CN112039085A - Rail transit power supply system - Google Patents
Rail transit power supply system Download PDFInfo
- Publication number
- CN112039085A CN112039085A CN202010830141.1A CN202010830141A CN112039085A CN 112039085 A CN112039085 A CN 112039085A CN 202010830141 A CN202010830141 A CN 202010830141A CN 112039085 A CN112039085 A CN 112039085A
- Authority
- CN
- China
- Prior art keywords
- power supply
- power
- bus
- transformer
- load
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L9/00—Electric propulsion with power supply external to the vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative 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
- H02J3/12—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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The invention provides a rail transit power supply system, which comprises: the power supply system comprises an external power supply, a power supply line and a plurality of load power supply lines for supplying power to a traction power supply load and a power lighting power supply load; the external power supply is connected with the input end of the power supply circuit, and the input end of the load power supply circuit is connected with the output end of the power supply circuit; each load power supply line comprises a power transformer, a traction transformer and a contact network; the primary side of the power transformer and the primary side of the traction transformer are both connected with the output end of a power supply line, the secondary side of the power transformer is connected with a power lighting power supply load, and the secondary side of the traction transformer is connected with a contact network which is used for supplying power to the traction power supply load; the contact network is provided with a plurality of phase separation areas, and each phase separation area is connected with different interphase voltages of the secondary side of the traction transformer; the problems that the ring network cable is low in utilization rate and a traction power supply system is unbalanced in three phases are solved.
Description
Technical Field
The invention belongs to the technical field of rail transit power supply, and particularly relates to a rail transit power supply system.
Background
When the highest running speed of the urban rail transit is more than 140km/h, an alternating current 25kV traction power supply system is mostly adopted, and a conventional 35kV medium-voltage network is still used for a power lighting power supply system. In the prior art, a traction power supply system and a power illumination power supply system share a 110kV power supply, no association coupling exists between the traction power supply system and the power illumination power supply system below 110kV, the traction power supply system and the power illumination power supply system are completely independent, and only the traction power supply system and the power illumination power supply system share the 110kV power supply. The power illumination power supply system adopts 35kV looped network cables to form a medium-voltage network, and three-phase cables are laid along the power illumination power supply system, but the power illumination load is small, and the utilization rate of the looped network cables is low; the traction power supply system adopts a 25kV traction power supply system, the traction load belongs to a single-phase load, and from a three-phase 110kV power supply to a single-phase 25kV power supply, three phases are unbalanced, so that the problem of electric energy quality mainly based on a negative sequence is caused.
Disclosure of Invention
In order to overcome the technical defects, the invention provides a rail transit power supply system, and aims to solve the problems that the ring network cable is low in utilization rate and a traction power supply system is unbalanced in three phases.
In order to solve the problems, the invention is realized according to the following technical scheme:
a rail transit power supply system comprising: the power supply system comprises an external power supply, a power supply line and a plurality of load power supply lines for supplying power to a traction power supply load and a power lighting power supply load; the external power supply is connected with the input end of the power supply circuit, and the input end of the load power supply circuit is connected with the output end of the power supply circuit; each load power supply line comprises a power transformer, a traction transformer and a contact network; the primary side of the power transformer and the primary side of the traction transformer are both connected with the output end of the power supply line, the secondary side of the power transformer is connected with the power lighting power supply load, the secondary side of the traction transformer is connected with the overhead contact system, and the overhead contact system is used for supplying power to the traction power supply load; the contact net is provided with a plurality of phase separation areas, and each phase separation area is connected with different phase-to-phase voltages of the secondary side of the traction transformer.
Further, the power supply line comprises a main transformer, a first bus and a second bus; the primary side of the main transformer is connected with the external power supply, the secondary side of the main transformer is connected with the first bus, the first bus is connected with the second bus, and the second bus is connected with the input end of the load power supply circuit.
Further, the first bus is also connected with an active SVG reactive power compensation device.
Further, the second bus is in a single bus sectional wiring form.
Further, the number of the external power supply and the power supply line is at least 2.
Further, different bus-sections of the second bus-bar each connect at least 2 of the first bus-bars.
Further, the main transformer is connected in a star or star triangle manner.
Further, the voltage of the external power supply is 110 kV.
Further, the voltage class of the first bus and the second bus is 35 kV.
Further, the contact net comprises an ascending contact net and a descending contact net.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a rail transit power supply system, wherein a load power supply line can simultaneously supply power for a traction power supply load and a power lighting power supply load, so that the power network in the urban rail transit at present is effectively utilized, and the utilization rate of equipment is improved; the phase separation area arranged on the contact net is connected with different two phases of the secondary side of the traction transformer, so that the problem of unbalanced three phases can be effectively solved.
Drawings
Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic structural diagram of a rail transit power supply system according to an embodiment.
Description of the labeling: 1. an external power supply; 2. a power supply line; 21. a main transformer; 22. a first bus bar; 23. a second bus bar; 3. a load power supply line; 31. a power transformer; 32. a traction transformer; 4. a catenary; 41. an ascending contact network; 42. a downlink contact network; 5. phase separation area; 6. active SVG reactive power compensator.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The invention discloses a rail transit power supply system, as shown in figure 1, comprising: the power supply system comprises an external power supply 1, a power supply line 2 and a plurality of load power supply lines 3 for supplying power to traction power supply loads and power lighting power supply loads; the external power supply 1 is connected with the input end of the power supply circuit 2, and the input end of the load power supply circuit 3 is connected with the output end of the power supply circuit 2; each load power supply line 3 comprises a power transformer 31, a traction transformer 32 and a contact network 4; the primary side of the power transformer 31 and the primary side of the traction transformer 32 are both connected with the output end of the power supply line 2, the secondary side of the power transformer 31 is connected with a power lighting power supply load, the secondary side of the traction transformer 32 is connected with a contact network 4, and the contact network 4 is used for supplying power for the traction power supply load; the contact network 4 is provided with a plurality of phase sections 5, and adjacent phase sections 5 are connected with different two phases of the secondary side of the traction transformer 32.
In the above-described embodiment, the power supply line 2 includes the main transformer 21, the first bus bar 22, and the second bus bar 23; the primary side of the main transformer 21 is connected with the external power supply 1, the secondary side of the main transformer 21 is connected with the first bus 22, the first bus 22 is connected with the second bus 23, and the second bus 23 is connected with the input end of the load power supply line 3.
In the above embodiment, the first bus 22 is also connected with the active SVG reactive power compensation device 6.
Specifically, the external power source 1 may be, but is not limited to, 110kV, the external power source 1 implements 110kV/35kV voltage reduction through the main transformer 21, the voltage of the first bus 22 is 35kV, the first bus 22 is connected to the second bus 23, and the active SVG reactive power compensation device 6 connected to the first bus 22 can rapidly absorb or emit required reactive power, so as to achieve the purpose of rapidly and dynamically adjusting reactive power. The voltage of the second bus 23 is 35 kV.
In the above embodiment, the second bus bar 23 is in the form of a single bus bar segment wiring.
Specifically, in order to improve the power supply reliability, the influence caused by faults and maintenance is limited within a certain range, and a single bus can be segmented by adopting an isolating switch or a breaker.
In the above embodiment, at least 2 external power sources 1 and power supply lines 2 form a double power supply line.
In the above described embodiment, different bus-sections of the second bus-bar 23 each connect at least 2 first bus-bars 22.
Specifically, the contact network 4 is provided with a plurality of phase separation areas 5, and each phase separation area 5 is 1 power supply subarea. At least 2 traction transformers 32 are arranged in 1 power supply subarea, and because the traction transformers 32 are supplied with power by the second buses 23 on at least 2 different power supply lines, bilateral power supply and balanced power supply in the power supply subareas can be realized.
In the above embodiment, the main transformer 21 is a "star" or "star-delta" connection.
In the above embodiment, the voltage of the external power supply 1 is 110 kV.
In the above embodiment, the voltage class of the first bus bar 22 and the second bus bar 23 is 35 kV.
In the above embodiment, the overhead line system 4 includes the ascending overhead line system 41 and the descending overhead line system 42.
Specifically, the overhead line system 4 is a main frame of the railway electrification engineering, and is a special power transmission line which is erected over a railway line and supplies power to an electric locomotive. The ascending contact network 41 and the descending contact network 42 are power transmission lines in different directions.
The present embodiment is further explained with reference to the specific implementation process, as follows:
after the voltage of the external power source 1 is reduced, the main transformer 21 outputs 35kV power to the primary side of the power transformer 31 and the primary side of the traction transformer 32, so that the power network in the current urban rail transit is effectively utilized, the utilization rate of the equipment is improved, the secondary side of the power transformer 31 supplies power to the power lighting power supply load (not shown), the primary side of the traction transformer 32 is connected with 2 phases of 35kV, the secondary side of the traction transformer 32 outputs 27.5kV, and the kV is output to the uplink catenary 41 and the downlink catenary 42 in 2 paths through overhead wires or cables. The traction transformer 32 is connected with different 2 phases of the second bus 23 respectively to reduce the influence of three-phase imbalance on the power grid. In the power supply subareas formed by the phase-splitting areas 5 on the contact network 4, because at least 2 traction transformers 32 are arranged in each power supply subarea, and the traction transformers 32 are supplied with power by the second bus 23, the bilateral power supply in the power supply subareas can be realized, and the balanced power supply can be realized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A rail transit power supply system, comprising: the power supply system comprises an external power supply, a power supply line and a plurality of load power supply lines for supplying power to a traction power supply load and a power lighting power supply load; the external power supply is connected with the input end of the power supply circuit, and the input end of the load power supply circuit is connected with the output end of the power supply circuit; each load power supply line comprises a power transformer, a traction transformer and a contact network; the primary side of the power transformer and the primary side of the traction transformer are both connected with the output end of the power supply line, the secondary side of the power transformer is connected with the power lighting power supply load, the secondary side of the traction transformer is connected with the overhead contact system, and the overhead contact system is used for supplying power to the traction power supply load; the contact net is provided with a plurality of phase separation areas, and the adjacent phase separation areas are connected with different two phases of the secondary side of the traction transformer.
2. The rail transit power supply system of claim 1, wherein the power supply line comprises a main transformer, a first bus and a second bus; the primary side of the main transformer is connected with the external power supply, the secondary side of the main transformer is connected with the first bus, the first bus is connected with the second bus, and the second bus is connected with the input end of the load power supply circuit.
3. The rail transit power supply system of claim 2, wherein the first bus is further connected with an active SVG reactive power compensation device.
4. The rail transit power supply system of claim 2, wherein the second bus bar is in the form of a single bus bar segment connection.
5. The rail transit power supply system of claim 4, wherein the number of the external power sources and the power supply lines is at least 2.
6. The rail transit power supply system of claim 5, wherein different bus segments of the second bus bar each connect at least 2 of the first bus bars.
7. The rail transit power supply system of claim 2, wherein the main transformer is a "star" or "star delta" connection.
8. The rail transit power supply system of claim 2, wherein the voltage of the external power source is 110 kV.
9. The rail transit power supply system of claim 2, wherein the first bus and the second bus are at a voltage level of 35 kV.
10. The rail transit power supply system of claim 1, wherein the overhead line system comprises an ascending overhead line system and a descending overhead line system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830141.1A CN112039085A (en) | 2020-08-18 | 2020-08-18 | Rail transit power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830141.1A CN112039085A (en) | 2020-08-18 | 2020-08-18 | Rail transit power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112039085A true CN112039085A (en) | 2020-12-04 |
Family
ID=73577574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010830141.1A Pending CN112039085A (en) | 2020-08-18 | 2020-08-18 | Rail transit power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112039085A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350342A (en) * | 2021-01-11 | 2021-02-09 | 西南交通大学 | Rail transit hybrid power supply system and unbalance control method |
-
2020
- 2020-08-18 CN CN202010830141.1A patent/CN112039085A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350342A (en) * | 2021-01-11 | 2021-02-09 | 西南交通大学 | Rail transit hybrid power supply system and unbalance control method |
| CN112350342B (en) * | 2021-01-11 | 2021-04-02 | 西南交通大学 | Rail transit hybrid power supply system and unbalance control method |
| WO2022147933A1 (en) * | 2021-01-11 | 2022-07-14 | 西南交通大学 | Rail traffic hybrid power supply system and unbalance factor control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103311924B (en) | Single-phase combined co-phased power supply and transformation structure | |
| EP3160052B1 (en) | Electric railway coaxial cable power supply system | |
| WO2022194292A1 (en) | Flexible alternating current traction power supply system for implementing through co-phase and operation method therefor | |
| US10850637B2 (en) | Electrified railway power grid system without negative sequence in whole process and without power supply networks at intervals | |
| CN103078315B (en) | Single-phase and three-phase combined in-phase power supply and transformation device | |
| CN109617044B (en) | Electrified railway in-phase power supply system based on V/V wiring | |
| CN111361462B (en) | Split-phase-free traction power supply device for electrified railway substation | |
| CN108859874A (en) | One kind is completely through alternating current traction power supply system | |
| CN101856979A (en) | Electrified railway in-phase power supply device | |
| CN112865098A (en) | Full-through type flexible traction power supply system compatible with out-of-phase power supply | |
| CN107176063B (en) | Power supply structure of external power grid of electrified railway | |
| CN109065338B (en) | In-phase traction transformer | |
| CN109215977B (en) | Traction-compensation transformer | |
| CN112039085A (en) | Rail transit power supply system | |
| CN203352187U (en) | Single-phase combined co-phased power supply and transformation device | |
| CN110588449B (en) | Traction substation power supply structure and control method thereof | |
| CN109347099B (en) | In-phase power supply system of electrified railway | |
| CN212435371U (en) | Rail transit power supply system | |
| CN206678832U (en) | A kind of electric railway subregion connects powered construction | |
| CN109484254B (en) | Power supply topological structure for passing neutral section of high-speed railway system and control method | |
| CN111251948B (en) | Rail transit traction power supply system | |
| CN109687483B (en) | Electrified railway in-phase power supply system based on SCOTT wiring | |
| CN115189354A (en) | Through type cophase power supply system structure of electrified railway | |
| CN113212253A (en) | Through type traction power supply system | |
| CN113852070B (en) | Traction and power hybrid power supply system for alternating current electric rail transit engineering |
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 |