CN202455051U - Bus fault backup protection device of rail traffic power supply system - Google Patents
Bus fault backup protection device of rail traffic power supply system Download PDFInfo
- Publication number
- CN202455051U CN202455051U CN201220025093XU CN201220025093U CN202455051U CN 202455051 U CN202455051 U CN 202455051U CN 201220025093X U CN201220025093X U CN 201220025093XU CN 201220025093 U CN201220025093 U CN 201220025093U CN 202455051 U CN202455051 U CN 202455051U
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- bus
- subway station
- protection device
- interval
- cable
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Abstract
The utility model provides a bus fault backup protection device of a rail traffic power supply system, which comprises a plurality of subway stations; each subway station comprises a first bus and a second bus; the first buses and the second buses of the adjacent subway stations are mutually connected serially through interval cables; circuit breaker cabinets are arranged on an outgoing wire for connecting each interval cable and the previous subway station and an incoming wire for connecting the interval cable and the next subway station; a digital communication over-current protection device F35 is arranged in an incoming circuit breaker cabinet of an incoming interval cable which is connected with the first bus or the second bus; and the other digital communication over-current protection device F35 is also arranged in an outgoing circuit breaker cabinet, connected with the previous subway station, of the incoming interval cable which is connected with the first bus or the second bus. According to the bus fault backup protection device of the rail traffic power supply system, when an incoming circuit breaker fails to work and the buses have faults, the outgoing protection device of the subway station of a higher level is used for realizing instant tripping, so that the faults are eliminated.
Description
Technical field
The utility model belongs to track traffic electric power system technical field of relay protection, is specifically related to be applied to the device that busbar fault is carried out backup protection of track traffic electric power system.
Background technology
In the track traffic electric power system; Traditional busbar fault protection scheme has only been installed the digital communication overcurrent device on the corresponding inlet wire of bus; When bus breaks down, utilize the digital communication excess current protective function on the inlet wire to realize the moving tripping operation of lead-in circuit breaker wink.When but this scheme malfunctioning situation occurs at lead-in circuit breaker, then can produce and to trip, in the problem of very first time excision fault.
The utility model content
To the problems referred to above, the applicant improves through research, and a kind of track traffic electric power system busbar fault backup protection equipment is provided at present, satisfies the requirement of relaying protection to reliability, selectivity, sensitivity, rapidity.
The technical scheme of the utility model is following:
The utility model provides a kind of track traffic electric power system busbar fault backup protection equipment, comprises a plurality of subway stations, and each subway station comprises first bus and second bus; Contact each other through a class interval cable between first bus of adjacent subway station; Contact each other through another class interval cable between second bus of adjacent subway station; At least one interval cable is connected with outlet from electric substation; The outlet that every interval cable is connected with last subway station and with inlet wire that back one subway station is connected on breaker cabinet all is installed; In the lead-in circuit breaker cabinet of the interval cable of the inlet wire that is connected with first bus or second bus, digital communication overcurrent protective device F35 is installed, the inlet wire interval that is connected with first bus or second bus cable with outlet breaker cabinet that last subway station is connected in digital communication overcurrent protective device F35 also is installed.
The useful technique effect of the utility model is:
The utility model has realized that electric power system still can guarantee the selectivity of protecting under the abnormal running state.Under the malfunctioning situation of lead-in circuit breaker, when bus breaks down, utilize the outlet protective device of higher level's subway station to realize moving tripping operation of wink, thus the excision fault.
Description of drawings
Fig. 1 is typical case's power supply section sketch map.
Fig. 2 is the logic relation picture of busbar fault backup protection.
Embodiment
Further specify below in conjunction with the embodiment of accompanying drawing the utility model.
Be convenient and analyze that choose the typical case as shown in Figure 1 section of supplying power to track traffic electric power system the whole network at present and introduce the utility model, other power supply sections are similar with it.
One, typical service area segment protect configuration:
On typical power supply zone as shown in Figure 1, show A, two subway stations of B, I bus and II bus form looped network separately, are provided with 8 circuit breakers (cabinet) on two looped networks altogether.On this power supply zone, may be because of the change of operational mode, supplier of electricity to and change to some extent.On this power supply zone, interval cable on the line breaker cabinet, all install digital communication overcurrent protective device F35.
Two, the backup protection of busbar fault:
As shown in Figure 1; With A stand to the looped network circuit at B station be example; After busbar fault takes place in the d point, if the situation of B station lead-in circuit breaker malfunctioning (tripping) occurs, the programming in logic function of the point-to-point direct communication of the protective device F35-5 through this lead-in circuit breaker then; Transmit the outlet protective device F35-2 at the failure signal of lead-in circuit breaker to higher level A station through optical fiber; Start the backup protection of busbar fault by the outlet protective device F35-2 at higher level A station, the corresponding outlet circuit breaker of tripping behind time-delay t realizes excising fast fault.Its logical relation is as shown in Figure 2.Among Fig. 2, t is time-delay, and & is and door.
Above-described only is the preferred implementation of the utility model, and the utility model is not limited to above embodiment.Be appreciated that other improvement and variation that those skilled in the art directly derive or associate under the prerequisite of the basic design that does not break away from the utility model, all should think to be included within the protection range of the utility model.
Claims (1)
1. a track traffic electric power system busbar fault backup protection equipment comprises a plurality of subway stations, and each subway station comprises first bus and second bus; Contact each other through a class interval cable between first bus of adjacent subway station; Contact each other through another class interval cable between second bus of adjacent subway station; At least one interval cable is connected with outlet from electric substation; The outlet that every interval cable is connected with last subway station and with inlet wire that back one subway station is connected on breaker cabinet all is installed; In the lead-in circuit breaker cabinet of the interval cable of the inlet wire that is connected with first bus or second bus, digital communication overcurrent protective device F35 is installed, it is characterized in that: the inlet wire interval that is connected with first bus or second bus cable with outlet breaker cabinet that last subway station is connected in digital communication overcurrent protective device F35 also is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220025093XU CN202455051U (en) | 2012-01-19 | 2012-01-19 | Bus fault backup protection device of rail traffic power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220025093XU CN202455051U (en) | 2012-01-19 | 2012-01-19 | Bus fault backup protection device of rail traffic power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202455051U true CN202455051U (en) | 2012-09-26 |
Family
ID=46870881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220025093XU Expired - Fee Related CN202455051U (en) | 2012-01-19 | 2012-01-19 | Bus fault backup protection device of rail traffic power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202455051U (en) |
-
2012
- 2012-01-19 CN CN201220025093XU patent/CN202455051U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20150119 |
|
| EXPY | Termination of patent right or utility model |