CN106786722A - A kind of flexible ring device of star-like, triangular form and mixed type topological structure - Google Patents
A kind of flexible ring device of star-like, triangular form and mixed type topological structure Download PDFInfo
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- CN106786722A CN106786722A CN201710012054.3A CN201710012054A CN106786722A CN 106786722 A CN106786722 A CN 106786722A CN 201710012054 A CN201710012054 A CN 201710012054A CN 106786722 A CN106786722 A CN 106786722A
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- 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
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The present invention relates to a kind of star-like, triangular form and the flexible ring device of mixed type topological structure, including three dual-port modules, the unit that is substantially isolated that the dual-port module is corresponded to cascade by more than two both sides ports respectively is constituted, the converter that unit is substantially isolated including both sides and the converter with high-frequency isolation function of centre, the three-phase line voltage or three-phase phase voltage of three dual-port modules both sides connection sending end network or receiving end network, form star-like, triangular form or mixed type topology.Solve the problems, such as that high-voltage large-capacity high-frequency isolation link is difficult in the prior art.
Description
Technical field
The present invention relates to a kind of star-like, triangular form and the flexible ring device of mixed type topological structure, belong to power transmission and distribution skill
Art field.
Background technology
With expanding economy and the quick increase of load type and quantity, distribution network structure structure increasingly complex, I
State's big city power distribution network is limited progressively using grid structures such as cable run " 2-1 " looped network, cable run " 3-1 " looped networks
In the influence of the factors such as system short-circuit level, typically by the way of closed loop design, open loop operation, confession is reduced to a certain extent
Electric reliability.Therefore the power supply reliability and power supply quality of power distribution network receive increasing challenge, traditional AC distribution
Net has certain limitation in terms of power supply reliability, power supply quality is ensured.
Back-to-back transverter based on controllable power electronic devices, because the four-quadrant that can realize trend is controlled and is carried
For island with power voltage source, turning the aspects such as confession and island with power in the trend for solving conventional AC power distribution network has unique technology
Advantage, can serve as the bus interconnection of looped network in power distribution network, realize flexible Electromagnetic coupling, improve system operation reliability.
For at present, conventional back-to-back engineering is using two level and three-level converter structure, but urban land face
Product is nervous, therefore, for no industrial frequency transformer direct screening 10kV and ratings above bus, conventional two level and three-level converter
The resistance to voltage levels of device are limited to without being applicable.In order to reduce occupation of land, it is only capable of using Multilevel Inverters, it is more ripe at present to be
The back-to-back device of modular multi-level converter, and it has been applied to the Asynchronous Interconnection engineering of high-voltage fence.
However, modular multi-level converter is due to common high voltage DC side, high-voltage large-capacity high-frequency isolation link is difficult to
Realize, therefore practicality is not had in power distribution network.
The content of the invention
It is an object of the invention to provide a kind of star-like, triangular form and the flexible ring device of mixed type topological structure, solve
The problem that high-voltage large-capacity high-frequency isolation link is difficult in the prior art.
To achieve the above object, the solution of the present invention includes：A kind of flexible ring device of stelliform connection topology configuration, including three
Individual dual-port module, the dual-port module by more than two both sides ports respectively correspond to cascade be substantially isolated unit structure
Into, the converter with high-frequency isolation function of the converter for being substantially isolated unit including both sides and centre, described three are double
Port module side connects the three-phase phase voltage of sending end network, the phase voltage of the corresponding phase of opposite side connection receiving end network respectively.
The converter for being substantially isolated unit both sides is full-bridge converter, the middle converter with high-frequency isolation function
It is LLC resonant converter.
Present invention also offers a kind of flexible ring device of triangular form topological structure,
Including three dual-port modules, the dual-port module is corresponded to the base of cascade by more than two both sides ports respectively
This isolated location is constituted, the conversion with high-frequency isolation function of the converter for being substantially isolated unit including both sides and centre
Device, three dual-port modules side connects the three-phase line voltage of sending end network, opposite side connection receiving end network correspondence respectively
Line voltage.
The converter for being substantially isolated unit both sides is full-bridge converter, the middle converter with high-frequency isolation function
It is LLC resonant converter.
Present invention also offers a kind of flexible ring device of mixed type topological structure,
Including three dual-port modules, the dual-port module is corresponded to the base of cascade by more than two both sides ports respectively
This isolated location is constituted, the conversion with high-frequency isolation function of the converter for being substantially isolated unit including both sides and centre
Device, three dual-port modules side connects the three-phase phase voltage of sending end network respectively, and opposite side connects receiving end network respectively
Three-phase line voltage.
The converter for being substantially isolated unit both sides is full-bridge converter, the middle converter with high-frequency isolation function
It is LLC resonant converter.
Star-like, triangular form and the flexible ring device of mixed type topological structure that the present invention is provided, by by high-frequency isolation
Function incorporates back-to-back transverter, and composition is substantially isolated unit, and unit cascaded, formation high pressure is substantially isolated by more than two
Large Copacity high-frequency isolation link, is provided simultaneously with no industrial frequency transformer and floor space is small, modular high frequency isolated location provides electricity
The advantage of gas isolating power, for power distribution network bus flexible interconnection provides a kind of selectable topological arrangement scheme, and then improves friendship
Stream distribution network reliability simultaneously promotes it to develop.
Brief description of the drawings
Fig. 1 is the flexible ring device suitable for the interconnection of power distribution network bus of the present invention；
Fig. 2 is a kind of flexible ring device topology of star-like symmetrical structure；
Fig. 3 is a kind of flexible ring device topology of triangular form symmetrical structure；
Fig. 4 is the flexible ring device topology of a kind of star-like and triangular form mixed structure；
Fig. 5 is a kind of high-frequency isolation unit topology based on LLC resonant converter.
Specific embodiment
The technical scheme is that：The flexible ring device of a kind of star-like, triangular form and mixed type topological structure is provided,
Be substantially isolated by two or more it is unit cascaded constitute, wherein, be substantially isolated unit comprising two side converters and Intermediate Gray high frequency every
From the converter of function, such as LLC resonant converter, two side converters are made up of full-bridge converter, carry out industrial frequency AC and direct current
Between conversion, for the converter both sides of Intermediate Gray high-frequency isolation function provide direct current, the converter of Intermediate Gray high-frequency isolation function
Using double active bridge controlled resonant converters, for realizing that high-frequency soft switch runs, being substantially isolated unit both sides respectively has two ports, structure
Into the dual-port module for possessing high-frequency isolation function, by being substantially isolated the cascading of unit both sides port, Y types or D are formed
Type topology, i.e. wye connection or delta connection, as needed, the cascade form for being substantially isolated unit both sides can be simultaneously star
Type connection, or be simultaneously triangular form connection, can also be wye connection for side, opposite side is the mixing shape of triangular form connection
Formula, constitutes the connection type of YY, DD or DY, and wherein Y sides can need ground connection according to system, and the high-pressure side of cascade gained both sides is straight
Both sides sending end and receiving end power distribution network bus are accessed, by adjusting cascade number, required voltage class, energy can be combined into
It is enough to be easily embedded into the AC distribution net of different voltage class.
It is as shown in Figure 1 the flexible ring device suitable for power distribution network bus of the present invention, by more than two bases
This isolated location is constituted, and realizes cascade by being substantially isolated the port of unit both sides, and the high-pressure side of cascade gained both sides is direct
Access power distribution network bus.
With reference to specific embodiment, the invention will be further described：
Embodiment one
Heretofore described star-like symmetrical structure flexibility ring device topology is illustrated in figure 2, including by two or more
The both sides for being substantially isolated unit cascaded formation there is the dual-port module of dual-port, three dual-port modules, three are constituted altogether
After the star-like connection of dual-port module, respectively there is a three-phase for high-pressure side correspondence connection low-voltage bus bar gained both sides, as shown in Fig. 2
After three star-like connections of dual-port module, first high-pressure side of dual-port module connects the A phases of ABC three-phase low-voltage buses, the
Two high-pressure side connection B phases of dual-port module both sides, the 3rd high-pressure side connection C phase of dual-port module.
A kind of high-frequency isolation unit topology based on LLC resonant converter is illustrated in figure 5, according to existing IGBT maturation work(
The pressure-resistant and through-current capability of rate module, and ensure that LLC resonant converter realizes Sofe Switch under high frequency condition, and leave certain
Overload allowance, chooses the switching device of 1700V/200A, constitutes basic high-frequency isolation unit as shown in Figure 5, unit direct current ring
Economize on electricity pressure is set as 850V.
The present invention puies forward basic high-frequency isolation unit topology, is merely to illustrate the possibility embodiment of isolated topology, but not
It is limited to this, other can realize that the converter of high-frequency isolation function is equally applicable to the present invention.
As shown in Fig. 2 both sides ac bus voltage is 10kV, according to power distribution network actual demand, choosing its exchange capacity is
2MW, can be calculated that the electric current of cascade module is flowed through under star topology is 116A.
Idle fan-out capability is needed to have in view of flexible ring device, therefore it is 0.8 to design its unloaded modulation degree, is calculated
Can obtain per mutually 12 unit cascaded compositions of basic high-frequency isolation of needs, therefore the power grade of each unit is 56kW.
The present invention puies forward voltage class, capacity and cascade module quantity and is merely to illustrate topological embodiment, but is not limited to
This voltage class, capacity and cascade module quantity.
Embodiment two
It is illustrated in figure 3 the flexible ring device of the triangular form topological structure of the present embodiment, the present embodiment and embodiment one
Differ only in：High-pressure side connects a phase of low-voltage bus bar after the cascade of embodiment one, is phase voltage, and the present embodiment is both-end
Mouth mold block connects the line voltage of low-voltage bus bar, forms the triangular form connection of both sides.
Embodiment three
It is illustrated in figure 4 the flexible ring device of the mixed type topological structure of the present embodiment, the present embodiment and embodiment one
Difference with embodiment two is：The side of flexible ring device uses the wye connection described in embodiment one in the present embodiment,
High-pressure side connects phase voltage, and opposite side forms mixed type topological structure using the triangular form connection in embodiment two, and high-pressure side connects
Wiring voltage.
Embodiment of above is merely illustrative of the technical solution of the present invention rather than its limitations, it is all in thinking of the invention and
Any modification, equivalent and improvement for being made within principle etc., should be included within the scope of the present invention.
Claims (6)
1. the flexible ring device of a kind of stelliform connection topology configuration, it is characterised in that including three dual-port modules, the dual-port
The unit that is substantially isolated that module is corresponded to cascade by more than two both sides ports respectively is constituted, and the unit that is substantially isolated includes two
The converter of side and the converter with high-frequency isolation function of centre, three dual-port modules side connects sending end net respectively
The three-phase phase voltage of network, the phase voltage of the corresponding phase of opposite side connection receiving end network.
2. the flexible ring device of a kind of stelliform connection topology configuration according to claim 1, it is characterised in that it is described it is basic every
Converter from unit both sides is full-bridge converter, and the middle converter with high-frequency isolation function is LLC resonant converter.
3. a kind of flexible ring device of triangular form topological structure, it is characterised in that including three dual-port modules, the both-end
The unit that is substantially isolated that mouth mold block is corresponded to cascade by more than two both sides ports respectively is constituted, and the unit that is substantially isolated includes
The converter of both sides and the converter with high-frequency isolation function of centre, three dual-port modules side connects sending end respectively
The three-phase line voltage of network, opposite side connection receiving end network correspondence line voltage.
4. the flexible ring device of a kind of triangular form topological structure according to claim 3, it is characterised in that described basic
The converter of isolated location both sides is full-bridge converter, and the middle converter with high-frequency isolation function is LLC resonant converter.
5. a kind of flexible ring device of mixed type topological structure, it is characterised in that including three dual-port modules, the both-end
The unit that is substantially isolated that mouth mold block is corresponded to cascade by more than two both sides ports respectively is constituted, and the unit that is substantially isolated includes
The converter of both sides and the converter with high-frequency isolation function of centre, three dual-port modules side connects sending end respectively
The three-phase phase voltage of network, opposite side connects receiving end network three-phase line voltage respectively.
6. the flexible ring device of a kind of mixed type topological structure according to claim 5, it is characterised in that described basic
The converter of isolated location both sides is full-bridge converter, and the middle converter with high-frequency isolation function is LLC resonant converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710012054.3A CN106786722A (en) | 2017-01-06 | 2017-01-06 | A kind of flexible ring device of star-like, triangular form and mixed type topological structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710012054.3A CN106786722A (en) | 2017-01-06 | 2017-01-06 | A kind of flexible ring device of star-like, triangular form and mixed type topological structure |
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| CN106786722A true CN106786722A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710012054.3A Pending CN106786722A (en) | 2017-01-06 | 2017-01-06 | A kind of flexible ring device of star-like, triangular form and mixed type topological structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445134A (en) * | 2019-07-29 | 2019-11-12 | 南京南瑞继保工程技术有限公司 | A kind of flexibility ring device |
| CN112072639A (en) * | 2020-08-11 | 2020-12-11 | 东南大学 | Module-shared power grid flexible closed-loop controller topology |
| CN114336627A (en) * | 2020-10-10 | 2022-04-12 | 西安西电电力系统有限公司 | Flexible loop closing device based on H-bridge five-level topological structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201584899U (en) * | 2009-08-06 | 2010-09-15 | 东南大学 | Topological structure of power electronic transformer |
| CN104935063A (en) * | 2015-06-18 | 2015-09-23 | 电子科技大学 | Positive and negative pulse charging converter for storage battery |
| CN205051584U (en) * | 2015-10-08 | 2016-02-24 | 西南交通大学 | Three -phase - single -phase potential device of no frequency transformer |
-
2017
- 2017-01-06 CN CN201710012054.3A patent/CN106786722A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201584899U (en) * | 2009-08-06 | 2010-09-15 | 东南大学 | Topological structure of power electronic transformer |
| CN104935063A (en) * | 2015-06-18 | 2015-09-23 | 电子科技大学 | Positive and negative pulse charging converter for storage battery |
| CN205051584U (en) * | 2015-10-08 | 2016-02-24 | 西南交通大学 | Three -phase - single -phase potential device of no frequency transformer |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445134A (en) * | 2019-07-29 | 2019-11-12 | 南京南瑞继保工程技术有限公司 | A kind of flexibility ring device |
| CN112072639A (en) * | 2020-08-11 | 2020-12-11 | 东南大学 | Module-shared power grid flexible closed-loop controller topology |
| WO2022033185A1 (en) * | 2020-08-11 | 2022-02-17 | 东南大学 | Module-shared flexible loop closing controller topology for power grid |
| US11929624B2 (en) | 2020-08-11 | 2024-03-12 | Southeast University | Module-shared flexible loop closing controller topology for power grid |
| CN114336627A (en) * | 2020-10-10 | 2022-04-12 | 西安西电电力系统有限公司 | Flexible loop closing device based on H-bridge five-level topological structure |
| CN114336627B (en) * | 2020-10-10 | 2023-11-28 | 西安西电电力系统有限公司 | Flexible ring closing device based on H-bridge five-level topological structure |
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Application publication date: 20170531 |