CN103825482A - Combined high-voltage converter formed by serially connecting three-phase four-wire bridge type module units - Google Patents
Combined high-voltage converter formed by serially connecting three-phase four-wire bridge type module units Download PDFInfo
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- CN103825482A CN103825482A CN201410073339.4A CN201410073339A CN103825482A CN 103825482 A CN103825482 A CN 103825482A CN 201410073339 A CN201410073339 A CN 201410073339A CN 103825482 A CN103825482 A CN 103825482A
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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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
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Abstract
The invention provides a combined high-voltage converter formed by serially connecting three-phase four-wire bridge type module units. The combined high-voltage converter comprises 2N three-phase four-wire bridge type module units and eight bridge arm inductors. An upper bridge arm of the three-phase four-wire high-voltage converter is formed by serially connecting N three-phase four-wire bridge type module units and then correspondingly serially connecting the connected N three-phase four-wire bridge type module units with one ends of four bridge arm inductors, a lower bridge arm is formed by sequentially and serially connecting one ends of the other four bridge arm inductors and the other N three-phase four-wire bridge type module units, then other ends of the four bridge arm inductors of the upper bridge arm and the other ends of the four bridge arm inductors of the lower bridge arm are in serial connection, four connection points between the four bridge arm inductors of the upper bridge arm and the other four bridge arm inductors of the lower bridge arm form output ends of bridge arms of corresponding phases, the connection points of the inductors of the upper bridge arm and the inductors of the lower bridge arm form alternating-current output ends and mid-lines of the bridge arms of the corresponding phase, the alternating-current output ends are connected with the load of a three-phase Y-connection load, and the mid-lines are connected with the middle point of the three-phase Y-connection load. By means of the combined high-voltage converter, components are reduced, the number of power units is reduced, combination is simple, and reliability is higher.
Description
Technical field
The invention belongs to converters or high voltage applications field, relate to the structure of three-phase and four-line bridge-type modular unit tandem compound high tension transformer topology.
Background technology
Realizing one of key technology of high-voltage high-power converter is high power converter topology, in the world high-voltage large-capacity converter is conducted in-depth research in recent decades, has proposed numerous significant high-voltage large-capacity topologys.The topological technology of main structure comprises: 1, the direct serial connection technology of device for power switching, its advantage is directly to apply existing topology, shortcoming is that each power switching device series exists Static and dynamic voltage-sharing, to device for power switching to turn on and off coherence request higher, be easy to occur device fault; 2, multiple technology, its advantage is that traditional H bridge or three-phase bridge circuit are coupled by many windings Industrial Frequency Transformer, realizes high voltage, low harmonic wave, and shortcoming is to use power frequency multi winding transformer, cost, loss, complexity increase, and have DC magnetization phenomenon; 3, multilevel converter, its advantage is that DC side adopts series direct current electric capacity to realize device for power switching all to press, shortcoming is that the On current load of device for power switching is inconsistent, cause the imbalance of direct voltage on each DC capacitor, and topology is more complicated; 4, module combination multi-level converter is MMC converter; its advantage is that each phase brachium pontis is according to electric pressure; be followed in series to form by multiple identical modular power units and two brachium pontis inductance; realize high modularization; having more obvious advantage at aspects such as device current stress, unbalanced operation, error protections than general multilevel converter, is that current high voltage electric energy converts first-selected converter.
The present invention, on MMC converter basis, proposes the three-phase and four-line bridge-type modular unit tandem compound high tension transformer that a kind of degree of modularity is higher.
Summary of the invention
The present invention proposes a kind of three-phase and four-line bridge-type modular unit tandem compound high tension transformer, with the comparison of existing high-voltage large-capacity converter, the degree of modularity is higher, components and parts are reduced, reduced power cell number, combination is simple, and reliability is higher, and cost declines, and in high-voltage large-capacity commercial Application, holds out broad prospects.The present invention is achieved through the following technical solutions.
Three-phase and four-line bridge-type modular unit tandem compound high tension transformer, it comprises 2N three-phase and four-line bridge-type modular unit and 8 brachium pontis inductance, wherein the upper brachium pontis of three-phase and four-line high tension transformer is corresponding in series with one end 4 brachium pontis inductance again after being connected by N three-phase and four-line bridge-type modular unit, lower brachium pontis is followed in series to form with other N three-phase and four-line bridge-type modular unit by one end of other 4 brachium pontis inductance, then go up the other end of 4 brachium pontis inductance of brachium pontis and the other end of 4 brachium pontis inductance of lower brachium pontis is connected, 4 brachium pontis inductance of upper brachium pontis and 4 tie points between 4 brachium pontis inductance of lower brachium pontis form the output of corresponding phase brachium pontis, N is positive integer.
Further, by 8, the power switch component with fly-wheel diode and 1 DC capacitor form described three-phase and four-line bridge-type modular unit.
Further, in described three-phase and four-line bridge-type modular unit, every 2 power switch components 1 phase in series, 8 power switch components form 4 phases altogether, be a phase, b phase, c phase and o phase, wherein every 1 all comprises the first switching tube and second switch pipe mutually separately, and the two ends of the first switching tube and second switch pipe are all connected with fly-wheel diode, are respectively the first fly-wheel diode and the second fly-wheel diode; The positive pole of the first switching tube is received A end, and negative pole is received B end; The positive pole of second switch pipe is received B end, and negative pole is received C end, and wherein B end, C end are output.Then the A of a phase, b phase, c phase and o phase end interconnects, and selection o is that the A of center line phase holds the positive pole, the C that receive DC capacitor to hold the negative pole of receiving DC capacitor, the voltage E=V/2N on DC capacitor, the magnitude of voltage that V is input DC power mutually.
Further, three-phase and four-line bridge-type modular unit comprises 2 kinds of operating states, and the first state is the first switching tube or the first fly-wheel diode conducting, and other device all turn-offs; The second state is second switch pipe or the second fly-wheel diode conducting, and other device all turn-offs.
Further, the upper brachium pontis of three-phase and four-line high tension transformer is connected in series three-phase and four-line bridge-type modular unit by N and 4 brachium pontis inductance connect and compose, and the B of the every phase of first three-phase and four-line bridge-type modular unit end is U
a1, U
b1, U
c1, U
o1be connected with the positive pole of power supply, the C end of the every phase of first three-phase and four-line bridge-type modular unit is U with the B end of second three-phase and four-line bridge-type modular unit phase homophase
a2, U
b2, U
c2, U
o2be connected, connect according to this rule, the U of i three-phase and four-line bridge-type modular unit
ai, U
bi, U
ci, U
oibe connected respectively to the C end of i-1 three-phase and four-line bridge-type modular unit phase homophase, the B end that the C end of i the every phase of three-phase and four-line bridge-type modular unit is connected respectively to i+1 three-phase and four-line bridge-type modular unit phase homophase is U
a (i+1), U
b (i+1), U
c (i+1), U
o (i+1), after N three-phase and four-line bridge-type modular unit connects, the C end of N the every phase of three-phase and four-line bridge-type modular unit is connected with the first inductance, the second inductance, the 3rd inductance and the 4th inductance respectively.
Further, the lower brachium pontis of three-phase and four-line high tension transformer is connected and composed successively by 4 brachium pontis inductance and N the three-phase and four-line bridge-type modular unit being connected in series, the 5th inductance, the 6th inductance, the 7th inductance and the 8th inductance (L
on) be U with the B end of N+1 the every phase of three-phase and four-line bridge-type modular unit respectively
a (N+1), U
b (N+1), U
c (N+1), U
o (N+1)be connected, the C end of N+1 the every phase of three-phase and four-line bridge-type modular unit is U with the B end of N+2 three-phase and four-line bridge-type modular unit phase homophase
a (N+2), U
b (N+2), U
c (N+2), U
o (N+2)be connected, rule according to this, after N three-phase and four-line bridge-type modular unit connects, the C end of 2N the every phase of three-phase and four-line bridge-type modular unit is a
-, b
-, c
-, o
-end is connected to the negative pole of power supply.
Further, three-phase and four-line high tension transformer is that draw at a, b, c, o point place at the tie point of upper and lower bridge arm inductance, and wherein a, b, c point are connected to the load of three-phase Y-connection, and o point is connected to load mid point.
The present invention is compared with MMC converter, and tool has the following advantages and technique effect: 1, modular power unit is different, MMC converter using uniphase mode blocking power cell, and the present invention adopts three-phase and four-line bridge-type modular unit; 2, compound mode difference, MMC converter is after uniphase mode blocking power unit cascade combination, combined repeatedly, and the present invention to be the series connection of three-phase and four-line bridge-type modular power unit once combined.Thereby the present invention compares with MMC converter, there is following significant advantage: 1, reduced components and parts; 2, the degree of modularity is higher; 3, combination is simple; 4, reliability is high; 5, cost declines.
Accompanying drawing explanation
Fig. 1 is the three-phase and four-line bridge-type modular unit structure chart that forms high tension transformer.
Fig. 2 is three-phase and four-line bridge-type modular unit tandem compound high tension transformer main circuit diagram of the present invention.
Fig. 3 is the three-phase and four-line bridge-type modular unit tandem compound high tension transformer structure chart with 2N=4 module.
Fig. 4 is the 3 level output voltage waveforms while adopting multilevel with the three-phase and four-line bridge-type modular unit tandem compound high tension transformer of 2N=4 module.
Fig. 5 is the 4 level output voltage waveforms while adopting multilevel with the three-phase and four-line bridge-type modular unit tandem compound high tension transformer of 2N=4 module.
Specific embodiments
Below in conjunction with accompanying drawing, specific embodiment of the invention is further described.
Shown in Fig. 1 is three-phase and four-line bridge-type modular unit of the present invention, and by 8, the power switch component with fly-wheel diode and 1 DC capacitor form three-phase and four-line bridge-type modular unit.Wherein every 2 power switch components 1 phase in series, 8 power switch components form 4 phases altogether, i.e. a phase, b phase, c phase and o phase, every 1 all comprises the first switch transistor T mutually separately
1with second switch pipe T
2, the first switch transistor T
1positive pole receive A end, negative pole is received B end, second switch pipe T
2positive pole receive B end, negative pole is received C end, wherein B end, C end are output.Then the A of a phase, b phase, c phase and o phase end interconnects, and selection o is that the A end of center line phase is received DC capacitor C mutually
epositive pole, C end receive DC capacitor C
enegative pole, DC capacitor C
eon voltage E=V/2N, the magnitude of voltage that V is input DC power.
According to the three-phase and four-line bridge-type modular unit structure of Fig. 1, comprise 2 kinds of operating states, the first state is the first switching tube or the first fly-wheel diode conducting, other device all turn-offs; The second state is second switch pipe or the second fly-wheel diode conducting, and other device all turn-offs.
Three-phase and four-line bridge-type modular unit tandem compound high tension transformer constituted mode shown in Fig. 2 is as follows: 1, the upper brachium pontis of three-phase and four-line high tension transformer is connected and composed by N three-phase and four-line bridge-type modular unit and 4 the brachium pontis inductance that are connected in series, i.e. first three-phase and four-line bridge-type modular unit M
1the B end of every phase is U
a1, U
b1, U
c1, U
o1be connected with the positive pole of power supply V, first three-phase and four-line bridge-type modular unit M
1c end and second three-phase and four-line bridge-type modular unit M of every phase
2the B end of phase homophase is U
a2, U
b2, U
c2, U
o2be connected, connect according to this rule, i three-phase and four-line bridge-type modular unit M
ithe B end of every phase is U
ai, U
bi, U
ci, U
oibe connected respectively to i-1 three-phase and four-line bridge-type modular unit M
i-1the C end of phase homophase, i three-phase and four-line bridge-type modular unit M
ithe C end of every phase is connected respectively to i+1 three-phase and four-line bridge-type modular unit M
i+1the B end of phase homophase is U
a (i+1), U
b (i+1), U
c (i+1), U
o (i+1), after N three-phase and four-line bridge-type modular unit connects, N three-phase and four-line bridge-type modular unit M
nthe C end of every phase respectively with the first inductance L
ap, the second inductance L
bp, the 3rd inductance L
cpwith the 4th inductance L
opconnect; 2, the lower brachium pontis of three-phase and four-line high tension transformer is connected and composed by 4 brachium pontis inductance and N the three-phase and four-line bridge-type modular unit being connected in series, the 5th inductance L
an, the 6th inductance L
bn, the 7th inductance L
cnwith the 8th inductance L
onrespectively with N+1 three-phase and four-line bridge-type modular unit M
n+1the B end of every phase is U
a (N+1), U
b (N+1), U
c (N+1), U
o (N+1)be connected, N+1 three-phase and four-line bridge-type modular unit M
n+1c end and N+2 the three-phase and four-line bridge-type modular unit M of every phase
n+2the B end of phase homophase is U
a (N+2), U
b (N+2), U
c (N+2), U
o (N+2)be connected, rule according to this, after N three-phase and four-line bridge-type modular unit connects, 2N three-phase and four-line bridge-type modular unit M
2Nthe C end of every phase is a
-, b
-, c
-, o
-end is connected to the negative pole of power supply V, is configured to lower brachium pontis; 3, three-phase and four-line high tension transformer is that draw at a, b, c, o point place at the tie point of upper and lower bridge arm inductance, and wherein a, b, c point are connected to the load of three-phase Y-connection, and o point is connected to load mid point.
Fig. 3 is a three-phase and four-line bridge-type modular unit tandem compound high tension transformer with 2N=4 module, and it is by 4 three-phase and four-line bridge-type module M
1, M
2, M
3, M
4and 8 brachium pontis inductance that inductance value is identical
lform.Adopt Multilevel modulation strategy adjustment center line phase voltage V
o, can realize threephase load voltage V
ao, V
bo, V
comany level output, wherein two kinds of different voltage with multiple levels waveforms are shown in Figure 4 and 5.
Claims (7)
1. a three-phase and four-line bridge-type modular unit tandem compound high tension transformer, it is characterized in that comprising 2N three-phase and four-line bridge-type modular unit and 8 brachium pontis inductance, wherein the upper brachium pontis of high tension transformer is corresponding in series with one end 4 brachium pontis inductance again after being connected by N three-phase and four-line bridge-type modular unit, lower brachium pontis is followed in series to form with other N three-phase and four-line bridge-type modular unit by one end of other 4 brachium pontis inductance, then go up the other end of 4 brachium pontis inductance of brachium pontis and the other end of 4 brachium pontis inductance of lower brachium pontis is connected, 4 brachium pontis inductance of upper brachium pontis and 4 tie points between 4 brachium pontis inductance of lower brachium pontis form the output of corresponding phase brachium pontis, N is positive integer.
2. three-phase and four-line bridge-type modular unit tandem compound high tension transformer according to claim 1, is characterized in that, by 8, the power switch component with fly-wheel diode and 1 DC capacitor form described three-phase and four-line bridge-type modular unit.
3. three-phase and four-line bridge-type modular unit tandem compound high tension transformer according to claim 2, it is characterized in that, in described three-phase and four-line bridge-type modular unit, every 2 power switch components 1 phase in series, 8 power switch components form 4 phases altogether, be a phase, b phase, c phase and o phase, wherein every 1 all comprises the first switching tube (T mutually separately
1) and second switch pipe (T
2), the first switching tube (T
1) and second switch pipe (T
2) two ends be all connected with fly-wheel diode, be respectively the first fly-wheel diode (D
1) and the second fly-wheel diode (D
2); The first switching tube (T
1) positive pole receive A end, negative pole is received B end, second switch pipe (T
2) positive pole receive B end, negative pole is received C end, wherein B end, C end are output; Then the A of a phase, b phase, c phase and o phase end interconnects, and selection o is that the A end of center line phase is received DC capacitor (C mutually
e) positive pole, C end receive DC capacitor (C
e) negative pole, DC capacitor (C
e) on voltage E=V/2N, the magnitude of voltage that V is input DC power.
4. three-phase and four-line bridge-type modular unit tandem compound high tension transformer according to claim 3, is characterized in that, three-phase and four-line bridge-type modular unit comprises 2 kinds of operating states, and the first state is the first switching tube (T
1) or the first fly-wheel diode (D
1) conducting, other device all turn-offs; The second state is second switch pipe (T
2) or the second fly-wheel diode (D
2) conducting, other device all turn-offs.
5. three-phase and four-line bridge-type modular unit tandem compound high tension transformer according to claim 3, it is characterized in that, the upper brachium pontis of high tension transformer is connected and composed by N three-phase and four-line bridge-type modular unit and 4 the brachium pontis inductance that are connected in series, i.e. first three-phase and four-line bridge-type modular unit (M
1) the B end of every phase is U
a1, U
b1, U
c1, U
o1be connected with the positive pole of power supply (V), first three-phase and four-line bridge-type modular unit (M
1) C end and second three-phase and four-line bridge-type modular unit (M of every phase
2) the B end of phase homophase is U
a2, U
b2, U
c2, U
o2be connected, connect according to this rule, i three-phase and four-line bridge-type modular unit (M
i) the B end U of every phase
ai, U
bi, U
ci, U
oibe connected respectively to i-1 three-phase and four-line bridge-type modular unit (M
i-1) the C end of phase homophase, i three-phase and four-line bridge-type modular unit (M
i) the C end of every phase is connected respectively to i+1 three-phase and four-line bridge-type modular unit (M
i+1) the B end of phase homophase is U
a (i+1), U
b (i+1), U
c (i+1), U
o (i+1), after N three-phase and four-line bridge-type modular unit connects, N three-phase and four-line bridge-type modular unit (M
n) every phase C end respectively with the first inductance (L
ap), the second inductance (L
bp), the 3rd inductance (L
cp) and the 4th inductance (L
op) connect.
6. three-phase and four-line bridge-type modular unit tandem compound high tension transformer according to claim 3, it is characterized in that, the lower brachium pontis of three-phase and four-line high tension transformer is connected and composed by 4 brachium pontis inductance and N the three-phase and four-line bridge-type modular unit being connected in series, wherein the 5th inductance (L
an), the 6th inductance (L
bn), the 7th inductance (L
cn) and the 8th inductance (L
on) respectively with N+1 three-phase and four-line bridge-type modular unit (M
n+1) the B end of every phase is U
a (N+1), U
b (N+1), U
c (N+1), U
o (N+1)be connected, N+1 three-phase and four-line bridge-type modular unit (M
n+1) C end and N+2 the three-phase and four-line bridge-type modular unit (M of every phase
n+2) the B end of phase homophase is U
a (N+2), U
b (N+2), U
c (N+2), U
o (N+2)be connected, rule according to this, after N three-phase and four-line bridge-type modular unit connects, 2N three-phase and four-line bridge-type modular unit (M
2N) the C end of every phase is a
-, b
-, c
-, o
-end is connected to the negative pole of power supply (V), is configured to lower brachium pontis.
7. three-phase and four-line bridge-type modular unit tandem compound high tension transformer according to claim 3, it is characterized in that, three-phase and four-line high tension transformer is that draw at a, b, c, o point place at the tie point of upper and lower bridge arm inductance, wherein a, b, c point are connected to the load of three-phase Y-connection, and o point is connected to load mid point.
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|---|---|---|---|
| CN201410073339.4A CN103825482B (en) | 2014-02-28 | 2014-02-28 | Three-phase and four-line bridge-type modular unit tandem compound high tension transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410073339.4A CN103825482B (en) | 2014-02-28 | 2014-02-28 | Three-phase and four-line bridge-type modular unit tandem compound high tension transformer |
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| CN103825482A true CN103825482A (en) | 2014-05-28 |
| CN103825482B CN103825482B (en) | 2016-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024051217A1 (en) * | 2022-09-06 | 2024-03-14 | 南方电网调峰调频发电有限公司储能科研院 | Battery energy storage circuit and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546964A (en) * | 2009-05-12 | 2009-09-30 | 北京交通大学 | Module combined multi-level converter |
| CN102097967A (en) * | 2010-12-10 | 2011-06-15 | 清华大学 | Cascaded multi-level converter |
| CN202872650U (en) * | 2012-07-10 | 2013-04-10 | 辽宁荣信电气传动技术有限责任公司 | H-bridge-based high-voltage stabilized power supply |
| CN203747683U (en) * | 2014-02-28 | 2014-07-30 | 华南理工大学 | Three-phase four-wire bridge-type modular unit series combination high-voltage transformer |
-
2014
- 2014-02-28 CN CN201410073339.4A patent/CN103825482B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546964A (en) * | 2009-05-12 | 2009-09-30 | 北京交通大学 | Module combined multi-level converter |
| CN102097967A (en) * | 2010-12-10 | 2011-06-15 | 清华大学 | Cascaded multi-level converter |
| CN202872650U (en) * | 2012-07-10 | 2013-04-10 | 辽宁荣信电气传动技术有限责任公司 | H-bridge-based high-voltage stabilized power supply |
| CN203747683U (en) * | 2014-02-28 | 2014-07-30 | 华南理工大学 | Three-phase four-wire bridge-type modular unit series combination high-voltage transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024051217A1 (en) * | 2022-09-06 | 2024-03-14 | 南方电网调峰调频发电有限公司储能科研院 | Battery energy storage circuit and system |
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|---|---|
| CN103825482B (en) | 2016-08-17 |
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