with the strain of N number of blade in wind power generating set respectively, N number of leaf Piece strain parameter data are calculated according to the strain data of N number of blade respectively, and wherein N is the integer more than or equal to 2;It calculates It each include two blade strain parameters in the combination of two blade strain parameter data in N number of blade strain parameter data The ratio of any blade strain parameter data in the difference of data and the two blade strain parameter data, to obtainA ratio;And by obtained ratio respectively compared with predetermined threshold, and work as obtained ratio When any ratio in value is greater than predetermined threshold, determine that wind power generating set is in blade non-equilibrium state.
In some embodiments, in the ratio calculated the step of, any blade in two blade strain parameter data is answered Variable element data are the lesser blade strain parameter data in the two blade strain parameter data.
In some embodiments, the method for determining the blade balance situation of wind power generating set further include: with acquisition N A blade strain parameter data synchronously obtain the hub height wind speed of wind power generating set;And when the step of in ratio calculated In any ratio in obtained ratio when being greater than predetermined threshold, determine wind power generating set under hub height wind speed In blade non-equilibrium state.
In some embodiments, the step of acquisition hub height wind speed includes obtaining at K time point in scheduled time slot K hub height wind speed is taken, wherein K is the integer more than or equal to 1, and each wheel hub in K hub height wind speed is high Degree wind speed is categorized in corresponding scheduled hub height wind speed interval;The step of obtaining N number of blade strain parameter data Including obtaining K blade strain parameter data at K time point in scheduled time slot for each blade in N number of blade, And it is directed to scheduled hub height wind speed interval, calculates and be sorted in all wheels in scheduled hub height wind speed interval Hub height wind speed synchronizes the average value of the blade strain parameter data for the blade being acquired, as with scheduled hub height wind The blade strain parameter data of the corresponding blade in fast section, to obtain corresponding with scheduled hub height wind speed interval N number of blade strain parameter data;And when any ratio in the step of in ratio calculated in obtained ratio is greater than in advance When determining threshold value, determine that wind power generating set is in blade non-equilibrium state in scheduled hub height wind speed interval.
In some embodiments, the step of acquisition hub height wind speed includes obtaining at the M time point in predetermined period M hub height wind speed of wind power generating set is taken, wherein M is the integer more than or equal to 1, and calculates M hub height wind The average value of speed is as hub height wind speed;And the step of obtaining N number of blade strain parameter data includes in N number of blade Each blade, corresponding with blade M blade strain parameter data are obtained at M time point in scheduled time slot, And blade strain parameter data of the average value as the blade for calculating M blade strain parameter data, to obtain N number of leaf Piece strain parameter data.
In some embodiments, the step of obtaining hub height wind speed includes the K pre- sub-periods in predetermined period Each of M hub height wind speed of wind power generating set is obtained at M time point in pre- sub-period, wherein M is big In the integer equal to 1, and the average value of M hub height wind speed is calculated as hub height corresponding with pre- sub-period Wind speed, to obtain K hub height wind speed corresponding with the pre- sub-period of K;And obtain N number of blade strain parameter number According to the step of include M for each blade in N number of blade, in the pre- sub-period of each of K pre- sub-periods M blade strain parameter data corresponding with the blade are obtained at time point, and calculate M blade strain parameter data Blade strain parameter data of the average value as the blade corresponding with pre- sub-period, to obtain and the K predetermined period of the day from 11 p.m. to 1 a.m K blade strain parameter data of the corresponding blade of section.
In some embodiments, blade strain parameter data include the moment of flexure data of blade.
According to an embodiment of the invention, additionally providing and a kind of being for determine the blade balance situation of wind power generating set System, comprising: blade strain parameter data acquisition facility, for obtaining the strain with N number of blade in wind power generating set respectively Corresponding N number of blade strain parameter data, N number of blade strain parameter data are respectively according to the strain data quilt of N number of blade It is calculated, wherein N is the integer more than or equal to 2;Blade strain parameter comparing device each includes N number of for calculating The difference of two blade strain parameter data in the combination of two blade strain parameter data in blade strain parameter data With the ratio of any blade strain parameter data in the two blade strain parameter data, to obtain A ratio;And blade balance situation determining device, for obtained ratio respectively compared with predetermined threshold, and to be worked as institute When any ratio in obtained ratio is greater than predetermined threshold, determine that wind power generating set is in blade non-equilibrium state.
In some embodiments, in blade strain parameter comparing device, in two blade strain parameter data Any blade strain parameter data are the lesser blade strain parameter data in the two blade strain parameter data.
In some embodiments, the system for determining the blade balance situation of wind power generating set further include: wheel hub is high Wind speed acquisition device is spent, for synchronously obtaining the hub height of wind power generating set with the N number of blade strain parameter data of acquisition Wind speed, and hub height wind speed is transferred to blade balance situation determining device, and in blade balance situation determining device, When any ratio in obtained ratio is greater than predetermined threshold, blade balance situation determining device determines wind power generating set Blade non-equilibrium state is under the hub height wind speed.
In some embodiments, K wheel is obtained at the K time point of hub height wind speed acquisition device in scheduled time slot Hub height wind speed, wherein K is the integer more than or equal to 1, and each hub height wind speed in K hub height wind speed is returned Class is in corresponding scheduled hub height wind speed interval;Blade strain parameter data acquisition facility is in N number of blade Each blade, K blade strain parameter data are obtained at K time point in scheduled time slot, and for scheduled wheel Hub height wind speed interval calculates quilt synchronous with all hub height wind speed being sorted in scheduled hub height wind speed interval The average value of the blade strain parameter data of the blade obtained is somebody's turn to do as corresponding with scheduled hub height wind speed interval The blade strain parameter data of blade, to obtain N number of blade strain ginseng corresponding with scheduled hub height wind speed interval Number data;And in blade balance situation determining device, when any ratio in obtained ratio is greater than predetermined threshold, Blade balance situation determining device determines that wind power generating set is in blade imbalance shape in scheduled hub height wind speed interval State.
In some embodiments, hub height wind speed acquisition device obtains wind-force at the M time point in predetermined period M hub height wind speed of generating set, wherein M is the integer more than or equal to 1, and calculates the flat of M hub height wind speed Mean value is as hub height wind speed;And blade strain parameter data acquisition facility is for each blade in N number of blade, pre- M blade strain parameter data corresponding with the blade are obtained at M time point in timing section, and calculate M blade Blade strain parameter data of the average value of strain parameter data as the blade, to obtain N number of blade strain parameter data.
In some embodiments, every in K of the hub height wind speed acquisition device in predetermined period pre- sub-periods M hub height wind speed of wind power generating set is obtained at M time point in a pre- sub-period, wherein M is more than or equal to 1 Integer, and calculate the average value of M hub height wind speed as hub height wind speed corresponding with pre- sub-period, from And obtain K hub height wind speed corresponding with the pre- sub-period of K;And blade strain parameter data acquisition facility is directed to Each blade in N number of blade was obtained and is somebody's turn to do at M time point in the pre- sub-period of each of K pre- sub-periods The corresponding M blade strain parameter data of blade, and calculate the average value of M blade strain parameter data as with it is predetermined The blade strain parameter data of the corresponding blade of sub-period, to obtain the blade corresponding with K pre- sub-periods K blade strain parameter data.
In some embodiments, blade strain parameter data include the moment of flexure data of blade.
The method for determining the blade balance situation of wind power generating set that the embodiment provides a kind of and it is System.It is determined by the blade balance situation to wind power generating set, staff can be according to the leaf of wind power generating set Piece equilibrium condition definitive result makes the corresponding measure of reply blade non-equilibrium state.In addition, by existing to wind power generating set Blade balance situation under different operating environmental aspect is determined, and staff can be in conjunction with spy locating for wind power generating set Determine operating environment condition and makes corresponding measure to reduce the damage caused by wind power generating set of blade imbalance.
Detailed description of the invention
The present invention may be better understood from the description with reference to the accompanying drawing to a specific embodiment of the invention wherein, The same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 shows the example of the blade balance situation for determining wind power generating set of embodiment according to the present invention Property system;
Fig. 2 shows the exemplary strain transducers on the blade in the wind power generating set of embodiment according to the present invention Setting;
Fig. 3 is the root of blade for being provided with strain transducer in the wind power generating set of embodiment according to the present invention Cross-sectional view;
Fig. 4 shows the another of the blade balance situation for determining wind power generating set of embodiment according to the present invention Exemplary system;
Fig. 5 shows the another of the blade balance situation for determining wind power generating set of embodiment according to the present invention Exemplary system;
Fig. 6 shows the another of the blade balance situation for determining wind power generating set of embodiment according to the present invention Exemplary system;
Fig. 7 shows the example of the blade balance situation for determining wind power generating set of embodiment according to the present invention Property statistical parameter table;
Fig. 8 is the exemplary side of the blade balance situation for determining wind power generating set of embodiment according to the present invention The flow chart of method;
Fig. 9 is another example of the blade balance situation for determining wind power generating set of embodiment according to the present invention The flow chart of property method;
Figure 10 is embodiment according to the present invention for determining that the another of blade balance situation of wind power generating set shows The flow chart of example property method;
Figure 11 is embodiment according to the present invention for determining that the another of blade balance situation of wind power generating set shows The flow chart of example property method;And
Figure 12 is embodiment according to the present invention for determining that the another of blade balance situation of wind power generating set shows The flow chart of example property method.
Description of symbols:
101,401,501,601- wind power generating set;201,202,203- blade;204- strain transducer;102,402, 502,602- blade strain parameter data acquisition facility;103,403,503,603- blade strain parameter comparing device; 104,404,504,604- blade balance situation determining device;405,505,605- hub height wind speed acquisition device;105, 406,506,606- strain transducer caliberating device.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description In, many details are proposed, in order to provide complete understanding of the present invention.But to those skilled in the art It will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to implementation The description of example is used for the purpose of providing by showing example of the invention and better understanding of the invention.The present invention never limits In any concrete configuration set forth below and algorithm, but cover under the premise of without departing from the spirit of the present invention element, Any modification, replacement and the improvement of component and algorithm.In the the accompanying drawings and the following description, well known structure and skill is not shown Art is unnecessary fuzzy to avoid causing the present invention.
The embodiment of the present invention provides a kind of system for determining the blade balance situation of wind power generating set.The system It can monitor whether wind power generating set is in blade non-equilibrium state.When there is blade energy imbalance, police can be issued Report, enables staff to make corresponding measure in time, avoids wind-driven generator that bigger failure occurs.
Fig. 1 shows the blade balance situation for determining wind power generating set 101 of embodiment according to the present invention Exemplary system 100.As shown in Figure 1, the exemplary system includes blade strain parameter data acquisition facility 102, blade strain Supplemental characteristic comparison device 103, blade balance situation determining device 104 and strain transducer caliberating device 105.Blade strain ginseng The relevant supplemental characteristic of the number available strain of each blade to wind power generating set 101 of data acquisition facility 102, and general Acquired supplemental characteristic is sent to blade strain parameter comparing device 103.Blade strain parameter comparing device 103 Received supplemental characteristic relevant with the strain of each blade is compared, and comparison result is sent to blade balance Situation determining device 104.The comparison result based on the received of blade balance situation determining device 104, judges wind-driven generator Whether group is in blade non-equilibrium state.The wheel hub that strain transducer caliberating device 105 can monitor wind power generating set 101 is high Wind speed is spent, and in the case where the wind speed is less than or equal to predetermined wind speed threshold value, to being arranged on the wind power generating set In each blade on strain transducer demarcated.
Fig. 2 is the sensor on the blade shown in the example wind power generating set 101 of embodiment according to the present invention The schematic diagram of setting.Fig. 3 is the leaf for being provided with strain transducer in the wind power generating set 101 of embodiment according to the present invention The cross-sectional view of piece root.Below with reference to Fig. 1, Fig. 2 and Fig. 3 detailed description embodiment according to the present invention for determining The operating process of the exemplary system of the blade balance situation of wind power generating set 101.
As shown in Fig. 2, example wind power generating set 101 includes three blades 201,202 and 203, wherein each blade Root area is provided with strain transducer 204.In Fig. 2, purpose to simplify the explanation, example wind power generating set 101 It only include three blades, but the present invention does not limit the lobe numbers in wind power generating set, implementation according to the present invention Example can be used for assessing the blade balance situation of the wind power generating set including N number of blade, and wherein N is the integer more than or equal to 2. As shown in Figures 2 and 3, for example, each setting at 0 °, 90 °, 180 ° and 270 ° of the section in each root of blade outer circle region One strain transducer 204 (0 ° is leading edge locus, and 180 ° are posterior border position).The strain transducer 204 is, for example, fiber grating Strain transducer.The working principle of fiber Bragg grating strain sensor acquisition strain data: when effect of the fiber grating by power, light The central wavelength of the light of fine optical grating reflection changes, and can use the optical signal and optical fiber of input optical fibre grating strain transducer The wavelength difference between optical signal that grating strain transducer is reflected back judges the specific value of strain.Wind power generating set has When can in high humidity, smog or thunder and lightning working environment in, fiber Bragg grating strain sensor is made by optical fiber, the insulation of optical fiber Performance is good, corrosion-resistant, stable chemical performance, is not necessarily to power drives, and the optical signal transmitted in fiber Bragg grating strain sensor is not It is influenced by electromagnetic interference, in the working environment of high humidity, smog, thunder and lightning or electromagnetic interference, can stablize use.
Four being equidistant to root of blade of strain transducer 204, the section in root of blade outer circle region and pitch axis The end face held is parallel, thus make strain transducer 204 be able to detect that it is corresponding with shimmy (edgewise) strain and with wave (flapwise) corresponding strain.The collected strain data of institute is transferred to and 204 phase of strain transducer by strain transducer 204 The blade strain parameter data acquisition facility 102 of connection.Blade strain parameter data acquisition facility 102 obtains and each blade phase The strain data of pass can suitably calculate strain data, to obtain the blade convenient for determining wind power generating set The supplemental characteristic relevant to the strain of each blade (being hereinafter called strain parameter data for short) of equilibrium condition.Strain parameter Data for example can be stress, moment of flexure, moment of mass or vibratory output of blade etc..
The operation of the exemplary system 100 of embodiment according to the present invention is described by taking the moment of flexure of blade as an example below Journey.Firstly, strain transducer caliberating device 105 can monitor the hub height wind speed of wind power generating set, and low wind speed, Pair of strain sensors 204 is demarcated under impeller stationary state.Specifically, the feelings of predetermined wind speed threshold value are less than or equal in wind speed Under condition, the impeller of wind power generating set remains static, and can be approximately considered blade at this time and be subjected only to gravity bending moment, and leaf Wheel reaches balance under the action of gravity bending moment.Due to each blade in the fabrication process mass density distribution and it is non-uniform, often Otherness can be all presented in position of centre of gravity, the leaf weight of branch blade.Therefore, it basis can be arranged under impeller stationary state The strain transducer 204 of three roots of blade measures obtained strain data pair of strain sensors 204 and is demarcated.With optical fiber light For grid strain transducer, initial reflection wavelength is λ0.In the state that low wind speed, impeller are static, it is mounted on blade root The reflection wavelength that the fiber-optic grating sensor measurement in portion obtains is λ '0.And so on, 12 optical fiber grating sensings are obtained respectively The reflection wavelength variation of device in low wind conditions, and the reflection wavelength after corresponding to variation is demarcated, three blades are being waved Pneumatic moment of flexure with edgewise direction is zero.
After the calibration for completing strain transducer 204, in the case where wind speed is greater than predetermined wind speed threshold value, impeller is in wind It is rotated under power effect.The moment of flexure that blade is subject at this time is the superposition of the gentle kinetic moment of gravitational moment.Using calibrated The moment of flexure that the collected strain data of fiber Bragg grating strain sensor is calculated is pneumatic moment of flexure.Then, blade strain ginseng Number data acquisition facilities 102 can the strain data of each blade, the blade based on the received factory-designed blade Center of gravity or leaf quality Density Distribution calculate the moment of flexure Y of the blade.Blade strain parameter comparing device 103 can calculate The ratio of the moment of flexure of the difference of the moment of flexure of blade and one of blade two-by-two in all blades in wind power generating set 101, It exports as comparison result to blade balance situation determining device 104.Blade balance situation determining device 104 can will be received To comparison result be compared with predetermined threshold, if comparison result be more than predetermined threshold, can be determined that blade occurred Energy imbalance.For example, blade strain parameter data acquisition facility 102 can be according to the strain data of acquired each blade The moment of flexure Y1 of blade 201, the moment of flexure Y2 of blade 202 and the moment of flexure Y3 of blade 203 are calculated, and the calculated blade of institute is curved Square is transferred to blade strain parameter comparing device 103.Blade strain parameter comparing device 103 can calculate three The difference of any two blade bending moment in blade bending moment and the ratio of any blade bending moment in the two blade bending moments, such as A1=| Y1-Y2 |/Y2, a2=| Y2-Y3 |/Y3 and a3=| Y3-Y1 |/Y1, and passed these three ratios as comparison result It is defeated by blade balance situation determining device 104.Alternatively, it is highly preferred that blade strain parameter comparing device 103 can calculate The difference of any two blade bending moment in three blade bending moments and the lesser blade in the two blade bending moments are curved out The ratio of square, such as a1=| Y1-Y2 |/min (Y1, Y2), a2=| Y2-Y3 |/min (Y2, Y3) and a3=| Y3-Y1 |/min (Y3, Y1), and blade balance situation determining device 104 is transferred to using these three ratios as comparison result.Then, blade is flat A1, a2 and a3 can be compared with predetermined threshold by weighing apparatus situation determining device 104 respectively, if any in a1, a2 and a3 It is a to be greater than predetermined threshold, then it can be determined that wind power generating set 101 is in blade non-equilibrium state.
When wind power generating set 101 includes N number of blade, blade strain parameter data acquisition facility 102 can calculate N A blade bending moment, then blade strain parameter comparing device 103 can calculate each including any in N number of blade bending moment The difference of two blade bending moments in the combination of two blade bending moments and the ratio of any blade bending moment in the two blade bending moments, Or it is highly preferred that it includes any in N number of blade bending moment that blade strain parameter comparing device 103, which can calculate each, The difference of two blade bending moments in the combination of two blade bending moments and the lesser blade in the two blade bending moments are curved The ratio of square.In this manner it is achieved that blade strain parameter comparing device 103 is availableIt is a Ratio, and blade balance situation determining device 104 is transferred to using these ratios as comparison result.Blade balance situation determines dress Setting 104 can be compared received all ratios with predetermined threshold respectively, when any one ratio is greater than predetermined threshold When, it is possible to determine that wind power generating set 101 is in blade non-equilibrium state.
Exemplary system 100 shown in Fig. 1 can also include warning device.When blade balance situation determining device 104 When determining that wind power generating set 101 is in blade non-equilibrium state, warning device can be triggered and sounded an alarm, to notify work people Member's wind power generating set 101 is in blade non-equilibrium state, makes corresponding measure in time convenient for staff.
As described above, in exemplary system 100 shown in Fig. 1, by the blade in monitoring wind power generating set Instantaneous strain data, can determine the instantaneous blade balance situation of wind power generating set.Under normal circumstances, above-mentioned instantaneous state It determines and can satisfy determining requirement, but some blade non-equilibrium states are when wind power generating set is in specific working environment Shi Caihui is showed under situation, such as can just be showed under some specific hub height wind speed.In order to determine wind Blade balance situation of the power generator group under specific operating environment condition, the embodiments of the present invention also provide for specific Operating environment condition determination system.
