CN104462703B - A kind of method and device for determining driftage driving design load - Google Patents
A kind of method and device for determining driftage driving design load Download PDFInfo
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- CN104462703B CN104462703B CN201410784231.6A CN201410784231A CN104462703B CN 104462703 B CN104462703 B CN 104462703B CN 201410784231 A CN201410784231 A CN 201410784231A CN 104462703 B CN104462703 B CN 104462703B
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Abstract
The invention provides a kind of method and device for determining driftage driving design load, applied to wind power generating set system, methods described includes：Determine the driftage wind load probability distribution of wind power generating set total life cycle；Carry out curve fitting acquisition driftage wind load accumulated probability density function curve to driftage wind load probability distribution；Driftage wind load maximum is determined using the intersection point of 6 σ probability lines and driftage wind load accumulated probability density function curve；It is determined that the yaw drive design load to match with driftage wind load maximum and the driftage brake torque obtained.Obtain 6 σ probability lines and the intersection point for wind load accumulated probability density function curve of going off course, suitable limit wind generating set yaw wind load is determined according to intersection point, suitable limit wind generating set yaw wind load is determined, and then effectively reduces the design cost of wind driven generator unit yaw system.
Description
Technical field
The present invention relates to wind power generating set System design technology field, determines that driftage is driven more specifically to one kind
The method and device of dynamic design load.
Background technology
The During yaw of wind power generating set is started by driftage soft initiator protection yaw motor, soft after startup to open
Dynamic device is bypassed, and is gone off course by motor protection switch yaw motor, and during the entire process of driftage, driftage brake provides one
Part holding torque is to maintain the stable of wind power generating set to go off course.The yaw drive of wind power generating set is wind-driven generator
Group realizes the pith of During yaw, therefore how effectively to realize that the yaw drive design to wind power generating set is mesh
Preceding urgent problem to be solved.
Yaw drive design load is the basis of Yaw drive for wind generating set design.At present, driven to driftage
During dynamic device design load, mainly basis is based on GL (Germanischer Lloyd)/IEC (International
Electrotechnical Commission) in design specification operating mode definition computer simulation is carried out to operating mode, obtain multiple wind
The driftage wind load charge values of power generator group, and maximum value conduct is chosen from the driftage wind load charge values of multiple wind power generating sets
The maximum of driftage wind load, determined partially according to the maximum of braked by driftage the driftage holding torque obtained and wind load of going off course
Boat driving design load, and then complete the Selection and Design to yaw drive.
Although existing driftage driving design method realizes the design requirement of yaw system, often due to limit wind-force
Generating set driftage wind load is larger and the number of generation is less, so that directly choosing the limiting value of wind power generating set load
Driftage driving design cost it is higher.
The content of the invention
In view of this, determine that driftage drives the method and device of design load it is an object of the invention to provide a kind of, to
Reduce the design cost of wind driven generator unit yaw system.
To achieve these goals, the present invention provides following technical scheme：
On the one hand, the invention provides a kind of method for determining driftage driving design load, applied to wind power generating set
System, including：
Determine the driftage wind load probability distribution of wind power generating set total life cycle；
The acquisition driftage wind load accumulated probability density function that carried out curve fitting to the driftage wind load probability distribution is bent
Line；
Driftage wind load is determined using 6 σ probability lines and the intersection point of the driftage wind load accumulated probability density function curve
Maximum；
It is determined that the yaw drive to match with the driftage wind load maximum and the driftage brake torque obtained designs
Load.
Preferably, it is described to determine driftage wind according to 6 σ probability lines and the driftage wind load accumulated probability density function curve
Maximal loading includes：
Obtain the 6 σ probability line and the first intersection point and second of the driftage wind load accumulated probability density function curve
Intersection point；
First intersection point and second intersection point are taken absolute value respectively；
Judge second intersection point whether first intersection point after taking absolute value is more than after taking absolute value, if
It is that the absolute value of first intersection point is then defined as maximum；If it is not, then the absolute value of second intersection point is defined as
Maximum.
Preferably, the driftage wind load probability distribution for determining wind power generating set total life cycle includes：
The normal distribution matched curve for wind load probability of happening of respectively being gone off course under different wind speed and different wind speed pair are obtained respectively
The probability distribution answered；
The driftage of wind power generating set total life cycle is determined using the normal distribution matched curve and the probability distribution
Wind load probability distribution.
Preferably, include before the normal distribution matched curve of each driftage wind load probability of happening under obtaining different wind speed：
Operating mode definition in design specification is simulated to operating mode, obtains multiple wind generating set yaw wind loads
Lotus.
Preferably, the driftage that the determination matches with the driftage wind load maximum and the driftage brake torque obtained
Driver design load includes：
The yaw drive design load is determined according to the following equation
TDrive the limit=TLimit wind load+THolding torque
In formula, TDrive the limitFor the maximum drive torque of yaw system design, TLimit wind loadFor the limit for operating condition of going off course
Wind load, THolding torqueFor the driftage brake torque overcome during yawing rotation.
On the other hand, the invention provides a kind of device for determining driftage driving design load, applied to wind-driven generator
System is united, including：
First determining unit, for determining the driftage wind load probability distribution of wind power generating set total life cycle；
Acquiring unit, it is accumulative general for the acquisition driftage wind load that carried out curve fitting to the driftage wind load probability distribution
Rate density function curve；
Second determining unit, for using 6 σ probability lines and the friendship of the driftage wind load accumulated probability density function curve
Point determines driftage wind load maximum；
3rd determining unit, for determining to match with the driftage wind load maximum and the driftage brake torque obtained
Yaw drive design load.
Preferably, second determining unit includes：
First acquisition unit, for obtaining the 6 σ probability line and the driftage wind load accumulated probability density function curve
The first intersection point and the second intersection point；
Computing unit, for being taken absolute value respectively to first intersection point and second intersection point；
Judging unit, for judge take absolute value after first intersection point whether be more than take absolute value after described in
Second intersection point, if it is, the absolute value of first intersection point is defined as into maximum；If it is not, then by second intersection point
Absolute value be defined as maximum.
Preferably, first determining unit includes：
Second acquisition unit, for obtaining the normal distribution fitting of respectively driftage wind load probability of happening under different wind speed respectively
Probability distribution corresponding to curve and different wind speed；
4th determining unit, for determining wind-driven generator using the normal distribution matched curve and the probability distribution
The driftage wind load probability distribution of group total life cycle.
Preferably, described device also includes：
3rd acquiring unit, for being simulated to operating mode definition in design specification to operating mode, obtain multiple wind-force
Generating set driftage wind load.
Preferably, the 3rd determining unit includes：
5th determining unit, for determining the yaw drive design load according to the following equation
TDrive the limit=TLimit wind load+THolding torque
In formula, TDrive the limitFor the maximum drive torque of yaw system design, TLimit wind loadFor the limit for operating condition of going off course
Wind load, THolding torqueFor the driftage brake torque overcome during yawing rotation.
Compared with prior art, advantages of the present invention is as follows：
A kind of method for determining driftage driving design load provided by the invention, obtain 6 σ probability lines and tire out with driftage wind load
The intersection point of probability density function curve is counted, suitable limit wind generating set yaw wind load is determined according to intersection point, it is and existing
In technology limit wind generating set yaw wind load it is larger and occur number it is less compare, it is provided by the invention determine driftage
The method of driving design load determines suitable limit wind generating set yaw wind load, and then effectively reduces wind-force
The design cost of generating set yaw system.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of a kind of flow chart of method for determining driftage driving design load provided in an embodiment of the present invention；
Fig. 2 is a kind of another flow chart of method for determining driftage driving design load provided in an embodiment of the present invention；
Fig. 3 is a kind of a kind of flow chart of method for determining driftage driving design load provided in an embodiment of the present invention；
Fig. 4 is the normal distribution matched curve figure of driftage wind load under some a kind of wind speed provided in an embodiment of the present invention；
Fig. 5 is a kind of exemplary accumulation probability density function curve map provided in an embodiment of the present invention；
Fig. 6 is a kind of a kind of structural representation of device for determining driftage driving design load provided in an embodiment of the present invention
Figure；
Fig. 7 is a kind of kernel texture signal of device for determining driftage driving design load provided in an embodiment of the present invention
Figure；
Fig. 8 is that a kind of another kernel texture of device for determining driftage driving design load provided in an embodiment of the present invention shows
It is intended to；
Fig. 9 is that a kind of mean wind speed provided in an embodiment of the present invention is 6m/s and 12m/s driftage wind load curve map；
Figure 10 is each driftage wind load probability that a kind of normal distribution provided in an embodiment of the present invention is fitted under different wind speed
Densogram；
Figure 11 is Weibull distribution curve map corresponding to a kind of different wind speed provided in an embodiment of the present invention；
Figure 12 is a kind of driftage load probability distribution curve of 2MW Wind turbines total life cycle provided in an embodiment of the present invention
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The yaw system of Large-scale Wind Turbines, generally it is made up of machinery and packing ring two parts, mechanical part mainly wraps
Containing yaw, yaw brake disc, Yaw gearbox, electrical appliance part then has yaw motor, soft initiator, motor protection switch,
Wherein, yaw drive is made up of yaw motor and Yaw gearbox.The embodiment of the present invention is to be applied to wind-driven generator
The determination of the foundation that yaw drive designs in system system, i.e. driftage driving design load.
It is to meet the needs of Wind turbines are to wind so as to lift wind-force in the yaw drive design of wind power generating set
Generating set generated energy is target, and meets the security requirement of wind driven generator unit yaw system, because yaw drive is set
Meter load is the basis of Yaw drive for wind generating set design, so selecting suitable yaw drive load to seem particularly
It is important.
Fig. 1 is refer to, it illustrates a kind of method for determining driftage driving design load provided in an embodiment of the present invention
A kind of flow chart, applied to wind power generating set system, it may comprise steps of：
Step 101：Determine the driftage wind load probability distribution of wind power generating set total life cycle.
Step 102：Carry out curve fitting acquisition driftage wind load accumulated probability density letter to driftage wind load probability distribution
Number curve.
Step 103：Driftage wind is determined using the intersection point of 6 σ probability lines and driftage wind load accumulated probability density function curve
Maximal loading.
Step 104：It is determined that the yaw drive to match with driftage wind load maximum and the driftage brake torque obtained
Design load.
The embodiment of the present invention chooses most suitable driftage wind load maximum using 6 σ concepts, while considers wind
Distribution and load characteristic, the driftage wind load probability distribution of wind power generating set total life cycle is carried out curve fitting, and is obtained and is intended
The intersection point of curve and 6 σ probability lines is closed, in order to which driftage wind load is designed in suitable scope, and meanwhile it is larger partially in wind speed
In the case that the wind load that navigates exceeds design load, not going off course for wind power generating set is kept, method provided in an embodiment of the present invention,
It not only can guarantee that the safe and can of yaw system greatly reduces the cost of driftage driving design.
A kind of method for determining driftage driving design load provided by the invention, obtain 6 σ probability lines and tire out with driftage wind load
The intersection point of probability density function curve is counted, suitable limit wind generating set yaw wind load is determined according to intersection point, it is and existing
In technology limit wind generating set yaw wind load it is larger and occur number it is less compare, it is provided by the invention determine driftage
The method of driving design load determines suitable limit wind generating set yaw wind load, and then effectively reduces wind-force
The design cost of generating set yaw system.
Fig. 2 is refer to, it illustrates a kind of method for determining driftage driving design load provided in an embodiment of the present invention
Another flow chart, may comprise steps of：
Step 201：Operating mode definition in design specification is simulated to operating mode, obtains multiple wind generating set yaw wind
Load.
Step 202：The respectively normal distribution matched curve of driftage wind load probability of happening and not is obtained under different wind speed respectively
With probability distribution corresponding to wind speed.
Step 203：The driftage of wind power generating set total life cycle is determined using normal distribution matched curve and probability distribution
Wind load probability distribution.
Step 204：Carry out curve fitting acquisition driftage wind load accumulated probability density letter to driftage wind load probability distribution
Number curve.
Step 205：Driftage wind is determined using the intersection point of 6 σ probability lines and driftage wind load accumulated probability density function curve
Maximal loading.
Step 206：It is determined that the yaw drive to match with driftage wind load maximum and the driftage brake torque obtained
Design load.
In the embodiment of the present invention, the factors such as distribution and the load characteristic of wind are considered, determined according to 6 σ probable ranges inclined
Maximum wind load T during shipping row under working conditionWind load.It is primarily based on the LOAD FOR that operating mode defines in GL/IEC design specifications
Method, the load calculation method in being defined to operating mode carry out computer simulation, calculate the driftage wind load of wind power generating set.
Generally, same wind speed VnIn the case of the probability approximation that is occurred of different driftage wind load meet that normal distribution is advised
Rule, therefore can be according to same wind speed VnIn the case of different driftage wind load a situation arises carries out data statistics.
According to the driftage wind load for the wind-driven generator being calculated, each driftage wind load obtained under different wind speed occurs
Probability is：
Formula (1) is carried out curve fitting, can obtain same wind speed VnIn the case of different driftage wind loads probability it is bent
Line and probable value, as shown in Figure 3.
Calculate simultaneously and determine probability distribution corresponding to different wind speed, wherein for wind speed VnCorresponding Weibull distribution probability
F(Vn), typical curve is as shown in figure 4, be specifically calculated as follows：
F(Vn)=1-exp [- (V/C)k]
Or
Γ (x) is Gamma functions in formula, VaveFor annual mean wind speed, σVFor standard deviation.
The driftage wind load probability distribution P of wind power generating set total life cycle can be calculated in convolution (1) and (2),
Determined by following formula：
P=F (V1=Vcut-in)×p1+F(V2=Vcut-in+1)×p2
+F(V3=Vcut-in+2)×p3...+F(Vn=Vcut-out)×pn (3)
Wherein F (Vn) it is wind speed VnCorresponding Weibull wind speed profile probability, pnFor wind speed VnIn the case of different driftage wind
The probability that load is occurred.
Probability distribution corresponding to can obtaining different yaw direction load is calculated according to formula (3), can after curve matching
To obtain accumulated probability density function curve, as shown in Figure 4.
It should be noted that 6 σ refer to by measuring, analyzing and controlling influence of the uncertain factor to product quality, so as to
The probability of qualified products is brought up into 6 σ levels.It is same as determining the maximum of optimal driftage wind load in embodiments of the present invention
Value.
Consider according to 6 σ probability, i.e., probability of happening is 0.00003, takes 6 σ probability lines and accumulated probability density function curve
Intersection point, determining maximum is as TConsider the driftage wind load of probability, TConsider the driftage wind load of probabilityInstead of T in formula (1)Limit wind load, then calculated by following formula
Obtain yaw drive design load：
TDrive the limit=TLimit wind load+THolding torque (4)
In formula, TDrive the limitFor the maximum drive torque of yaw system design, TLimit wind loadFor the limit for operating condition of going off course
Wind load, THolding torqueFor the driftage brake torque overcome during yawing rotation.
It is determined that after the maximum of Wind turbines driftage wind load, stopped with reference to the driftage by being obtained in brake process of going off course
Car torque, maximum drive torque that can be according to required for formula (4) obtain yaw system.On this basis, wind-force can be realized
The Selection and Design of generating set driftage wind load driver, wherein, the Selection and Design of driftage wind load driver can be under
Formula is realized：
TDriftage driving design load=TYaw motor stall torque×n×i×e×η1×η2 (5)
N is yaw motor number in formula, and i is Yaw gearbox gearratio, and e is gear reduction ratio at yaw, η1For
Yaw gearbox transmission efficiency, η2For yaw gear efficiency.
It should be noted that yaw drive load need to meet the superposition demand of wind load and holding torque of going off course, wherein
Holding torque of going off course is provided by driftage brake (being usually hydraulic system), is generally definite value, and wind driven generator yaw
Wind load is random and often increased with the increase of wind speed.It is determined that after yaw drive design load, by formula (5) Lai
Suitable yaw motor and Yaw gearbox speed ratio is selected, to complete the Selection and Design of yaw drive.
Fig. 5 is refer to, it illustrates a kind of method for determining driftage driving design load provided in an embodiment of the present invention
Another flow chart, may comprise steps of：
Step 301：Obtain 6 σ probability lines and the first intersection point and second for wind load accumulated probability density function curve of going off course
Intersection point.
It should be noted that the 6 σ probability lines obtained generally there are two with driftage wind load accumulated probability density function curve
Individual intersection point, wherein, one is orthogonal points, is designated as the first intersection point, and one is negative intersection point, is designated as the second intersection point.The embodiment of the present invention
The method of offer is used to determine the larger point of an absolute value from the positive and negative intersection point in left and right two, using as driftage wind load most
Big value.
Step 302：The first intersection point and the second intersection point are taken absolute value respectively.
Two intersection points are taken absolute value, after taking absolute value, the determining maximum from two values.
Step 303：Judge the second intersection point whether the first intersection point after taking absolute value is more than after taking absolute value, if
It is then to perform step 304；If it is not, then perform step 305.
Step 304：The absolute value of first intersection point is defined as maximum.
Step 305：The absolute value of second intersection point is defined as maximum.
It should be noted that the maximum determined can be the first intersection point, or the second intersection point, but it belongs to both
The value of middle maximum absolute value, to determine the maximum of driftage wind load, suitable limit wind load is selected, on this basis, also
The design to Yaw drive for wind generating set can be realized.
It is corresponding with the embodiment of the above method, determine that driftage drives design load the embodiments of the invention provide a kind of
A kind of structural representation of device, refer to Fig. 6, including：First determining unit 11, acquiring unit 12, the second determining unit 13
With the 3rd determining unit 14, wherein：
First determining unit 11, for determining the driftage wind load probability distribution of wind power generating set total life cycle.
Wherein, Fig. 7 is refer to, the first determining unit 11 can also include：3rd acquiring unit 21, second acquisition unit 22
With the 4th determining unit 23, wherein：
3rd acquiring unit 21, for being simulated to operating mode definition in design specification to operating mode, obtain multiple wind-force hairs
Group of motors driftage wind load.
Due to operating mode being defined in the design specification for GL/IEC of being eager, multiple operating modes be present, you can with by right
The details of operating mode carry out computer simulation, can obtain the load of wind generating set yaw wind load in varied situations
Lotus.
Second acquisition unit 22, for obtaining respectively, respectively the normal distribution of driftage wind load probability of happening is intended under different wind speed
Close probability distribution corresponding to curve and different wind speed.
Because significant impact be present in design of the distribution to wind generating set yaw wind load of wind, so, in order to obtain
More accurate load value, it is determined that introducing the factors such as the distribution of wind during driftage wind load, similarly, it is also desirable to will carry
The characteristic attribute of lotus is considered it is determined that in the claimed range of driving wind load.
4th determining unit 23, for determining the wind power generating set full longevity using normal distribution matched curve and probability distribution
The driftage wind load probability distribution of life phase.
Pass through the probability just too corresponding to fitting of distribution and different wind speed of each driftage wind probability of happening under different wind speed
Distribution determines the driftage wind load probability distribution of wind power generating set total life cycle, to realize distribution and load characteristic to wind etc.
The introducing of influence factor.
Acquiring unit 12, for the acquisition driftage wind load accumulated probability that carried out curve fitting to driftage wind load probability distribution
Density function curve.
Second determining unit 13, for using 6 σ probability lines and the intersection point for wind load accumulated probability density function curve of going off course
It is determined that driftage wind load maximum.
Wherein, Fig. 8 is refer to, the second determining unit 13 can also include：First acquisition unit 31, computing unit 32 and sentence
Disconnected unit 33, wherein：
First acquisition unit 31, for obtaining the first of 6 σ probability lines and driftage wind load accumulated probability density function curve
Intersection point and the second intersection point.
Computing unit 32, for being taken absolute value respectively to the first intersection point and the second intersection point.
Judging unit 33, for judging whether the first intersection point after taking absolute value is more than the second friendship after taking absolute value
Point, if it is, the absolute value of the first intersection point is defined as into maximum；If it is not, then the absolute value of the second intersection point is defined as
Maximum.
The first intersection point after taking absolute value and the second intersection point are compared, an intersection value larger in both is made
For the maximum for wind load of going off course.
3rd determining unit 14, what the driftage brake torque for determine and go off course wind load maximum and acquisition matched
Yaw drive design load.
Wherein, the 3rd determining unit 14 can also include the 5th determining unit 141, wherein：
5th determining unit 141, for determining yaw drive design load according to the following equation
TDrive the limit=TLimit wind load+THolding torque
In formula, TDrive the limitFor the maximum drive torque of yaw system design, TLimit wind loadFor the limit for operating condition of going off course
Wind load, THolding torqueFor the driftage brake torque overcome during yawing rotation.
A kind of device for determining driftage driving design load provided by the invention, obtain 6 σ probability lines and tire out with driftage wind load
The intersection point of probability density function curve is counted, suitable limit wind generating set yaw wind load is determined according to intersection point, it is and existing
In technology limit wind generating set yaw wind load it is larger and occur number it is less compare, it is provided by the invention determine driftage
The device of driving design load determines suitable limit wind generating set yaw wind load, and then effectively reduces wind-force
The design cost of generating set yaw system.
On the basis of a kind of method and device for determining driftage driving design load provided in an embodiment of the present invention,
It is applied in 2MW wind power generating sets, the main models parameter of the wind-driven generator is shown in Table 1.
Table 1
| Title | Numerical value | Unit |
| Rotor diameter | 120 | m |
| Driftage brake torque in During yaw | 1200 | kNm |
| Design annual mean wind speed | 7.5 | m/s |
| Weibull distribution parameters | 2 | - |
| Yaw gearbox transmission efficiency | 0.92 | - |
| Yaw gear efficiency | 0.98 | - |
| Yaw gearbox speed reducing ratio | 1388 | - |
| Speed reducing ratio at yaw gear | 134/14 | - |
| 5.5kW yaw motor limit driving moments | 88 | Nm |
| 6 σ probability | 0.00003 | - |
| Cut wind speed | 3 | m/s |
| Cut-out wind speed | 22 | m/s |
Load simulation calculation is carried out to 2MW wind power generating sets, obtains the typical driftage wind load curve shown in Fig. 9,
According to the method for prior art, the wind generating set yaw wind load for taking maximum is 4026kNm, and corresponding wind speed is 22m/s, is examined
Consider the driftage brake torque 1200kNm in During yaw, be then 5226kNm according to the design load of formula (4) yaw drive,
According to formula (5), yaw drive number is：
N=5226 × ÷ the 88=4.96 of 1000 ÷ (134/14) 0.92 ÷ of ÷ 0.98
So arrangement 5 is needed to meet to require according to yaw drive needed for method of the prior art.
According to method provided by the invention, each driftage wind load probability of happening under different wind speed is fitted according to normal distribution
Curve is as shown in Figure 10, and it is as shown in figure 11 to be then calculated Weibull distribution curve corresponding to different wind speed, according to formula (3)
The driftage load probability distribution curve that wind-powered electricity generation wind power generating set total life cycle can be obtained is as shown in figure 12.
Consider by 6 σ probability, take the driftage load probability curve of 6 σ probability and wind-powered electricity generation wind power generating set total life cycle to hand over
Point, it is 2816kNm to obtain maximum yaw wind load charge values, and being calculated using formula (4) and (5) is had：
The ÷ 88=3.81 of n=(2816+1200) × 1000 ÷ (134/14) 0.92 ÷ of ÷ 0.98
So it need to arrange that 4 can meet to require according to yaw drive needed for method provided by the invention.
For a 50000 kW wind power plants, the influence simply estimation of 20 annual electricity generating capacities has 0.00003 (6 σ probability) * 2000 (full
Send out hourage) * 50000 (wind power plant completely sends out power) * 0.63 (rate for incorporation into the power network) * 2 (driftage total time is generally in terms of 2 years)<5000
Member, and reducing for the input cost of wind power generating set, 25 (25 2MW wind power generating sets) * 3 (1 yaw drive
Cost)=750,000 yuan, the method for middle use, method provided by the invention substantially reduce cost of investment, carried compared with prior art
High economy.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of elements not only include that
A little key elements, but also the other element including being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except other identical element in the process including the key element, method, article or equipment being also present.
The foregoing description of the disclosed embodiments, those skilled in the art are enable to realize or using the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and generic principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
The embodiments shown herein is formed on, and is to fit to consistent with principles disclosed herein and features of novelty most wide
Scope.
Claims (10)
- A kind of 1. method for determining driftage driving design load, applied to wind power generating set system, it is characterised in that including：Determine the driftage wind load probability distribution of wind power generating set total life cycle；Carry out curve fitting acquisition driftage wind load accumulated probability density function curve to the driftage wind load probability distribution；Use 6σProbability line and the intersection point of the driftage wind load accumulated probability density function curve determine that driftage wind load is maximum Value；It is determined that the yaw drive design load to match with the driftage wind load maximum and the driftage brake torque obtained.
- 2. according to the method for claim 1, it is characterised in that described according to 6σProbability line adds up with the driftage wind load Probability density function curve determines that driftage wind load maximum includes：Obtain described 6σProbability line and the first intersection point and the second intersection point of the driftage wind load accumulated probability density function curve；First intersection point and second intersection point are taken absolute value respectively；Judge whether the value of first intersection point after taking absolute value is more than the value of second intersection point after taking absolute value, If it is, the absolute value of first intersection point is defined as maximum；It is if it is not, then the absolute value of second intersection point is true It is set to maximum.
- 3. according to the method for claim 1, it is characterised in that the driftage wind for determining wind power generating set total life cycle Load probability distribution includes：Obtain respectively corresponding to normal distribution matched curve and the different wind speed for wind load probability of happening of respectively being gone off course under different wind speed Probability distribution；The driftage wind load of wind power generating set total life cycle is determined using the normal distribution matched curve and the probability distribution Lotus probability distribution.
- 4. according to the method for claim 3, it is characterised in that each driftage wind load probability of happening in the case where obtaining different wind speed Normal distribution matched curve before include：To being simulated based on operating mode definition in GL/IEC design specifications to operating mode, multiple wind generating set yaws are obtained Wind load.
- 5. according to the method for claim 1, it is characterised in that the determination and the driftage wind load maximum and acquisition The yaw drive design load that matches of driftage brake torque include：The yaw drive design load is determined according to the following equationTDrive the limit=TLimit wind load+THolding torqueIn formula, TDrive the limitFor the maximum drive torque of yaw system design, TLimit wind loadFor the limit wind load for operating condition of going off course Lotus, THolding torqueFor the driftage brake torque overcome during yawing rotation.
- A kind of 6. device for determining driftage driving design load, applied to wind power generating set system, it is characterised in that including：First determining unit, for determining the driftage wind load probability distribution of wind power generating set total life cycle；Acquiring unit, it is close for the acquisition driftage wind load accumulated probability that carried out curve fitting to the driftage wind load probability distribution Spend function curve；Second determining unit, for using 6σProbability line and the intersection point of the driftage wind load accumulated probability density function curve are true Surely driftage wind load maximum；3rd determining unit, the driftage brake torque for determination and the driftage wind load maximum and acquisition match inclined Boat driver design load.
- 7. device according to claim 6, it is characterised in that second determining unit includes：First acquisition unit, for obtaining described 6σProbability line and the of the driftage wind load accumulated probability density function curve One intersection point and the second intersection point；Computing unit, for being taken absolute value respectively to first intersection point and second intersection point；Judging unit, for judge take absolute value after first intersection point value whether be more than take absolute value after described in The value of second intersection point, if it is, the absolute value of first intersection point is defined as into maximum；If it is not, then by described second The absolute value of intersection point is defined as maximum.
- 8. device according to claim 6, it is characterised in that first determining unit includes：Second acquisition unit, for obtaining the respectively normal distribution matched curve of driftage wind load probability of happening under different wind speed respectively With different wind speed corresponding to probability distribution；4th determining unit, for determining that wind power generating set is complete using the normal distribution matched curve and the probability distribution The driftage wind load probability distribution of lifetime.
- 9. device according to claim 8, it is characterised in that described device also includes：3rd acquiring unit, for being simulated based on operating mode definition in GL/IEC design specifications to operating mode, obtaining multiple institutes State wind generating set yaw wind load.
- 10. device according to claim 6, it is characterised in that the 3rd determining unit includes：5th determining unit, for determining the yaw drive design load according to the following equationTDrive the limit=TLimit wind load+THolding torqueIn formula, TDrive the limitFor the maximum drive torque of yaw system design, TLimit wind loadFor the limit wind load for operating condition of going off course Lotus, THolding torqueFor the driftage brake torque overcome during yawing rotation.
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| CN111734585B (en) * | 2020-06-18 | 2023-06-27 | 上海电气风电集团股份有限公司 | Method and device for determining limit load of wind driven generator and readable storage medium |
| CN112528504B (en) * | 2020-12-14 | 2022-07-05 | 中国船舶重工集团海装风电股份有限公司 | Wind turbine generator fatigue load calculation method based on turbulent flow distribution |
| CN113536469B (en) * | 2021-08-03 | 2023-10-10 | 中国航空工业集团公司沈阳飞机设计研究所 | Output torque calculation method of driving device |
| CN115983054B (en) * | 2023-03-21 | 2023-08-11 | 中车山东风电有限公司 | Capability assessment and load processing method for wind generating set and terminal |
| CN116335878B (en) * | 2023-05-17 | 2023-09-19 | 中车山东风电有限公司 | Reverse slip control method and control terminal for wind turbine generator during off-plane operation |
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