CN108712090A - A kind of D.C. high voltage transmission mixing transverter - Google Patents
A kind of D.C. high voltage transmission mixing transverter Download PDFInfo
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- CN108712090A CN108712090A CN201810720168.8A CN201810720168A CN108712090A CN 108712090 A CN108712090 A CN 108712090A CN 201810720168 A CN201810720168 A CN 201810720168A CN 108712090 A CN108712090 A CN 108712090A
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Inverter Devices (AREA)
Abstract
The present invention provides a kind of D.C. high voltage transmission mixing transverter, the transverter includes multiple identical bridge arms, each bridge arm is composed in series by that can turn off pipe valve string with thyristor valve string, pipe valve string can each be turned off pipe can be turned off by m and be composed in series, m is the positive integer more than or equal to 1, each thyristor valve string is made of k Thyristors in series, and k is the integer more than or equal to 1.D.C. high voltage transmission mixing transverter using the present invention can reduce the commutation failure risk of conventional high-tension direct current transportation.
Description
Technical field
The invention belongs to direct current transportation field more particularly to a kind of D.C. high voltage transmission mixing transverters.
Background technology
High voltage dc transmission technology (HVDC, High-Voltage Direct Current) has using stable DC
Whether there is or not induction reactance, the advantages that capacitive reactance does not work yet, no stationary problem and the high-power remote direct current transportation that uses.High voltage direct current
Transmission of electricity is that three-phase alternating current is become direct current by current conversion station rectification, is then sent to another change of current by DC power transmission line
Station is reverse into the power transmission mode of three-phase alternating current.It is substantially made of two current conversion stations and DC transmission line, two current conversion stations
It is connected with the AC system at both ends.The equipment of HVDC transmission system includes：Transverter, converter power transformer, flat wave reactance
Device, alternating current filter, direct current arrester and control protection equipment etc..Transverter is the core equipment of D.C. high voltage transmission, is shadow
Ring the key factor of HVDC system performances, the method for operation, equipment cost and running wastage etc..Transverter realizes direct current exchange
Electric mutually conversion, when it is operated in rectification (or inversion) state, also known as rectifier (or inverter).Generally by two or more
A converter bridge forms commutation system, realizes AC to DC, the function of rheology exchange.
Commutation failure is one of higher failure of DC transmission system probability of happening.In transverter, the valve of conducting is exited
Fail to restore blocking ability within a period of time of backward voltage effect, or commutation process has not carried out during backward voltage
Finish, then when threshold voltage becomes forward direction, phase all will be switched to the original predetermined valve for exiting conducting by the valve of commutation, such case claims
For commutation failure.Commutation failure main cause is that fault in ac transmission system makes inverter side change of current busbar voltage decline, certain
Under the conditions of, some commutation failures can restore automatically, but in case of twice or repeatedly continuous commutation failure, converter valve will
Locking, interrupts the passway for transmitting electricity of straight-flow system, in severe cases it is possible that commutation mistake occurs simultaneously for multiple Inverter Stations
It loses, even results in mains breakdown.
Transverter mostly uses the composition three-phase bridge rectification conduct of thyristor thyristor in conventional high-tension direct current transportation
Basic unit, each bridge arm are made of thyristor valve string, due to thyristor valve string can not active control switch off current, transverter
With larger change of current electric current and reactive power support, there are the risk of commutation failure, reliability is to be improved.
Invention content
It is an object of the invention to overcome above-mentioned defect existing in the prior art, conventional high-tension can be reduced by providing one kind
The transverter of the commutation failure risk of direct current transportation.
In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions：
A kind of D.C. high voltage transmission mixing transverter, the transverter include multiple identical bridge arms, each bridge arm by
Pipe valve string composition can be turned off, pipe valve string can be each turned off pipe can be turned off by m and be composed in series, m is the positive integer more than 1, can be closed
Series connection is realized in anode and cathode connection to disconnected pipe two-by-two, more specifically, the previous anode for turning off pipe can turn off the moon of pipe with the latter
Extremely it is connected and realizes series connection；Wherein, the pipe that turns off of pipe valve string first end can be turned off in the first bridge arm in the multiple bridge arm
Cathode is connect with DC voltage electrode, and the anode for turning off pipe and three-phase alternating current tie point that can turn off pipe valve string second end connect
It connects；The cathode for turning off pipe that pipe valve string first end can be turned off in the second bridge arm in the multiple bridge arm is electrically connected with three-phase alternating current
Contact connects, and the anode for turning off pipe that can turn off pipe valve string second end is connect with DC voltage cathode.
Further, according to the D.C. high voltage transmission mixing transverter, described turns off closing in pipe valve string
Disconnected pipe is one or more in IGCT or GTO or IGBT modified turn-off devices with reverse blocking capability.It is special at this
In profit, for the simplicity and consistency of expression, the collector of IGBT is described as anode, the emitter of IGBT is described as cathode and retouches
It states.
Further, according to the D.C. high voltage transmission mixing transverter, described turns off turning off in pipe valve
Pipe for without reverse blocking capability IGCT or GTO or IGBT turn-off devices combined with Diode series, wherein diode
Anode be connected with the cathode of turn-off device realization series connection formed one can turn off pipe, the cathode of the diode in pipe can be turned off
For that can turn off the cathode of pipe, the anode that can turn off the turn-off device in pipe is the anode that can turn off pipe.
Further, according to the D.C. high voltage transmission mixing transverter, described turns off turning off in pipe valve
Pipe for without reverse blocking capability IGCT or GTO or IGBT turn-off devices combined with diode inverse parallel, wherein two poles
The anode of pipe is connected with the cathode of turn-off device, and the cathode of diode is connected with the anode during can turning off realizes inverse parallel shape
Pipe can be turned off at one, the cathode that can turn off the diode in pipe is the cathode that can turn off pipe, can turn off the diode in pipe
Anode is the anode that can turn off pipe.
Further, according to the D.C. high voltage transmission mixing transverter, the pipe that turns off is selected from following arbitrary
Two or more the combination for turning off pipe：IGCT or GTO or IGBT modifieds with reverse blocking capability can be turned off
Device；IGCT or GTO or IGBT turn-off devices without reverse blocking capability are combined with Diode series；Without anti-
It is combined to IGCT or GTO or the IGBT turn-off device of blocking ability with diode inverse parallel.
Further, the present invention also provides a kind of D.C. high voltage transmission mixing transverter, the transverter includes multiple phases
Same bridge arm, each bridge arm can turn off pipe by one and form, wherein can turn off pipe in the first bridge arm in the multiple bridge arm
Cathode connect with DC voltage electrode, anode is connect with three-phase alternating current tie point, the first bridge arm in the multiple bridge arm
In can turn off the cathode of pipe and connect with three-phase alternating current tie point, anode and DC voltage cathode；Wherein, Guan Weiyi can be turned off
IGCT or GTO or IGBT turn-off devices without reverse blocking capability are combined with a Diode series, wherein diode
Anode be connected with the cathode of turn-off device realization series connection formed one can turn off pipe, the cathode of the diode in pipe can be turned off
For that can turn off the cathode of pipe, the anode that can turn off the turn-off device in pipe is the anode that can turn off pipe.
Further, according to the D.C. high voltage transmission mixing transverter, wherein Guan Weiyi can be turned off and do not had instead
It is combined to IGCT or GTO or the IGBT turn-off device of blocking ability with a diode inverse parallel, wherein the anode of diode
It is connected with the cathode of turn-off device, the cathode of diode is connected with the anode during can turning off realizes that inverse parallel formation one can
Shutdown pipe, the cathode that can turn off the diode in pipe is the cathode that can turn off pipe, and the anode that can turn off the diode in pipe is can
Turn off the anode of pipe.
Further, the present invention also provides a kind of D.C. high voltage transmission mixing transverters, according to the high-voltage dc transmission
Electricity mixing transverter, each bridge arm further includes turning off the concatenated thyristor valve string of pipe valve string, each thyristor with described
Valve string is made of k Thyristors in series, and k is the integer more than or equal to 1, wherein the anode of previous thyristor is brilliant with the latter
The cathode of brake tube, which is connected, realizes series connection；Wherein, in the first bridge arm in the multiple bridge arm thyristor valve string cathode and direct current
Positive polarity connects, and the anode of thyristor valve string is connected with the cathode that can turn off pipe valve string；The second bridge in the multiple bridge arm
The cathode of thyristor valve string is connect with three-phase alternating current tie point in arm, the anode of thyristor valve string and the moon that can turn off pipe valve string
Extremely it is connected.
Further, the present invention also provides a kind of D.C. high voltage transmission mixing transverter, the transverter includes multiple phases
Same bridge arm, each bridge arm can turn off pipe by thyristor valve string and one and form, and each thyristor valve string is by k thyristor string
Connection composition, k are integer more than or equal to 1, wherein the anode of previous thyristor is connected realization with the cathode of the latter thyristor
Series connection；Wherein, the cathode of thyristor valve string is connect with DC voltage electrode in the first bridge arm in the multiple bridge arm, thyristor
The anode of valve string is connected with the cathode that can turn off pipe valve string；The cathode of thyristor valve string in the second bridge arm in the multiple bridge arm
It is connect with three-phase alternating current tie point, the anode of thyristor valve string is connected with the cathode that can turn off pipe valve string.
Further, according to the D.C. high voltage transmission mixing transverter, wherein the pipe that turns off is selected from following
Any one turns off pipe：IGCT with reverse blocking capability or GTO or IGBT modified turn-off devices；Do not have
IGCT or GTO or the IGBT turn-off device of reverse blocking capability are combined with Diode series；Without reverse blocking capability
IGCT or GTO or IGBT turn-off devices are combined with diode inverse parallel.
Mixing transverter provided by the invention because using the specific bridge arm for turning off pipe structure, and can turn off pipe
Bridge arm and specific connection type of the valve string with thyristor valve string cascaded structure, thus reduce conventional high-tension direct current transportation
Commutation failure risk.
It should be understood that foregoing general description and following detailed description are all exemplary, and it is intended to carry
For the further explanation of claimed technology.
Description of the drawings
The embodiment of the present invention is described in more detail in conjunction with the accompanying drawings, the above and other purposes of the present invention,
Feature and advantage will be apparent.Attached drawing is used for providing further understanding the embodiment of the present invention, and constitutes explanation
A part for book is not construed as limiting the invention for explaining the present invention together with the embodiment of the present invention.Except non-clearly referring to
Go out, otherwise attached drawing is not considered as drawn to scale.In the accompanying drawings, identical reference label typically represents same components or step.
In the accompanying drawings：
Fig. 1 is the structural schematic diagram for showing transverter in the prior art；
Fig. 2 is shown according to a kind of structural schematic diagram of the transverter of specific implementation mode of the present invention；
Fig. 3 is shown according to a kind of structural schematic diagram of the transverter of specific implementation mode of the present invention；
Fig. 4 is the structural representation for turning off pipe valve string for showing the transverter according to the first specific implementation mode of the invention
Figure；
Fig. 5 is the structural representation for turning off pipe valve string for showing the transverter according to second of specific implementation mode of the invention
Figure；
Fig. 6 is the structural representation for turning off pipe valve string for showing the transverter according to the third specific implementation mode of the invention
Figure.
Specific implementation mode
In order to enable the object, technical solutions and advantages of the present invention become apparent, root is described in detail below with reference to accompanying drawings
According to example embodiments of the present invention.Obviously, described embodiment is only a part of the embodiment of the present invention, rather than this hair
Bright whole embodiments, it should be appreciated that the present invention is not limited by example embodiment described herein.Based on reality described herein
Example is applied, those skilled in the art's obtained all other embodiment in the case where not making the creative labor should all be fallen into
Within protection scope of the present invention.In the present description and drawings, it will use the same reference numerals to represent substantially the same
Element and function, and by omission to the duplicate explanation of these elements and function.In addition, for clarity and brevity, it is convenient to omit
For the explanation of function and construction known in the art.
Fig. 1 is the structural schematic diagram of prior art transverter.Existing high voltage direct current converter mostly uses the three-phase bridge change of current
Circuit, also referred to as six pulse conversion devices, there are six identical bridge arms (Ap, Bp, Cp, An, Bn, Cn) for tool, and each bridge arm is by brilliant lock
Pipe valve string forms.Thyristor valve string can not active control switch off current, transverter have larger change of current electric current and reactive power support,
There are the risk of commutation failure, reliability is to be improved.
Fig. 2 is a kind of converter structure schematic diagram of specific implementation mode of technical solution of the present invention, with reference first to Fig. 2 to this
The converter structure of specific implementation mode is described in detail.The D.C. high voltage transmission mixing transverter of the present invention includes multiple phases
Same bridge arm includes in the present embodiment 6 identical using the high voltage direct current converter of three-phase bridge converter circuit to be
Bridge arm for.D.C. high voltage transmission mixing transverter shares 6 identical bridge arms (Ap, An, Bp, Bn, Cp, Cn), often
A bridge arm is formed by that can turn off pipe valve string, can each be turned off pipe valve string and can be turned off pipe (Q1 ... Qm) by m and is composed in series, m
For the positive integer more than or equal to 1.Wherein, P points and N points are respectively DC voltage tie point, and P is anode, and N is cathode, A, B, C point
Connect three-phase alternating current.Wherein, can turn off pipe valve string first end in the first bridge arm (Ap, Bp, Cp) in 6 bridge arms can
Shutdown pipe (Q1) cathode connect with DC voltage electrode (P), can turn off pipe valve string second end turns off pipe (Qm) anode with
Three-phase alternating current tie point (A, B, C) connects；Pipe valve string can be turned off in the second bridge arm (An, Bn, Cn) in 6 bridge arms
First end turns off pipe (Q1) cathode connect with three-phase alternating current tie point (A, B, C), second end turns off pipe (Qm)
Anode connect with DC voltage cathode (P).
Specifically, the pipe that turns off refers to the device for having automatic shutoff function, i.e., can both be controlled by controlling signal
The power electronic devices that is open-minded, and being turned off with control device of device processed.The turn-off device can include but is not limited to,
GTO (gate level turn-off thyristor), IGCT (integrated gate commutated thyristor), IGBT (igbt), GTR (electricity
Power transistor), MOSFET (electric power field-effect transistor) etc..The turn-off device can be one, or it is multiple, when
It is concatenated relationship between multiple turn-off devices, wherein previous to turn off when turn-off device is two or more
The cathode that the anode of pipe can turn off pipe with the latter is connected realization series connection, and multiple turn-off devices can be that same type being closed
Disconnected device, such as two GTO series connection or three GTO series connection etc.；Can also be that different types of turn-off device is gone here and there
Connection, such as a GTO connects with a GTR or a GTO and GTR and IGBT three connect etc..
Further, the structure for turning off pipe valve string of the transverter of the first specific implementation mode as shown in Figure 4, can
Shutdown pipe valve string can turn off pipe (Q1 ... Qm) by m and be composed in series, and m is the positive integer more than 1 at this time, described to turn off pipe Qm
For with reverse blocking capability IGCT or the modifieds turn-off device such as GTO or IGBT in it is one or more.It can switching off device
Part two-by-two connect by connected realize of anode and cathode, can turn off the turn-off device (Q of pipe valve string first end1) cathode be can turn off pipe valve
The cathode of string can turn off the turn-off device (Q of pipe valve string second endm) anode be the anode that can turn off pipe valve string.It is incorporated in
In embodiment shown in Fig. 2, in the first bridge arm (Ap, Bp, Cp) of the bridge arm, turning off for pipe valve string first end can be turned off
Device (Q1) cathode connect with DC voltage electrode (P), the turn-off device (Q of pipe valve string second end can be turned offm) anode with
Three-phase alternating current tie point connects；Pipe valve string first end can be turned off in the second bridge arm (An, Bn, Cn) in the multiple bridge arm
Turn-off device (Q1) cathode connect with three-phase alternating current tie point (A, B, C), turning off for pipe valve string second end can be turned off
Device (Qm) anode connect with DC voltage cathode.
In second specific embodiment of transverter of the present invention, in conjunction with second of specific implementation mode shown in fig. 5
The structure for turning off pipe valve string of transverter, can turn off pipe valve string and can turn off pipe (Q1 ... Qm) by m and be composed in series, at this time m
For the positive integer more than or equal to 1, the pipe that turns off is any in IGCT or GTO or IGBT without reverse blocking capability
The combination of kind turn-off device and Diode series, the turn-off devices that difference can turn off in pipe can be the same or different.
Wherein, the anode of diode is connected with the cathode (or emitter) of turn-off device, formed one can turn off pipe structure (Qi, 2≤
i≤m).In the present embodiment, it can be that can turn off pipe structure described in one that can turn off pipe valve string, or two or more
The pipe structures in series that turns off forms；When it is described turn off pipe valve string be two or more described in can turn off pipe structure string
When connection, the cathode (or emitter) of diode in pipe (Qi) can be turned off and pipe (Q can be turned offi-1) in turn-off device anode
(or collector) is connected.The cathode that the diode in pipe can be turned off is the cathode that can turn off pipe, can turn off in pipe can switching off device
The anode of part is the anode that can turn off pipe.In conjunction in the embodiment shown in Figure 2, the bridge arm the first bridge arm (Ap, Bp,
Cp in), can turn off pipe valve string first end turns off pipe (Q1) in the cathode of diode connect with DC voltage electrode (P),
Pipe valve string second end can be turned off turns off pipe (Qm) in the anode of turn-off device connect with three-phase alternating current tie point；Institute
State can turn off pipe valve string first end in the second bridge arm (An, Bn, Cn) in multiple bridge arms turn off pipe (Q1) in diode
Cathode connect with three-phase alternating current tie point (A, B, C), can turn off pipe valve string second end turns off pipe (Qm) in close
The anode of disconnected device is connect with DC voltage cathode.
In the third specific embodiment of transverter of the present invention, in conjunction with the third specific implementation mode shown in fig. 6
The structure for turning off pipe valve string of transverter, can turn off pipe valve string and can turn off pipe (Q1 ... Qm) by m and be composed in series, at this time m
For the positive integer more than or equal to 1, the pipe Qm that turns off is that IGCT or GTO or IGBT etc. without reverse blocking capability can
Shutdown device is combined with diode inverse parallel.Wherein, the inverse parallel combination refers specifically to, the anode and turn-off device of diode
Cathode (or emitter) be connected, the cathode of diode is connected with the anode (or collector) of turn-off device.The present embodiment
In, it can be that can turn off pipe structure described in one that can turn off pipe valve string, or two or more described to turn off pipe knot
Structure is connected in series；When that can turn off pipe valve string and can turn off pipe by two or more and be connected in series, turn-off device in Qi
Anode (or collector) is connected with the cathode (or emitter) of turn-off device in Qi-1.The diode turned off in pipe
Cathode is the cathode that can turn off pipe, and the anode that can turn off the diode in pipe is the anode that can turn off pipe.It is incorporated in shown in Fig. 2
In embodiment, in the first bridge arm (Ap, Bp, Cp) of the bridge arm, can turn off pipe valve string first end turns off pipe (Q1) in
The cathode of diode connect with DC voltage electrode (P), can turn off pipe valve string second end turns off pipe (Qm) in two poles
The anode of pipe is connect with three-phase alternating current tie point；Pipe valve can be turned off in the second bridge arm (An, Bn, Cn) in the multiple bridge arm
String first end turns off pipe (Q1) in the cathode of diode connect with three-phase alternating current tie point (A, B, C), pipe can be turned off
Valve string second end turns off pipe (Qm) in the anode of diode connect with DC voltage cathode.
Fig. 3 is the converter structure schematic diagram of technical solution of the present invention another kind specific implementation mode, with reference to Fig. 3 to this
The converter structure of specific implementation mode is described in detail.In the present embodiment, D.C. high voltage transmission mixing transverter shares 6
A identical bridge arm (Ap, An, Bp, Bn, Cp, Cn), each bridge arm is by thyristor valve string and can turn off pipe valve string and forms,
Each thyristor valve string is composed in series by k thyristor (S1~Sk), and k is the positive integer more than or equal to 1, can each turn off pipe
Valve string can turn off pipe (Q1 ... Qm) by m and be composed in series, and m is the positive integer more than or equal to 1, wherein previous thyristor
Anode is connected with the cathode of the latter thyristor realizes series connection, and thyristor valve string and the tie point that can turn off pipe valve string are T.P points
It is respectively DC voltage tie point with N points, P is anode, and N is cathode, and A, B, C point connect three-phase alternating current.Wherein, the crystalline substance
Brake tube is unidirectional thyristor, and the pipe that turns off can turn off pipe structure for any of the above-described kind.It is equivalent to aforementioned such as Fig. 2 institutes
On the basis of the specific implementation mode shown, one thyristor valve string of series connection addition on each bridge arm.The first of the bridge arm
In bridge arm (Ap, Bp, Cp), the thyristor (S of thyristor valve string first end1) cathode connect with DC voltage electrode (P), brilliant lock
Thyristor (the S of pipe valve string second endk) anode and the thyristor valve string and the tie point T of pipe valve string can be turned off connect；Institute
State the thyristor (S of thyristor valve string first end in the second bridge arm (An, Bn, Cn) in multiple bridge arms1) in thyristor the moon
Pole is connect with three-phase alternating current tie point (A, B, C), the thyristor (S of thyristor valve string second endk) anode and the brilliant lock
Pipe valve string is connected with the tie point T that can turn off pipe valve string.
More specifically, in this embodiment, it is described turn off pipe be IGCT with reverse blocking capability or GTO or
The modifieds such as IGBT turn-off device (as shown in Figure 4).When it is described turn off pipe valve string be one described in can turn off pipe structure when,
The cathode (or emitter) and tie point T-phase that pipe Q1 can be turned off connect.When the pipe valve string that turns off is two or more institute
It states when can turn off pipe structures in series, QiCathode (or emitter) and Qi-1Anode (or collector) be connected, pipe valve can be turned off
In can turn off the cathode (or emitter) of pipe Q1 and connect with tie point T-phase.
More specifically, in this embodiment, the pipe structure that turns off turned off in pipe valve string is without reversed resistance
The combination (as shown in Figure 5) of the turn-off devices such as the IGCT or GTO of cutting capacity or IGBT and Diode series.Wherein, diode
Anode be connected with the cathode (or emitter) of turn-off device, formed one can turn off pipe structure Qi.In the present embodiment, it can close
Disconnected pipe valve string can be that can turn off pipe structure described in one, or it is two or more it is described turn off pipe structures in series and
At.More specifically, when the pipe valve string that can turn off is that can turn off pipe structure described in one, diode in pipe structure Q1 can be turned off
Cathode connects with tie point T-phase；When it is described turn off pipe valve string be two or more described in can turn off pipe structures in series when, Qi
The cathode (or emitter) of middle diode is connected with the anode (or collector) of turn-off device in Qi-1, can turn off in pipe Q1
The cathode (or emitter) of diode connects with tie point T-phase.
More specifically, when in the embodiment, the pipe structure that turns off turned off in pipe valve string is without reversed resistance
The turn-off devices such as the IGCT or GTO of cutting capacity or IGBT combine (as shown in Figure 6) with diode inverse parallel.Wherein, described anti-
Parallel combination refers specifically to, and the anode of diode is connected with the cathode (or emitter) of turn-off device, the cathode of diode with can
The anode (or collector) for turning off device is connected.In the present embodiment, it can be that can turn off pipe knot described in one that can turn off pipe valve string
Structure, or the two or more pipe structures in series that turn off form, more specifically, can turn off pipe valve string when described and be
Pipe structure can be turned off described in one, can turn off pipe Q1The cathode of middle diode connects with tie point T-phase；Pipe valve string is turned off when described
When can turn off pipe series connection for two or more, QiThe anode (or collector) and Q of middle turn-off devicei-1In can switching off device
The cathode (or emitter) of part is connected, and can turn off can turn off pipe Q in pipe valve string1In turn-off device anode (or collector)
Connect with tie point T-phase, can also turn off can turn off pipe Q in pipe valve string1In diode cathode (or emitter) and tie point T
It is connected.
Mixing transverter provided by the invention because using the specific bridge arm for turning off pipe structure, and can turn off pipe
Bridge arm and specific connection type of the valve string with thyristor valve string cascaded structure, thus reduce conventional high-tension direct current transportation
Commutation failure risk.
It is set specifically, those skilled in the art can carry out selectivity with principle according to the present invention to the specific component
It sets, as long as the principle of the control method of the present invention can be realized.
It should be noted that purpose of the term as used in this specification merely for description particular implementation, rather than
It is intended to limit the invention.Unless the context clearly indicates otherwise, otherwise singulative as used herein
" one ", "one" and "the" are also intended to including plural form.The terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
Those skilled in the art should understand that be：The above embodiments are only used to illustrate the technical solution of the present invention., and
It is non-that it is limited；Although present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can
With technical scheme described in the above embodiments is modified, either which part or all technical features are carried out etc.
With replacement；And these modifications or replacements, the range of it does not separate the essence of the corresponding technical solution claims of the present invention.
Claims (10)
1. a kind of D.C. high voltage transmission mixing transverter, the transverter includes multiple identical bridge arms, and each bridge arm is by can
Pipe valve string composition is turned off, pipe valve string can be each turned off pipe can be turned off by m and be composed in series, m is the positive integer more than 1, wherein preceding
The cathode that one anode that can turn off pipe can turn off pipe with the latter, which is connected, realizes series connection；Wherein, in the multiple bridge arm
The cathode for turning off pipe that pipe valve string first end can be turned off in one bridge arm is connect with DC voltage electrode, can turn off pipe valve string second
The anode for turning off pipe at end is connect with three-phase alternating current tie point；Pipe valve can be turned off in the second bridge arm in the multiple bridge arm
The cathode for turning off pipe of string first end is connect with three-phase alternating current tie point, can turn off the pipe that turns off of pipe valve string second end
Anode is connect with DC voltage cathode.
2. D.C. high voltage transmission mixing transverter according to claim 1, described turns off turning off in pipe valve string
Pipe is one or more in IGCT or GTO or IGBT modified turn-off devices with reverse blocking capability.
3. D.C. high voltage transmission mixing transverter according to claim 1, described turning off in pipe valve turns off pipe
For without reverse blocking capability IGCT or GTO or IGBT turn-off devices combined with Diode series, wherein diode
Anode is connected with the cathode of turn-off device, and the cathode that can turn off the diode in pipe is the cathode that can turn off pipe, can turn off pipe
In the anode of turn-off device be the anode that can turn off pipe.
4. D.C. high voltage transmission mixing transverter according to claim 1, described turning off in pipe valve turns off pipe
For without reverse blocking capability IGCT or GTO or IGBT turn-off devices combined with diode inverse parallel, wherein diode
Anode be connected with the cathode of turn-off device, the cathode of diode is connected with the anode during can turning off, and can turn off in pipe
The cathode of diode is the cathode that can turn off pipe, and the anode that can turn off the diode in pipe is the anode that can turn off pipe.
5. D.C. high voltage transmission mixing transverter according to claim 1, the pipe that turns off is selected from following arbitrary two
Kind or the two or more combinations for turning off pipe：IGCT or GTO or IGBT modifieds with reverse blocking capability can switching off device
Part；IGCT or GTO or IGBT turn-off devices without reverse blocking capability are combined with Diode series；Without reversed resistance
IGCT or GTO or the IGBT turn-off device of cutting capacity are combined with diode inverse parallel.
6. a kind of D.C. high voltage transmission mixing transverter, the transverter includes multiple identical bridge arms, and each bridge arm is by one
It is a to turn off pipe composition, wherein the cathode and DC voltage electrode that pipe can be turned off in the first bridge arm in the multiple bridge arm connect
It connects, anode is connect with three-phase alternating current tie point, and the cathode and three-phase of pipe can be turned off in the second bridge arm in the multiple bridge arm
Alternating current tie point connects, anode and DC voltage cathode；Wherein, Guan Weiyi can be turned off and do not have reverse blocking capability
IGCT or GTO or IGBT turn-off devices are combined with a Diode series, wherein the anode of diode and turn-off device
Cathode is connected, and the cathode that can turn off the diode in pipe is the cathode that can turn off pipe, can turn off the sun of the turn-off device in pipe
The anode of pipe can extremely be turned off.
7. D.C. high voltage transmission mixing transverter according to claim 6, wherein Guan Weiyi can be turned off and do not had reversely
IGCT or GTO or the IGBT turn-off device of blocking ability are combined with a diode inverse parallel, wherein the anode of diode with
The cathode of turn-off device is connected, and the cathode of diode is connected with the anode during can turning off, and can turn off the diode in pipe
Cathode is the cathode that can turn off pipe, and the anode that can turn off the diode in pipe is the anode that can turn off pipe.
8. according to any D.C. high voltage transmission mixing transverter of claim 1~7, each bridge arm further includes and institute
The concatenated thyristor valve string of pipe valve string can be turned off by stating, and each thyristor valve string is made of k Thyristors in series, and k is more than or equal to 1
Integer, wherein the anode of previous thyristor be connected with the cathode of the latter thyristor realization series connection；Wherein, the multiple
The cathode of thyristor valve string is connect with DC voltage electrode in the first bridge arm in bridge arm, the anode of thyristor valve string with can turn off
The cathode of pipe valve string is connected；The cathode of thyristor valve string and three-phase alternating current tie point in the second bridge arm in the multiple bridge arm
Connection, the anode of thyristor valve string are connected with the cathode that can turn off pipe valve string.
9. a kind of D.C. high voltage transmission mixing transverter, the transverter includes multiple identical bridge arms, and each bridge arm is by crystalline substance
Gate tube valve string and one can turn off pipe valve string composition, and each thyristor valve string is made of k Thyristors in series, and k is more than or equal to 1
Integer, wherein the anode of previous thyristor be connected with the cathode of the latter thyristor realization series connection；Wherein, the multiple
The cathode of thyristor valve string is connect with DC voltage electrode in the first bridge arm in bridge arm, the anode of thyristor valve string with can turn off
The cathode of pipe valve string is connected；The cathode of thyristor valve string and three-phase alternating current tie point in the second bridge arm in the multiple bridge arm
Connection, the anode of thyristor valve string are connected with the cathode that can turn off pipe valve string.
10. D.C. high voltage transmission mixing transverter according to claim 9, wherein the pipe that turns off is selected from following
Any one turns off pipe：IGCT with reverse blocking capability or GTO or IGBT modified turn-off devices；Without anti-
It is combined to IGCT or GTO or the IGBT turn-off device of blocking ability with Diode series；Without reverse blocking capability
IGCT or GTO or IGBT turn-off devices are combined with diode inverse parallel.
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| CN111416510A (en) * | 2020-03-20 | 2020-07-14 | 清华大学 | Voltage equalizing circuit for high-voltage direct-current transmission hybrid converter |
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| CN111600497A (en) * | 2020-04-03 | 2020-08-28 | 清华大学 | Series bidirectional diode bridge converter for inhibiting high-voltage direct-current commutation failure |
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