CN205610233U - Protection circuit is passed through to modified double -fed wind turbine generator system trouble - Google Patents
Protection circuit is passed through to modified double -fed wind turbine generator system trouble Download PDFInfo
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- CN205610233U CN205610233U CN201620302191.1U CN201620302191U CN205610233U CN 205610233 U CN205610233 U CN 205610233U CN 201620302191 U CN201620302191 U CN 201620302191U CN 205610233 U CN205610233 U CN 205610233U
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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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- 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
- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses a belong to wind -powered electricity generation protection field, concretely relates to protection circuit is passed through to modified double -fed wind turbine generator system trouble, include: current -limiting circuit a, bypass circuit a, current -limiting circuit b, bypass circuit b, wherein, a current -limiting circuit an and a bypass circuit an are parallelly connected, and circuit of this parallelly connected relation has three groups, and its one end is that three -phase input U1, V1, W1 meet double -fed induction machine rotor three -phase winding among the double -fed wind turbine generator system respectively, and the other end is that three -phase output terminal U2, V2, W2 connect rotor side converter three -phase AC output in the double -fed wind turbine generator system converter structure, another current -limiting circuit b has three groups, and it can triangle -shaped be connected also can star connection, and the lead -out wire is respectively through the bypass circuit b that corresponds in contact with stating three -phase input U1, V1, W1. The utility model discloses the problem out of control that double -fed motor appears in the time of can solving many digital circuit and press under the trouble protection of traditional lever can improve double -fed wind turbine generator system transient response and the trouble ability of passing through.
Description
Technical field
This utility model relates to wind-powered electricity generation protection field, in particular it relates to the double-fed fan motor unit fault traversing protection circuit of a kind of improvement.
Background technology
In order to tackle energy crisis and ecological deterioration, what countries in the world were the most positive promotes the development and utilization of regenerative resource.Wherein wind-power electricity generation has become scientific research personnel and commercial enterprise's focus of attention.This is because wind energy is a kind of supply of electric power source reliable, unlimited, reproducible.The large-scale application of wind-powered electricity generation both can alleviate again conventional energy resource and use the environmental problem brought with alleviating energy crisis, thus reduce the discharge of carbon dioxide.
But, large-scale wind power accesses electrical network and but brings bigger challenge to electric power netting safe running.Therefore, new Grid code requirement, want to access operation of power networks, Wind turbines must possess fault ride-through capacity.Double-fed wind turbine winding directly gets access to grid, and causes it more sensitive to grid disturbances, fault traversing problem most challenge.
At present, more ripe double-fed fan motor unit fault traversing technology is so-called crow bar (Crowbar) protection circuit.When double-fed fan motor unit suffers Voltage Drop, due to electromagnetic relationship complicated between rotor, rotor overcurrent can be caused, thus destroy changer.And the protection of so-called crow bar be exactly for rotor fault electric current offer bypass path, thus rotor overcurrent is avoided to destroy changer to realize uninterruptedly being incorporated into the power networks of unit.
Chinese invention patent such as Publication No. 103178548A, the patent provides the symmetrical fault ride-through control of a kind of double-fed wind power generator group, the method is under the electric network fault of double-fed wind power generator group, when the electric current flowing into rotor converter exceedes its maximum allowed current value, the rotor Crowbar circuit of described double-fed wind power generator group puts into operation, rotor converter described in locking simultaneously；During fault occurs, when, after described rotor Crowbar circuit puts into τ r duration and when rotor current is less than Crowbar protection act threshold value, described rotor Crowbar circuit is cut, restarts described rotor converter simultaneously；After failure removal, described rotor converter, by recovering controlling tactic switch to active power mode of operation, and stops to electrical network injecting reactive current.Utilize the method can overcome defect present in existing fault traversing control strategy, thus improve the fault ride-through capacity of double-fed wind power generator group.
But, above-mentioned patent crow bar resist technology but has a disadvantage in that
1), after crow bar puts into, double feedback electric engine machine-side converter blocks, and motor is in runaway condition, runs on asynchronous machine state；
2) under these conditions, generating unit speed stability deteriorates, and absorbs idle to electrical network, is unfavorable for the fault traversing of unit.
Summary of the invention
For defect of the prior art; this utility model provides the double-fed fan motor unit fault traversing protection circuit of a kind of improvement; it can solve double feedback electric engine problem out of control under most of voltage failure; it is thus possible to stabilisation systems rotating speed; the too fast increase of suppression system rotating speed during fault; support line voltage, thus strengthen the ability of double-fed fan motor unit fault traversing.
This utility model is achieved through the following technical solutions:
This utility model includes: current-limiting circuit a, bypass circuit a, current-limiting circuit b, bypass circuit b, wherein, and current-limiting circuit a and a bypass circuit a are in parallel, and the circuit of this parallel relationship has three groups, its one end i.e. three-phase input end U1、V1、W1Connect doubly fed induction generator rotor three-phase winding in double-fed fan motor unit respectively, the other end i.e. three-phase output end U2、V2、W2Connect double-fed fan motor unit converter structure rotor side converter three-phase alternating current outfan；Another current-limiting circuit b has three groups, its can with triangle connect can also Y-connection, lead-out wire respectively by correspondence bypass circuit b meet above-mentioned three-phase input end U1、V1、W1。
Described bypass circuit a, under normal grid conditions, in the conduction state；When electric network fault, when doubly fed induction generator rotor current is more than set-point 1, it is in blocking state.
Described bypass circuit b, under normal grid conditions, is in blocking state；When electric network fault, when doubly fed induction generator rotor current is more than set-point 2, in the conduction state.
Described set-point 2 is more than set-point 1.
Described current-limiting circuit a includes current-limiting impedance, and it has three groups, and one end of each group is connected with corresponding bypass circuit a one end, and the other end is connected with the corresponding bypass circuit a other end.
Described bypass circuit a includes bypassing power switch, and it has three groups, and one end of each group is connected with corresponding current-limiting circuit a one end, and the other end is connected with the corresponding current-limiting circuit a other end.
Described current-limiting circuit b includes current-limiting impedance, and it has three groups, and it has two kinds of modes of connection, one be delta connection, another kind be star connection, lead-out wire meets above-mentioned three-phase input end U by corresponding bypass circuit b respectively1、V1、W1。
Described bypass circuit b includes bypassing power switch, and it has three groups, and one end meets three-phase input end U respectively1、V1、W1, the other end connects current-limiting circuit b respectively.
Compared with prior art; this utility model has the advantages that the double-fed fan motor unit fault traversing protection circuit of the improvement that the utility model proposes can solve the problem that doubly fed induction generator out-of-control time under most of voltage failure; reduce its idle consumption problem; stabilisation systems rotating speed; significantly improve double-fed fan motor unit mapping, improve its fault ride-through capacity.
Accompanying drawing explanation
The detailed description made with reference to the following drawings by reading, other features, objects and advantages of the present utility model will become more apparent upon.
Fig. 1 is that circuit of the present utility model forms schematic diagram.
Fig. 2 is the particular make-up connection diagram of embodiment.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is described in detail.Following example will assist in those skilled in the art and are further appreciated by this utility model, but limit this utility model the most in any form.It should be pointed out that, to those skilled in the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement.These broadly fall into protection domain of the present utility model.
Embodiment:
The present embodiment is based on 2MW double-fed fan motor unit, its parameter is: rated capacity 2MW, rated voltage 690V, frequency 50Hz, stator resistance 0.00488p.u., stator leakage inductance 0.1386p.u., rotor resistance 0.00549p.u., rotor leakage inductance 0.1493p.u., mutual inductance 2.9p.u., inertia time constant 3.5s, turn-to-turn ratio 0.45, wherein reference capacity 2.2VA, reference voltage 563V, reference frequency 50Hz.
As depicted in figs. 1 and 2, the present embodiment includes: current-limiting circuit a, bypass circuit a, current-limiting circuit b, bypass circuit b, wherein, and current-limiting circuit a and a bypass circuit a are in parallel, and the circuit of this parallel relationship has three groups, its one end i.e. three-phase input end U1、V1、W1Connect doubly fed induction generator rotor three-phase winding in double-fed fan motor unit respectively, the other end i.e. three-phase output end U2、V2、W2Connect double-fed fan motor unit converter structure rotor side converter three-phase alternating current outfan；Another current-limiting circuit b has three groups, its can with triangle connect can also Y-connection, lead-out wire respectively by correspondence bypass circuit b meet above-mentioned three-phase input end U1、V1、W1。
Described current-limiting circuit a, it has three groups, and each group includes a current-limiting resistance, the respectively first resistance R1, the second resistance R2With the 3rd resistance R3, wherein, current-limiting resistance one end of each group is connected with one end of corresponding bypass circuit, and the other end is connected with the other end of corresponding bypass circuit.
In the present embodiment, the resistance of three current-limiting resistances in current-limiting circuit is 0.4228 ohm.
Described bypass circuit a, it has three groups, and each group includes bypass switch bidirectional thyristor, the respectively first bidirectional thyristor S1, the second bidirectional thyristor S2With the 3rd bidirectional thyristor S3, wherein, bidirectional thyristor one end of each group is connected with one end of corresponding current-limiting circuit, and the other end is connected with the other end of corresponding current-limiting circuit.
In the present embodiment, the rated voltage of three bidirectional thyristors in bypass circuit is all 2400V, and rated current is all 15kA.
Described current-limiting circuit b, it has three groups, and each group includes a current-limiting resistance, the respectively the 4th resistance R4, the 5th resistance R5With the 6th resistance R6, wherein, current-limiting resistance one end of each group is connected with one end of corresponding bypass circuit, and the other end of the other end and other current-limiting resistances connects together.
In the present embodiment, the resistance of three current-limiting resistances in current-limiting circuit is 0.8456 ohm.
Described bypass circuit b, it has three groups, and each group includes bypass switch bidirectional thyristor, the respectively the 4th bidirectional thyristor S4, the 5th bidirectional thyristor S5With the 6th bidirectional thyristor S6, wherein, bidirectional thyristor one end of each group is connected with one end of corresponding current limliting electricity group, the other end and above-mentioned corresponding three-phase input end U1、V1、W1It is connected.
In the present embodiment, the rated voltage of three bidirectional thyristors in bypass circuit is all 2400V, and rated current is all 15kA.
Described set-point 2 is more than set-point 1.
In the present embodiment, set-point 1 is 1.5p.u., and set-point 2 is 1.8p.u..
The work process of the present embodiment:
1. the first bidirectional thyristor S when double-fed fan motor unit is properly functioning, in the bypass circuit a in this utility model1Conducting, the second bidirectional thyristor S2Conducting and the 3rd bidirectional thyristor S3Conducting, the 4th bidirectional thyristor S in bypass circuit b4/ the five bidirectional thyristor S5With the 6th bidirectional thyristor S6It is in blocking state.Now, normal three-phase rotor current flows separately through the first bidirectional thyristor S in bypass circuit a1, the second bidirectional thyristor S2With the 3rd bidirectional thyristor S3With doubly fed induction generator rotor-side changer, and in current-limiting circuit a and current-limiting circuit b, no current flows through.
2., when double-fed fan motor unit suffers grid voltage sags, rotor windings produces overcurrent, the first bidirectional thyristor S when rotor fault electric current reaches set-point 1, in the bypass circuit a in this utility model1, the second bidirectional thyristor S2With the 3rd bidirectional thyristor S3Being turned off, rotor fault electric current flows through the first resistance R in current-limiting circuit a1, the second resistance R2With the 3rd resistance R3, double fed electric machine rotor side converter is still in duty, and rotor fault electric current is limited in set-point less than 1, but, invalid once current-limiting resistance, the 4th bidirectional thyristor S when rotor overcurrent reaches set-point 2, in the bypass circuit in this utility model4, the 5th bidirectional thyristor S5With the 6th the 5th bidirectional thyristor S6Conducting, now, the rotor fault electric current the 4th resistance R in current-limiting circuit b4, the 5th resistance R5With the 6th resistance R6, it is no longer flow through double fed electric machine rotor side converter, reaches to protect under extreme fault condition the purpose of double fed electric machine rotor side converter, thus assist double-fed fan motor unit successfully to pass through voltage failure.
Existing Crowbar resist technology; when double-fed fan motor unit suffers line voltage fault; when rotor fault electric current reaches set-point 1; just put into operation; rotor fault electric current is shorted; rotor-side changer is blocked, and doubly fed induction generator is in asynchronous operation state, absorbs the most idle and causes motor out of control.And this utility model is before rotor fault electric current is not up to set-point 2, motor is constantly in controllable state.This utility model is only when extreme fault, and when rotor fault electric current reaches set-point more than 2, motor is just in runaway condition, and during main purpose now, suppression rotor fault electric current is within safety limit.
Above specific embodiment of the utility model is described.It is to be appreciated that this utility model is not limited to above-mentioned particular implementation, those skilled in the art can make various deformation or amendment within the scope of the claims, and this has no effect on flesh and blood of the present utility model.
Claims (5)
1. the double-fed fan motor unit fault traversing protection circuit improved; it is characterized in that; including: current-limiting circuit a, bypass circuit a, current-limiting circuit b, bypass circuit b, wherein; one current-limiting circuit a and a bypass circuit a are in parallel; the circuit of this parallel relationship has three groups, its one end i.e. three-phase input end U1、V1、W1Connect doubly fed induction generator rotor three-phase winding in double-fed fan motor unit respectively, the other end i.e. three-phase output end U2、V2、W2Connect double-fed fan motor unit converter structure rotor side converter three-phase alternating current outfan；Another current-limiting circuit b has three groups, and it can connect can also connect by triangle with star row, and lead-out wire meets above-mentioned three-phase input end U by corresponding bypass circuit b respectively1、V1、W1；
Described bypass circuit a, is characterized in that under normal grid conditions, in the conduction state；When electric network fault, when doubly fed induction generator rotor current is more than set-point 1, it is in blocking state；
Described bypass circuit b, is characterized in that, under normal grid conditions, being in blocking state；When electric network fault, when doubly fed induction generator rotor current is more than set-point 2, in the conduction state；
Described bypass circuit a and bypass circuit b, it is characterised in that described set-point 2 is more than set-point 1.
The double-fed fan motor unit fault traversing protection circuit of a kind of improvement the most according to claim 1; it is characterized in that, described current-limiting circuit a includes current-limiting impedance, and it has three groups; one end of each group is connected with corresponding bypass circuit a one end, and the other end is connected with the corresponding bypass circuit a other end.
The double-fed fan motor unit fault traversing protection circuit of a kind of improvement the most according to claim 1; it is characterized in that, described bypass circuit a includes bypassing power switch, and it has three groups; one end of each group is connected with corresponding current-limiting circuit a one end, and the other end is connected with the corresponding current-limiting circuit a other end.
The double-fed fan motor unit fault traversing protection circuit of a kind of improvement the most according to claim 1; it is characterized in that; described current-limiting circuit b includes current-limiting impedance; it has three groups; it has two kinds of modes of connection; one be delta connection, another kind be star connection, lead-out wire meets above-mentioned three-phase input end U by corresponding bypass circuit b respectively1、V1、W1。
The double-fed fan motor unit fault traversing protection circuit of a kind of improvement the most according to claim 1, it is characterised in that described bypass circuit b includes bypassing power switch, and it has three groups, and one end meets three-phase input end U respectively1、V1、W1, the other end connects current-limiting circuit b respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620302191.1U CN205610233U (en) | 2016-04-05 | 2016-04-05 | Protection circuit is passed through to modified double -fed wind turbine generator system trouble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620302191.1U CN205610233U (en) | 2016-04-05 | 2016-04-05 | Protection circuit is passed through to modified double -fed wind turbine generator system trouble |
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| Publication Number | Publication Date |
|---|---|
| CN205610233U true CN205610233U (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620302191.1U Expired - Fee Related CN205610233U (en) | 2016-04-05 | 2016-04-05 | Protection circuit is passed through to modified double -fed wind turbine generator system trouble |
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| Country | Link |
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| CN (1) | CN205610233U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896595A (en) * | 2016-04-05 | 2016-08-24 | 山西大同大学 | Improved doubly-fed induction wind generator fault ride-through protection circuit |
| WO2022197287A1 (en) * | 2021-03-16 | 2022-09-22 | General Electric Company | An electrical generator and method of operating the same |
-
2016
- 2016-04-05 CN CN201620302191.1U patent/CN205610233U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896595A (en) * | 2016-04-05 | 2016-08-24 | 山西大同大学 | Improved doubly-fed induction wind generator fault ride-through protection circuit |
| CN105896595B (en) * | 2016-04-05 | 2018-05-22 | 山西大同大学 | A kind of improved double-fed fan motor unit fault traversing protection circuit |
| WO2022197287A1 (en) * | 2021-03-16 | 2022-09-22 | General Electric Company | An electrical generator and method of operating the same |
| CN115380456A (en) * | 2021-03-16 | 2022-11-22 | 通用电气公司 | Generator and method of operating the same |
| JP2023516215A (en) * | 2021-03-16 | 2023-04-18 | ゼネラル・エレクトリック・カンパニイ | generator and how to operate it |
| JP7430300B2 (en) | 2021-03-16 | 2024-02-13 | ゼネラル エレクトリック レノバブレス エスパーニャ， エセ．エレ． | Generator and how to operate it |
| US11984259B2 (en) | 2021-03-16 | 2024-05-14 | General Electric Renovables España, S.L. | Electrical generator and method of operating the same |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160928 Termination date: 20190405 |