CN217388243U - Multiport energy router - Google Patents
Multiport energy router Download PDFInfo
- Publication number
- CN217388243U CN217388243U CN202221186498.1U CN202221186498U CN217388243U CN 217388243 U CN217388243 U CN 217388243U CN 202221186498 U CN202221186498 U CN 202221186498U CN 217388243 U CN217388243 U CN 217388243U
- Authority
- CN
- China
- Prior art keywords
- current
- direct current
- converter
- direct
- alternating current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model discloses a multiport energy router, which comprises a first AC/DC converter, a second AC/DC converter, a third AC/DC converter and a DC transformation module; one side of the first alternating current-direct current converter is connected with a first alternating current system, a direct current line on the other side of the first alternating current-direct current converter is connected with one side of the second alternating current-direct current converter, and the other side of the second alternating current-direct current converter is connected with a third alternating current system; one side of the third AC-DC converter is connected with the second AC system, a DC line on the other side of the third AC-DC converter is connected with the DC transformation module, and the other side of the DC transformation module is connected with the DC system; and the direct current line on the other side of the first alternating current-direct current converter is connected with the direct current line on the other side of the third alternating current-direct current converter through a lead, and the two leads are connected with the same phase line. The utility model provides a converter transformer bulky, can bring the problem of extra loss and noise.
Description
Technical Field
The utility model relates to a distribution network equipment, concretely relates to multiport energy router.
Background
In recent years, with the increase of power consumption of distribution networks, the original distribution network cannot meet the requirements of users, and the requirements for power consumption and power consumption reliability are required to be met through modes of capacity expansion, asynchronous networking, new energy power generation access and the like. The multi-port energy router is the key device for solving the problems, can be used for networking asynchronous power grids with different voltage levels through a plurality of ports, and is beneficial to access of new energy sources such as photovoltaic and energy storage through flexible electric energy conversion.
Because distribution network occasions have requirements on the occupied area of equipment, a converter transformer is generally connected to each alternating current port by adopting the existing multi-port energy router scheme and is used for converting voltage and realizing isolation. Because the transformer is generally large in size, and simultaneously brings loss and noise problems, the transformer is not friendly to be applied to power distribution network occasions, and therefore the problem needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the problem among the above-mentioned prior art, provide a multiport energy router, need not to insert converter transformer at the interchange port, can satisfy the needs that module voltage charges when multiport energy router trouble.
In order to achieve the above object, the present invention provides the following technical solutions:
a multi-port energy router comprises a first alternating current-direct current converter, a second alternating current-direct current converter, a third alternating current-direct current converter and a direct current transformation module; one side of the first alternating current-direct current converter is connected with a three-phase first alternating current system, a two-phase direct current line on the other side of the first alternating current-direct current converter is connected with one side of the second alternating current-direct current converter, and the other side of the second alternating current-direct current converter is connected with a three-phase third alternating current system; one side of the third AC-DC converter is connected with a three-phase second AC system, a two-phase DC line at the other side of the third AC-DC converter is connected with a DC transformation module, and the other side of the DC transformation module is connected with a two-phase DC system; and the two-phase direct current line on the other side of the first alternating current-direct current converter is connected with the two-phase direct current line on the other side of the third alternating current-direct current converter through a lead, and the two leads are respectively connected with the same-phase lines in the two-phase direct current lines.
As an optimized scheme of the multi-port energy router of the present invention, the two-phase dc lines of the first ac/dc converter opposite side are connected to the ground line through the ground switch, respectively.
Further, as a preferred solution of the multi-port energy router of the present invention, a dc-side grounding resistor is disposed between the grounding switch and the ground wire on the two-phase dc line.
As a preferred scheme of the utility model discloses multiport energy router, the double-phase direct current circuit of first alternating current-direct current converter opposite side all connects one side of second alternating current-direct current converter through direct current breaker.
Further, as the utility model discloses a preferred scheme of multiport energy router, wire tie point has between the double-phase direct current circuit of third alternating current-direct current converter opposite side and the double-phase direct current circuit of first alternating current-direct current converter opposite side, direct current breaker sets up between wire tie point and the second alternating current-direct current converter.
As the utility model discloses multiport energy router's an preferred scheme, first alternating current-direct current converter, second alternating current-direct current converter, third alternating current-direct current converter set up on the MMC transverter, and the MMC transverter adopts the full-bridge module, utilizes the negative pressure that the full-bridge module provided, realizes connecting through a direct current system between the different alternating current systems.
As a preferred embodiment of the multi-port energy router of the present invention, the first ac system, the second ac system, and the third ac system have different voltage levels.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
present multiport energy router generally adopts the scheme of transformer with the topological transverter of MMC, exists every interchange port and adopts converter transformer, and is bulky, still can bring the problem of certain loss and noise simultaneously, compares under, the utility model provides a first alternating current system is connected respectively through first alternating current-direct current converter, second alternating current-direct current converter, third alternating current-direct current converter and direct current transformation module to this multiport energy router, second alternating current system, third alternating current system and direct current system adopt no transformer scheme, have effectively solved converter transformer bulky, can bring extra loss and the problem of noise.
Further, the utility model discloses the double-phase direct current circuit of first alternating current-direct current converter opposite side is connected with the ground wire through earthing switch respectively, all is provided with direct current side ground resistance between earthing switch on the double-phase direct current circuit and the ground wire, has adopted the big resistance ground solution of direct current side that can cut, can solve the ground connection problem of no transformer multiport system.
Further, the utility model discloses the MMC transverter adopts the full-bridge module, utilizes the negative pressure that the full-bridge module provided, realizes connecting through a direct current system between the different AC system, adopts the full-bridge module can connect the AC electric network of different voltage classes.
Further, the utility model discloses a scheme that the direct current side of high pressure interchange converter valve disposes direct current circuit breaker solves the problem that multiport energy router charges for module voltage when breaking down, ensures the safety of equipment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments are briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and those skilled in the art can also obtain other related drawings without inventive labor.
Fig. 1 is a schematic diagram of a wiring structure of a multiport energy router according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an MMC current converter according to an embodiment of the present invention employing a full-bridge module;
in the drawings: 1-a first ac-dc converter; 2-a second ac-dc converter; 3-a third ac/dc converter; 4-a direct current transformation module; 5-a first communication system; 6-a second communication system; 7-a third communication system; 8-a direct current system; 9-a direct current breaker; 10-a grounding switch; 11-direct current side ground resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Based on the embodiments in the present invention, a person skilled in the art can also perform a plurality of simple modifications and decorations without creative work, and all other embodiments obtained belong to the protection scope of the present invention.
Referring to fig. 1, a multi-port energy router according to an embodiment of the present invention includes a first ac/dc converter 1, a second ac/dc converter 2, a third ac/dc converter 3, and a dc transformer module 4. One side of the first AC/DC converter 1 is connected with a three-phase first AC system 5, the two-phase DC line on the other side of the first AC/DC converter 1 is connected with one side of the second AC/DC converter 2, and the other side of the second AC/DC converter 2 is connected with a three-phase third AC system 7. In this embodiment, the two-phase dc lines on the other side of the first ac/dc converter 1 are connected to the ground line through the grounding switch 10, and dc-side grounding resistors 11 are disposed between the grounding switch 10 and the ground line on the two-phase dc lines. Furthermore, the two-phase dc lines on the other side of the first ac/dc converter 1 are connected to one side of the second ac/dc converter 2 via a dc breaker 9. One side of the third AC/DC converter 3 is connected with a three-phase second AC system 6, a two-phase DC line at the other side of the third AC/DC converter 3 is connected with the DC transformation module 4, and the other side of the DC transformation module 4 is connected with a two-phase DC system 8. And connecting the two-phase direct current line on the other side of the first alternating current-direct current converter 1 with the two-phase direct current line on the other side of the third alternating current-direct current converter 3 through a lead, wherein the two leads are respectively connected with the same-phase line in the two-phase direct current lines. And a lead connecting point is arranged between the two-phase direct-current line on the other side of the third alternating-current/direct-current converter 3 and the two-phase direct-current line on the other side of the first alternating-current/direct-current converter 1, and the direct-current breaker 9 is arranged between the lead connecting point and the second alternating-current/direct-current converter 2. The utility model discloses first alternating current-direct current converter 1, second alternating current-direct current converter 2, third alternating current-direct current converter 3 in the above-mentioned embodiment set up on the MMC transverter, wherein, first alternating current system 5, second alternating current system 6 and third alternating current system 7 have different voltage levels, make the MMC transverter adopt the full-bridge module, utilize the negative pressure that the full-bridge module provided, realize connecting through a direct current system between the different alternating current system.
The system of the utility model adopts the grounding mode of the large resistor on the direct current side which can be cut off. In the case where the ac side ground is already present in the upper ac system, the dc side ground resistance may be disconnected when the ac system is connected. Meanwhile, due to the fact that the four-port operation mode is multiple, under the island operation working condition that the alternating current load is supplied with power through low-voltage direct current photovoltaic or energy storage, an island system cannot be connected with an original grounding device on the alternating current side, and reliable ground potential needs to be provided through grounding of the direct current side.
As shown in fig. 2, since the multi-port energy router needs to be connected to ac systems of different voltage classes, when a single-phase ground fault occurs at an ac port with a higher voltage, the MMC converter at the faulty port is locked to protect the system, but when the single-phase ground fault occurs at an ac port with a higher voltage, the phase-to-ground voltage of a non-faulty phase of the system is changed from the phase voltage to the line voltage, and the voltage difference between the line voltage and the dc voltage exceeds the sum of the capacitor voltages of the bridge arm modules, so that the capacitors of the modules are continuously charged after the system is locked, further increase of the capacitor voltage of the modules is caused, and the safety of the device is threatened.
To sum up, the utility model adopts the scheme without transformer, solving the problems of large volume and extra loss and noise of the converter transformer; the grounding problem of a transformer-free multi-port system is solved by adopting a grounding scheme of a large resistor on a switchable direct current side; the full-bridge module can be connected with alternating current power grids with different voltage levels; the scheme that the direct current side of the high-voltage alternating current converter valve is provided with the direct current breaker is adopted, and the problem that the module voltage is charged when the multi-port energy router fails is solved.
The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (7)
1. A multi-port energy router, characterized by: the system comprises a first alternating current-direct current converter (1), a second alternating current-direct current converter (2), a third alternating current-direct current converter (3) and a direct current transformation module (4); one side of the first alternating current-direct current converter (1) is connected with a three-phase first alternating current system (5), a two-phase direct current line on the other side of the first alternating current-direct current converter (1) is connected with one side of the second alternating current-direct current converter (2), and the other side of the second alternating current-direct current converter (2) is connected with a three-phase third alternating current system (7); one side of the third alternating current-direct current converter (3) is connected with a three-phase second alternating current system (6), a two-phase direct current line on the other side of the third alternating current-direct current converter (3) is connected with the direct current transformation module (4), and the other side of the direct current transformation module (4) is connected with a two-phase direct current system (8); the two-phase direct current line on the other side of the first alternating current-direct current converter (1) is connected with the two-phase direct current line on the other side of the third alternating current-direct current converter (3) through a lead, and the two leads are respectively connected with the same-phase line in the two-phase direct current lines.
2. The multi-port energy router of claim 1, wherein: and the two-phase direct current line on the other side of the first alternating current-direct current converter (1) is connected with the ground wire through the grounding switch (10) respectively.
3. The multi-port energy router of claim 2, wherein: and direct-current side grounding resistors (11) are arranged between the grounding switch (10) on the two-phase direct-current circuit and the ground wire.
4. The multi-port energy router of claim 1, wherein: and two-phase direct current lines on the other side of the first alternating current-direct current converter (1) are connected with one side of the second alternating current-direct current converter (2) through a direct current breaker (9).
5. The multi-port energy router of claim 4, wherein: and a lead connecting point is arranged between the two-phase direct-current line on the other side of the third alternating-current/direct-current converter (3) and the two-phase direct-current line on the other side of the first alternating-current/direct-current converter (1), and the direct-current circuit breaker (9) is arranged between the lead connecting point and the second alternating-current/direct-current converter (2).
6. The multi-port energy router of claim 1, wherein: first alternating current-direct current converter (1), second alternating current-direct current converter (2), third alternating current-direct current converter (3) set up on the MMC transverter, and the MMC transverter adopts the full-bridge module, utilizes the negative pressure that the full-bridge module provided, realizes connecting through a direct current system between the different alternating current systems.
7. The multi-port energy router of claim 1, wherein: the first alternating current system (5), the second alternating current system (6) and the third alternating current system (7) have different voltage levels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221186498.1U CN217388243U (en) | 2022-05-17 | 2022-05-17 | Multiport energy router |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221186498.1U CN217388243U (en) | 2022-05-17 | 2022-05-17 | Multiport energy router |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217388243U true CN217388243U (en) | 2022-09-06 |
Family
ID=83087941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221186498.1U Active CN217388243U (en) | 2022-05-17 | 2022-05-17 | Multiport energy router |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217388243U (en) |
-
2022
- 2022-05-17 CN CN202221186498.1U patent/CN217388243U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104539042B (en) | A kind of uninterruptible power system | |
| Li et al. | Recent developments in HVDC transmission systems to support renewable energy integration | |
| KR101783504B1 (en) | Converter for hvdc transmission and reactive power compensation | |
| CN110867884B (en) | Energy consumption module, offshore wind power flexible direct current outgoing system and fault ride-through strategy | |
| WO2012075610A1 (en) | Cascade converter station and multi-end cascade hvdc power transmission system | |
| CN107786099A (en) | A kind of highly reliable commutator transformer system of segmentation more and its control method | |
| CN106787876A (en) | A kind of modularization multi-level converter and its high pressure valve group fault to ground guard method | |
| EP3446400A1 (en) | Converter arrangement | |
| CN110108986A (en) | DC grid fault current complex frequency domain calculation method | |
| CN211089218U (en) | High-capacity high-reliability rapid power supply switching device | |
| CN215835111U (en) | Direct-current ice melting system applied to overhead ground wire and direct-current ice melting equipment thereof | |
| CN214314552U (en) | Multifunctional multiport hybrid direct current breaker | |
| CN213585598U (en) | Multi-port power electronic transformer topological structure and alternating current-direct current micro-grid system thereof | |
| CN112865046A (en) | Multifunctional multiport hybrid direct current breaker and control method | |
| CN211958778U (en) | Flexible direct current back-to-back system | |
| CN107887892A (en) | A kind of high voltage DC breaker allocation plan in flexible power network | |
| CN217388243U (en) | Multiport energy router | |
| CN115552755A (en) | Fault protection device | |
| EP3416256B1 (en) | High voltage direct current converter harmonic filtering and protection system | |
| CN113572189A (en) | Bipolar flexible direct current system for offshore wind power and transformer fault switching method thereof | |
| CN211456702U (en) | Hybrid compensation type inter-line power transfer device | |
| CN113258572B (en) | Flexible multi-state switch and control method | |
| CN207475411U (en) | A kind of more highly reliable commutator transformer systems of segmentation | |
| CN220254367U (en) | Cross-voltage-class two-port converter without transformer | |
| CN218482666U (en) | Unipolar flexible direct-current power transmission system and bipolar flexible direct-current power transmission system comprising damping module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230629 Address after: 710075 No.2, Xifu Road, West Third Ring Road, high tech Development Zone, Xi'an City, Shaanxi Province Patentee after: XI'AN XD POWER SYSTEMS Co.,Ltd. Patentee after: Xi'an Xidian Power Electronics Co.,Ltd. Patentee after: CHINA XD ELECTRIC Co.,Ltd. Address before: 710075 No.2, Xifu Road, West Third Ring Road, high tech Development Zone, Xi'an City, Shaanxi Province Patentee before: XI'AN XD POWER SYSTEMS Co.,Ltd. Patentee before: CHINA XD ELECTRIC Co.,Ltd. |
|
| TR01 | Transfer of patent right |