CN206195335U - Protection device of external double -fed converter - Google Patents
Protection device of external double -fed converter Download PDFInfo
- Publication number
- CN206195335U CN206195335U CN201621244330.6U CN201621244330U CN206195335U CN 206195335 U CN206195335 U CN 206195335U CN 201621244330 U CN201621244330 U CN 201621244330U CN 206195335 U CN206195335 U CN 206195335U
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- Prior art keywords
- double
- negative pole
- diode
- current transformer
- igbt2
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- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- Protection Of Generators And Motors (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The utility model relates to a protection device, a protection device of external double -fed converter, including three phase bridge D1, diode D2, controllable device IGBT1, IGBT2, the female row of double -fed converter direct current and drain resistor R, three phase bridge D1 passes through A respectively, B, the C three -phase power line is connected with double -fed generator rotor, three phase bridge D1's anodal and the anodal of diode D2 are connected, diode D2's negative pole and controllable device IGBT1's one end are connected, IGBT1's the other end and drain resistor R's one end are connected, drain resistor R's the other end is connected with three phase bridge D1's negative pole, controllable device IGBT2's one end and female arrange anodal of double -fed converter direct current are connected, IGBT2's the other end and diode D2's negative pole are connected, the female negative pole of arranging of double -fed converter direct current is connected with three phase bridge D1's negative pole. The utility model discloses a less controllable power device, greatly reduced the cost, be the overcurrent and the overvoltage protection of an effectual double -fed converter, ensured the reliability service of double -fed converter.
Description
Technical field
The utility model is related to a kind of protection device, more specifically to a kind of protection of external double-feed current transformer
Device.
Background technology
It is one current transformer of connection between generator amature and power network as double-fed wind power generator, by changing generator
The frequency of the exciting current in rotor so that sent on double-fed aerogenerator stator and line voltage, frequency identical electricity
Power, is input to power network.But it is not enough that this current transformer is primarily present following three points：One be current transformer blower fan to the fluctuation ratio of power network compared with
Sensitivity, when fluctuating occurs in line voltage, easily trip off-grid；Two are, compared with the straight full power convertor for driving, this unsteady flow
Device capacity is smaller, limited in one's ability to generator protection；Three are, current transformer power device (IGBT) resistance overvoltage and overcurrent capability
It is limited, cause irrecoverability to damage more.
The content of the invention
In order to overcome the deficiencies in the prior art, the utility model purpose to be to provide a kind of external double-feed current transformer
Protection device.The utility model greatly reduces cost as a result of less controlled power device, is a kind of effective
The overcurrent and overvoltage protection of double-feed current transformer, to realize that current transformer reliability service provides strong guarantee；The guarantor
Protection unit strong adaptability, can be applied on the unit of different voltage class and capacity by selecting suitable power device grade
Face.
In order to realize foregoing invention purpose, solve the problems of in the prior art, the technology that the utility model is taken
Scheme is：A kind of protection device of external double-feed current transformer, including three-phase commutation bridge D1, diode D2, controllable devices
IGBT1, IGBT2, double-feed current transformer DC master row and bleeder resistance R, the three-phase commutation bridge D1 pass through A, B, C three-phase electricity respectively
The line of force is connected with doubly-fed generation machine rotor, and the positive pole of the three-phase commutation bridge D1 is connected with the positive pole of diode D2, two pole
The negative pole of pipe D2 is connected with one end of controllable devices IGBT1, the other end of the controllable devices IGBT1 and the one of bleeder resistance R
End connection, the other end of the bleeder resistance R is connected with the negative pole of three-phase commutation bridge D1, one end of the controllable devices IGBT2
Positive pole with double-feed current transformer DC master row is connected, and the other end of the controllable devices IGBT2 is connected with the negative pole of diode D2,
The negative pole of the double-feed current transformer DC master row is connected with the negative pole of three-phase commutation bridge D1.
The utility model beneficial effect is：A kind of protection device of external double-feed current transformer, including three-phase commutation bridge D1,
Diode D2, controllable devices IGBT1, IGBT2, double-feed current transformer DC master row and bleeder resistance R, the three-phase commutation bridge D1 point
Not Tong Guo A, B, C three-phase power line be connected with doubly-fed generation machine rotor, the positive pole of the three-phase commutation bridge D1 is with diode D2's
Positive pole is connected, and the negative pole of the diode D2 is connected with one end of controllable devices IGBT1, and the controllable devices IGBT1's is another
End be connected with one end of bleeder resistance R, the other end of the bleeder resistance R is connected with the negative pole of three-phase commutation bridge D1, it is described can
One end of control device IGBT2 is connected with the positive pole of double-feed current transformer DC master row, the other end and two of the controllable devices IGBT2
The negative pole connection of pole pipe D2, the negative pole of the double-feed current transformer DC master row is connected with the negative pole of three-phase commutation bridge D1.With it is existing
Technology is compared, and the utility model employs less controlled power device, greatly reduces cost, is that a kind of effective double-fed becomes
The overcurrent and overvoltage protection of device are flowed, to realize that current transformer reliability service provides strong guarantee；The protection device
Strong adaptability, can be applied on the unit of different voltage class and capacity by selecting suitable power device grade.
Brief description of the drawings
Fig. 1 is the utility model structured flowchart.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of protection device of external double-feed current transformer, including three-phase commutation bridge D1, diode D2, can
Control device IGBT1, IGBT2, double-feed current transformer DC master row and bleeder resistance R, the three-phase commutation bridge D1 pass through A, B, C respectively
Three-phase power line is connected with doubly-fed generation machine rotor, is DC current by the alternating current and photovoltaic conversion of doubly-fed generation machine rotor
And voltage；The positive pole of the three-phase commutation bridge D1 is connected with the positive pole of diode D2, further strengthens the unidirectional of bleed-off circuit and leads
Logical ability；The negative pole of the diode D2 is connected with one end of controllable devices IGBT1, the other end of the controllable devices IGBT1
One end with bleeder resistance R is connected, and the other end of the bleeder resistance R is connected with the negative pole of three-phase commutation bridge D1, constitutes controllable
Energy bleed-off circuit；One end of the controllable devices IGBT2 is connected with the positive pole of double-feed current transformer DC master row, described controllable
The other end of device IGBT2 is connected with the negative pole of diode D2, the negative pole and three phase rectifier of the double-feed current transformer DC master row
Bridge D1 negative pole connection, for there is overvoltage in double-feed current transformer DC master row in the case of realize that energy is released.It is specific to protect
Shield process is as follows：When overcurrent occurs in double-fed generator rotor three-phase electric current, by the effect of three-phase commutation bridge, be converted to straight
Flow, is then released by bleeder resistance；When overvoltage occurs in double-feed current transformer DC master row, DC quantity is converted to, so
Released by bleeder resistance afterwards, so as to ensure that double-feed current transformer not because overcurrent and overvoltage and caused by damage.
Claims (1)
1. a kind of protection device of external double-feed current transformer, including three-phase commutation bridge D1, diode D2, controllable devices IGBT1,
IGBT2, double-feed current transformer DC master row and bleeder resistance R, it is characterised in that：The three-phase commutation bridge D1 passes through A, B, C respectively
Three-phase power line is connected with doubly-fed generation machine rotor, and the positive pole of the three-phase commutation bridge D1 is connected with the positive pole of diode D2, institute
The negative pole for stating diode D2 is connected with one end of controllable devices IGBT1, the other end and bleeder resistance of the controllable devices IGBT1
One end connection of R, the other end of the bleeder resistance R is connected with the negative pole of three-phase commutation bridge D1, the controllable devices IGBT2's
One end is connected with the positive pole of double-feed current transformer DC master row, the other end of the controllable devices IGBT2 and the negative pole of diode D2
Connection, the negative pole of the double-feed current transformer DC master row is connected with the negative pole of three-phase commutation bridge D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621244330.6U CN206195335U (en) | 2016-11-21 | 2016-11-21 | Protection device of external double -fed converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621244330.6U CN206195335U (en) | 2016-11-21 | 2016-11-21 | Protection device of external double -fed converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206195335U true CN206195335U (en) | 2017-05-24 |
Family
ID=58727155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621244330.6U Expired - Fee Related CN206195335U (en) | 2016-11-21 | 2016-11-21 | Protection device of external double -fed converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206195335U (en) |
-
2016
- 2016-11-21 CN CN201621244330.6U patent/CN206195335U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170524 |