CN109473997A - A kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control - Google Patents
A kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control Download PDFInfo
- Publication number
- CN109473997A CN109473997A CN201811502666.1A CN201811502666A CN109473997A CN 109473997 A CN109473997 A CN 109473997A CN 201811502666 A CN201811502666 A CN 201811502666A CN 109473997 A CN109473997 A CN 109473997A
- Authority
- CN
- China
- Prior art keywords
- rotor
- double
- current
- power
- fan motor
- 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.)
- Pending
Links
Classifications
-
- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
A kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control disclosed by the invention, the sub-synchronous oscillation suppression method is the following steps are included: step 1: establishing double-fed fan motor field grid-connected system Perturbation Analysis model；Step 2: calculating system electrical damping characteristic under different electric network compositions and the method for operation；Step 3: surveying the stator current of Wind turbines, and be filtered；Step 4: optimizing application algorithm coordinates and optimizes the proportionality coefficient of static synchronous compensator control parameter and fan rotor side additional damping controller.
Description
Technical field
The present invention relates to wind-electricity integration technical fields, same more particularly to the double-fed fan motor play based on source net Collaborative Control
Walk oscillation suppression method.
Background technique
In recent years, China's installed capacity of wind-driven power is continuously increased, since wind energy has the characteristics that regional, wind energy resources and negative
Lotus center is integrally in contrary distribution, therefore the Wind Power Generation mode in China is mainly the large-scale wind power format of field of centralization, and
And multiple land wind power bases need to be electrically accessed power grid, large capacity, remote wind-powered electricity generation are sent outside far from load center through remote conveying
It is imperative.Therefore, string benefit technology and high voltage dc transmission technology are the major techniques that large-scale wind power base is sent out at a distance
Means.
Sub-synchronous oscillation be between two power systems under one or more natural frequencies lower than system synchronizing frequency
Carry out the interaction of significant energy exchange.The sub-synchronous oscillation problem that wind-electricity integration causes is more prominent, by the study found that
Wind power plant and serial supplementary line, HVDC or being connected with for weak AC system may result in sub-synchronous oscillation problem, to wind
Machine and network system generate biggish harm, influence the safe and stable operation of entire power grid.In October, 2009, Texas ,Usa
In the 345kV transmission system in state, is sent out because broken string causes wind power plant directly to mend circuit through string, cause double-fed fan motor field 20Hz or so
Subsynchronous resonance, cause a large amount of unit chasers and crowbar circuit to damage.In December, 2012, North China, China it is big
Type wind power plant also repeatedly has occurred string and mends the subsynchronous resonance phenomenon caused, frequency of oscillation 6-8Hz.The Hami area in China
Increasingly complex extensive double-fed has occurred and exchanges time sent out with extra-high voltage direct-current system in day through weak with directly driven wind-powered unit
Synchronized oscillation problem.Wind power plant sub-synchronous oscillation, which has become, restricts wind farm grid-connected Key Scientific And Technical Problems, and there is an urgent need to grind
The braking measure of effective wind power plant sub-synchronous oscillation is studied carefully, to guarantee that the safety and stability of extensive new energy consumption and electric system is transported
Row.
Therefore it needs to establish the double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control existing to solve
The problem of technology.
Summary of the invention
A kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control disclosed by the invention, described time
Synchronized oscillation suppressing method the following steps are included:
Step 1: establishing double-fed fan motor field grid-connected system Perturbation Analysis model；
Step 2: calculating system electrical damping characteristic under different electric network compositions and the method for operation；
Step 3: surveying the stator current of Wind turbines, and be filtered；
Step 4: optimizing application algorithm coordinates and optimizes static synchronous compensator control parameter and fan rotor side additional damping
The proportionality coefficient of controller.
Preferably, the System Small Disturbance analysis model of the step 1 include: double-fed blower model, wind energy conversion system shafting model,
Element is connected into system by converter control system model, static synchronous compensator model and model of power transmission system, the step 1
And linearized, form Perturbation Analysis model.
Preferably, the double-fed blower model of the step 1 is established by following steps: in dual-feed asynchronous wind power generator
Stator and rotor have all selected Motor convention, and positive direction is electric current inflow direction, the positive direction of direction of rotation and electromagnetic torque
Unanimously, by the stator and rotor of dual-feed asynchronous wind power generator Current Voltage and magnetic flux variable from ABC coordinate transform to dq0
Coordinate system obtains dependent equation such as formula (1)-(4) of the voltage of stator and rotor, magnetic linkage and torque in dq0 coordinate:
Wherein us,ur,is,irRespectively stator voltage, rotor voltage, stator current and rotor current, ψs,ψrIt is respectively fixed
The magnetic linkage of son and rotor, subscript d, q respectively indicate the d axis component and q axis component of corresponding physical quantity, and p indicates differential operator, LsTable
Show stator winding self-induction, LrFor rotor windings self-induction, RsFor stator winding resistance, RrIndicate rotor windings resistance, LmFor rotor with
Mutual inductance between stator winding, ω, ω2Respectively power network current angular frequency and rotor current angular frequency.
Preferably, the wind energy conversion system shafting model of the step 1 is established by following steps: the rigidity of wind turbine shaft compares
Low, double mass shafting models, which can be used, indicates wind turbine shaft machine driven system, i.e., gear-box and wind energy conversion system is equivalent to one
Mass block, and the quality very little of gear-box, do not consider its influence substantially, another mass is equivalent by generator, and formula (5) is
The expression formula of the differential equation group of wind energy conversion system shafting model:
Wherein, HgAnd HtIndicate the inertia time constant of generator and blower；wrIndicate generator speed, w1For wind energy conversion system
Revolving speed；TwIndicate the mechanical output torque of wind energy conversion system；TeFor the electromagnetic torque of generator；Dg、Dt、DtgRespectively shafting, power generation
The damped coefficient of machine and wind energy conversion system；KtgIndicate axis rigidity coefficient, unit pu/rad.
Preferably, the converter control system model of the step 1 is established by following steps: rotor-side converter is to nothing
Function voltage is controlled, and controller is made of current control inner ring and power control outer loop, and stator voltage q axis is being taken to orient
In the case where, the active and reactive power of dual-feed asynchronous wind power generator also obtains Approximate Decoupling, i.e., double-fed asynchronous wind-force hair
The active power of motor can be controlled by rotor current q axis component, and reactive power can be controlled by the d axis component of rotor current
System, the current control inner ring of rotor-side converter realize that the decoupling control of watt current and exciting current, power outer ring are electric current
Inner ring provides reference current；
When sub-synchronous oscillation occurs, double feedback electric engine stator current can be accompanied by oscillatory occurences, extract disturbing for stator current
Dynamic component, is fed back in rotor side controller, such system can become positive impedance characteristic from original negative resistance character.For fan rotor side additional longitudinal forces parameter.In order to eliminate the influence of steady-state DC component, high-pass filter can be used.
Due under power frequency, the output of dq coordinate is DC component, and after high-pass filtering, power frequency component is without output, therefore additional damping control
System will not influence power frequency transmission function.GHPFIndicate bivalent high-pass filter transmission function, ωnIndicate natural angular frequency, then
Have:
Grid side converter controls the active power flowed through, and maintains the stabilization of dc-link capacitance voltage, in order to make net
Converter fortune in side is run with unity power factor, sets zero for the definite value of reactive power, double-fed blower total power factor passes through
Rotor-side converter reactive power given value is controlled to realize, controller controls outer ring and current control inner ring structure by voltage
At.
Preferably, the static synchronous compensator model of the step 1, wherein static synchronous compensator is absorbed and is generated idle
Power is a kind of parallel reactive power compensator, and static synchronous compensator model is made of three major parts: DC side is with electricity
The voltage source of container is against parallel operation, auto-transformer and control system；
Static synchronous compensator controls modulation ratio m and phase angle δ according to busbar voltage fluctuation and generates trigger pulse, and dynamic is mended
System reactive power is repaid, equation of the static synchronous compensator under dq coordinate system such as formula (6):
Wherein, w0For angular frequency；XsAnd RsFor the leakage reactance and bleeder resistance of auto-transformer；isdAnd isqRespectively dq is sat
Current component under mark system；RcIt is the bleeder resistance of shunt capacitor；udcFor condenser voltage；
The reactive power output of compensator can change the voltage at controller control point in the voltage range allowed.It is static
Synchronous compensator device can control the Trigger Angle of inverter, to realize fast modulation reactive power.
Preferably, the specific steps for calculating electrical damping under different electric network compositions and the method for operation of the step 2:
Step 2.1: apply the microvariations torque of a synchronizing frequency λ on the rotor of double-fed blower:
Δ T=Acos2 π λ t；
Step 2.2: when system operation is again at stable state, recording generator's power and angle δ, the electromagnetism of same period
Torque TeWith angular speed wλ；
Step 2.3: to δ, Te, w carries out spectrum analysis to get λ correspondingIt is calculated electrical
Elastic torque coefficient and electrical damping torque coefficient.
Preferably, the static synchronous compensator control parameter of the step 4 and fan rotor side additional damping controller ginseng
Number coordination optimization specific steps:
Optimization algorithm fitness function are as follows:
Wherein, λ value between 5-45hz, parameter optimization is using particle swarm optimization algorithm, particle swarm optimization algorithm
It is a kind of evolutionary computing based on swarm intelligence, has the characteristics that parallel processing, robustness are good, can be found with greater probability
The globally optimal solution of problem, and computational efficiency is higher than traditional random device.Its maximum advantage is simple easily realization, convergence speed
Degree is fast.
The invention discloses a kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control, this method
Source side control system of wind turbines parameter and grid side reactive power compensator have been comprehensively considered to the shadow of sub-synchronous oscillation characteristic
It rings, inhibits sub-synchronous oscillation by way of Collaborative Control, it is horizontal to improve power system dynamic stability.
Detailed description of the invention
Fig. 1 is static synchronous compensator control parameter and the fan rotor side additional damping controller parameter coordination principle of optimality
Figure.
Fig. 2 is the system schematic of dual-feed asynchronous wind power generator.
Fig. 3 is wind farm grid-connected system model schematic diagram.
Fig. 4 is static synchronous compensator structural schematic diagram.
Fig. 5 is static synchronous compensator DC/AC voltage control block diagram.
Fig. 6 is rotor-side convertor controls schematic illustration.
Fig. 7 is grid side converter control principle schematic diagram.
Fig. 8 is double-fed fan rotor side additional longitudinal forces schematic illustration.
Fig. 9 is particle swarm optimization algorithm flow chart.
Train power output curve figure when Figure 10 is unchecked measure.
Figure 11 is train power output curve figure before coordinating and optimizing.
Figure 12 is train power output curve figure after coordination optimization.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label indicate same or similar element or element with the same or similar functions.Described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in Figure 1, the double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control the following steps are included:
Step 1: establishing double-fed fan motor field grid-connected system Perturbation Analysis model；
The System Small Disturbance analysis model of the step 1 includes: double-fed blower model, wind energy conversion system shafting model, converter
Element is connected into system and carried out by control system model, static synchronous compensator model and model of power transmission system, the step 1
Linearisation forms Perturbation Analysis model.
The double-fed blower model of the step 1 as shown in Figure 2 is established by following steps: in dual-feed asynchronous wind power generator
Stator and rotor all selected Motor convention, positive direction is electric current inflow direction, the pros of direction of rotation and electromagnetic torque
To consistent, by the stator and rotor of dual-feed asynchronous wind power generator Current Voltage and magnetic flux variable from ABC coordinate transform to
Dq0 coordinate system obtains dependent equation such as formula (1)-(4) of the voltage of stator and rotor, magnetic linkage and torque in dq0 coordinate:
Wherein us,ur,is,irRespectively stator, rotor voltage and stator, rotor current, ψs,ψrRespectively stator and rotor
Magnetic linkage, subscript d, q respectively indicate the d axis component and q axis component of corresponding physical quantity, and p indicates differential operator, LsIndicate stator around
Group self-induction, LrFor rotor windings self-induction, RsFor stator winding resistance, RrIndicate rotor windings resistance, LmFor rotor and stator winding
Between mutual inductance, ω, ω2Respectively power network current angular frequency and rotor current angular frequency.
The wind energy conversion system shafting model of the step 1 is established by following steps: the rigidity of wind turbine shaft is relatively low, can adopt
Its machine driven system is indicated with double mass shafting models, i.e., gear-box and wind energy conversion system is equivalent to a mass block, and tooth
The quality very little of roller box, does not consider its influence substantially, another mass is equivalent by generator, and formula (5) is wind energy conversion system shafting mould
The expression formula of the differential equation group of type:
Wherein, HgAnd HtIndicate the inertia time constant of generator and blower；wrIndicate generator speed, w1For wind energy conversion system
Revolving speed；TwIndicate the mechanical output torque of wind energy conversion system；TeFor the electromagnetic torque of generator；Dg、Dt、DtgRespectively shafting, power generation
The damped coefficient of machine and wind energy conversion system；KtgIndicate axis rigidity coefficient, unit pu/rad, other values use per unit value.
As shown in fig. 6, the main purpose of rotor-side converter (RSC) is to realize the control to reactive voltage.Entire control
Device processed is made of current control inner ring and power control outer loop.If not considering stator resistance, stator voltage q axis is being taken
In the case where orientation, the active and reactive power of dual-feed asynchronous wind power generator also obtains Approximate Decoupling, i.e., double-fed asynchronous wind
The active power of power generator can be controlled by rotor current q axis component, and reactive power can pass through the d axis component of rotor current
To control.The current control inner ring of controller realizes that the decoupling control of watt current and exciting current, power outer ring are in electric current
Ring provides reference current.
When sub-synchronous oscillation occurs, double feedback electric engine stator current can be accompanied by oscillatory occurences, additional resistance used herein
Buddhist nun's control is fed back in rotor side controller, such system can be by as shown in figure 8, extract the disturbance component of stator current
Original negative resistance character becomes positive impedance characteristic.For fan rotor side additional longitudinal forces parameter.It is straight in order to eliminate stable state
The influence of flow component, can be used high-pass filter.Since under power frequency, the output of dq coordinate is DC component, after high-pass filtering,
Power frequency component is without output, therefore additional longitudinal forces will not influence power frequency transmission function.GHPFIndicate bivalent high-pass filter transmitting
Function, ωnIndicate natural angular frequency, then having:
As shown in fig. 7, grid side converter (GSC) control flows through its active power, and maintain dc-link capacitance electricity
The stabilization of pressure.It is run to transport grid side converter with unity power factor, zero can be set by the definite value of reactive power.It is double
Blower total power factor is presented, can be realized by control rotor-side converter reactive power given value.Its controller is by voltage control
Outer ring processed and current control inner ring are constituted.
As shown in figure 4, the function of the static synchronous compensator device of the step 1 is: absorbable and generation reactive power,
It is a kind of parallel reactive power compensator.It is made of three major parts: DC side with capacitor voltage source against parallel operation, from
Coupling transformer and control system；
Static synchronous compensator controls modulation ratio m and phase angle δ according to busbar voltage fluctuation and generates trigger pulse, and dynamic is mended
System reactive power is repaid, control block diagram is as shown in figure 5, KDCPAnd KDCIFor DC voltage controller PI controlling unit parameter；KACPWith
KACIFor AC voltage controller PI controlling unit parameter；TC1 and TC2 is respectively direct current and AC voltage controller time constant.
Equation of the static synchronous compensator under dq coordinate system such as formula (6):
Wherein, w0For angular frequency；XsAnd RsFor the leakage reactance and bleeder resistance of auto-transformer；isdAnd isqRespectively dq is sat
Current component under mark system；RcIt is the bleeder resistance of shunt capacitor；udcReactive power for condenser voltage, compensator exports
The voltage at controller control point can be changed in the voltage range allowed.STATCOM device can control the triggering of inverter
Angle, to realize fast modulation reactive power.
Step 2: calculating system electrical damping characteristic under different electric network compositions and the method for operation；
The specific steps of electrical damping under the different electric network compositions of calculating and the method for operation of the step 2:
Step 2.1: will be once same when system operation is in stable state for a certain specific operational condition
Synchronizing frequency is that the oscillation of λ is applied on the rotor of blower, torque are as follows:
Δ T=Acos2 π λ t；
Step 2.2: when system operation is again at stable state, recording generator's power and angle δ, the electromagnetism of same period
Torque TeWith angular speed wλ；
Step 2.3: it is corresponding that λ being got to δ, T, w progress spectrum analysisElectrical bullet is calculated
Property torque coefficient and electrical damping torque coefficient:
Electrical damping torque coefficient are as follows:
Electrical elastic torque coefficient are as follows:
Because the damping value of mechanical damping is smaller, electrical damping coefficient can be only considered.When ignoring electrical elastic torque
When coefficient, stability criterion can be indicated are as follows: De(λ) > 0
For a certain frequency lambda, work as DeWhen (λ) is positive value, shafting is stablized；When for negative value, shafting is unstable, it may appear that oscillation
Divergent Phenomenon；When equal to zero, shafting is in neutrality.
Step 3: surveying the stator current of Wind turbines, and be filtered；
Step 4: optimizing application algorithm coordinates and optimizes static synchronous compensator control parameter and rotor-side additional longitudinal forces
The proportionality coefficient of device；
Step 4 parameter optimization the following steps are included:
(1) fitness function
In formula (7), in λ between 5-45hz value.
(2) optimization algorithm
As shown in figure 9, particle swarm optimization algorithm PSO is from RANDOM SOLUTION, by follow the optimal value that current search arrives come
Find global optimum.This algorithm has many advantages, such as to realize that easy, precision is high, convergence is fast.In order to which PSO is applied to STATCOM
With the Optimization about control parameter of fan rotor side additional damping controller, have defined below.
Neighborhood: assuming that in the target search space of D dimension, a group is formed by N number of particle, wherein i-th
Sublist is shown as the vector X of D dimensioni=(xi1,xi2,…,xiD), i=1,2 ..., N." flight " speed of i-th of particle is also
The vector of one D dimension, is denoted as Vi=(vi1,vi2..., viD), i=1,2 ... N
Individual extreme value: the optimal location that i-th of particle searches so far is denoted as:
pbest=(pi1,pi2,…,piD), i=1,2 ..., N.
Global extremum: the optimal location that entire population searches so far is denoted as:
gbest=(pg1,pg2,…,pgD)
Update mode: when finding the two optimal values, particle updates the speed of oneself according to following formula (8), (9)
Degree and position:
vid=w*vid+c1r1(pid-xid)+c2r2(pgd-xid) (8)
xid=xid+vid (9)
Wherein: c1And c2For Studying factors, also referred to as aceleration pulse, w is inertia weight, r1And r2For in [0,1] range with
Machine number.I=1,2 ..., D, vidIt is the speed of particle, vid∈[-vmax,vmax]。r1And r2It is the random number between [0,1].
(3) Optimizing Flow
1. initializing population, including population size N, the position x of each particleiWith speed Vi
2. calculating the fitness value F of each particleit[i]；
3. for each particle, if Fit[i] > pbest(i), then p is replaced with Fit [i]best(i)；If Fit[i] > gbest
(i), then F is usedit[i] substitutes gbest；
4. according to formula (8), the speed v of (9) more new particleiWith position xi；
5. exiting if meeting termination condition (error is good enough or reaches maximum number of iterations), step is otherwise gone to 2..
In one embodiment: the object of emulation is the wind power plant of a 9MW being made of the DFIG unit of 6 1.5MW, wind
Speed is 15m/s.The outlet busbar voltage of blower is 575V, and by 25kV/575V step-up transformer, (rated capacity is voltage
6 × 2MVA) it is raised to 25kV, the route through a 30km is connected to 25kV bus, and line parameter circuit value is as follows:
r1=r2=0.1153 Ω/km, r0=0.413 Ω/km
l1=l2=1.05 × 103H/km,l0=3.32 × 10-3H/km
C1=C2=11.33 × 10-9F/km,C0=5.01 × 10-9F/km
Voltage is boosted by step-up transformer to be connected with the bus of 120kV, is connected to voltage source by current-limiting reactor.Setting
Route series compensation degrees are 40%, in unchecked measure, system output power curve such as Figure 10.
As shown in figure 3, static synchronous compensator device is added in wind farm grid-connected system, and in double-fed fan rotor
Side increases additional longitudinal forces device, selects following control parameter as parameter to be optimized: fan rotor side additional longitudinal forces
ParameterStatic synchronous compensator DC voltage controller PI controlling unit parameter KDCPAnd KDCI；AC voltage controller PI
Controlling unit parameter KACPAnd KACI。
1. initialization
To each control parameterInitialization, i.e. x0=[0,1,1,1,1], Vi=
(vi1,vi2..., viD), and determined according to the value range of each parameter and search for bound, i.e. x_u=[100,50,50,50,50],
X_l=[0,0,0,0,0].
2. algorithm parameter is arranged
Search space dimension D=5, population size N=200, Studying factors c1=c2=2, inertia weight w=0.6, vmax=
10, the maximum number of iterations of particle swarm algorithm is set as 1000.
3. carrying out parameter coordination optimization using particle swarm optimization algorithm
The step of according to particle swarm optimization algorithm process, is iterated search to parameter to be optimized, and final output is global
Optimal value xbest=[2.4,2.1,1.1,0.3,33.8].When control parameter is initial value, train power output curve is as schemed
Shown in 11, in control parameter after coordination optimization, power curve such as Figure 12, it can be seen that system inhibits sub-synchronous oscillation
Ability gets a promotion.
Finally it is noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, the essence for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
Mind and range.
Claims (8)
1. a kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control, which is characterized in that described time same
Walk oscillation suppression method the following steps are included:
Step 1: establishing double-fed fan motor field grid-connected system Perturbation Analysis model；
Step 2: calculating system electrical damping characteristic under different electric network compositions and the method for operation；
Step 3: surveying the stator current of Wind turbines, and be filtered；
Step 4: optimizing application algorithm coordinates and optimizes static synchronous compensator control parameter and fan rotor side additional longitudinal forces
The proportionality coefficient of device.
2. a kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control according to claim 1,
It is characterized by: the System Small Disturbance analysis model of the step 1 includes: double-fed blower model, wind energy conversion system shafting model, transformation
Device control system model, static synchronous compensator model and model of power transmission system.
3. a kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control according to claim 2,
It is characterized by: the double-fed blower model of the step 1 is established by following steps: the stator in dual-feed asynchronous wind power generator
Motor convention has all been selected with rotor, positive direction is electric current inflow direction, and direction of rotation is consistent with the positive direction of electromagnetic torque,
By in the stator and rotor of dual-feed asynchronous wind power generator Current Voltage and magnetic flux variable from ABC coordinate transform to dq0 coordinate
System, obtains dependent equation such as formula (1)-(4) of the voltage of stator and rotor, magnetic linkage and torque in dq0 coordinate:
Wherein us,ur,is,irRespectively stator voltage, rotor voltage, stator current and rotor current, ψs,ψrRespectively stator and
The magnetic linkage of rotor, subscript d, q respectively indicate the d axis component and q axis component of corresponding physical quantity, and p indicates differential operator, LsIndicate fixed
Sub- winding self-induction, LrFor rotor windings self-induction, RsFor stator winding resistance, RrIndicate rotor windings resistance, LmFor rotor and stator
Mutual inductance between winding, ω, ω2Respectively power network current angular frequency and rotor current angular frequency.
4. a kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control according to claim 2,
It is characterized by: the wind energy conversion system shafting model of the step 1 is established by following steps: indicating wind using double mass shafting models
Gear-box and wind energy conversion system are equivalent to a mass block by power arbor machine driven system, another mass is equivalent by generator,
Formula (5) is the expression formula of the differential equation group of wind energy conversion system shafting model:
Wherein, HgAnd HtIndicate the inertia time constant of generator and blower；wrIndicate generator speed, w1For turning for wind energy conversion system
Speed；TwIndicate the mechanical output torque of wind energy conversion system；TeFor the electromagnetic torque of generator；
Dg、Dt、DtgThe respectively damped coefficient of shafting, generator and wind energy conversion system；KtgIndicate axis rigidity coefficient, unit is
pu/rad。
5. a kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control according to claim 2,
It is characterized by: the converter control system model of the step 1 is established by following steps: rotor-side converter is to idle electricity
Pressure is controlled, and controller is made of current control inner ring and power control outer loop, in the feelings for taking stator voltage q axis to orient
Under condition, the active power of dual-feed asynchronous wind power generator can be controlled by rotor current q axis component, and reactive power can pass through rotor
The d axis component of electric current controls, and the current control inner ring of rotor-side converter realizes the decoupling control of watt current and exciting current
System, power outer ring provide reference current for current inner loop；
Grid side converter controls the active power flowed through, and maintains the stabilization of dc-link capacitance voltage, in order to become net side
Parallel operation fortune is run with unity power factor, sets zero for the definite value of reactive power, double-fed blower total power factor passes through control
Rotor-side converter reactive power given value realizes that controller controls outer ring by voltage and current control inner ring is constituted.
6. a kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control according to claim 2,
It is characterized by: the static synchronous compensator model of the step 1 is made of three major parts: DC side is with capacitor
Voltage source is against parallel operation, auto-transformer and control system；
Static synchronous compensator controls modulation ratio m and phase angle δ according to busbar voltage fluctuation and generates trigger pulse, dynamic compensation system
System reactive power, equation of the static synchronous compensator under dq coordinate system such as formula (6):
Wherein, w0For angular frequency；XsAnd RsFor the leakage reactance and bleeder resistance of auto-transformer；isdAnd isqRespectively dq coordinate system
Under current component；RcIt is the bleeder resistance of shunt capacitor；udcFor condenser voltage.
7. a kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control according to claim 1,
It is characterized by: the specific steps for calculating electrical damping under different electric network compositions and the method for operation of the step 2:
Step 2.1: apply the microvariations torque of a synchronizing frequency λ on the rotor of double-fed blower:
Δ T=Acos2 π λ t；
Step 2.2: when system operation is again at stable state, recording generator's power and angle δ, the electromagnetic torque of same period
TeWith angular speed wλ；
Step 2.3: to δ, Te, w carries out spectrum analysis to get λ correspondingElectrical elasticity is calculated to turn
Moment coefficient and electrical damping torque coefficient.
8. a kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control according to claim 1,
It is characterized by: the static synchronous compensator control parameter and fan rotor side additional damping controller parameter of the step 4 are assisted
Tuning specific steps:
Optimization algorithm fitness function are as follows:
Wherein, λ value between 5-45hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811502666.1A CN109473997A (en) | 2018-12-10 | 2018-12-10 | A kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811502666.1A CN109473997A (en) | 2018-12-10 | 2018-12-10 | A kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109473997A true CN109473997A (en) | 2019-03-15 |
Family
ID=65675094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811502666.1A Pending CN109473997A (en) | 2018-12-10 | 2018-12-10 | A kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109473997A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098624A (en) * | 2019-05-17 | 2019-08-06 | 华中科技大学 | A kind of double-fed blower additional control method and system of optimization system frequency dynamic |
| CN110417047A (en) * | 2019-06-28 | 2019-11-05 | 武汉大学 | Method based on multiple torque coefficient analysis double-fed blower SSCI damping characteristic |
| CN110556842A (en) * | 2019-09-16 | 2019-12-10 | 湖南大学 | Control method of direct-drive wind power plant inductive weak grid-connected subsynchronous oscillation suppression device |
| CN110739704A (en) * | 2019-10-28 | 2020-01-31 | 贵州电网有限责任公司 | control method for restraining low-frequency oscillation operation risk of power distribution network |
| CN111224411A (en) * | 2020-04-24 | 2020-06-02 | 中国电力科学研究院有限公司 | Inertial parameter determination method and device of inertia compensation equipment in power 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 |
| CN111416366A (en) * | 2020-04-30 | 2020-07-14 | 上海恒能泰企业管理有限公司璞能电力科技工程分公司 | Doubly-fed wind power plant sub-synchronous oscillation suppression method through series compensation considering load model |
| CN111817314A (en) * | 2020-07-16 | 2020-10-23 | 阳光电源股份有限公司 | Subsynchronous oscillation suppression method and related device for doubly-fed unit grid-connected system |
| CN112103939A (en) * | 2019-06-18 | 2020-12-18 | 上海电机学院 | Method and device for analyzing stability of power system |
| CN112202186A (en) * | 2020-08-31 | 2021-01-08 | 华北电力大学 | Machine network coordination feedback control method for restraining subsynchronous oscillation of direct-drive fan |
| CN112736917A (en) * | 2020-12-30 | 2021-04-30 | 郑州轻工业大学 | Wind-solar-fire bundling and delivery system STATCOM-POD coordinated optimization design method |
| CN113270873A (en) * | 2021-05-19 | 2021-08-17 | 国网内蒙古东部电力有限公司 | Oscillation suppression device for direct-drive wind power plant through LCC-HVDC (low-voltage direct current-high voltage direct current) sending system |
| CN117650529A (en) * | 2024-01-30 | 2024-03-05 | 武汉理工大学 | Method and device for suppressing subsynchronous oscillation of grid-structured converter based on voltage compensation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631337A (en) * | 2018-05-23 | 2018-10-09 | 哈尔滨工业大学 | The double-fed fan motor unit subsynchronous resonance suppressing method of damping control is cooperateed with based on converter |
-
2018
- 2018-12-10 CN CN201811502666.1A patent/CN109473997A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631337A (en) * | 2018-05-23 | 2018-10-09 | 哈尔滨工业大学 | The double-fed fan motor unit subsynchronous resonance suppressing method of damping control is cooperateed with based on converter |
Non-Patent Citations (2)
| Title |
|---|
| 单馨: "DFIG风电场次同步振荡的分析与研究", 《中国优秀硕士学位论文全文数据库》 * |
| 吕潇: "计及双馈风电机组的电力***次同步振荡抑制策略研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098624A (en) * | 2019-05-17 | 2019-08-06 | 华中科技大学 | A kind of double-fed blower additional control method and system of optimization system frequency dynamic |
| CN110098624B (en) * | 2019-05-17 | 2020-10-16 | 华中科技大学 | Doubly-fed wind turbine additional control method and system for optimizing system frequency dynamic |
| CN112103939A (en) * | 2019-06-18 | 2020-12-18 | 上海电机学院 | Method and device for analyzing stability of power system |
| CN112103939B (en) * | 2019-06-18 | 2024-01-26 | 上海电机学院 | Power system stability analysis method and device |
| CN110417047A (en) * | 2019-06-28 | 2019-11-05 | 武汉大学 | Method based on multiple torque coefficient analysis double-fed blower SSCI damping characteristic |
| CN110556842A (en) * | 2019-09-16 | 2019-12-10 | 湖南大学 | Control method of direct-drive wind power plant inductive weak grid-connected subsynchronous oscillation suppression device |
| CN110739704A (en) * | 2019-10-28 | 2020-01-31 | 贵州电网有限责任公司 | control method for restraining low-frequency oscillation operation risk of power distribution network |
| 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 |
| 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 |
| CN111224411A (en) * | 2020-04-24 | 2020-06-02 | 中国电力科学研究院有限公司 | Inertial parameter determination method and device of inertia compensation equipment in power system |
| CN111224411B (en) * | 2020-04-24 | 2020-08-11 | 中国电力科学研究院有限公司 | Inertial parameter determination method and device of inertia compensation equipment in power system |
| CN111416366A (en) * | 2020-04-30 | 2020-07-14 | 上海恒能泰企业管理有限公司璞能电力科技工程分公司 | Doubly-fed wind power plant sub-synchronous oscillation suppression method through series compensation considering load model |
| CN111817314A (en) * | 2020-07-16 | 2020-10-23 | 阳光电源股份有限公司 | Subsynchronous oscillation suppression method and related device for doubly-fed unit grid-connected system |
| CN111817314B (en) * | 2020-07-16 | 2022-05-24 | 阳光电源股份有限公司 | Subsynchronous oscillation suppression method and related device for doubly-fed unit grid-connected system |
| CN112202186A (en) * | 2020-08-31 | 2021-01-08 | 华北电力大学 | Machine network coordination feedback control method for restraining subsynchronous oscillation of direct-drive fan |
| CN112736917A (en) * | 2020-12-30 | 2021-04-30 | 郑州轻工业大学 | Wind-solar-fire bundling and delivery system STATCOM-POD coordinated optimization design method |
| CN112736917B (en) * | 2020-12-30 | 2023-01-24 | 郑州轻工业大学 | STATCOM-POD coordinated optimization design method for wind, light and fire bundled delivery system |
| CN113270873A (en) * | 2021-05-19 | 2021-08-17 | 国网内蒙古东部电力有限公司 | Oscillation suppression device for direct-drive wind power plant through LCC-HVDC (low-voltage direct current-high voltage direct current) sending system |
| CN117650529A (en) * | 2024-01-30 | 2024-03-05 | 武汉理工大学 | Method and device for suppressing subsynchronous oscillation of grid-structured converter based on voltage compensation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109473997A (en) | A kind of double-fed fan motor field sub-synchronous oscillation suppression method based on source net Collaborative Control | |
| CN109120001B (en) | Doubly-fed wind power plant grid-connected system subsynchronous oscillation suppression method based on virtual resistor | |
| CN107863783B (en) | Doubly-fed wind turbine virtual synchronous control method | |
| CN102074967B (en) | Method for controlling energy storage type wind power station with synchronization property | |
| CN109066770B (en) | Control method and device for accessing wind power to flexible direct current power transmission system | |
| CN108270241A (en) | The control method of wind turbine gird-connected inverter virtual synchronous generator | |
| CN110649643A (en) | Wind field multi-end flexible-direct control method and system capable of actively supporting power grid frequency | |
| CN105244911A (en) | High permeability new energy power grid connection system and stability control method | |
| CN106059422B (en) | A kind of fuzzy control method inhibited for double-fed fan motor play synchronized oscillation | |
| Siraj et al. | Modeling and control of a doubly fed induction generator for grid integrated wind turbine | |
| CN106786673B (en) | The suppressing method and device of double-fed blower compensated transmission system subsynchronous resonance | |
| CN110048457A (en) | A kind of double-fed blower virtual synchronous control method having low voltage ride-through function | |
| CN106786674B (en) | Double-fed blower-compensated transmission system subsynchronous resonance suppressing method and device | |
| CN102684209A (en) | Method for improving sub-synchronous oscillation (SSO) damping of thermal power plant by utilizing fan supplementary controller | |
| CN112448398A (en) | Stator side analog resistance-based doubly-fed wind power plant subsynchronous oscillation suppression method | |
| CN110518600A (en) | A kind of grid-connected active support and control structure of PMSG of the modified multi-machine parallel connection based on VSG | |
| Mensou et al. | Backstepping controller for a variable wind speed energy conversion system based on a DFIG | |
| Ouassaid et al. | Sliding mode control of induction generator wind turbine connected to the grid | |
| CN107370183B (en) | The subsynchronous stable region control method and controller of double-fed air-blower control parameter | |
| Zhu et al. | High-frequency resonance of DFIG-based wind generation under weak power network | |
| Yen et al. | Study on VSC-HVDC grid topology of offshore wind farms | |
| CN103259269A (en) | Wind power plant reactive power optimization configuration method based on double-fed induction fan reactive power generating capacity | |
| Singh et al. | Performance Evaluation of a Grid Connected Variable Speed 3-Φ Doubly Fed Induction Generator in Wind Energy Conversion System Using Battery Energy Storage System | |
| Riouch et al. | A coordinated control for smoothing output power of a DFIG based wind turbine | |
| Abozekry et al. | Performance enhancement of a DFIG wind energy conversion system using phase advanced network |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190315 |
|
| RJ01 | Rejection of invention patent application after publication |