CN104980137B - A kind of all solid state high speed d-c circuit breaker of forced commutation type and commutation switch - Google Patents
A kind of all solid state high speed d-c circuit breaker of forced commutation type and commutation switch Download PDFInfo
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- CN104980137B CN104980137B CN201510315026.XA CN201510315026A CN104980137B CN 104980137 B CN104980137 B CN 104980137B CN 201510315026 A CN201510315026 A CN 201510315026A CN 104980137 B CN104980137 B CN 104980137B
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Abstract
The present invention relates to a kind of all solid state high speed d-c circuit breaker of forced commutation type and commutation switch, the all solid state high speed d-c circuit breaker of forced commutation type includes change of current branch in parallel and main electronic switch branch, and the change of current branch route solid-state switch and commutation switch are composed in series；The commutation switch is made of bridge-type MMC sub-module cascades, is either made of semi-bridge type MMC sub-module cascades or is made of bridge-type MMC submodules with semi-bridge type MMC submodules according to setting number, concatenated in order.The all solid state High-speed DC short-circuiting device of forced commutation type proposed by the present invention is easily achieved with topological structure, and control is flexible, and turn-off speed is fast, and loss is small and has preferable Technical Economy.
Description
Technical field
The present invention relates to high-power electric and electronic technical field, and in particular to a kind of all solid state High-speed DC of forced commutation type
Breaker and its commutation switch.
Background technology
In recent years, with the continuous development of China's economy and science and technology, the demand of the energy is also increasingly increased.Effectively to solve
The energy skewness problem in China, HVDC Transmission Technology currently become a kind of effective means.Especially flexible direct current
The gradual ripe distributed new that even more promotes of technology of transmission of electricity develops.Since forthright system is fireballing with fault progression
Characteristic, especially for the flexible direct current power transmission system based on IGBT device, due to there are anti-paralleled diode, when DC side is sent out
, can not quick limiting short-circuit current during raw failure.Therefore the research of dc circuit breaker has for the stability of DC transmission system
Important meaning.
At present, solid-state direct-current breaker is generally realized to electric current using half control type or full-control type power electronic switching device
Switching controls, and has the advantages that the accurate controllable, long lifespan of the quick silent of non-contact, switching, switching time, but there are electric power
The deficiencies of electronic switching device easy over-voltage and over-current part.
Such as Chinese patent literature《A kind of all solid state dc circuit breaker and its control method》(103997322 A of CN) is carried
A kind of solid-state direct-current Circuit breaker technology gone out.What the program was made of by setting reverse parallel connection thyristor and differential concatenation IGBT
Change of current branch, the cutout branch being made of the IGBT for the multiple differential concatenations connected.In normal work, DC current is by the change of current
Branch flows through, and when failure, the switch on and off of each current path is controlled, the electric current for flowing through change of current branch is transformed into cutout branch
Lu Shang, realizes the shut-off to fault current.
Program commutation switch uses this structures of the IGBT of differential concatenation, in the pass of commutation switch under fault condition
It is higher to the coherence request of IGBT shut-offs during disconnected, realize that difficulty is big in engineering；The solid-state in commutation switch is opened at the same time
Pass does not have backward voltage in turn off process, and thyristor turn off process is relatively slow, and electric current reduces in solid-state switch
Thyristor indeed is not in off-state after being zero (in other words without the positive resistance state of recovery).
The content of the invention
The object of the present invention is to provide a kind of all solid state high speed d-c circuit breaker of forced commutation type, to solve the prior art
The defects of coherence request that middle dc circuit breaker turns off IGBT is high.Further, present invention also offers straight applied to this
The commutation switch of breaker is flowed, is that the core of dc circuit breaker is improved.
To achieve the above object, the solution of the present invention includes：
A kind of all solid state high speed d-c circuit breaker of forced commutation type, including change of current branch in parallel and main electronic switch branch
Road, the change of current branch route solid-state switch and commutation switch are composed in series；The commutation switch is by bridge-type MMC sub-module cascades
Composition, be either made of semi-bridge type MMC sub-module cascades or by bridge-type MMC submodules and semi-bridge type MMC submodules according to
Set number, concatenated in order composition.
At least one main electronic switch unit of main electronic switch branch route is in series, and main electronic switch unit is by reversely going here and there
The full-controlled switch device composition of connection.
The solid-state switch is made of the thyristor of at least one set of reverse parallel connection, is gone here and there between the thyristor of multigroup reverse parallel connection
Connection.
The full-controlled switch device is IGBT.
The dc circuit breaker further includes at least one arrester, and the arrester is connected in parallel on the change of current branch and main electricity
On the correspondence branch or element of sub switch branch.
Present invention also offers a kind of commutation switch for dc circuit breaker, the commutation switch is by bridge-type MMC
Module-cascade forms, and is either made of or by bridge-type MMC submodules and semi-bridge type MMC semi-bridge type MMC sub-module cascades
Module is formed according to setting number, concatenated in order.
Commutation switch is arranged to full-bridge MMC submodules, half-bridge MMC submodules or full-bridge MMC and half-bridge MMC mixes submodule
Block, can provide the backward voltage needed for shut-off for thyristor；The turn-off time of solid switch is very small, and fault current can be rapid
Main electronic switch branch is transferred to, main electronic switch unit is composed in series using reversal connection IGBT, and fault current can be rapid after shut-off
Reduce.The all solid state High-speed DC short-circuiting device of forced commutation type proposed by the present invention is easily achieved with topological structure, and control is flexible,
Turn-off speed is fast, and loss is small and has preferable Technical Economy.
Main electronic switch unit is composed in series using reversal connection IGBT, and fault current can reduce rapidly after shut-off；Thyristor has
There is the characteristic of high-voltage large current, breaker is suitable for high-capacity direct current transmission of electricity occasion.
Brief description of the drawings
Fig. 1 is all solid state high speed d-c circuit breaker topological structure of forced commutation type；
Fig. 2 is the control logic in all solid state high speed d-c circuit breaker turn off process of forced commutation type；
The working status of all solid state high speed d-c circuit breaker of forced commutation type when Fig. 3 is up；
Fig. 4 is the commutation course of all solid state high speed d-c circuit breaker embodiment of forced commutation type；
Fig. 5 is the working status of breaker embodiment in main electronic switch branch turn off process；
Fig. 6 is the current waveform in all solid state high speed d-c circuit breaker embodiment disconnection process of forced commutation type.
Embodiment
Dc circuit breaker embodiment
As shown in Figure 1, all solid state high speed d-c circuit breaker of forced commutation type by change of current branch and main electronic switch branch simultaneously
Connection composition.Change of current branch route solid-state switch and commutation switch is composed in series；Main electronic switch branch route at least one main electronic cutting
Pass unit is in series, and main electronic switch unit is the full-controlled switch device of differential concatenation.Solid-state switch is by least one set of anti-
Form to thyristor in parallel, connect between the thyristor of multigroup reverse parallel connection.
MMC submodules in commutation switch have three kinds of structures：Full-bridge MMC sub-modular structures, half-bridge MMC sub-modular structures,
And some bridge-type MMC submodules and some semi-bridge type MMC submodules are according to setting number, the structure being sequentially combined.
Wherein, some bridge-type MMC submodules and some semi-bridge type MMC submodules according to setting number, sequentially carry out group
Close, including a variety of situations, a full-bridge submodule as shown in Figure 1 and a half-bridge sub-module cascade, or two full-bridges
Submodule cascades successively with a half-bridge submodule, then an either full-bridge submodule and two half-bridge submodules level successively
Connection.
In the present embodiment, commutation switch is made of full-bridge MMC sub-module cascades.
The solid-state switch unit of change of current branch uses thyristor in the present embodiment.
Full-controlled switch device used in main electronic switch branch is IGBT in the present embodiment, as other embodiment party
Formula, can also select other full-controlled switch devices, such as GTO, IGCT etc. according to breaker concrete application occasion.
As shown in figure 3, in each differential concatenation IGBT both ends lightning arrester connected in parallel of main electronic switch, for protecting main electronic cutting
Close IGBT in unit and absorb the energy in breaker., can also be by an arrester and whole master as other embodiment
Electronic switch unit is in parallel, either by arrester and commutation switch, solid-state switch, change of current branch or with above-mentioned switch, road
In element in parallel.
It is the control logic in all solid state high-speed circuit breaker disconnection process of forced commutation type shown in Fig. 2.Wherein solid-state is opened
Central Shanxi Plain thyristor belongs to half control type device, its shut-off is uncontrollable, relies primarily on circuit characteristic and turns off naturally.
During normal operation, main electronic switch is off state, and commutation switch and solid-state switch are in the conduction state, circuit
In DC current flowed through from the change of current branch of breaker.
After failure occurs, that is, t0At the moment, turn off the IGBT of whole submodules in commutation switch, submodule electricity in the block first
Appearance starts to charge up, and capacitance voltage gradually rises.Then the IGBT of all switch elements in main electronic switch branch is triggered.Two groups are opened
Certain time delay is reserved in the IGBT action process of pass, such as the t in Fig. 20~t1。
After main electronic switch unit triggering and conducting, main electronic switch branch resistance is very small, while thyristor both ends are anti-
To voltage, therefore electric current is transferred to main electronic switch branch from change of current branch rapidly, and the electric current on change of current branch quickly drops to zero,
Such as 2 t described in figure1~t2。
Electric current on change of current branch drops to after zero, it is necessary to reserve enough turn-off times (blow-out angle) to thyristor, so
The IGBT of all switch elements in main electronic switch branch is turned off afterwards, such as the t in figure2~t3。
The working status of all solid state high speed d-c circuit breaker of forced commutation type when Fig. 3 show normal operation.
During normal operation, the IGBT of commutation switch submodule is in the conduction state in change of current branch, brilliant lock in solid-state switch
Pipe is also at conducting state；DC current is flowed through from change of current branch, at the IGBT of main all switch elements of electronic switch branch
In off state, no electric current flows through.
Fig. 4 show all solid state high speed d-c circuit breaker commutation course of forced commutation type.
When DC circuit failure, it is necessary to when breaker disconnects, whole submodules in commutation switch are turned off first
IGBT, fault current charge sub- module capacitance by the anti-paralleled diode of submodule IGBT；When capacitance reaches certain
During value, the IGBT of all convertor units in the main electronic switch branch of triggering and conducting.
The voltage U at thyristor both endsT<0, i.e., thyristor both ends are backward voltages at this time, the electric current I on change of current branchd1Open
Beginning is quickly decreased to zero；Electric current I in main electronic switch branchd2Increase sharply, work as Id1Commutation course is completed when=0, failure electricity
Stream is transferred completely into main electronic switch branch.
It is working state of circuit breaker in main electronic switch branch turn off process shown in Fig. 5.
Electric current on change of current branch is reduced to after zero, it is necessary to reserve certain turn-off time (i.e. blow-out angle) for thyristor
Afterwards, solid-state switch could calculate thorough shut-off, and change of current branch is completed to disconnect.
After thyristor recovers forward blocking ability, the IGBT of all switch elements in main electronic switch branch is turned off, this
When main electronic switching circuit in resistance it is very big, therefore electric current is quickly decreased to zero.
In main electronic switch branch after all IGBT shut-off, overvoltage is formed on breaker, arrester in switch element
Electric current rises, by energy absorption.
Electric current on main electronic switch branch is quickly reduced to zero, and all solid state high speed d-c circuit breaker of forced commutation type is completed
The disconnection task of DC circuit, finally pulls open disconnecting switch.
Fig. 6 show patent of the present invention and proposes that all solid state High-speed DC speed breaker of forced commutation type changes in disconnection process
Flow current waveform figure in branch and main electronic switch branch.
Breaker starts to act at the 0.1ms moment, commutation switch shut-off, capacitance charging.
At the 1.1ms moment, the IGBT of main all switch elements of electronic switch branch is opened in triggering, and change of current branch current is rapid
Zero is fallen to, change of current branch and main electronic switch branch commutation course terminate.
After change of current branch current is zero, the enough pipeline section time is reserved for thyristor, main electricity is turned off at the 2.15ms moment
The IGBT of all switch elements in sub switch branch.
At the 2.3ms moment, the electric current in breaker falls to zero, and dc circuit breaker completes shut-off.Breaker entirely works
Process duration is less than 2.2ms.
Patent of the present invention proposes all solid state high direct current speed breaker of forced commutation type in disconnection process, and commutation switch is closing
Capacitance in MMC submodules of having no progeny charges, and after main electronic switch branch triggering and conducting, thyristor both ends form backward voltage, change
Electric current on stream branch quickly falls to zero, and after thyristor forward blocking ability Quick-return, change of current branch disconnects.Main electronic cutting
Closing branch, electric current can be dropped rapidly to zero after shut-off.Without mechanical switch is used in breaker, by power electronic devices
Control complete electric current transfer and shut-off, ensure that the actuation time of breaker.Electric power electricity in solid-state switch and commutation switch
Sub- device number is few, significantly reduces the running loss of breaker.
Commutation switch embodiment
Commutation switch in the present embodiment is identical with the commutation switch structure in above example, therefore does not illustrate again.
The embodiment of the present invention is presented above, but the present invention is not limited to described embodiment.At this
Invent under the thinking that provides, using by the way of being readily apparent that to those skilled in the art to the technology hand in above-described embodiment
Duan Jinhang conversion, replace, modification, and play the role of with the present invention in relevant art means it is essentially identical, realize hair
Improving eyesight it is also essentially identical, the technical solution so formed is finely adjusted above-described embodiment to be formed, this technical solution
Still fall within protection scope of the present invention.
Claims (5)
1. a kind of all solid state high speed d-c circuit breaker of forced commutation type, including change of current branch in parallel and main electronic switch branch,
The change of current branch route solid-state switch and commutation switch are composed in series；It is characterized in that, the commutation switch is by bridge-type MMC
Module-cascade forms, and is either made of or by bridge-type MMC submodules and semi-bridge type MMC semi-bridge type MMC sub-module cascades
Module is formed according to setting number, concatenated in order；
The bridge-type MMC submodules are made of upper and lower two bridge arms parallel connection, and string is equipped with two full-controlled switch devices on upper bridge arm,
Gone here and there in lower bridge arm and be equipped with two full-controlled switch devices, intermediate connection point and the lower bridge of two full-controlled switch devices on upper bridge arm
String is equipped with capacitance between the intermediate connection point of two full-controlled switch devices on arm；
The semi-bridge type MMC submodules are made of upper and lower bridge arm parallel connection, on upper bridge arm string be equipped with full-controlled switch device and
Capacitance, string is equipped with a full-controlled switch device in lower bridge arm；
At least one main electronic switch unit of the main electronic switch branch route is in series, and main electronic switch unit is by reversely going here and there
The full-controlled switch device composition of connection；
When the full-controlled switch device of whole MMC submodules in DC circuit failure, shut-off commutation switch, MMC submodules
In capacitance start to charge up, when capacitance reaches setting value, trigger the full-control type of all switch elements in main electronic switch branch
Switching device.
2. all solid state high speed d-c circuit breaker of forced commutation type according to claim 1, it is characterised in that the solid-state is opened
Pass is made of the thyristor of at least one set of reverse parallel connection, is connected between the thyristor of multigroup reverse parallel connection.
3. all solid state high speed d-c circuit breaker of forced commutation type according to claim 2, it is characterised in that the full-control type
Switching device is IGBT.
4. all solid state high speed d-c circuit breaker of forced commutation type according to claim 1 or 2 or 3, it is characterised in that described
Dc circuit breaker further includes at least one arrester, and the arrester is connected in parallel on the change of current branch and main electronic switch branch
On corresponding branch or element.
5. the commutation switch for dc circuit breaker as claimed in claim 1, it is characterised in that the commutation switch is by full-bridge
Type MMC sub-module cascades form, and are either made of or by bridge-type MMC submodules and half-bridge semi-bridge type MMC sub-module cascades
Type MMC submodules are formed according to setting number, concatenated in order.
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| CN201510315026.XA CN104980137B (en) | 2015-06-10 | 2015-06-10 | A kind of all solid state high speed d-c circuit breaker of forced commutation type and commutation switch |
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| CN201510315026.XA CN104980137B (en) | 2015-06-10 | 2015-06-10 | A kind of all solid state high speed d-c circuit breaker of forced commutation type and commutation switch |
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| CN104980137B true CN104980137B (en) | 2018-05-04 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790234A (en) * | 2016-03-15 | 2016-07-20 | 许继电气股份有限公司 | High-voltage direct-current circuit breaker |
| CN105655966A (en) * | 2016-03-15 | 2016-06-08 | 许继电气股份有限公司 | Direct current breaker |
| CN106786349A (en) * | 2016-11-22 | 2017-05-31 | 平高集团有限公司 | A kind of assist exchanging circuit module and high voltage DC breaker |
| CN106971883A (en) * | 2017-04-19 | 2017-07-21 | 中国科学院电工研究所 | A kind of dc circuit breaker of hybrid switch device |
| CN107994553B (en) * | 2017-11-29 | 2019-10-01 | 全球能源互联网研究院有限公司 | A kind of method for dividing of hybrid dc circuit breaker |
| CN108233908B (en) * | 2018-01-12 | 2021-04-20 | 许继电气股份有限公司 | DC electronic switch |
| CN111453563B (en) * | 2019-01-21 | 2022-06-17 | 上海三菱电梯有限公司 | Elevator control device |
| CN114629098B (en) * | 2022-02-23 | 2022-11-11 | 中国科学院电工研究所 | Solid-state switch based on sectional type gapless lightning arrester and utilization rate improving method thereof |
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| CN103280763A (en) * | 2013-02-27 | 2013-09-04 | 国网智能电网研究院 | Direct current circuit breaker and realization method thereof |
| CN103997322A (en) * | 2014-05-27 | 2014-08-20 | 西安交通大学 | Full-solidity direct-current breaker and control method thereof |
| CN104300569A (en) * | 2014-09-29 | 2015-01-21 | 华中科技大学 | Short-circuit fault ride-through and recovery method for direct current side of HVDC on basis of mixed type MMC |
| CN104320011A (en) * | 2014-10-20 | 2015-01-28 | 西安许继电力电子技术有限公司 | Hybrid sub-module MMC converter with direct-current fault ride-through capability |
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| US6411529B1 (en) * | 1999-05-19 | 2002-06-25 | Abb Ab | Control for power plant |
| CN103280763A (en) * | 2013-02-27 | 2013-09-04 | 国网智能电网研究院 | Direct current circuit breaker and realization method thereof |
| CN103997322A (en) * | 2014-05-27 | 2014-08-20 | 西安交通大学 | Full-solidity direct-current breaker and control method thereof |
| CN104300569A (en) * | 2014-09-29 | 2015-01-21 | 华中科技大学 | Short-circuit fault ride-through and recovery method for direct current side of HVDC on basis of mixed type MMC |
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