CN107181267A - Wind power plant subsynchronous resonance suppressing method and system - Google Patents
Wind power plant subsynchronous resonance suppressing method and system Download PDFInfo
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- CN107181267A CN107181267A CN201710458370.3A CN201710458370A CN107181267A CN 107181267 A CN107181267 A CN 107181267A CN 201710458370 A CN201710458370 A CN 201710458370A CN 107181267 A CN107181267 A CN 107181267A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The invention discloses a kind of wind power plant subsynchronous resonance suppressing method and system, the wind power plant at least includes：Many Fans, many transformers and wind power plant circuit, it is characterised in that including：The voltage signal and current signal, many Fans resistance and inductance, many transformer resistances and inductance, wind power plant line resistance and inductance of wind power plant circuit, subsynchronous suppression system are obtained to power network actual output current signal；The current signal of voltage signal and wind power plant circuit to the wind power plant circuit is filtered processing, obtain subsynchronous frequency signal, and according to the subsynchronous frequency signal, many Fans resistance and inductance, many transformer resistances and inductance, wind power plant line resistance and inductance, obtain wind power plant closed loop transfer function, and according to the subsynchronous suppression system to power network actual output current signal, by Optimal Parameters so that the attenuation rate under closed loop transfer function, difference zero point is optimal.The present invention can effectively improve the stability of wind power plant.
Description
Technical field
The present invention relates to technical field of power systems, more particularly to a kind of wind power plant subsynchronous resonance suppressing method and it is
System.
Background technology
When wind power plant access is containing the system for fixing series compensation capacitance, it is understood that there may be induce subsynchronous resonance (SSR)
Risk.In recent years, the existing many accidents on blower fan sub-synchronous oscillation occurred both at home and abroad., Texas, USA in 2009
One at wind field, due to transmission system break down, cut-out circuit so that series compensation degrees from 50% improve to 75%, cause
There is sub-synchronous oscillation in wind power plant, so as to cause a large amount of blower fans to damage.
In correlation technique, the method for suppressing wind power plant subsynchronous resonance is mainly change blower interior control system, passes through
Additional longitudinal forces, damping of the increase blower fan electromagnetic torque to sub-synchronous oscillation；Or during subsynchronous resonance occurs for system
Serial compensation capacitance is exited, changes system series compensation degrees, the purpose for suppressing subsynchronous resonance is reached.But, the transformation of these methods is complicated, warp
Ji property is poor.
The content of the invention
It is contemplated that at least solving one of technical problem in above-mentioned correlation technique to a certain extent.
Therefore, it is an object of the present invention to propose a kind of wind power plant subsynchronous resonance suppressing method.The wind-powered electricity generation play
Synchronous resonant suppressing method can reach the purpose for suppressing subsynchronous resonance, and improve the stability of wind power plant.
It is another object of the present invention to propose a kind of wind power plant subsynchronous resonance suppression system.
To achieve these goals, an aspect of of the present present invention discloses a kind of wind power plant subsynchronous resonance suppressing method, institute
Stating wind power plant at least includes：Many Fans, many transformers and wind power plant circuit, it is characterised in that including：Obtain wind-powered electricity generation field wire
The voltage signal and current signal on road, many Fans resistance and inductance, many transformer resistances and inductance, wind power plant line resistance
With inductance, subsynchronous suppression system to power network actual output current signal；To the voltage signal and wind-powered electricity generation of the wind power plant circuit
The current signal on field wire road is filtered processing, obtains subsynchronous frequency signal, and according to the subsynchronous frequency signal, many
Blower fan resistance and inductance, many transformer resistances and inductance, wind power plant line resistance and inductance, obtain wind power plant closed loop transmission letter
Number, and according to the subsynchronous suppression system to power network actual output current signal, by Optimal Parameters so that closed loop transmits letter
Attenuation rate under the different zero points of number is optimal.
According to the wind power plant subsynchronous resonance suppressing method of the present invention, the purpose for suppressing subsynchronous resonance can be reached, and
Improve the stability of wind power plant.
In addition, wind power plant subsynchronous resonance suppressing method according to the above embodiment of the present invention can also have following add
Technical characteristic：
Further, the formula of the wind power plant closed loop transfer function, is：
Wherein, s represents complex frequency, zhFor closed loop transfer function, Zeq(s) g zero point, yqFor closed loop transfer function, Zeq(s)
P limit, HiAnd H (s)u(s) it is respectively the voltage signal processing to the current signal and wind power plant circuit of wind power plant circuit
Transmission function,rr0For rotor resistance, KprFor rotor side controller inner ring ratio
Example coefficient, KlrFor rotor side controller inner ring integral coefficient, KDrFor rotor side controller inner ring cross-gain, ω0For power frequency angle
Frequency, ωrFor rotor angular frequency, LrFor inductor rotor, LmFor blower fan magnetizing inductance, LsFor fan stator inductance, LT1For transformer
T1 inductance, Ll1For wind power plant line inductance, rsFor stator resistance, rT1For transformer T1 resistance, rl1For wind power plant line electricity
Resistance, Ll2For serial supplementary line inductance, LT2For transformer T2 inductance, rl2For serial supplementary line resistance, rT2For transformer T2 resistance, C is string
Electric capacity is mended, n is blower fan number of units.
Further, Optimal Parameters are passed through so that the attenuation rate under transmission function difference zero point is optimal specially：
Optimize current signal gain Ki, current signal phase shifting parameter Tai, voltage signal gain Ku, voltage signal phase shifting parameter
Tau, and work as zh=σh+jωh, σhFor zero point zhReal part, ωhFor zero point zhImaginary part, mode ωhAttenuation rate ξh：
Attenuation rate ξhMeet：
Object function：Max f=min (ξh)
Constraints：
pu：Perunit value unit, nTOT：Blower fan number of units maximum.
The second aspect of the present invention discloses a kind of wind power plant subsynchronous resonance suppression system, and the wind power plant is at least wrapped
Include：Many Fans, many transformers and wind power plant circuit, including：Acquisition module, the voltage signal for obtaining wind power plant circuit
With current signal, many Fans resistance and inductance, many transformer resistances and inductance, wind power plant line resistance and inductance, secondary same
Suppression system is walked to power network actual output current signal；Processing module, for the voltage signal and wind to the wind power plant circuit
The current signal of electrical field line is filtered processing, obtains subsynchronous frequency signal, and according to the subsynchronous frequency signal, many
Fans resistance and inductance, many transformer resistances and inductance, wind power plant line resistance and inductance, obtain the transmission of wind power plant closed loop
Function, and according to the subsynchronous suppression system to power network actual output current signal, by Optimal Parameters so that closed loop is transmitted
Attenuation rate under function difference zero point is optimal.
According to the wind power plant subsynchronous resonance suppression system of the present invention, the purpose for suppressing subsynchronous resonance can be reached, and
Improve the stability of wind power plant.
In addition, wind power plant subsynchronous resonance suppression system according to the above embodiment of the present invention can also have following add
Technical characteristic：
Further, the formula of the wind power plant closed loop transfer function, is：
Wherein, s represents complex frequency, zhFor closed loop transfer function, Zeq(s) g zero point, yqFor closed loop transfer function, Zeq(s)
P limit, HiAnd H (s)u(s) it is respectively the voltage signal processing to the current signal and wind power plant circuit of wind power plant circuit
Transmission function,rr0For rotor resistance, KprFor rotor side controller inner ring ratio
Example coefficient, KlrFor rotor side controller inner ring integral coefficient, KDrFor rotor side controller inner ring cross-gain, ω0For power frequency angle
Frequency, ωrFor rotor angular frequency, LrFor inductor rotor, LmFor blower fan magnetizing inductance, LsFor fan stator inductance, LT1For transformer
T1 inductance, Ll1For wind power plant line inductance, rsFor stator resistance, rT1For transformer T1 resistance, rl1For wind power plant line electricity
Resistance, Ll2For serial supplementary line inductance, LT2For transformer T2 inductance, rl2For serial supplementary line resistance, rT2For transformer T2 resistance, C is string
Electric capacity is mended, n is blower fan number of units.
Further, Optimal Parameters are passed through so that the attenuation rate under transmission function difference zero point is optimal specially：Optimization electricity
Flow signal gain Ki, current signal phase shifting parameter Tai, voltage signal gain Ku, voltage signal phase shifting parameter Tau, and work as zh=σh+j
ωh, σhFor zero point zhReal part, ωhFor zero point zhImaginary part, mode ωhAttenuation rate ξh：
Attenuation rate ξhMeet：
Object function：Max f=min (ξh)
Constraints：
pu：Perunit value unit, nTOT：Blower fan number of units maximum.
Further, in addition to：Electronic power convertor and transformer.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the flow chart of wind power plant subsynchronous resonance suppressing method according to an embodiment of the invention；
Fig. 2 is the structure chart of wind power plant access string complement system according to an embodiment of the invention；
Fig. 3 is the policy map of wind power plant subsynchronous resonance suppressing method according to an embodiment of the invention；
Fig. 4 is the structured flowchart of wind power plant subsynchronous resonance suppression system according to an embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
Wind power plant subsynchronous resonance suppressing method according to embodiments of the present invention is described and subsynchronous humorous below in conjunction with accompanying drawing
Shake suppression system.
Fig. 1 is the flow chart of wind power plant subsynchronous resonance suppressing method according to an embodiment of the invention.
Before explanation the method, with reference to shown in Fig. 2, wind power plant at least includes：Many Fans, many transformers and wind power plant
Circuit.Wind power plant subsynchronous resonance suppressing method is performed in windfarm system.
As shown in figure 1, wind power plant subsynchronous resonance suppressing method according to an embodiment of the invention, including：
S110：Obtain the voltage signal and current signal, many Fans resistance and inductance, many transformers of wind power plant circuit
Resistance and inductance, wind power plant line resistance and inductance, subsynchronous suppression system are to power network actual output current signal.
With reference to shown in Fig. 2, the voltage signal u of wind power plant circuit is obtainedabcWith the current signal i of wind power plant circuitabc, it is secondary same
Suppression system is walked to power network actual output current signal iout。
S120：The current signal of voltage signal and wind power plant circuit to wind power plant circuit is filtered processing, obtains secondary
Synchronous frequency signal, and according to subsynchronous frequency signal, many Fans resistance and inductance, many transformer resistances and inductance, wind
Electrical field line resistance and inductance, obtain wind power plant closed loop transfer function, and according to subsynchronous suppression system to power network reality output
Current signal, by Optimal Parameters so that the attenuation rate under closed loop transfer function, difference zero point is optimal.
Specifically, to the voltage signal u of wind power plant circuitabcWith the current signal i of wind power plant circuitabcIt is filtered place
Reason, obtains subsynchronous frequency signal.
According to subsynchronous frequency signal, many Fans resistance and inductance, many transformer resistances and inductance and wind-powered electricity generation field wire
Road resistance and inductance obtain wind power plant closed loop transfer function, wherein, the formula of wind power plant closed loop transfer function, is：
Wherein, s represents complex frequency, zhFor closed loop transfer function, Zeq(s) g zero point, yqFor closed loop transfer function, Zeq(s)
P limit, HiAnd H (s)u(s) it is respectively the voltage signal processing to the current signal and wind power plant circuit of wind power plant circuit
Transmission function,rr0For rotor resistance, KprFor rotor side controller inner ring ratio
Example coefficient, KlrFor rotor side controller inner ring integral coefficient, KDrFor rotor side controller inner ring cross-gain, ω0For power frequency angle
Frequency, ωrFor rotor angular frequency, LrFor inductor rotor, LmFor blower fan magnetizing inductance, LsFor fan stator inductance, LT1For transformer
T1 inductance, Ll1For wind power plant line inductance, rsFor stator resistance, rT1For transformer T1 resistance, rl1For wind power plant line electricity
Resistance, Ll2For serial supplementary line inductance, LT2For transformer T2 inductance, rl2For serial supplementary line resistance, rT2For transformer T2 resistance, C is string
Electric capacity is mended, n is blower fan number of units.
HiAnd H (s)u(s) the current signal i respectively to wind power plant circuitabcWith the voltage signal u of wind power plant circuitabcPlace
The transmission function of reason：
iout(s)=iabc(s)Hi(s)+uabc(s)Hu(s)
Hi(s)=HF(s)KiHcom,i(s)Hd(s)
Hu(s)=HF(s)KuHcom,u(s)Hd(s)
HF(s)=HP(s)HS(s)HSH(s)
Bandpass filter transfer function HP(s) so that with ωPCentered on the subsynchronous signal of angular frequency pass through, wherein ζ is
Damped coefficient：
Angular frequency is ωSBandstop filter transfer function HS(s) power frequency component, is filtered out：
ωSH=2 ωS-ωP, angular frequency is ωSHBandstop filter transfer function HSH(s), filter out and subsynchronous component
Complementary frequency signal：
Current signal ratio phase shift transfer function Hcom,i(s), wherein, KiRepresent current signal gain, TaiRepresent electric current letter
Number phase shifting parameter：
Voltage signal ratio phase shift transfer function Hcom,u(s), wherein, KuRepresent voltage signal gain, TauRepresent voltage letter
Number phase shifting parameter：
Postpones signal transfer function Hd(s), the wherein gain parameter k of postpones signal transmission functiondWith phase offset parameter Td
It can be obtained by open-loop test:
Second step, the selection of wind power plant closed loop transfer function, parameter.First, closed loop transfer function, Zeq(s) g zero point be
zh。Zeq(s) p limit is yq。
Note：
Make zh=σh+jωh, σhFor zero point zhReal part, ωhFor zero point zhImaginary part
Mode ωhAttenuation rate ξh：
By the optimized algorithm such as genetic algorithm or plan annealing, optimal current signal gain K is calculatedi, current signal phase shift ginseng
Number Tai, voltage signal gain Ku, voltage signal phase shifting parameter Tau, that is, carry out ratio phase shift link, gain link so that attenuation rate
ξhMeet：(1)ξh>0；(2) in all operating modes, ωr∈ [0.7pu, 1.3pu], n=1...nTOT, minimum attenuation rate min
(ξh) maximize.pu：Perunit value unit, nTOT：Blower fan number of units maximum.
Object function：Max f=min (ξh)
Constraints：
That is, with reference to shown in Fig. 3, the present invention is filtered by the voltage signal and current signal of wind power plant circuit
Processing, obtains subsynchronous frequency signal, and according to the subsynchronous frequency signal passing ratio phase shift link, phase after gain link
Plus obtain current reference signal iref.The current reference signal i that electronic power convertor is sent according to controllerrefOutput current is simultaneously
Subsynchronous suppression system is obtained to power network actual output current signal i by transformerout。
Fig. 4 is the structure chart of wind power plant subsynchronous resonance suppression system according to an embodiment of the invention.
As shown in figure 4, wind power plant subsynchronous resonance suppression system 400 according to an embodiment of the invention, wind power plant is extremely
Include less：Many Fans, many transformers and wind power plant circuit, including：Acquisition module 410, processing module 420.
Wherein, acquisition module 410 be used to obtaining the voltage signal and current signal of wind power plant circuit, many Fans resistance and
Inductance, many transformer resistances and inductance, wind power plant line resistance and inductance, subsynchronous suppression system are electric to power network reality output
Flow signal.Processing module 420 is used to be filtered place to the voltage signal of wind power plant circuit and the current signal of wind power plant circuit
Reason, obtains subsynchronous frequency signal, and according to subsynchronous frequency signal, many Fans resistance and inductance, many transformer resistances
With inductance, wind power plant line resistance and inductance, wind power plant closed loop transfer function, is obtained, and according to subsynchronous suppression system to power network
Actual output current signal, by Optimal Parameters so that the attenuation rate under closed loop transfer function, difference zero point is optimal.
According to the wind power plant subsynchronous resonance suppression system of the present invention, the purpose for suppressing subsynchronous resonance can be reached, and
Improve the stability of wind power plant.
Further, the formula of wind power plant closed loop transfer function, is：
Wherein, s represents complex frequency, zhFor closed loop transfer function, Zeq(s) g zero point, yqFor closed loop transfer function, Zeq(s)
P limit, HiAnd H (s)u(s) it is respectively the voltage signal processing to the current signal and wind power plant circuit of wind power plant circuit
Transmission function,rr0For rotor resistance, KprFor rotor side controller inner ring ratio
Example coefficient, KlrFor rotor side controller inner ring integral coefficient, KDrFor rotor side controller inner ring cross-gain, ω0For power frequency angle
Frequency, ωrFor rotor angular frequency, LrFor inductor rotor, LmFor blower fan magnetizing inductance, LsFor fan stator inductance, LT1For transformer
T1 inductance, Ll1For wind power plant line inductance, rsFor stator resistance, rT1For transformer T1 resistance, rl1For wind power plant line electricity
Resistance, Ll2For serial supplementary line inductance, LT2For transformer T2 inductance, rl2For serial supplementary line resistance, rT2For transformer T2 resistance, C is string
Electric capacity is mended, n is blower fan number of units.
Further, Optimal Parameters are passed through so that the attenuation rate under transmission function difference zero point is optimal specially：Optimization electricity
Flow signal gain Ki, current signal phase shifting parameter Tai, voltage signal gain Ku, voltage signal phase shifting parameter Tau, and work as zh=σh+j
ωh, σhFor zero point zhReal part, ωhFor zero point zhImaginary part, mode ωhAttenuation rate ξh：
Attenuation rate ξhMeet：
Object function：Max f=min (ξh)
Constraints：
pu：Perunit value unit, nTOT：Blower fan number of units maximum.
It should be noted that the specific implementation of the wind power plant subsynchronous resonance suppression system of the embodiments of the present invention
It is similar with the specific implementation of the wind power plant subsynchronous resonance suppressing method of the embodiment of the present invention, specifically refer to wind-powered electricity generation play
The description of synchronous resonant suppressing method part, in order to reduce redundancy, is not repeated herein.
In some instances, as shown in figure 3, also including：Electronic power convertor and transformer.
Specifically, with reference to shown in Fig. 3, the voltage signal u of wind power plant circuitabcWith current signal iabcCarry out signal filtering
Processing, obtains subsynchronous frequency signal, and according to the subsynchronous frequency signal passing ratio phase shift link, phase after gain link
Plus obtain current reference signal iref.Current reference signal irefObtained by electronic power convertor output current and by transformer
To subsynchronous suppression system to power network actual output current signal iout, flow into power network.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (7)
1. a kind of wind power plant subsynchronous resonance suppressing method, the wind power plant at least includes：Many Fans, many transformers and wind
Electrical field line, it is characterised in that including：
Obtain the voltage signal and current signal, many Fans resistance and inductance, many transformer resistances and electricity of wind power plant circuit
Sense, wind power plant line resistance and inductance, subsynchronous suppression system are to power network actual output current signal；
The current signal of voltage signal and wind power plant circuit to the wind power plant circuit is filtered processing, obtains subsynchronous frequency
Rate signal, and according to the subsynchronous frequency signal, many Fans resistance and inductance, many transformer resistances and inductance, wind-powered electricity generation
Field line resistance and inductance, obtain wind power plant closed loop transfer function, and actually defeated to power network according to the subsynchronous suppression system
Go out current signal, by Optimal Parameters so that the attenuation rate under closed loop transfer function, difference zero point is optimal.
2. wind power plant subsynchronous resonance suppressing method according to claim 1, it is characterised in that the wind power plant closed loop is passed
The formula of delivery function is：
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Wherein, s represents complex frequency, zhFor closed loop transfer function, Zeq(s) g zero point, yqFor closed loop transfer function, Zeq(s) p
Individual limit, HiAnd H (s)u(s) biography of the voltage signal processing of current signal and wind power plant circuit respectively to wind power plant circuit
Delivery function,rr0For rotor resistance, KprFor rotor side controller inner ring ratio
Coefficient, KlrFor rotor side controller inner ring integral coefficient, KDrFor rotor side controller inner ring cross-gain, ω0For power frequency angular frequency
Rate, ωrFor rotor angular frequency, LrFor inductor rotor, LmFor blower fan magnetizing inductance, LsFor fan stator inductance, LT1For transformer T1
Inductance, Ll1For wind power plant line inductance, rsFor stator resistance, rT1For transformer T1 resistance, rl1For wind power plant line resistance,
Ll2For serial supplementary line inductance, LT2For transformer T2 inductance, rl2For serial supplementary line resistance, rT2For transformer T2 resistance, C mends for string
Electric capacity, n is blower fan number of units.
3. wind power plant subsynchronous resonance suppressing method according to claim 2, it is characterised in that by Optimal Parameters, make
The attenuation rate obtained under the different zero points of transmission function is optimal specially：
Optimize current signal gain Ki, current signal phase shifting parameter Tai, voltage signal gain Ku, voltage signal phase shifting parameter Tau,
And work as zh=σh+jωh, σhFor zero point zhReal part, ωhFor zero point zhImaginary part, mode ωhAttenuation rate ξh：
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Attenuation rate ξhMeet：
Object function：Max f=min (ξh)
Constraints：
pu：Perunit value unit, nTOT：Blower fan number of units maximum.
4. a kind of wind power plant subsynchronous resonance suppression system, it is characterised in that the wind power plant at least includes：Many Fans are more
Platform transformer and wind power plant circuit, including：
Acquisition module, voltage signal and current signal, many Fans resistance and inductance, many changes for obtaining wind power plant circuit
Depressor resistance and inductance, wind power plant line resistance and inductance, subsynchronous suppression system are to power network actual output current signal；
Processing module, place is filtered for the voltage signal and the current signal of wind power plant circuit to the wind power plant circuit
Reason, obtains subsynchronous frequency signal, and according to the subsynchronous frequency signal, many Fans resistance and inductance, many transformers
Resistance and inductance, wind power plant line resistance and inductance, obtain wind power plant closed loop transfer function, and be according to the subsynchronous suppression
Unite to power network actual output current signal, by Optimal Parameters so that the attenuation rate under closed loop transfer function, difference zero point is optimal.
5. wind power plant subsynchronous resonance suppression system according to claim 4, it is characterised in that the wind power plant closed loop is passed
The formula of delivery function is：
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Wherein, s represents complex frequency, zhFor closed loop transfer function, Zeq(s) g zero point, yqFor closed loop transfer function, Zeq(s) p
Individual limit, HiAnd H (s)u(s) biography of the voltage signal processing of current signal and wind power plant circuit respectively to wind power plant circuit
Delivery function,rr0For rotor resistance, KprFor rotor side controller inner ring ratio
Coefficient, KlrFor rotor side controller inner ring integral coefficient, KDrFor rotor side controller inner ring cross-gain, ω0For power frequency angular frequency
Rate, ωrFor rotor angular frequency, LrFor inductor rotor, LmFor blower fan magnetizing inductance, LsFor fan stator inductance, LT1For transformer T1
Inductance, Ll1For wind power plant line inductance, rsFor stator resistance, rT1For transformer T1 resistance, rl1For wind power plant line resistance,
Ll2For serial supplementary line inductance, LT2For transformer T2 inductance, rl2For serial supplementary line resistance, rT2For transformer T2 resistance, C mends for string
Electric capacity, n is blower fan number of units.
6. wind power plant subsynchronous resonance suppression system according to claim 5, it is characterised in that by Optimal Parameters, make
The attenuation rate obtained under the different zero points of transmission function is optimal specially：
Optimize current signal gain Ki, current signal phase shifting parameter Tai, voltage signal gain Ku, voltage signal phase shifting parameter Tau,
And work as zh=σh+jωh, σhFor zero point zhReal part, ωhFor zero point zhImaginary part, mode ωhAttenuation rate ξh：
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<msub>
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2
Attenuation rate ξhMeet：
Object function：Max f=min (ξh)
Constraints：
pu：Perunit value unit, nTOT：Blower fan number of units maximum.
7. wind power plant subsynchronous resonance suppression system according to claim 4, it is characterised in that also include：Power electronics
Current transformer and transformer.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281980A (en) * | 2018-01-26 | 2018-07-13 | 国网山西省电力公司电力科学研究院 | The method for real time discriminating of double-fed wind turbine wind power plant subsynchronous resonance system stability |
| CN108400591A (en) * | 2018-04-11 | 2018-08-14 | 华北电力大学 | A kind of wind power plant subsynchronous resonance suppressing method based on parallel connection type voltage source converter |
| CN108599236A (en) * | 2018-04-24 | 2018-09-28 | 华北电力科学研究院有限责任公司 | Double-fed fan motor play synchronized oscillation SVG suppressing methods and device |
| CN109193699A (en) * | 2018-09-28 | 2019-01-11 | 上海交通大学 | The wind power unit converter PI parameter optimization method inhibited for sub-synchronous oscillation |
| CN109888776A (en) * | 2019-03-12 | 2019-06-14 | 深圳大学 | For the prediction technique and terminal device of direct-driving type wind power plant subsynchronous resonance frequency |
| CN110912156A (en) * | 2019-12-05 | 2020-03-24 | 国家电网公司华北分部 | Method and device for inhibiting doubly-fed fan subsynchronous resonance |
| CN117996741A (en) * | 2024-01-30 | 2024-05-07 | 山东大学 | Double-fed fan subsynchronous oscillation suppression method and system |
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| CN102290821A (en) * | 2011-08-31 | 2011-12-21 | 东南大学 | Damping stable region of electric power system and determining method thereof |
| CN104410084A (en) * | 2014-11-20 | 2015-03-11 | 清华大学 | Method for controlling sub-synchronous resonance of wind power station series compensated transmission system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102290821A (en) * | 2011-08-31 | 2011-12-21 | 东南大学 | Damping stable region of electric power system and determining method thereof |
| CN104410084A (en) * | 2014-11-20 | 2015-03-11 | 清华大学 | Method for controlling sub-synchronous resonance of wind power station series compensated transmission system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281980A (en) * | 2018-01-26 | 2018-07-13 | 国网山西省电力公司电力科学研究院 | The method for real time discriminating of double-fed wind turbine wind power plant subsynchronous resonance system stability |
| CN108281980B (en) * | 2018-01-26 | 2021-03-26 | 国网山西省电力公司电力科学研究院 | Method for judging stability of wind power field subsynchronous resonance system of doubly-fed wind turbine in real time |
| CN108400591A (en) * | 2018-04-11 | 2018-08-14 | 华北电力大学 | A kind of wind power plant subsynchronous resonance suppressing method based on parallel connection type voltage source converter |
| CN108599236A (en) * | 2018-04-24 | 2018-09-28 | 华北电力科学研究院有限责任公司 | Double-fed fan motor play synchronized oscillation SVG suppressing methods and device |
| CN108599236B (en) * | 2018-04-24 | 2020-08-14 | 华北电力科学研究院有限责任公司 | Method and device for restraining sub-synchronous oscillation SVG (static var generator) of doubly-fed wind power plant |
| CN109193699A (en) * | 2018-09-28 | 2019-01-11 | 上海交通大学 | The wind power unit converter PI parameter optimization method inhibited for sub-synchronous oscillation |
| CN109888776A (en) * | 2019-03-12 | 2019-06-14 | 深圳大学 | For the prediction technique and terminal device of direct-driving type wind power plant subsynchronous resonance frequency |
| CN109888776B (en) * | 2019-03-12 | 2022-08-05 | 深圳大学 | Prediction method for sub-synchronous resonant frequency of direct-drive wind power plant and terminal equipment |
| CN110912156A (en) * | 2019-12-05 | 2020-03-24 | 国家电网公司华北分部 | Method and device for inhibiting doubly-fed fan subsynchronous resonance |
| CN117996741A (en) * | 2024-01-30 | 2024-05-07 | 山东大学 | Double-fed fan subsynchronous oscillation suppression method and system |
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