CN107196338A - A kind of double-fed blower fan low-voltage ride-through method of dynamic adjustment rotor crow bar resistance - Google Patents

A kind of double-fed blower fan low-voltage ride-through method of dynamic adjustment rotor crow bar resistance Download PDF

Info

Publication number
CN107196338A
CN107196338A CN201710520798.6A CN201710520798A CN107196338A CN 107196338 A CN107196338 A CN 107196338A CN 201710520798 A CN201710520798 A CN 201710520798A CN 107196338 A CN107196338 A CN 107196338A
Authority
CN
China
Prior art keywords
voltage
resistance
crow bar
rotor
msub
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710520798.6A
Other languages
Chinese (zh)
Other versions
CN107196338B (en
Inventor
姜惠兰
范中林
周陶
贾燕琪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin University
Original Assignee
Tianjin University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tianjin University filed Critical Tianjin University
Priority to CN201710520798.6A priority Critical patent/CN107196338B/en
Publication of CN107196338A publication Critical patent/CN107196338A/en
Application granted granted Critical
Publication of CN107196338B publication Critical patent/CN107196338B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H02J3/386—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/007—Control circuits for doubly fed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
    • H02P9/102—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for limiting effects of transients
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2101/00—Special adaptation of control arrangements for generators
    • H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
    • 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

Abstract

The present invention relates to a kind of double-fed blower fan low-voltage ride-through method of dynamic adjustment rotor crow bar resistance, the Crowbar circuits of resistance are adjusted using dynamic, two parallel resistances R1, R2 are controlled by IGBT 1 and IGBT2 respectively, two IGBT cycle alternate conductions, including：When rotor current amplitude | Ir| more than threshold value Ir.thWhen, blocked rotor side converter, while it is R to put into resistancecb1Crowbar circuits, suppress free voltage and fall rotor current under depth；When dc-link capacitance voltage exceedes threshold value Udc.th1When, calculate and reduce crow bar resistance for Rcb2；When dc-link capacitance voltage exceedes threshold value Udc.th2, Udc.th2＞ Udc.th1, when, calculate and reduce crow bar resistance for Rcb3；As dc-link capacitance voltage UdcIn threshold value Udc.th2Below and rotor current IrI when dropping to its return valuer.reWhen, cut off Crowbar circuits.

Description

A kind of double-fed blower fan low-voltage ride-through method of dynamic adjustment rotor crow bar resistance
Technical field
The present invention relates to the low voltage crossing scheme of double-fed blower fan, more particularly to a kind of real-time dynamic adjustment rotor crow bar resistance The low voltage crossing scheme of value.
Background technology
With developing rapidly for Power Electronic Technique, the large-scale power electricity based on dual-feed asynchronous wind power generator (DFIG) Ratio of the sub- generating equipment in power system is improved constantly.It is quicker to electric network fault that the unique structure of double-fed blower fan result in it Sense, transient characterisitics are more complicated, it is easier to occur off-grid, jeopardize the safe operation of power system.《Wind power plant accesses power system skill Art is provided》In clearly propose the basic demand to wind power plant low voltage crossing (LVRT) ability, it is desirable to grid entry point Voltage Drop During to 20% nominal voltage, Wind turbines possess the ability that not off-grid is continuously run.
When catastrophe failure occurs in power system, there is serious Voltage Drop in DFIG generator terminals, to realize low voltage crossing, Current effective method needs to increase hardware protection equipment in DFIG rotors side mostly.Wherein, the additional crow bar of rotor-side Protection device be more conventional low-voltage ride-through method.The current correlative study on DFIG rotor crow bar crossing technologies is big Focus on is adjusted and the optimization at crow bar device switching moment improves low voltage crossing effect more by the resistance to crow bar resistance, Faulty grids are assisted to recover.Meanwhile, by design new-type crowbar circuit structure and matching crowbar circuit control strategy come The low voltage crossing performance for improving device is also the emphasis of research.
Prior art has the following disadvantages and not enough：The protection of single or multiple fixed resistance value is used rotor crowbar circuit more Circuit structure, when crow bar resistance is adjusted, generally sacrifices the inhibition of rotor overcurrent to ensure DC bus-bar voltage Not out-of-limit, low voltage crossing effect is not good.Meanwhile, under depth failure, the directly excision of rotor crow bar causes rotor current secondary The generation of impact, causes the frequent switching phenomenon repeatedly of rotor crow bar, extends rotor crow bar making time so that DFIG absorbs nothing Work(increase, is unfavorable for system voltage recovery.
The content of the invention
For not enough and defect of the prior art, the present invention provides a kind of low-voltage of dynamic adjustment rotor crow bar resistance Traversing method, the rotor crowbar circuit of resistance is adjusted using dynamic, in failure process, according to fault message and fan operation shape State, adjusts and adjusts crow bar resistance in real time, takes into account the suppression of rotor current and DC bus-bar voltage, reduction crow bar switching frequency and Making time, completes the low voltage crossing under different grid voltage sags depth.Technical scheme is as follows：
A kind of double-fed blower fan low-voltage ride-through method of dynamic adjustment rotor crow bar resistance, resistance is adjusted using dynamic Crowbar circuits, two parallel resistances R1, R2 are controlled by IGBT 1 and IGBT2 respectively, and two IGBT cycle alternate conductions are led to Cross controlling switch dutycycle and change Crowbar equivalent resistance resistances, realize the real-time tune of rotor Crowbar resistance in failure process Whole, the resistance of Crowbar equivalent resistances is
In formula, D1, D2 are respectively IGBT 1, the dutycycle of IGBT2 conducting pulsewidth；
If the rotor current threshold value of crow bar input is Ir.th, dc-link capacitance voltage early warning value is Udc.th1, dc bus Capacitance voltage maximum permissible value is Udc.th2, dc-link capacitance voltage rating is Udc.N, comprise the following steps：
(1) when rotor current amplitude | Ir| more than threshold value Ir.thWhen, blocked rotor side converter, while it is R to put into resistancecb1 Crowbar circuits, suppress free voltage and fall rotor current under depth；
(2) as dc-link capacitance voltage UdcMore than threshold value Udc.th1When, according to the fan operation parameter and voltage at this moment Fall depth calculation and reduce crow bar resistance for Rcb2, suppress the rising of dc-link capacitance voltage；
(3) as dc-link capacitance voltage UdcMore than threshold value Udc.th2, Udc.th2＞ Udc.th1, when, transported according to this moment blower fan Row parameter and Voltage Drop depth calculation simultaneously reduce crow bar resistance for Rcb3；
(4) as dc-link capacitance voltage UdcIn threshold value Udc.th2Below and rotor current IrI when dropping to its return valuer.re When, cut off Crowbar circuits；
Wherein,
Rcb1Setting principle：At the time of rotor current phase is zero, three-phase shortcircuit occurs for blower fan grid entry point and voltage falls It is 1 to fall depth, the possibility maximum I of rotor current peak value after crow bar is instantaneously put intomax.1Less than rotor current maximum permissible value Imax.th；
Rcb2Setting principle have two：
Principle 1：After crow bar input, crow bar both end voltage peak value is less than dc-link capacitance voltage early warning value Udc.th1；
Principle 2：Rotor current peak Imax.2Less than rotor current maximum permissible value Imax.th；
Rcb3Setting principle to there is two：
Principle 1：After crow bar input, crow bar both end voltage peak value is less than dc-link capacitance voltage rating Udc.N；
Principle 2：Rotor current peak Imax.3Less than rotor current maximum permissible value Imax.th；
Wherein, dc-link capacitance voltage early warning value Udc.th1It can be calculated by following formula：Udc.th1=80% (Udc.th2-Udc.N)+ Udc.N。
Compared with prior art, this programme dynamically adjusts rotor crow bar resistance in failure process, seriously falls in voltage The low voltage crossing of double-fed blower fan is realized when falling, following beneficial effect is reached：
(1) big resistance crow bar is put into initial stage in failure, it is ensured that stage rotor current impact is effectively suppressed, and reduction turns Electron current peak value.
(2) in failure process, according to fault message, crow bar resistance is adjusted in real time, by reducing crow bar step by step stage by stage Resistance, it is ensured that while rotor overcurrent inhibition, reduces dc-link capacitance voltage, completes the DFIG under different faults Low voltage crossing.
(3) corresponding crow bar resistance when reducing crowbar circuit excision, can so suppress the secondary excessively stream of rotor current and show As reducing crow bar making time and switching frequency, reducing the adverse effect recovered to system voltage.
Brief description of the drawings
Fig. 1 is dynamic adjustment resistance Crowbar circuit structure diagrams
Fig. 2 is Crowbar ADAPTIVE CONTROL figures
Fig. 3 is the grid-connected figures of DFIG of embodiment
Transient response during blower fan low voltage crossing during Fig. 4 (a) Voltage Drop 60%
Different schemes rotor current is contrasted during Fig. 4 (b) Voltage Drop 60%
Different schemes DC bus-bar voltage is contrasted during Fig. 4 (c) Voltage Drop 60%
Transient response during blower fan low voltage crossing during Fig. 5 (a) Voltage Drop 80%
Different schemes rotor current is contrasted during Fig. 5 (b) Voltage Drop 80%
Different schemes DC bus-bar voltage is contrasted during Fig. 5 (c) Voltage Drop 80%
Fig. 6 crow bar trigger signals
Embodiment
The invention provides a kind of low voltage crossing scheme of dynamic adjustment crow bar resistance, at failure initial stage, the big resistance of input It is worth the suppression that crow bar ensures rotor overcurrent.And during consequent malfunction, multiple DC bus-bar voltage threshold values are set, in DFIG DC bus-bar voltage is reached after different threshold values, falls depth according to virtual voltage and fan operation state changes real-time adaptive setting And crow bar resistance is adjusted, on the premise of rotor current inhibition is ensured, repeatedly reduce crow bar resistance step by step to suppress direct current Busbar voltage rises, and improves DFIG low voltage crossing effects under different faults depth.Reduce crow bar resistance during circuit excision simultaneously Value, suppresses rotor current re-inrush phenomena, reduces crow bar switching frequency and making time.
The present invention using dynamic adjustment resistance Crowbar circuits, its circuit structure as shown in figure 1, two parallel resistance R1, R2 is controlled by IGBT 1 and 2 respectively.Two IGBT cycle alternate conductions, Crowbar etc. can be changed by controlling switch dutycycle Resistance is imitated, the real-time adjustment of rotor Crowbar resistance in failure process is realized.
