CN215419596U - Electrified railway multifunctional energy storage system with fault-tolerant capability - Google Patents
Electrified railway multifunctional energy storage system with fault-tolerant capability Download PDFInfo
- Publication number
- CN215419596U CN215419596U CN202121616161.5U CN202121616161U CN215419596U CN 215419596 U CN215419596 U CN 215419596U CN 202121616161 U CN202121616161 U CN 202121616161U CN 215419596 U CN215419596 U CN 215419596U
- Authority
- CN
- China
- Prior art keywords
- phase
- energy storage
- converter
- down transformer
- winding step
- 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
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model discloses a multifunctional energy storage system with fault-tolerant capability for an electrified railway, which comprises an alpha-phase single-phase multi-winding step-down transformer, a beta-phase single-phase multi-winding step-down transformer and a plurality of back-to-back energy storage subsystems, wherein two ends of the plurality of back-to-back energy storage subsystems are respectively connected to secondary sides of the alpha-phase single-phase multi-winding step-down transformer and the beta-phase single-phase multi-winding step-down transformer in parallel, and primary sides of the alpha-phase single-phase multi-winding step-down transformer and the beta-phase single-phase multi-winding step-down transformer are respectively bridged between an alpha-phase power supply arm and a steel rail of a traction substation and between the beta-phase power supply arm and the steel rail. The utility model adopts a modularized parallel structure to form a distributed redundant system with fault-tolerant capability, can ensure the continuous execution of multiple functions of the system even if the system suffers from external disturbance or local fault, is beneficial to relieving the strict requirement on the performance of electronic and electric power devices in the system under a high-voltage and high-capacity environment, and has higher structural adaptability.
Description
Technical Field
The utility model belongs to the technical field of electrified railways, and particularly relates to a multifunctional energy storage system with fault-tolerant capability for an electrified railway.
Background
With the rapid development of electrified railways in China, how to effectively recover a large amount of regenerated electric energy generated in the braking process of a locomotive is a great challenge to promote low-carbon transformation of railway energy. According to statistics, the Jinghusu railway can generate the regenerative braking energy of up to 120GWH each year, and the Shuisuo railway braking energy can reach 20 percent of the total energy consumption. If the energy is not recycled, the energy is greatly wasted, and the quality of the electric energy of the traction power supply system, especially negative sequence, reactive power, harmonic wave, network voltage fluctuation of the traction network and the like, can be further deteriorated. Not only can the upstream power grid be polluted to cause fine money of a railway system, but also the safe and stable operation of the train can be threatened.
The existing recycling technology mainly comprises a resistance energy consumption type, a power grid energy feedback type, an operation diagram optimization type and an energy storage type, wherein the energy storage recycling technology is a current research hotspot due to the fact that practical difficulties of extra energy consumption, operation safety, multi-vehicle scheduling and the like are avoided. However, the particularity of a traction power supply system, such as asymmetry of a topological structure, a series of power quality problems and the like, is mostly ignored in the existing energy storage application, and the factors are very important for guaranteeing the traction power supply quality, the energy saving efficiency and the reliable operation of a train. In addition, due to the particularity of the application environment of the railway system, the abnormal state and the failure occurrence rate of local elements in the external equipment are higher than those in the conventional application environment. Therefore, there is a need to develop a new energy storage system with multi-functional fault tolerance that is adaptable to railway systems.
In the prior art, although a scheme of combining a railway electric energy quality compensation device with an energy storage system is provided, most existing systems do not have local fault tolerance capability, and meanwhile, the requirements on rated capacity/tolerance level and the like of electronic power devices in the systems are severe under a high-capacity environment (the single machine requirement can reach more than 10 MW).
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a multifunctional energy storage system of an electrified railway with fault tolerance, which adopts a modular parallel structure to form a distributed redundant system with fault tolerance, can ensure the continuous execution of multiple functions of the system even if the system suffers from external disturbance or local fault, is beneficial to relieving the strict requirement on the performance of electronic and electric devices in the system under a high-voltage and high-capacity environment, and has higher structural adaptability.
In order to realize the purpose, the utility model adopts the technical scheme that: the utility model provides a multi-functional energy storage system of electrified railway with fault-tolerant ability, including alpha looks single-phase multi-winding step-down transformer, beta looks single-phase multi-winding step-down transformer and a plurality of back-to-back energy storage subsystems, the both ends of a plurality of back-to-back energy storage subsystems are parallelly connected in the secondary of alpha looks single-phase multi-winding step-down transformer and beta looks single-phase multi-winding step-down transformer respectively, and the primary side of alpha looks single-phase multi-winding step-down transformer and beta looks single-phase multi-winding step-down transformer bridges respectively between alpha looks power supply arm and the rail and between beta looks power supply arm and the rail of traction substation.
Further, the back-to-back energy storage subsystem comprises a back-to-back converter unit, an energy storage unit, an alpha abnormal state switching unit and a beta abnormal state switching unit; alternating current sides at two ends of the back-to-back converter unit are respectively connected with the alpha-phase abnormal state switching unit and the beta-phase abnormal state switching unit, and a middle direct current side of the back-to-back converter unit is connected with the energy storage unit.
Further, the back-to-back converter unit comprises an alpha-phase single-phase four-quadrant converter, a beta-phase single-phase four-quadrant converter and a direct-current supporting capacitor, the direct-current sides of the alpha-phase single-phase four-quadrant converter and the beta-phase single-phase four-quadrant converter are connected to two ends of the direct-current supporting capacitor, and the alternating-current sides of the alpha-phase single-phase four-quadrant converter and the beta-phase single-phase four-quadrant converter are respectively connected with the alpha-phase abnormal state switching unit and the beta-phase abnormal state switching unit.
Furthermore, the energy storage unit comprises a bidirectional DC/DC converter and an energy storage device, one end of the bidirectional DC/DC converter is connected with the energy storage device, and the other end of the bidirectional DC/DC converter is connected to two ends of the direct current support capacitor in parallel.
The system further comprises a control unit, and the control unit is in communication connection with each back-to-back energy storage subsystem and the traction power supply system.
The beneficial effects of the technical scheme are as follows:
the utility model adopts a modularized parallel structure to form a distributed redundant system with fault-tolerant capability, can ensure the continuous execution of multiple functions of the system even if the system suffers from external disturbance or local fault, is beneficial to relieving the strict requirement on the performance of electronic and electric power devices in the system under a high-voltage and high-capacity environment, and has higher structural adaptability. The utility model can effectively recycle the regenerative braking energy of the train and improve the multiple electric energy quality problems of the traction power supply system, including negative sequence/reactive power/harmonic wave/traction network voltage fluctuation and the like, thereby being beneficial to improving the traction power supply quality and bringing additional economic benefit.
Drawings
FIG. 1 is a schematic diagram of a multifunctional energy storage system with fault tolerance for an electrified railway according to the present invention;
FIG. 2 is a schematic diagram of a back-to-back energy storage subsystem according to an embodiment of the present invention;
the system comprises a 1-traction power supply system, an 11-three-phase public power grid, a 12-traction substation, a 13-alpha phase power supply arm, a 14-beta phase power supply arm, a 15-steel rail, a 2-multifunctional back-to-back energy storage system, a 21-alpha phase single-phase multi-winding step-down transformer, a 22-beta phase single-phase multi-winding step-down transformer, a 23-back energy storage subsystem, a 231-back converter unit, a 232-energy storage unit, a 2311-alpha phase single-phase four-quadrant converter, a 2312-beta phase single-phase four-quadrant converter, a 2313-direct current support capacitor, a 2321-bidirectional DC/DC converter, a 2322-energy storage device, a 233-alpha phase abnormal state switching unit, a 234-beta phase abnormal state switching unit and a 24-control unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described below with reference to the accompanying drawings.
In this embodiment, referring to fig. 1, a multifunctional energy storage system of an electrified railway with fault tolerance capability is characterized by comprising an α -phase single-phase multi-winding step-down transformer 21, a β -phase single-phase multi-winding step-down transformer 22, and a plurality of back-to-back energy storage subsystems, wherein two ends of the plurality of back-to-back energy storage subsystems are respectively connected to secondary sides of the α -phase single-phase multi-winding step-down transformer 21 and the β -phase single-phase multi-winding step-down transformer 22 in parallel, and primary sides of the α -phase single-phase multi-winding step-down transformer 21 and the β -phase single-phase multi-winding step-down transformer 22 are respectively bridged between an α -phase power supply arm 13 and a steel rail 15 of a traction substation 12 and between a β -phase power supply arm 14 and a steel rail 15.
As an optimization scheme of the above embodiment, as shown in fig. 2, the back-to-back energy storage subsystem 23 includes a back-to-back converter unit 231, an energy storage unit 232, an α -phase abnormal state switching unit 233, and a β -phase abnormal state switching unit 234; the ac sides of the two ends of the back-to-back converter unit 231 are respectively connected to the α -phase abnormal state switching unit 233 and the β -phase abnormal state switching unit 234, and the dc side in the middle of the back-to-back converter unit 231 is connected to the energy storage unit 232.
The back-to-back converter unit 231 comprises an alpha-phase single-phase four-quadrant converter 2311, a beta-phase single-phase four-quadrant converter 2312 and a direct-current supporting capacitor 2313, direct-current sides of the alpha-phase single-phase four-quadrant converter 2311 and the beta-phase single-phase four-quadrant converter 2312 are connected to two ends of the direct-current supporting capacitor 2313, and alternating-current sides of the alpha-phase single-phase four-quadrant converter 2311 and the beta-phase single-phase four-quadrant converter 2312 are connected with an alpha-abnormal-state switching unit 233 and a beta-abnormal-state switching unit 234 respectively.
The energy storage unit 232 includes a bidirectional DC/DC converter 2321 and an energy storage device 2322, one end of the bidirectional DC/DC converter 2321 is connected to the energy storage device 2322, and the other end of the bidirectional DC/DC converter 2321 is connected in parallel to two ends of the direct current support capacitor 2313.
As an optimized solution of the above embodiment, the system further includes a control unit 24, and the control unit 24 is in communication connection with each back-to-back energy storage subsystem and the traction power supply system 1.
Each parallel back-to-back energy storage subsystem has the same configuration structure; meanwhile, the energy storage unit is used for storing and utilizing regenerative braking energy, the back-to-back converter units can realize multidirectional transfer of energy and comprehensive compensation of electric energy quality at a traction side, and the abnormal state switching units at two sides of each subsystem can be matched with the control unit to switch the subsystem in the abnormal state, so that quick fault response of a hardware system is realized.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. The multifunctional energy storage system with fault tolerance capability for the electrified railway is characterized by comprising an alpha-phase single-phase multi-winding step-down transformer (21), a beta-phase single-phase multi-winding step-down transformer (22) and a plurality of back-to-back energy storage subsystems, wherein two ends of the plurality of back-to-back energy storage subsystems are respectively connected to secondary sides of the alpha-phase single-phase multi-winding step-down transformer (21) and the beta-phase single-phase multi-winding step-down transformer (22) in parallel, and primary sides of the alpha-phase single-phase multi-winding step-down transformer (21) and the beta-phase single-phase multi-winding step-down transformer (22) are respectively bridged between an alpha-phase power supply arm (13) and a steel rail (15) of a traction substation (12) and between a beta-phase power supply arm (14) and the steel rail (15).
2. The multifunctional energy storage system with fault tolerance capability for the electrified railway according to claim 1, wherein the back-to-back energy storage subsystem (23) comprises a back-to-back converter unit (231), an energy storage unit (232), an alpha-phase abnormal-state switching unit (233) and a beta-phase abnormal-state switching unit (234); alternating current sides at two ends of the back-to-back converter unit (231) are respectively connected with the alpha abnormal state switching unit (233) and the beta abnormal state switching unit (234), and a middle direct current side of the back-to-back converter unit (231) is connected with the energy storage unit (232).
3. The multifunctional energy storage system with fault tolerance capability for the electrified railways according to claim 2, characterized in that the back-to-back converter units (231) comprise an α -phase single-phase four-quadrant converter (2311), a β -phase single-phase four-quadrant converter (2312) and a dc support capacitor (2313), the dc sides of the α -phase single-phase four-quadrant converter (2311) and the β -phase single-phase four-quadrant converter (2312) are connected to two ends of the dc support capacitor (2313), and the ac sides of the α -phase single-phase four-quadrant converter (2311) and the β -phase single-phase four-quadrant converter (2312) are respectively connected to the α -phase abnormal-state switching unit (233) and the β -abnormal-state switching unit (234).
4. The multifunctional energy storage system with fault tolerance capability for the electrified railway according to claim 3, wherein the energy storage unit (232) comprises a bidirectional DC/DC converter (2321) and an energy storage device (2322), one end of the bidirectional DC/DC converter (2321) is connected with the energy storage device (2322), and the other end of the bidirectional DC/DC converter (2321) is connected to two ends of the direct current support capacitor (2313) in parallel.
5. The multifunctional energy storage system with fault tolerance for electric railways according to any of claims 1 to 4, characterized in that it further comprises a control unit (24), said control unit (24) being communicatively connected to each back-to-back energy storage subsystem and the traction power supply system (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121616161.5U CN215419596U (en) | 2021-07-16 | 2021-07-16 | Electrified railway multifunctional energy storage system with fault-tolerant capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121616161.5U CN215419596U (en) | 2021-07-16 | 2021-07-16 | Electrified railway multifunctional energy storage system with fault-tolerant capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215419596U true CN215419596U (en) | 2022-01-04 |
Family
ID=79649859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121616161.5U Active CN215419596U (en) | 2021-07-16 | 2021-07-16 | Electrified railway multifunctional energy storage system with fault-tolerant capability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215419596U (en) |
-
2021
- 2021-07-16 CN CN202121616161.5U patent/CN215419596U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107612051B (en) | AC/DC hybrid system based on dual-redundancy power electronic transformer | |
| CN102810870B (en) | Electromagnetic hybrid device and method for synergetic compensation of high-speed railway multi-station electric energy quality | |
| CN105896583B (en) | A kind of peak load shifting and power quality harnessed synthetically system and its working method | |
| CN104934972A (en) | Active tide control power grid and control method of power exchange power node and medium-voltage distribution network | |
| CN213585162U (en) | AC/DC power supply structure of data center | |
| CN109428330A (en) | Electric railway auxiliary power supply system and control method with power circulation function | |
| CN106253317A (en) | A kind of peak load shifting and power quality harnessed synthetically system and method for work | |
| Zhao et al. | Summary and prospect of technology development of MVDC and LVDC distribution technology | |
| CN110619791A (en) | High-speed rail comprehensive energy utilization system experiment platform and experiment method thereof | |
| CN111478616A (en) | Subway traction power supply system and bidirectional converter device | |
| CN103560523A (en) | Photovoltaic generator set low-voltage ride-through supporting system based on DVR | |
| CN113708377A (en) | High-voltage asynchronous flexible interconnection device sharing direct-current bus | |
| CN215419596U (en) | Electrified railway multifunctional energy storage system with fault-tolerant capability | |
| CN218648579U (en) | Track traffic power supply system adopting bidirectional converter | |
| CN104917199A (en) | AC DC micro grid connection flexible serial parallel multifunctional energy controller | |
| CN205105110U (en) | Converter owner circuit topology structure of many power inputs | |
| CN216672605U (en) | Renewable energy railway energy routing system | |
| CN111907356B (en) | Tramcar line power supply system | |
| CN210667412U (en) | High-speed rail comprehensive energy utilization system experiment platform | |
| CN103414242A (en) | Electrified railway in-phase power supplying method and standby machine structure | |
| CN216959329U (en) | Railway direct current source double-cascade access system | |
| CN113783196A (en) | Power supply system of intelligent energy station | |
| CN216959333U (en) | Railway energy routing system powered by renewable energy micro-grid | |
| CN105914793A (en) | Isolation-type dual regenerative braking energy feedback inverter open-phase and derating control method | |
| CN202059321U (en) | Power unit of high pressure frequency converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |