CN108521142A - A kind of Wind turbines primary frequency modulation control method for coordinating - Google Patents
A kind of Wind turbines primary frequency modulation control method for coordinating Download PDFInfo
- Publication number
- CN108521142A CN108521142A CN201810321926.9A CN201810321926A CN108521142A CN 108521142 A CN108521142 A CN 108521142A CN 201810321926 A CN201810321926 A CN 201810321926A CN 108521142 A CN108521142 A CN 108521142A
- Authority
- CN
- China
- Prior art keywords
- wind turbines
- wind
- power
- frequency modulation
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000004044 response Effects 0.000 claims abstract description 17
- 210000003746 feather Anatomy 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 claims abstract description 6
- 230000033228 biological regulation Effects 0.000 claims abstract description 5
- 230000002045 lasting effect Effects 0.000 claims abstract description 5
- 238000004364 calculation method Methods 0.000 claims description 18
- 238000007665 sagging Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- H02J3/386—
-
- 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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a kind of Wind turbines primary frequency modulation control method for coordinating, include the following steps：1, grid entry point system frequency and frequency change rate are measured in real time；2, Control of decreasing load is carried out to unit by feather, Wind turbines is made to have stable active frequency regulation capacity under different wind regime；3, it is controlled by rotor kinetic energy and introduces additional torque compensation tache, Wind turbines is made to have quick active response characteristic；4, coordinating control by rotor kinetic energy and power backup realizes quick, the lasting response that Wind turbines change system frequency, this method is suitable for each wind speed, and can have an equal amount of spare capacity under different wind speed, make wind turbine Primary frequency control ability no longer by wind speed size-dependence.
Description
Technical field
The invention belongs to Wind turbines interconnection technology fields, and in particular to a kind of Wind turbines primary frequency modulation coordination controlling party
Method.
Background technology
Wind energy is as a kind of new energy of sustainable development, with its nonstaining property and recyclability, increasingly by the world
The extensive attention of various countries.In recent years, the wind power generation industry in China has obtained rapid development, and installed capacity of wind-driven power constantly carries
Height, as more and more high-capacity wind power plants are directly incorporated into power grid so that wind-powered electricity generation and influencing each other for power grid become increasingly complex.
In wind generating technology, main force type of the speed-variable frequency-constant wind-driven generator group as nowadays commercialized running,
Variable speed constant frequency Wind turbines are connect by current transformer with power grid so that wind wheeling rotor is decoupled with system frequency, can not be in system frequency
Rate automatically provides inertia support when changing.In addition, Wind turbines generally use maximal wind-energy capture control to run on maximum at present
Near power points, frequency modulation spare capacity can not be provided in active be adjusted up, further increases the frequency modulation pressure of system.
Nowadays, the FREQUENCY CONTROL of wind power plant is paid close attention to by more and more Utilities Electric Co.s and is proposed relevant technology and wants
Ask, wind power plant itself has fm capacity, participate in power grid frequency adjustment, be power grid friendly wind power plant important feature it
One.
Currently, the method that variable speed constant frequency Wind turbines participate in primary frequency modulation mainly has the control of rotor kinetic energy and power backup control
Two kinds of system.1) control of rotor kinetic energy converts rotor portion kinetic energy to electromagnetic power ginseng by additional certain frequency control link
It is controlled with system frequency, but used control method does not consider the fm capacity of Wind turbines under different operating conditions,
And the clear-cutting forestland of rotor needs grow very much one section of process, is unfavorable for the support of next stage system frequency.2) power backup control
System, proposition reduce a part of active output by controlling propeller pitch angle or adjustment power-rotating speed optimal curve under normal circumstances,
Give over to non-firm power.When system frequency reduces, by adjusting propeller pitch angle or unit active power reference value, increase active output
Participate in frequency adjustment.But prolonged power backup reduces the income of wind power plant, does not have economy and practicability.
Invention content
To solve the above-mentioned problems, it the present invention provides a kind of Wind turbines primary frequency modulation control method for coordinating, improves
The active response speed of Wind turbines, at the same reduce the spare control mode of conventional power reserve power it is more, less economical asks
Topic.
In order to achieve the above objectives, a kind of Wind turbines primary frequency modulation control method for coordinating of the present invention includes following step
Suddenly：
The frequency f and frequency change rate df/dt of step 1, in real time acquisition Wind turbines grid entry point；
Step 2 carries out power backup control by feather to Wind turbines, stores non-firm power, Wind turbines is made to have
Standby reliable and stable frequency regulation capacity；
Step 3 controls introducing additional torque compensation tache by rotor kinetic energy, and additional torque compensation tache includes virtual used
Amount control and two links of droop control make the ability that Wind turbines have quick active response by the release of rotor kinetic energy,
In virtual inertia control be：By the active power increment Δ P proportional to system frequency derivative df/dt1Active power ginseng is added
It examines in value；
After step 4, the control of rotor kinetic energy, the non-firm power stored by variable pitch control release steps 2, to power grid
Lasting active support is provided, additional active increment is related with the frequency f of Wind turbines grid entry point.
