CN105896617B - It is a kind of meter and the active active control of wind turbine wind-powered electricity generation adjust spare capacity appraisal procedure - Google Patents
It is a kind of meter and the active active control of wind turbine wind-powered electricity generation adjust spare capacity appraisal procedure Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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- H02J3/386—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The invention discloses the wind-powered electricity generations of a kind of meter and the active active control of wind turbine to adjust spare capacity appraisal procedure.This method is obtained by the way of based on wind power plant history output data statistics first can meet smooth wind power field under certain confidence level and contribute the wind power plant basis spare capacity of upper and lower fluctuating demand；Further, wind field frequency regulation capacity Optimized model is established in the case where considering the operation control of wind turbine level load shedding；Finally, the wind field basis spare capacity of acquisition is modified using wind power plant frequency regulation capacity, obtains the assessment result of entire wind power plant spare capacity.The invention is intended to consider under wind turbine real power control strategy, gives full play to the fm capacity that wind-powered electricity generation participates in system, reduce the spare capacity needed for wind power plant as far as possible under the premise of ensureing system reliability, and then reduce stand-by cost, improve the economy of system operation.Effective reference frame that corresponding assessment result can be configured as system call and wind power plant spare capacity.
Description
Technical field
The present invention relates to a kind of wind power plant spare capacity appraisal procedures, more particularly, to a kind of meter and the active active control of wind turbine
The wind-powered electricity generation of system adjusts spare capacity appraisal procedure.
Background technology
With being continuously increased for electric system wind-powered electricity generation permeability, the intrinsic intermittence of wind-powered electricity generation, fluctuation and anti-tune peak character
Etc. the critical problem for having become obstruction Wind Power Development.Therefore it needs to provide enough spare capacities for wind power plant to participate in wind-powered electricity generation
Frequency when grid-connected is adjusted.But in view of the high permeability of wind-powered electricity generation, traditional thermoelectricity, water power are arranged in a manner of a kind of economy
Unit reserve is to greatly develop wind-powered electricity generation to solve the problems, such as.On the other hand, quick with the active active control technology of wind turbine
Development, some wind power generating sets have been able to participate in the system frequency modulation of different stage.Therefore wind power generating set provides system
The potentiality of frequency modulation are increasingly paid attention to by power industry and researchers.
Traditionally, the spare fluctuation for smoothing power load of operation of electric system is lost with meeting any system component
Needs in the case of effect.According to the length of action time, spare be divided into primary spare (in 30s), secondary can will be usually run
Spare (10~15min) and three is spare (hour rank).
The technical specification grid-connected according to Wind Power In China, wind field operator need to submit wind-powered electricity generation prediction to Systems Operator in advance
Curve, corresponding Systems Operator, which will realize, arranges additional spare capacity to solve the problems, such as that the uncertainty of wind-powered electricity generation is brought,
To maintain the stabilization of system load flow.Therefore, it is necessary to the spare capacities adjusted above and below to compensate the practical output of wind-powered electricity generation and prediction curve
Upper and lower deviation.To give full play to the fm capacity that wind-powered electricity generation participates in system, it is standby to obtain more accurate wind power plant wind-powered electricity generation adjusting
With capacity evaluating method, the invention discloses the wind-powered electricity generations of a kind of meter and the active active control of wind turbine to adjust spare capacity assessment side
Method.
Invention content
To solve the above problems, invention herein proposes a kind of meter and the wind-powered electricity generation of the active active control of wind turbine adjusts spare appearance
Appraisal procedure is measured, the spare capacity needed for wind power plant is quantitatively sought.
Technical scheme of the present invention uses following steps：
1) it is based on historical data statistics and entry evaluation is carried out to wind power plant basis spare capacity；
2) to wind turbine frequency modulation control strategy modeling；
3) consider the active active control strategies of wind turbine, wind field frequency regulation capacity is assessed；
4) consider wind field frequency regulation capacity, establish wind-powered electricity generation and adjust spare capacity correction model, to the wind of step 1) entry evaluation
Electricity adjusts spare capacity and is modified.
In above-mentioned technical proposal, the step 1) is standby based on the spare up/down tune in wind power plant basis that historical data counts
With capacity R+/R-Assessment is obtained using following formula：
P+=max { Pi}-avg{Pi}
P-=avg { Pi}-min{Pi}
Wherein, PiFor the wind power plant history output data time series of acquisition；P+For wind power output maximum value in per hour with
The difference of average value；P-For the difference of interior wind power output average value and minimum value per hour；I.e.：P+/P-It indicates to go out with interior wind-powered electricity generation per hour
When power average value is reference value, interior wind power output up/down fluctuation per hour is to greatest extent；Indicate discrete standardization
Up/down tune spare capacity value is manually set according to the practical output situation of wind field；Indicate statistics wind power plant year output number
The P to greatest extent that interior wind power output up/down fluctuates per hour in+/P-It is no more thanProbability；λ+/λ-Indicate smooth wind
The confidence level of electro-mechanical wave, depending on the demand that wind field is contributed；R+/R-Indicate the wind power plant basis counted based on historical data
Spare up/down capacity is probabilityNot less than confidence level λ+/λ-Under the premise of select discrete normalized up/down tune it is spare
CapacityMinimum value.
Step 2) the wind turbine frequency modulation control strategy modeling is specifically described as：
1. closing award setting under normal circumstances, wind turbine maintenance operates in load shedding operating point P0；
2. when needing to raise spare, fan operation state is from load shedding operating point P0It is moved to maximal power tracing point MPPT
Point increases wind turbine and contributes to reduce downward fluctuation；
3. when needing to lower spare, start award setting, is further reduced wind turbine and contributes to reduce upward fluctuation.
The step 3) considers the wind field up/down frequency regulation capacity Δ R of the active active control strategies of wind turbine+/ΔR-Assessment side
Method is as follows：
ΔR+=PMPPT-P0=Kr·PMPPT
ΔR-=P0-Pm(β)
ΔR+/ΔR-=R+/R-
Wherein, PMPPTPower output when being run with maximum power for wind turbine, Pm(β) is that wind turbine load shedding runs power output.
Preceding two formula indicates to consider the correction value of the upper and lower frequency regulation capacity of rotor speed control and award setting, they respectively with amendment
Preceding basic spare capacity is proportional.The Aerodynamics Model of wind power generating set is described below：
1/λi=1/ (λ -0.02 β) -0.003/ (1+ β3)
λ=ωrR/vw
Wherein, KrFor the equivalent coefficient of frequency regulation capacity, i.e. the load shedding ratio of wind turbine load shedding operation；P0It is steady for wind power generating set
Power output when state is run；λ and β indicates the tip speed ratio and propeller pitch angle of wind turbine；ρ indicates that atmospheric density, A indicate that blade scans
Area, ωrIndicate fan rotor rotation speed；R indicates fan blade radius, vwIndicate wind speed.
Constraints：
Fan rotor rotation speed constrains：
Propeller pitch angle adjustable range constrains：0≤β≤βmax
Load shedding is than constraint：
Wherein, fan rotor rotation speed constraint is arranged by wind turbine technical specification, and propeller pitch angle adjustable range and load shedding are than constraint root
It is arranged according to experience.
The step 4) considers that the wind-powered electricity generation of wind field frequency regulation capacity adjusts the correction model of spare capacity with the following method
It establishes：
Wherein,Indicate that the frequency regulation capacity for considering to provide under the active active control of wind turbine adjusts up/down for wind-powered electricity generation
Adjust the revised value of spare capacity.
The beneficial effects of the invention are as follows：
The present invention is directed to consider under wind turbine real power control strategy, the fm capacity that wind-powered electricity generation participates in system is given full play to, is being protected
The spare capacity needed for wind power plant is reduced under the premise of card system reliability as far as possible, and then reduces stand-by cost, improves system
The economy of operation.Corresponding assessment result can be used as that system call and wind power plant spare capacity configure it is effective refer to according to
According to.
Description of the drawings
Fig. 1 up/down tune basis spare capacity assesses schematic diagram；
Fig. 2 is the spare capacity probability statistics figure of a certain period；
Fig. 3 rotating speeds control and award setting synergetical principle figure；
Fig. 4 00:00-01:00 period wind field lowers basic spare capacity probability column diagram；
Wind field day part up/down tune spare capacity under Fig. 5 difference confidence levels.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment invention is further described in detail.
The method of the present invention includes the following steps：
1) it is based on historical data statistics and entry evaluation is carried out to wind power plant basis spare capacity；
2) wind turbine frequency modulation control strategy modeling；
3) consider the active active control strategies of wind turbine, wind field frequency regulation capacity is assessed；
4) consider wind field frequency regulation capacity, establish wind-powered electricity generation and adjust spare capacity correction model, to wind power plant basis spare capacity
It is modified.
