CN107863884A - A kind of multiple module commutator transformer - Google Patents
A kind of multiple module commutator transformer Download PDFInfo
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- CN107863884A CN107863884A CN201711084995.4A CN201711084995A CN107863884A CN 107863884 A CN107863884 A CN 107863884A CN 201711084995 A CN201711084995 A CN 201711084995A CN 107863884 A CN107863884 A CN 107863884A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 56
- 238000002955 isolation Methods 0.000 claims abstract description 35
- 239000003990 capacitor Substances 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 10
- 238000013461 design Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 9
- 238000009826 distribution Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
Abstract
The present invention provides a kind of multiple module commutator transformer, including n input series/parallel, the submodule unit of output end series/parallel, n are any positive integer；Submodule unit includes high-frequency direct-current conversion module, high-frequency isolation conversion module and the low-voltage direct conversion module being sequentially connected；The present invention reduces high-frequency isolation link voltage stress by the discrete modularized design for multiple transformers of the high-frequency ac transformer that will be concentrated in the prior art while high-frequency ac transformer manufacturing difficulty is reduced；And each submodule is a DC converter, independently can debug and run, can also connection in series-parallel be combined into the commutator transformer operation of high-voltage large-capacity, effectively increase system effectiveness.
Description
Technical field
The invention belongs to technical field of electric power, is related to solid-state transformer, and more particularly to a kind of multiple module direct current becomes
Depressor.
Background technology
In direct current network, due to the maturation of full-control type voltage source converter (VSC) technology, Technology of HVDC based Voltage Source Converter hair
Exhibition is rapid, is had great application prospect in wind power plant access, island load power supply, unsynchronized networks networking etc..Especially
It is the development of Multi-end flexible direct current transmission, provides effective technological approaches for direct current networking, and encourage flexible direct current skill
Art extends to distribution side.
In order to realize high DC distribution net, middle straightening stream distribution bus and low-voltage direct micro-capacitance sensor bus or various different straight
The connection of the load of voltage class, energy-storage system and distributed power generation is flowed, commutator transformer is widely studied；And modularization
Raising commutator transformer voltage class and capacity are the important research directions of prior art.
Such as patent《A kind of more level DC transformers of High Frequency Link for mesolow DC distribution》(application number：
CN201510181572.9), mainly converted by the low-voltage direct conversion stage, high-frequency isolation conversion stage and HVDC that are sequentially connected
Level forms, and the DC side parallel of m full-bridge converter in low-voltage direct conversion stage draws low-voltage direct end, AC and high frequency
The primary side of m high-frequency isolation transformer is respectively connected with isolated variable level, after high-frequency isolation transformer secondary is sequentially connected in series and is gone here and there
Join inductance connection composition high voltagehigh frequency exchange end, high voltagehigh frequency exchange end and Modular multilevel converter in HVDC conversion stage
(MC) exchange end connection, the DC side of Modular multilevel converter (MC) draw HVDC end, and modular multilevel becomes
Parallel operation (MC) is made up of the sub- bridge arm comprising multiple submodule.
Such as patent《A kind of modularized dc solid-state transformer for HVDC power transmission and distribution》(application number：
CN201410361071.4), it is made up of two Modular multilevel converters and transformer, the first Modular multilevel converter
It is made up of k identical bridge arm, each bridge arm is divided into upper half bridge arm and lower half bridge arm, and upper half bridge arm and lower half bridge arm are by n
Submodule is connected；The former and deputy side of transformer forms by k winding；Second Modular multilevel converter is by k identical bridge
Arm forms, and each bridge arm is divided into upper half bridge arm and lower half bridge arm, and upper half bridge arm and lower half bridge arm are connected by m submodule SM；
The midpoint of each bridge arm is connected with the primary side lead of transformer respectively in first Modular multilevel converter；Second modularization is more
The midpoint of each bridge arm of level converter is connected with the secondary lead of transformer respectively.The achievable high pressure of the present invention and low pressure or height
The voltage matches of straightening stream transmission and distribution network.
Above prior art improves commutator transformer voltage class and capacity to meet high, middle pressure by modular technology
The connection of different DC voltage levels between DC distribution net or low-voltage direct micro-capacitance sensor bus, but its high-frequency isolation link be
Quarantine at assembly sites conversion is carried out among Two Stages, but this design method causes transformer high frequency voltage all very high, often etc.
In high pressure, the voltage of middle pressure DC side, very big voltage stress will be brought so in switching process, easily causes electronics device
Part damages；In addition in debugging, low-voltage direct conversion stage or need using the conversion stage as one during HVDC conversion stage
Entirety is debugged, and reduces the flexibility of installation and debugging.
The content of the invention
In view of this, the present invention provides a kind of multiple module commutator transformer, passes through the height that will be concentrated in the prior art
The discrete modularized design for multiple transformers of frequency AC transformer, subtract while high-frequency ac transformer manufacturing difficulty is reduced
Small high-frequency isolation link voltage stress；And each submodule is a DC converter, independently can debug and run,
The commutator transformer operation of high-voltage large-capacity can be combined into connection in series-parallel, effectively increases system effectiveness.
To reach above-mentioned purpose, technical scheme is as follows：
A kind of multiple module commutator transformer, including n input series/parallel, the submodule of output end series/parallel
Module unit, n are any positive integer；Submodule unit includes high-frequency direct-current conversion module, the high-frequency isolation change mold changing being sequentially connected
Block and low-voltage direct conversion module；Wherein, during the high-frequency isolation conversion module high side voltage sum of n submodule unit is
Pressure/high voltage dc bus voltage.
Further, high-frequency direct-current conversion module uses H bridge structures, and the sub- bridge arm of high-frequency direct-current conversion module is equipped with identical
Number it is at least one by the full-control type bridge arm switch module that forms in parallel with DC capacitor.When the number of switch module is more than
Or during equal to 2, the switch module of sub- bridge arm is serially connected setting.
Specifically, switch module is by first switch, second switch, the first diode, the second diode and DC capacitor structure
Into, first switch and the first diode inverse parallel, second switch and the second diode inverse parallel, first switch and second switch string
Connection, the colelctor electrode of first switch are connected with the positive pole of DC capacitor, and the emitter stage of second switch is connected with the negative pole of DC capacitor.
Further, the switch module on the sub- bridge arm of high-frequency direct-current conversion module by bridge arm inductance with corresponding bridge arm
Point connection.
Further, high-frequency isolation conversion module includes high-frequency isolation transformer, resonant capacitance and resonant inductance, and high frequency is straight
Stream conversion module is connected by resonant capacitance and resonant inductance with high-frequency isolation transformer primary side winding.
As low-voltage direct conversion module first embodiment of the present invention, low-voltage direct conversion module is included by four switching tubes
The low-pressure side H full-bridge structure formed as switch, reverse parallel connection has diode, low-pressure side H full-bridge structure to four switching tubes respectively
It is serially connected in after the parallel connection direct electric capacity of right side between high-frequency isolation transformer vice-side winding and low-pressure side direct-current micro-grid.
As low-voltage direct conversion module second embodiment of the present invention, low-voltage direct conversion module structure becomes with high-frequency direct-current
It is identical to change the mold block structure.
As low-voltage direct conversion module 3rd embodiment of the present invention, low-voltage direct conversion module is included by four diodes
As the low-pressure side H full-bridge structure of switch composition, high-frequency isolation is serially connected in after parallel connection direct electric capacity on the right side of low-pressure side H full-bridge structure
Between transformer secondary winding and low-pressure side direct-current micro-grid.
The beneficial effects of the invention are as follows：
(1) multiple module commutator transformer provided by the invention is by the high-frequency ac transformer of prior art concentrated setting
The discrete transformer in n submodule unit high-frequency isolation conversion module so that n submodule unit medium-high frequency isolation link
Voltage it is all very low, be the 1/n of middle pressure/high voltage dc bus voltage in the prior art, therefore voltage stress is small, reducing high frequency
The dv/dt of high frequency link is reduced while AC transformer manufacture difficulty, is avoided excessively electric caused by transformer parasitic capacitance
Stream.
(2) multiple module commutator transformer provided by the invention is by using based on the improved H bridges structure of half-bridge structure,
Realize Redundancy Design and Fault Isolation.
(3) each submodule unit is a DC/DC conversion in multiple module commutator transformer provided by the invention
Device, independently can debug and run, can also connection in series-parallel be combined into high-voltage large-capacity commutator transformer operation.
Brief description of the drawings
By the description to the embodiment of the present invention referring to the drawings, above-mentioned and other purpose of the invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 is multiple module commutator transformer topology diagram provided by the invention；
Fig. 2 is the multiple module commutator transformer topology diagram provided by the invention being improved to low-pressure side；
Fig. 3 provides the multiple module commutator transformer topology diagram applied to power one-way transmission for the present invention.
Embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.
Example embodiment is described more fully with now with reference to accompanying drawing；However, example embodiment can be in different forms
It is implemented and should not be construed as being limited to the embodiment illustrated herein.On the contrary, these embodiments are provided to enable this public affairs
It is comprehensive and complete to open, and will fully pass on illustrative embodiments to those skilled in the art.Identical label
All the time identical element is represented.
It will also be understood that when an element be referred to as another element " between ", " being connected to " or " being attached to " another element
When, the element can directly between another element, be directly connected to or be attached to another element, or there may be cental element
Part.On the contrary, when an element be referred to as " direct " another element " between ", direct " being connected to " or " being attached to " another element
When, in the absence of intermediary element.
The present invention provides a kind of multiple module direct current for being applied to middle straightening stream (MVDC)/HVDC (HVDC) power network
Transformer, its topological structure is as shown in figure 1, including the modular submodule unit of n identical：Submodule unit 1, submodule
Unit 2 ... submodule unit i ... submodule unit n, wherein n are any positive integer, 1≤i≤n.Each submodule unit bag
Include the high-frequency direct-current conversion module being sequentially connected, high-frequency isolation conversion module and low-voltage direct conversion module.
The present invention is discrete for n submodule unit high-frequency isolation change by the high-frequency ac transformer of prior art concentrated setting
Change the mold the transformer in block so that the voltage of n submodule unit medium-high frequency isolation link is all very low, n submodule unit
High-frequency isolation conversion module high side voltage sum is middle pressure/high voltage dc bus voltage, therefore voltage stress is small, high reducing
The dv/dt of high frequency link is reduced while frequency AC transformer manufacture difficulty, avoids mistake caused by transformer parasitic capacitance
Electric current.
High-frequency direct-current conversion module is using the improved H bridges structure of half-bridge structure is based on, as shown in figure 1, two of H bridge structures
Bridge arm (the first bridge arm and the second bridge arm) forms by sub- bridge arm up and down, and every sub- bridge arm is equipped with structure identical several phases
Mutually connect by the full-control type bridge arm switch module that forms in parallel with DC capacitor, every sub- bridge arm is only drawn in Fig. 1 and sets one
The embodiment of individual switch module, but in actual applications, multiple switch modules being serially connected can be set in every sub- bridge arm.Below
Only illustrated exemplified by a switch module is set.
Wherein, bridge arm is provided with first switch module on the first bridge arm, and the full-control type bridge arm of first switch module is opened by first
Close Si111, second switch Si112, the first diode Di111, the second diode Di112With DC capacitor Ci11Form, first switch Si111
With the first diode Di111Inverse parallel, second switch Si112With the second diode Di112Inverse parallel, first switch Si111Opened with second
Close Si112Series connection, first switch Si112Colelctor electrode and DC capacitor Ci11Positive pole be connected, second switch Si112Emitter stage with
DC capacitor Ci11Negative pole be connected.
Similar, bridge arm is provided with second switch module under the first bridge arm, and second switch module is by first switch Si121, second
Switch Si122, the first diode Di121, the second diode Di122With DC capacitor Ci12Form, its attachment structure is opened with above-mentioned first
It is identical to close module；Bridge arm is provided with the 3rd switch module on second bridge arm, and the 3rd switch module is by first switch Si131, second switch
Si132, the first diode Di131, the second diode Di132With DC capacitor Ci13Form, its attachment structure and above-mentioned first switch mould
Block is identical；Bridge arm is provided with the 4th switch module on second bridge arm, and the 4th switch module is by first switch Si141, second switch Si142、
First diode Di141, the second diode Di142With DC capacitor Ci14Form, its attachment structure and above-mentioned first switch module phase
Together.
Further, above-mentioned first switch module, second switch module pass through bridge arm inductance L respectivelyAWith in the first bridge arm
Point connection, the 3rd switch module, the 4th switch module pass through bridge arm inductance L respectivelyAIt is connected with the second bridge arm midpoint.
When some submodule unit in n submodule unit breaks down, by high-frequency direct-current conversion module H bridges
Second switch turns in four switch modules, switchs and drives in the first switch and low-voltage direct conversion module in four switch modules
Moving pulse is turned off, and can bypass the failure submodule unit, so as to realize Redundancy Design and Fault Isolation, in addition when high pressure/
During middle pressure dc-side short-circuit, the driving pulse of all switches of high-frequency direct-current conversion module is turned off, short circuit current can be cut off.
High-frequency isolation conversion module includes high-frequency isolation transformer T, resonant capacitance Cs and resonant inductance Ls, high-frequency direct-current change
Change the mold series resonant capacitance Cs and resonant inductance L between block and high-frequency isolation transformer Ts, by using resonance in exchange link
Scheme, system effectiveness can be improved.Wherein resonant capacitance Cs, resonant inductance Ls and above-mentioned bridge arm inductance LAValue to be more than or
Null any value.As resonant capacitance Cs, resonant inductance Ls and above-mentioned bridge arm inductance LAValue be equal to zero, that is, be equivalent to not
Include resonant capacitance Cs, resonant inductance Ls and above-mentioned bridge arm inductance LAApplication scenarios.
As the first embodiment of low-voltage direct conversion module of the present invention, as shown in figure 1, low-voltage direct conversion module bag
Include by four switching tube Si21, Si22, Si23, Si24The low-pressure side H full-bridge structure formed as switch, four switching tube Si21, Si22,
Si23, Si24Reverse parallel connection has diode D respectivelyi21, Di22, Di23, Di24, low-pressure side H full-bridge structure right side is parallel with a direct current
Electric capacity Ci2After be serially connected between high-frequency isolation transformer T vice-side windings and low-pressure side direct current (LVDC) microgrid.
As second of embodiment of low-voltage direct conversion module of the present invention, as shown in Fig. 2 in order that low-voltage direct converts
Module is equally provided with redundancy structure design and DC Line Fault disposal ability, and low-voltage direct conversion module uses to be become with high-frequency direct-current
Mold changing block identical is based on the improved H bridges structure of half-bridge structure, is then serially connected in high-frequency isolation transformer T vice-side windings and low pressure
Between side direct current (LVDC) microgrid.
As the third embodiment of low-voltage direct conversion module of the present invention, when the scene applied to power one-way transmission
When, low-voltage direct conversion module is included by four diode Di21, Di22, Di23, Di24The low-pressure side H full-bridge knot formed as switch
Structure, then parallel connection direct electric capacity Ci2After be serially connected between high-frequency isolation transformer T vice-side windings and low-pressure side direct current (LVDC) microgrid.
So as to improve economy while power one-way transmission is met.
Multiple module commutator transformer provided by the invention in specific work process, in (height) pressure side high-frequency direct-current become
Mold changing block H bridge switch pipe uses pulse width modulation, and two level or three level high-frequency ripples are produced in exchange outlet side；Low-pressure side is same
Sample is to use pulse width modulation, and two level or three level high-frequency ripples are produced in exchange outlet side.
In addition to above-mentioned connected mode, using above-mentioned submodule unit as elementary cell, according to the difference of application scenarios, sheet
(height) pressure side series connection-low-pressure side series connection during the change multiple module commutator transformer that invention provides can also be carried out, in (height) pressure
Side parallel connection-low-pressure side it is in parallel and in the structure connected of (height) pressure side parallel connection-low-pressure side.
Each submodule unit is a DC/DC converter in multiple module commutator transformer provided by the invention,
Independently can debug and run, can also connection in series-parallel be combined into high-voltage large-capacity commutator transformer operation, improve installation and adjust
The flexibility of examination.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, in addition, the present invention can have respectively
Kind change and change.All any modification, equivalent substitution and improvements made within spirit and principles of the present invention etc., all should be wrapped
It is contained within protection scope of the present invention.
Claims (9)
- A kind of 1. multiple module commutator transformer, it is characterised in that：Including n input series/parallel, output end series connection/ Submodule unit in parallel, the n is any positive integer；The high-frequency direct-current that the submodule unit includes being sequentially connected becomes mold changing Block, high-frequency isolation conversion module and low-voltage direct conversion module；The high-frequency isolation conversion module high pressure of the n submodule unit Side voltage sum is middle pressure/high voltage dc bus voltage.
- A kind of 2. multiple module commutator transformer according to claim 1, it is characterised in that：The high-frequency direct-current conversion Module uses H bridge structures, and the sub- bridge arm of high-frequency direct-current conversion module is equipped with one by full-control type bridge arm and DC capacitor simultaneously Join the switch module formed.
- A kind of 3. multiple module commutator transformer according to claim 1, it is characterised in that：The high-frequency direct-current conversion Module uses H bridge structures, the sub- bridge arm of high-frequency direct-current conversion module be equipped with equal number of at least two be in series by The switch module of full-control type bridge arm composition in parallel with DC capacitor.
- A kind of 4. multiple module commutator transformer according to Claims 2 or 3, it is characterised in that：The switch module It is made up of first switch, second switch, the first diode, the second diode and DC capacitor, the first switch and the one or two Level pipe inverse parallel, the second switch and the second diode inverse parallel, the first switch are connected with second switch, and described first The colelctor electrode of switch is connected with the positive pole of DC capacitor, and the emitter stage of the second switch is connected with the negative pole of DC capacitor.
- A kind of 5. multiple module commutator transformer according to Claims 2 or 3, it is characterised in that：The high-frequency direct-current The switch module at the nearly corresponding bridge arm midpoint on the sub- bridge arm of conversion module is connected by bridge arm inductance with corresponding bridge arm midpoint, wherein The value of bridge arm inductance is any value more than or equal to zero.
- A kind of 6. multiple module commutator transformer according to claim 1, it is characterised in that：The high-frequency isolation conversion Module includes high-frequency isolation transformer, resonant capacitance and resonant inductance, the high-frequency direct-current conversion module by resonant capacitance and Resonant inductance is connected with high-frequency isolation transformer primary side winding；Wherein the value of resonant capacitance and resonant inductance be more than or equal to Zero any value.
- A kind of 7. multiple module commutator transformer according to claim 1, it is characterised in that：The low-voltage direct conversion Module includes the low-pressure side H full-bridge structure being made up of four switching tubes as switch, and four switching tubes distinguish reverse parallel connection Have a diode, be serially connected on the right side of the low-pressure side H full-bridge structure after parallel connection direct electric capacity high-frequency isolation transformer vice-side winding with Between low-pressure side direct-current micro-grid.
- A kind of 8. multiple module commutator transformer according to claim 1, it is characterised in that：The low-voltage direct conversion Modular structure is identical with the high-frequency direct-current conversion module structure.
- A kind of 9. multiple module commutator transformer according to claim 1, it is characterised in that：The low-voltage direct conversion Module includes the low-pressure side H full-bridge structure being made up of four diodes as switch, and the low-pressure side H full-bridge structure right side is in parallel It is serially connected in after DC capacitor between high-frequency isolation transformer vice-side winding and low-pressure side direct-current micro-grid.
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| CN201711084995.4A CN107863884A (en) | 2017-11-07 | 2017-11-07 | A kind of multiple module commutator transformer |
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| CN201711084995.4A CN107863884A (en) | 2017-11-07 | 2017-11-07 | A kind of multiple module commutator transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108695840A (en) * | 2018-06-01 | 2018-10-23 | 中国电力科学研究院有限公司 | A kind of DC distribution net voltage control method and system |
| CN110022077A (en) * | 2019-04-10 | 2019-07-16 | 南京师范大学 | The compound modular multilevel solid-state transformer topological structure of power towards alternating current-direct current mixing power distribution network |
| CN111313713A (en) * | 2020-02-27 | 2020-06-19 | 清华大学 | Distributed control method for large-scale direct-current transformer |
| CN111817572A (en) * | 2020-07-20 | 2020-10-23 | 厦门大学 | Multi-port direct current system for realizing partial power conversion |
| US10819112B1 (en) | 2019-03-27 | 2020-10-27 | Abb Schweiz Ag | Feeder line fault response using direct current interconnection system |
| CN112600419A (en) * | 2020-11-27 | 2021-04-02 | 山东航天电子技术研究所 | Topological structure of non-isolated three-port converter and control method thereof |
| US10971934B2 (en) | 2018-12-31 | 2021-04-06 | Abb Schweiz Ag | Distribution networks with flexible direct current interconnection system |
| CN112636599A (en) * | 2020-11-12 | 2021-04-09 | 北京无线电测量研究所 | Direct-current high-voltage to direct-current low-voltage converter circuit and conversion method |
| CN112689948A (en) * | 2020-12-09 | 2021-04-20 | 华为技术有限公司 | Power converter and driving method thereof |
| US11031773B2 (en) | 2019-03-27 | 2021-06-08 | Abb Power Grids Switzerland Ag | Transformer isolation response using direct current link |
| CN112968612A (en) * | 2021-04-01 | 2021-06-15 | 西安交通大学 | Modular high-transformation-ratio isolated DC-DC converter |
| US11121543B2 (en) | 2018-12-31 | 2021-09-14 | Abb Schweiz Ag | Fault mitigation in medium voltage distribution networks |
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