Further, in step 2, non-firm power storage is carried out by carrying out off-load operation control to Wind turbines, it is a certain
Under wind speed, the maximums of Wind turbines can generated output be Pava, power when Wind turbines have the off-load level of d% is Pres,
PresCalculation formula is：Pres=Pava- d% × PN, wherein PNFor the rated power of Wind turbines, the value range of d% is 0~
20%.
Further, in step 2, the rotating speed desired value of Wind turbines is determined by active frequency modulation desired value, Wind turbines
Rotating speed of target ωdemCalculation formula it is as follows：
Wherein, PdemFor active frequency modulation desired value, η is electrical efficiency, KoptFor optimum torque coefficient, calculation formula is：Wherein, Cp-maxFor maximal wind-energy usage factor, λoptFor optimum tip-speed ratio, G is transmission ratio, and R is
Wind wheel radius, P1And P2Respectively the operation of Wind turbines when the areas MPPT upper limit of the power value and lower limiting value.
Further, in step 3, the active power increment Δ P of virtual inertia control1Calculation formula be：In formula：KIFor inertia control coefrficient, KI=2H, H are Wind turbines inertia time constant, fNFor power grid
Frequency reference value.
Further, in step 3, droop control process acts on simultaneously with the control of virtual inertia, and virtual inertia controller exists
Frequency fails after dropping to minimum point, and the electromagnetic power of droop control regulating wind power unit and mechanical output are slowed down to reaching
Run equalization point.
Further, in step 3, the concrete operations mode of droop control link is：When Wind turbines active power output is more than
20%PNWhen, Wind turbines participate in system primary frequency modulation according to the frequency f of Wind turbines according to following three kinds of modes：
Mode 1, when frequency f is within the scope of controlling dead error fd-~fd+, Wind turbines are not involved in primary frequency modulation, normal to transport
Row, and reserve the spare capacity of rated power d% under current wind speed；
Mode 2, when frequency f drops to fd- or less, Wind turbines increase active power output △ P2, the sagging coefficient of frequency modulation is
K1, it is reserved capacity or primary frequency modulation power instruction calculated value that active power, which increases the frequency value added upper limit,；
Mode 3, when frequency f rises to fd+ or more, Wind turbines reduce active power output △ P2, the sagging COEFFICIENT K of frequency modulation2,
When system frequency continuously rises to 51.5Hz or more, stop powering to power grid；
△P2It is divided into two parts, a part is by high-pass filter output Δ P2', the active increment with the control of virtual inertia
It is overlapped, carries out additional torque control；Another part is by low-pass filter output Δ P2", the mesh for the Wind turbines that are added to
Mark performance number PsetOn, step 4 is executed, the calculation formula of the output additional torque △ T of additional torque compensation tache is in step 3：Wherein, ωrFor Wind turbines actual speed, additional torque △ T are added to the reference of Conventional torque control
In value, new torque reference instruction T is obtaineddem。
Further, in step 3, the value range of fd is 0.05Hz~0.2Hz.
Further, in step 3, sagging coefficient is K1And K2Value range be 5~20.
Further, in step 4, continual and steady response of the Wind turbines to system frequency is realized by variable pitch control,
Under primary frequency modulation pattern, the target power value P of Wind turbinessetCalculation formula be Pest=Pava- d%*PN+ΔP2", wind-powered electricity generation
Unit target power value PsetAfter determination, new rotating speed of target is obtained by rotating speed aim curve, is then maintained by variable pitch control
Rotating speed is near rotating speed of target, and direct torque is according to maximal wind-energy capture torque reference.
Further, in step 4, PavaBy the current wind speed V of wind turbinewindIt is determined with the wind speed power curve of Wind turbines,
Current wind speed VwindCalculating Wind turbines maximum is used further to after progress low-pass filtering treatment can send out power Pava。
Compared with prior art, the present invention at least has beneficial technique effect below, and rotor kinetic energy is controlled and power
Two kinds of primary frequency modulation modes of spare control combine, and overcome single control stability and the shortcomings that economy is difficult to take into account.
Virtual inertia response and droop characteristic are provided first with direct torque, so that Wind turbines is had quickly by the release of rotor kinetic energy
The ability of active response；Then, the non-firm power that advance reservation is discharged by variable pitch control provides lasting active to power grid
Support.The program only need to carry out algorithm upgrading without increasing hardware cost to conventional control software of wind generation set, can maximum limit
The reduction upgrade cost of degree, while the Primary frequency control ability of Wind turbines is played, accelerate mains frequency resume speed.
Further, PavaBy the current wind speed V of wind turbinewindIt is determined with the wind speed power curve of Wind turbines, current wind speed
VwindCalculating Wind turbines maximum is used further to after progress low-pass filtering treatment can send out power Pava, reducing fluctuations in wind speed can to maximum
Send out the influence of power.
Description of the drawings
Fig. 1 is variable speed constant frequency running of wind generating set curve；
Fig. 2 is hopping pattern rotating speed aim curve；
Fig. 3 is Wind turbines primary frequency modulation droop characteristic；
Fig. 4 is that Wind turbines primary frequency modulation coordinates control block diagram.
Specific implementation mode
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the present invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance or the quantity for implicitly indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be bright
Show or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " multiple " contain
Justice is two or more.
With reference to Fig. 4, a kind of Wind turbines primary frequency modulation control method for coordinating includes the following steps：
The frequency f and frequency change rate df/dt of step 1, in real time acquisition Wind turbines grid entry point, to ensure control effect,
It is required that frequency measurement accuracy is not less than 0.01Hz, the frequency measurement period is less than or equal to 20ms；
Step 2 carries out power backup control by feather to Wind turbines, and Wind turbines is made to have reliable and stable tune
Frequency capacity；
Step 3 controls introducing additional torque compensation tache by rotor kinetic energy, and wherein additional torque compensation tache includes void
Quasi- inertia control and two links of droop control discharge the energy for making Wind turbines have quick active response by rotor kinetic energy
Power；
After step 4, the control of rotor kinetic energy, the non-firm power stored by variable pitch control release steps 2 is to power grid
Lasting active support is provided, additional active increment is determined by Wind turbines primary frequency modulation droop characteristic, discharges storage
Non-firm power by reduce propeller pitch angle β realize, such as：Certain 1.5MW Wind turbines, rated wind speed 12m/s, if do not retained standby
With corresponding propeller pitch angle is 0 degree at this time；Retaining 10%PNIn the case of non-firm power, propeller pitch angle is operated in 5 degree, and wind turbine is real
It is only 1.35MW that border, which sends out power,.
Based on conventional control policy definition " hopping pattern " in step 2, by feather to Wind turbines power backup
Control, makes Wind turbines be provided with reliable frequency regulation capacity under different wind regime.
In order to ensure that Wind turbines itself have certain spare frequency regulation capacity, need to carry out off-load operation to Wind turbines
Control.Off-load level indicates that it refers to that active frequency modulation spare capacity accounts for the specified work(of Wind turbines that the present invention, which defines off-load level, with d%
Rate PNRatio.
Under a certain wind speed V, the maximums of Wind turbines can generated output be Pava, when Wind turbines have the off-load level of d%
Power be Pres, off-load level calculation formula is as follows：
Pres=Pava- d% × PN (1)
In formula：PavaElectric power, P can be sent out for the current maximum of Wind turbinesNFor the rated power of Wind turbines, d% is according to electricity
Net Plan Curve is set, between generally 0~20%.
The traffic coverage of variable speed constant frequency Wind turbines is divided into the areas permanent rotating speed I, the areas MPPT, the permanent areas rotating speed II and invariable power area.
As shown in Figure 1, in the areas permanent rotating speed I, generator speed is maintained into minimum running speed ω by adjusting electromagnetic torque1Near；
In the areas MPPT, for running of wind generating set on maximal wind-energy capture curve, the power upper lower limit value in the areas MPPT is respectively P1And P2；
The areas permanent rotating speed II, rotating speed reach rated speed ω2, continue to improve power by increasing electromagnetic torque；In invariable power area, pass through change
Pitch control maintains running of wind generating set in ω2Near.
For the control feature of different zones, the present invention proposes a kind of Wind turbines Control of decreasing load under " hopping pattern "
Strategy.In the normal mode, the rotating speed desired value of variable pitch control is rated speed；And under " hopping pattern ", Wind turbines
Rotating speed desired value determine that correspondence is as shown in Fig. 2, Fig. 2 is exchanged to obtain by the X-Y coordinate of Fig. 1 by active frequency modulation desired value.
Under hopping pattern, shown in Wind turbines rotating speed of target calculation formula such as formula (2)：
Wherein, ωdemFor the rotating speed desired value of Wind turbines, PdemFor active frequency modulation desired value, η is electrical efficiency (containing hair
Motor and current transformer), KoptFor optimum torque coefficient, calculation formula is shown below：
In formula (3), Cp-maxFor maximal wind-energy usage factor, λoptFor optimum tip-speed ratio, G is transmission ratio, and R is wind wheel half
Diameter (m), P1And P2Respectively the operation of Wind turbines when the areas MPPT upper limit of the power value and lower limiting value.
Under a certain wind speed V, when normal operation, for Wind turbines balance in A points, Wind turbines generated output is Popt, generator
Rotating speed is ωopt.Wind turbines have corresponding for power P when the off-load level of d%res, P available by formula (2)res
Corresponding rotating speed of target is ωres, then by increasing propeller pitch angle, running of wind generating set operating point is adjusted to B points, because on an equal basis
Under wind friction velocity, propeller pitch angle is bigger, and wind speed round is smaller.Because rotating speed of target reduces, actual speed is set to reach by increasing propeller pitch angle
To desired value.
It is limited by the response speed and Wind turbines mechanical load of Wind turbines feather executing agency, Wind turbines
The time for reaching new target power generally requires 3~10s.
The control of rotor kinetic energy includes virtual inertia control and droop control two parts in step 3, respectively becomes system frequency
Rate and frequency measurement signal introduce conventional Wind turbines direct torque.The design of the virtual inertia control of Wind turbines is that simulation is same
The inertia response process in generator is walked, by the active power increment Δ P proportional to system frequency derivative df/dt1Electricity is added
In magnetic power reference value.
Since the time delay of Wind turbines rotating speed causes mechanical output to keep constant, therefore active power uprushes and promotes rotor
Rotating speed declines, and discharges rotation function, reduces system frequency decrease speed.Wherein active power increment Δ P1Calculation formula is as follows：
In formula：KIFor inertia control coefrficient, it is considered that KI=2H, H are Wind turbines inertia time constant, the value model of H
It encloses for 2s~6s.
