CN105914794B - An a kind of wind-powered electricity generation group of planes based on STATCOM/BESS coordinates booting-self controller method - Google Patents
An a kind of wind-powered electricity generation group of planes based on STATCOM/BESS coordinates booting-self controller method Download PDFInfo
- Publication number
- CN105914794B CN105914794B CN201610327744.3A CN201610327744A CN105914794B CN 105914794 B CN105914794 B CN 105914794B CN 201610327744 A CN201610327744 A CN 201610327744A CN 105914794 B CN105914794 B CN 105914794B
- Authority
- CN
- China
- Prior art keywords
- controller
- voltage
- self
- frequency
- dfig
- 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.)
- Active
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
- H02J3/38—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
-
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- 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
-
- 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
The invention discloses an a kind of wind-powered electricity generation group of planes based on STATCOM/BESS to coordinate booting-self controller method, comprises the following steps：S1：When DFIG self-startings under the conditions of off-network start, model feature during for DFIG self-startings, designs the booting-self controller device based on feedback linearization control algolithm；S2：After booting-self controller device detects the voltage and frequency stabilization of wind turbine islet operation, STATCOM/BESS is incorporated to；S3：After DFIG and the STATCOM startup of energy-storage system, it is incorporated to the DFIG for being not equipped with energy-storage system, coordinate fuzzy controller to start, the controller utilizes fuzzy PID algorithm, continue to monitor the DFIG voltages being newly incorporated to and frequency stabilization situation, by fuzzy reasoning, the PID controller parameter of DFIGs of the STATCOM with being equipped with energy-storage system is continued to optimize, coordinates control wind turbine and the active reactive output of STATCOM.The present invention allows a double-fed asynchronous wind-powered electricity generation group of planes to realize self-starting under the conditions of off-network, and then realizes stable islet operation.
Description
Technical field
The present invention relates to a wind-powered electricity generation group of planes to run control field, more particularly to a kind of wind turbine based on STATCOM/BESS
Group coordinates booting-self controller method.
Background technology
In recent years, since wind-powered electricity generation has the features such as intermittent, randomness and fluctuation, large-scale wind power is grid-connected still to be deposited
In no small challenge.Distributed wind-power generator can recover island with power when grid power blackout occurs, it has also become centrally connected power supply side
The indispensable important supplement of formula.In order to preferably realize wind-powered electricity generation group of planes distributed power generation it may first have to study a wind-powered electricity generation group of planes and exist
Possesses the ability of self-starting under islet operation.
Nowadays, double-fed asynchronous Wind turbines (Doubly-Fed Induction Generator, DFIG) become wind-powered electricity generation
The mainstream model that field is selected, since the wind turbine is by the way of rotor flexible connection, does not possess self-startup ability.DFIG's
Current transformer DC capacitor side installs energy storage device additional, provides DC voltage by energy storage device, and then realize the self-starting of Wind turbines
Process.In the start-up course of a wind-powered electricity generation group of planes, the extensive energy-storage system cost investment that is equipped with is larger, can not meet the warp of power grid
Ji property requires, this just needs a small number of Wind turbines for being equipped with energy-storage system to take the lead in realizing self-starting, and then in the association of FACTS equipment
Help the remaining Wind turbines of lower startup.
Traditional STATCOM is made of DC bus capacitor and voltage source inverter, to ensure the amplitude of output voltage, during stable state
Need to absorb certain active power compensation own loss from power grid to maintain direct current to survey voltage, so not possessing active adjusting energy
Power, it is impossible to inject active power to power grid.
The content of the invention
Goal of the invention：The object of the present invention is to provide a kind of wind turbine based on STATCOM/BESS that can realize self-starting
Group coordinates booting-self controller method.
Technical solution：A wind-powered electricity generation group of planes of the present invention based on STATCOM/BESS coordinates booting-self controller method, bag
Include following steps：
S1：When DFIG self-startings under the conditions of off-network start, model feature during for DFIG self-startings, designs base
In the booting-self controller device of feedback linearization control algolithm；
S2：After booting-self controller device detects the voltage and frequency stabilization of wind turbine islet operation, STATCOM/BESS is incorporated to；
S3：After DFIG and the STATCOM startup of energy-storage system, the DFIG for being not equipped with energy-storage system is incorporated to,
Coordinate fuzzy controller to start, fuzzy controller utilizes fuzzy PID algorithm, continue to monitor newly be incorporated to be not equipped with storing up
The DFIG voltages and frequency stabilization situation of energy system, by fuzzy reasoning, continue to optimize STATCOM and equipped with energy-storage system
DFIG PID controller parameter, coordinate control equipped with energy-storage system DFIG and STATCOM active reactive export.
Further, the self-starting process in the step S1 is divided into self-exciting starting, run with load and frequency three ranks of adjustment
Section, the control strategy that the self-exciting starting stage uses rotor-side converter and net side current transformer for：By the control of net side current transformer
Signal block, while the grid-connected switch brk_grid of net side current transformer is disconnected, the switch brk_bat of energy-storage system is closed,
Energy-storage system is charged for DC level, detect DC capacitor voltage, if DC capacitor voltage reaches capacitance voltage rated value,
Start DFIG.
Further, the self-starting process in the step S1 is divided into self-exciting starting, run with load and frequency three ranks of adjustment
Section, the control strategy that the run with load stage uses rotor-side converter and net side current transformer for：Set end voltage is detected, if generator terminal
Voltage is more than set end voltage rated value, then closes the grid-connected switch brk_grid of net side current transformer, while unlocks net side current transformer
SVPWM control signals, net side current transformer starts to work, and ensures that DC capacitor voltage is stable and provides nothing for voltage on line side
Work(supports；DC capacitor voltage deviation is detected, if DC capacitor voltage deviation is less than εdc_max, then assert that DC voltage is permanent
It is fixed, and switch brk_bat is disconnected, energy-storage system exits work.
Further, the self-starting process in the step S1 is divided into self-exciting starting, run with load and frequency three ranks of adjustment
Section, frequency adjusting stage are adjusted by active output of the frequency controller to wind turbine, and the structure of frequency controller is：Frequency
Controller includes rotational speed governor and additional frequency controller, and wherein rotational speed governor is by rotor speed ωrInput to ωr- P is bent
Active power reference value is produced in lineωr- P curves function is determined by the power rotary speed property of Wind turbines；Additional frequency control
Shown in the design of device processed such as formula (1)：
In formula (1), fs、frefThe respectively output frequency of Wind turbines and output frequency reference value, kfp1And kfp2To be attached
Add the proportionality coefficient of frequency controller, kfi1And kfi2For the integral coefficient of additional frequency controller；
Finally, the active power reference value that wind turbine self-starting frequency controller provides rotor-side converter is P*：
In formula (2),For the active power reference value given by rotational speed governor.
Further, the design procedure of the feedback linearization control algolithm in the step S1 is as follows：
S1.1：The linearisation difference model of the rotor-side converter of DFIG is established, as shown in formula (3)：
In formula (3),For rotor d shaft currents,For rotor q shaft currents, LmIt is coaxial etc. for stator and rotor in dq axis coordinate systems
Imitate the mutual inductance between winding, Rr、LrFor two phase winding resistance of rotor equivalent and self-induction in dq axis coordinate systems,For generator
Magnetic leakage factor, ωslip=ω1-ωrFor revolutional slip, ω1For stator field rotating speed, ωrFor rotor field rotating speed, ψsqFor stator d
Axis magnetic linkage, ψsdFor stator q axis magnetic linkages, urdFor rotor d shaft voltages, urqFor rotor q shaft voltages, urd1And urq1Encouraged for meter and stator
The compensation term of magnetoelectricity stream, as shown in formula (4)：
In formula (4), RsFor equivalent two phase winding resistance of stator in dq axis coordinate systems, isdFor stator d shaft currents, isqFor stator
Q shaft currents, UsFor fan outlet side voltage magnitude；
Make y1=h1(x)=x1=irdAnd y2=h2(x)=x2=irq, can obtain：
In formula (5), Ar(x)=f (x), Er(x)=g (x)；
S1.2：Rotor voltage controller is designed according to formula (5), as shown in formula (6)：
In formula (6), vrdAnd vrqFor the tracking control signal of rotor voltage, provided by rotor current controller, such as formula (7)
It is shown：
In formula (7), e1=y1-y1refFor rotor current y1With rotor current reference value y1refDifference, e2=y2-y2refTo turn
Electron current y2With rotor current reference value y2refDifference, krd_p、krd_iFor rotor current controller d axis scales, integral parameter,
krq_p、krq_iFor rotor current controller d axis scales, integral parameter；
S1.3：The reference voltage of rotor-side converter is tried to achieve according to formula (8)With
Further, in the step S3, coordinate fuzzy controller and continue to monitor voltage deviation amount and frequency departure amount,
By fuzzy reasoning, the current transformer pid parameter k of STATCOM and DFIG is continued to optimizep、ki、kdThe step of as follows, wherein kpFor than
Example coefficient, kiFor differential coefficient, kdFor integral coefficient：
S3.1：When the absolute value of voltage deviation amount | εu| more than voltage coordination thresholding εucoOr frequency departure amount
Absolute value | εf| more than frequency coordination action thresholding εfcoWhen, STATCOM and DFIG is acted at the same time, using voltage, FREQUENCY CONTROL
Pattern；Increase kp, reduce kd, reduce ki；
S3.2：When the absolute value of voltage deviation amount | εu| between voltage coordination thresholding εucoDoor is acted with voltage DFIG
Limit εuDFIGBetween, or the absolute value of frequency departure amount | εf| between frequency coordination action thresholding εfcoDoor is acted with frequency DFIG
Limit εfDFIGBetween when, reduce kp, increase ki；STATCOM is using voltage, FREQUENCY CONTROL pattern；
S3.3：When the absolute value of voltage deviation amount | εu| less than voltage DFIG action thresholdings εuDFIGOr frequency departure amount
Absolute value | εf| less than frequency DFIG action thresholdings εfDFIGWhen, DFIG uses power control strategy, ensures the power stability of system
Output and power factor (PF), fuzzy controller are failure to actuate；Increase kpAnd ki, and according to the absolute value of voltage deviation amount | εu| or
The absolute value of frequency departure amount | εf| come to kdCarry out value；
S3.4：According to the different conditions of system operation, while consider kp、ki、kdBetween association, select input language become
Measure as εu、εf、ΔεuWith Δ εf, linguistic variable value takes seven fuzzy values of NB, NM, NS, Z, PS, PM, PB；Output language is selected to become
Measure as Δ kp、Δki、Δkd, its linguistic variable value also takes NB, NM, NS, Z, PS, PM, PB, according to the fuzzy rule of engineering experience design
Then, the fuzzy reasoning table finally set up；
S3.5：The fuzzy parameter adjustment formula of STATCOM is：
In formula (9), kp(n) it is the proportionality coefficient of n-th sampling instant, ki(n) it is the differential coefficient of n-th sampling instant,
kd(n) it is the integral coefficient of n-th sampling instant, Δ kp(n) it is proportionality coefficient of the n-th sampling instant after fuzzy reasoning,
Δki(n) it is differential coefficient of the n-th sampling instant after fuzzy reasoning, Δ kd(n) pass through for n-th sampling instant fuzzy
Integral coefficient after reasoning；
kp(n)、ki(n) and kd(n) with the absolute value of voltage deviation amount | εu| and the absolute value of frequency departure amount | εf| become
Change, i.e.,：
In formula (10), μ=k, i, p.
Beneficial effect：Compared with prior art, the present invention has following beneficial effect：
(1) by the booting-self controller strategy based on feedback linearization controller, controlled compared to traditional PI, can be more
Start Wind turbines fast and stable and realize islet operation；
(2) control strategy is started by the coordination based on fuzzy controller, rushing for system is being incorporated in face of new wind turbine
When hitting, it can accomplish quick response, while the power output of effective coordination DFIG and STATCOM, finally realize a wind-powered electricity generation group of planes
Self-starting and stable operation.
Brief description of the drawings
Fig. 1 is flow chart of the method for the present invention；
Fig. 2 is the feedback linearization controller block diagram of the present invention；
Fig. 3 is double-fed asynchronous Wind turbines and STATCOM/BESS system global structure figures；
Fig. 4 is double-fed asynchronous Wind turbines rotor-side converter booting-self controller strategy block diagram；
Fig. 5 is double-fed asynchronous Wind turbines net side current transformer booting-self controller strategy block diagram；
Fig. 6 is double-fed asynchronous Wind turbines frequency controller control block diagram；
Fig. 7 is STATCOM/BESS current transformer control strategy block diagrams；
Fig. 8 starts fuzzy-adaptation PID control block diagram for coordination.
Embodiment
Technical scheme is further introduced with reference to the accompanying drawings and detailed description.
The invention discloses an a kind of wind-powered electricity generation group of planes based on STATCOM/BESS to coordinate booting-self controller method, such as Fig. 1 institutes
Show, comprise the following steps：
S1：When DFIG self-startings under the conditions of off-network start, model feature during for DFIG self-startings, designs base
In the booting-self controller device of feedback linearization control strategy, as shown in Figure 2；
Self-starting process is divided into self-exciting starting, run with load and frequency adjustment three phases, and the self-exciting starting stage is to rotor
The control strategy that side converter and net side current transformer use for：By the control signal locking of net side current transformer, while net side is become
The grid-connected switch brk_grid for flowing device is disconnected, and the switch brk_bat of energy-storage system is closed, energy-storage system is filled for DC level
Electricity, detects DC capacitor voltage, if DC capacitor voltage reaches capacitance voltage rated value, starts DFIG.Such as Fig. 4 and Fig. 5 institutes
Show, the control strategy that the run with load stage uses rotor-side converter and net side current transformer for：Set end voltage is detected, if generator terminal
Voltage is more than set end voltage rated value, then closes the grid-connected switch brk_grid of net side current transformer, while unlocks net side current transformer
SVPWM control signals, net side current transformer starts to work, and ensures that DC capacitor voltage is stable and provides nothing for voltage on line side
Work(supports；DC capacitor voltage deviation is detected, if DC capacitor voltage deviation is less than εdc_max, then assert that DC voltage is permanent
It is fixed, and switch brk_bat is disconnected, energy-storage system exits work.The frequency adjusting stage is by frequency controller to the active of wind turbine
Output is adjusted, as shown in fig. 6, the structure of frequency controller is：Frequency controller includes rotational speed governor and additional frequency
Controller, wherein rotational speed governor are by rotor speed ωrInput to ωrActive power reference value is produced in-P curvesωr- P is bent
Line function is determined by the power rotary speed property of Wind turbines；Shown in the design of additional frequency controller such as formula (1)：
In formula (1), fs、frefThe respectively output frequency of Wind turbines and output frequency reference value, kfp1And kfp2To be attached
Add the proportionality coefficient of frequency controller, kfi1And kfi2For the integral coefficient of additional frequency controller；
Finally, the active power reference value that wind turbine self-starting frequency controller provides rotor-side converter is P*：
In formula (2),For the active power reference value given by rotational speed governor.
The design procedure of feedback linearization controller in step S1 is as follows：
S1.1：The linearisation difference model of the rotor-side converter of DFIG is established, as shown in formula (3)：
In formula (3),For rotor d shaft currents,For rotor q shaft currents, LmIt is coaxial etc. for stator and rotor in dq axis coordinate systems
Imitate the mutual inductance between winding, Rr、LrFor two phase winding resistance of rotor equivalent and self-induction in dq axis coordinate systems,For generator
Magnetic leakage factor, ωslip=ω1-ωrFor revolutional slip, ω1For stator field rotating speed, ωrFor rotor field rotating speed, ψsqFor stator d
Axis magnetic linkage, ψsdFor stator q axis magnetic linkages, urdFor rotor d shaft voltages, urqFor rotor q shaft voltages, urd1And urq1Encouraged for meter and stator
The compensation term of magnetoelectricity stream, as shown in formula (4)：
In formula (4), RsFor equivalent two phase winding resistance of stator in dq axis coordinate systems, isdFor stator d shaft currents, isqFor stator
Q shaft currents, UsFor fan outlet side voltage magnitude；
Make y1=h1(x)=x1=irdAnd y2=h2(x)=x2=irq, can obtain：
In formula (5), Ar(x)=f (x), Er(x)=g (x)；
S1.2：Rotor voltage controller is designed according to formula (5), as shown in formula (6)：
In formula (6), vrdAnd vrqFor the tracking control signal of rotor voltage, provided by rotor current controller, such as formula (7)
It is shown：
In formula (7), e1=y1-y1refFor rotor current y1With rotor current reference value y1refDifference, e2=y2-y2refTo turn
Electron current y2With rotor current reference value y2refDifference, krd_p、krd_iFor rotor current controller d axis scales, integral parameter,
krq_p、krq_iFor rotor current controller d axis scales, integral parameter；
S1.3：The reference voltage of rotor-side converter is tried to achieve according to formula (8)With
S2：After booting-self controller device detects the voltage and frequency stabilization of wind turbine islet operation, STATCOM/BESS is incorporated to；
S3：After DFIG and the STATCOM startup of energy-storage system, the DFIG for being not equipped with energy-storage system is incorporated to,
Coordinate fuzzy controller to start, fuzzy controller utilizes fuzzy PID algorithm, continue to monitor newly be incorporated to be not equipped with storing up
The DFIG voltages and frequency stabilization situation of energy system, by fuzzy reasoning, continue to optimize STATCOM and equipped with energy-storage system
DFIG PID controller parameter, coordinate control equipped with energy-storage system DFIG and STATCOM active reactive export.
STATCOM/BESS current transformers control strategy is as shown in fig. 7, coordination startup fuzzy-adaptation PID control block diagram is as shown in Figure 8.Coordinate control
Device continues to monitor voltage deviation amount and frequency departure amount, by fuzzy reasoning, continues to optimize the current transformer of STATCOM and DFIG
Pid parameter kp、ki、kdThe step of as follows, wherein kpFor proportionality coefficient, kiFor differential coefficient, kdFor integral coefficient：
S3.1：When the absolute value of voltage deviation amount | εu| more than voltage coordination thresholding εucoOr frequency departure amount
Absolute value | εf| more than frequency coordination action thresholding εfcoWhen, STATCOM and DFIG is acted at the same time, using voltage, FREQUENCY CONTROL
Pattern；Increase kp, reduce kd, reduce ki；
S3.2：When the absolute value of voltage deviation amount | εu| between voltage coordination thresholding εucoDoor is acted with voltage DFIG
Limit εuDFIGBetween, or the absolute value of frequency departure amount | εf| between frequency coordination action thresholding εfcoDoor is acted with frequency DFIG
Limit εfDFIGBetween when, reduce kp, increase ki；STATCOM is using voltage, FREQUENCY CONTROL pattern；
S3.3：When the absolute value of voltage deviation amount | εu| less than voltage DFIG action thresholdings εuDFIGOr frequency departure amount
Absolute value | εf| less than frequency DFIG action thresholdings εfDFIGWhen, DFIG uses power control strategy, ensures the power stability of system
Output and power factor (PF), fuzzy controller are failure to actuate；Increase kpAnd ki, and according to the absolute value of voltage deviation amount | εu| or
The absolute value of frequency departure amount | εf| come to kdCarry out value；
S3.4：According to the different conditions of system operation, while consider kp、ki、kdBetween association, select input language become
Measure as εu、εf、ΔεuWith Δ εf, linguistic variable value takes seven fuzzy values of NB, NM, NS, Z, PS, PM, PB；Output language is selected to become
Measure as Δ kp、Δki、Δkd, its linguistic variable value also takes NB, NM, NS, Z, PS, PM, PB, according to the fuzzy rule of engineering experience design
Then, the fuzzy reasoning table finally set up, as shown in table 1；
1 Δ k of tablep、Δki、ΔkdFuzzy control rule table
S3.5：The fuzzy parameter adjustment formula of STATCOM is：
In formula (9), kp(n) it is the proportionality coefficient of n-th sampling instant, ki(n) it is the differential coefficient of n-th sampling instant,
kd(n) it is the integral coefficient of n-th sampling instant, Δ kp(n) it is proportionality coefficient of the n-th sampling instant after fuzzy reasoning,
Δki(n) it is differential coefficient of the n-th sampling instant after fuzzy reasoning, Δ kd(n) pass through for n-th sampling instant fuzzy
Integral coefficient after reasoning；
kp(n)、ki(n) and kd(n) with the absolute value of voltage deviation amount | εu| and the absolute value of frequency departure amount | εf| become
Change, i.e.,：
In formula (10), μ=k, i, p.
A kind of embodiment of the present invention is described below.As shown in figure 3, the double-fed asynchronous wind equipped with energy-storage system
Motor group (DFIG) realizes self-starting and load carrying in the case where net side does not have voltage support, then switchs T1 closures,
STATCOM/BESS is incorporated to, participates in the power quality of regulating system, after system tends towards stability operation, switch T2 closures, and
Enter new DFIG.Wherein, the outlet side rated voltage of DFIG is 575V, and the rated capacity of separate unit wind turbine is 1.5MVA, specified frequency
Rate is 50Hz.Wind-powered electricity generation group of planes total capacity equipped with energy-storage system is 4.5MVA, and the capacity of STATCOM is 3MVA.System band sense
Property load rated power be 0.6MW, generator terminal offer reactive power support capacitance rated reactive power be 1Mvar.Double-fed asynchronous wind
Motor group rotor resistance is Rr=0.016pu, rotor reactance Lr=0.16pu；Stator resistance is Rs=0.023pu, stator reactance
For Ls=0.18pu；Excitation reactance is Lm=2.9pu；Inertia coeffeicent is H=0.09526；Net side current transformer into line resistance be Rg=
0.003pu, inlet wire reactance are Lg=0.00091pu.The inlet wire reactance of STATCOM is Ls=0.00008H.In self-starting process
In, it is believed that wind speed is constant and wind speed is v=12m/s.The present embodiment by three steps realize a double-fed asynchronous wind-powered electricity generation group of planes with
The coordination self-starting of STATCOM/BESS.
(1) when the double-fed asynchronous Wind turbines self-starting under the conditions of off-network starts, controller disconnects net side load, to
DC capacitor both ends are incorporated to energy-storage system, charge to it and keep the stabilization of self-starting capacitance voltage early period；At the same time controller to
Rotor-side converter and stator side converter send inversion instruction, using voltage control strategy, ensure fan outlet side voltage
Constant and DC capacitor voltage is constant.Set voltage reference value U*=1.0pu, frequency reference fref=50Hz, direct current
Flat departure maximum εdc_max=1%, after voltage on line side reaches the control range of rated voltage, access system load, together
When initiation culture controller, further Wind turbines self-starting frequency is controlled, ensure system frequency stabilization in specified frequency
Within rate.
(2) after controller detects system frequency voltage stabilization, STATCOM/BESS is incorporated to, BESS is voltage-controlled using direct current
Molding formula, charges to the DC level of STATCOM and keeps its voltage stabilization.STATCOM uses voltage, FREQUENCY CONTROL pattern,
Set voltage reference value Vref=1.0pu, frequency reference fref=50Hz, is further ensured that the power quality of system.
(3) after starting equipped with the DFIG and STATCOM of energy-storage system, system coordination controller starts, at this time simultaneously
Enter to be not equipped with the DFIG of energy-storage system, controller continues to monitor the voltage and frequency stabilization situation of system, using fuzzy
Controller, the active reactive for coordinating control wind turbine and STATCOM for the different characteristics of wind turbine and STATCOM export, final real
Stablizing for an existing wind-powered electricity generation group of planes starts and runs.
Among these, for voltage, the departure of frequency, the corresponding voltage deviation amount of fuzzy language is set as [NB NM
NS Z PS PM PB]=[0.4 0.2 0.1 0 0.1 0.2 0.4], therefore set the coordination thresholding ε of voltageuco=
0.2, the DFIG action thresholdings of voltage are εuDFIG=0.1.The corresponding frequency departure amount of fuzzy language is set as [NB NM NS Z
PS PM PB]=[5 21012 5], therefore the coordination thresholding ε of setpoint frequencyfco=2, the DFIG action doors of frequency
It is limited to εfDFIG=1.
After new Wind turbines are incorporated to system, by DFIG the and STACOM/BESS coordinated control systems that have been started up
Active and reactive requirement.But the control capability of DFIG is big, control action is slower, and STATCOM control capabilities are small, response speed
It hurry up, therefore control started using the coordination of fuzzy, the different operating modes started for wind turbine provide fast reaction, and continue to supervise
Examining system voltage and frequency.After system tends towards stability, a wind-powered electricity generation group of planes will continue to be incorporated to new Wind turbines, until all wind
Motor group enters operating status, and a wind-powered electricity generation group of planes is coordinated self-starting and terminated.
Claims (5)
1. an a kind of wind-powered electricity generation group of planes based on STATCOM/BESS coordinates booting-self controller method, it is characterised in that：Including following step
Suddenly：
S1：When DFIG self-startings under the conditions of off-network start, model feature during for DFIG self-startings, design is based on anti-
Present the booting-self controller device of linear control method；The design procedure of feedback linearization control algolithm in the step S1 is as follows：
S1.1：The linearisation difference model of the rotor-side converter of DFIG is established, as shown in formula (3)：
In formula (3),For rotor d shaft currents,For rotor q shaft currents, LmFor stator and rotor coaxial dummy in dq axis coordinate systems around
Mutual inductance between group, LsFor the self-induction of the equivalent two-phase stator winding of dq coordinate systems, Rr、LrFor rotor equivalent two-phase in dq axis coordinate systems
Winding resistance and self-induction,For generator magnetic leakage factor, ωslip=ω1-ωrFor revolutional slip, ω1Turn for stator field
Speed, ωrFor rotor field rotating speed, ψsqFor stator q axis magnetic linkages, ψsdFor stator d axis magnetic linkages, urdFor rotor d shaft voltages, urqTo turn
Sub- q shaft voltages, urd1And urq1For meter and Stator energization current compensation term, as shown in formula (4)：
In formula (4), RsFor equivalent two phase winding resistance of stator in dq axis coordinate systems, isdFor stator d shaft currents, isqFor stator q axis
Electric current, UsFor fan outlet side voltage magnitude；
Make y1=h1(x)=x1=irdAnd y2=h2(x)=x2=irq, can obtain：
In formula (5), Ar(x)=f (x), Er(x)=g (x)；
S1.2：Rotor voltage controller is designed according to formula (5), as shown in formula (6)：
In formula (6), vrdAnd vrqFor the tracking control signal of rotor voltage, provided by rotor current controller, as shown in formula (7)：
In formula (7), e1=y1-y1refFor rotor current y1With rotor current reference value y1refDifference, e2=y2-y2refFor rotor electricity
Flow y2With rotor current reference value y2refDifference, krd_p、krd_iFor rotor current controller d axis scales, integral parameter, krq_p、
krq_iFor rotor current controller q axis scales, integral parameter；
S1.3：The reference voltage of rotor-side converter is tried to achieve according to formula (8)With
S2：After booting-self controller device detects the voltage and frequency stabilization of wind turbine islet operation, STATCOM/BESS is incorporated to；
S3：After DFIG and the STATCOM startup of energy-storage system, the DFIG for being not equipped with energy-storage system is incorporated to, is coordinated
Fuzzy controller starts, and fuzzy controller utilizes fuzzy PID algorithm, continue to monitor newly be incorporated to be not equipped with energy storage system
The DFIG voltages and frequency stabilization situation of system, by fuzzy reasoning, continue to optimize STATCOM and equipped with energy-storage system
The PID controller parameter of DFIG, the active reactive for coordinating control equipped with the DFIG and STATCOM of energy-storage system export.
2. the wind-powered electricity generation group of planes according to claim 1 based on STATCOM/BESS coordinates booting-self controller method, its feature
It is：Self-starting process in the step S1 is divided into self-exciting starting, run with load and frequency adjustment three phases, self-exciting starting
The control strategy that stage uses rotor-side converter and net side current transformer for：By the control signal locking of net side current transformer, together
When the grid-connected switch brk_grid of net side current transformer is disconnected, the switch brk_bat of energy-storage system is closed, makes the energy-storage system be
DC capacitor charges, and detects DC capacitor voltage, if DC capacitor voltage reaches capacitance voltage rated value, starts DFIG.
3. the wind-powered electricity generation group of planes according to claim 1 based on STATCOM/BESS coordinates booting-self controller method, its feature
It is：Self-starting process in the step S1 is divided into self-exciting starting, run with load and frequency adjustment three phases, run with load
The control strategy that stage uses rotor-side converter and net side current transformer for：Set end voltage is detected, if set end voltage is more than machine
Terminal voltage rated value, then close the grid-connected switch brk_grid of net side current transformer, while unlocks the SVPWM controls of net side current transformer
Signal, net side current transformer are started to work, and ensure that DC capacitor voltage is stable and provides reactive power support for voltage on line side；Detection
DC capacitor voltage deviation, if DC capacitor voltage deviation is less than εdc_max, then assert that DC voltage is constant, and open
Brk_bat is closed, energy-storage system exits work.
4. the wind-powered electricity generation group of planes according to claim 1 based on STATCOM/BESS coordinates booting-self controller method, its feature
It is：Self-starting process in the step S1 is divided into self-exciting starting, run with load and frequency adjustment three phases, frequency adjustment
Stage is adjusted by active output of the frequency controller to wind turbine, and the structure of frequency controller is：Frequency controller includes
Rotational speed governor and additional frequency controller, wherein rotational speed governor are by rotor speed ωrInput to ωrHave in-P curves
Work(value and power referenceωr- P curves function is determined by the power rotary speed property of Wind turbines；The design of additional frequency controller
As shown in formula (1)：
In formula (1), fs、frefThe respectively output frequency of Wind turbines and output frequency reference value, kfp1And kfp2For additional frequency
The proportionality coefficient of rate controller, kfi1And kfi2For the integral coefficient of additional frequency controller；
Finally, the active power reference value that wind turbine self-starting frequency controller provides rotor-side converter is P*：
In formula (2),For the active power reference value given by rotational speed governor.
5. the wind-powered electricity generation group of planes according to claim 1 based on STATCOM/BESS coordinates booting-self controller method, its feature
It is：In the step S3, coordinate fuzzy controller and continue to monitor voltage deviation amount and frequency departure amount, pushed away by fuzzy
Reason, continues to optimize the current transformer pid parameter k of STATCOM and DFIGp、ki、kdThe step of as follows, wherein kpFor proportionality coefficient, kiFor
Integral coefficient, kdFor differential coefficient：
S3.1：When the absolute value of voltage deviation amount | εu| more than voltage coordination thresholding εucoOr the absolute value of frequency departure amount
|εf| more than frequency coordination action thresholding εfcoWhen, STATCOM and DFIG is acted at the same time, using voltage, FREQUENCY CONTROL pattern；
Increase kp, reduce kd, reduce ki；
S3.2：When the absolute value of voltage deviation amount | εu| between voltage coordination thresholding εucoWith the voltage operation thresholding of DFIG
εuDFIGBetween, or the absolute value of frequency departure amount | εf| between frequency coordination action thresholding εfcoDoor is acted with the frequency of DFIG
Limit εfDFIGBetween when, reduce kp, increase ki；STATCOM is using voltage, FREQUENCY CONTROL pattern；
S3.3：When the absolute value of voltage deviation amount | εu| the voltage operation thresholding ε less than DFIGuDFIGOr frequency departure amount is exhausted
To value | εf| the frequency action thresholding ε less than DFIGfDFIGWhen, DFIG uses power control strategy, ensures the power stability of system
Output and power factor, fuzzy controller are failure to actuate；Increase kpAnd ki, and according to the absolute value of voltage deviation amount | εu| or
The absolute value of frequency departure amount | εf| come to kdCarry out value；
S3.4：According to the different conditions of system operation, while consider kp、ki、kdBetween association, select input language variable for
εu、εf、ΔεuWith Δ εf, linguistic variable value takes seven fuzzy values of NB, NM, NS, Z, PS, PM, PB；Select output language variable for
Δkp、Δki、Δkd, its linguistic variable value also takes NB, NM, NS, Z, PS, PM, PB, designs fuzzy rule according to engineering experience, most
The fuzzy reasoning table set up eventually；
S3.5：The fuzzy parameter adjustment formula of STATCOM is：
In formula (9), kp(n) it is the proportionality coefficient of n-th sampling instant, kp(n-1) it is the proportionality coefficient of (n-1)th sampling instant,
ki(n) it is the integral coefficient of n-th sampling instant, ki(n-1) it is the integral coefficient of (n-1)th sampling instant, kd(n) it is n-th
The differential coefficient of sampling instant, kd(n-1) it is the differential coefficient of (n-1)th sampling instant, Δ kp(n) passed through for n-th sampling instant
Cross the proportionality coefficient after fuzzy reasoning, Δ ki(n) it is integral coefficient of the n-th sampling instant after fuzzy reasoning, Δ kd(n)
For differential coefficient of the n-th sampling instant after fuzzy reasoning；
kp(n)、ki(n) and kd(n) with the absolute value of voltage deviation amount | εu| and the absolute value of frequency departure amount | εf| change,
I.e.：
In formula (10), μ=d, i, p.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610327744.3A CN105914794B (en) | 2016-05-17 | 2016-05-17 | An a kind of wind-powered electricity generation group of planes based on STATCOM/BESS coordinates booting-self controller method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610327744.3A CN105914794B (en) | 2016-05-17 | 2016-05-17 | An a kind of wind-powered electricity generation group of planes based on STATCOM/BESS coordinates booting-self controller method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105914794A CN105914794A (en) | 2016-08-31 |
| CN105914794B true CN105914794B (en) | 2018-05-04 |
Family
ID=56749354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610327744.3A Active CN105914794B (en) | 2016-05-17 | 2016-05-17 | An a kind of wind-powered electricity generation group of planes based on STATCOM/BESS coordinates booting-self controller method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105914794B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515532B (en) * | 2017-07-06 | 2020-10-09 | 江苏方天电力技术有限公司 | System self-adaptive control method considering action threshold |
| CN108181588B (en) * | 2018-03-01 | 2020-03-03 | 杭州意能电力技术有限公司 | Offshore wind power engineering power-receiving starting load test method |
| CN108667037B (en) * | 2018-04-25 | 2022-02-15 | 安徽工程大学 | STATCOM/BESS microgrid cooperative control method and system based on P-DPC |
| CN109595767A (en) * | 2018-11-15 | 2019-04-09 | 奥克斯空调股份有限公司 | A kind of control method and air conditioner of air conditioner |
| CN110714880B (en) * | 2019-11-04 | 2021-03-09 | 龙源（北京）风电工程技术有限公司 | Power generation system with multiple wind turbine generators running in parallel, power control system and method |
| CN110824920B (en) * | 2019-11-12 | 2023-06-02 | 深圳供电局有限公司 | Household energy storage power supply frequency modulation control method and system |
| US11671039B2 (en) | 2020-12-10 | 2023-06-06 | General Electric Renovables Espana, S.L. | System and method for operating an asynchronous inverter-based resource as a virtual synchronous machine to provide grid-forming control thereof |
| CN114665520B (en) * | 2022-03-02 | 2024-06-18 | 重庆大学 | Wind-solar-energy-storage cooperative voltage frequency regulation and control method applied to weak power grid and based on droop control and containing control strategy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810863A (en) * | 2015-05-11 | 2015-07-29 | 东南大学 | Generator set active power real-time dispatching method considering wind power prediction error |
| CN104836334A (en) * | 2014-02-08 | 2015-08-12 | 中国农业大学 | Low voltage microgrid group independent coordination control system |
| CN104836248A (en) * | 2015-05-20 | 2015-08-12 | 沈阳工业大学 | Hybrid energy storage system suitable for wind turbine generator set, and control method |
| CN105140938A (en) * | 2015-08-05 | 2015-12-09 | 东南大学 | Energy-storage system-based self-starting control method for double-fed induction generator |
-
2016
- 2016-05-17 CN CN201610327744.3A patent/CN105914794B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836334A (en) * | 2014-02-08 | 2015-08-12 | 中国农业大学 | Low voltage microgrid group independent coordination control system |
| CN104810863A (en) * | 2015-05-11 | 2015-07-29 | 东南大学 | Generator set active power real-time dispatching method considering wind power prediction error |
| CN104836248A (en) * | 2015-05-20 | 2015-08-12 | 沈阳工业大学 | Hybrid energy storage system suitable for wind turbine generator set, and control method |
| CN105140938A (en) * | 2015-08-05 | 2015-12-09 | 东南大学 | Energy-storage system-based self-starting control method for double-fed induction generator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105914794A (en) | 2016-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105914794B (en) | An a kind of wind-powered electricity generation group of planes based on STATCOM/BESS coordinates booting-self controller method | |
| Shen et al. | Advanced auxiliary control of an energy storage device for transient voltage support of a doubly fed induction generator | |
| CN108110799B (en) | Virtual synchronous control method and device for high-voltage direct current grid connection of island double-fed wind power plant | |
| CN111277001A (en) | Fan grid-connected control method based on virtual synchronous generator parameter adaptive control | |
| CN108183507A (en) | A kind of grid-connected active support and control structures of PMSG based on VSG | |
| CN105140938B (en) | Double-fed asynchronous Wind turbines booting-self controller method based on energy-storage system | |
| CN109659956A (en) | The virtual synchronous generator inertia damping mixing control method of multi-machine parallel connection operation | |
| CN108429289A (en) | A kind of control method and system based on virtual synchronous generator | |
| CN108631335A (en) | A kind of grid-connected active support and control structures of PMSG based on VSG | |
| Youssef et al. | Wind energy facts applications and stabilization schemes | |
| Bhukya et al. | The controlling of the DFIG based on variable speed wind turbine modeling and simulation | |
| Mohammadi et al. | Dynamic stability improvement of a power system incorporating DFIG wind power plant using optimized control parameters of a SVC | |
| Li et al. | VSG virtual inertial control strategy based on lead-lag link and fuzzy logic control | |
| CN110556842A (en) | Control method of direct-drive wind power plant inductive weak grid-connected subsynchronous oscillation suppression device | |
| CN107482685B (en) | Double-fed wind turbine generator system fault handling system and unit structure | |
| Khosravi et al. | Improvement of starting transient state in a fixed speed wind turbine using STATCOM | |
| Chowdhury et al. | Performance improvement of a grid connected direct drive wind turbine using super-capacitor energy storage | |
| CN108923443B (en) | Lyapunov coordination control method for DFIG (distributed feed control group) by adopting PGSC (PGSC) and SGSC (SGSC) | |
| Masaud | Modeling, analysis, control and design application guidelines of doubly fed induction generator (DFIG) for wind power applications | |
| CN110212546A (en) | Inhibit torsional oscillation generator terminal STATCOM output current control method and controller | |
| Verma et al. | Decoupled indirect current control of DFIG for wind energy applications | |
| Riachy et al. | Optimal power coefficient for load balancing and reactive power compensation In DFIG-WTS | |
| Rajpurohit et al. | Performance analysis of unified doubly-fed induction generator for wind power application | |
| Liu et al. | Virtual Impedance Control for Enhancing the Inertia Provision of Grid-forming Doubly-fed Induction Generator | |
| Rezaee et al. | Designing an efficient PI-based voltage control method for squirrel-cage induction generators in islanding/weak grid-connection conditions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |