CN106532746B - A kind of wind power plant participates in the control system and implementation method of primary frequency modulation - Google Patents
A kind of wind power plant participates in the control system and implementation method of primary frequency modulation Download PDFInfo
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Abstract
A kind of wind power plant participates in the control system and implementation method of primary frequency modulation control, is made of modules such as Wind turbines data acquisition unit, Wind turbines inertia computing unit, Wind turbines inertia control unit, Wind turbines primary frequency modulation processing unit, telemechanical communication control unit, analysis unit, frequency disturbance units.The present invention is directed to the actual features of new energy wind-powered electricity generation, primary frequency regulation of power network is participated in by way of wind power plant plant stand grade active power coordinated control, both frequency droop control had been considered, the rotatory inertia of Wind turbines is utilized again simultaneously, when system frequency occurs to fluctuate and crosses threshold, increase the power output of Wind turbines, in the case where not increasing additional energy storage device, primary frequency modulation is quickly participated within a certain period of time, farthest play the effect of blower, reaching reduces system frequency amplitude of variation, participate in the purpose of the fast quick-recovery of mains frequency, the application of system primary frequency modulation is participated in suitable for wind power plant.
Description
Technical field
The invention belongs to technical field of electric power system control, and the realization of primary frequency modulation is participated in more particularly to a kind of wind power plant
Scheme.
Background technique
With the rapid development of wind-power electricity generation, proportion is continuously improved wind-powered electricity generation in the power system, is solving wind-powered electricity generation
Unit operation in itself low voltage crossing, unbalanced fault the problems such as after, it is desirable that wind power plant participate in electric system once adjust
Frequently, it safeguards the safe and stable operation of electric system, excavates active power of wind power field and frequency controls potentiality, provided to electric system
Ancillary service etc. becomes the hot issue of countries in the world wind power generation field research, and such as: Canada requires Wind turbines that can mention
It is for 10 seconds for the spare capacity of wind power plant installation 5%；Germany require 100MW or more wind power plant should have 2% spare capacity
System frequency is participated in adjust；Wind turbines production firm (such as Vestas, GE, SIEMENT, golden wind) both domestic and external is also just being puted forth effort
It develops Wind turbines and the function of ancillary service is provided, more stringent requirements are proposed to wind-powered electricity generation control, friendly to meet construction power grid
The demand of type wind power plant.
Wind-powered electricity generation participates in system frequency control and has attracted researchers at home and abroad, Wind turbines manufacturer to carry out many to grind
Study carefully, on the one hand these researchs concentrate on Wind turbines level, it is desirable to which the control performance for giving full play to wind-powered electricity generation single machine is proposed at present
Based on single machine control scheme there is also some limitations.On the other hand, system is participated in based on wind power plant plant stand grade once to adjust
Frequently, participating in primary frequency modulation, virtual synchronous etc. based on dispatching terminal is also the scheme for being worth further studying.Play Wind turbines
Fm role needs to solve two problems: an excess power for being to provide system frequency control carrys out source problem, second is that how to establish
The connection of Wind turbines and system disturbance, Wind turbines how the disturbance of response system, to optimize Wind turbines to system disturbance
Control.
Compared with conventional synchronization generator, integrated wind plant is since Wind turbines are grid-connected by power electronic equipment, to electricity
Net dynamic shows noninertia or weak inertia, is not responding to the variation of power grid substantially, when unbalanced power occurs for system, is easy to draw
Biggish frequency change rate and frequency offset are played, the stable operation of power grid is unfavorable for；Secondly in order to obtain maximum wind-powered electricity generation function
Rate, grid connected wind power unit generally all operates in maximal power tracing state, thus wind power plant does not have active power deposit.
Under the background that wind power plant participates in primary frequency regulation of power network, how to improve the control of primary frequency modulation using the inertia of blower
Effect reduces the amplitude of variation of frequency, needs further to study.
For wind power plant, the mode for participating in electric system primary frequency modulation is varied, including single cpu mode, plant stand grade
Power control, dispatching terminal control model etc., any mode primary frequency modulation regulating effect is best on earth, needs adequately to study.