The virtual inertia control response time is very short, and the system of being only provides of short duration frequency support, but can be wind turbine
The feather action of group provides certain response time, to reducing system frequency fall off rate, reduces because of system power imbalance
Caused by frequency out-of-limit amplitude, to improve power system stability operation it is particularly important.
In step 3, droop control is a steady-state process, is mainly used for reducing system frequency deviation.The control process with
Virtual inertia is controlled while being acted on, but virtual inertia controller fails after frequency drops to minimum point, droop control tune
The electromagnetic power and mechanical output for saving Wind turbines enter new steady operational status to the equalization point that runs slowly, system is reached.
It is more than a certain range in mains frequency variation, and Wind turbines active power output is more than 20%PN(PNFor Wind turbines
Rated power) when, Wind turbines increase or decrease Wind turbines according to preset droop characteristic and contribute automatically, participate in system
Primary frequency modulation, when Wind turbines active power output is less than 20%PNWhen, do not activate droop control.
The present invention is as shown in Figure 3 according to the Wind turbines droop characteristic that control purpose is worked it out.
1) when frequency f is within the scope of controlling dead error fd-~fd+, Wind turbines are not involved in primary frequency modulation, normal operation,
And the spare capacity of rated power d% under current wind speed is reserved, the value range of general fd is 0.05Hz~0.2Hz.
2) when frequency f drops to fd- or less, Wind turbines increase active power output △ P2, the sagging coefficient of frequency modulation is K1, have
It is reserved capacity or primary frequency modulation power instruction calculated value, active power output △ P that work(power, which increases the frequency value added upper limit,2Calculating
Formula is as follows：
△P2≤0.1PN, wherein K1Value range is 5~20；
3) when frequency f rises to fd+ or more, Wind turbines reduce active power output △ P2, the sagging COEFFICIENT K of frequency modulation2, when being
When system frequency continuously rises to 51.5Hz or more, stop powering to power grid, active power output △ P2Calculation formula it is as follows：
Wherein K2Value range be 5~20.
Frequency f in three cases above refers both to the frequency f of collected Wind turbines grid entry point in step 1.
In the present invention, △ P2It is divided into two parts, a part is by high-pass filter output Δ P2', with the control of virtual inertia
Active increment is overlapped, and carries out additional torque control；Another part is by low-pass filter output Δ P2", be added to wind-powered electricity generation
The target power value P of unitsetOn, it is variable pitch control to execute step 4.The wherein cut-off of high-pass filter and low-pass filter
Frequency is answered identical.
The output additional torque △ T of additional torque link are shown below in step 3：Wherein, ωr
For Wind turbines actual speed.
Additional torque △ T are added in the reference value of Conventional torque control, obtain new torque reference instruction Tdem.Rotor
The kinetic energy control response time is very short (20ms~10s), and the system of being only provides of short duration frequency support, but can be Wind turbines
Feather action certain response time is provided, to reducing system frequency fall off rate, reduce because system power imbalance is made
At frequency out-of-limit amplitude, to improve power system stability operation it is particularly important.
In step 4, continual and steady response of the Wind turbines to system frequency is realized by variable pitch control.
Under primary frequency modulation pattern, the target power value P of Wind turbinessetPower P can be sent out by Wind turbines maximumava, subtract
Carry the secondary power Δ P after low-pass filtering of percentage d% and step 3 output2" three parts determine that calculation formula is：Pset
=Pava- d%*PN+ΔP2", wherein PavaBy the current wind speed V of wind turbinewindIt is determined with the wind speed power curve of Wind turbines.Its
Middle VwindBy the real-time measurement of the anemobiagraph in cabin, the influence of power can be sent out in order to reduce fluctuations in wind speed to maximum, is needed
Low-pass filtering treatment is carried out to input wind velocity signal.Wind speed power curve can be by inquiring Wind turbines design curve or going through
History operation data obtains.
In step 4, after Wind turbines target power determines, rotating speed aim curve as shown in Figure 2 obtains new target turn
Speed maintains rotating speed near rotating speed of target by variable pitch control, and direct torque is according to maximal wind-energy capture torque reference.
After 3~10s, Wind turbines can be with stable operation in new operating point, and output power reaches Pset.At this point, step
The additional torque value of rapid 3 output also reverts to 0, and so far primary frequency modulation process terminates, and Wind turbines can provide for power grid to be continued
Reliable active frequency modulation power.
In the present invention, in all formula：PNFor the rated power of Wind turbines, fNFor mains frequency a reference value, fN=
50Hz。
Finally it should be noted that：Above example is merely to illustrate the technical solution of the application rather than to its protection domain
Limitation, although the application is described in detail with reference to above-described embodiment, those of ordinary skill in the art should
Understand：Those skilled in the art read the specific implementation mode of application can still be carried out after the application various changes, modification or
Person's equivalent replacement, but these changes, modification or equivalent replacement, are applying within pending claims.
Claims (10)
1. a kind of Wind turbines primary frequency modulation control method for coordinating, which is characterized in that include the following steps：
The frequency f and frequency change rate df/dt of step 1, in real time acquisition Wind turbines grid entry point；
Step 2 carries out power backup control by feather to Wind turbines, stores non-firm power, Wind turbines is made to have surely
Fixed reliable frequency regulation capacity；
Step 3 controls introducing additional torque compensation tache by rotor kinetic energy, and additional torque compensation tache includes virtual inertia control
System and two links of droop control make the ability that Wind turbines have quick active response, wherein empty by the release of rotor kinetic energy
Quasi- inertia, which controls, is：By the active power increment Δ P proportional to system frequency derivative df/dt1Active power reference value is added
In；
After step 4, the control of rotor kinetic energy, the non-firm power stored by variable pitch control release steps 2 is provided to power grid
Lasting active support, additional active increment are related with the frequency f of Wind turbines grid entry point.
2. a kind of Wind turbines primary frequency modulation control method for coordinating according to claim 1, which is characterized in that in step 2,
Non-firm power storage is carried out by controlling Wind turbines progress off-load operation, under a certain wind speed, the maximum of Wind turbines can be sent out
Electrical power is Pava, power when Wind turbines have the off-load level of d% is Pres, PresCalculation formula is：Pres=Pava- d%
×PN, wherein PNValue range for the rated power of Wind turbines, d% is 0~20%.
3. a kind of Wind turbines primary frequency modulation control method for coordinating according to claim 2, which is characterized in that in step 2,
The rotating speed desired value of Wind turbines determines by active frequency modulation desired value, the rotating speed of target ω of Wind turbinesdemCalculation formula such as
Under：
Wherein, PdemFor active frequency modulation desired value, η is electrical efficiency, KoptFor optimum torque coefficient, calculation formula is：Wherein, Cp-maxFor maximal wind-energy usage factor, λoptFor optimum tip-speed ratio, G is transmission ratio, and R is
Wind wheel radius, P1And P2Respectively the operation of Wind turbines when the areas MPPT upper limit of the power value and lower limiting value.
4. a kind of Wind turbines primary frequency modulation control method for coordinating according to claim 1, which is characterized in that in step 3,
The active power increment Δ P of virtual inertia control1Calculation formula be：In formula：KIIt is controlled for inertia
Coefficient, KI=2H, H are Wind turbines inertia time constant, fNFor mains frequency a reference value.
5. a kind of Wind turbines primary frequency modulation control method for coordinating according to claim 1, which is characterized in that in step 3,
Droop control process acts on simultaneously with the control of virtual inertia, and virtual inertia controller stops making after frequency drops to minimum point
With the electromagnetic power of, droop control regulating wind power unit and mechanical output to reaching the equalization point that runs slowly.
6. a kind of Wind turbines primary frequency modulation control method for coordinating according to claim 1, which is characterized in that in step 3,
The concrete operations mode of droop control link is：When Wind turbines active power output is more than 20%PNWhen, Wind turbines are according to wind-powered electricity generation
The frequency f of unit participates in system primary frequency modulation according to following three kinds of modes：
Mode 1, when frequency f is within the scope of controlling dead error fd-~fd+, Wind turbines are not involved in primary frequency modulation, normal operation,
And reserve the spare capacity of rated power d% under current wind speed；
Mode 2, when frequency f drops to fd- or less, Wind turbines increase active power output △ P2, the sagging coefficient of frequency modulation is K1, have
It is reserved capacity or primary frequency modulation power instruction calculated value that work(power, which increases the frequency value added upper limit,；
Mode 3, when frequency f rises to fd+ or more, Wind turbines reduce active power output △ P2, the sagging COEFFICIENT K of frequency modulation2, when being
When system frequency continuously rises to 51.5Hz or more, stop powering to power grid；
△P2It is divided into two parts, a part is by high-pass filter output Δ P2', it is carried out with the active increment of virtual inertia control
Superposition carries out additional torque control；Another part is by low-pass filter output Δ P2", the target work(for the Wind turbines that are added to
Rate value PsetOn, step 4 is executed, the calculation formula of the output additional torque △ T of additional torque compensation tache is in step 3：Wherein, ωrFor Wind turbines actual speed, additional torque △ T are added to the reference of Conventional torque control
In value, new torque reference instruction T is obtaineddem。
7. a kind of Wind turbines primary frequency modulation control method for coordinating according to claim 6, which is characterized in that in step 3,
The value range of fd is 0.05Hz~0.2Hz.
8. a kind of Wind turbines primary frequency modulation control method for coordinating according to claim 6, which is characterized in that in step 3,
Sagging coefficient is K1And K2Value range be 5~20.
9. a kind of Wind turbines primary frequency modulation control method for coordinating according to claim 6, which is characterized in that in step 4,
Continual and steady response of the Wind turbines to system frequency, under primary frequency modulation pattern, Wind turbines are realized by variable pitch control
Target power value PsetCalculation formula be Pest=Pava- d%*PN+ΔP2", Wind turbines target power value PsetAfter determination,
New rotating speed of target is obtained by rotating speed aim curve, then maintains rotating speed near rotating speed of target by variable pitch control, torque
Control is according to maximal wind-energy capture torque reference.
10. a kind of Wind turbines primary frequency modulation control method for coordinating according to claim 9, which is characterized in that step 4
In, PavaBy the current wind speed V of wind turbinewindIt is determined with the wind speed power curve of Wind turbines, current wind speed VwindCarry out low pass filtered
Calculating Wind turbines maximum is used further to after wave processing can send out power Pava。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810321926.9A CN108521142B (en) | 2018-04-11 | 2018-04-11 | Primary frequency modulation coordination control method for wind turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810321926.9A CN108521142B (en) | 2018-04-11 | 2018-04-11 | Primary frequency modulation coordination control method for wind turbine generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108521142A true CN108521142A (en) | 2018-09-11 |
| CN108521142B CN108521142B (en) | 2020-06-09 |
Family
ID=63430836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810321926.9A Active CN108521142B (en) | 2018-04-11 | 2018-04-11 | Primary frequency modulation coordination control method for wind turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108521142B (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245162A (en) * | 2018-10-19 | 2019-01-18 | 湘电风能有限公司 | A kind of Poewr control method of permanent magnet direct-drive wind turbine group |
| CN109494762A (en) * | 2018-10-15 | 2019-03-19 | 国网陕西省电力公司电力科学研究院 | Photovoltaic plant primary frequency modulation control method and system based on more main website coordinated controls |
| CN109586319A (en) * | 2018-10-30 | 2019-04-05 | 中国电力科学研究院有限公司 | A kind of Wind turbines participate in system frequency modulation method and system |
| CN109611270A (en) * | 2018-11-23 | 2019-04-12 | 东方电气自动控制工程有限公司 | A kind of Control of decreasing load method of wind power generating set primary frequency modulation |
| CN110071526A (en) * | 2019-04-19 | 2019-07-30 | 四川大学 | A kind of PMSG blower participates in the adaptive droop control method of mains frequency adjusting |
| CN110148973A (en) * | 2019-04-17 | 2019-08-20 | 国电南瑞科技股份有限公司 | A kind of Wind turbines frequency modulation control method, apparatus and system based on forecasting wind speed |
| CN111371104A (en) * | 2020-03-20 | 2020-07-03 | 国网内蒙古东部电力有限公司 | Power grid frequency stability control method based on wind-storage combined power generation system |
| CN111525599A (en) * | 2020-05-12 | 2020-08-11 | 国网四川省电力公司经济技术研究院 | Frequency modulation control method for speed-increasing type wind turbine generator |
| CN111946548A (en) * | 2020-08-18 | 2020-11-17 | 国网天津市电力公司电力科学研究院 | Control method for variable-pitch wind power generation system with primary frequency modulation function |
| CN111987742A (en) * | 2020-07-29 | 2020-11-24 | 明阳智慧能源集团股份公司 | Wind turbine generator virtual inertia control method and system, storage medium and computing device |
| CN112636374A (en) * | 2021-03-09 | 2021-04-09 | 沈阳微控新能源技术有限公司 | Primary frequency modulation and virtual inertia response control method and device for wind power station |
| CN112821428A (en) * | 2021-02-25 | 2021-05-18 | 南京理工大学 | Wind turbine generator primary frequency modulation method based on short-time overload control |
| CN112865168A (en) * | 2019-11-27 | 2021-05-28 | 北京国电思达科技有限公司 | Wind turbine generator set primary frequency modulation method based on virtual inertia intelligent control |
| CN113452034A (en) * | 2020-03-26 | 2021-09-28 | 新疆金风科技股份有限公司 | Primary frequency modulation method, device and system |
| CN113890062A (en) * | 2021-10-18 | 2022-01-04 | 中国华能集团清洁能源技术研究院有限公司 | Method for controlling primary frequency modulation power of wind generating set |
| CN114221395A (en) * | 2021-12-03 | 2022-03-22 | 国网河南省电力公司南阳供电公司 | Primary frequency modulation and virtual inertia control method for wind power station |
| CN114320741A (en) * | 2020-09-30 | 2022-04-12 | 新疆金风科技股份有限公司 | Power control method and equipment of wind generating set |
| EP3916945A4 (en) * | 2020-03-31 | 2022-05-18 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Method of adjusting active power of wind farm, control apparatus, and wind farm controller |
| CN114552604A (en) * | 2022-04-26 | 2022-05-27 | 华中科技大学 | Wind power primary frequency modulation method and system |
| CN114899888A (en) * | 2022-05-13 | 2022-08-12 | 华中科技大学 | Primary frequency modulation method and system for photovoltaic power station |
| CN116365546A (en) * | 2023-04-04 | 2023-06-30 | 南京工程学院 | Method for cooperatively distributing frequency modulation reference power of multiple units of wind farm |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795089A (en) * | 2013-12-12 | 2014-05-14 | 国家电网公司 | Over-speed and variable pitch coordination-based variable speed wind turbine generator set primary frequency modulation method |
| CN104333037A (en) * | 2014-11-02 | 2015-02-04 | 中国科学院电工研究所 | Cooperative control method for participating in frequency modulation and pressure regulation of power system by wind storage cluster |
| CN106505613A (en) * | 2016-11-01 | 2017-03-15 | 科诺伟业风能设备（北京）有限公司 | A kind of wind power controller |
| CN107546772A (en) * | 2017-09-22 | 2018-01-05 | 上海电力学院 | Electric voltage frequency control method for coordinating of the double-fed asynchronous Wind turbines in micro-capacitance sensor |
-
2018
- 2018-04-11 CN CN201810321926.9A patent/CN108521142B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795089A (en) * | 2013-12-12 | 2014-05-14 | 国家电网公司 | Over-speed and variable pitch coordination-based variable speed wind turbine generator set primary frequency modulation method |
| CN104333037A (en) * | 2014-11-02 | 2015-02-04 | 中国科学院电工研究所 | Cooperative control method for participating in frequency modulation and pressure regulation of power system by wind storage cluster |
| CN106505613A (en) * | 2016-11-01 | 2017-03-15 | 科诺伟业风能设备（北京）有限公司 | A kind of wind power controller |
| CN107546772A (en) * | 2017-09-22 | 2018-01-05 | 上海电力学院 | Electric voltage frequency control method for coordinating of the double-fed asynchronous Wind turbines in micro-capacitance sensor |
Non-Patent Citations (1)
| Title |
|---|
| 许瑞庆: "高风电渗透率下双馈风机参与系统调频的控制策略研究", 《CNKI中国优秀硕士学位论文全文库》 * |
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494762A (en) * | 2018-10-15 | 2019-03-19 | 国网陕西省电力公司电力科学研究院 | Photovoltaic plant primary frequency modulation control method and system based on more main website coordinated controls |
| CN109245162A (en) * | 2018-10-19 | 2019-01-18 | 湘电风能有限公司 | A kind of Poewr control method of permanent magnet direct-drive wind turbine group |
| CN109586319A (en) * | 2018-10-30 | 2019-04-05 | 中国电力科学研究院有限公司 | A kind of Wind turbines participate in system frequency modulation method and system |
| CN109586319B (en) * | 2018-10-30 | 2023-11-03 | 中国电力科学研究院有限公司 | Frequency modulation method and system for participation system of wind turbine generator |
| CN109611270A (en) * | 2018-11-23 | 2019-04-12 | 东方电气自动控制工程有限公司 | A kind of Control of decreasing load method of wind power generating set primary frequency modulation |
| CN109611270B (en) * | 2018-11-23 | 2020-07-03 | 东方电气自动控制工程有限公司 | Load shedding control method for primary frequency modulation of wind generating set |
| CN110148973A (en) * | 2019-04-17 | 2019-08-20 | 国电南瑞科技股份有限公司 | A kind of Wind turbines frequency modulation control method, apparatus and system based on forecasting wind speed |
| CN110148973B (en) * | 2019-04-17 | 2022-08-26 | 国电南瑞科技股份有限公司 | Wind turbine generator frequency modulation control method, device and system based on wind speed prediction |
| CN110071526A (en) * | 2019-04-19 | 2019-07-30 | 四川大学 | A kind of PMSG blower participates in the adaptive droop control method of mains frequency adjusting |
| CN110071526B (en) * | 2019-04-19 | 2020-11-06 | 四川大学 | Self-adaptive droop control method for PMSG fan participating in power grid frequency regulation |
| CN112865168A (en) * | 2019-11-27 | 2021-05-28 | 北京国电思达科技有限公司 | Wind turbine generator set primary frequency modulation method based on virtual inertia intelligent control |
| CN111371104B (en) * | 2020-03-20 | 2023-03-24 | 国网内蒙古东部电力有限公司 | Power grid frequency stability control method based on wind-storage combined power generation system |
| CN111371104A (en) * | 2020-03-20 | 2020-07-03 | 国网内蒙古东部电力有限公司 | Power grid frequency stability control method based on wind-storage combined power generation system |
| CN113452034B (en) * | 2020-03-26 | 2022-09-02 | 新疆金风科技股份有限公司 | Primary frequency modulation method, device and system |
| CN113452034A (en) * | 2020-03-26 | 2021-09-28 | 新疆金风科技股份有限公司 | Primary frequency modulation method, device and system |
| US12018654B2 (en) | 2020-03-31 | 2024-06-25 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Method and control device for adjusting active power of wind farm and controller of wind farm |
| AU2021206814B2 (en) * | 2020-03-31 | 2023-06-01 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Method and control device for adjusting active power of wind farm and controller of wind farm |
| EP3916945A4 (en) * | 2020-03-31 | 2022-05-18 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Method of adjusting active power of wind farm, control apparatus, and wind farm controller |
| CN111525599B (en) * | 2020-05-12 | 2023-04-11 | 国网四川省电力公司经济技术研究院 | Frequency modulation control method for speed-increasing type wind turbine generator |
| CN111525599A (en) * | 2020-05-12 | 2020-08-11 | 国网四川省电力公司经济技术研究院 | Frequency modulation control method for speed-increasing type wind turbine generator |
| CN111987742A (en) * | 2020-07-29 | 2020-11-24 | 明阳智慧能源集团股份公司 | Wind turbine generator virtual inertia control method and system, storage medium and computing device |
| CN111946548A (en) * | 2020-08-18 | 2020-11-17 | 国网天津市电力公司电力科学研究院 | Control method for variable-pitch wind power generation system with primary frequency modulation function |
| CN111946548B (en) * | 2020-08-18 | 2023-05-23 | 国网天津市电力公司电力科学研究院 | Control method with primary frequency modulation function for variable pitch wind power generation system |
| CN114320741A (en) * | 2020-09-30 | 2022-04-12 | 新疆金风科技股份有限公司 | Power control method and equipment of wind generating set |