Fig. 4 shows the blade balance situation for determining wind power generating set 401 of embodiment according to the present invention Another exemplary system.As shown in figure 4, the exemplary system includes blade strain parameter data acquisition facility 402, blade strain Supplemental characteristic comparison device 403, blade balance situation determining device 404, hub height wind speed acquisition device 405 and strain sensing Device caliberating device 406.Wind power generating set 401 shown in Fig. 4, blade strain parameter data acquisition facility 402, blade strain Supplemental characteristic comparison device 403 and strain transducer caliberating device 406 are answered with wind power generating set 101, blade shown in Fig. 1 The function of variable element data acquisition facility 102, blade strain parameter comparing device 103 and strain transducer caliberating device 105 Can be identical, therefore be no longer described in detail here.Unlike exemplary system shown in FIG. 1, example shown in Fig. 4 Hub height wind speed acquisition device 405 is increased in property system, the device is synchronous with blade strain parameter data acquisition facility 402 Ground obtains the hub height wind speed of wind power generating set 401, and the hub height wind speed is transferred to blade balance situation and is determined Device 404.In addition, the ratio that blade balance situation determining device 404 carrys out the transmission of blade strain parameter comparing device 403 Compared with predetermined threshold, when any ratio is greater than predetermined threshold, blade balance situation determining device 404 determines wind-driven generator Group 401 is in blade non-equilibrium state under the hub height wind speed.
Fig. 5 shows the blade balance situation for determining wind power generating set 501 of embodiment according to the present invention Another exemplary system.As shown in figure 5, the exemplary system includes blade strain parameter data acquisition facility 502, blade strain Supplemental characteristic comparison device 503, blade balance situation determining device 504, hub height wind speed acquisition device 505 and strain sensing Device caliberating device 506.Device shown in Fig. 5 is similar with the function of device shown in Fig. 4, the difference is that institute in Fig. 5 The exemplary system shown is to hub height wind speed and strain parameter data in such a way that point storehouse statistics is determining.Due to the gas of blade Dynamical bending moment changes and transient change with wind speed, handles so carrying out a point storehouse.Namely in each wind speed numerical intervals, to three Blade is waved to be compared with the moment of flexure of edgewise direction, to judge whether air-balance.In the exemplary system, wheel hub is high Degree wind speed range is divided into the section (hereinafter simply referred to as storehouse) of predetermined number.For example, being directed to an incision hub height wind speed For 3m/s, the wind power generating set that hub height wind speed is 25m/s is cut out, according to mono- storehouse hub height wind speed 0.5m/s to institute Blade strain parameter data in the different wind speed storehouses of acquisition carry out classification statistics.Hub height wind speed acquisition device 505 and leaf Piece strain parameter data acquisition facility 502 is constantly synchronous within the scheduled period to obtain hub height wind speed and strain parameter number According to, such as the synchronous K hub height wind speed and a for the K of each blade of obtaining at K time point within the scheduled period Strain parameter data, wherein K is greater than the integer equal to 1.Hub height wind speed acquisition device 505 is by acquired each wheel hub Height wind speed is referred in scheduled storehouse corresponding thereto.Blade strain parameter data acquisition facility 502 is directed to each blade, Calculate with all hub height wind speed for being classified into scheduled storehouse synchronize the strain parameter data of the blade that are acquired Strain parameter data of the average value as the blade corresponding with the scheduled hub height wind speed storehouse, to obtain and make a reservation for The corresponding N number of blade strain parameter data in hub height wind speed storehouse.Later, blade strain parameter comparing device 503 According to the mode similar with blade strain parameter comparing device 103 shown in Fig. 1 to N number of blade strain parameter data into Row compares, and obtains the ratio determined for blade balance situation.Blade balance situation determining device 504 is by blade strain parameter number The ratio come according to the transmission of comparison device 503 is compared with predetermined threshold, when any ratio is greater than predetermined threshold, blade balance situation Determining device 504 determines that wind power generating set 501 is in blade non-equilibrium state under scheduled hub height wind speed.
Fig. 6 shows the blade balance situation for determining wind power generating set 601 of embodiment according to the present invention Another exemplary system.As shown in fig. 6, the exemplary system includes blade strain parameter data acquisition facility 602, blade strain Supplemental characteristic comparison device 603, blade balance situation determining device 604, hub height wind speed acquisition device 605 and strain sensing Device caliberating device 606.Device shown in Fig. 6 is similar with the function of device shown in Fig. 5, the difference is that institute in Fig. 6 The exemplary system shown is to hub height wind speed and strain parameter data using the statistics determination of time statistical average superposition point storehouse Mode.
It is described in detail by taking the hub height wind speed of wind power generating set as an example below with reference to Fig. 7 as shown in FIG. 6 exemplary How system carries out statistics determination to blade balance situation of the wind power generating set 601 under different operating environmental aspect.Fig. 7 shows The exemplary statistical parameter table of the blade balance situation for determining wind power generating set of embodiment according to the present invention is gone out. For example, being 3m/s, cutting out the wind power generating set that hub height wind speed is 25m/s for an incision hub height wind speed, press Classification system is carried out to the blade strain parameter data in acquired different wind speed storehouses according to mono- storehouse hub height wind speed 0.5m/s Meter.Blade strain parameter data acquisition facility 602 is including K pre- sub-periods (the pre- sub-period is, for example, 10 minutes) The strain data that three blades in wind power generating set 601 are continuously acquired in predetermined period calculates three according to strain data The moment of flexure of blade, wherein K is the integer more than or equal to 1.For example, being directed to each blade, blade strain parameter data acquisition facility The moment of the blade obtained at M time point in every 10 minutes is stored as a data packet by 602, calculates every 10 points The average moment Y of each blade in clock1#10min、Y2#10minAnd Y3#10min, and obtained average moment is sent to leaf Piece strain parameter comparing device 603, wherein M is the integer more than or equal to 1.Hub height wind speed acquisition device 605 and leaf Piece strain parameter data acquisition facility 602 synchronously obtains hub height air speed data when wind power generating set 601 works, together Data acquired in every 10 minutes are stored as a data packet by sample, calculate the average hub height air speed value in every 10 minutes V10min.Blade strain parameter data acquisition facility 602 is according to average hub height air speed value V10minThe wind speed Cang Qu fallen into Between, respectively by the average moment Y of each blade acquired in same sub-period1#10min、Y2#10minAnd Y3#10minIt stores and institute State in the corresponding data space in wind speed storehouse section, for example, be added in exemplary statistical parameter table as shown in Figure 7 with it is described At the corresponding blade bending moment table position in wind speed storehouse section.After a predetermined period of time, such as in the section of each wind speed storehouse at least After having 3 groups of 10 minutes statistical average data, blade strain parameter data acquisition facility 602 is directed to each blade, calculates such as Fig. 7 Shown in the moment of flexure assembly average of the blade corresponding with each wind speed storehouse section that is stored in parameter list.Then, leaf Piece strain parameter comparing device 603 and blade balance situation determining device 604 can according to exemplary system shown in fig. 5 Similar mode of uniting determines wind-driven generator according to the moment of flexure assembly average of each blade for each wind speed storehouse section Blade balance situation of the group under the corresponding operating environment condition in each wind speed storehouse section.
For example, being stored with corresponding 3 group of 10 minute data, i.e., the moment of flexure of 3 the first blades for hub height wind speed storehouse Data Y1#10min_1、Y1#10min_2、Y1#10min_3;The moment of flexure data Y of 3 the second blades2#10min_1、Y2#10min_2、Y2#10min_3And 3 The moment of flexure data Y of a third blade3#10min_1、Y3#10min_2、Y3#10min_3.Under this sample situation, blade strain parameter data Acquisition device 602 is to Y1#10min_1、Y1#10min_2、Y1#10min_3It is averaging the first blade for obtaining being directed to hub height wind speed storehouse 1 Moment of flexure assembly average Y1, to Y2#10min_1、Y2#10min_2、Y2#10min_3It is averaging and obtains second for hub height wind speed storehouse 1 The moment of flexure assembly average Y2 of blade, and to Y3#10min_1、Y3#10min_2、Y3#10min_3Averaging is obtained for hub height wind The moment of flexure assembly average Y3 of the third blade in fast storehouse 1.Then in blade strain parameter comparing device 603, Ke Yiji Calculate any two blade bending moment assembly average in three blade bending moment assembly averages difference and one of blade The ratio a1=of moment of flexure assembly average | Y1-Y2 |/Y2, a2=| Y2-Y3 |/Y3 and a3=| Y3-Y1 |/Y1, and by three Ratio is transferred to blade balance situation determining device 604 as comparison result.Alternatively, it is highly preferred that blade strain parameter data Comparison device 603 can calculate in difference and the two blade bending moments of any two blade bending moment in three blade bending moments A lesser blade bending moment ratio, such as a1=| Y1-Y2 |/min (Y1, Y2), a2=| Y2-Y3 |/min (Y2, Y3) And a3=| Y3-Y1 |/min (Y3, Y1), and these three ratios are transferred to blade balance situation as comparison result and determine dress Set 604.In blade balance situation determining device 604, a1, a2 and a3 are compared with predetermined threshold respectively, if a1, a2 It is greater than predetermined threshold with any of a3, then can be determined that wind power generating set 601 in the corresponding work in hub height wind speed storehouse 1 Make under environmental aspect in blade non-equilibrium state.It, can be similarly true in a manner described for other hub height wind speed storehouse Determine the blade balance situation of wind power generating set 601.
Similarly, exemplary system shown in fig. 4 to fig. 6 can also include warning device.When blade balance situation is true Determine device and determines that wind power generating set when being in blade non-equilibrium state, can trigger warning device and sound an alarm, to notify work Make personnel's wind power generating set and be in blade non-equilibrium state, makes corresponding measure in time convenient for staff.In addition, Fig. 4 Blade balance shape of the wind power generating set under different operating environmental aspect can also be determined to exemplary system shown in Fig. 6 Condition combines specific work environments situation locating for wind power generating set to make corresponding measure to reduce blade convenient for staff Imbalance is damaged caused by wind power generating set.
Apparatus module shown in structural block diagram above according to the exemplary system of the embodiment of the present invention may be implemented For hardware, software, firmware or their combination.When realizing in hardware, electronic circuit, dedicated collection may, for example, be At circuit (ASIC), firmware appropriate, plug-in unit, function card etc..When being realized with software mode, element of the invention be by with The program or code segment of the task needed for executing.Program or code segment can store in machine readable media, Huo Zhetong The data-signal carried in carrier wave is crossed to send in transmission medium or communication links." machine readable media " may include can Any medium of storage or transmission information.The example of machine readable media include electronic circuit, semiconductor memory devices, ROM, Flash memory, erasable ROM (EROM), floppy disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment It can be downloaded via the computer network of internet, Intranet etc..
Fig. 8 is the exemplary side of the blade balance situation for determining wind power generating set of embodiment according to the present invention The flow chart of method.As shown in figure 8, the flow chart includes step 801,802,803,804 and 805.
Step 801: monitoring the hub height wind speed of wind power generating set and by the hub height wind speed and predetermined wind speed threshold Value is compared.
In the case where hub height wind speed is less than or equal to predetermined wind speed threshold value, step 802 is executed: to being arranged on wind The strain transducer on N number of blade in power generator group is demarcated.
In the case where hub height wind speed is greater than predetermined wind speed threshold value, step 803 is executed to 805.
Step 803: obtaining N number of blade strain ginseng corresponding with the strain of N number of blade in wind power generating set respectively Number data, wherein N is the integer more than or equal to 2.In this step, it can obtain first and be arranged on each of generating set in wind The collected strain data of strain transducer institute on a blade, then calculates according to strain data convenient for determining wind-power electricity generation The strain parameter data of the blade balance situation of unit.Strain parameter data for example can be moment of flexure, moment of mass or the vibration of blade Momentum etc..
: step 804: calculating each any two blade strain parameter number including in N number of blade strain parameter data According to combination in the differences of two blade strain parameter data answered with any blade in the two blade strain parameter data The ratio of variable element data, or it is highly preferred that each any two including in N number of blade strain parameter data can be calculated The difference of two blade strain parameter data in the combination of a blade strain parameter data and the two blade strain parameter numbers The ratio of lesser blade strain parameter data in.In this manner it is achieved that can be calculated in step 802A ratio.
Step 805: and all ratios will be worked as respectively compared with predetermined threshold by obtained all ratios in step 804 When any ratio in value is greater than predetermined threshold, determine that wind power generating set is in blade non-equilibrium state.
Fig. 9 is embodiment according to the present invention for determining the another exemplary of wind generator set blade equilibrium condition The flow chart of method.The flow chart includes step 901,902,903,904,905 and 906.
Step 901: monitoring the hub height wind speed of wind power generating set and by the hub height wind speed and predetermined wind speed threshold Value is compared.
In the case where hub height wind speed is less than or equal to predetermined wind speed threshold value, step 902 is executed: to being arranged on wind The strain transducer on N number of blade in power generator group is demarcated.
In the case where hub height wind speed is greater than predetermined wind speed threshold value, step 903 is executed to 906.
Step 903: obtaining N number of blade strain ginseng corresponding with the strain of N number of blade in wind power generating set respectively Number data, wherein N is the integer more than or equal to 2.In this step, it can obtain first and be arranged on each of generating set in wind The collected strain data of strain transducer institute on a blade, then calculates according to strain data convenient for determining wind-power electricity generation The strain parameter data of the blade balance situation of unit.Strain parameter data for example can be moment of flexure, moment of mass or the vibration of blade Momentum etc..
Step 904: the hub height wind of wind power generating set is synchronously obtained with the N number of blade strain parameter data of acquisition Speed.The hub height wind speed for example can be the hub height wind speed of wind power generating set.
Step 905: calculating each any two blade strain parameter data including in N number of blade strain parameter data Combination in two blade strain parameter data difference and the two blade strain parameter data in any blade strain The ratio of supplemental characteristic.
Step 906: and all ratios will be worked as respectively compared with predetermined threshold by obtained all ratios in step 905 When any ratio in value is greater than predetermined threshold, determine that wind power generating set is uneven in blade under the hub height wind speed Weighing apparatus state.
Figure 10 is embodiment according to the present invention for determining another example of wind generator set blade equilibrium condition The flow chart of property method.The flow chart includes step 1001,1002,1003,1004,1005 and 1006.
Step 1001: monitoring the hub height wind speed of wind power generating set and by the hub height wind speed and predetermined wind speed threshold Value is compared.
In the case where hub height wind speed is less than or equal to predetermined wind speed threshold value, step 1002 is executed: to being arranged on The strain transducer on N number of blade in wind power generating set is demarcated.
In the case where hub height wind speed is greater than predetermined wind speed threshold value, step 1003 is executed to 1006.
Step 1003: at K time point in scheduled time slot obtain K hub height wind speed, wherein K for more than or equal to 1 integer, and each hub height wind speed in K hub height wind speed is categorized in corresponding scheduled wheel hub height It spends in wind speed interval.
Step 1004: for each blade in N number of blade, being taken turns at K time point in scheduled time slot with acquisition K Hub height wind speed synchronously obtains K blade strain parameter data, and is directed to scheduled hub height wind speed interval, calculate with All hub height wind speed being sorted in the scheduled hub height wind speed interval synchronize the leaf for the blade being acquired The average value of piece strain parameter data, the blade as the blade corresponding with the scheduled hub height wind speed interval are answered Variable element data, to obtain N number of blade strain parameter data corresponding with the scheduled hub height wind speed interval.At this In step, the collected strain of strain transducer institute being arranged in wind on each blade of generating set can be obtained first Then data calculate the strain parameter data convenient for determining the blade balance situation of wind power generating set according to strain data. Strain parameter data for example can be moment of flexure, moment of mass or vibratory output of blade etc..
Step 1005: calculating each any two blade strain parameter number including in N number of blade strain parameter data According to combination in the differences of two blade strain parameter data answered with any blade in the two blade strain parameter data The ratio of variable element data.
Step 1006: will be in all ratios obtained in step 1005 compared with predetermined threshold, and work as in all ratios Any ratio be greater than predetermined threshold when, determine wind power generating set in scheduled hub height wind speed interval in blade not Equilibrium state.
Figure 11 is embodiment according to the present invention for determining another example of wind generator set blade equilibrium condition The flow chart of property method.The flow chart includes step 1101,1102,1103,1104,1105 and 1106.
Step 1101: monitoring the hub height wind speed of wind power generating set and by the hub height wind speed and predetermined wind speed threshold Value is compared.
In the case where hub height wind speed is less than or equal to predetermined wind speed threshold value, step 1102 is executed: to being arranged on The strain transducer on N number of blade in wind power generating set is demarcated.
In the case where hub height wind speed is greater than predetermined wind speed threshold value, step 1103 is executed to 1106.
Step 1103: M hub height wind speed of wind power generating set is obtained at the M time point in predetermined period, Wherein M is the integer more than or equal to 1, and calculates the average value of M hub height wind speed as hub height wind speed.
Step 1104: for each blade in N number of blade, at M time point in scheduled time slot with obtain M A hub height wind speed synchronously obtains M blade strain parameter data corresponding with the blade, and calculates M blade and answer Blade strain parameter data of the average value of variable element data as the blade, to obtain N number of blade strain parameter data.? In the step, the strain transducer institute being arranged in wind on each blade of generating set can be obtained first and collected is answered Then parameter evidence calculates the strain parameter number convenient for determining the blade balance situation of wind power generating set according to strain data According to.Strain parameter data for example can be moment of flexure, moment of mass or vibratory output of blade etc..
Step 1105: calculating each any two blade strain parameter number including in N number of blade strain parameter data According to combination in the differences of two blade strain parameter data answered with any blade in the two blade strain parameter data The ratio of variable element data.
Step 1106: will obtained all ratios are respectively compared with predetermined threshold in step 1105, and when all When any ratio in ratio is greater than predetermined threshold, determine that wind power generating set is in blade not under the hub height wind speed Equilibrium state.
Figure 12 is embodiment according to the present invention for determining another example of wind generator set blade equilibrium condition The flow chart of property method.The flow chart includes step 1201,1202,1203,1204,1205,1206,1207 and 1208.
Step 1201: monitoring the hub height wind speed of wind power generating set and by the hub height wind speed and predetermined wind speed threshold Value is compared.
In the case where hub height wind speed is less than or equal to predetermined wind speed threshold value, step 1202 is executed: to being arranged on The strain transducer on N number of blade in wind power generating set is demarcated.
In the case where hub height wind speed is greater than predetermined wind speed threshold value, step 1203 is executed to 1208.
Step 1203: each of K pre- sub-periods (such as each sub-period is 10 minutes) in predetermined period M hub height wind speed of wind power generating set is obtained at M time point in pre- sub-period, wherein M is more than or equal to 1 Integer, and calculate the average value of M hub height wind speed as hub height wind speed corresponding with the pre- sub-period, from And obtain K hub height wind speed corresponding with the pre- sub-period of K.
Step 1204: for each blade in N number of blade, in the pre- sub-period of each of K pre- sub-periods M time point at obtain M hub height wind speed synchronously obtain M blade strain parameter corresponding with the blade Data, and the average value of M blade strain parameter data is calculated as the blade corresponding with the pre- sub-period Blade strain parameter data, to obtain K blade strain parameter number of the blade corresponding with the pre- sub-period of K According to.In this step, the strain transducer being arranged in wind on each blade of generating set can be obtained first to be acquired Then the strain data arrived calculates according to strain data and joins convenient for the strain for determining the blade balance situation of wind power generating set Number data.Strain parameter data for example can be moment of flexure, moment of mass or vibratory output of blade etc..
Step 1205: each hub height wind speed in K hub height wind speed being categorized in corresponding scheduled In hub height wind speed interval.
Step 1206: it is directed to scheduled hub height wind speed interval, for each blade in N number of blade, calculating and quilt The blade that all hub height wind speed being categorized in the scheduled hub height wind speed interval synchronize the blade being acquired is answered The average value of variable element data, the blade strain parameter as the blade corresponding with the scheduled hub height wind speed interval Data, to obtain N number of blade strain parameter data corresponding with the scheduled hub height wind speed interval.
Step 1207: calculating each any two blade strain parameter number including in N number of blade strain parameter data According to combination in the differences of two blade strain parameter data answered with any blade in the two blade strain parameter data The ratio of variable element data.
Step 1208: will be in all ratios obtained in step 1207 compared with predetermined threshold, and work as in all ratios Any ratio be greater than predetermined threshold when, determine wind power generating set in scheduled hub height wind speed interval in blade not Equilibrium state.
It is each in these illustrative methods in the description above to the illustrative methods of embodiment according to the present invention Step is sequentially described and is shown in order in flow charts, but the present invention does not carry out the execution sequence of these steps Limitation, for example, some steps the step of being performed simultaneously, first describe can also the rear description the step of after be performed, and And some steps can be merged into a step or a step can be split into multiple steps.For example, shown in Fig. 9 Step 903 and 904 can be performed simultaneously;Step 1003 shown in Figure 10 and 1004 can be performed simultaneously;In Figure 11 Shown step 1103 and 1104 can be performed simultaneously;Step 1203 shown in Figure 12 and 1204 can be performed simultaneously, And step 1205 can be performed before step 1204;Step shown in step 1003 shown in Figure 10 and Figure 11 1103 can be split into two steps;Step 1203 shown in Figure 12 and 1205 can be merged into step etc..
In addition, features described above, structure or characteristic can be incorporated in any suitable manner it is one or more In embodiment.In the above description, many details are provided to fully understand the embodiment of the present invention to provide.So And it will be appreciated by persons skilled in the art that technical solution of the present invention can be practiced without one in specific detail or more It is more, or can be using other methods, constituent element, material etc..In other cases, be not shown in detail or describe known features, Material or operation are to avoid major technique intention of the invention is obscured.

Claims (14)

1. a kind of method for determining the blade balance situation of wind power generating set, which is characterized in that the wind-driven generator Group includes three blades, one strain of each setting at 0 °, 90 °, 180 ° and 270 ° of the section in each root of blade outer circle region Sensor, wherein 0 ° is leading edge locus, and 180 ° are posterior border position, and strain transducer detection is shimmy corresponding with waving to answer Become, which comprises
It monitors the hub height wind speed of the wind power generating set and carries out the hub height wind speed and predetermined wind speed threshold value Compare;
In the case where the hub height wind speed is less than or equal to the predetermined wind speed threshold value, at the impeller of wind power generating set In stationary state, three blades are zero waving with the pneumatic moment of flexure of edgewise direction, and blade bears gravity bending moment, to being arranged on The strain transducer on N number of blade in the wind power generating set is demarcated;And
In the case where the hub height wind speed is greater than the predetermined wind speed threshold value, impeller rotates under the action of the wind, blade By the superposition of gravity bending moment and aerodynamic moment, following steps are executed:
Obtain N number of blade strain parameter data corresponding with the strain of N number of blade in the wind power generating set respectively, institute N number of blade strain parameter data are stated respectively according to the strain data for passing through the collected N number of blade of the strain transducer It is calculated, N number of blade strain parameter data indicate the pneumatic moment of flexure that blade is born, and wherein N is whole more than or equal to 2 Number;
It calculates described in the combination each including two blade strain parameter data in N number of blade strain parameter data Any blade strain parameter data in the difference of two blade strain parameter data and described two blade strain parameter data Ratio, to obtainA ratio;And
By the ratio respectively compared with predetermined threshold, and when any ratio in the ratio is greater than the predetermined threshold When, determine that the wind power generating set is in blade non-equilibrium state.
2. the method according to claim 1, wherein
In the step of calculating the ratio, any blade strain parameter data in described two blade strain parameter data are Lesser blade strain parameter data in described two blade strain parameter data.
3. method according to claim 1 or 2, which is characterized in that further include:
The hub height wind speed of the wind power generating set is synchronously obtained with acquisition N number of blade strain parameter data;And And
When any ratio in the ratio is greater than the predetermined threshold, determine that the wind power generating set is high in the wheel hub It spends and is in blade non-equilibrium state under wind speed.
4. according to the method described in claim 3, it is characterized in that,
The step of obtaining the hub height wind speed includes that K hub height wind is obtained at K time point in scheduled time slot Speed, wherein K is the integer more than or equal to 1, and each hub height wind speed in the K hub height wind speed is categorized in In corresponding scheduled hub height wind speed interval;
The step of obtaining N number of blade strain parameter data includes for each blade in N number of blade, described pre- K blade strain parameter data are obtained at the K time point in timing section, and are directed to the scheduled hub height wind Fast section, calculate with all hub height wind speed for being sorted in the scheduled hub height wind speed interval synchronize be acquired The blade blade strain parameter data average value, as corresponding with the scheduled hub height wind speed interval The blade strain parameter data of the blade, to obtain the N corresponding with the scheduled hub height wind speed interval A blade strain parameter data;And
When any ratio in the ratio is greater than the predetermined threshold, determine the wind power generating set described scheduled Blade non-equilibrium state is in hub height wind speed interval.
5. according to the method described in claim 3, it is characterized in that,
The step of obtaining the hub height wind speed includes that the wind-driven generator is obtained at M time point in predetermined period M hub height wind speed of group, wherein M is the integer more than or equal to 1, and calculates being averaged for the M hub height wind speed Value is used as the hub height wind speed;And
The step of obtaining N number of blade strain parameter data includes for each blade in N number of blade, described pre- M blade strain parameter data corresponding with the blade are obtained at the M time point in timing section, and calculate institute Blade strain parameter data of the average value as the blade for stating M blade strain parameter data, to obtain N number of leaf Piece strain parameter data.
6. according to the method described in claim 4, it is characterized in that,
The step of obtaining the hub height wind speed includes the predetermined period of the day from 11 p.m. to 1 a.m of each of the K pre- sub-periods in predetermined period The M hub height wind speed with the wind power generating set is obtained at M time point in section, wherein M is whole more than or equal to 1 Number, and the average value of the M hub height wind speed is calculated as hub height wind corresponding with the pre- sub-period Speed, to obtain K hub height wind speed corresponding with the pre- sub-period of the K;And
The step of obtaining N number of blade strain parameter data includes for each blade in N number of blade, in the K M leaf corresponding with the blade is obtained at the M time point in the pre- sub-period of each of a pre- sub-period Piece strain parameter data, and calculate the average value of the M blade strain parameter data as with the pre- sub-period phase The blade strain parameter data of the corresponding blade, to obtain the blade corresponding with the pre- sub-period of the K K blade strain parameter data.
7. the method according to claim 1, wherein the blade strain parameter data include the moment of flexure number of blade According to.
8. a kind of system for determining the blade balance situation of wind power generating set, which is characterized in that the wind-driven generator Group includes three blades, one strain of each setting at 0 °, 90 °, 180 ° and 270 ° of the section in each root of blade outer circle region Sensor, wherein 0 ° is leading edge locus, and 180 ° are posterior border position, and strain transducer detection is shimmy corresponding with waving to answer Become, the system comprises:
Strain transducer caliberating device, for monitoring the hub height wind speed of the wind power generating set, and in the wheel hub In the case that height wind speed is less than or equal to predetermined wind speed threshold value, the impeller of wind power generating set remains static, three Zhi Ye Piece is zero waving with the pneumatic moment of flexure of edgewise direction, and blade bears gravity bending moment, to being arranged on the wind power generating set In N number of blade on strain transducer demarcated;
Blade strain parameter data acquisition facility is used in the case where the hub height wind speed is greater than predetermined wind speed threshold value, Rotated under the action of the wind in impeller, when blade is by the superposition of gravity bending moment and aerodynamic moment, obtain respectively with it is described The corresponding N number of blade strain parameter data of the strain of N number of blade in wind power generating set, N number of blade strain parameter Data are respectively according to the dependent variable by the collected N number of blade of the strain transducer being arranged on N number of blade According to being calculated, N number of blade strain parameter data indicate the pneumatic moment of flexure that blade is born, and wherein N is more than or equal to 2 Integer;
Blade strain parameter comparing device, for calculating each including two in N number of blade strain parameter data The difference of described two blade strain parameter data in the combination of blade strain parameter data and the strain of described two blades are joined The ratio of any blade strain parameter data in number data, to obtainA ratio;And
Blade balance situation determining device, for by the ratio respectively compared with predetermined threshold, and when in the ratio When any ratio is greater than the predetermined threshold, determine that the wind power generating set is in blade non-equilibrium state.
9. system according to claim 8, which is characterized in that
Any blade strain in the blade strain parameter comparing device, in described two blade strain parameter data Supplemental characteristic is the lesser blade strain parameter data in described two blade strain parameter data.
10. system according to claim 8 or claim 9, which is characterized in that further include:
Hub height wind speed acquisition device, for synchronously obtaining the wind-force with acquisition N number of blade strain parameter data The hub height wind speed of generating set, and the hub height wind speed is transferred to the blade balance situation determining device, and And
In the blade balance situation determining device, when any ratio in the ratio is greater than the predetermined threshold, institute It states blade balance situation determining device and determines that the wind power generating set is uneven in blade under the hub height wind speed State.
11. system according to claim 10, which is characterized in that
K hub height wind speed is obtained at the K time point of the hub height wind speed acquisition device in scheduled time slot, wherein K is integer more than or equal to 1, and each hub height wind speed in the K hub height wind speed is categorized in it is right with it In the scheduled hub height wind speed interval answered;
The blade strain parameter data acquisition facility is for each blade in N number of blade, in the predetermined period The K time point at obtain K blade strain parameter data, and for the scheduled hub height wind speed interval, Calculate with all hub height wind speed for being sorted in the scheduled hub height wind speed interval synchronize be acquired it is described The average value of the blade strain parameter data of blade, as the leaf corresponding with the scheduled hub height wind speed interval The blade strain parameter data of piece, to obtain N number of blade corresponding with the scheduled hub height wind speed interval Strain parameter data;And
In the blade balance situation determining device, when any ratio in the ratio is greater than the predetermined threshold, institute It states blade balance situation determining device and determines that the wind power generating set is in the scheduled hub height wind speed interval Blade non-equilibrium state.
12. system according to claim 10, which is characterized in that
The hub height wind speed acquisition device obtains the M of the wind power generating set at the M time point in predetermined period A hub height wind speed, wherein M is the integer more than or equal to 1, and calculates the average value conduct of the M hub height wind speed The hub height wind speed;And
The blade strain parameter data acquisition facility is for each blade in N number of blade, in the predetermined period The M time point at obtain corresponding with blade M blade strain parameter data, and calculate the M leaf Blade strain parameter data of the average value of piece strain parameter data as the blade, to obtain N number of blade strain Supplemental characteristic.
13. system according to claim 11, which is characterized in that
In the pre- sub-period of each of the K in predetermined period pre- sub-periods of the hub height wind speed acquisition device M hub height wind speed of the wind power generating set is obtained at M time point, wherein M is the integer more than or equal to 1, and The average value of the M hub height wind speed is calculated as hub height wind speed corresponding with the pre- sub-period, thus Obtain K hub height wind speed corresponding with the pre- sub-period of the K;And
The blade strain parameter data acquisition facility is for each blade in N number of blade, in the K predetermined period of the day from 11 p.m. to 1 a.m M blade strain parameter corresponding with the blade is obtained at the M time point in the pre- sub-period of each of section Data, and the average value of the M blade strain parameter data is calculated as corresponding with the pre- sub-period described The blade strain parameter data of blade, so that K blade for obtaining the blade corresponding with the pre- sub-period of the K is answered Variable element data.
14. system according to claim 8, which is characterized in that the blade strain parameter data include the moment of flexure of blade Data.
CN201611256077.0A 2016-12-29 2016-12-29 For determining the method and system of the blade balance situation of wind power generating set Active CN106704102B (en)

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CN201611256077.0A CN106704102B (en) 2016-12-29 2016-12-29 For determining the method and system of the blade balance situation of wind power generating set

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