CN205647264U - Three level submodule pieces of MMC with direct current short -circuit current is from scavenging ability - Google Patents
Three level submodule pieces of MMC with direct current short -circuit current is from scavenging ability Download PDFInfo
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- CN205647264U CN205647264U CN201620498162.7U CN201620498162U CN205647264U CN 205647264 U CN205647264 U CN 205647264U CN 201620498162 U CN201620498162 U CN 201620498162U CN 205647264 U CN205647264 U CN 205647264U
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- switching tube
- current
- electric capacity
- mmc
- submodule
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Abstract
The utility model provides a three level submodule pieces of MMC with direct current short -circuit current is from scavenging ability can clear away the short -circuit fault electric current fast to avoid the action of alternating current circuit ware, improve system stability. The utility model relates to a three level submodule pieces of MMC with direct current short -circuit current is from scavenging ability mainly includes: switch tube 1, switch tube 2, switch tube 3, switch tube 4, electric capacity 1 and electric capacity 2, the switch tube is IGBT and anti -parallel diode. Be in normal during operation when the transverter, the utility model discloses three kinds of level voltages of three level submodule block outputs, its effect equate two half -bridge submodule pieces. Under the same level digital circuit pressure circumstances of output, compare with present half -bridge submodule piece, possess direct current short -circuit current from scavenging ability, to compare with full -bridge submodule piece, the nothing needs to increase the quantity of switch tube, reduces transverter cost and working loss.
Description
Technical field
The novel MMC inverter field that relates to of this use, a kind of MMC with direct-current short circuit electric current self-cleaning ability
Three level submodules.
Technical background
Along with the fast development of modern power electronics technology, based on modularization multi-level converter (Module
Multilevel Converter, MMC) D.C. high voltage transmission (High Voltage Direct Current, HVDC) system
Arise at the historic moment, by the extensive concern of society.MMC uses modular topological structure, has simple in construction simultaneously, is prone to expand
The a series of advantages such as exhibition, low harmonic content, low-loss, urban distribution network grid-connected in regenerative resource is powered and Asynchronous Communication electricity
The occasions such as net interconnection have huge application prospect.
Do not possess, in order to solve tradition MMC, the problem of direct-current short circuit current capacity removed, currently mainly propose two-way anti-the most also
Connection IGCT submodule, full-bridge submodule and clamper Shuangzi module.As it is shown in figure 1, two-way anti-parallel thyristor sub modular structure,
After DC Line Fault occurs, by the IGBT in locking submodule, simultaneously turn on two-way anti-parallel thyristor, direct-current short circuit is turned
Turn to ac short circuit, protect fly-wheel diode, it is achieved thereby that the Natural Attenuation of DC side fault current.But due to side circuit
Parameter is different, and easily break down current attenuation phenomenon slowly, and fault current self-cleaning effect is undesirable.Full-bridge submodule agllutination
Structure, although can effectively suppress short circuit current, but the number of devices used is the twice of conventional half-bridge type, economic benefit is relatively
Difference.Clamper Shuangzi module reduces power device quantity further, but compared with half-bridge submodule, number of devices is the most a lot.
Utility model content
This utility model provides a kind of MMC tri-level submodule with direct-current short circuit electric current self-cleaning ability, it is possible to
Quickly remove direct-current short circuit fault current, thus avoid AC circuit breaker action, improve the stability of system.
This utility model provides a kind of MMC tri-level submodule with direct-current short circuit electric current self-cleaning ability, including
Switching tube 1 (T1 and D1), switching tube 2 (T2 and D2), switching tube 3 (T3 and D3), switching tube 4 (T4 and D4), electric capacity 1 and electric capacity 2；
The voltage of electric capacity 1 is UC1, the voltage of electric capacity 2 is UC2；Described switching tube is IGBT and anti-paralleled diode；The transmitting of switching tube 1
Pole is connected with the colelctor electrode of switching tube 2, the connection of the positive pole of the colelctor electrode of switching tube 1 and electric capacity 1, the emitter stage of switching tube 2 with
The negative pole of electric capacity 2, the emitter stage of switching tube 4 connect, and the colelctor electrode of switching tube 4 is connected with the emitter stage of switching tube 3, electric capacity 1
Negative pole is connected with positive pole, the colelctor electrode of switching tube 3 of electric capacity 2.
Described MMC tri-level submodule, the emitter stage of switching tube 1, as the positive pole of three level submodule outfans, is opened
Closing the colelctor electrode negative pole as three level submodule outfans of pipe 4, output voltage is Uout, three level submodule input current i
Reference direction and described output voltage UoutReference direction identical, UC1=UC2=capacitance voltage rated value Ucref。
Described MMC tri-level submodule when normal work three kinds of level voltages of output (0, UcrefAnd 2Ucref), it is made
With two half-bridge submodules of equivalence.When an error occurs, all IGBT of locking, described MMC tri-level submodule output voltage
For-UcrefOr 2Ucref, thus reach the purpose of rapid locking fault current.
Compared with existing direct-current short circuit electric current self-cleaning submodule, advantage of the present utility model is: identical in output
Under level number voltage conditions, compared with two-in-parallel IGCT submodule, described MMC tri-level submodule can quickly remove event
Barrier electric current, and do not affected by side circuit parameter.Compared with full-bridge submodule and clamper Shuangzi module, described three level
Module, without increasing power device quantity, can realize direct-current short circuit fault current self-cleaning, and conducting switch in work process
Pipe number is few, is lost relatively low.
Accompanying drawing explanation
Fig. 1 (a), 1 (b) and 1 (c) are respectively two-way anti-parallel thyristor submodule, full-bridge submodule and clamper Shuangzi mould
Block topology.
Fig. 2 is a kind of MMC tri-level submodule topology with direct-current short circuit electric current self-cleaning ability of this utility model.
Fig. 3 (a), 3 (b) and 3 (c) are respectively a kind of MMC with direct-current short circuit electric current self-cleaning ability of this utility model
Under three level submodule limits 1,2,3 three kind of mode of operation.
Fig. 4 (a) and Fig. 4 (b) is respectively a kind of MMC tri-electricity with direct-current short circuit electric current self-cleaning ability of this utility model
Two mode of operations after flat submodular circuits locking.
Detailed description of the invention
For of the present utility model content and feature are expanded on further, it is embodied as of the present utility model below in conjunction with accompanying drawing
Mode illustrates, but enforcement of the present utility model is not limited to this.If there being not specified control process below, it is ability
Field technique personnel can refer to what existing control technology realized.
With reference to Fig. 2, described a kind of MMC tri-level submodule topology with direct-current short circuit electric current self-cleaning ability includes
Switching tube 1 (T1 and D1), switching tube 2 (T2 and D2), switching tube 3 (T3 and D3), switching tube 4 (T4 and D4), electric capacity 1 and electric capacity 2；
The voltage of electric capacity 1 is UC1, the voltage of electric capacity 2 is UC2；Described switching tube is IGBT and anti-paralleled diode；The transmitting of switching tube 1
Pole is connected with the colelctor electrode of switching tube 2, the connection of the positive pole of the colelctor electrode of switching tube 1 and electric capacity 1, the emitter stage of switching tube 2 with
The negative pole of electric capacity 2, the emitter stage of switching tube 4 connect, and the colelctor electrode of switching tube 4 is connected with the emitter stage of switching tube 3, electric capacity 1
Negative pole is connected with positive pole, the colelctor electrode of switching tube 3 of electric capacity 2.
The emitter stage of switching tube 1 is made as the positive pole of described MMC tri-level submodule outfan, the colelctor electrode of switching tube 4
For the negative pole of described MMC tri-level submodule outfan, output voltage is Uout, the reference side of three level submodule input current i
To with described output voltage UoutReference direction identical, UC1=UC2=capacitance voltage rated value Ucref。
With reference to Fig. 3, described a kind of MMC tri-level submodule topology with direct-current short circuit electric current self-cleaning ability has 3
Kind mode of operation:
Pattern 1: as shown in Fig. 3 (a), controls switching tube 2 and switching tube 4 turns on, and switching tube 1 and switching tube 3 turn off.Described
Submodule output voltage Uout=0.As described submodule input current i > 0, as shown in phantom in FIG., electric current i flows current path
IGBT and switching tube 4 anti-paralleled diode, electric capacity 1 and the electric capacity 2 of crossing switching tube 2 neither charge and do not discharge；When described submodule
< when 0, as shown by the solid line in the drawings, electric current i flows through anti-paralleled diode and the switching tube of switching tube 2 to current path to block input current i
The IGBT of 4, electric capacity 1 and electric capacity 2 neither charge and do not discharge.
Pattern 2: as shown in Fig. 3 (b), controls switching tube 1 and switching tube 3 turns on, and switching tube 2 and switching tube 4 turn off.Described
Submodule output voltage Uout=Ucref.As described submodule input current i > 0, current path as shown in phantom in FIG., electric current
I flows through anti-paralleled diode and the IGBT of switching tube 3 of switching tube 1, charges to electric capacity 1, and electric capacity 2 neither charges and do not discharges；
As described submodule input current i, < when 0, as shown by the solid line in the drawings, electric current i flows through IGBT and the switch of switching tube 1 to current path
The anti-paralleled diode of pipe 3, discharges to electric capacity 1, and electric capacity 2 neither charges and do not discharges.
Pattern 3: as shown in Fig. 3 (c), controls switching tube 1 and switching tube 4 turns on, and switching tube 2 and switching tube 3 turn off.Described
Submodule output voltage Uout=2Ucref.As described submodule input current i > 0, current path is as shown in phantom in FIG., electric
Stream i flows through switching tube 1 and the anti-paralleled diode of switching tube 4, charges to electric capacity 1 and electric capacity 2；When described submodule input current
< when 0, as shown by the solid line in the drawings, electric current i flows through switching tube 1 and the IGBT of switching tube 4 to current path to i, puts to electric capacity 1 and electric capacity 2
Electricity.
When controller detects direct-current short circuit fault-signal, all IGBT of locking MMC, described one has direct-current short circuit electricity
The MMC tri-level submodule of stream self-cleaning ability has two fault modes.
Fault mode 1: group blocks current i > 0 time, shown in current path such as Fig. 4 (a), flow through switching tube 1 and switching tube 4
Anti-paralleled diode, charge to electric capacity 1 and electric capacity 2, described submodule output voltage Uout=2Ucref。
Fault mode 2: group blocks current i < when 0, shown in current path such as Fig. 4 (b), flows through switching tube 2 and switching tube 3
Anti-paralleled diode, charge to electric capacity 2, described submodule output voltage Uout=-Ucref。
Visible, when an error occurs, all IGBT of locking, regardless of bridge arm current direction, all can be to described submodule
Electric capacity is charged, thus reaches the purpose of quick lock fault current.
Above-described embodiment is this utility model preferably embodiment, but embodiment of the present utility model is not by described
Embodiment limits, other any without departing from spirit of the present utility model and the change made under principle, modify, replace
In generation, combine, simplify, all should be the substitute mode of equivalence, be included in protection domain of the present utility model.
Claims (3)
1. a MMC tri-level submodule with direct-current short circuit electric current self-cleaning ability, it is characterised in that include switching tube 1
(T1 and D1), switching tube 2 (T2 and D2), switching tube 3 (T3 and D3), switching tube 4 (T4 and D4), electric capacity 1 and electric capacity 2；Electric capacity 1
Voltage is UC1, the voltage of electric capacity 2 is UC2；Described switching tube is IGBT and anti-paralleled diode；The emitter stage of switching tube 1 with open
The colelctor electrode closing pipe 2 connects, the connection of the positive pole of the colelctor electrode of switching tube 1 and electric capacity 1, the emitter stage of switching tube 2 and electric capacity 2
Negative pole, the emitter stage of switching tube 4 connect, and the colelctor electrode of switching tube 4 is connected with the emitter stage of switching tube 3, the negative pole of electric capacity 1 and electricity
Hold the positive pole of 2, the colelctor electrode of switching tube 3 connects.
A kind of MMC tri-level submodule with direct-current short circuit electric current self-cleaning ability the most according to claim 1, it is special
Levy and be: the emitter stage of switching tube 1 is as the positive pole of described three level submodule outfans, and the colelctor electrode of switching tube 4 is as institute
Stating the negative pole of three level submodule outfans, output voltage is Uout, the reference direction of described three level submodule input current i
With described output voltage UoutReference direction identical.
A kind of MMC tri-level submodule with direct-current short circuit electric current self-cleaning ability the most according to claim 1, it is special
Levy and be: UC1=UC2=capacitance voltage rated value Ucref。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620498162.7U CN205647264U (en) | 2016-05-26 | 2016-05-26 | Three level submodule pieces of MMC with direct current short -circuit current is from scavenging ability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620498162.7U CN205647264U (en) | 2016-05-26 | 2016-05-26 | Three level submodule pieces of MMC with direct current short -circuit current is from scavenging ability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205647264U true CN205647264U (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620498162.7U Expired - Fee Related CN205647264U (en) | 2016-05-26 | 2016-05-26 | Three level submodule pieces of MMC with direct current short -circuit current is from scavenging ability |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877718A (en) * | 2017-04-21 | 2017-06-20 | 上海交通大学 | The asymmetric Shuangzi module midpoint potential balance control method of modularization multi-level converter |
| CN107359590A (en) * | 2017-07-31 | 2017-11-17 | 湖北工业大学 | A kind of direct current network short circuit current blocks circuit |
| CN107508267A (en) * | 2017-09-20 | 2017-12-22 | 国家电网公司 | A kind of modularization multi-level converter of voltage source converter submodule unit and its composition |
| CN114024458A (en) * | 2021-11-08 | 2022-02-08 | 华北电力大学（保定） | Capacitor voltage balance control method and current converter |
-
2016
- 2016-05-26 CN CN201620498162.7U patent/CN205647264U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877718A (en) * | 2017-04-21 | 2017-06-20 | 上海交通大学 | The asymmetric Shuangzi module midpoint potential balance control method of modularization multi-level converter |
| CN107359590A (en) * | 2017-07-31 | 2017-11-17 | 湖北工业大学 | A kind of direct current network short circuit current blocks circuit |
| CN107508267A (en) * | 2017-09-20 | 2017-12-22 | 国家电网公司 | A kind of modularization multi-level converter of voltage source converter submodule unit and its composition |
| CN114024458A (en) * | 2021-11-08 | 2022-02-08 | 华北电力大学（保定） | Capacitor voltage balance control method and current converter |
| CN114024458B (en) * | 2021-11-08 | 2023-10-10 | 华北电力大学（保定） | Capacitor voltage balance control method and converter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20170526 |