The spare up/down capacitance-adjustable R in wind power plant basis based on historical data statistics in the step 1)+/R-Assessment tool
Body is as follows：
Fig. 1 and Fig. 2 is given the wind power plant basis spare capacity counted based on historical data and assesses principle.Wind power plant
It is P that SCADA, which periodically acquires output data time series,i, the lower label of wherein i expression data.The whole year is gone out into force data
24 periods were divided into for time interval, in each period, can count being averaged of contributing in this period by 1 hour
Value and maximum/small value, and when using wind power output average value as reference value, wind power output up/down fluctuates in each period
P to greatest extent+/P-.Under normal circumstances, it is assumed that there is relatively stable statistical property to be reasonable for wind-powered electricity generation fluctuation, therefore can draw
The probability curve of up/down tune spare capacity is as shown in Figure 2 in day part.In Fig. 2, table 1,...,Table respectively
Show discrete standardization up/down tune spare capacity value, is manually set according to the practical output situation of wind field.For it is given it is upper/
Lower spare capacityThe maximum up/down fluctuation limit P of wind field output+/P-It is no more thanProbabilityIt can be with
Day part probability statistics curve according to fig. 2 is found out.As the confidence level λ of given smooth wind power fluctuation+/λ-When, mutually in requisition for
The horizontal R of up/down tune spare capacity+/R-Also it can be obtained by probability statistics curve.
The spare up/down tune spare capacity R+/R- assessments in wind power plant basis based on historical data statistics can use following steps
It obtains：
1. the force data that goes out in the whole year was divided into 24 periods by 1 hour for time interval；
2. in each period, counting the P to greatest extent of wind power output up/down fluctuation as follows+/P-, and obtain as
Day part spare capacity probability statistics table shown in table 1；
P+=max { Pi}-avg{Pi}
P-=avg { Pi}-min{Pi}
1 up/down tune basis spare capacity probability statistics of table illustrate table
3. for each period, the up/down tune spare capacity of wind power plant each period is found out according to fig. 2 and as the following formula.
Step 2) the wind turbine frequency modulation control strategy modeling is described in detail below:
The active active control strategies of wind turbine include that the short-time overload discharged based on rotation function is run, current transformer crosses carrying
Row and load shedding operation etc..Present invention contemplates that wind power plant two/assessment of spare capacity three times, dimension only considers to include rotor
Rotating speed controls and the load shedding of award setting runs control strategy.Load shedding operation control strategy is that wind turbine is instigated to deviate maximum work
Rate tracks the operation of (Maximum Power Point Tracking, MPPT) point, certain spare to be provided for system frequency modulation
Capacity.Load shedding operation control includes rotor speed control and award setting two ways.Wherein, rotor speed control changes
It is power of fan aircraft pursuit course, i.e., becomes load shedding curve from MPPT curves；What award setting changed is the pneumatic of wind turbine capture
Power curve, as shown in the figure.P in figureaFor wind turbine normal operation MPPT points when stable state output, individually use rotor speed control
When, load shedding operation output is Pd, available frequency regulation capacity is (P under rotor speed controla-Pd)；Individually use propeller pitch angle control
When processed, load shedding operation output is Pc, available frequency regulation capacity is (P under award settinga-Pc).If considering simultaneously, rotor turns
Speed control and award setting strategy, then its load shedding operation output is Pb, available frequency regulation capacity is (P this momenta-Pb).It is comprehensive
Using two kinds of control modes, it can participate in frequency modulation on the basis of ensureing to export more wind-powered electricity generations as far as possible for wind turbine and provide as far as possible
More spare capacities.Hold to acquire the frequency modulation that wind power plant provides under comprehensive utilization rotor speed control and award setting
Amount, takes control strategy below：
1. closing award setting under normal circumstances, wind turbine maintenance operates in load shedding operating point P0, i.e., the d points in figure；
2. when needing to raise spare, fan operation state is from load shedding operating point P0, i.e., the d points in figure are moved to MPPT
Point, i.e., a points in figure increase wind turbine and contribute to reduce downward fluctuation；
3. when needing to lower spare, start award setting, be further reduced wind turbine and contribute to reduce upward fluctuation,
Fan operation state is set to be moved to b points from the d points in figure.
The step 3) considers the wind field up/down frequency regulation capacity Δ R of the active active control strategies of wind turbine+/ΔR-Assessment side
Method is as follows：
ΔR+=PMPPT-P0=Kr·PMPPT
ΔR-=P0-Pm(β)
ΔR+/ΔR-=R+/R-
Wherein, PMPPTPower output when being run with maximum power for wind turbine, Pm(β) is that wind turbine load shedding runs power output.
Preceding two formula indicates to consider the correction value of the upper and lower frequency regulation capacity of rotor speed control and award setting, they respectively with amendment
Preceding basic spare capacity is proportional.The Aerodynamics Model of wind power generating set is described below：
1/λi=1/ (λ -0.02 β) -0.003/ (1+ β3)
λ=ωrR/vw
Wherein, KrFor the equivalent coefficient of frequency regulation capacity, i.e. the load shedding ratio of wind turbine load shedding operation；P0It is steady for wind power generating set
Power output when state is run；λ and β indicates the tip speed ratio and propeller pitch angle of wind turbine；ρ indicates that atmospheric density, A indicate that blade scans
Area, ωrIndicate fan rotor rotation speed；R indicates fan blade radius, vwIndicate wind speed.
Constraints：
Fan rotor rotation speed constrains：
Propeller pitch angle adjustable range constrains：0≤β≤βmax
Load shedding is than constraint：
Wherein, fan rotor rotation speed constraint is arranged by wind turbine technical specification, and propeller pitch angle adjustable range and load shedding are than constraint root
It is arranged according to experience.
The step 4) considers that the wind-powered electricity generation of wind field frequency regulation capacity adjusts the correction model of spare capacity with the following method
It establishes：
Wherein,Indicate that the frequency regulation capacity for considering to provide under the active active control of wind turbine adjusts up/down for wind-powered electricity generation
Adjust the revised value of spare capacity.
The frequency modulation energy that wind-powered electricity generation participates in system can be given full play to by carrying out the assessment of wind power plant spare capacity using the method for the present invention
Power reduces the spare capacity needed for wind power plant under the premise of ensureing system reliability, and then reduces stand-by cost as far as possible, carries
The economy of high system operation.Effective ginseng that corresponding assessment result can be configured as system call and wind power plant spare capacity
Examine foundation.
Specific embodiments of the present invention are as follows：
We carry out spare capacity assessment using institute's extracting method to shown wind power plant.After acquisition goes out force data in wind power plant year,
Wind speed and output power curve under the wind turbine type and wind turbine normal condition selected according to wind field, can be to side proposed by the present invention
Method is verified.
Simulation calculation is carried out to embodiment using the method for the present invention, it is as a result as follows：
Figure gives wind field 00:00-01:00 period lower spare capacity probability column diagram, from column diagram it is recognised that
As given confidence level λ-It afterwards can be from the spare capacity obtained in figure in the period.Figure gives confidence level
When 98.5% and 96.5%, the upper and lower tune spare capacity curve graph of 24 period of wind field.From figure it can be found that when the confidence set
Horizontal higher, it is bigger that wind-powered electricity generation adjusts required spare capacity.This is because confidence level is higher, illustrate that smooth wind-powered electricity generation is needed to go out
Fluctuation is bigger, then required spare capacity is also bigger.In addition, with the increase of confidence level, spare capacity between day part
Difference also increase, this is because confidence level height indicates that the requirement of flat volatility is higher, otherness between day part can body
Existing becomes apparent from.It is also found that no matter confidence level is high or low from figure, the spare capacity outline needed for wind field daytime is less than
Night illustrates that the wind-resources at night are more rich steady, and the wind-resources fluctuation on daytime is more notable.And the amendment through frequency regulation capacity
Afterwards, the upper and lower of wind power plant adjusts the variation of spare capacity substantially in 5% range, illustrates the size of frequency regulation capacity compared to base
The very little for the wind power plant basis spare capacity of historical statistics, only plays the role of amendment and precision, basic spare capacity
It plays a decisive role.
Above-mentioned specific implementation mode is used for illustrating the present invention, rather than limits the invention, the present invention's
In spirit and scope of the claims, to any modifications and changes that the present invention makes, the protection model of the present invention is both fallen within
It encloses.
Claims (2)
1. a kind of meter and the wind-powered electricity generation of the active active control of wind turbine adjust spare capacity appraisal procedure, it is characterised in that including following step
Suddenly：
1) it is based on historical data statistics and entry evaluation is carried out to wind power plant basis spare capacity；
2) to wind turbine frequency modulation control strategy modeling；
3) consider the active active control strategies of wind turbine, wind field frequency regulation capacity is assessed；
4) consider wind field frequency regulation capacity, establish wind-powered electricity generation and adjust spare capacity correction model, to the wind-powered electricity generation tune of step 1) entry evaluation
Section spare capacity is modified；
The spare up/down tune spare capacity R in wind power plant basis that the step 1) is counted based on historical data+/R-Assessment use with
Lower formula obtains：
P+=max { Pi}-avg{Pi}
P-=avg { Pi}-min{Pi}
Wherein, PiFor the wind power plant history output data time series of acquisition；P+For interior wind power output maximum value per hour and averagely
The difference of value；P-For the difference of interior wind power output average value and minimum value per hour；I.e.：P+/P-Indicate flat with interior wind power output per hour
When mean value is reference value, interior wind power output up/down fluctuation per hour is to greatest extent；Indicate in discrete standardization/
Spare capacity value is lowered, is manually set according to the practical output situation of wind field；Indicate that statistics goes out force data in wind power plant year
In per hour in the fluctuation of wind power output up/down P to greatest extent+/P-It is no more thanProbability；λ+/λ-Indicate smooth wind power
The confidence level of fluctuation, depending on the demand that wind field is contributed；R+/R-Indicate that the wind power plant basis counted based on historical data is standby
It is probability with up/down capacityNot less than confidence level λ+/λ-Under the premise of select the discrete normalized spare appearance of up/down tune
AmountMinimum value；
The step 3) considers the wind field up/down frequency regulation capacity Δ R of the active active control strategies of wind turbine+/ΔR-Appraisal procedure is such as
Under：
ΔR+=PMPPT-P0=Kr·PMPPT
ΔR-=P0-Pm(β)
ΔR+/ΔR-=R+/R-
Wherein, PMPPTPower output when being run with maximum power for wind turbine, Pm(β) is that wind turbine load shedding runs power output；Preceding two
Formula indicates to consider the correction value of the upper and lower frequency regulation capacity of rotor speed control and award setting, they respectively with before amendment
Basic spare capacity is proportional；The Aerodynamics Model of wind power generating set is described below：
1/λi=1/ (λ -0.02 β) -0.003/ (1+ β3)
λ=ωrR/vw
Wherein, KrFor the equivalent coefficient of frequency regulation capacity, i.e. the load shedding ratio of wind turbine load shedding operation；P0It is transported for wind power generating set stable state
Power output when row；λ and β indicates the tip speed ratio and propeller pitch angle of wind turbine；ρ indicates that atmospheric density, A indicate the face that blade scans
Product, ωrIndicate fan rotor rotation speed；R indicates fan blade radius, vwIndicate wind speed；
Constraints：
Fan rotor rotation speed constrains：
Propeller pitch angle adjustable range constrains：0≤β≤βmax
Load shedding is than constraint：
Wherein, fan rotor rotation speed constraint is arranged by wind turbine technical specification, and propeller pitch angle adjustable range and load shedding are than constraining according to warp
Test setting；
The step 4) considers that the correction model of the wind-powered electricity generation adjusting spare capacity of wind field frequency regulation capacity is established with the following method：
Wherein,It is spare to indicate that the frequency regulation capacity for considering to provide under the active active control of wind turbine adjusts up/down tune for wind-powered electricity generation
Value after cubage correction.
2. a kind of meter according to claim 1 and the wind-powered electricity generation of the active active control of wind turbine adjust spare capacity appraisal procedure,
It is characterized in that：Step 2) the wind turbine frequency modulation control strategy modeling is specifically described as：
1. closing award setting under normal circumstances, wind turbine maintenance operates in load shedding operating point P0；
2. when needing to raise spare, fan operation state is from load shedding operating point P0Maximal power tracing point MPPT points are moved to, are increased
Wind turbine is added to contribute to reduce downward fluctuation；
3. when needing to lower spare, start award setting, is further reduced wind turbine and contributes to reduce upward fluctuation.
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| CN106528912A (en) * | 2016-09-19 | 2017-03-22 | 国网浙江省电力公司经济技术研究院 | Method for estimating frequency regulation capacity of wind power plant |
| CN106960262B (en) * | 2017-03-29 | 2022-09-02 | 中国电力科学研究院有限公司 | Active reserve capacity evaluation method and device for expected faults of extra-high voltage direct current line |
| CN108011394A (en) * | 2017-12-08 | 2018-05-08 | 浙江大学 | A kind of spare optimization method of electric system robust for considering wind-powered electricity generation load shedding |
| CN111030142B (en) * | 2020-01-02 | 2021-03-23 | 重庆大学 | Multi-time scale frequency optimization control method for high-proportion wind power system |
| CN111754361B (en) * | 2020-06-29 | 2022-05-03 | 国网山西省电力公司电力科学研究院 | Energy storage capacity optimal configuration method and computing device of wind-storage combined frequency modulation system |
| CN113159423A (en) * | 2021-04-22 | 2021-07-23 | 国网山东省电力公司潍坊供电公司 | Multi-energy combined optimization scheduling operation method based on wind, fire and light storage coordination |
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