CN202435016U - Quick protection circuit device for double-fed wind power generation system - Google Patents
Quick protection circuit device for double-fed wind power generation system Download PDFInfo
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- CN202435016U CN202435016U CN201120543582XU CN201120543582U CN202435016U CN 202435016 U CN202435016 U CN 202435016U CN 201120543582X U CN201120543582X U CN 201120543582XU CN 201120543582 U CN201120543582 U CN 201120543582U CN 202435016 U CN202435016 U CN 202435016U
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Abstract
The utility model discloses a quick protection circuit device for a double-fed wind power generation system. The quick protection circuit device comprises a short circuiter. The short circuiter is connected with the alternating-current side of a rotor-side current transformer of the wind power generation system. The quick protection circuit device additionally comprises a dynamic resistor which is serially connected onto the alternating-current side of the rotor-side current transformer and a switch which is connected with the dynamic resistor in parallel. The quick protection circuit device for the double-fed wind power generation system has the advantages that the problem of long cutoff time of common crowbar circuits is effectively solved and the fault coping capacity of a double-fed wind power generator set is fully exerted.
Description
Technical field
The utility model relates to technical field of wind power generation, particularly a kind of fast protection circuit device that is used for dual feedback wind power generation system.
Background technology
Insert the regulation that electric power network technique requires according to national grid about wind energy turbine set; Can keep a period of time of being incorporated into the power networks when requiring wind-powered electricity generation unit in the wind energy turbine set to have at the place of being incorporated into the power networks electric voltage dropping; And after the electric network fault excision; The wind-powered electricity generation unit can return to normal operating conditions rapidly, and promptly low-voltage is passed through (Low Voltage Ride-Through:LVRT) ability.Because the stator side of double-fed electricity generation system and electrical network coupling, so low voltage ride-through capability is with respect to other wind power system difficulty; The rotor-exciting frequency inverter capacity is littler than generator capacity; Part control to electricity generation system can only be provided; Thereby when the line voltage rapid drawdown, stator current increases, and the rotor-side electric current is owing to intercoupling between stator and rotor also can raise rapidly; This will cause the voltage of DC line link also can raise, and jeopardize the safety of the core component of wind-powered electricity generation unit and frequency converter.
As shown in Figure 1, form sketch map for existing double-fed fan motor generator system, it comprises axial fan hub 11, it provides support for its fan blade, is mechanical energy with wind energy transformation simultaneously; Gear box 12, its low velocity wind with input is quickened through mechanical driving device; Double-fed generator 13 is converted into electric energy with mechanical energy; Main transformer 14 is with the electric pressure rising of generator output, so that be connected to the grid; The electrical network 15 that is incorporated into the power networks absorbs the electric energy that the wind-powered electricity generation unit sends; Fault point 16, its place for relatively easily breaking down; Rotor-side converter 17, it is for connecting the frequency-converter device of direct current and rotor; Direct current capacitor 18, it is the device of DC side filtering and energy storage; Net side converter 19, it is for connecting the frequency-converter device of direct current and electrical network; The uncontrollable rectification circuit 21 of diode, it exchanges rotor-side in the device that is converted into direct current; Absorption resistance 22 absorbs the unnecessary electric current of rotor-side when it is used for fault; Switching device IGBT23 realizes the closed and disconnected of Crowbar circuit through control switch device IGBT23.
Therefore; Like above-mentioned description, the most general method is in the external rotor short-circuit device of rotor AC side of converter (Crowbar) bypass, when short trouble takes place at present; Rotor short-circuit device protective device is activated; The rotor-side converter locking so just reaches the electric current and the superpotential effect of rotor winding of restricted passage current transformer, keeps not off-grid operation of generator with this; Its circuit topological structure is to constitute uncontrollable rectification circuit 10 by 6 diodes, again at an IGBT device 12 of DC side serial connection and an absorption resistance 11 (as shown in Figure 1).Though this design can reach the effect of protection rotor current transformer,, consider if before electric network fault is removed excision Crowbar circuit earlier, may be when power system restoration because of converter once more the overcurrent short circuit protection that causes another move; , excises electric network fault the Crowbar circuit after removing fully again; Then because of rotor during by short circuit DFIG be similar to the squirrel-cage asynchronism generator that is incorporated into the power networks; The operation slippage is very big, will from electrical network, absorb a large amount of reactive powers and cause AC network to be difficult to recover normal rapidly.Therefore, how correctly selecting the mute time of Crowbar is the key issue of Crowbar technology.
In sum, how to design a kind of fast protection circuit device that is used for dual feedback wind power generation system, be those skilled in the art the direction place that will study.
Summary of the invention
The main purpose of the utility model provides a kind of fast protection circuit device that is used for dual feedback wind power generation system; It adopts the Crowbar circuit to add the system low-voltage ride-through capability of rotor-side series connection dynamic electric resistor when guaranteeing the electric network electric voltage drop that causes because of electric network fault, to solve the problem of Crowbar circuit on the mute time that diode rectification adds IGBT and absorption resistance.
In order to achieve the above object; The utility model provides a kind of fast protection circuit device that is used for dual feedback wind power generation system; It comprises a short-circuiting device; Described short-circuiting device connects the AC side of wind generator system rotor-side converter, also is included in the dynamic electric resistor and the switch parallelly connected with said dynamic electric resistor of the AC side serial connection of said rotor-side converter.
In the preferred implementation, described short-circuiting device comprises:
Uncontrollable rectification circuit; It comprises six diodes, and wherein, first diode is connected with second diode; The 3rd diode is connected with the 4th diode; The 5th diode is connected with the 6th diode, and the anode of said first utmost point pipe is connected with the anode of said the 3rd diode and the anode of said the 5th diode, and the negative terminal of said second diode is connected with the negative terminal of said the 4th diode and the negative terminal of said the 6th diode;
Absorption resistance, it has one first end and one second end, and said first end connects the anode of said first diode;
Transistor, it has emitter, base stage and collector electrode, and said transistorized emitter connects second end of said absorption resistance, and said transistorized collector electrode connects the negative terminal of said the 4th diode.
In the preferred implementation, the anode of the anode of described second diode, the 4th diode, the anode of the 6th diode connect the three-phase alternating current side of said rotor-side converter.
In the preferred implementation, described dynamic electric resistor is three, said switch of each said dynamic electric resistor parallel connection.
Compared with prior art; The beneficial effect of the utility model is: under the prerequisite of protection rotor-side converter and direct current capacitor; Efficiently solve the mute time problem of common Crowbar circuit, give full play to the ability of double-fed generator group reply fault, improved its low voltage ride-through capability; And only adopt resistance and switch element in the design circuit, simple in structure.
Description of drawings
Fig. 1 is that existing double-fed fan motor generator system is formed sketch map;
Fig. 2 is that the dual feedback wind power generation system that the utlity model has the fast protection circuit device is formed sketch map;
Fig. 3 is the utility model fast protection circuit device sketch map.
Embodiment
Below in conjunction with accompanying drawing, do more detailed explanation with other technical characterictic and advantage to the utility model is above-mentioned.
Consult Fig. 2, shown in 3, it is that the dual feedback wind power generation system that the utlity model has the fast protection circuit device is formed sketch map and fast protection circuit device sketch map.The utility model provides a kind of fast protection circuit device that is used for dual feedback wind power generation system; It comprises a short-circuiting device 20; Described short-circuiting device 20 connects the AC side of the rotor-side converter 17 of wind generator systems, and described fast protection circuit device also is included in the dynamic electric resistor 24 and the switch 25 parallelly connected with said dynamic electric resistor 24 of the AC side serial connection of said rotor-side converter 17.
Wherein, described short-circuiting device 20 comprises:
The anode of the anode of the anode of described second diode, the 4th diode, the 6th diode connects the three-phase alternating current side of said rotor-side converter
The fast protection circuit device that the utility model is used for dual feedback wind power generation system is to insert one group of dynamic electric resistor and switch in parallel loop respectively in said rotor-side converter 17 three-phase alternating current sides; Its switch has the interlock characteristic; During operate as normal, switch 25 closures are with rotor-side dynamic electric resistor 24 short circuits; When electrical network 15 in the fault point 16 when breaking down; Switch 25 is opened; Dynamic electric resistor 24 is worked with short-circuiting device 20 circuit simultaneously, but at all after dates of first fault current transistor 23 signals is broken off, excision short-circuiting device 20 circuit; 24 of dynamic electric resistors work on until trouble shooting, when generator normally moves again by switch 25 closed short circuits.
In sum; Under the prerequisite of protection rotor-side converter and direct current capacitor; Efficiently solve the mute time problem of common Crowbar circuit, give full play to the ability of double-fed generator group reply fault, improved its low voltage ride-through capability; And only adopt resistance and switch element in the design circuit, simple in structure.
More than explanation is just illustrative as far as the utility model; And nonrestrictive, those of ordinary skills understand, under the situation of spirit that does not break away from following accompanying claims and limited and scope; Can make many modifications; Change, or equivalence, but all will fall in the protection range of the utility model.
Claims (4)
1. fast protection circuit device that is used for dual feedback wind power generation system; It comprises a short-circuiting device; Described short-circuiting device connects the AC side of wind generator system rotor-side converter; It is characterized in that, also be included in the dynamic electric resistor and the switch parallelly connected of the AC side serial connection of said rotor-side converter with said dynamic electric resistor.
2. the fast protection circuit device that is used for dual feedback wind power generation system according to claim 1, it is characterized in that: described short-circuiting device comprises:
Uncontrollable rectification circuit; It comprises six diodes, and wherein, first diode is connected with second diode; The 3rd diode is connected with the 4th diode; The 5th diode is connected with the 6th diode, and the anode of said first utmost point pipe is connected with the anode of said the 3rd diode and the anode of said the 5th diode, and the negative terminal of said second diode is connected with the negative terminal of said the 4th diode and the negative terminal of said the 6th diode;
Absorption resistance, it has one first end and one second end, and said first end connects the anode of said first diode;
Transistor, it has emitter, base stage and collector electrode, and said transistorized emitter connects second end of said absorption resistance, and said transistorized collector electrode connects the negative terminal of said the 4th diode.
3. the fast protection circuit device that is used for dual feedback wind power generation system according to claim 2; It is characterized in that the anode of the anode of described second diode, the 4th diode, the anode of the 6th diode connect the three-phase alternating current side of said rotor-side converter.
4. the fast protection circuit device that is used for dual feedback wind power generation system according to claim 3 is characterized in that described dynamic electric resistor is three, said switch of each said dynamic electric resistor parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120543582XU CN202435016U (en) | 2011-12-22 | 2011-12-22 | Quick protection circuit device for double-fed wind power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120543582XU CN202435016U (en) | 2011-12-22 | 2011-12-22 | Quick protection circuit device for double-fed wind power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202435016U true CN202435016U (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120543582XU Expired - Lifetime CN202435016U (en) | 2011-12-22 | 2011-12-22 | Quick protection circuit device for double-fed wind power generation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202435016U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356501A (en) * | 2015-10-26 | 2016-02-24 | 山西大同大学 | Novel doubly-fed wind power generator set fault ride-through protection circuit |
| CN107591789A (en) * | 2017-10-20 | 2018-01-16 | 陕西航空电气有限责任公司 | A kind of three phase variable frequency alternating current power-generating system over-voltage suppression device |
| CN108471140A (en) * | 2018-04-26 | 2018-08-31 | 广东电网有限责任公司 | Double-fed wind turbine low voltage traversing control method and device |
-
2011
- 2011-12-22 CN CN201120543582XU patent/CN202435016U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356501A (en) * | 2015-10-26 | 2016-02-24 | 山西大同大学 | Novel doubly-fed wind power generator set fault ride-through protection circuit |
| CN105356501B (en) * | 2015-10-26 | 2018-07-10 | 山西大同大学 | A kind of novel double-fed fan motor unit fault traversing protection circuit |
| CN107591789A (en) * | 2017-10-20 | 2018-01-16 | 陕西航空电气有限责任公司 | A kind of three phase variable frequency alternating current power-generating system over-voltage suppression device |
| CN108471140A (en) * | 2018-04-26 | 2018-08-31 | 广东电网有限责任公司 | Double-fed wind turbine low voltage traversing control method and device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |