CN108768184A - A kind of switch power unit and high voltage DC breaker - Google Patents
A kind of switch power unit and high voltage DC breaker Download PDFInfo
- Publication number
- CN108768184A CN108768184A CN201810368462.7A CN201810368462A CN108768184A CN 108768184 A CN108768184 A CN 108768184A CN 201810368462 A CN201810368462 A CN 201810368462A CN 108768184 A CN108768184 A CN 108768184A
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- Prior art keywords
- full
- bridge arm
- valve group
- power module
- controlled device
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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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
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The present invention relates to a kind of switch power unit and high voltage DC breaker, which includes the positive power module being connected in series with and reversed power module；Power module is H bridge modules, including the first bridge arm, two bridge arms and full-controlled device branch in parallel, first bridge arm and the second bridge arm are not controlled device valve group series aiding connection by two and are formed, it is provided with full-controlled device in full-controlled device branch, two series connection points for not controlling device valve group of the first bridge arm are the input/output terminal of power module, and two series connection points for not controlling device valve group of the second bridge arm are the input/output end of power module；The setting direction for not controlling device valve group in two power modules is on the contrary and the setting direction of full-controlled device is opposite.The present invention effectively reduces current flow paths length, reduces branch stray inductance, and then reduce power device loss, increase valve group reliability by the way that two power modules are used positive and negative concatenated form.
Description
Technical field
The present invention relates to a kind of switch power unit and high voltage DC breakers, belong to high voltage DC breaker technology neck
Domain.
Background technology
In recent years, MTDC transmission system is fast-developing, and the direct current transportation network based on flexible DC power transmission is good due to it
Characteristic, it has also become one of the hot spot in International Power field at present also will be the important component of following power grid structure.Have
The dc circuit breaker of high current ability is cut-off in several milliseconds can quickly cut off faulty equipment or circuit, it is ensured that straight-flow system is non-
The stable operation of faulty component, greatly improves system reliability.It is engineered application, indicates the high-end direct current equipment in China
Technology realizes important breakthrough, has greatly pushed China's direct current transportation construction and DC grid to build, to transmission system and power grid
Safe and reliable operation will play a significant role.
2012, the hybrid high voltage DC breaker technology of ABB was succeeded in developing.The hybrid high voltage DC breaker master
To include that (semiconductor breaks for mechanical switch branch (Quick mechanical disconnecting switch+load changeover switch) and semiconductor switch branch
Road device+arrester group).2014, Alstom completed its hybrid high voltage DC breaker raw product.The hybrid high pressure
Dc circuit breaker includes mainly by-pass switch (UFD+PES), semiconductor switch branch 1 (thyristor+arrester), semiconductor switch
Branch 2 (thyristor+capacitor) and arrester group.
The high voltage DC breaker developed both at home and abroad at present is both needed to include semiconductor switch branch, semiconductor switch branch
Switching speed in Microsecond grade even nanosecond, cause to be resistant in component dynamic process electric current and voltage change ratio reach several kA/us,
kV/us.String is equipped with IGBT module in semiconductor switch branch, and the common structure of existing IGBT module includes half-bridge structure and full-bridge
Structure, wherein half-bridge structure are by two IGBT differential concatenations, by the diode current flow of IGBT and reversed the IGBT parallel connection of same forward direction
And cut-off current, full bridge structure are made of four IGBT and antiparallel diode, number of devices is twice of anti-series structure,
Cut-off current ability is also twice as.IGBT quantity used in both modes is more, of high cost, and valve string volume is big.
In addition, since IGBT valves are the series connection of multiple IGBT modules, and divide multi-tier arrangement, with 160kV high voltage DC breakers
For, generally 108 three layer arrangements of block coupled in series point, single layer need to realize 36 block coupled in series；It is wanted according to the symmetry of arrangement
It asks, the quantity of single-beat valve string should be even number.Again because crimp type IGBT string length is not to be exceeded 2 meters, therefore single-beat valve string number is at least 4
It is a, so each valve string should be formed by 9 block coupled in series.Every layer includes 4 series valve strings, and each 2 of left and right is symmetrical, 9
Module is concatenated arrangement.Unidirectionally connect between two modules according to traditional IGBT series systems, i.e. first module with
The installation polarity of second module is equidirectional series connection.This mode series current path is longer, and branch random thoughts are larger.IGBT goes here and there
Random thoughts in connection branch cross conference and cause that IGBT surge currents are big, peak voltage is high and pulse top concussion, to main circuit and
Driving circuit impacts, and increases power device loss, IGBT can be also damaged when serious.Therefore, IGBT series connection branch is reduced
Random thoughts in road are that key problems-solving is needed in main loop design.
For example, the Chinese patent document that publication No. is CN107124167A discloses a kind of electronic DC switch and its switch
Power module, the switch power module are a submodule lists by full-controlled device and by 4 rectifier diodes as bridge arm
Member composition, structural schematic diagram when Fig. 1 gives two switch power block coupled in series.The switch power module can reduce system
This is caused, and remains the ability of bidirectional cutting electric current.But when by multiple such switch power block coupled in series crimping,
The problems such as there are electric current flow path is long, and branch random thoughts are larger.
In addition, semiconductor subassembly quantity is sharply increased with the raising of voltage class, the string of so many power device
Parallel connection, the otherness of the performance of device itself and the influence of major loop parasitic parameter, the local road design of semiconductor subassembly unit
Difficulty increases, and the difficulty designed semiconductor subassembly, loop parameter consistency and damping circuit is increased, to dc circuit breaker
Development brings huge challenge.
Invention content
The object of the present invention is to provide a kind of switch power unit and high voltage DC breakers, are opened existing for solving
Close power module unidirectionally connect crimping when, there is a problem of that electric current flow path length, branch random thoughts are larger.
In order to solve the above technical problems, the present invention provides a kind of switch power units, including the forward direction being connected in series with
Power module and reversed power module；The power module is H bridge modules, including the first bridge arm, the second bridge being connected in parallel
Arm and full-controlled device branch, first bridge arm are not controlled device valve group series aiding connection by two and are formed, and second bridge arm is by another
Device valve group series aiding connection is not controlled for outer two to form, full-controlled device, first bridge arm are provided in the full-controlled device branch
Two series connection points for not controlling device valve group be the power module input/output terminal, two of second bridge arm do not control
The series connection point of device valve group is the input/output end of the power module；In positive power module do not control device valve group with
In reversed power module do not control device valve group setting direction on the contrary, full-controlled device in positive power module with it is reversed
Full-controlled device setting direction in power module is opposite.
The beneficial effects of the invention are as follows：By the way that two power modules to be used to the form of positive anti-series crimping, effectively reduce
Current flow paths length, reduce branch stray inductance, and then reduce power device loss, increase valve group reliability.
The overvoltage and overcurrent that generate in power module when further, in order to eliminate full-controlled device shutdown, described the
Two series aiding connection points for not controlling device valve group in the two series aiding connection points and the second bridge arm for not controlling device valve group in one bridge arm
Between be connected with RC absorb branch.
Further, the device valve group of not controlling is made of the diode of one or at least two series aiding connections, described
Full-controlled device branch route one or the full-controlled device of at least two series/parallels in the same direction is constituted.
Further, the full-controlled device is IGBT.
Further, the RC, which absorbs branch circuit parallel connection, arrester.
The present invention also provides a kind of high voltage DC breakers, including main branch, transfer branch and the energy consumption being connected in parallel
String is equipped with switch power unit in branch, the main branch and/or transfer branch, and the switch power unit includes being connected in series with
Positive power module and reversed power module；The power module is H bridge modules, including the first bridge being connected in parallel
Arm, the second bridge arm and full-controlled device branch, first bridge arm are not controlled device valve group series aiding connection by two and are formed, and described second
Bridge arm is not controlled device valve group series aiding connection by other two and formed, and full-controlled device is provided in the full-controlled device branch, described
Two series connection points for not controlling device valve group of the first bridge arm are the input/output terminal of the power module, second bridge arm
Two series connection points for not controlling device valve group are the input/output end of the power module；Device is not controlled in positive power module
Device valve group setting direction is not controlled on the contrary, full-controlled device in positive power module in part valve group and reversed power module
It is opposite with the full-controlled device setting direction in reversed power module.
Further, two not in the two series aiding connection points and the second bridge arm for not controlling device valve group in first bridge arm
It is connected with RC between the series aiding connection point of control device valve group and absorbs branch.
Further, the device valve group of not controlling is made of the diode of one or at least two series aiding connections, described
Full-controlled device branch route one or the full-controlled device of at least two series/parallels in the same direction is constituted.
Further, the full-controlled device is IGBT.
Further, the RC, which absorbs branch circuit parallel connection, arrester.
Description of the drawings
Fig. 1 be in the prior art two switch power block coupled in series when structural schematic diagram；
Fig. 2 is the structural schematic diagram of high voltage DC breaker；
Fig. 3 is the structural schematic diagram of the switch power unit of the present invention；
Fig. 4 is the topological structure schematic diagram for the power module that the present invention uses；
Fig. 5 is the topological schematic diagram using the switch power unit of unidirectional cascade；
Simulation result diagram when Fig. 6 is the multiple switch power unit cascade by the present invention；
Fig. 7 is simulation result diagram when multiple switch power units using unidirectional cascade are connected.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing and specific implementation
The present invention will be described in further detail for example.
The present invention provides a kind of high voltage DC breaker, structural schematic diagram is as shown in Fig. 2, the master including being connected in parallel
String is equipped with multiple switch power cell, the switch in branch, transfer branch and energy consumption branch, wherein main branch and transfer branch
The structural schematic diagram of power cell in the branch that consumes energy as shown in figure 3, be provided with one or more arresters or other energy consumers
Part.
As shown in figure 3, the switch power unit of the present invention includes the positive power module being connected in series with and reversed work(
Rate module uses the opposite polarity form of installation of two power modules to connect.Wherein, positive power module and anti-
To power module concrete structure it is identical, the direction being only arranged is opposite.Do not considering power device setting direction
In the case of, each power module is H bridge modules, including the first bridge arm, the second bridge arm and the full-controlled device branch being connected in parallel,
First bridge arm is not controlled device valve group series aiding connection by two and is formed, and the second bridge arm is not controlled device valve group series aiding connection by other two
It forms, full-controlled device is provided in full-controlled device branch, two series connection points for not controlling device valve group of the first bridge arm are the power
The input/output terminal of module, two series connection points for not controlling device valve group of the second bridge arm are the input/output of the power module
End.In addition, two in the first bridge arm two not controlled in device valve group series aiding connection point and the second bridge arm do not control device valve
It is connected with RC between group series aiding connection point and absorbs branch, RC, which absorbs branch circuit parallel connection, arrester.
Specifically, in the present embodiment, as shown in figure 4, not controlling device valve group by one in each bridge arm of power module
A diode composition, full-controlled device branch route a full-controlled device IGBT composition.At this time each power module by an IGBT and
Four diodes form, and IGBT quantity is more less than anti-series structure and full bridge structure under identical turn-off capacity, though increase four
Diode, but diode cost is far below IGBT.To electric power be arranged in series in using the switch power unit of the diode bridge
Electric series valve group can meet shutdown dc circuit breaker on the basis of meeting bidirectional current and cut-offfing function without using parallel connection
The quantity of wholly-controled device is greatly reduced in maximum current, improves device utilization rate, significantly reduces cost, has bright
Aobvious advantage.
In positive power module, the full control device that do not control in device valve group and full-controlled device branch in two bridge arms
The positive setting of part；In reversed power module, not controlling in device valve group and full-controlled device branch in two bridge arms
Full-controlled device is oppositely arranged, forward direction setting and it is oppositely arranged be it is opposite, need ensure two power modules in do not control device
The setting direction of part valve group is on the contrary, the setting direction of the full-controlled device in two power modules is opposite.As shown in figure 3, i.e. ought be just
To power module in the conducting direction of upper bridge arm diode D1 in the first bridge arm be from left to right and lower bridge arm diode D2
Conducting direction be that from right to left, and the conducting direction of the upper bridge arm diode D3 in the second bridge arm is from right to left and lower bridge arm
The conducting direction of diode D4 is that from left to right, the conducting direction of full-controlled device IGBT 1 is from top to bottom；Work(reversed at this time
The conducting direction of upper bridge arm diode D5 in rate module in the first bridge arm is from right to left and the conducting of lower bridge arm diode D6
Direction is that from left to right, and the conducting direction of the upper bridge arm diode D7 in the second bridge arm is from left to right and lower bridge arm diode
The conducting direction of D8 is that from right to left, the conducting direction of full-controlled device IGBT 2 is from top to bottom.In addition, when positive power mould
The conducting direction of upper bridge arm diode D1 in block in the first bridge arm is from right to left and the conducting direction of lower bridge arm diode D2
For from left to right, and the conducting direction of the upper bridge arm diode D3 in the second bridge arm is from left to right and lower bridge arm diode D4
Conducting direction is that from right to left, the conducting direction of full-controlled device IGBT 1 is from top to bottom；In power module reversed at this time
The conducting direction of upper bridge arm diode D5 in one bridge arm is from left to right and the conducting direction of lower bridge arm diode D6 is from the right side
The conducting direction of upper bridge arm diode D7 to a left side, and in the second bridge arm is from right to left and the conducting side of lower bridge arm diode D8
To for from left to right, the conducting direction of full-controlled device IGBT 2 is from top to bottom.
It should be noted that as other embodiments, the device valve group of not controlling in power module bridge arm can also be by
Several diodes composition of series aiding connection connection, full-controlled device branch route series/parallel in the same direction connection several IGBT or
Other full-controlled devices form.RC absorbs string in branch and is equipped with resistance and capacitance, as needed can be with parallel connection at the both ends of resistance
One diode.Positive power module can not also be identical with the concrete structure of reversed power module, each power
The structure specifically given in Fig. 4 may be used in module, can also use other structures form in the prior art, but must assure that
The form that two power modules are connected using the crimping of positive anti-series.Furthermore it is possible to select to go here and there in main branch or transfer branch
If above-mentioned switch power unit, and string sets other switch power units in the prior art in another branch.
Fig. 5 gives topological schematic diagram when by two power modules unidirectionally connect, by comparison diagram 3 and Fig. 5
Electric current flow path it is found that the present invention switch power unit by by two power modules using opposite polarity mode into
Row is installed in series, and can effectively reduce current path length, reduce branch stray inductance.
In order to verify the validity of switch power unit of the present invention, using workbench and comsol respectively to being adopted in Fig. 3
Use two kinds of modes of connection of one direction tandem tap power cell spuious in both forward and reverse directions tandem tap power cell and Fig. 5
Inductance distribution situation is emulated, and simulation result difference is as shown in Figure 6 and Figure 7.According to Fig. 6 and Fig. 7 it is found that positive and negative series system
About one third smaller than unidirectional concatenated line inductance, therefore positive and negative concatenated mode can reduce power device loss, reduce
The voltge surge that stray inductance generates when being turned off to IGBT and diode, increases valve group reliability.
The forward and reverse series system of two power modules of the present invention, solves the electricity such as existing high voltage DC breaker
The power electronic equipment valve string number of plies is excessive, needs the problems such as in parallel, also efficiently solves caused by the valve string number of plies is more, current path is grown
Big, the flimsy problem of device is lost caused by random thoughts are big.This mode can greatly save dc circuit breaker or power electronics equipment
Cost, and provide a kind of connection type of high-efficient simple for the reliability of power electronics valve string.
Claims (10)
1. a kind of switch power unit, which is characterized in that including the positive power module being connected in series with and reversed power mould
Block；The power module is H bridge modules, including the first bridge arm, the second bridge arm and the full-controlled device branch that are connected in parallel, described the
One bridge arm is not controlled device valve group series aiding connection by two and is formed, and second bridge arm is not controlled device valve group by other two and gone here and there in the same direction
Join, full-controlled device, two series connection for not controlling device valve group of first bridge arm are provided in the full-controlled device branch
Point is the input/output terminal of the power module, and two series connection points for not controlling device valve group of second bridge arm are the work(
The input/output end of rate module；Device valve group of not controlling in positive power module does not control device with reversed power module
Part valve group setting direction is on the contrary, the full-controlled device in the power module of forward direction is arranged with the full-controlled device in reversed power module
Direction is opposite.
2. switch power unit according to claim 1, which is characterized in that do not control device valve for two in first bridge arm
RC is connected in the series aiding connection point and the second bridge arm of group between two series aiding connection points for not controlling device valve group and absorbs branch.
3. switch power unit according to claim 1 or 2, which is characterized in that it is described do not control device valve group by one or
The diode of at least two series aiding connection of person is constituted, and the full-controlled device branch route one or at least two series/parallels in the same direction
Full-controlled device constitute.
4. switch power unit according to claim 3, which is characterized in that the full-controlled device is IGBT.
5. switch power unit according to claim 2, which is characterized in that the RC, which absorbs branch circuit parallel connection, arrester.
6. a kind of high voltage DC breaker, including the main branch, transfer branch and the energy consumption branch that are connected in parallel, which is characterized in that
String is equipped with switch power unit in the main branch and/or transfer branch, and the switch power unit includes being connected in series with just
To power module and reversed power module；The power module is H bridge modules, including be connected in parallel the first bridge arm, the
Two bridge arms and full-controlled device branch, first bridge arm are not controlled device valve group series aiding connection by two and are formed, second bridge arm
It does not control device valve group series aiding connection by other two to form, is provided with full-controlled device in the full-controlled device branch, described first
Two series connection points for not controlling device valve group of bridge arm be the power module input/output terminal, two of second bridge arm
The series connection point for not controlling device valve group is the input/output end of the power module；Device valve is not controlled in positive power module
Group in reversed power module do not control device valve group setting direction on the contrary, full-controlled device in positive power module with instead
To power module in full-controlled device setting direction it is opposite.
7. high voltage DC breaker according to claim 6, which is characterized in that do not control device for two in first bridge arm
RC is connected in the series aiding connection point of valve group and the second bridge arm between two series aiding connection points for not controlling device valve group and absorbs branch.
8. the high voltage DC breaker described according to claim 6 or 7, which is characterized in that the device valve group of not controlling is by one
Either the diode of at least two series aiding connections constitutes the full-controlled device branch and route one or at least two serial/parallel in the same direction
The full-controlled device of connection is constituted.
9. high voltage DC breaker according to claim 8, which is characterized in that the full-controlled device is IGBT.
10. high voltage DC breaker according to claim 7, which is characterized in that the RC absorptions branch circuit parallel connection has lightning-arrest
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810368462.7A CN108768184B (en) | 2018-04-23 | 2018-04-23 | Switch power unit and high-voltage direct-current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810368462.7A CN108768184B (en) | 2018-04-23 | 2018-04-23 | Switch power unit and high-voltage direct-current circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108768184A true CN108768184A (en) | 2018-11-06 |
| CN108768184B CN108768184B (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810368462.7A Active CN108768184B (en) | 2018-04-23 | 2018-04-23 | Switch power unit and high-voltage direct-current circuit breaker |
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| Publication number | Publication date |
|---|---|
| CN108768184B (en) | 2021-01-22 |
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