CN201590758U - Protective device for power electronic module - Google Patents
Protective device for power electronic module Download PDFInfo
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- CN201590758U CN201590758U CN2009201780113U CN200920178011U CN201590758U CN 201590758 U CN201590758 U CN 201590758U CN 2009201780113 U CN2009201780113 U CN 2009201780113U CN 200920178011 U CN200920178011 U CN 200920178011U CN 201590758 U CN201590758 U CN 201590758U
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- control device
- power electronic
- protection
- electric power
- electronic module
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Abstract
The utility model discloses a protective device used for a power electronic module, and belongs to the field of power electronics. The utility model particularly relates to a protective device used for a power electronic system and a power electronic system. A protective device used for a power electronic module is provided according to the example embodiment of the utility model. The protective device comprises a plurality of protective devices and a plurality of control devices; and each protective device can be connected with at least two control devices, and each control device can be connected with at least another control device.
Description
Technical field
The utility model relates to field of power electronics.Be particularly related to the protective device (protection arrangement) and the power electronic system (power electronic system) that are used for electric power electronic module.
Background technology
The large-scale power electronic system typically comprises numerous control devices of carrying out different control functions, and described controlled function for example shows and entering apparatus as measurement, analog-digital conversion, signal filtering, set point (setpoint) processing, control algolithm, pulse width modulator, input and output, circuit protection, self-monitoring, power supply apparatus, the data of electric weight.Because the large-scale power electronic system can reach significant size, so the distance between the control device can reach tens of rice.
Communication between the dedicated devices may have to be established, and is most devices supply electric power again.In addition, power line usually is in the rugged environment with communicating by letter in the power electronic system, therefore is vulnerable to the attack of electromagnetic interference.
The utility model content
The purpose of this utility model provides a kind of protective device, and it can protect electric power electronic module and handling safety.This purpose by foundation claim 1 protective device and reach according to the power electronic system of claim 15.According to the independent claims additional embodiments is obvious.
According to example embodiment of the present utility model, can provide a kind of protective device that is used for electric power electronic module.This protective device can comprise a plurality of protection devices and a plurality of control device.Each protection device can be connected with at least two control devices, and each control device can be connected with another controller at least.
This protective device can comprise the safety operation that can guarantee protective device and therefore occur can guaranteeing under the wrong situation structure to the reliably protecting of electric power electronic module during operation.This protective device can comprise with the connection like circulus.This protective device can be used for the modularization power electronic system.
Electric power electronic module or electric power electronic module device can comprise at least one semiconductor or a plurality of semiconductor, for example three-phase MOSFET bridge.Electric power electronic module can be an electric power converter, for example AC-DC transducer or DC-AC transducer.It is about 2 that electric power converter can be used for, and 5KVA (kilovolt-ampere) is to the about electric power of 500MVA (megavolt-ampere).Semiconductor in such electric power converter can be used for the electric current and the voltage that is higher than about 100V (volt) of about 10A until about 100KA (kiloampere).The demarcation that control device is operable in the extremely about 220V scope of about 5V is supplied under the voltage.Electric power electronic module can be used as power supply apparatus, for example powers to the vehicle such as train.In addition, electric power electronic module for example can be used for electric power to be produced or changes, and for example electricity drives or the wind energy converter of industrial machine as being used for.
Can comprise first protection device, the most last protection device, first control device and the most last control device according to example embodiment protective device of the present utility model, wherein the most last protection device can be connected with first control device and the most last control device can be connected with first control device.
The term " first " relevant with protection device and control device and " the most last " can be determined first device and the most last device in the functional chain of device, for example end of device chain in the functional chain of device respectively.
On function, can be assigned to this first electric power electronic module according to example embodiment first protection device of the present utility model can being assigned to first electric power electronic module and first control device on the function.
In such structure, local control can be utilized, and described local control is distributed to electric power electronic module respectively.One and the electric power electronic module that may command is distributed under situation about breaking down in the electric power electronic module that each local control may command is distributed.
Can be assigned to second electric power electronic module on the function and second control device can be assigned to second electric power electronic module on function according to example embodiment second protection device of the present utility model.
In such structure, can utilize other decentralized control, wherein first control device and second control device can provide each other communicate by letter the communication from first control device to second control device at least.
Can be connected to first control device and first protection device by first according to example embodiment first protection device of the present utility model and can be connected to second control device by second connection.In addition, second protection device can be connected to second control device and second protection device can be connected to first control device by the 4th by the 3rd.
The structure that has four devices like this, promptly two protection devices and two control devices can be provided for the compactness and the economizing type protective device of two modularization electric power electronic modules.
Can be connected to second control device and second control device can be connected to first control device by the 6th by the 5th according to example embodiment first control device of the present utility model.
In such structure, can connect send to second control device and connect by first from the signal of first control device and turn back to first control device from second control device by second from first control device.Because these two control devices can be connected to a protection device respectively, so at least one control device can be initialized to one switching signal in the electric power electronic module under detecting the situation of fault.
According to example embodiment of the present utility model, can be connected to each other at ring inner control device.
Ring is the structure that can guarantee to save the signal transmission, and this is that the feedback from the most last device to first device connects in this ring because ring can be provided in.
According at least one connection of example embodiment of the present utility model can be that optical fiber connects.
Optical fiber is unusual robust to electromagnetic effect in the environment of protective device.Optical fiber connects the other interference that can avoid signal, produces under its situation that may break down at the device of next-door neighbour's protective device.In addition, optical fiber can be used in the adverse circumstances and is not subjected to the adverse circumstances factor affecting, all like dusts of described factor, humidity and electromagnetic field with the function of protecting protective device.
According at least one protection device of example embodiment of the present utility model can be the fast circuit detection means.
Short-circuit detecting device or FSCD can detect by semi-conductive igniting in the electric power electronic module or door are triggered caused short circuit fast.Detection can be risen based on the electric current of foundation di/dt (unitary current of unit interval changes) or electric current descends is measured.The short-circuit detecting device can utilize the light pulse of certain duration fast.Duration according to the predetermined value light pulse can be indicated short circuit, if for example the duration of light pulse more than 15 μ s.
According at least one protection device of example embodiment of the present utility model can be over-current protection device.
Can utilize over-current protection device to avoid overcurrent at the electric power electronic module place that will protect.Overcurrent can be determined by predetermined value.Over-current protection device can detect the overcurrent at the electric power electronic module place that will protect.Overcurrent may cause infringement to such semiconductor: do not take the other cut-out or the semiconductor of safeguard measure.Therefore, overcurrent protection can be cut off semiconductor or electric power electronic module.Perhaps also possible is to fetch the shunting overcurrent by being provided to being electrically connected of other electric devices.
According at least one protection device of example embodiment of the present utility model can be over-current protection device.
Overvoltage protecting device can be monitored the DC link voltage.Arrive at the DC link voltage under the situation of predetermined value, the pulse of corresponding semiconductor can be stopped, and this may also be referred to as pulse and removes.After the DC link voltage reduces and may arrive predetermined value, can restart semi-conductive pulse, and semiconductor can be as operation in the past, meaning is promptly before overvoltage takes place.Therefore, the semi-conductive transducer that comprises electric power electronic module is operated under superpotential situation and can be interrupted.
Can be suitable for receiving the light pulse of various durations according at least one control device of example embodiment of the present utility model.
Light pulse can be used as the detection signal of electric power electronic module operating period fault.The duration of similar pulse can be represented the state of electric power electronic module, and described electric power electronic module may not have any failed operation and has failed operation yet.For example may continue to be interpreted as the short circuit current at corresponding semiconductor place more than the light pulse of 15 μ s.After detecting such light pulse, for example can initiate other safeguard measure by a control device.
Can be suitable for receiving the signal of asymmetrical state in the expression electric power electronic module according at least one control device of example embodiment of the present utility model.
Asymmetrical state or asymmetric condition for example as the asymmetric signal in the dc voltage in the DC of transducer link, can be interpreted as the fault at transducer semiconductor place.
Can be suitable for initiating a plurality of semi-conductive conducting of electric power electronic module so that overcurrent is spread to the semiconductor of conducting according at least one control device of example embodiment of the present utility model.
Even electric power electronic module exists under the situation of fault during operation, and such controller also can provide the safety operation of protective device under the situation of operation not being carried out any interruption.Therefore, the cut-out to electric power electronic module is avoidable.For example overcurrent can be spread to other semiconductor by connecting these semiconductors.Overcurrent can be scattered, and therefore for a semiconductor overcurrent can be reduced.
Can provide a kind of power electronic system according to example embodiment of the present utility model, it can comprise protective device as described above.
Power electronic system with protective device can comprise a plurality of electric power electronic modules.Therefore, power electronic system can comprise different types of electric power electronic module, for example uses the module of different frequency, such as 50HZ or 16.7HZ.These different electric power electronic modules can be used to different purposes, such as generating and transmitting device, such as train.
Description of drawings
Below, will explain in more detail example embodiment of the present utility model with reference to the accompanying drawings, wherein:
Fig. 1 schematically show first example embodiment of the present utility model and
Fig. 2 schematically shows second example embodiment of the present utility model.
Reference marker among the figure and their implication are listed in the list of reference signs with the form of summary sheet.In principle, same in the drawings part is used identical reference marker.
Embodiment
Fig. 1 shows first example embodiment of the present utility model.The protective device 100 that is used for modularization (modular) power electronic system in Fig. 1 comprises first protection device 11, second protection device 12, first control device 21 and second control device 22.In addition, Fig. 1 schematically shows first power module 150 and second power module 160.These power modules 150,160 for example are the AC-DC transducers, and it can protected unit protection.First protection device 11 and first control device 21 are assigned to first power module 150 respectively on function.Second protection device 12 and second control device 22 are assigned to second power module 160 respectively on function.
In Fig. 1, first protection device 11 comprises first output, 31 and second output 41.Second protection device 12 comprises the 3rd output the 32 and the 4th output 42.In addition, first control device 21 comprises first input, 51, second input the 61 and the 3rd input 71.In addition, first controller 21 comprises the 5th other output 81.Second control device comprises the 4th input the 52, the 5th input the 62 and the 6th input 72.In addition, second control device 22 comprises the 6th output 82.
In Fig. 1, first output 31 of first protection device 11 is connected with first input 51 of first control device 21 by first connection 91.Second output 41 of first protection device 11 is connected to the 5th input 62 of second control device 22 by second connection 92.The 3rd output 32 of second protection device 12 is connected to the 4th input 52 of second control device 22 by the 3rd connection 93.The 4th output 42 of second protection device 12 is connected with second input 61 of first control device 21 by the 4th connection 94.The 5th output 81 of first control device 21 is connected to the 6th input 72 of second control device 22 by the 5th connection 95.The 6th output 82 of second control device 22 is connected to the 3rd input 71 of first control device 21 by the 6th connection 96.
In Fig. 1, first control device 21, the 5th connection 95, second control device 22 are connected 96 and have been built into ring (loop) structure 99 or have encircled 99 with the 6th.In other words, in the connection that is one another in series of ring 99 inner control devices 21,22.In Fig. 1, connecting 91,92,93,94,95,96 is respectively that optical fiber connects.
Fig. 2 schematically shows second example embodiment of the present utility model.In Fig. 2, the protective device 200 that is used for the modularization power electronic system comprises some protection devices 11,111,211,311,411,511,611 and 711.In addition, protective device 200 comprises some control devices 21,121,221,321,421,521,621 and 721.Protective device among Fig. 2 comprises first control device 21 and the most last control device 721, and wherein control device 21,121,221,321,421,521,621 and 721 is connected in series.The most last control device 721 is by encircling 99 or be connected to first control device 21 from the connection of the most last control device 721 to first control devices 21.
In addition, the protective device among Fig. 2 200 comprises first protection device 11 and the most last protection device 711.The most last protection device 711 is connected with first control device 21.In addition, protection device 11,211,311,411,511,611,711 is to be connected to control device 21,121,221,321,421,521,621 and 721 at the described similar fashion of the device of Fig. 1.Protective device 100,200 among Fig. 1 and Fig. 2 comprises seemingly ring structure (loop-like-structure) and with the control device relevant ring structure relevant with protection device.
Should be noted that the circle (ring) that in Fig. 2, illustrates eight protection devices or like the ring of ring structure and eight control devices.Yet, other example embodiment can be provided, it can comprise more than eight control device with more than eight protection device, for example 12 control devices and 12 protection devices.Also can provide and comprise the example embodiment that is less than eight control devices and is less than eight protection devices.Predictably, the number of protection device can be decided according to the number of control device in a protective device.For example the number of the number of protection device and control device is same.Also possible is that the number of protection device is the multiple of control device number.
At Fig. 1 and Fig. 2 middle controller spare 21,121,221,321,421,521,621 and 721 can be decentralized controller.Each electric power electronic module and the controller that is assigned with thereof can be the self-protection systems.Can use the protective device of Fig. 1 and Fig. 2 so that protect electric power electronic module, particularly protect the semiconductor of these electric power electronic modules.Electric power converter (power converter) can comprise a plurality of semiconductors and can be multiphase converter for example have the three phase converer that is used to drive three cameras.If one of transducer breaks down mutually, for example conducting of semiconductor mistake (conduct), the intermediate circuit of transducer or DC link can be by bypasses so.Under these circumstances, the DC link can discharge owing to the former of the electric capacity in the DC link thereby by short circuit current.In addition, the electrical network of connection can be cut off until power switch to the short circuit current power supply.Under such short-circuit conditions, one of transducer can not born whole short circuit current mutually, thereby does not have impaired danger.Therefore, can be connected to the additional phase of this link and provide sharing or the shunting of short circuit current of short circuit current short circuit current shunting in mutually different by use.For such protection is provided, can utilize quick short-circuit detecting (fast short circuit detection, FSCD).FSCD can detect semi-conductive wrong conducting.An example measuring such mistake can increase (di/dt) and be provided by detecting electric current, and this electric current increase may cause by the changes of magnetic field at the measurement mechanism place, for example clamper inductance rate (clamp inductivity).Under the situation that may surpass predetermined value, short-circuit detecting can send light pulse to decentralized controller fast.Exchange periodically (regular commutation) light pulse can be provided, it has the duration less than 15 μ s (millisecond).Duration may be 15 μ s or longer when breaking down.Therefore, light pulse can allow to monitor electric power electronic module and detection failure.
Receive at decentralized controller under the situation of pulse that may be longer than preset value, described pulse is for example long than 15 μ s, may have short circuit.Can nonserviceable connection and signal can be provided to open power switch by the corresponding semiconductor of monitoring control devices and protection.Meanwhile, guarded command can be sent to adjacent controller, and it also can initiate electronic ignition (electronic firing) or door triggers (gatetriggering) and it can transmit other order to next controller.
Except the scene of this description, for example may drop to the situation that is lower than predetermined value at link voltage, nominal voltage 50% the situation that descends for example, the other fault at the transducer place can be detected.In addition, can detect the asymmetric detection in the link circuit and can initiate electronic ignition or door triggers so that scatter fault current.
Short-circuit detecting device can the mode like circle (ring-like) as illustrated in fig. 1 and 2 be connected with local (local) controller fast.Fast the connection of short-circuit detecting can forever be monitored and the defective in these connect can cause the controlled cut-out (controlled switch-off) of power electronic system.This perhaps is possible, because fast short-circuit detecting device can send signal to the next controller of self or controller that is assigned with and coil structures.Therefore, under the situation about breaking down in these connect or having under the situation of defect Control device, can guarantee protection, and can provide semi-conductive igniting or semi-conductive door to trigger power module.Because each control device can comprise input from the first quick short-circuit detecting device, from the input of the second quick short-circuit detecting device and the input of control device before, so can provide redundant signals.
In Fig. 1 and Fig. 2, show a plurality of connections, it comprises arrow, is presented at an end of connection respectively.This arrow can be indicated the direction from a device to the information that another device sent.Information can comprise the signal that measuring-signal, switching command and initiation protection are measured.
In Fig. 1 and 2, protection device also can provide overcurrent protection and/or overvoltage protection.Overcurrent protection can with flow through semi-conductive current related.May surpass under the situation of predetermined value at electric current, control semi-conductive pulse and can stop certain hour, this also can be known as pulse and remove.If the electric current of being monitored descends and reach the value that may be lower than predetermined value behind certain hour, then transducer may be again Be Controlled in a usual manner.Under the situation of such overcurrent protection, may only occur once and described time of overcurrent of time short (for example in the scope of some μ s) shortly just can be eliminated under the situation of not cutting off transducer or whole power electronic system.Such overcurrent may be caused by the electrical network internal fault.
Overvoltage protection can refer to DC (direct current) link voltage of transducer link.If DC link voltage surpasses predetermined value, but then semi-conductive pulse short-term interruption, and this removes down in the term pulse is known.Reach predetermined value if voltage may reduce, then transducer can continue to work in a usual manner.Therefore may only occur once and overvoltage that the duration is short can be controlled under the situation of not closing transducer or whole power electronic system.Such overvoltage causes by the fault that occurs in the electrical network, for example by the switching of power switchgear.
The strictness that the utility model can provide power electronics to protect local control distributes, and this part control can be assigned to electric power electronic module.Can be provided by of the protection of igniting adjacent semiconductor semi-conductive protection with minimizing or distribution fault current.
In addition, detect DC link short circuit by under-voltage and/or symmetrical voltage and semiconductor failure is possible.In addition, the maximum time monitoring by electric current rising (di/dt) in the semiconductor can provide semiconductor failure to detect.And, the monitoring of quick short-circuit detecting device can be provided by the minimum time monitoring of electric current rising (di/dt) in the semiconductor.
In addition, can be provided for very direct communication between the local power electronic controller of defencive function fast.And, the quick short-circuit detecting device in quick short-circuit detecting link ring to they local control and can be predicted direct connection of next controller to guarantee the protection under the situation of local control fault.
Should be noted that term " comprises " does not get rid of other elements or step, and " one " or " one " does not get rid of a plurality of.And can make up element with the related description of different embodiment.
Shall also be noted that reference marker in the claim should not be interpreted as the restriction to the claim scope.
List of reference signs
11 first protection devices
12 second protection devices
21 first control devices
22 second controller spares
31 first outputs
32 the 3rd outputs
41 second outputs
42 the 4th outputs
51 first inputs
61 second inputs
71 the 3rd inputs
52 the 4th inputs
62 the 5th inputs
72 the 6th inputs
81 the 5th outputs
82 the 6th outputs
91 first connect
92 second connect
93 the 3rd connect
94 the 4th connect
95 the 5th connect
96 the 6th connect
99 rings
100 protective devices
111 protection devices
121 control devices
150 first power modules
160 second power modules
200 protective devices
211 protection devices
221 control devices
311 protection devices
321 control devices
411 protection devices
421 control devices
511 protection devices
521 control devices
611 protection devices
621 control devices
711 protection devices
721 control devices
Claims (15)
1. be used for the protective device of electric power electronic module, it is characterized in that, described protective device (100) comprising:
A plurality of protection devices (11,12),
A plurality of control devices (21,22),
Wherein each protection device (11,12) and at least two control devices (21,22) connect and
Wherein each control device (21,22) and another control device (21,22) connection at least.
2. protective device as claimed in claim 1 comprises:
First protection device (11),
The most last protection device (711),
First control device (21),
The most last control device (721),
The most last wherein said protection device (711) be connected with described first control device (21) and
The most last wherein said controller (721) is connected with described first control device (21).
3. protective device as claimed in claim 2,
Wherein said first protection device (11) on function, be assigned to first electric power electronic module (150) and
Wherein said first control device (21) is assigned to described first electric power electronic module (150) on function.
4. protective device as claimed in claim 3,
Wherein second protection device (12) on function, be assigned to described second electric power electronic module (160) and
Wherein second control device (22) is assigned to described second electric power electronic module (160) on function.
5. as each described protective device of claim 2 to 4,
Wherein said first protection device (11) connects (91) by first and is connected to described first control device (21),
Wherein said first protection device (11) connects (92) by second and is connected to described second control device (22),
Wherein said second protection device (12) by the 3rd connect (93) be connected to described second control device (22) and
Wherein said second protection device (22) connects (94) by the 4th and is connected to described first control device (21).
6. protective device as claimed in claim 5,
Wherein said first control device (21) is connected to described second control device (22) by the 5th connection (95) and described second controller (22) is connected to described first control device (21) by the 6th connection (96).
7. protective device as claimed in claim 6,
Wherein described control device (21,22) is connected to each other in ring (99).
8. protective device as claimed in claim 7,
Wherein at least one described connection (91,92,93,94) is that optical fiber connects.
9. protective device as claimed in claim 8,
Wherein at least one described protection device (11,21) is quick short-circuit detecting device.
10. protective device as claimed in claim 9,
Wherein at least one described protection device (11,21) is an over-current protection device.
11. protective device as claimed in claim 10,
Wherein at least one described protection device (11,21) is an overvoltage protecting device.
12. protective device as claimed in claim 11,
Wherein at least one control device (11,21) is suitable for receiving the light pulse of various durations.
13. protective device as claimed in claim 12,
Wherein at least one control device (11,21) is suitable for receiving the signal of the asymmetrical state in the described electric power electronic module of expression (150,160).
14. protective device as claimed in claim 13,
Wherein at least one control device (11,21) is suitable for initiating a plurality of semi-conductive connection in the electric power electronic module (150,160) so that overcurrent is spread to the described semiconductor of connection.
15. a power electronic system is characterized in that, comprising:
According to a described protective device in the claim 1 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201780113U CN201590758U (en) | 2009-08-26 | 2009-08-26 | Protective device for power electronic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201780113U CN201590758U (en) | 2009-08-26 | 2009-08-26 | Protective device for power electronic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201590758U true CN201590758U (en) | 2010-09-22 |
Family
ID=42750553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201780113U Expired - Fee Related CN201590758U (en) | 2009-08-26 | 2009-08-26 | Protective device for power electronic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201590758U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106468896A (en) * | 2015-08-21 | 2017-03-01 | 浙江正泰电器股份有限公司 | combined protector |
-
2009
- 2009-08-26 CN CN2009201780113U patent/CN201590758U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106468896A (en) * | 2015-08-21 | 2017-03-01 | 浙江正泰电器股份有限公司 | combined protector |
| CN106468896B (en) * | 2015-08-21 | 2019-09-06 | 浙江正泰电器股份有限公司 | Combined protector |
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Granted publication date: 20100922 Termination date: 20150826 |
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