| CN112821428A (en) * | 2021-02-25 | 2021-05-18 | 南京理工大学 | Wind turbine generator primary frequency modulation method based on short-time overload control |
| CN112821428B (en) * | 2021-02-25 | 2022-09-20 | 南京理工大学 | Wind turbine generator primary frequency modulation method based on short-time overload control |
| CN112636374B (en) * | 2021-03-09 | 2021-05-14 | 沈阳微控新能源技术有限公司 | Primary frequency modulation and virtual inertia response control method and device for wind power station |
| CN112636374A (en) * | 2021-03-09 | 2021-04-09 | 沈阳微控新能源技术有限公司 | Primary frequency modulation and virtual inertia response control method and device for wind power station |
| CN113890062B (en) * | 2021-10-18 | 2023-08-25 | 中国华能集团清洁能源技术研究院有限公司 | Method for controlling primary frequency modulation power of wind generating set |
| CN113890062A (en) * | 2021-10-18 | 2022-01-04 | 中国华能集团清洁能源技术研究院有限公司 | Method for controlling primary frequency modulation power of wind generating set |
| CN114221395A (en) * | 2021-12-03 | 2022-03-22 | 国网河南省电力公司南阳供电公司 | Primary frequency modulation and virtual inertia control method for wind power station |
| CN114552604A (en) * | 2022-04-26 | 2022-05-27 | 华中科技大学 | Wind power primary frequency modulation method and system |
| CN114552604B (en) * | 2022-04-26 | 2022-07-15 | 华中科技大学 | Wind power primary frequency modulation method and system |
| CN114899888B (en) * | 2022-05-13 | 2024-04-23 | 华中科技大学 | Primary frequency modulation method and system for photovoltaic power station |
| CN114899888A (en) * | 2022-05-13 | 2022-08-12 | 华中科技大学 | Primary frequency modulation method and system for photovoltaic power station |
| CN116365546A (en) * | 2023-04-04 | 2023-06-30 | 南京工程学院 | Method for cooperatively distributing frequency modulation reference power of multiple units of wind farm |
| CN116365546B (en) * | 2023-04-04 | 2024-06-25 | 南京工程学院 | Method for cooperatively distributing frequency modulation reference power of multiple units of wind farm |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108521142B (en) | 2020-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108521142A (en) | A kind of Wind turbines primary frequency modulation control method for coordinating | |
| CN105308312B (en) | Wind power plant controller | |
| CN109861251B (en) | Double-fed fan comprehensive control method for micro-grid transient-steady-state frequency optimization | |
| CN108448623A (en) | A kind of doubly-fed wind turbine participates in the complex control system of primary frequency regulation of power network | |
| Howlader et al. | A minimal order observer based frequency control strategy for an integrated wind-battery-diesel power system | |
| CN107453410B (en) | Load disturbance double-fed fan participated wind-diesel micro-grid frequency modulation control method | |
| CN107959304A (en) | The virtual inertia method for improving of wind power plant based on wind-storage synthetic operation | |
| Zhang et al. | Deloading power coordinated distribution method for frequency regulation by wind farms considering wind speed differences | |
| CN108365633A (en) | A kind of doubly-fed wind turbine hypervelocity virtual inertia control method of Control of decreasing load variable element | |
| CN108448622A (en) | A kind of double-fed fan motor unit participates in the award setting method of power grid frequency modulation | |
| CN107332289B (en) | A kind of variable-speed wind-power unit participation system frequency modulation method | |
| CN112117768B (en) | Wind generating set subsection frequency modulation control method based on power tracking curve switching | |
| CN109936152B (en) | Grid frequency modulation control method after high-permeability wind power grid connection and wind driven generator | |
| CN104917201A (en) | Controller and method for simulating active power frequency of double-fed induction generator (DFIG) in combination with inertia and over speed | |
| Yang et al. | Research on primary frequency regulation control strategy of wind-thermal power coordination | |
| CN110417032A (en) | A kind of double-fed blower participates in the multiobjective optimization control method of system frequency modulation | |
| CN105794067A (en) | A wind power plant with improved rise time | |
| CN105870973B (en) | A kind of energy-storage system tackles high wind-powered electricity generation permeability system frequency modulation demand capacity collocation method | |
| CN103441722B (en) | A kind of real power control method of double-fed fan motor unit | |
| CN107069799B (en) | The control method and system of double-feedback aerogenerator group | |
| CN108347059A (en) | The Wind turbines award setting method and AGC models adjusted suitable for secondary frequency | |
| CN107732943A (en) | A kind of wind-electricity integration frequency modulation method and system based on dual-feed asynchronous wind power generator | |
| CN113241778A (en) | AGC control method based on multi-region interconnected power grid | |
| CN105119324A (en) | Power control method for wind power station | |
| CN112332442A (en) | Virtual inertia control strategy optimization based on double-fed wind power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |