CN106655819A - Short-circuit current rectifier device protection device for bidirectional converter - Google Patents
Short-circuit current rectifier device protection device for bidirectional converter Download PDFInfo
- Publication number
- CN106655819A CN106655819A CN201611116262.XA CN201611116262A CN106655819A CN 106655819 A CN106655819 A CN 106655819A CN 201611116262 A CN201611116262 A CN 201611116262A CN 106655819 A CN106655819 A CN 106655819A
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- Prior art keywords
- igbt
- circuit current
- short circuit
- rectifying device
- igbta4
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Classifications
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/125—Avoiding or suppressing excessive transient voltages or currents
-
- 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
-
- 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
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention relates to a short-circuit current rectifier device protection device for a bidirectional converter. The protection device is characterized by comprising a set of rectifier devices, power device IGBTs, clamping diodes and support capacitors, wherein the rectifier devices are connected with the power device IGBTs in parallel to form two groups of uncontrolled rectifier bridge arms; and the support capacitors are connected with the power device IGBTs in parallel. According to the protection device, the condition that short-circuit current flows through the rectifier devices can be effectively ensured, the current flowing through fly-wheel diodes of the IGBTs is reduced to a tolerable range and the IGBTs are effectively prevented from being damaged.
Description
Technical field
The present invention relates to a kind of protection device, and in particular to a kind of two way convertor short circuit current rectifying device protection dress
Put, belong to track traffic electric supply installation technical field.
Background technology
In Rail Transit System, traction power supply is in extremely critical ground as core and power source in total system
Position.At present, the tractive power supply system of urban track traffic is still generally by the way of diode rectification unit is powered, the supplier of electricity
Formula has the disadvantage that：1st, DC voltage fluctuation is exported big；2nd, regenerating braking energy cannot be processed：3rd, system power factor
It is uncontrollable；The High power Traction being made up of all-controlling power electronics device IGBT two way convertor of powering can thoroughly solve above-mentioned two
The shortcoming that pole pipe Rectification Power Factor is present.
Due to the particularity of track drawing electric supply installation application, inevitably DC side will occur in use short
The failure on road.When dc-side short-circuit occurs, IGBT necessarily enters blocked styate by internal protection, and now short circuit current is from mould
Inverse parallel fly-wheel diode in block flows through.It is the detection for ensureing dc switch to DC Line Fault point when dc-side short-circuit occurs
Function, needs to ask two way convertor immediately to send input and output to protect the power device of itself after locking pulse
The trip command of side, that is, require power device need to meet short circuit current it is long when tolerance require.Due to IGBT and rectifying device
Mechanism's diversity, the fly-wheel diode I of IGBT2T parameter will far can not meet the requirement of short circuit current tolerance, if do not take arranging
Apply power device IGBT and will occur the impaired phenomenon even damaged because of heat effect.Because track drawing electric supply installation can not be kept away
The failure that is short-circuited exempted from, although two way convertor can solve the shortcoming of diode rectifier presence, if but short circuit cannot be solved
When power device Commpensation And Adaptation, two way convertor will be unable to be promoted in commercial Application.For the problem, this area
Technical staff has attempted to new scheme, but the problem is never properly settled.
The content of the invention
The present invention is exactly for technical problem present in prior art, there is provided a kind of two way convertor short circuit current rectification
Apparatus protective device, the technical scheme provides a kind of two way convertor power cell to be used to complete DC voltage-stabilizing output, Brake Energy
Amount feedback, the function of System Reactive Power compensation；When the technical scheme provides one kind for two way convertor power cell direct-current short circuit
The tolerance device of shunting short circuit current is to protect power device IGBT, next to that tolerance device can bear short circuit current and not damage
It is bad, it is ensured that to be reliably mounted in power cell, it is not required to increase the volume of power cell.
To achieve these goals, technical scheme is as follows, a kind of two way convertor short circuit current rectifying device
Protection device, it is characterised in that the protection device include a set of rectifying device, power device IGBT, clamp diode and
Support Capacitor, the rectifying device (D1-D4) is in parallel with power device IGBT, constitutes two groups of uncontrollable rectifier bridge arms, the support
Electric capacity is in parallel with power device IGBT.
Used as a modification of the present invention, the rectifying device includes rectifying device D1, D2, D3, D4, wherein rectifying device
D1, D2, D3, D4 are in parallel with IGBT, and one end of rectifying device D1, D2, D3, D4 is connected to dc bus, other end connection
In alternating current inlet wire AC.
Used as a modification of the present invention, the Support Capacitor includes supporting electricity C13 and Support Capacitor C14, the support
Electric C13 and Support Capacitor C14 are in parallel with power device IGBT；The clamp diode includes D11, D12, D21, D22.
As a modification of the present invention, the power device IGBT include 1#IGBTA1,1#IGBTA2,1#IGBTA3,
1#IGBTA4,2#IGBTA1,2#IGBTA2,2#IGBTA3,2#IGBTA4, wherein 1#IGBTA2,1#IGBTA3 are arranged on 1#
Between IGBTA1 and 1#IGBTA4,2#IGBTA2,2#IGBTA3 are arranged between 2#IGBTA1 and 2#IGBTA4；And clamper two
Pole pipe D11 is in parallel with power device 1#IGBTA2, and clamp diode D12 is in parallel with power device 1#IGBTA3, the pole of clamper two
Pipe D21 is in parallel with power device 2#IGBTA2, and clamp diode D22 is in parallel with power device 2#IGBTA3.
Used as a modification of the present invention, the resistance value of the connection dc bus of described rectifying device D1, D2, D3, D4 is little
In 0.1m Ω.
As a modification of the present invention, rectifying device internal resistance rT= 0.253mΩ。
As a modification of the present invention, the mode that the connection of rectifying device is directly crimped from 3mm copper bars, it is ensured that press
The reliability for connecing.
A kind of two way convertor short circuit current rectifying device protection device, its job step is as follows：Step 1, Bidirectional variable-flow
It is 1#IGBTA1-1#IGBTA4,2#IGBTA1-2#IGBTA4, the pole of clamper two to provide by power device IGBT during device normal work
Pipe D11, D12, D21, D22 and Support Capacitor C13, C14 triggering complete DC voltage-stabilizing output, DC energy feedback, System Reactive Power
Compensation；Step 2, IGBT i.e. 1#IGBTA1-1#IGBTA4,2#IGBTA1-2#IGBTA4 protection block when there is short trouble
Pulse；Step 3, dc-side short-circuit fault is not released, and short circuit current is carried by rectifying device D1-D4 and IGBT fly-wheel diode parallel connection
For；Step 4, rectifying device D1-D4 loop internal resistances are much smaller than IGBT fly-wheel diode internal resistances, and most short circuit current is by whole
Stream device D1-D4 flows through in loop, and IGBT fly-wheel diodes are subjected only to the electric current of very little.
Relative to prior art, the invention has the advantages that, 1）The technical scheme global design is ingenious, compact conformation；
2）Two way convertor short circuit current rectifying device protection device in the technical scheme causes two way convertor to have diode concurrently
The strong advantage of commutator high current tolerance, also solves that diode rectifier output DC voltage fluctuation is big, cannot process
Regenerating braking energy, the uncontrollable shortcoming of system power factor, 3）Rectifying device in the technical scheme only triggers arteries and veins in IGBT
Just there is electric current to pass through after punching block, the time is also shorter, therefore without radiator is installed, the space of very little can install, rectification
Device is directly installed in power cell, without the need for individually increasing cabinet, reduces the volume of installation；4）The technical scheme into
This is relatively low, is easy to large-scale popularization and application.
Description of the drawings
Fig. 1 is the electrical connection schematic diagram of whole protection device；
Fig. 2 is on off operating mode schematic diagram of the present invention；
Fig. 3 is rectifying device shunting measured waveform figure, and wherein 2# passages are alternating current inlet wire electric current, and 3# passages are rectifying device electricity
Stream.
In figure：Rectifying device：D1-D4, power device：1#IGBTA1-1#IGBTA4,2#IGBTA1-2#IGBTA4, clamper
Diode：D11, D12, D21, D22, Support Capacitor：C13、C14.
Specific embodiment：
In order to deepen the understanding of the present invention, the present embodiment is described in detail below in conjunction with the accompanying drawings.
Embodiment 1：Referring to Fig. 1, a kind of two way convertor short circuit current rectifying device protection device, the protection device bag
A set of rectifying device D1-D4 is included, power device IGBT is 1#IGBTA1-1#IGBTA4,2#IGBTA1-2#IGBTA4, clamper two
Pole pipe D11, D12, D21, D22 and Support Capacitor C13, C14, the rectifying device D1-D4 is in parallel with power device IGBT, group
Into two groups of uncontrollable rectifier bridge arms, the Support Capacitor is in parallel with power device IGBT；The rectifying device include rectifying device D1,
D2, D3, D4, wherein rectifying device D1, D2, D3, D4 is in parallel with IGBT, one end connection of rectifying device D1, D2, D3, D4
In dc bus, the other end is connected to alternating current inlet wire AC, and the Support Capacitor includes supporting electricity C13 and Support Capacitor C14, described
Support electricity C13 and Support Capacitor C14 in parallel with power device IGBT；The clamp diode includes D11, D12, D21, D22, institute
Power device IGBT is stated including 1#IGBTA1,1#IGBTA2,1#IGBTA3,1#IGBTA4,2#IGBTA1,2#IGBTA2,2#
IGBTA3,2#IGBTA4, wherein 1#IGBTA2,1#IGBTA3 are arranged between 1#IGBTA1 and 1#IGBTA4,2#IGBTA2,2#
IGBTA3 is arranged between 2#IGBTA1 and 2#IGBTA4；And clamp diode D11 is in parallel after connecting with D12 and power device
1#IGBTA2,1#IGBTA3 two ends, clamp diode D21 is in parallel with power device 2#IGBTA2,2# after connecting with D22
IGBTA3 two ends.The technical scheme can effectively ensure that short circuit current is flow through by rectifying device so that flow through IGBT afterflows two
The current reduction of pole pipe is effectively protected that IGBT is injury-free in the range of it can bear, and the rectifying device for being installed additional only exists
Just there is electric current to flow through after IGBT block trigger pulses, and the short trouble mute time does not allow more than 1s clocks, therefore without the need in addition
Heat abstractor is installed additional to rectifying device, installation volume is reduced.
Embodiment 2：Referring to Fig. 1, used as a modification of the present invention, the connection of described rectifying device D1, D2, D3, D4 is straight
The resistance value of stream bus is less than 0.1m Ω, so can ensure that high current tolerance during dc-side short-circuit, its normal operating conditions
When power device IGBT triggered as normal, for complete DC voltage-stabilizing output, braking energy feedback, System Reactive Power compensation, now bear
Carry electric current mainly to be controlled to adjust by the triggering of IGBT loops.
Embodiment 3：Referring to Fig. 1, Fig. 2 is the fundamental diagram of the resistance to protected device of two way convertor short circuit current, now
DC side is short-circuited failure, and because the protection response time of IGBT is shorter, IGBT block trigger pulse, i.e. IGBT are in open circuit
State, because short dot is still present, now short circuit current is mainly by rectifying device D1-D4,1#IGBTA1-1#IGBTA4 and 2#
IGBTA1-2#IGBTA4 is provided, due to IGBT and mechanism's diversity of rectifying device, the fly-wheel diode I of IGBT2T parameter compared with
It is little, it is impossible to high current tolerance when bearing long, therefore now short circuit current is mainly carried by the less rectifying device D1-D4 of internal resistance
For.High current under to ensure the operating mode is mainly provided by rectifying device D1-D4, should take following measures：1）Rectifying device should
Meet I2t=6125kA2S, rectifying device internal resistance rT=0.253m Ω, 2）The connection of rectifying device is directly crimped from 3mm copper bars
Mode, it is ensured that the reliability of crimping.
Operation principle：Referring to Fig. 1, Fig. 2, Fig. 3, a kind of two way convertor short circuit current rectifying device protection device, its work
Make step as follows：Step 1, it is 1#IGBTA1-1#IGBTA4,2# to provide by power device IGBT during two way convertor normal work
It is defeated that IGBTA1-2#IGBTA4, clamp diode D11, D12, D21, D22 and Support Capacitor C13, C14 triggering complete DC voltage-stabilizing
Go out, DC energy feedback, System Reactive Power compensation；Step 2, IGBT i.e. 1#IGBTA1-1#IGBTA4,2# when there is short trouble
IGBTA1-2#IGBTA4 protects locking pulse；Step 3, dc-side short-circuit fault is not released, and short circuit current is by rectifying device D1-
D4 and IGBT fly-wheel diodes are in parallel to be provided；Step 4, rectifying device D1-D4 loop internal resistances are much smaller than in IGBT fly-wheel diodes
Resistance, most short circuit current is flow through by rectifying device D1-D4 loops, and IGBT fly-wheel diodes are subjected only to the electric current of very little.
High current shunting measured waveform when Fig. 3 is short circuit, from the waveforms it can be seen that when short circuit occurs, oscillograph 2# Air conduct measurements are handed over
Stream inlet wire current is 6.81kA, and the electric current of oscillograph 3# Air conduct measurement rectifying devices is 6.63kA, and the electric current of IGBT is only 6.81-
6.63=0.18kA, that is, increase after rectifying device, when short circuit occurs by the powerful I of rectifying device2T thermal capacitances can be effective
Protection IGBT is not subject to the impact of high current, can both protect that rectifying device is injury-free can also to ensure that IGBT will not be damaged.
At least one of technical characteristic described in embodiment 2,3 can also be combined to form new by the present invention with embodiment 1
Embodiment.
It should be noted that above-described embodiment, not for limiting protection scope of the present invention, in above-mentioned technical proposal
On the basis of done equivalents or replacement each fall within the scope that the claims in the present invention are protected.
Claims (9)
1. a kind of two way convertor short circuit current rectifying device protection device, it is characterised in that the protection device includes a set of
Rectifying device, power device IGBT, clamp diode and Support Capacitor, the rectifying device is in parallel with power device IGBT,
Two groups of uncontrollable rectifier bridge arms are constituted, the Support Capacitor is in parallel with power device IGBT.
2. two way convertor short circuit current rectifying device protection device according to claim 1, it is characterised in that described whole
Stream device is diode or controllable silicon.
3. two way convertor short circuit current rectifying device protection device according to claim 1, it is characterised in that described whole
Stream device includes rectifying device D1, D2, D3, D4, and wherein rectifying device D1, D2, D3, D4 is in parallel with IGBT, rectifying device
One end of D1, D2, D3, D4 is connected to dc bus, and the other end is connected to alternating current inlet wire AC.
4. two way convertor short circuit current rectifying device protection device according to claim 2, it is characterised in that described
Support electric capacity includes Support Capacitor C13 and Support Capacitor C14, the support electricity C13 and Support Capacitor C14 and power device IGBT simultaneously
Connection；The clamp diode includes D11, D12, D21, D22.
5. two way convertor short circuit current rectifying device protection device according to claim 3, it is characterised in that the work(
Rate device IGBT include 1#IGBTA1,1#IGBTA2,1#IGBTA3,1#IGBTA4,2#IGBTA1,2#IGBTA2,2#IGBTA3,
2#IGBTA4, wherein 1#IGBTA2,1#IGBTA3 are arranged between 1#IGBTA1 and 1#IGBTA4,2#IGBTA2,2#IGBTA3
It is arranged between 2#IGBTA1 and 2#IGBTA4；And clamp diode D11 is in parallel with power device 1# after connecting with D12
IGBTA2,1#IGBTA3 two ends, clamp diode D21 is in parallel with power device 2#IGBTA2,2#IGBTA3 after connecting with D22
Two ends.
6. two way convertor short circuit current rectifying device protection device according to claim 4, it is characterised in that described whole
The resistance value of the connection dc bus of stream device D1, D2, D3, D4 is less than 0.1m Ω.
7. two way convertor short circuit current rectifying device protection device according to claim 5, it is characterised in that described whole
The internal resistance r of stream device D1, D2, D3, D4T= 0.253mΩ。
8. the two way convertor short circuit current rectifying device protection device according to claim 5 or 6, it is characterised in that whole
The mode that the connection of stream device is directly crimped from 3mm copper bars, it is ensured that the reliability of crimping.
9. two way convertor short circuit current rectifying device protection device according to claim 3, it is characterised in that its feature
It is that its job step is as follows：Step 1, it is 1#IGBTA1-1# to provide by power device IGBT during two way convertor normal work
IGBTA4,2#IGBTA1-2#IGBTA4, clamp diode D11, D12, D21, D22 and Support Capacitor C13, C14 triggering complete straight
Stream voltage stabilizing output, DC energy feedback, System Reactive Power compensation；Step 2, the IGBT i.e. 1#IGBTA1-1# when there is short trouble
IGBTA4,2#IGBTA1-2#IGBTA4 protect locking pulse；Step 3, dc-side short-circuit fault is not released, and short circuit current is by whole
Stream device D1-D4 and IGBT fly-wheel diode is in parallel to be provided；Step 4, rectifying device D1-D4 loop internal resistances are much smaller than IGBT afterflows
Diode internal resistance, most short circuit current is flow through by rectifying device D1-D4 loops, and IGBT fly-wheel diodes are subjected only to very little
Electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611116262.XA CN106655819B (en) | 2016-12-07 | 2016-12-07 | Protector for short-circuit current rectifier of bidirectional converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611116262.XA CN106655819B (en) | 2016-12-07 | 2016-12-07 | Protector for short-circuit current rectifier of bidirectional converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106655819A true CN106655819A (en) | 2017-05-10 |
| CN106655819B CN106655819B (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611116262.XA Active CN106655819B (en) | 2016-12-07 | 2016-12-07 | Protector for short-circuit current rectifier of bidirectional converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188177A (en) * | 2018-10-01 | 2019-01-11 | 徐州中矿大传动与自动化有限公司 | A kind of high-power NPC three-level inverter short circuit current on-line detecting system |
| CN109698496A (en) * | 2017-10-20 | 2019-04-30 | 株洲中车时代电气股份有限公司 | A kind of rail traffic tractive power supply system and control method |
| CN110474550A (en) * | 2019-08-21 | 2019-11-19 | 阳光电源股份有限公司 | A kind of striding capacitance type NPC three-level topology |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3143235A1 (en) * | 2022-12-09 | 2024-06-14 | Electricite De France | METHOD FOR PROTECTING CONVERTERS AGAINST DOWNSTREAM SHORT CIRCUITS |
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| CN1881767A (en) * | 2006-03-08 | 2006-12-20 | 合肥阳光电源有限公司 | Control structure of full power type AC-DC-AC converter for wind power generation |
| CN102394557A (en) * | 2011-09-06 | 2012-03-28 | 清华大学 | Hybrid parallel type high-voltage direct current traction power supply current transformer and control method thereof |
| CN102709994A (en) * | 2012-06-06 | 2012-10-03 | 上海煦达新能源科技有限公司 | Charge-discharge two-way power converter for battery for electric car |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1881767A (en) * | 2006-03-08 | 2006-12-20 | 合肥阳光电源有限公司 | Control structure of full power type AC-DC-AC converter for wind power generation |
| CN102394557A (en) * | 2011-09-06 | 2012-03-28 | 清华大学 | Hybrid parallel type high-voltage direct current traction power supply current transformer and control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109698496A (en) * | 2017-10-20 | 2019-04-30 | 株洲中车时代电气股份有限公司 | A kind of rail traffic tractive power supply system and control method |
| CN109188177A (en) * | 2018-10-01 | 2019-01-11 | 徐州中矿大传动与自动化有限公司 | A kind of high-power NPC three-level inverter short circuit current on-line detecting system |
| CN109188177B (en) * | 2018-10-01 | 2023-12-19 | 江苏国传电气有限公司 | High-power NPC three-level inverter short-circuit current on-line detection system |
| CN110474550A (en) * | 2019-08-21 | 2019-11-19 | 阳光电源股份有限公司 | A kind of striding capacitance type NPC three-level topology |
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| CN106655819B (en) | 2020-02-18 |
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