Wind-powered electricity generation scene generally requires to dispatch unified arrangement, related plant stand needs, which are made, matches when carrying out primary frequency modulation test
It closes, test will cause normal production run certain influence.Thus station grade power control apparatus is proposed newly
It is required that having off-line test function, correct response is made to frequency disturbance signal.
Summary of the invention
In order to solve the limitation of the participation of single machine present in existing primary frequency modulation technology, how utilize inertia of blower etc.
Problem, the invention discloses the implementation methods that a kind of wind power plant participates in primary frequency modulation control.
The application specifically uses following technical scheme:
A kind of wind power plant participates in the control system of primary frequency modulation, including signal acquisition unit, primary frequency modulation processing unit, wind
Machine inertia computing unit, blower inertia control unit, wind power plant plant stand grade Active Power Controller；It is characterized by:
Signal acquisition unit, primary frequency modulation processing unit, blower inertia computing unit, blower inertia control unit, telemechanical
Communication unit, analysis unit, frequency disturbance unit are connected with wind power plant plant stand grade Active Power Controller；
The signal acquisition unit acquires wind power plant in real time and collects station bus power and frequency signal, and will acquire on signal
Reach primary frequency modulation processing unit；
The primary frequency modulation processing unit according to the wind power plant acquired in real time collect station bus frequency and rated frequency it is inclined
Residual quantity is modified the active power of wind power field target of the received dispatching down distributing of wind power plant plant stand grade Active Power Controller, and
Revised active power of wind power field target value is transmitted into fan inertia computing unit；
The blower inertia computing unit carries out again the active target value of the revised wind power plant of primary frequency modulation processing unit
Amendment calculates the releasable rotation function of rotation speed of fan variation when institute using the inertia of blower itself and discharges kinetic energy, participates in electricity
The recovery of net frequency；When the start and stop sequence and inertia control of the more Fans of the blower inertia control unit coordinated control wind field
Between, trigger controller make Wind turbines maintain certain time secondary power output, controlled by blower order of packets, reduce compared with
Big power swing.
The present invention still further comprises following preferred embodiment:
The control system that wind power plant participates in primary frequency modulation further includes telecontrol communication unit, and the telecontrol communication unit is on the one hand
Active, the fan condition information by blower needed for various communication protocols access wind power plant participation primary frequency modulation, on the other hand also
Data communication is carried out by IEC60870-5-101, IEC60870-5-104, CDT kind telecontrol communication specification and dispatching terminal.
The control system that the wind power plant participates in primary frequency modulation further includes analysis unit, and analysis unit uses thing
Part trigger mechanism, when wind power plant participates in primary frequency modulation movement, control system triggers the analysis unit starting recording, note
The record movement period collects station bus frequency, the wind power plant curves such as hair active power, wind power plant target active power in fact, and uploads
Analysis system carries out the assay of the movement index such as primary frequency modulation actuation time, frequency amplitude of variation.
The control system that the wind power plant participates in primary frequency modulation further includes frequency disturbance unit, when primary frequency modulation control system
Work, by frequency disturbance unit using the frequency disturbance data file being generated in advance, is realized in wind-powered electricity generation field frequency in off-line mode
Offer frequency disturbance signal under rate nominal situation.
Disclosed herein as well is the implementation methods that a kind of wind power plant participates in primary frequency modulation control, which is characterized in that the control
Method processed the following steps are included:
Step 1: acquiring wind power plant in real time by signal acquisition unit and collect station bus frequency signal；
Step 2: station bus frequency signal being collected according to the wind power plant that step 1 acquires, wind power plant is calculated and collects station bus frequency
Deviation between rate and bus frequency targets value；
Step 3: by tele-control communication module, receiving scheduling active power target instruction target word P；
Step 4: whether the frequency departure for judging that wind power plant is collected between station bus frequency and bus frequency targets value is less than
Primary frequency modulation dead zone, if so, entering step 7；Otherwise 5 are entered step；
Step 5: calculating the active P of wind power plant target that Wind turbines carry out primary frequency modulation according to the following formulatarget:
Δ f=f0-fs (1)
Ptarget=P+ Δ P (3)
Wherein, P is the current active power target instruction target word of dispatching down distributing wind power plant, PtargetFor the wind-powered electricity generation after primary frequency modulation
Field target is active；Δ f is foCollect the frequency departure between station bus frequency and bus frequency targets value for wind power plant；foFor volume
Determine frequency i.e. bus frequency targets value；fsTo collect station bus frequency；K1, K2 are respectively adjustment factor；Δ P is to be changed by frequency
Caused active correction amount；
Step 6: working as Ptarget≤ PmaxWhen, then by the active P of wind power plant targettargetIt is handed down to wind farm monitoring system, it is real
Now the primary frequency modulation of Wind turbines is acted；Simultaneously trigger analysis unit starting recording, to collect station bus frequency, wind-powered electricity generation
Real hair active power, wind power plant target active power carry out recording, when according to recorder data to the movement of this primary frequency modulation
Between, the recovery amplitude of frequency and other effects is analyzed and evaluated；
Work as Ptarget>Pmax, then 7 couples of active P of wind power plant target are gone to steptargetIt is modified；
Wherein, PmaxFor the maximum rated power output of wind power plant；
Step 7: calculating the rotation function of Wind turbines, participate in primary frequency modulation control pair using the rotation function of Wind turbines
The active P of wind power plant targettargetIt is modified；
It contributes under operating condition in limit, Wind turbines are with lasting active power deposit to the ability with primary frequency modulation；
Under declared working condition, Wind turbines can discharge kinetic energy by the inertia of storage, increase the output power of Wind turbines, to mention
For the control ability of system primary frequency modulation；
Step 8: by the revised active P ' of wind power plant target of step 7targetIt is handed down to wind power plant EMS monitoring
System controls wind turbine by wind farm monitoring system, realizes the adjustment that wind power plant is sent out active in fact.
The present invention further comprises following preferred embodiment:
In step 2, when the work of wind power plant plant stand grade active power controller system is in off-line mode, wind power plant collects station
Bus frequency signal is provided by off-line test unit frequency disturbing signal；Before wind-powered electricity generation scene carries out primary frequency modulation test, use
The frequency disturbance data file being generated in advance realizes the frequency disturbance effect under frequency nominal situation, carries out wind power plant plant stand
The action response of grade active power controller system primary frequency function and functional test.
In steps of 5, the value of adjustment factor K1 and the dynamic responding speed of adjusting are related, can use wind power plant rated capacity
0%~30%, or according to user requirement be arranged；The value of adjustment factor K2 and the ability of wind power plant primary frequency modulation have
It closes, can use the 0%~40% of wind power plant rated capacity, or be arranged according to the requirement of user.
In step 7, primary frequency modulation is participated in using the rotation function of Wind turbines control P active to wind power plant targettarget
It is modified including the following contents:
7.1: the rotation function having when calculating running of wind generating set:
Wherein, E is the rotation function that Wind turbines have, and J is rotary inertia, ωrFor the revolving speed of Wind turbines；
7.2: calculate the time constant of Wind turbines rotary inertia:
ωrsFor the rated speed of Wind turbines；H is rotary inertia time constant；The rated capacity of S expression Wind turbines；
7.3: calculating since the rotation function that the variation Wind turbines of revolving speed discharge is
ωr0Indicate Wind turbines initial speed, ωr1The final revolving speed of blower after indicating release rotation function；
Formula (5) are substituted into formula (6), and the revolving speed of Wind turbines is converted to the per unit value being worth on the basis of synchronous speed,
Obtain the rotation function that Wind turbines are discharged due to rotation speed change are as follows:
Wherein ωr0*Indicate the per unit value of Wind turbines initial speed, ωr1*Indicate the mark of the final revolving speed of Wind turbines
Value；
7.4: after primary frequency modulation action signal, by formula (8) P active to wind power plant targettargetIt is modified, is corrected
The active P ' of wind power plant target afterwardstarget, wherein K is power coefficient；
P′target=Ptarget+ΔE*K (8)
Wherein, power coefficient K can realize that blower inertia manually adjusts, and value range can be 0.7~1.0.
It in step 8, can be directly under single machine for supporting to provide the wind power plant EMS monitoring system of single machine control interface
Send out control instruction.
The application has the advantages that
Under the premise of wind power plant automated system has, it is not required to increase the equipment such as energy storage, had both considered frequency droop control
System, and the inertia for blower being utilized itself, participate in the primary adjustment of power system frequency to the maximum extent, have practicability.
Detailed description of the invention
Fig. 1 is that wind power plant disclosed in the present application participates in primary frequency modulation control system architecture schematic diagram；
Fig. 2 is that wind power plant disclosed in the present application participates in primary frequency modulation control method flow diagram；
Fig. 3 is separate unit Wind turbines output power schematic diagram；
Fig. 4 is different Wind turbines output power schematic diagrames.
Specific embodiment
Technical solution of the present invention is further illustrated with example with reference to the accompanying drawing.
Primary frequency modulation control system architecture schematic diagram is participated in as shown in Figure 1 for wind power plant.The system realizes wind power plant factory
Station level participates in primary frequency modulation, is made of wind power plant plant stand grade active power tuning controller, specifically includes signal acquisition unit, one
Secondary frequency modulation processing unit, blower inertia processing unit, blower inertia control unit, tele-control communication module, analysis unit, frequency
Rate disturbs unit etc. and constitutes.Signal acquisition unit is directly acquired by hardwire collects station bus frequency signal；Telemechanical communication unit
It is first on the one hand by with wind farm monitoring system communication interaction data, realize issuing for information access and active target instruction target word,
On the other hand realize that telemechanical communicates with control centre；System support directly issues active target instruction target word and supports to blower, while also
Active target instruction target word is issued to wind energy turbine set EMS system.
Signal acquisition unit, primary frequency modulation processing unit, blower inertia computing unit, blower inertia control unit, telemechanical
Communication unit, analysis unit, frequency disturbance unit are connected with wind power plant plant stand grade Active Power Controller.The signal
Acquisition unit acquires wind power plant in real time and collects station bus power and frequency signal, and acquisition signal is uploaded to primary frequency modulation processing
Unit.The primary frequency modulation processing unit collects the departure of station bus frequency and rated frequency according to the wind power plant acquired in real time
The active power of wind power field target of the received dispatching down distributing of wind power plant plant stand grade Active Power Controller is modified, and will be repaired
Active power of wind power field target value after just transmits fan inertia computing unit.The blower inertia computing unit, to primary
The active target value of the revised wind power plant of frequency modulation processing unit is corrected again, calculates the releasable rotation of rotation speed of fan variation when institute
Rotation energy discharges kinetic energy, participates in the recovery of mains frequency using the inertia of blower itself；The blower inertia control unit association
The start and stop sequence and inertia control time, trigger controller for regulating and controlling the more Fans of wind field processed make Wind turbines maintain certain time
Secondary power output, is controlled by blower order of packets, reduces biggish power swing.
On the one hand the telecontrol communication unit accesses wind needed for wind power plant participates in primary frequency modulation by various communication protocols
Machine is active, fan condition information, on the other hand also passes through IEC60870-5-101, IEC60870-5-104, CDT kind telecontrol communication
Specification and dispatching terminal carry out data communication.
The control system that the wind power plant participates in primary frequency modulation further includes analysis unit, and analysis unit uses thing
Part trigger mechanism, when wind power plant participates in primary frequency modulation movement, control system triggers the analysis unit starting recording, note
The record movement period collects station bus frequency, the wind power plant curves such as hair active power, wind power plant target active power in fact, and uploads
Analysis system carries out the assay of the movement index such as primary frequency modulation actuation time, frequency amplitude of variation.
The control system that the wind power plant participates in primary frequency modulation further includes frequency disturbance unit, when primary frequency modulation control system
Work, by frequency disturbance unit using the frequency disturbance data file being generated in advance, is realized in wind-powered electricity generation field frequency in off-line mode
Offer frequency disturbance signal under rate nominal situation.
It is illustrated in figure 2 the flow diagram that the implementation method of primary frequency modulation control is participated in based on wind power plant plant stand grade.
Step 1: realizing the acquisition and processing for collecting station high voltage bus frequency to wind power plant by signal acquisition unit, hand over
It flows sampling module and 4 road alternating voltage, 4 road alternating current channel is provided, main wind power plant of completing collects station high voltage bus A, B, C phase
The frequency signal of effective value, A, B, C three phases active power and reactive power, A, B, C three-phase voltage current acquires function
Energy.
Step 2: collecting station bus frequency signal according to the wind power plant that the first step acquires, calculates wind power plant and collect station bus
Deviation between frequency and bus frequency targets value；When wind power plant plant stand grade active power controller system works in off-line mode
When, wind power plant is collected station bus frequency signal and is provided by off-line test unit frequency disturbing signal；It is carried out at wind-powered electricity generation scene primary
Before frequency modulation test, using the frequency disturbance data file being generated in advance, the frequency disturbance effect under frequency nominal situation is realized,
Carry out action response and the functional test of wind power plant plant stand grade active power controller system primary frequency function.
Step 3: being realized in wind power plant plant stand grade active power controller system and higher level's scheduling by tele-control communication module
Telemechanical communication function in the heart, the online wind park target active command P for receiving scheduling；It realizes between wind farm monitoring system
Information access function.Step 4: judging that wind power plant collects the frequency departure between station bus frequency and bus frequency targets value
Whether primary frequency modulation dead zone is less than, if so, into the 7th step；Otherwise enter the 5th step；Step 5: being obtained first according to measurement
Frequency deviation f=f0-fs, when | Δ f | when being greater than primary frequency modulation dead zone, become using system frequency change rate and system frequency
Change amount obtains excess power as the input of frequency controller and is added in target active power, is shown below:
Ptarget=P+ Δ P (2)
Come simulated inertia response and frequency droop control by this method, wherein P is the current wattful power of dispatching down distributing
Rate instruction, PtargetIt is active for wind power plant target after primary frequency modulation amendment；Pmax is the maximum rated power output of wind power plant；Fo is specified
Frequency；Fs is system frequency；K1, K2 are respectively adjustment factor, and the value of adjustment factor K1 and the dynamic responding speed of adjusting have
It closes, can use the 0%~30% of wind power plant rated capacity, or be arranged according to the requirement of user；The value and wind of adjustment factor K2
The ability of electric field primary frequency modulation is related, can use the 0%~40% of wind power plant rated capacity, or be arranged according to the requirement of user；
Δ P is active correction amount caused by being changed by frequency.
Step 6: working as Ptarget≤ PmaxWhen, then by the active P of wind power plant targettargetIt is handed down to wind farm monitoring system, it is real
Now the primary frequency modulation of Wind turbines is acted；Simultaneously trigger analysis unit starting recording, to collect station bus frequency, wind-powered electricity generation
Real hair active power, wind power plant target active power carry out recording, when according to recorder data to the movement of this primary frequency modulation
Between, the recovery amplitude of frequency and other effects is analyzed and evaluated；
Work as Ptarget>Pmax, then turn the 7th step P active to wind power plant targettargetIt is modified；
Wherein, PmaxFor the maximum rated power output of wind power plant；
Step 7: calculating the rotation function of Wind turbines, primary frequency modulation is participated in using the rotation function of Wind turbines and is controlled
P active to wind power plant targettargetIt is modified；
It contributes under operating condition in limit, Wind turbines are with lasting active power deposit to the ability with primary frequency modulation；
Under declared working condition, Wind turbines can discharge kinetic energy by the inertia of storage, increase the output power of Wind turbines, to mention
For the control ability of system primary frequency modulation；
In order to which the frequency control to Wind turbines carries out quantitative analysis, make full use of the rotor kinetic energy of Wind turbines to system
Frequency is controlled, the operating status according to Wind turbines is needed, by the inertia time constant and Wind turbines of Wind turbines
Variable-speed operation range computation Wind turbines can use rotation function.From the angle of energy and power, variable-speed wind-power unit is calculated
Rotation function under different wind friction velocities.
7.1st step: the rotation function having when calculating running of wind generating set:
Wherein E is the energy unit J that Wind turbines have, and J is rotary inertia units/kg * m2, ωrFor turning for Wind turbines
Fast unit rad/s.
7.2nd step: the time constant of Wind turbines rotary inertia is calculated:
ωrsFor the rated speed of wind power generator rotor.H is rotary inertia time constant, and S indicates the specified of Wind turbines
Capacity.
7.3rd step: it calculates since the rotation function that the variation Wind turbines of revolving speed discharge is
Formula (4) are substituted into formula (5), and the revolving speed of Wind turbines is converted to the per unit value being worth on the basis of synchronous speed,
The rotation function that available Wind turbines are discharged due to rotation speed change are as follows:
Wherein ωr0*Indicate the per unit value of Wind turbines initial speed, ωr1*Indicate the mark of the final revolving speed of Wind turbines
Value.
7.4th step: after primary frequency modulation action signal, by formula (8) P active to wind power plant targettargetIt is modified, obtains
The revised active P ' of wind power plant targettarget, wherein K is power coefficient；
P′target=Ptarget+ΔE*K (8)
Wherein, power coefficient K can realize that blower inertia manually adjusts, and value range can be 0.7~1.0.
Measuring system frequency, after primary frequency modulation action signal, control blower output power is constant (such as in the output of blower
Increase by 10% power on power and continue 10s).The output power waveform of blower is as shown in Fig. 3.
On the other hand, for wind power generating set different in wind power plant, in order to avoid all units accelerate from decelerating to
Process causes biggish changed power, is grouped to the wind power generating set of wind field, and is continued using different frequency control
Time, so that reduce wind power plant reduces from the power decelerated in acceleration handoff procedure, different wind power generating set output works
Rate is as shown in Fig. 4.When meeting primary frequency modulation action triggers condition, the first grouping blower hoisting power 10%, actuation time is held
Continuous 10s, then power output is reduced to the 95% of nominal output, returns to normal value after continuing setting time；Second packet receives once
Frequency modulation action triggers signal repeats above-mentioned control strategy after postponing 1s；Subsequent grouping successively acts；
Step 8: the revised active P ' of wind power plant target of primary frequency modulationtarget, it is handed down to wind power plant EMS monitoring system,
Wind turbine is controlled by wind farm monitoring system, the adjustment that wind power plant is sent out active in fact is realized, to realize primary frequency modulation；For branch
It holds and the system of single machine control interface is provided, control instruction directly can be issued to single machine.
Applicant combines Figure of description to be described in detail and describe the embodiment of the present invention, but this field skill
Art personnel are it should be understood that above embodiments are only the preferred embodiments of the invention, and explanation is intended merely to help reader in detail
More fully understand spirit of that invention, and it is not intended to limit the protection scope of the present invention, on the contrary, any based on invention essence of the invention
Any improvement or modification made by mind should all be fallen within the scope and spirit of the invention.
Claims (10)
1. a kind of wind power plant participates in the control system of primary frequency modulation, including signal acquisition unit, primary frequency modulation processing unit, blower
Inertia computing unit, blower inertia control unit, wind power plant plant stand grade Active Power Controller；It is characterized by:
Signal acquisition unit, primary frequency modulation processing unit, blower inertia computing unit, blower inertia control unit, telemechanical communication
Unit, analysis unit, frequency disturbance unit are connected with wind power plant plant stand grade Active Power Controller；
The signal acquisition unit acquires wind power plant in real time and collects station bus power and frequency signal, and acquisition signal is uploaded to
Primary frequency modulation processing unit；
The primary frequency modulation processing unit collects the departure of station bus frequency and rated frequency according to the wind power plant acquired in real time
The active power of wind power field target of the received dispatching down distributing of wind power plant plant stand grade Active Power Controller is modified, and will be repaired
Active power of wind power field target value after just transmits fan inertia computing unit；
The blower inertia computing unit carries out again the revised active power of wind power field target value of primary frequency modulation processing unit
Amendment calculates the releasable rotation function of rotation speed of fan variation when institute using the inertia of blower itself and discharges rotation function, ginseng
With the recovery of mains frequency；The start and stop sequence of the more Fans of the blower inertia control unit coordinated control wind power plant and inertia control
Time processed, triggering wind power plant plant stand grade Active Power Controller make Wind turbines maintain the secondary power output of certain time, lead to
The control of blower order of packets is crossed, biggish power swing is reduced.
2. the control system that a kind of wind power plant according to claim 1 participates in primary frequency modulation, it is characterised in that:
The control system that wind power plant participates in primary frequency modulation further includes tele-control communication module, on the one hand the tele-control communication module passes through
Blower needed for various communication protocols access wind power plants participate in primary frequency modulations is active, fan condition information, on the other hand also passes through
IEC60870-5-101, IEC60870-5-104, CDT telecontrol communication specification and dispatching terminal carry out data communication.
3. the control system that a kind of wind power plant according to claim 2 participates in primary frequency modulation, it is characterised in that:
The control system that the wind power plant participates in primary frequency modulation further includes analysis unit, and analysis unit is touched using event
Hair mechanism, when wind power plant participates in primary frequency modulation movement, control system triggers the analysis unit starting recording, and record is dynamic
The wind power plant for making the period collects station bus frequency, wind power plant sends out active power, active power of wind power field target value curve in fact, and on
Analysis system is passed, the assay of primary frequency modulation actuation time, frequency amplitude of variation movement index are carried out.
4. the control system that a kind of wind power plant according to claim 1 or 3 participates in primary frequency modulation, it is characterised in that:
The control system that the wind power plant participates in primary frequency modulation further includes frequency disturbance unit, when control system works in offline mould
When formula, by frequency disturbance unit using the frequency disturbance data file being generated in advance, realize under wind-powered electricity generation field frequencies range nominal situation
Offer frequency disturbance signal.
5. the implementation method that a kind of wind power plant participates in primary frequency modulation control, which is characterized in that the implementation method includes following step
It is rapid:
Step 1: acquiring wind power plant in real time by signal acquisition unit and collect station bus frequency signal；
Step 2: according to step 1 acquire wind power plant collect station bus frequency signal, calculate wind power plant collect station bus frequency with
Deviation between bus frequency targets value；
Step 3: by tele-control communication module, receiving scheduling active power target instruction target word P；
Step 4: whether the frequency departure for judging that wind power plant is collected between station bus frequency and bus frequency targets value is less than once
Regulation dead-band, if so, entering step 7；Otherwise 5 are entered step；
Step 5: calculating the active P of wind power plant target that Wind turbines carry out primary frequency modulation according to the following formulatarget:
Δ f=f0-fs (1)
Ptarget=P+ Δ P (3)
Wherein, P is the current active power target instruction target word of dispatching down distributing wind power plant, PtargetFor the wind power plant mesh after primary frequency modulation
Indicate function；Δ f is that wind power plant collects the frequency departure stood between bus frequency and bus frequency targets value；foIt is for rated frequency
Bus frequency targets value；fsTo collect station bus frequency；K1, K2 are respectively adjustment factor；Δ P is to have caused by being changed as frequency
Function correction amount；
Step 6: working as Ptarget≤ PmaxWhen, then by the active P of wind power plant targettargetIt is handed down to wind farm monitoring system, realization pair
The primary frequency modulation of Wind turbines acts；Analysis unit starting recording is triggered simultaneously, station bus frequency, wind are collected to wind power plant
Hair active power, wind power plant target active power carry out recording, the movement according to recorder data to this primary frequency modulation to electric field in fact
Time, frequency recovery amplitude be analyzed and evaluated；
Work as Ptarget>Pmax, then 7 couples of active P of wind power plant target are gone to steptargetIt is modified；
Wherein, PmaxFor the maximum rated power output of wind power plant；
Step 7: calculating the rotation function of Wind turbines, participate in primary frequency modulation using the rotation function of Wind turbines and control to wind-powered electricity generation
The field active P of targettargetIt is modified；
It contributes under operating condition in limit, Wind turbines are with lasting active power deposit to the ability with primary frequency modulation；In volume
Determine under operating condition, Wind turbines can discharge rotation function by the inertia of storage, increase the output power of Wind turbines, to mention
The control ability of high system primary frequency modulation；
Step 8: by the revised active P ' of wind power plant target of step 7targetIt is handed down to wind farm monitoring system, is supervised by wind power plant
Control system controls wind turbine, realizes the adjustment that wind power plant is sent out active in fact.
6. the implementation method that wind power plant according to claim 5 participates in primary frequency modulation control, it is characterised in that:
In step 2, when the work of wind power plant plant stand grade active power controller system is in off-line mode, wind power plant collects station bus
Frequency signal is provided by off-line test unit frequency disturbing signal；Before wind-powered electricity generation scene carries out primary frequency modulation test, using prior
The frequency disturbance data file of generation realizes the frequency disturbance effect under frequency nominal situation, and carrying out wind power plant plant stand grade has
The action response of function power control system primary frequency function and functional test.
7. the implementation method that wind power plant according to claim 5 participates in primary frequency modulation control, it is characterised in that:
In steps of 5, the value of adjustment factor K1 and the dynamic responding speed of adjusting are related, take the 0% of wind power plant rated capacity
~30%, or be arranged according to the requirement of user.
8. the implementation method that wind power plant according to claim 7 participates in primary frequency modulation control, it is characterised in that:
In steps of 5, the value of adjustment factor K2 is related with the ability of wind power plant primary frequency modulation, takes wind power plant rated capacity
0%~40%, or be arranged according to the requirement of user.
9. the implementation method that wind power plant according to claim 5 participates in primary frequency modulation control, it is characterised in that:
In step 7, primary frequency modulation is participated in using the rotation function of Wind turbines control P active to wind power plant targettargetIt carries out
Amendment includes the following contents:
7.1: the rotation function having when calculating running of wind generating set:
Wherein, E is the rotation function that Wind turbines have, and J is rotary inertia, ωrFor the revolving speed of Wind turbines；
7.2: calculate the time constant of Wind turbines rotary inertia:
ωrsFor the rated speed of Wind turbines；H is rotary inertia time constant；The rated capacity of S expression Wind turbines；
7.3: calculating since the rotation function that the variation Wind turbines of revolving speed discharge is
ωr0Indicate Wind turbines initial speed, ωr1The final revolving speed of blower after indicating release rotation function；
Formula (5) are substituted into formula (6), and the revolving speed of Wind turbines is converted to the per unit value being worth on the basis of synchronous speed, are obtained
The rotation function that Wind turbines are discharged due to rotation speed change are as follows:
Wherein ωr0*Indicate the per unit value of Wind turbines initial speed, ωr1*Indicate the per unit value of the final revolving speed of Wind turbines；
7.4: after primary frequency modulation action signal, by formula (8) P active to wind power plant targettargetIt is modified, obtains revised
The active P ' of wind power plant targettarget, wherein K is power coefficient；
P′target=Ptarget+ΔE*K (8)
Wherein, power coefficient K can realize that blower inertia manually adjusts, and value range can be 0.7~1.0.
10. the implementation method that wind power plant according to claim 5 participates in primary frequency modulation control, it is characterised in that:
In step 8, for supporting to provide the wind farm monitoring system of single machine control interface, control directly can be issued to single machine and referred to
It enables.
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