CN113708377A - High-voltage asynchronous flexible interconnection device sharing direct-current bus - Google Patents
High-voltage asynchronous flexible interconnection device sharing direct-current bus Download PDFInfo
- Publication number
- CN113708377A CN113708377A CN202111077050.6A CN202111077050A CN113708377A CN 113708377 A CN113708377 A CN 113708377A CN 202111077050 A CN202111077050 A CN 202111077050A CN 113708377 A CN113708377 A CN 113708377A
- Authority
- CN
- China
- Prior art keywords
- phase
- shifting transformer
- voltage
- flexible interconnection
- converter
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
-
- 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
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
-
- 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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
-
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- 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)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a high-voltage asynchronous flexible interconnection device sharing a direct-current bus, which comprises a first phase-shifting transformer, a second phase-shifting transformer and a current transformer group sharing the direct-current bus; three-phase primary windings of the first phase-shifting transformer and the second phase-shifting transformer are respectively used for being butted with different high-voltage distribution lines, and each three-phase secondary winding of the first phase-shifting transformer is respectively and correspondingly connected with an input port of the converter group in series; each output port of the converter group is respectively and correspondingly connected with the three-phase secondary winding of the second phase-shifting transformer in series; the converter group is formed by connecting a plurality of converters in parallel between a first phase-shifting transformer and a second phase-shifting transformer in a mode of sharing a direct current bus to form flexible interconnection among different high-voltage distribution lines. The invention realizes the arbitrary dispatching and mutual support of electric energy by forming a mesh-shaped connection network through flexible interconnection between any two sections of high-voltage distribution lines.
Description
Technical Field
The invention belongs to the field of new energy and smart power grids, and particularly relates to a high-voltage asynchronous flexible interconnection device sharing a direct-current bus.
Background
At present, the prior patent applications are few about a distribution network and a multi-port flexible switch for alternating current high-voltage distribution in an industrial enterprise, but no matter an H-bridge unit series connection type high-voltage converter main loop topology or an MMC topology structure, various high-voltage multi-port flexible switches are connected in series by adopting low-voltage elements or modules to improve the capacity of the converter for outputting high voltage, so that the whole power electronic converter has high voltage, high requirements on an insulation structure, safety protection and use and maintenance of the device are met, and the heat dissipation mode is also restricted; there is also the flexible interconnection that the high voltage distribution was realized to the common generating line of individual patent application, but through a simple vary voltage realization between converter and the high voltage generating line, this will bring some other problems again, and first of all higher harmonic content is high, and power factor is also low, and second modular structure, the integrated level is low, and direct current capacitance use amount is great, and is with high costs, and third is that the cooling method is complicated.
Disclosure of Invention
Aiming at least one defect or improvement requirement in the prior art, the invention provides a high-voltage asynchronous flexible interconnection device of a common direct-current bus, wherein a common direct-current bus converter group formed by connecting a plurality of converters in parallel is arranged between high-voltage distribution lines to form flexible interconnection at two ends of the high-voltage distribution lines; a mesh connection network is formed among the high-voltage distribution lines which are flexibly interconnected, and electric energy in the system can be transferred and distributed along the mesh distribution network, so that the effects of mutual power support, mutual energy interaction, mutual voltage support and mutual emergency standby are achieved.
To achieve the above object, according to one aspect of the present invention, there is provided a high voltage asynchronous flexible interconnection device sharing a dc bus, including a first phase-shifting transformer, a second phase-shifting transformer, and a converter group sharing the dc bus;
the first phase-shifting transformer and the second phase-shifting transformer are respectively provided with a group of three-phase primary windings and a plurality of groups of three-phase secondary windings, the three-phase primary windings of the first phase-shifting transformer and the second phase-shifting transformer are respectively used for being butted with different high-voltage distribution lines, and each three-phase secondary winding of the first phase-shifting transformer is respectively and correspondingly connected in series with the input port of the converter group; each output port of the converter group is respectively and correspondingly connected with a three-phase secondary winding of the second phase-shifting transformer in series;
the converter group is formed by connecting a plurality of converters in parallel between a first phase-shifting transformer and a second phase-shifting transformer in a mode of sharing a direct current bus to form flexible interconnection among different high-voltage distribution lines.
Preferably, the converter further comprises a reactor, and each three-phase secondary winding of the first phase-shifting transformer and the second phase-shifting transformer is connected in series with the reactor and then connected with the converter group.
Preferably, the converter comprises a capacitor and an IGBT bridge module formed by at least two IGBT elements connected in series;
the upper end of the IGBT bridge module and the anode of the capacitor are connected with the anode of the low-voltage direct-current bus, and the lower end of the IGBT bridge module and the cathode of the direct-current capacitor are connected with the cathode of the low-voltage direct-current bus; and a connection point leading-out terminal between two IGBT elements connected in series in the IGBT bridge type loop is connected with the reactor.
Preferably, the converter group further comprises a controller, and the controller is used for controlling the smooth and adjustable operation of the converter group in four quadrants.
Preferably, the controller controls the converter connected to the three-phase secondary winding of the first phase-shifting transformer and the converter connected to the three-phase secondary winding of the second phase-shifting transformer to maintain operating states in opposite steps, wherein the operating states include an active input and an active output.
Preferably, the output frequencies of the inverter groups are respectively the same as the frequencies of the low-voltage dc buses connected to the inverter groups.
Preferably, in the case of active power control, the magnitude of the active power output by the converter group can be adjusted only in one direction to avoid the formation of a circulating current.
Preferably, in the case of reactive power control, the magnitude of the reactive power output by the converter group can be adjusted in two directions to meet the requirement of voltage support of the bilateral grid.
Preferably, the IGBT bridge modules are mounted on the same heat dissipation module.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) the high-voltage asynchronous flexible interconnection device sharing the direct-current bus can realize flexible connection between any two sections of lines of a power distribution network, even cross-transformer and cross-network and cross-power connection, after a plurality of flexible interconnections, a power distribution system is changed into a mesh-shaped connection network from the original radial shape, electric energy in the system can be transferred and distributed among distribution transformers along the mesh-shaped power distribution network, the functions of mutual power support, energy interaction, mutual voltage support and mutual emergency standby are realized, and the purposes of intrinsically safe power distribution of enterprises, improvement of the utilization rate of power assets and reduction of fixed electric charge are achieved.
(2) The high-voltage asynchronous flexible interconnection device sharing the direct-current bus can be applied to a high-voltage distribution network, the high-voltage is isolated by moving to the transformer, and the energy scheduling is carried out at the converter group end sharing the direct-current bus, so that the safety protection capability of the whole device is enhanced, the control, operation, protection, maintenance and the like of the device are simple and easy to implement, and the fault caused by the high-voltage operation of the power electronic converter is reduced.
(3) The high-voltage asynchronous flexible interconnection device with the common direct-current bus adopts the converter group with the common direct-current bus, the converter group adopts integrated and standardized configuration, the system is abundant, the fault-tolerant capability is strong, spare equipment elements are convenient to replace, and the integral operation is not influenced by the failure of part of the converters.
(4) According to the high-voltage asynchronous flexible interconnection device sharing the direct-current bus, the IGBT bridge type modules in the converter group are arranged on the same heat dissipation module, integrated heat dissipation can be achieved, and the structure is simple and reliable.
Drawings
Fig. 1 is a schematic structural diagram of a high-voltage asynchronous flexible interconnection device sharing a dc bus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a current transformer group according to an embodiment of the present invention;
FIG. 3 is a diagram of an example of an application of a high-voltage flexible interconnect device according to an embodiment of the present invention;
in all the figures, the same reference numerals denote the same features, in particular: 11-a first phase shifting transformer; 12-a second phase shifting transformer; 13-a converter group; 14-a direct current bus; 15-a reactor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic structural diagram of a high-voltage asynchronous flexible interconnection device of common dc buses according to this embodiment, and referring to fig. 1, the device may be applied between any two sections of ac high-voltage distribution lines in a high-voltage distribution network, and includes a first phase-shifting transformer 11, a second phase-shifting transformer 12, a low-voltage dc bus 14, and a plurality of converter groups 13 of common dc buses;
the first phase-shifting transformer 11 and the second phase-shifting transformer 12 each have a set of three-phase primary windings and a plurality of sets of three-phase secondary windings, and the three-phase secondary windings are independent of each other and are staggered with each other by a certain phase angle. Specifically, when the number of the three-phase secondary windings is n, the phase angles of the three-phase secondary windings in each group are staggered by 60/n, so that the distribution loss can be reduced, and the energy conversion efficiency can be improved. Where n is an even number greater than 2.
Three-phase primary windings of a first phase-shifting transformer 11 and a second phase-shifting transformer 12 are connected with a high-voltage distribution network through a switch cabinet and are respectively connected with any two sections of high-voltage distribution lines in the distribution network, and each three-phase secondary winding of the first phase-shifting transformer 11 corresponds to an input port of a series-connected converter group; the output ports of the converter group 13 are respectively and correspondingly connected in series with the three-phase secondary windings of the second phase-shifting transformer 12; the converter group is formed by connecting a plurality of converters with a common direct current bus in parallel between a first phase-shifting transformer 11 and a second phase-shifting transformer 12 to form flexible interconnection among different high-voltage distribution lines.
Specifically, n three-phase secondary windings of the first phase-shifting transformer 11 and the second phase-shifting transformer 12 may be connected to m sets of converters, where m is a positive integer, and the n × m converters share a low-voltage dc bus and are connected in parallel to form a converter group 13.
In a preferred embodiment, the first and second phase-shifting transformers 11 and 12 further comprise a set of low-voltage distribution windings corresponding to the three-phase primary windings, and it should be noted that the low-voltage distribution windings are also one set of three-phase secondary windings, but are not connected to a rectifier, and are used for connecting to a conventional three-phase power frequency load. The low voltage distribution winding can be used for pre-charging of the entire device, as well as a control power source.
In a preferred embodiment, the system further comprises a reactor 15, each three-phase secondary winding of the first phase-shifting transformer 11 and the second phase-shifting transformer 12 is respectively connected in series with the reactor 15 and then connected with the converter group 13, and the reactor 15 is connected between the phase-shifting transformer and the converter group and used for reactive power compensation and harmonic suppression; the main function is to compensate the influence of long line distributed capacitance and restrain the output harmonic current; the interference from the power grid can be prevented, and the pollution of harmonic current to the power grid is reduced.
Fig. 2 is a schematic structural diagram of a converter group, and referring to fig. 2, a converter group 13 is formed by a plurality of converters sharing a dc bus 14, and the converters are connected in parallel with each other, where the converters are all capable of four-quadrant operation, and each converter comprises a capacitor and an IGBT bridge circuit formed by at least two IGBT elements connected in series; the IGBT bridge circuit and the capacitor share one direct current bus 14, the upper end of the IGBT bridge circuit and the positive electrode of the capacitor are connected with the positive electrode of the direct current bus 14, and the lower end of the IGBT bridge circuit and the negative electrode of the direct current capacitor are connected with the negative electrode of the direct current bus; and a connection point leading-out terminal between two IGBT elements connected in series in the IGBT bridge type loop is connected with the reactor. The converter group adopts the integrated and standardized configuration, the system has abundant capacity and strong fault-tolerant capability, spare equipment elements are convenient to replace, and the integral operation is not influenced by the failure of part of converters.
In a preferred embodiment, all IGBT bridges are collectively mounted on the same heat sink, specifically, the heat sink is a water-cooled heat sink. Therefore, heat generated when the power electronic converter operates with high voltage can be effectively dissipated in time, the device is cooled rapidly, and fire accidents caused by heat accumulation are avoided.
When the device is in operation, when a load occurs on a line where any one of the converters 13 is located, electric energy is obtained from lines where one or more other converters connected in parallel with the converter 131 are located through the direct current bus 14, and therefore transfer and compensation of the electric energy can be achieved.
In a preferred embodiment, the output frequency of the converter group is respectively the same as the frequency of the low-voltage direct-current bus connected with the converter group, so that the frequency between the flexibly interconnected high-voltage buses can be kept the same or different to meet the use requirement, and the application of the converter group is more flexible.
In a preferred embodiment, the high-voltage asynchronous flexible interconnection device further comprises a controller, and the controller controls the smooth and adjustable operation of the converter in four quadrants. The controller controls a converter connected with three-phase secondary windings of the first phase-shifting transformer 11 and a converter connected with three-phase secondary windings of the second phase-shifting transformer 12 to respectively keep working states with opposite steps, specifically, the working states comprise active input and active output, and when the converters connected with the three-phase secondary windings of the first phase-shifting transformer work in the active input state, the converters connected with the three-phase secondary windings of the second phase-shifting transformer work in the active output state; when the converters connected with the three-phase secondary windings of the first phase-shifting transformer all work in an active output state, the converter connected with the three-phase secondary windings of the second phase-shifting transformer works in an active input state. The controllable flow of the electric power of the high-voltage buses at two ends is realized through the four-quadrant alternating current of the converter group, the damage to components in the flexible interconnection device caused by high voltage is avoided, and meanwhile, the requirements on the insulation structure, safety protection and use and maintenance of the device are reduced.
In the case of active power control, the magnitude of the active power output by the group of converters 13 can only be regulated in a single direction to avoid circulating currents. Under the condition of reactive power control, the magnitude of the reactive power output by the converter group 13 can be adjusted in two directions (two-quadrant operation), that is, when the active power is not transmitted, the converter group 13 can also perform independent reactive power capacitive inductive bidirectional adjustment to meet the requirement of voltage support of the bilateral power grid.
Therefore, the high-voltage asynchronous flexible interconnection device sharing the direct-current bus is applied to a high-voltage distribution network, the high-voltage electricity is isolated by moving to the transformer, the energy is dispatched by the low-voltage converter group sharing the direct-current bus, the safety protection capability of the whole device is enhanced, the control, operation, protection, maintenance and the like of the device are simple and easy to implement, and the fault caused by the high-voltage operation of the power electronic converter is reduced.
Fig. 3 is an application example of the high-voltage flexible interconnection device provided in this embodiment, the high-voltage flexible interconnection device is respectively connected to two segments of high-voltage buses through switches at two ends, when the high-voltage flexible interconnection device is used for internal waste heat power generation or other new energy power generation in an enterprise, when a load of the high-voltage bus becomes small, or when an overload occurs in a distribution system of a certain distribution transformer, the distribution control center calls redundant capacities of other distribution transformers by adjusting operating states of respective converters, thereby realizing mutual borrowing and removal of the capacities, realizing controllable transmission and utilization of energy, and preventing the distribution transformer from reversely transmitting power to a higher-level power grid, which causes a large amount of energy loss.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a high-pressure asynchronous flexible interconnection device who shares direct current bus which characterized in that: the converter group comprises a first phase-shifting transformer, a second phase-shifting transformer and a common direct current bus;
the first phase-shifting transformer and the second phase-shifting transformer are respectively provided with a group of three-phase primary windings and a plurality of groups of three-phase secondary windings, the three-phase primary windings of the first phase-shifting transformer and the second phase-shifting transformer are respectively used for being butted with different high-voltage distribution lines, and each three-phase secondary winding of the first phase-shifting transformer is respectively and correspondingly connected in series with the input port of the converter group; each output port of the converter group is respectively and correspondingly connected with a three-phase secondary winding of the second phase-shifting transformer in series;
the converter group is formed by connecting a plurality of converters in parallel between a first phase-shifting transformer and a second phase-shifting transformer in a mode of sharing a direct current bus to form flexible interconnection among different high-voltage distribution lines.
2. The high-voltage asynchronous flexible interconnection device of a common direct-current bus according to claim 1, further comprising a reactor, wherein each three-phase secondary winding of the first phase-shifting transformer and the second phase-shifting transformer is connected in series with the reactor and then connected with the converter group.
3. The high voltage asynchronous flexible interconnection device of a common dc bus of claim 1, wherein said current transformer comprises a capacitor and an IGBT bridge module formed by at least two IGBT elements connected in series;
the upper end of the IGBT bridge module and the anode of the capacitor are connected with the anode of the low-voltage direct-current bus, and the lower end of the IGBT bridge module and the cathode of the direct-current capacitor are connected with the cathode of the low-voltage direct-current bus; and a connection point leading-out terminal between two IGBT elements connected in series in the IGBT bridge type loop is connected with the reactor.
4. The high voltage asynchronous flexible interconnection device of a common dc bus of claim 1, further comprising a controller for controlling the smooth and adjustable operation of said converter groups in four quadrants.
5. A high voltage asynchronous flexible interconnection device for a common low voltage DC bus according to claim 4, wherein said controller controls the converter connected to the three phase secondary winding of the first phase shifting transformer and the converter connected to the three phase secondary winding of the second phase shifting transformer to maintain operating conditions in steps opposite to each other, said operating conditions including active input and active output.
6. A high voltage asynchronous flexible interconnection device of common dc bus according to claim 1, characterized in that the output frequency of said inverter group is the same as the frequency of the respective connected low voltage dc bus.
7. The high voltage asynchronous flexible interconnection device of common dc bus of claim 1, wherein in case of active power control, the magnitude of active power output by said converter group can be regulated only in one direction to avoid forming a circulating current.
8. The high-voltage asynchronous flexible interconnection device of common direct-current buses of claim 1, wherein in case of reactive power control, the magnitude of reactive power output by the converter groups can be adjusted in two directions to meet the requirement of double-side grid voltage support.
9. A high voltage asynchronous flexible interconnection device of a common dc bus according to claim 3, wherein said IGBT bridge modules are mounted on the same heat sink module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111077050.6A CN113708377A (en) | 2021-09-10 | 2021-09-10 | High-voltage asynchronous flexible interconnection device sharing direct-current bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111077050.6A CN113708377A (en) | 2021-09-10 | 2021-09-10 | High-voltage asynchronous flexible interconnection device sharing direct-current bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113708377A true CN113708377A (en) | 2021-11-26 |
Family
ID=78660436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111077050.6A Pending CN113708377A (en) | 2021-09-10 | 2021-09-10 | High-voltage asynchronous flexible interconnection device sharing direct-current bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113708377A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336933A (en) * | 2021-12-22 | 2022-04-12 | 南京麦格安倍电气科技有限公司 | Medium-voltage linear uninterrupted flexible alternating current-direct current hybrid power supply system |
| CN114759607A (en) * | 2022-06-15 | 2022-07-15 | 国网湖北省电力有限公司经济技术研究院 | Multi-feeder flexible switching topological structure and flexible switching method |
-
2021
- 2021-09-10 CN CN202111077050.6A patent/CN113708377A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336933A (en) * | 2021-12-22 | 2022-04-12 | 南京麦格安倍电气科技有限公司 | Medium-voltage linear uninterrupted flexible alternating current-direct current hybrid power supply system |
| CN114759607A (en) * | 2022-06-15 | 2022-07-15 | 国网湖北省电力有限公司经济技术研究院 | Multi-feeder flexible switching topological structure and flexible switching method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3651305A1 (en) | Chained multi-port grid-connected interface apparatus and control method | |
| EP4131762A1 (en) | Interconnected co-phase traction power supply system based on four-port modular multilevel converter | |
| Friedrich | Modern HVDC PLUS application of VSC in modular multilevel converter topology | |
| Reed et al. | Advantages of voltage sourced converter (VSC) based design concepts for FACTS and HVDC-link applications | |
| EP2290799A1 (en) | Bi-directional multilevel AC-DC converter arrangements | |
| EP3387745B1 (en) | System and method for integrating energy storage into modular power converter | |
| CN100533166C (en) | Current converter test circuit | |
| CN210183018U (en) | Grid-connected power supply system and grid-connected device of data center | |
| CN113708377A (en) | High-voltage asynchronous flexible interconnection device sharing direct-current bus | |
| CN101938216A (en) | Power transmission method and power transmission apparatus | |
| CN103001242A (en) | HVDC (high voltage direct current controller) and UPFC (unified power flow controller) system based on modularized multi-level converter | |
| WO2018098673A1 (en) | Bipolar vsc-hvdc and upfc hybrid topology structure and operating method therefor | |
| CN104734134B (en) | A kind of inverter earthed system | |
| CN213585162U (en) | AC/DC power supply structure of data center | |
| CN112886594A (en) | AC/DC power supply structure of data center | |
| CN110635468A (en) | Open sea wind power plant topological structure and control method thereof | |
| CN103633652A (en) | Subarea power grid interconnection system and method | |
| CN110729717B (en) | Parallel traction compensation system for double full-bridge back-to-back converter | |
| Bose et al. | Topological investigation on interlinking converter in a hybrid microgrid | |
| CN113726137B (en) | conversion device | |
| CN211428926U (en) | Power transfer device between lines suitable for multiunit multi-circuit line | |
| CN113328454B (en) | Flexible multi-state switch, flexible alternating current-direct current interconnection system and control method | |
| CN211456702U (en) | Hybrid compensation type inter-line power transfer device | |
| CN112202173B (en) | Medium-voltage bus flexible interconnection power distribution network system | |
| Dai et al. | EMS experience of reactive power control for LCC based HVDC system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |