CN202455048U - Bus failure main protection device of track traffic power supply system - Google Patents
Bus failure main protection device of track traffic power supply system Download PDFInfo
- Publication number
- CN202455048U CN202455048U CN201220025086XU CN201220025086U CN202455048U CN 202455048 U CN202455048 U CN 202455048U CN 201220025086X U CN201220025086X U CN 201220025086XU CN 201220025086 U CN201220025086 U CN 201220025086U CN 202455048 U CN202455048 U CN 202455048U
- Authority
- CN
- China
- Prior art keywords
- bus
- interval
- protection device
- main protection
- subway station
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model provides a bus failure main protection device of a track traffic power supply system. The bus failure main protection device comprises a plurality of subway stations. Each subway station comprises a first bus and a second bus. The first buses of adjacent subway stations are connected with each other in series through a group of interval cables. The second buses of adjacent subway stations are connected with each other in series through another group of interval cables. At least one interval cable is connected with an outlet line from a substation. A circuit breaker cabinet is respectively arranged on an outlet wire of each interval cable connected with a previous subway station and on an inlet wire of each interval cable connected with the next subway station. A digital communication overcurrent protection device F35 is arranged in an inlet wire breaker cabinet of inlet wire interval cables connected with the first buses or the second buses. The bus failure main protection device solves the problem of fast isolation of bus failures. When the bus failures occur, instant tripping is achieved by using a digital communication overcurrent protection function.
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 main protection of track traffic electric power system.
Background technology
In the track traffic electric power system; Traditional busbar fault protection scheme is on the corresponding inlet wire of bus, to install overcurrent protective device; When busbar fault takes place when; Overcurrent protective device delay protection tripping operation on the inlet wire, because overcurrent protective device protection speed is very slow, busbar fault is easy to cause that equipment burns out.
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 main 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 main 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 inlet wire interval cable that is connected with first bus or second bus, digital communication overcurrent protective device F35 is installed.
The useful technique effect of the utility model is:
The utility model has solved the quick isolating problem of busbar fault.When bus breaks down, utilize the digital communication excess current protective function to realize moving tripping operation of wink, reliably locking when external area error.
Description of drawings
Fig. 1 is typical case's power supply section sketch map.
Fig. 2 is the logic relation picture of busbar fault main protection.
Fig. 3 is the logic relation picture of PT break alarm.
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, the lead-in circuit breaker of interval cable is all installed digital communication overcurrent protective device F35 cashier's office in a shop.
Two, busbar fault main protection:
As shown in Figure 1; With A stand to the looped network circuit at B station be example; If busbar faults such as the generation of d point is alternate, ground connection; Inlet wire has the overcurrent enabling signal and feeder line, outlet all do not have the overcurrent enabling signal, promptly judges to be this section busbar fault, is realized the instantaneous tripping operation (the correlation technique data elaborate in the relay technical specification) of lead-in circuit breaker by the digital communication overcurrent protective device F35-3 of the inlet wire at B station; Tripping all and fault bus have the turnover line of electrical communication, also haul oneself willingly into for next step simultaneously and prepare.Its logical relation is as shown in Figure 2.Among Fig. 2, & is and door.
Engineering Projects: bus PT (voltage transformer) high-pressure side is because laboratory technician's error causes the artificial ground fault one time with the cabinet short circuit.Thereby the main protection of protective device bus is swift in motion to trip and avoids the generation of a serious accident in the test.
Annotate: the protection solution for the PT fault is following:
(1) warning function: the voltage transformer heating for producing because of the electric power system harmonic wave, cause secondary voltage unstable, protective device has PT break alarm function, and its logic is as shown in Figure 3.Among Fig. 3, & is and door.
(2) the time defencive function of PT catastrophe failure: as causing single-phase earthing or line to line fault because of the inner quick fuse of PT; Traditional overcurrent preparation time maybe be because power supply progression be too much; And cause operate time long (about 2S), make primary equipment receive very big impact, but the digital communication overcurrent protection can be excised fault fast through the bus main protection; Section breaker, bus main protection are no more than 50ms operate time.
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 main 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, it is characterized in that: in the lead-in circuit breaker cabinet of the inlet wire interval cable that is connected with first bus or second bus, digital communication overcurrent protective device F35 is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220025086XU CN202455048U (en) | 2012-01-19 | 2012-01-19 | Bus failure main protection device of track traffic power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220025086XU CN202455048U (en) | 2012-01-19 | 2012-01-19 | Bus failure main protection device of track traffic power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202455048U true CN202455048U (en) | 2012-09-26 |
Family
ID=46870878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220025086XU Expired - Fee Related CN202455048U (en) | 2012-01-19 | 2012-01-19 | Bus failure main protection device of track traffic power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202455048U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836211A (en) * | 2014-12-30 | 2015-08-12 | 国网浙江海盐县供电公司 | Bus fault locking system and locking method |
| CN106921147A (en) * | 2017-03-30 | 2017-07-04 | 北京交通大学长三角研究院 | The incoming line switch cabinet protection device and its method of urban track traffic traction substation |
-
2012
- 2012-01-19 CN CN201220025086XU patent/CN202455048U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836211A (en) * | 2014-12-30 | 2015-08-12 | 国网浙江海盐县供电公司 | Bus fault locking system and locking method |
| CN106921147A (en) * | 2017-03-30 | 2017-07-04 | 北京交通大学长三角研究院 | The incoming line switch cabinet protection device and its method of urban track traffic traction substation |
| CN106921147B (en) * | 2017-03-30 | 2019-10-29 | 北京交通大学长三角研究院 | The incoming line switch cabinet protective device and its method of urban track traffic traction substation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jovcic et al. | Feasibility of DC transmission networks | |
| CN102684175B (en) | A kind of implementation method of micro-capacitance sensor protection | |
| Prasai et al. | Protection of meshed microgrids with communication overlay | |
| CN202455055U (en) | Current selective tripping and large-zone power supply protecting system of rail transit power supply system | |
| CN104078946B (en) | A kind of wide area distance protecting method towards transformer station | |
| CN104300580B (en) | The reclosing method containing distributed power source power distribution network based on Wide-area Measurement Information | |
| CN104362599A (en) | Method for protecting low-voltage bus of intelligent substation | |
| CN102623967A (en) | Medium-low voltage bus electrical arc light protection method and system | |
| CN103368081A (en) | Main electrical connection of double-bus disconnecting link section | |
| CN103412239B (en) | Detecting and positioning method of bus coupler flashover fault in subway alternating current power system | |
| CN201601481U (en) | Arc light protecting device | |
| CN202455048U (en) | Bus failure main protection device of track traffic power supply system | |
| CN202550499U (en) | Arc light protection system for middle-low-voltage busbar | |
| CN208142825U (en) | A kind of high voltage bus rapid protecting device | |
| Ranjbar et al. | Comprehensive protection of medium-voltage microgrids | |
| CN105807193A (en) | Same-frequency same-phase voltage withstanding test device with safety sampling signals | |
| CN103066560B (en) | The method of current protection performance is improved under the short string articulating multi-stage cascade mode of connection | |
| CN204578068U (en) | Line transformer group non-electricity protecting device and system | |
| CN205304391U (en) | Voltage switches return circuit | |
| CN202455049U (en) | Feeder failure backup protection device of track traffic power supply system | |
| CN204012700U (en) | Power network neutral point grounding system | |
| CN204992580U (en) | Expanded not repeated fixed measuring equipment of dual power supply | |
| CN210443803U (en) | 220kV HGIS power distribution device applied to single bus sectional wiring of transformer substation | |
| CN103018631A (en) | System for 10kV fault line detection | |
| CN202455051U (en) | Bus fault backup protection device of rail traffic power supply system |
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 |