The resistance of Crowbar equivalent resistances is
In formula, D1, D2 are respectively the dutycycle of IGBT 1,2 conducting pulsewidth.
ADAPTIVE CONTROL flow chart is as shown in Figure 2.The principle of the ADAPTIVE CONTROL is as follows：
(1) when rotor current amplitude | Ir| more than threshold value Ir.thWhen (generally 2p.u.), blocked rotor side converter, simultaneously Input resistance is Rcb1Crowbar circuits, Rcb1Resistance is larger, can suppress free voltage and fall rotor current under depth；
(2) as dc-link capacitance voltage UdcMore than threshold value Udc.th1When, according to the fan operation parameter and voltage at this moment Fall depth, calculate and reduce crow bar resistance for Rcb2, suppress the rising of dc-link capacitance voltage；
(3) as dc-link capacitance voltage UdcMore than threshold value Udc.th2(Udc.th2＞ Udc.th1) when, transported according to this moment blower fan Row parameter and Voltage Drop depth calculation simultaneously reduce crow bar resistance for Rcb3；
(4) U is worked asdcIn its threshold value Udc.th2Below and rotor current IrI when dropping to its return valuer.reWhen, cut off Crowbar.
This strategy by reducing crow bar resistance step by step twice, on the premise of ensureing that dc-link capacitance voltage is not out-of-limit, Reduction crow bar resistance reduces the counter productive for causing the rotor transient current rate of decay to decline as far as possible, prevents because significantly reducing Crow bar resistance formation rotor current secondary pulse.
This strategy by reducing crow bar resistance step by step twice, on the premise of ensureing that dc-link capacitance voltage is not out-of-limit, Reduction crow bar resistance reduces the counter productive for causing the rotor transient current rate of decay to decline as far as possible, prevents because significantly reducing Crow bar resistance formation rotor current secondary pulse.Adjusting for crow bar resistance is as described below.
During failure, the rotor current after crow bar input is：
In formula, t1Moment, A (t are put into for crow bar1) for A in t1The value at moment,For crow bar input moment rotor electricity Flow valuve, τr'=σ Lr/(Rcb+Rr), it is equivalent rotor time constant after crow bar input；Rs、RrRespectively stator and rotor winding is equivalent Resistance, RcbFor equivalent rotor crow bar resistance, Ls、LrRespectively stator and rotor winding equivalent inductance, LmFor Stator and Rotor Windings mutual inductance； ωrFor rotor speed, s is revolutional slip, ωslipFor slip angular frequency, V1、V2Stator voltage amplitude respectively before and after failure, τs For rotor-side time constant, leakage inductance coefficient
(1) crow bar resistance Rcb1Adjust
Before electric network fault, because Voltage Drop depth and crow bar input moment are unknown, to ensure in Voltage Drop extremely Any depth lower rotor part electric current is effectively suppressed, crow bar resistance Rcb1It is to be adjusted according to the situation of failure most serious is considered , i.e., it is zero moment in rotor current phase, blower fan grid entry point occurs three-phase shortcircuit and Voltage Drop depth is 1 (V2=0), sled The possibility maximum I of rotor current peak value after rod is instantaneously put intomax.1Less than rotor current maximum permissible value Imax.th, its expression formula For
Imax.1＜ Imax.th (3)
When failure occurs when rotor current phase is zero, there is T/2 after a failure in the possible maximum of rotor current peak value Moment[14], then can be obtained by formula (2)
In formulaPhase is 0, A (0) and A (T/2) is respectively values of the A in 0s and T/2s.
(2) crow bar resistance Rcb2Adjust
When DC bus-bar voltage rises to early warning value Udc.th1When, to avoid the voltage out-of-limit, need according to blower fan fortune now Row state and rotor current are adjusted and reduce crow bar resistance to Rcb2, its setting principle is：
Principle 1：After crow bar input, crow bar both end voltage peak value is less than dc-link capacitance voltage early warning value Udc.th1；
Principle 2：Rotor current peak value is less than rotor current maximum permissible value Imax.th, i.e.,
|Umax|=Imax.2*Rcb2＜ Udc.th1 (5)
Imax.2＜ Imax.th (6)
I can be obtained by formula (2)max.2For on Rcb2Expression formula
In formulaFor crow bar resistance Rcb2Put into the measuring the current in the rotor value at moment, t2For Rcb2Put into moment, τ 'r2For Rcb2Equivalent rotor time constant, similar below after input.
Formula (7) is substituted into formula (5), (6) and can be calculated Rcb2Span.
Udc.th1Value can be determined by formula (8)
Udc.th1=80% (Udc.th2-Udc.N)+Udc.N (8)
In formula, Udc.NFor DC bus-bar voltage rated value, Udc.th2For maximum allowable DC bus-bar voltage.
(3) crow bar resistance Rcb3Adjust
Under depth Voltage Drop failure, the rotor current rate of climb is very fast, and amplitude is larger, dc-link capacitance voltage Lifting is more difficult to suppress, when DC bus-bar voltage is further up to Udc.th2When, it is necessary to further reduce crow bar resistance extremely Rcb3, its setting principle is：
Principle 1：After crow bar input, crow bar both end voltage peak value is less than dc-link capacitance voltage rating,
Principle 2：Rotor current peak value is less than rotor current maximum permissible value Imax.th, i.e.,
|Umax|=Imax.3*Rcb3＜ Udc.N (9)
Imax.3＜ Imax.th (10)
Imax.3It can equally be obtained by formula (2)
The one machine infinity bus system of certain wind power plant containing DFIG is as shown in Figure 3.DFIG grid entry points occur three when being set in 0.05s Phase short trouble, continues after 200ms, in 0.25s failure removals.To verify the validity of this programme in low voltage crossing, point The fixed crow bar resistance Crowbar of tradition under other (60% and 80% Voltage Drop) to different faults, parallel connection PDR resistance Crowbar schemes[1]Simulation comparison analysis is carried out with the blower fan LVRT characteristics of this programme, three kinds of schemes are using detection rotor The mode of excessively stream triggers Crowbar, works as Ir＞ 2IrNWhen crow bar put into, Ir＜ IrNWhen crow bar delay 0.005s excision.Direct current is female Line voltage maximum permissible value Udc.th2For 1400V.
Under 60% Voltage Drop depth, put into initial stage in failure due to this programme it can be seen from Fig. 4 (b), (c) Crow bar resistance is more than other two schemes, therefore rotor current peak value inhibition is more preferable.Meanwhile, in the suppression side of DC bus-bar voltage Face, the crow bar that tradition determines resistance can not suppress DC bus-bar voltage, cause its out-of-limit；Scheme with PDR resistance is by constantly throwing Enter and excision is connected in parallel on rotor crow bar determines resistance small resistor, it is ensured that DC bus-bar voltage is constantly in maximum permissible value or so； This programme by changing crow bar resistance in real time in failure process, and DC bus-bar voltage die-away time shifts to an earlier date, the rate of decay faster, It ensure that rotor current inhibition simultaneously.
Under the low depth of 80% voltage, there are Fig. 5 (b), (c) as can be seen that the scheme with PDR resistance is in parallel in crow bar During small resistor constantly input and excision, rotor current rises herein, forms up to 5.69p.u. new peak value, rotor Electric current inhibition is poor；This programme ensure that the inhibition of rotor current in the big resistance crow bar that failure is put into initial stage, Rotor current peak value is far below the former, is maintained at 4p.u..In terms of the restriction effect of DC bus-bar voltage, this programme is to turning After sub- crow bar resistance is adjusted, the DC bus-bar voltage rate of decay will be faster than the scheme with PDR resistance, and tradition fixes resistance The DC bus-bar voltage being worth under crow bar scheme is out-of-limit, has reached 1600V, it is impossible to complete low voltage crossing task.
Fig. 6 contrasts the rotor crow bar switching trigger signal of three kinds of schemes, during traditional fixed resistance value rotor Crowbar input Between most long input number of times it is more, PDR in parallel Crowbar schemes are after rotor current decline there is still a need for input PDR resistance suppressions DC bus-bar voltage processed, causing its crow bar to put into number of times and making time substantially increases.Dynamic adjustment resistance Crowbar schemes are bright It is aobvious to be less than other two schemes, effectively reduce switching loss and the adverse effect for recovering to cause to system voltage.
Relevant references：
[1] adaptive double-fed wind power generator low voltage crossings of Zhang Man, Jiang Hui the orchid based on crow bar dynamic electric resistor in parallel [J] electrotechnics journals, 2014,29 (2):271-278.

Claims (2)

1. a kind of double-fed blower fan low-voltage ride-through method of dynamic adjustment rotor crow bar resistance, resistance is adjusted using dynamic Crowbar circuits, two parallel resistances R1, R2 are controlled by IGBT 1 and IGBT2 respectively, and two IGBT cycle alternate conductions are led to Cross controlling switch dutycycle and change Crowbar equivalent resistance resistances, realize the real-time tune of rotor Crowbar resistance in failure process It is whole.The resistance of Crowbar equivalent resistances is
<mrow> <msub> <mi>R</mi> <mrow> <mi>a</mi> <mi>v</mi> </mrow> </msub> <mo>=</mo> <mfrac> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <msub> <mi>R</mi> <mn>2</mn> </msub> </mrow> <mrow> <msub> <mi>D</mi> <mn>1</mn> </msub> <msub> <mi>R</mi> <mn>2</mn> </msub> <mo>+</mo> <msub> <mi>D</mi> <mn>2</mn> </msub> <msub> <mi>R</mi> <mn>1</mn> </msub> </mrow> </mfrac> </mrow>
In formula, D1, D2 are respectively IGBT 1, the dutycycle of IGBT2 conducting pulsewidth；
If the rotor current threshold value of crow bar input is Ir.th, dc-link capacitance voltage early warning value is Udc.th1, dc-link capacitance Voltage maximum permissible value is Udc.th2, dc-link capacitance voltage rating is Udc.N, comprise the following steps：
(1) when rotor current amplitude | Ir| more than threshold value Ir.thWhen, blocked rotor side converter, while it is R to put into resistancecb1's Crowbar circuits, suppression free voltage falls the rotor current under depth；
(2) as dc-link capacitance voltage UdcMore than threshold value Udc.th1When, according to the fan operation parameter and Voltage Drop at this moment Depth calculation simultaneously reduces crow bar resistance for Rcb2, suppress the rising of dc-link capacitance voltage；
(3) as dc-link capacitance voltage UdcMore than threshold value Udc.th2, Udc.th2＞ Udc.th1, when, joined according to this moment fan operation Number and Voltage Drop depth calculation simultaneously reduce crow bar resistance for Rcb3；
(4) as dc-link capacitance voltage UdcIn threshold value Udc.th2Below and rotor current IrI when dropping to its return valuer.reWhen, cut Except Crowbar circuits；
Wherein,
Rcb1Setting principle：At the time of rotor current phase is zero, blower fan grid entry point occurs three-phase shortcircuit and Voltage Drop is deep Spend for 1, the possibility maximum I of rotor current peak value after crow bar is instantaneously put intomax.1Less than rotor current maximum permissible value Imax.th；
Rcb2Setting principle have two：
Principle 1：After crow bar input, crow bar both end voltage peak value is less than dc-link capacitance voltage early warning value Udc.th1；
Principle 2：Rotor current peak Imax.2Less than rotor current maximum permissible value Imax.th；
Rcb3Setting principle to there is two：
Principle 1：After crow bar input, crow bar both end voltage peak value is less than dc-link capacitance voltage rating Udc.N；
Principle 2：Rotor current peak Imax.3Less than rotor current maximum permissible value Imax.th。
2. double-fed blower fan low-voltage ride-through method according to claim 1, it is characterised in that dc-link capacitance voltage is pre- Alert value Udc.th1It can be calculated by following formula：Udc.th1=80% (Udc.th2-Udc.N)+Udc.N。
CN201710520798.6A 2017-06-30 2017-06-30 A kind of double-fed blower low-voltage ride-through method of dynamic adjustment rotor crow bar resistance value Active CN107196338B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710520798.6A CN107196338B (en) 2017-06-30 2017-06-30 A kind of double-fed blower low-voltage ride-through method of dynamic adjustment rotor crow bar resistance value

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710520798.6A CN107196338B (en) 2017-06-30 2017-06-30 A kind of double-fed blower low-voltage ride-through method of dynamic adjustment rotor crow bar resistance value

Publications (2)

Publication Number Publication Date
CN107196338A true CN107196338A (en) 2017-09-22
CN107196338B CN107196338B (en) 2019-10-15

Family

ID=59881730

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710520798.6A Active CN107196338B (en) 2017-06-30 2017-06-30 A kind of double-fed blower low-voltage ride-through method of dynamic adjustment rotor crow bar resistance value

Country Status (1)

Country Link
CN (1) CN107196338B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108493993A (en) * 2018-03-27 2018-09-04 上海电力学院 Adaptive double-fed fan motor low voltage crossing scheme based on rotor inline dynamic electric resistor
CN108711883A (en) * 2018-05-24 2018-10-26 国家电网公司 Coordinate fault traversing method of the wind power plant through flexible DC power transmission grid-connected system
CN109301884A (en) * 2018-11-12 2019-02-01 广东工业大学 A kind of low-voltage ride-through method of DFIG
CN109617125A (en) * 2019-01-02 2019-04-12 上海交通大学 Double-fed fan motor unit high-low voltage ride through system and method based on stator string impedance

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007113051A1 (en) * 2006-03-31 2007-10-11 Siemens Aktiengesellschaft Method for reducing the idle current requirement of a base frequency clocked supply side converter on idle and with low motor loads
CN102315651A (en) * 2011-08-02 2012-01-11 深圳市禾望电气有限公司 Crowbar circuit as well as device for double-fed induction generator to rid through power grid fault and thereof
CN103217641A (en) * 2013-04-09 2013-07-24 许继集团有限公司 Device and method for testing CROWBAR circuit of wind power converter
CN105048497A (en) * 2015-07-13 2015-11-11 国家电网公司 Doubly-fed wind turbine generator low-voltage ride through method
CN105140959A (en) * 2015-08-31 2015-12-09 国家电网公司 Adjustable-resistance crowbar circuit and regulation and control method therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007113051A1 (en) * 2006-03-31 2007-10-11 Siemens Aktiengesellschaft Method for reducing the idle current requirement of a base frequency clocked supply side converter on idle and with low motor loads
US20090278511A1 (en) * 2006-03-31 2009-11-12 Siemens Aktiengesellschaft Method for reducing the reactive power requirement of a fundamental frequency clocked power supply side converter under no load and with low motor loading
CN102315651A (en) * 2011-08-02 2012-01-11 深圳市禾望电气有限公司 Crowbar circuit as well as device for double-fed induction generator to rid through power grid fault and thereof
CN103217641A (en) * 2013-04-09 2013-07-24 许继集团有限公司 Device and method for testing CROWBAR circuit of wind power converter
CN105048497A (en) * 2015-07-13 2015-11-11 国家电网公司 Doubly-fed wind turbine generator low-voltage ride through method
CN105140959A (en) * 2015-08-31 2015-12-09 国家电网公司 Adjustable-resistance crowbar circuit and regulation and control method therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张曼: "基于撬棒并联动态电阻的自适应双馈风力发电机低电压穿越", 《电工技术学报》 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108493993A (en) * 2018-03-27 2018-09-04 上海电力学院 Adaptive double-fed fan motor low voltage crossing scheme based on rotor inline dynamic electric resistor
CN108711883A (en) * 2018-05-24 2018-10-26 国家电网公司 Coordinate fault traversing method of the wind power plant through flexible DC power transmission grid-connected system
CN108711883B (en) * 2018-05-24 2020-07-03 国家电网公司 Coordinated fault ride-through method for wind power plant through flexible direct current power transmission grid-connected system
CN109301884A (en) * 2018-11-12 2019-02-01 广东工业大学 A kind of low-voltage ride-through method of DFIG
CN109301884B (en) * 2018-11-12 2022-04-19 广东工业大学 Low voltage ride through method of DFIG
CN109617125A (en) * 2019-01-02 2019-04-12 上海交通大学 Double-fed fan motor unit high-low voltage ride through system and method based on stator string impedance
CN109617125B (en) * 2019-01-02 2021-09-21 上海交通大学 Doubly-fed wind turbine generator high-low voltage ride through system and method based on stator string impedance

Also Published As

Publication number Publication date
CN107196338B (en) 2019-10-15

Similar Documents

Publication Publication Date Title
CN107196338B (en) A kind of double-fed blower low-voltage ride-through method of dynamic adjustment rotor crow bar resistance value
CN108879779B (en) Double-fed fan comprehensive low-voltage ride through method based on stator series dynamic reactance
CN104362667A (en) Cooperative control method of high and low voltage ride-through for doubly-fed wind turbine set
CN105140963B (en) Double-fed wind power generator system and low-voltage ride-through method based on failure current limit control
CN104410098B (en) Double-fed asynchronous generator group low voltage ride through control system and its control method
WO2019007354A1 (en) Short-circuit current calculation method for doubly-fed wind power generation system considering different slips
CN106066944A (en) Dual feedback wind power generation system short-circuit current calculation method under low voltage crossing
CN107394791A (en) Prevent the double-fed blower fan crow bar adaptive muting control method of crow bar switching repeatedly
Thet et al. Pitch control for improving the low-voltage ride-through of wind farm
CN114069709B (en) Virtual synchronous machine low voltage ride through comprehensive control method
CN103023296A (en) Control method for unloading circuit on direct current side of converter
CN102290826A (en) Method for realizing low-voltage fault ride-through of power grid by using grid-connected asynchronous wind generator set
CN106849175B (en) Doubly-fed wind turbine generator crowbar resistance value setting method
CN203561735U (en) A high-voltage ride-through testing device for a wind generating set
CN102790404A (en) Doubly-fed wind generation set with low-voltage ride-through function
Hu et al. A novel optimal design of DFIG crowbar resistor during grid faults
CN111953019A (en) Low voltage ride through control method based on stator series multistage dynamic impedance
Sartika et al. Stabilization of PMSG based wind turbine under network disturbance by using new buck controller system for DC-link protection
Mardani et al. Fault current limiting in a wind power plant equipped with a DFIG using the interface converter and an optimized located FCL
Xie et al. High voltage ride through control strategy of doubly fed induction wind generators based on active resistance
Liu et al. Research on the value of crowbar resistance to low voltage ride through of DFIG
Pengxin et al. A new lvrt method applied on the integration of distributed wind power generation
Abdellatif et al. Fault-ride through capability enhancement of DFIG-based wind turbines by SFCL
CN105897102B (en) The method of double-fed type generator unit stator magnetic linkage during accurate calculating electric network fault
Wang et al. A new method for DFIG fault ride through using resistance and capacity crowbar circuit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant