CN111463786B - Power consumption enterprise internal flexible networking system with multiple distribution transformers - Google Patents
Power consumption enterprise internal flexible networking system with multiple distribution transformers Download PDFInfo
- Publication number
- CN111463786B CN111463786B CN202010323811.0A CN202010323811A CN111463786B CN 111463786 B CN111463786 B CN 111463786B CN 202010323811 A CN202010323811 A CN 202010323811A CN 111463786 B CN111463786 B CN 111463786B
- Authority
- CN
- China
- Prior art keywords
- distribution
- power
- bus
- converter
- bidirectional
- 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
-
- 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
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc 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
- H02J3/34—Arrangements for transfer of electric power between networks of substantially different frequency
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses an internal flexible networking system of a power enterprise with multiple distribution transformers, which comprises a plurality of distribution transformers, wherein the low-voltage side of each distribution transformer is connected with a power supply bus to distribute power for a power load through the power supply bus; the power supply also comprises a first bidirectional converter; the alternating current side port of each first bidirectional converter is electrically connected with the power supply bus corresponding to one distribution transformer, and the direct current side ports of the first bidirectional converters are interconnected through the direct current buses, so that a mesh-shaped distribution network is formed among the distribution transformers; a mesh-shaped connection network is formed among a plurality of distribution transformers, each distribution transformer can be flexibly connected with each other, electric energy in the system can be transferred and distributed among the distribution transformers along the mesh-shaped distribution network, mutual power support, mutual energy interaction, mutual voltage support and mutual emergency standby are achieved, enterprise distribution safety is guaranteed, and electric power asset utilization rate is improved.
Description
Technical Field
The invention belongs to the technical field of smart power grids, and particularly relates to a flexible networking system in a power utilization enterprise with multiple distribution transformers.
Background
The power supply and distribution system generally comprises a high-voltage distribution substation, a high-voltage distribution line, a low-voltage substation, a low-voltage distribution line and electric equipment. According to the voltage level provided by a public power grid, primary transformation or secondary transformation may be required for the power consumption of an enterprise at present; the one-time transformation is to reduce the voltage of 6-10 KV provided by a public power grid to 380/220V, and the electric energy is directly distributed to each low-voltage electric equipment for use; the secondary transformation needs to firstly reduce the voltage of 35-110 KV provided by a public power grid to 6-10 KV, then reduce the voltage of 6-10 KV to 380/220V, and then distribute the voltage to each low-voltage electric device for use.
Fig. 1 is a structural diagram of an electric power enterprise power grid system based on multiple distribution transformers, and referring to fig. 1, a public power grid is connected to a high/medium voltage cabinet of the electric power grid system through an incoming line 1, the high/medium voltage cabinet is connected with a plurality of distribution transformers 2 through a distribution line, and each distribution transformer 2 converts the voltage output by the high/medium voltage cabinet into 380/220V voltage to respectively supply power to a plurality of electric loads 5 of power and lighting lamps; as the power utilization facilities of enterprises are continuously updated along with the increasingly developed social science and technology, higher requirements on the power supply reliability are required.
In the current enterprise power grid system for multiple distribution transformers, all distribution transformers run independently and are not connected frequently, the whole distribution system is in a radial structure, and if part of the distribution transformers are in fault and power failure, multiple power loads connected with the distribution transformers and connected with the distribution transformers are stopped for a short time or a long time; in addition, when loads among different distribution transformers are uneven, an effective means for redistributing electric energy is not provided; there is no other means of ensuring distribution safety other than cutting off part of the electrical load to reduce the load on the distribution transformer. Although a few enterprises adopt a mode that partial low-voltage buses are directly operated in parallel, the operation mode has the following problems: firstly, the situation of uneven distribution may occur between two distribution transformers, and the distribution transformer with multiple output is easy to break down; and secondly, once one of the distribution transformers fails, the whole distribution system is completely broken down.
Disclosure of Invention
Aiming at least one defect or improvement requirement in the prior art, the invention provides a flexible networking system in an electric enterprise with multiple distribution transformers, wherein each distribution transformer is provided with at least one first bidirectional converter, an alternating current side port of each first bidirectional converter is electrically connected with a power supply bus corresponding to one distribution transformer, and direct current side ports of the first bidirectional converters are interconnected through a direct current bus, so that a mesh connection network is formed among the multiple distribution transformers in the system; each distribution transformer can be flexibly connected with each other, and electric energy in the system can be transferred and distributed among the distribution transformers along a grid-shaped distribution network, so that the effects of mutual power support, mutual energy interaction, mutual voltage support and mutual emergency standby are achieved.
In order to achieve the above object, according to one aspect of the present invention, there is provided a flexible networking system inside an electric enterprise with multiple distribution transformers, including multiple distribution transformers, where a low-voltage side of each distribution transformer is connected to a power supply bus to supply power to an electric load through the power supply bus; the networking system also comprises a plurality of first bidirectional converters;
the alternating current side port of each first bidirectional converter is electrically connected with the power supply bus corresponding to one distribution transformer, and the direct current side ports of the first bidirectional converters are interconnected through the direct current buses; a mesh connection network capable of supplying power and transferring energy is formed among the distribution transformers through a plurality of first bidirectional converters and the direct current bus.
Preferably, when any one of the distribution transformers is overloaded, the flexible networking system in the power enterprise obtains electric energy from the other distribution transformers through the first bidirectional converter and the dc bus connected to the distribution transformer to supply power to the power supply bus connected to the distribution transformer, so as to realize electric energy transfer and compensation.
Preferably, in the flexible networking system in the power enterprise, an ac side port of each first bidirectional converter is electrically connected to the power supply bus corresponding to one distribution transformer through an isolation transformer, and a protection switch is further disposed between the isolation transformer and the power supply bus.
Preferably, in the flexible networking system in the electric enterprise, the first bidirectional converter is a bidirectional converter with controllable AC/DC direct current side and four-quadrant operation on alternating current side.
Preferably, in the flexible networking system in the power enterprise, the power supply bus corresponding to each distribution transformer is connected to a plurality of first bidirectional converters.
Preferably, in the flexible networking system in the power consumption enterprise, the dc bus is further connected with at least one energy storage converter, and the energy storage converters are interconnected with the first bidirectional converters through the dc bus.
Preferably, in the flexible networking system in the power consumption enterprise, the energy storage converter is a bidirectional converter with controllable DC/DC voltage, and the energy storage converter realizes control and regulation of the DC bus voltage and time domain regulation of the power distribution network through planned charging and discharging.
Preferably, the flexible networking system inside the power utilization enterprise further comprises at least one second bidirectional converter, a first side port of the second bidirectional converter is connected to the direct current bus, and a second side port of the second bidirectional converter is used as an external port for butting against the distributed new energy.
Preferably, in the above flexible networking system in an electric enterprise, an isolation transformer and a protection switch are further arranged between the second side port of the second bidirectional converter and the external port.
Preferably, in the flexible networking system in the power consumption enterprise, a port for butting a direct current power supply or a power consumption load is reserved on the direct current bus.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) the invention provides a flexible networking system in a power enterprise of a multi-distribution transformer, which is characterized in that at least one first bidirectional converter is configured for each distribution transformer, an alternating current side port of each first bidirectional converter is electrically connected with a power supply bus corresponding to one distribution transformer, and direct current side ports of the first bidirectional converters are interconnected through direct current buses, so that a plurality of distribution transformers in the system form a mesh connection network; each distribution transformer can be flexibly connected with each other, electric energy in the system can be transferred and distributed among the distribution transformers along a grid-shaped distribution network, functions of mutual power support, energy interaction, mutual voltage support and mutual emergency standby are achieved, and the purposes of intrinsically safe enterprise power distribution, improvement of electric power asset utilization rate and reduction of fixed electric charge are achieved.
(2) According to the flexible networking system in the power utilization enterprise of the multi-distribution transformer, the direct current bus is also connected with at least one energy storage converter, and the energy storage converters are interconnected with the first bidirectional converters through the direct current bus to realize electric energy migration; the energy storage converter performs planned charging and discharging on an energy storage battery arranged in the energy storage converter, and the energy storage battery is charged when the power load is low or the electricity price is low, so that redundant electric quantity is collected; when the power load is high, the power price is high or the peak power utilization is performed, the energy storage battery discharges to supplement the power distribution capacity for the power distribution network, so that the power supply pressure of the power distribution system is relieved.
(3) According to the flexible networking system in the power utilization enterprise of the multi-distribution transformer, the distributed new energy is connected into the flexible networking system in the power utilization enterprise through the second bidirectional converter and the direct current bus, electric energy converted by the new energy is connected into the direct current bus through the second bidirectional converter, and then is supplied to the power supply bus in the low-voltage cabinet through the first bidirectional converters, so that a new energy power supply solution is provided for power utilization loads before conventional electric energy is removed.
(4) According to the flexible networking system in the power utilization enterprise of the multi-distribution transformer, the port for butting a direct-current power supply or a power utilization load is reserved on the direct-current bus; when the power supply port in the low-voltage cabinet is insufficient, the power load can be accessed to a power distribution system through the port on the direct-current bus to get power; when the individual distribution transformer is overloaded, in addition to getting electricity from other distribution transformers, other direct current power supplies connected to the direct current bus can also provide electric energy for the overloaded distribution transformer, and the overload phenomenon of the overloaded distribution transformer is relieved through electric energy compensation.
Drawings
FIG. 1 is a schematic diagram of a power grid system of a power utility enterprise based on multiple distribution transformers;
fig. 2 is a schematic structural diagram of an internal flexible networking system of a power consumption enterprise with multiple distribution transformers according to an embodiment of the present invention;
fig. 3 is a schematic diagram comparing a radial power distribution network and a mesh power distribution network provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an internal flexible networking system of a power consumption enterprise with multiple distribution transformers according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of an internal flexible networking system of a power consumption enterprise with multiple distribution transformers according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of a preferred example of an internal flexible networking system of a power consumption enterprise according to an embodiment of the present invention
In all the figures, the same reference numerals denote the same features, in particular: 1-feeding wire; 2-a distribution transformer; 3-a first bidirectional converter; 4-low voltage bus; 5-power load; 6-direct current bus; 7-an isolation transformer; 8-a protection switch; 9-an energy storage converter; 10-a second bidirectional converter; 11. 12-port.
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.
Example one
Fig. 2 is a schematic structural diagram of an internal flexible networking system of a power consumption enterprise with multiple distribution transformers provided in this embodiment, where the present embodiment takes a distribution system using a primary voltage transformation as an example for description; referring to fig. 2, the internal flexible networking system of the power consumption enterprise comprises a high-voltage cabinet, n distribution transformers 2, low-voltage cabinets with the same number as the distribution transformers 2, and first bidirectional converters 3, wherein n is a natural number greater than 1, and the value of n depends on the number and position distribution of power consumption loads inside the power consumption enterprise; 6 ~ 10KV voltage that public electric network provided inserts the high-voltage board through the distribution lines, then reduces to 380/220V voltage through distribution transformer 2 and carries to corresponding low-voltage cabinet, and the low pressure side of every distribution transformer 2 links to each other with the low-voltage bus 4 in the low-voltage cabinet, and each power consumption load 5 inserts this low-voltage bus 4 and gets the electricity. The ac side port of each first bidirectional converter 3 is electrically connected to the low voltage bus 4 corresponding to one distribution transformer 2, and the dc side ports of the first bidirectional converters 3 are interconnected by the dc bus 6, so that a mesh distribution network is formed among the distribution transformers 2.
Fig. 3 is a schematic diagram comparing the radial distribution network and the mesh distribution network provided in this embodiment, the left diagram in fig. 3 is a distribution network of an enterprise power grid system for multiple distribution transformers in the prior art, each node in the diagram represents a distribution transformer 2, it can be seen that the distribution network extends radially with the distribution transformer 2 as a node, there is no constant connection between the distribution transformers 2 located at the same voltage level, and once a certain distribution transformer 2 fails, all the other distribution transformers 2 and the electrical loads 5 connected to the failed distribution transformer 2 are broken down; the right figure shows the meshed distribution network provided in the present embodiment, in which only six distribution transformers 2 are shown, so that each mesh presents a hexagon, each vertex of the hexagon represents one distribution transformer 2, and each side represents a dc bus 6 and at least two first bidirectional converters 3 connecting two adjacent distribution transformers 2 in series; the enterprise power distribution system formed in the way is like a porous grid-shaped power distribution network, each power distribution transformer 2 can be flexibly connected with each other, electric energy in the system can be transferred and distributed among the power distribution transformers 2 along the grid-shaped power distribution network, the functions of mutual power support, energy interaction, mutual voltage support and mutual emergency standby are achieved, and the problems of the current radial power distribution system are well solved.
In operation, when any one of the distribution transformers 2 is overloaded, the first bidirectional converter 3 and the dc bus 6 connected to the distribution transformer 2 obtain electric energy from the other distribution transformers 2 to supply the electric energy to the low-voltage bus 4 connected to the distribution transformer 2, so as to implement electric energy transfer and compensation. Specifically, when one or more distribution transformers 2 in the distribution network are overloaded, since the plurality of distribution transformers 2 form a mesh distribution network through the corresponding first bidirectional converters 3 and the corresponding direct current buses 6, the distribution control center calls the redundant capacity on the low-voltage buses 4 corresponding to other distribution transformers 2 by adjusting the working state of each first bidirectional converter 3 in the mesh distribution network, so as to realize mutual borrowing and removal of the capacity; the trend of the electric energy capacity is that the borrowed redundant capacity firstly converts alternating current electric energy into direct current electric energy through the first bidirectional converter 3 corresponding to other distribution transformers 2, the direct current electric energy is transmitted to the first bidirectional converter 3 corresponding to the overloaded distribution transformer 2 through the direct current bus 6, and the direct current electric energy is converted into the alternating current electric energy by the first bidirectional converter 3 and then is output to the corresponding low-voltage bus 4, so that the electric energy transfer is realized.
An alternating current side port of each first bidirectional converter 3 is electrically connected with a low-voltage bus 4 corresponding to one distribution transformer 2 through an isolation transformer 7, and a protection switch 8 is further arranged between the isolation transformer 7 and the low-voltage bus 4.
In this embodiment, only one first bidirectional converter 3 is connected to the low-voltage bus 4 corresponding to each distribution transformer 2, but actually, the low-voltage bus 4 corresponding to each distribution transformer 2 may be connected to a plurality of first bidirectional converters 3, the number of the first bidirectional converters 3 connected to the same low-voltage bus 4 is not particularly limited, and the plurality of first bidirectional converters 3 jointly play a role in electric energy migration.
The first bidirectional converter 3 is a bidirectional converter with controllable AC/DC direct current side and four-quadrant operation on the alternating current side, and realizes alternating current-direct current bidirectional conversion of electric energy; the bidirectional converter can realize bidirectional energy transfer between the direct current bus 6 and the alternating current power grid and bidirectional reactive power regulation on the alternating current side.
Example two
Fig. 4 is a schematic structural diagram of an internal flexible networking system of an electric enterprise with multiple distribution transformers 2 according to this embodiment, and as shown in fig. 4, compared with the first embodiment, the internal flexible networking system of an electric enterprise according to this embodiment further includes at least one energy storage converter 9 connected to a dc bus 6, where the energy storage converter 9 is interconnected with each first bidirectional converter 3 through the dc bus 6; the energy storage converter 9 is a bidirectional converter with controllable DC/DC voltage, and the energy storage converter 9 is used to realize the management and control adjustment of the voltage of the DC bus 6 and the time domain adjustment of the power distribution network, and perform planned charging and discharging on the energy storage battery built in the energy storage converter 9, for example, the energy storage battery is charged when the power load is low or the power price is low, and the energy storage battery is discharged to supplement the power distribution capacity for the power distribution network when the power load is high, the power price is high or the peak power consumption is performed.
EXAMPLE III
Fig. 5 is a schematic structural diagram of an internal flexible networking system of an electric enterprise with multiple distribution transformers 2 provided in this embodiment, and as shown in fig. 5, compared with the first embodiment, the internal flexible networking system of an electric enterprise provided in this embodiment further includes at least one second bidirectional converter 10, where the second bidirectional converter 10 may be an AC/DC bidirectional converter with controllable DC side and four-quadrant operation AC side, or may be a DC/DC bidirectional converter with controllable voltage; one side port of the second bidirectional converter 10 is connected to the direct current bus 6, and the other side port is used as a port 11 for connecting different forms of distributed new energy sources. Electric energy provided by the distributed new energy is firstly connected into an internal flexible networking system of an electric enterprise through the second bidirectional converter 10 and the direct current bus 6, and then is supplied to the low-voltage bus 4 in the low-voltage cabinet through the first bidirectional converters 3, so that new energy electric energy is provided for the electric load 5.
In this embodiment, the distributed new energy includes power generation devices in various energy forms such as photovoltaic power generation, wind power generation, biomass power generation, and the like; in the practical application process, an isolation transformer 7 and a protection switch 8 are arranged between each second bidirectional converter 10 and the distributed new energy source.
As a preferred example of any one of the above embodiments, a port 12 for docking a dc power supply or an electrical load is further reserved on the dc bus 6 of the flexible networking system inside the electrical enterprise; referring to fig. 6, when the power supply port in the low-voltage cabinet is insufficient, the electric load 5 can access the power distribution system through the port 12 on the dc bus 6 to get electricity; when the individual distribution transformer 2 is overloaded, in addition to getting power from other distribution transformers 2, other direct-current power supplies connected to the direct-current bus 6 can also be used for providing electric energy for the overloaded distribution transformer 2, and the overload phenomenon can be relieved through electric energy compensation.
Compared with the existing radial distribution network, the flexible networking system in the power utilization enterprise of the multi-distribution transformer, provided by the invention, has the advantages that at least one first bidirectional converter is configured for each distribution transformer, the alternating current side port of each first bidirectional converter is electrically connected with the low-voltage bus corresponding to one distribution transformer, and the direct current side ports of the first bidirectional converters are interconnected through the direct current buses, so that a mesh connection network is formed among a plurality of distribution transformers in the system; each distribution transformer can be flexibly connected with each other, electric energy in the system can be transferred and distributed among the distribution transformers along a grid-shaped distribution network, functions of mutual power support, energy interaction, mutual voltage support and mutual emergency standby are achieved, enterprise distribution safety is guaranteed, and the utilization rate of electric power assets is improved.
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 (8)
1. A flexible networking system in an electric enterprise with multiple distribution transformers comprises a plurality of distribution transformers, wherein the low-voltage side of each distribution transformer is connected with a power supply bus to distribute power for an electric load through the power supply bus; the converter is characterized by also comprising a first bidirectional converter;
the alternating current side port of each first bidirectional converter is electrically connected with the power supply bus corresponding to one distribution transformer, and the direct current side ports of the first bidirectional converters are interconnected through the direct current buses; a mesh connection network capable of supplying power and transferring energy is formed among the distribution transformers through a plurality of first bidirectional converters and the direct current bus;
when any distribution transformer is overloaded, the first bidirectional converter and the direct current bus which are connected with the distribution transformer obtain electric energy from other distribution transformers to supply a power supply bus which is connected with the distribution transformer, so that electric energy transfer and compensation are realized;
and the alternating current side port of each first bidirectional converter is electrically connected with the power supply bus corresponding to one distribution transformer through an isolation transformer, and a protection switch is also arranged between the isolation transformer and the power supply bus.
2. The system of claim 1, wherein the first bi-directional converter is a bi-directional converter with controllable AC/DC side and four quadrant AC side operation.
3. The system according to claim 1, wherein a power bus corresponding to each distribution transformer is connected to a plurality of first bidirectional converters.
4. The system of claim 1, wherein at least one energy storage converter is further connected to the dc bus, and the energy storage converter is interconnected with each first bidirectional converter through the dc bus.
5. The system of claim 4, wherein the energy storage converter is a bidirectional converter with controllable DC/DC voltage, and the energy storage converter realizes the control and regulation of the DC bus voltage and the time-domain regulation of the power distribution network through planned charging and discharging.
6. The system of claim 1, further comprising at least one second bidirectional converter, wherein a first side port of the second bidirectional converter is connected to the dc bus, and a second side port of the second bidirectional converter is used as an external port for docking with the distributed new energy.
7. The system of claim 6, wherein an isolation transformer and a protection switch are further disposed between the second side port of the second bidirectional converter and the external port.
8. The system of claim 1, wherein a port for connecting a dc power supply or an electrical load is reserved on the dc bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010323811.0A CN111463786B (en) | 2020-04-22 | 2020-04-22 | Power consumption enterprise internal flexible networking system with multiple distribution transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010323811.0A CN111463786B (en) | 2020-04-22 | 2020-04-22 | Power consumption enterprise internal flexible networking system with multiple distribution transformers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111463786A CN111463786A (en) | 2020-07-28 |
| CN111463786B true CN111463786B (en) | 2022-05-13 |
Family
ID=71679591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010323811.0A Active CN111463786B (en) | 2020-04-22 | 2020-04-22 | Power consumption enterprise internal flexible networking system with multiple distribution transformers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111463786B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115360713B (en) * | 2022-09-01 | 2023-04-28 | 湖北春田电工技术有限公司 | Flexible switching method of factory interconnection power distribution system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720608A (en) * | 2016-04-27 | 2016-06-29 | 湖北文理学院 | Flexible power distribution station |
| CN105896623A (en) * | 2016-06-08 | 2016-08-24 | 国网辽宁省电力有限公司电力科学研究院 | AC/DC hybrid power distribution system based on multi-terminal flexible DC power transmission technology |
| CN208078661U (en) * | 2018-05-10 | 2018-11-09 | 国网江苏省电力有限公司徐州供电分公司 | A kind of low pressure flexibility supplying power allocation system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8097973B2 (en) * | 2009-03-03 | 2012-01-17 | Aboundi, Inc. | Power mains transformer data bridge |
-
2020
- 2020-04-22 CN CN202010323811.0A patent/CN111463786B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720608A (en) * | 2016-04-27 | 2016-06-29 | 湖北文理学院 | Flexible power distribution station |
| CN105896623A (en) * | 2016-06-08 | 2016-08-24 | 国网辽宁省电力有限公司电力科学研究院 | AC/DC hybrid power distribution system based on multi-terminal flexible DC power transmission technology |
| CN208078661U (en) * | 2018-05-10 | 2018-11-09 | 国网江苏省电力有限公司徐州供电分公司 | A kind of low pressure flexibility supplying power allocation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111463786A (en) | 2020-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200220355A1 (en) | Chained multi-port grid-connected interface apparatus and control method | |
| CN108923409B (en) | DC power supply system | |
| CN106532889A (en) | Direct-current power system having parallel battery modules and method | |
| CN108183545B (en) | Multi-energy micro-grid power supply system for data center | |
| Jia et al. | Architecture design for new AC-DC hybrid micro-grid | |
| CN107039965B (en) | Community distribution network power supply system | |
| CN111463787B (en) | Flexible networking system for power grids with different voltage levels in enterprise | |
| CN211089207U (en) | Parallel charging module and double-mixed type direct current screen system applying same | |
| CN109687463B (en) | AC/DC hybrid micro-grid structure integrated with distribution transformer rectifier | |
| Padhi et al. | Dc microgrids: architecture and challenges | |
| CN111463786B (en) | Power consumption enterprise internal flexible networking system with multiple distribution transformers | |
| CN110380506A (en) | A kind of distributed multiple-connected battery system for prefabricated cabin formula unit equipment | |
| CN202353297U (en) | Data center IT device power supply system and standby high voltage DC power supply | |
| CN211790953U (en) | Three-layer type power supply system for alternating current-direct current hybrid station suitable for multi-station fusion engineering | |
| CN212435428U (en) | Uninterruptible power supply | |
| CN216959346U (en) | Alternating current-direct current microgrid router system for comprehensive energy station | |
| CN111082421A (en) | AC/DC micro-grid system based on energy router and protection method thereof | |
| CN216268708U (en) | Vehicle-mounted power supply system and magnetic suspension train | |
| CN210468814U (en) | Charging and storing integrated device based on multiplexing bidirectional DCDC converter | |
| CN112701673A (en) | Power plant comprehensive direct current system based on storage battery pack switching | |
| Kou et al. | The Design Method of AC-DC Microgrid Based on Smart Energy Station | |
| CN217282363U (en) | Substation power transformation system based on new energy | |
| CN216162465U (en) | Power supply system for transformer substation based on 10kV energy router reconfiguration | |
| CN220254179U (en) | Power supply system of data center and data center | |
| CN212277685U (en) | Multi-port direct current power supply 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |