CN108023470A - A kind of doubly-fed generation system protects circuit with Crowbar - Google Patents
A kind of doubly-fed generation system protects circuit with Crowbar Download PDFInfo
- Publication number
- CN108023470A CN108023470A CN201711482583.6A CN201711482583A CN108023470A CN 108023470 A CN108023470 A CN 108023470A CN 201711482583 A CN201711482583 A CN 201711482583A CN 108023470 A CN108023470 A CN 108023470A
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- Prior art keywords
- crowbar
- igbt
- resistance
- bridge
- arm type
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- 238000004804 winding Methods 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 8
- 239000010409 thin film Substances 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 7
- 230000004224 protection Effects 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
-
- H02J3/386—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
- H02M1/348—Passive dissipative snubbers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention provides a kind of doubly-fed generation system Crowbar to protect circuit, including three-phase commutation bridge, half-bridge arm type IGBT, Crowbar resistance, resistance R1 and capacitance C4, the exchange side connection generator amature winding of the three-phase commutation bridge, DC side anode connection Crowbar resistance one end, the negative terminal of negative terminal connection half-bridge arm type IGBT, the Crowbar resistance other end is connected with the AC ends of half-bridge arm type IGBT, described resistance R1 one end is connected with three phase rectifying bridge DC side anode, anode of the other end respectively with capacitance C4 one end and half-bridge arm type IGBT is connected, the capacitance C4 other ends are connected with three phase rectifying bridge DC side negative terminal.Beneficial effect of the present invention：Can ensure that half-bridge arm type IGBT is not subject to high voltage, effectively to rotor side carry out Crowbar protections, and it is simple in structure, cost is low, reliability is high.
Description
Technical field
The invention belongs to doubly-fed generation circuit system topologies field, is used more particularly, to a kind of doubly-fed generation system
Crowbar protects circuit.
Background technology
Since the stator side of doubly-fed wind turbine is typically directly articulated on power grid, cause in electric network fault
When generator stator voltage can falling or raise and fall or raise with network voltage, can so cause double-fed induction electric
The stator magnetic linkage of machine changes with the change of stator voltage, but stator magnetic linkage is a continuous the moment of inertia, therefore in power grid
Break down the moment, voltage can be mutated, but magnetic linkage cannot be mutated, so that stator magnetic linkage one transient state of appearance is straight
Flow component, this DC component can cause rotor-side high pressure, high current occur, so if without rotor inverter protection
Words, can cause rotor side inverter IGBT overcurrent and overvoltage damage device occur.So need in rotor-side increase
Crowbar is as protection.
And in existing way, one kind is as switching tube, since thyristor is half using three-phase commutation bridge with thyristor
Control type switching device, it is impossible to which belt current turns off, so that Crowbar, once triggering, rotor sustained short-circuit state, unit must
It must shut down, cannot so meet the needs of double-fed unit through fault；
Way is that thyristor is replaced three-phase commutation bridge in second, realizes rotor short-circuit, and alternating current is utilized in this scheme
Zero crossing in road realizes the shut-off of Crowbar, but since rotor current frequency is relatively low, Crowbar shut-off opportunitys have
It is uncertain；
The third way is to replace thyristor in method two using the IGBT with anti-paralleled diode, in this respect effective solution
The certainly deficiency in above two method, and disclosure satisfy that the demand of double-fed unit fault traversing, but due to needing to use six
IGBT could complete three-phase shortcircuit and open and short circuit and shut-off, and IGBT is more, and cost is higher；
4th kind of method is formed using three-phase diode rectifier bridge and IGBT, and IGBT is as switching tube, due to using complete
Control type device IGBT can be good at solving the problems, such as that thyristor cannot turn off, simultaneously because employing single as switching tube
IGBT, cost substantially reduce.But since Crowbar needs to be connected directly between on rotor windings, when IGBT is turned off in high current
When, rotor leakage inductance and the lead inductance being connected with rotor produce reverse spike voltage and cause IGBT excessive pressure damages enough, so existing
It is to carry out the absorption of energy using a RC circuit to have method, but since the addition of resistance causes IGBT terminal voltages still very
Height, when can cause the IGBT to open in the case that resistance is too small, IGBT electric currents are too big so that IGBT may be damaged.
It can be seen from the above that there are shortcoming in several existing ways above.
The content of the invention
In view of this, the present invention is directed to propose a kind of doubly-fed generation system protects circuit with Crowbar, to solve above-mentioned ask
The shortcoming of topic.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of doubly-fed generation system protects circuit, including three-phase commutation bridge, half-bridge arm type IGBT, Crowbar with Crowbar
Resistance, resistance R1 and capacitance C4, the exchange side connection generator amature winding of the three-phase commutation bridge, DC side anode are connected to
One end of Crowbar resistance, negative terminal are connected to the negative terminal of half-bridge arm type IGBT, the other end and half-bridge of the Crowbar resistance
The AC ends connection of arm type IGBT, the DC side anode of described resistance R1 one end and three-phase commutation bridge connect, other end respectively with
One end of capacitance C4 is connected with the anode of half-bridge arm type IGBT, and the DC side of the capacitance C4 other ends and three-phase commutation bridge is born
End connection.
Further, the half-bridge arm type IGBT includes the upper tube IGBT and down tube IGBT of series connection, the upper tube IGBT's
Collector is connected to one end that resistance R1 is connected with capacitance C4, and the emitter of the down tube IGBT is connected to three-phase commutation bridge
Negative terminal.
Further, the upper tube IGBT is off state, and the down tube IGBT is on off state.
Further, the half-bridge arm type IGBT includes the fast recovery diode and down tube IGBT of series connection, the fast recovery
The cathode of diode is connected to one end that resistance R1 is connected with capacitance C4, and it is whole that the emitter of the down tube IGBT is connected to three-phase
Flow the negative terminal of bridge.
Further, the resistance R1 is power-type resistance.
Further, the capacitance C4 is low inductance thin-film capacitor.
Relative to the prior art, a kind of doubly-fed generation system of the present invention Crowbar protection circuits have following
Advantage：
Doubly-fed generation system of the present invention is with Crowbar protection circuits when the down tube IGBT of half-bridge arm type IGBT is quick
During shut-off, big reverse di/dt can occur due to inductive current on rotor windings, this di/dt can produce high voltage on inductance,
This high voltage can be by the less Crowbar resistance of resistance value, by two poles of the upper tube IGBT directions parallel connection of half-bridge arm type IGBT
Pipe flows to low inductance thin-film capacitor C4, and flowing through power-type resistance R1 without high current produces high-tension situation, so
It ensure that half-bridge arm type IGBT is not subject to high voltage；Effectively to rotor side carry out Crowbar protections, and it is simple in structure,
Cost is low, reliability is high.
Brief description of the drawings
The attached drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its explanation is used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 protects circuit diagram for doubly-fed generation system of the present invention Crowbar；
Fig. 2 is the circuit structure diagram of half-bridge arm type IGBT of the present invention；
Fig. 3 is that the doubly-fed generation system described in the embodiment of the present invention protects circuit structure diagram with Crowbar；
Fig. 4 is the circuit structure diagram of the half-bridge arm type IGBT described in another embodiment of the present invention.
Embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Below with reference to the accompanying drawings and the present invention will be described in detail in conjunction with the embodiments.
As shown in Figure 1, a kind of doubly-fed generation system protects circuit, including three-phase commutation bridge, half-bridge arm type with Crowbar
IGBT, Crowbar resistance, resistance R1 and capacitance C4, the exchange side connection generator amature winding of the three-phase commutation bridge, direct current
Side anode is connected to one end of Crowbar resistance, and negative terminal is connected to the negative terminal of half-bridge arm type IGBT, the Crowbar resistance
The other end is connected with the AC ends of half-bridge arm type IGBT, the DC side anode connection of described resistance R1 one end and three-phase commutation bridge, separately
Outer one end is connected with one end of capacitance C4 and the anode of half-bridge arm type IGBT respectively, the capacitance C4 other ends and three phase rectifier
The positive DC side end connection of bridge.
As shown in figure 3, the half-bridge arm type IGBT includes the upper tube IGBT and down tube IGBT of series connection, the upper tube IGBT's
Collector is connected to one end that resistance R1 is connected with capacitance C4, and the emitter of the down tube IGBT is connected to three-phase commutation bridge
Negative terminal, as shown in Fig. 2, the circuit structure diagram for half-bridge arm type IGBT.
The upper tube IGBT is off state, and the down tube IGBT is on off state.
As shown in figure 4, the half-bridge arm type IGBT includes the fast recovery diode and down tube IGBT of series connection, the fast recovery
The cathode of diode is connected to one end that resistance R1 is connected with capacitance C4, and it is whole that the emitter of the down tube IGBT is connected to three-phase
Flow the negative terminal of bridge.
The resistance R1 is power-type resistance.
The capacitance C4 is low inductance thin-film capacitor.
The three-phase commutation bridge is made of three half-bridge arm type diodes D1, D2, D3, and three-phase commutation bridge is by generator amature
The AC conversion that winding is sent is constantly in off state, down tube IGBT into direct current, the upper tube IGBT of half-bridge arm type IGBT
As switch, when Crowbar is triggered, down tube IGBT conductings so that the positive and negative terminal of three-phase commutation bridge is short by Crowbar resistance
Pick up and, so that the energy that generator amature transmits is consumed, simultaneously because power-type resistance R1 and low inductance thin-film capacitor
The positive and negative terminal of three-phase commutation bridge is attempted by after C4 series connection, so also can be by low inductance during Crowbar resistance short circuit direct current positive and negative terminals
The electric energy stored in thin-film capacitor C4 discharges, and the upper tube IGBT of half-bridge arm type IGBT is constantly in off state, with this
The diode of IGBT parallel connections in reverse blocking state, so low inductance thin-film capacitor C4 be by power-type resistance R1 and
Crowbar conductive discharges, since Crowbar resistance is typically chosen in minimum numerical value, so power-type resistance R1 rises mainly
Metering function.When the down tube IGBT of half-bridge arm type IGBT is rapidly switched off, can occur big due to inductive current on rotor windings
Reverse di/dt, this di/dt can produce high voltage on inductance, this high voltage can be passed through by the less Crowbar resistance of resistance value
The diode of the upper tube IGBT directions parallel connection of more than half bridge arm type IGBT flows to low inductance thin-film capacitor C4, without high current
Flow through power-type resistance R1 and produce high-tension situation.This ensure that half-bridge arm type IGBT is not subject to high voltage.
In another embodiment, as shown in figure 4, since the upper tube IGBT of half-bridge arm type IGBT is constantly in off state, institute
That can remove, the upper tube IGBT of half-bridge arm type IGBT is removed, only retains fast recovery diode.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.
Claims (6)
1. a kind of doubly-fed generation system protects circuit with Crowbar, it is characterised in that：Including three-phase commutation bridge, half-bridge arm type
IGBT, Crowbar resistance, resistance R1 and capacitance C4, the exchange side connection generator amature winding of the three-phase commutation bridge, direct current
Side anode is connected to one end of Crowbar resistance, and negative terminal is connected to the negative terminal of half-bridge arm type IGBT, the Crowbar resistance
The other end is connected with the AC ends of half-bridge arm type IGBT, the DC side anode connection of described resistance R1 one end and three-phase commutation bridge, separately
Outer one end is connected with one end of capacitance C4 and the anode of half-bridge arm type IGBT respectively, the capacitance C4 other ends and three phase rectifier
The positive DC side end connection of bridge.
2. a kind of doubly-fed generation system according to claim 1 protects circuit with Crowbar, it is characterised in that：Described half
Bridge arm type IGBT includes the upper tube IGBT of series connection and down tube IGBT, the collector of the upper tube IGBT are connected to resistance R1 and capacitance
One end that C4 is connected, the emitter of the down tube IGBT are connected to the negative terminal of three-phase commutation bridge.
3. a kind of doubly-fed generation system according to claim 2 protects circuit with Crowbar, it is characterised in that：On described
Pipe IGBT is off state, and the down tube IGBT is on off state.
4. a kind of doubly-fed generation system according to claim 1 protects circuit with Crowbar, it is characterised in that：Described half
Bridge arm type IGBT includes the fast recovery diode and down tube IGBT of series connection, and the cathode of the fast recovery diode is connected to resistance R1
The one end being connected with capacitance C4, the emitter of the down tube IGBT are connected to the negative terminal of three-phase commutation bridge.
5. protecting circuit according to any a kind of doubly-fed generation system Crowbar in claim 1,2,4, its feature exists
In：The resistance R1 is power-type resistance.
6. protecting circuit according to any a kind of doubly-fed generation system Crowbar in claim 1,2,4, its feature exists
In：The capacitance C4 is low inductance thin-film capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482583.6A CN108023470B (en) | 2017-12-29 | 2017-12-29 | Crowbar protection circuit for double-fed power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482583.6A CN108023470B (en) | 2017-12-29 | 2017-12-29 | Crowbar protection circuit for double-fed power generation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108023470A true CN108023470A (en) | 2018-05-11 |
| CN108023470B CN108023470B (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711482583.6A Active CN108023470B (en) | 2017-12-29 | 2017-12-29 | Crowbar protection circuit for double-fed power generation system |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324755A (en) * | 2011-10-11 | 2012-01-18 | 中国矿业大学 | Low-voltage ride through control method and device for doubly-fed wind power generating system |
| CN203675025U (en) * | 2014-01-13 | 2014-06-25 | 天津大学 | Wind generation set crowbar protection circuit |
| CN105186559A (en) * | 2015-08-31 | 2015-12-23 | 国家电网公司 | Low-voltage ride-through circuit of doubly-fed wind generator set and control method for low-voltage ride-through circuit |
| CN205070452U (en) * | 2015-07-13 | 2016-03-02 | 国家电网公司 | Double -fed type wind turbine generator system high voltage system of passing through |
| CN207853750U (en) * | 2017-12-29 | 2018-09-11 | 天津瑞能电气有限公司 | A kind of doubly-fed generation system Crowbar protection circuits |
-
2017
- 2017-12-29 CN CN201711482583.6A patent/CN108023470B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324755A (en) * | 2011-10-11 | 2012-01-18 | 中国矿业大学 | Low-voltage ride through control method and device for doubly-fed wind power generating system |
| CN203675025U (en) * | 2014-01-13 | 2014-06-25 | 天津大学 | Wind generation set crowbar protection circuit |
| CN205070452U (en) * | 2015-07-13 | 2016-03-02 | 国家电网公司 | Double -fed type wind turbine generator system high voltage system of passing through |
| CN105186559A (en) * | 2015-08-31 | 2015-12-23 | 国家电网公司 | Low-voltage ride-through circuit of doubly-fed wind generator set and control method for low-voltage ride-through circuit |
| CN207853750U (en) * | 2017-12-29 | 2018-09-11 | 天津瑞能电气有限公司 | A kind of doubly-fed generation system Crowbar protection circuits |
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| Publication number | Publication date |
|---|---|
| CN108023470B (en) | 2020-11-10 |
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Effective date of registration: 20230714 Address after: No. 100, Hangtian Road, Tianjin Pilot Free Trade Zone (Airport Economic Zone), Binhai, Tianjin 300450 Patentee after: TIANJIN RUIYUAN ELECTRICAL Co.,Ltd. Address before: No.1 Xinghua No.7 Branch Road, economic development zone, Xiqing District, Tianjin Patentee before: Tianjin Ruineng electric Co.,LTD. |
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