CN216672605U - Renewable energy railway energy routing system - Google Patents
Renewable energy railway energy routing system Download PDFInfo
- Publication number
- CN216672605U CN216672605U CN202220069331.0U CN202220069331U CN216672605U CN 216672605 U CN216672605 U CN 216672605U CN 202220069331 U CN202220069331 U CN 202220069331U CN 216672605 U CN216672605 U CN 216672605U
- Authority
- CN
- China
- Prior art keywords
- winding transformer
- renewable energy
- energy
- converter
- railway
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses a renewable energy railway energy routing system which comprises a plurality of renewable energy routing subsystems, a first multi-winding transformer and a second multi-winding transformer, wherein the renewable energy routing subsystems are connected with the first multi-winding transformer; two sides of the renewable energy source energy routing subsystems are respectively connected to the secondary side of the first multi-winding transformer and the secondary side of the second multi-winding transformer, and the two sides of the renewable energy source energy routing subsystems are respectively connected to the traction network through the first multi-winding transformer and the second multi-winding transformer. The utility model has fault-tolerant capability, and can ensure the normal operation of the system even if the system suffers external disturbance or local fault; the tolerance requirement on internal power electronic devices under a high-voltage large-capacity environment is relieved; the method is suitable for various voltage levels, and can improve the system utilization rate.
Description
Technical Field
The utility model belongs to the technical field of electrified railways, and particularly relates to a renewable energy railway energy routing system.
Background
Along with the rapid development of the electrified railways in China, the annual power consumption of the railways is as high as 900 hundred million kWh, which means that 360 hundred million kilograms of standard coal are consumed each year, and the discharge amount of carbon dioxide, sulfur dioxide and nitrogen oxide is huge; to achieve the "carbon peak," carbon neutral "vision, scholars both at home and abroad are actively advancing new power modes. Photovoltaic power generation is a focus of attention because of its advantages of cleanliness, no pollution, no noise, large scale, and the like.
The prior art proposes a novel power supply mode that integrates a photovoltaic power generation system and an energy storage system through the dc side of a back-to-back converter device. The system can effectively improve the electric energy quality of a traction power supply system such as idle work, negative sequence, harmonic wave and the like, simultaneously takes the photovoltaic electric energy into consideration, and recovers the regenerative braking energy. However, the current research mainly focuses on a centralized photovoltaic energy storage back-to-back converter system, which has a large system capacity and has severe requirements on the rated capacity, tolerance level and the like of power electronic devices in the system; and the system does not have local fault-tolerant capability, and if local elements in the external equipment are abnormal or have faults, the whole equipment needs to be switched out of the operating state. Therefore, the functions of the railway energy router cannot be fully exerted in the prior art, and the centralized photovoltaic assembly causes low utilization rate of the photovoltaic system.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a renewable energy railway energy routing system which can improve the problem of electric energy quality of a traction power supply system; the group-string structure has fault-tolerant capability, and can ensure the normal operation of the system even if the system suffers external disturbance or local fault; the tolerance requirement on internal power electronic devices under a high-voltage large-capacity environment is relieved; the method is suitable for various voltage levels, and can improve the system utilization rate.
In order to realize the purpose, the utility model adopts the technical scheme that: a renewable energy railway energy routing system comprising: a plurality of renewable energy routing subsystems and a multi-winding transformer; the alternating current sides of the renewable energy routing subsystems are connected to the secondary sides of the multi-winding transformers and connected to the traction network through the multi-winding transformers.
Further, the renewable energy routing subsystem comprises a back-to-back converter and a renewable energy power supply system; the renewable energy power supply system is connected to the direct current side of the back-to-back converter; two alternating current sides of the back-to-back converter are respectively connected to the secondary side of the first multi-winding transformer and the secondary side of the second multi-winding transformer and are respectively connected to the traction network through the first multi-winding transformer and the second multi-winding transformer.
Further, the first multi-winding transformer is an alpha-phase multi-winding transformer, and the second multi-winding transformer is a beta-phase multi-winding transformer; two sides of the renewable energy source energy routing subsystems are respectively connected to the secondary side of the alpha-phase multi-winding transformer and the secondary side of the beta-phase multi-winding transformer, and the two sides of the renewable energy source energy routing subsystems are respectively connected with an alpha power supply arm, a beta power supply arm and a steel rail in the traction network through the alpha-phase multi-winding transformer and the beta-phase multi-winding transformer.
Furthermore, the renewable energy routing subsystem further comprises a first control switch and a second control switch, and two alternating current sides of the back-to-back converter are respectively connected with the first control switch and the second control switch; the first control switch is connected to the secondary side of the first multi-winding transformer, and the second control switch is connected to the secondary side of the second multi-winding transformer. The fault-tolerant capability of the system can be effectively improved, and when a local fault occurs, the control switches on the two sides can be disconnected, so that the fault is removed, and the continuous operation of the system can still be ensured. The control switch can adopt various controllable switches such as an isolation protection switch, a circuit breaker and the like.
Further, the back-to-back converter system comprises a first four-quadrant converter, a second four-quadrant converter and a common direct current capacitor; the direct current sides of the first four-quadrant converter and the second four-quadrant converter are connected to a common direct current capacitor in parallel.
Further, the renewable energy power supply system comprises a photovoltaic system, and the photovoltaic system is connected to the direct current side of the back-to-back converter.
Furthermore, the renewable energy power supply system further comprises an energy storage system, and the energy storage system and the photovoltaic system are connected to the direct current side of the back-to-back converter in parallel.
Further, the energy storage system comprises an energy storage device and a bidirectional energy converter, or only comprises the energy storage device.
Further, the photovoltaic system includes a photovoltaic array and a DC/DC converter.
The system further comprises a central control system, wherein the central control system is in information interaction with the traction network and the plurality of renewable energy routing subsystems through a communication channel.
The beneficial effects of the technical scheme are as follows:
the system provided by the utility model adopts a modularized string structure, so that the fault tolerance of the system can be effectively improved, and when a local fault occurs, a single subsystem can be disconnected to remove the fault, and the continuous operation of the system can still be ensured.
The multi-module group serial structure provided by the utility model is beneficial to relieving the tolerance requirement on internal power electronic devices in a high-voltage large-capacity environment, and can reduce the requirement on the performance of the system power electronic devices in the high-voltage large-capacity environment.
The highly-modularized device can calculate the number of modules which are put into use according to the requirements of different scene capacities, is further suitable for systems with various capacity requirements, and improves the utilization rate of the systems.
The system provided by the utility model provides energy circulation channels for the power supply arms on two sides, and simultaneously provides an access channel of a renewable energy power supply system, so that the electric energy of a traction power supply system is improved; meanwhile, the electric quantity generated by the direct-current micro-grid is absorbed, and the energy generated by the regenerative braking of the train is effectively recovered.
When the photovoltaic system is adopted, compared with a centralized structure, the series structure is more beneficial to avoiding the influence of shadow on the photovoltaic, and the utilization rate of the photovoltaic system can be effectively improved.
Drawings
FIG. 1 is a schematic diagram of a renewable energy railway energy routing system according to the present invention;
FIG. 2 is a schematic structural diagram of a renewable energy routing subsystem according to an embodiment of the present invention;
wherein, 1 is a traction network, 11 is an alpha power supply arm, 12 is a beta power supply arm, 13 is a steel rail, 21 is a renewable energy source energy routing subsystem, 22 is a first multi-winding transformer, 23 is a second multi-winding transformer, and 24 is a central control system; 211 is a back-to-back converter, 212 is an energy storage system, 213 is a photovoltaic system, 214 is a first control switch, 215 is a second control switch, 2111 is a first four-quadrant converter, 2112 is a second four-quadrant converter, 2113 is a common direct current capacitor, 2131 is a photovoltaic array, 2132 is a DC/DC converter.
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 the present embodiment, referring to fig. 1, the traction network 1 includes an α power supply arm 11, a β power supply arm 12, a steel rail 13, and a traction load 14; the alpha power supply arm 11 and the beta power supply arm 12 respectively form a loop with the steel rail 13; the traction load 14 is connected between the α/β phase power supply arm 11/12 and the rail 13.
A renewable energy railway energy routing system comprising: a plurality of renewable energy routing subsystems 21 and multi-winding transformers; the alternating current sides of the renewable energy routing subsystems 21 are connected to the secondary side of the multi-winding transformer and connected to the traction network 1 through the multi-winding transformer.
As an optimization solution of the above embodiment, as shown in fig. 2, the renewable energy routing subsystem 21 includes a back-to-back converter 211 and a renewable energy power supply system; the renewable energy power supply system is connected to the direct current side of the back-to-back converter 211; two alternating current sides of the back-to-back converter 211 are respectively connected to the secondary side of the first multi-winding transformer 22 and the secondary side of the second multi-winding transformer 23, and are respectively connected to the traction network 1 through the first multi-winding transformer 22 and the second multi-winding transformer 23.
Preferably, the first multi-winding transformer 22 may adopt an α -phase multi-winding transformer, and the second multi-winding transformer 23 may adopt a β -phase multi-winding transformer; two sides of the renewable energy routing subsystems 21 are respectively connected to the secondary side of the alpha-phase multi-winding transformer and the secondary side of the beta-phase multi-winding transformer, and the secondary sides are respectively connected with the alpha power supply arm 11, the beta power supply arm 12 and the steel rail 13 in the traction network 1 through the alpha-phase multi-winding transformer and the beta-phase multi-winding transformer.
Preferably, the back-to-back converter system 211 may adopt a back-to-back converter of a four-quadrant converter, and includes a first four-quadrant converter 2111, a second four-quadrant converter 2112 and a common dc capacitor 2113; the dc sides of the first and second four-quadrant converters 2111 and 2112 are connected in parallel to a common dc capacitor 2113.
Preferably, the renewable energy power supply system comprises a photovoltaic system 213, and the photovoltaic system 213 is connected to the direct current side of the back-to-back converter 211; the energy storage system 212 is further included, and the energy storage system 212 and the photovoltaic system 213 are connected to the direct current side of the back-to-back converter 211 in parallel.
The photovoltaic system 213 includes a photovoltaic array 2131 and a DC/DC converter 2132.
The energy storage system 212 may include an energy storage device and a bidirectional energy converter, or may include only an energy storage device. The medium of the energy storage device comprises one or more mixed energy storage media of storage battery energy storage, superconducting energy storage, super capacitor energy storage, flywheel energy storage, flow battery and the like.
As an optimization solution of the above embodiment, as shown in fig. 2, the renewable energy routing subsystem 21 further includes a first control switch 214 and a second control switch 215, and two ac sides of the back-to-back converter 211 are respectively connected to the first control switch 214 and the second control switch 215; a first control switch 214 is connected to the secondary side of the first multi-winding transformer 22 and a second control switch 215 is connected to the secondary side of the second multi-winding transformer 23.
As an optimization solution of the above embodiment, as shown in fig. 1, the renewable energy railway energy routing system further includes a central control system 24, where the central control system 24 performs information interaction with the traction network 1 and the plurality of renewable energy routing subsystems 21 through a communication channel.
In specific implementation, the central control system 24 may detect, in real time, voltage/current data of the two power supply arms, voltage/current/temperature data of the photovoltaic system, and real-time state of charge/voltage/current/temperature data of the energy storage system; the central control system 24 calculates the traction load power and the photovoltaic output power, and selects an operation mode according to the calculation result; the central control system 24 is n sub-modules (RER) according to different modes1,…,RERn) And distributing power and/or current to realize system coordination control.
For a better understanding of the present invention, the following is a complete description of the working principle of the present invention:
active power transfer is realized by controlling the single-phase back-to-back converter, and reactive power and harmonic compensation is realized by controlling the single-phase back-to-back converter to dynamically output corresponding reactive power and harmonic current. The system adopts a modularized serial structure, can effectively improve the fault-tolerant capability of the system, and can still ensure the continuous operation of the system by disconnecting a single subsystem and removing a fault when a local fault occurs. The multi-module group serial structure dispersedly processes electric energy, is beneficial to relieving the tolerance requirement on internal power electronic devices in a high-voltage large-capacity environment, and can reduce the requirement on the performance of the system power electronic devices in the high-voltage large-capacity environment. The highly modular device is matched with the string type structure, the number of modules put into use can be calculated according to the requirements of different scene capacities, and therefore the highly modular device is suitable for systems with various capacity requirements, and the utilization rate of the systems is improved.
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 (10)
1. A renewable energy railway energy routing system, comprising: a plurality of renewable energy routing subsystems (21) and multi-winding transformers; the alternating current sides of the renewable energy routing subsystems (21) are connected to the secondary side of the multi-winding transformer and connected to the traction network (1) through the multi-winding transformer.
2. A renewable energy railway energy routing system according to claim 1, wherein the renewable energy routing subsystem (21) comprises a back-to-back converter (211) and a renewable energy power supply system; the renewable energy power supply system is connected to the direct current side of the back-to-back converter (211); two alternating current sides of the back-to-back converter (211) are respectively connected to a secondary side of the first multi-winding transformer (22) and a secondary side of the second multi-winding transformer (23), and are respectively connected to the traction network (1) through the first multi-winding transformer (22) and the second multi-winding transformer (23).
3. A renewable energy railway energy routing system according to claim 2, wherein the first multi-winding transformer (22) is an alpha-phase multi-winding transformer and the second multi-winding transformer (23) is a beta-phase multi-winding transformer; two sides of the renewable energy source energy routing subsystems (21) are respectively connected to the secondary side of the alpha-phase multi-winding transformer and the secondary side of the beta-phase multi-winding transformer, and the two sides of the renewable energy source energy routing subsystems are respectively connected with the alpha power supply arm (11), the beta power supply arm (12) and the steel rail (13) in the traction network (1) through the alpha-phase multi-winding transformer and the beta-phase multi-winding transformer.
4. A renewable energy railway energy routing system according to claim 2, wherein the renewable energy routing subsystem (21) further comprises a first control switch (214) and a second control switch (215), and both ac sides of the back-to-back converter (211) are connected to the first control switch (214) and the second control switch (215), respectively; a first control switch (214) is connected to the secondary side of the first multi-winding transformer (22) and a second control switch (215) is connected to the secondary side of the second multi-winding transformer (23).
5. A renewable energy railway energy routing system according to claim 2, wherein the back-to-back converter (211) comprises a first four-quadrant converter (2111), a second four-quadrant converter (2112) and a common dc capacitor (2113); the direct current sides of the first four-quadrant converter (2111) and the second four-quadrant converter (2112) are connected to a common direct current capacitor (2113) in parallel.
6. A renewable energy railway energy routing system according to any of claims 1 to 5, wherein the renewable energy power supply system comprises a photovoltaic system (213), the photovoltaic system (213) being connected to the DC side of the back-to-back converter (211).
7. A renewable energy railway energy routing system according to claim 6, wherein the renewable energy power supply system further comprises an energy storage system (212), the energy storage system (212) and a photovoltaic system (213) being connected in parallel to the DC side of the back-to-back converter (211).
8. A renewable energy railway energy routing system according to claim 7, wherein the energy storage system (212) comprises an energy storage device and a bidirectional energy converter, or only an energy storage device.
9. A renewable energy railway energy routing system according to claim 7, wherein the photovoltaic system (213) comprises a photovoltaic array (2131) and a DC/DC converter (2132).
10. A renewable energy railway energy routing system according to claim 1, further comprising a central control system (24), said central control system (24) interacting with the traction network (1) and the plurality of renewable energy routing subsystems (21) via a communication channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220069331.0U CN216672605U (en) | 2022-01-12 | 2022-01-12 | Renewable energy railway energy routing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220069331.0U CN216672605U (en) | 2022-01-12 | 2022-01-12 | Renewable energy railway energy routing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216672605U true CN216672605U (en) | 2022-06-03 |
Family
ID=81763091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220069331.0U Active CN216672605U (en) | 2022-01-12 | 2022-01-12 | Renewable energy railway energy routing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216672605U (en) |
-
2022
- 2022-01-12 CN CN202220069331.0U patent/CN216672605U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107612051B (en) | AC/DC hybrid system based on dual-redundancy power electronic transformer | |
| CN100483917C (en) | Renewable energy feed-back parallel network circuit and its control device | |
| CN102810870A (en) | Electromagnetic hybrid device and method for synergetic compensation of high-speed railway multi-station electric energy quality | |
| 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 | |
| CN115811128A (en) | Medium-low voltage flexible interconnection coordination control system, method, equipment and medium | |
| CN112104306B (en) | Mixed type flexible loop closing device and optical storage sharing interface control method | |
| CN216672605U (en) | Renewable energy railway energy routing system | |
| CN2917086Y (en) | Renewable energy feedback netting circuit and its control device | |
| CN216959346U (en) | Alternating current-direct current microgrid router system for comprehensive energy station | |
| CN114336701B (en) | Medium-voltage direct-hanging energy storage system topological structure suitable for high power and large capacity | |
| CN216959333U (en) | Railway energy routing system powered by renewable energy micro-grid | |
| CN215419596U (en) | Electrified railway multifunctional energy storage system with fault-tolerant capability | |
| CN216959329U (en) | Railway direct current source double-cascade access system | |
| CN113193581A (en) | Energy storage system grid-connected device | |
| CN114362162B (en) | Railway energy route regulation and control method based on photovoltaic energy storage system | |
| CN216672604U (en) | Cascade parallel railway energy routing system | |
| Liu et al. | Coordination Control Strategy of Co-Phase Traction Power Supply System Integrated with Hybrid Energy Storage Systems | |
| Ruixiong et al. | Review of typical technical schemes for medium and low voltage DC distribution | |
| CN115000995B (en) | Traction power supply active power communication system and control method thereof | |
| CN221282852U (en) | Photovoltaic district direct current gathers network system | |
| CN215120144U (en) | Multifunctional multiplexing power type micro energy storage device | |
| Zheng et al. | Research on AC/DC hybrid power supply system in industrial park | |
| CN215419612U (en) | Multi-scene self-consistent energy system for electrified railway | |
| Chen et al. | Discussion on reactive power coordination control technology of VSC/LCC HVDC parallel hybrid system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |