CN107769174A - It is a kind of it is new be applied to AT subregions protection device - Google Patents
It is a kind of it is new be applied to AT subregions protection device Download PDFInfo
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- CN107769174A CN107769174A CN201711145174.7A CN201711145174A CN107769174A CN 107769174 A CN107769174 A CN 107769174A CN 201711145174 A CN201711145174 A CN 201711145174A CN 107769174 A CN107769174 A CN 107769174A
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- Prior art keywords
- protection
- transformer
- differential
- line
- transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/267—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for parallel lines and wires
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- Emergency Protection Circuit Devices (AREA)
- Protection Of Transformers (AREA)
Abstract
The invention discloses it is a kind of it is new be applied to AT subregions protection device, this device can be realized to two auto-transformers of a supply arm and the protection of up-downgoing feeder line：When auto-transformer puts into operation, protection and the function such as device can put into differential, differential quick-break, shell overcurrent, decompression, AT are hauled oneself willingly into, reclosing, non electrical quantity, the protection to auto-transformer is realized；When auto-transformer is out of service, device can put into the protections such as impedance, current quick-breaking, overcurrent, reclosing and function, realize the protection to circuit.According to the different methods of operation, different relaying configurations is flexibly selected, has saved investment and maintenance cost, avoids the fault rate hauled oneself willingly into when function cooperates of conventional two auto-transformer protective devices, improves the reliability of power supply.
Description
Technical field
The present invention relates to electric railway traction power supply system field, and in particular to a kind of new high-speed railway AT subregions
Protection device.
Background technology
The high-speed railway Traction networks in China mainly use full Parallel AT traction electric network feeding system at present, have supply voltage
High, the advantages that power supply capacity is strong, power supply distance is long, power supply reliability is high.It sets AT between traction substation and subregion institute
Institute, during normal operation, the AT institutes of same supply arm and subregion institute uplink and downlink contact net parallel operation, access the AT institutes of the section
With 2 auto-transformers of configuration in subregion institute, one comes into operation, and another standby.Current conventional AT subregions, which are protected, to be directed to
An auto-transformer protective device is respectively configured in 2 auto-transformers, when operation auto-transformer breaks down, can lead to
The tripping operation of corresponding auto-transformer protective device is crossed, makes failure auto-transformer out of service, while to standby auto-transformer
Corresponding protection device sends " startup is hauled oneself willingly into " signal, when standby auto-transformer protective device receives " startup is hauled oneself willingly into " letter
After number, standby auto-transformer is put into operation, the signal transmission between two protection devices adds failure probability, to supplying
Electric reliability impacts.Conventional AT subregions are protected simultaneously is respectively configured a feeder protection equipment for uplink and downlink feeder line,
Add equipment and maintenance cost.
The content of the invention
For above-mentioned technical problem, the present invention propose a kind of new AT subregions protection device.Only pass through one
Protection device can be achieved to two auto-transformers of a supply arm and the protection of up-downgoing feeder line.By the operation of failure
Auto-transformer is out of service and the standby auto-transformer of input hauls oneself willingly into flow, realizes, reduces in a protection device
Failure probability, adds power supply reliability., can be according to difference because this protection device has the function of protection up-downgoing feeder line
The method of operation, flexible configuration defencive function realize application maximize, greatly reduce equipment and maintenance cost.
Invention is achieved through the following technical solutions：
The invention protection device can be realized to two auto-transformers of a supply arm and the guarantor of up-downgoing feeder line
Shield.There is device differential, differential quick-break, shell overcurrent, decompression, AT to haul oneself willingly into, impedance, current quick-breaking, overcurrent, coincidence
The protections such as lock, non electrical quantity and function.
The present invention a kind of new AT subregions institute protection device, protection device ac circuit collection 6 road protective currents：
The T line currents IT1 of uplink, the F line currents IF1 of uplink, the T line currents IT2 of downgoing line, the F lines of downgoing line
Electric current IF2, AT1 transformer touch shell electric current IP1, AT2 transformer touch shell electric current IP2；2 road voltages：Up feeder line T lines electricity
Press UT1, descending feeder line T line voltages UT2；
Calculated by collection electric current and voltage by vector method：Transformer T line currentsTransformer F lines electricity
StreamTransformer differential currentUplink TF electric currentsIt is descending
Circuit TF electric currentsUp impedance valueDownstream impedance value
ITF12 is up TF electric currents ITF1 second harmonic value, and ITF22 is descending TF electric currents ITF2 second harmonic value.
When auto-transformer puts into operation, device can put into differential, differential quick-break, shell overcurrent, decompression, AT certainly
The protections such as throwing, reclosing, non electrical quantity and function, realize the protection to auto-transformer；
Only differential, differential quick-break, shell overcurrent and non-ionizing energy loss, which may be configured as starting AT, hauls oneself willingly into function, and decompression
Do not start AT after trip protection and haul oneself willingly into function.
So that operating transformer is AT1 transformers as an example, after AT1 transformer faults cause trip protection, device starts AT
Function is hauled oneself willingly into, is comprised the following steps：
Step 1：Meet any one protection act condition of differential, differential quick-break, shell overcurrent and non electrical quantity, i.e., jump simultaneously
Lock DL1 and DL2；
Step 2：DL1 and DL2 whether all trippings are detected, if all trippings, trip GK1, moves back the AT1 transformers of operation
Go out operation；
Step 3：After detecting GK1 trippings, if now voltage UT2 has pressure definite value more than circuit on circuit, close a floodgate GK2,
Standby AT2 transformers are put into operation.
Step 4：After detecting GK2 combined floodgates, combined floodgate DL1 and DL2.
When meeting uplink o-volt protection operation condition, trip protection 1 acts, and trip DL1；Meet that downgoing line loses
When pressing protection act condition, trip protection 2 acts, and trip DL2；If reclosing allows, break when the condition is satisfied corresponding to coincidence
Road device；
When auto-transformer is out of service, device can put into impedance, current quick-breaking, overcurrent, reclosing etc. protection and
Function, realize the protection to circuit.
It is of the invention compared with conventional AT subregions institute relaying configuration, there is advantages below and beneficial effect：
(1) present invention is that can be achieved to two auto-transformers of a supply arm and up and down only by a protection device
The protection of row feeder line, can be according to the different methods of operation, and flexible configuration defencive function realizes that application maximizes, and greatly reduces
Equipment and maintenance cost, create huge economic benefit.
(2) realized in a protection device and function is hauled oneself willingly into the AT of two auto-transformers, avoid conventional two certainly
The fault rate hauled oneself willingly into when function cooperates of coupling protection equipment for transformer, the reliability of power supply is improved, there is wide answer
Use prospect.
Brief description of the drawings
Fig. 1 (is mutually flowed to female for AT subregions institute simplified wiring figure in the embodiment of the present invention to feeder breaker stream with contact net
Line is positive direction).
Fig. 2 is the flow chart that AT is hauled oneself willingly into the embodiment of the present invention (so that operating transformer is AT1 as an example).
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
The present embodiment be applied to AT subregions protection device can realize two auto-transformers to a supply arm
And the protection of up-downgoing feeder line.There is device differential, differential quick-break, shell overcurrent, decompression, AT to haul oneself willingly into, impedance, electric current speed
Protection and the functions such as disconnected, overcurrent, reclosing, non electrical quantity.
As shown in figure 1, being AT subregions institute simplified wiring figure in the embodiment of the present invention (to feeder breaker stream mutually with contact net
It is positive direction to flow to bus), the protection device ac circuit suitable for AT subregions of the present embodiment gathers 6 road protective currents：On
The T line currents IT1 of row line, the F line currents IF1 of uplink, the T line currents IT2 of downgoing line, the F lines electricity of downgoing line
Stream IF2, AT1 transformer touch shell electric current IP1, AT2 transformer touch shell electric current IP2；2 road voltages：Up feeder line T line voltages
UT1, descending feeder line T line voltages UT2；
Calculated by collection electric current and voltage by vector method：Transformer T line currentsTransformer F lines electricity
StreamTransformer differential currentUplink TF electric currentsDownlink
Road TF electric currentsUp impedance valueDownstream impedance value
ITF12 is up TF electric currents ITF1 second harmonic value, and ITF22 is descending TF electric currents ITF2 second harmonic value.
When auto-transformer puts into operation, device can put into differential, differential quick-break, shell overcurrent, decompression, AT certainly
The protections such as throwing, reclosing, non electrical quantity and function, realize the protection to auto-transformer.
When any protection such as differential, differential quick-break, shell overcurrent and non electrical quantity meets operation condition, device trips simultaneously
DL1 and DL2.
When device meets uplink o-volt protection operation condition, trip protection 1 acts, and trip DL1；Meet downlink
During the o-volt protection operation condition of road, trip protection 2 acts, and trip DL2；If reclosing allows, overlap when the condition is satisfied corresponding
Breaker.
Only differential, differential quick-break, shell overcurrent and non-ionizing energy loss, which may be configured as starting AT, hauls oneself willingly into function, and decompression
Do not start AT after trip protection and haul oneself willingly into function.
So that operating transformer is AT1 transformers and differential quick-break action as an example, if GK1 is closes position, device judges current
Operating transformer is AT1 transformers, if AT1 transformer failure states, fast differential over current protection acts and hauls oneself willingly into logic, including
Following steps：
Step 1：Device detects that the difference current Id of transformer is more than differential quick-break action definite value (definite value can be changed), poor
Dynamic fast tripping protection action, while the DL1 and DL2 that trips；
Step 2：DL1 and DL2 position is detected, if any one breaker fails for tripping operation, does not start AT and hauls oneself willingly into work(
Energy；The success if two breakers trip, start AT and haul oneself willingly into action logic, trip GK1, exits the AT1 transformers of operation
Operation；
Step 3：Through 6s be delayed (disconnecting switch actuation time definite value can be changed) detection GK1 position, if GK1 still for close
Position, then exit AT and haul oneself willingly into logic, report " separate refuse point " alerts；If GK1 detects now line voltage distribution UT2, if UT2 is big to divide position
There is pressure definite value (definite value can be changed) in circuit, then close a floodgate GK2, standby AT2 transformers is put into operation；
Step 4：Be delayed (time definite value can be changed) detection GK2 position through 6s, if GK2 still to divide position, exit AT from
Throw logic, report " separate and refuse to close " alarm；If GK2 is conjunction position, combined floodgate DL1 and DL2；
Step 5：Be delayed (time definite value can be changed) detection DL1 and DL2 position through 0.2s, if any one is still to divide position,
Then exit AT and haul oneself willingly into logic, report " breaker is refused to close " alarm；If DL1 and DL2 are to close position, success is hauled oneself willingly into.
Fig. 2 is the flow chart that AT is hauled oneself willingly into the embodiment of the present invention (so that operating transformer is AT1 as an example).
When auto-transformer is out of service, protection device can put into the guarantor such as impedance, current quick-breaking, overcurrent, reclosing
Shield and function, realize the protection to circuit.
Impedance, current quick-breaking, overcurrent, overcurrent, reclosing are the operation condition for meeting uplink and downlink circuit respectively
When, respectively tripping operation corresponding to uplink and downlink breaker, by taking impedance protection as an example：
When meeting the adaptive impedance protection operation condition of uplink two-period form harmonic wave locking, trip protection 1 acts, and jumps
DL1, operation condition are as follows：
1. the PT breakage lock device protection elements of uplink are not operating；
2.ITF12 ＜ KYLITF1, KYL are secondary harmonic brake coefficient definite value；
3. impedance Z 1 is in corresponding quadrangle active region；
4. time delayses arrive.
When meeting the adaptive impedance protection operation condition of downgoing line two-period form harmonic wave locking, trip protection 2 acts, and jumps
DL2, operation condition are as follows：
1. the PT breakage lock device protection elements of downgoing line are not operating；
2.ITF22 ＜ KYLITF2；
3. impedance Z 2 is in corresponding quadrangle active region；
4. time delayses arrive.
The technological thought of embodiment above only to illustrate the invention, it is impossible to protection scope of the present invention is limited with this, it is all
It is any change for being done on the basis of technical scheme according to technological thought proposed by the present invention, each falling within right of the present invention will
Ask within the protection domain of book.
Claims (7)
1. it is a kind of it is new be applied to AT subregions protection device, it is characterised in that：This device can be realized to a supply arm
Two auto-transformers and up-downgoing feeder line protection；Device has differential, differential quick-break, shell overcurrent, decompression, AT certainly
The protections such as throwing, impedance, current quick-breaking, overcurrent, reclosing, non electrical quantity and function.
2. it is a kind of it is new be applied to AT subregions protection device, it is characterised in that：The protection device ac circuit collection 6
Road protective current：The T line currents IT1 of uplink, the F line currents IF1 of uplink, downgoing line T line currents IT2, under
F line current IF2, the AT1 transformers of row line touch shell electric current IP1, AT2 transformer touch shell electric current IP2；2 road voltages：It is up
Feeder line T line voltages UT1, descending feeder line T line voltages UT2；
Calculated by collection electric current and voltage by vector method：Transformer T line currentsTransformer F line currentsTransformer differential currentUplink TF electric currentsDowngoing line
TF electric currentsUp impedance valueDownstream impedance value
ITF12 is up TF electric currents ITF1 second harmonic value, and ITF22 is descending TF electric currents ITF2 second harmonic value.
3. it is according to claim 2 suitable for AT subregions protection device, it is characterised in that：When auto-transformer is put into
Protection and the work(such as during operation, device can put into differential, differential quick-break, shell overcurrent, decompression, AT are hauled oneself willingly into, reclosing, non electrical quantity
Can, realize the protection to auto-transformer.
4. it is according to claim 3 suitable for AT subregions protection device, it is characterised in that：Only differential, differential speed
Disconnected, shell overcurrent and non-ionizing energy loss may be configured as startup AT and haul oneself willingly into function, and does not start AT after o-volt protection tripping operation and haul oneself willingly into
Function；
If operating transformer is AT1 transformers, after AT1 transformer faults cause trip protection, device starts AT and hauls oneself willingly into function；
If operating transformer is AT2 transformers, after AT2 transformer faults cause trip protection, device starts AT and hauls oneself willingly into function.
5. it is according to claim 3 suitable for AT subregions protection device, it is characterised in that：Meet uplink decompression
During protection act condition, trip protection 1 acts, and trip DL1；When meeting downgoing line o-volt protection operation condition, trip protection 2
Action, trip DL2；If reclosing allow, when the condition is satisfied overlap corresponding to breaker.
6. it is according to claim 1 suitable for AT subregions protection device, it is characterised in that：When auto-transformer exits
During operation, device can put into the protections such as impedance, current quick-breaking, overcurrent, reclosing and function, realize the protection to circuit.
A kind of 7. guard method suitable for AT subregions institute, by the realization of protection device described in one of claim 2 to 6 to one
Two auto-transformers of individual supply arm and the protection of up-downgoing feeder line, it is characterised in that：When auto-transformer puts into operation,
Only differential, differential quick-break, shell overcurrent and non-ionizing energy loss may be configured as startup AT and haul oneself willingly into function, and o-volt protection is tripped
Do not start AT afterwards and haul oneself willingly into function；
If operating transformer is AT1 transformers, after AT1 transformer faults cause trip protection, device starts AT and hauls oneself willingly into function,
Comprise the following steps：
Step 1：Meet any one protection act condition of differential, differential quick-break, shell overcurrent and non electrical quantity, i.e., trip simultaneously
DL1 and DL2；
Step 2：DL1 and DL2 whether all trippings are detected, if all trippings, trip GK1, the AT1 transformers of operation is exited fortune
OK；
Step 3：After detecting GK1 trippings, if now voltage UT2 has pressure definite value more than circuit on circuit, close a floodgate GK2, will be standby
AT2 transformers put into operation；
Step 4：After detecting GK2 combined floodgates, combined floodgate DL1 and DL2；
If operating transformer is AT2 transformers, after AT2 transformer faults cause trip protection, device starts AT and hauls oneself willingly into function,
Comprise the following steps：
Step 1：Meet any one protection act condition of differential, differential quick-break, shell overcurrent and non electrical quantity, i.e., trip simultaneously
DL1 and DL2；
Step 2：DL1 and DL2 whether all trippings are detected, if all trippings, trip GK2, the AT2 transformers of operation is exited fortune
OK；
Step 3：After detecting GK2 trippings, if now voltage UT1 has pressure definite value more than circuit on circuit, close a floodgate GK1, will be standby
AT1 transformers put into operation；
Step 4：After detecting GK1 combined floodgates, combined floodgate DL1 and DL2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711145174.7A CN107769174B (en) | 2017-11-17 | 2017-11-17 | It is a kind of suitable for AT subregion protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711145174.7A CN107769174B (en) | 2017-11-17 | 2017-11-17 | It is a kind of suitable for AT subregion protective device |
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| Publication Number | Publication Date |
|---|---|
| CN107769174A true CN107769174A (en) | 2018-03-06 |
| CN107769174B CN107769174B (en) | 2019-06-04 |
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| CN201711145174.7A Active CN107769174B (en) | 2017-11-17 | 2017-11-17 | It is a kind of suitable for AT subregion protective device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803382A (en) * | 2021-03-10 | 2021-05-14 | 中铁电气化局集团有限公司 | Full-through flexible traction power supply system contact net protection method based on current criterion |
| CN113036734A (en) * | 2020-09-21 | 2021-06-25 | 西南交通大学 | Traction network power supply arm relay protection method based on directional current increment element |
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| CN102340133A (en) * | 2011-08-17 | 2012-02-01 | 武汉英康铁路电气设备工程有限公司 | Method and device for protecting traction feeder line of single-phase power-frequency alternating-current electrified railway |
| CN102390290A (en) * | 2011-09-19 | 2012-03-28 | 余家华 | Traction power supply system capable of realizing divided power supply of uplink power supply arm and downlink power supply arm in an asynchronous transmission (AT) way |
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| CN103545790A (en) * | 2013-11-07 | 2014-01-29 | 南京国电南自轨道交通工程有限公司 | Autotransformer protecting system suitable for traction substation |
| CN103715671A (en) * | 2013-12-30 | 2014-04-09 | 西南交通大学 | High-speed railway supply arm shunt tripping protection method based on current characteristics |
| CN204118697U (en) * | 2014-06-05 | 2015-01-21 | 成都交大运达电气有限公司 | High-speed overload railway digital AT auto-transformer protective device |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20120062977A (en) * | 2010-12-07 | 2012-06-15 | 김영섭 | Selective protecting system for parallel power supply system of at system of electric railway |
| CN102340133A (en) * | 2011-08-17 | 2012-02-01 | 武汉英康铁路电气设备工程有限公司 | Method and device for protecting traction feeder line of single-phase power-frequency alternating-current electrified railway |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036734A (en) * | 2020-09-21 | 2021-06-25 | 西南交通大学 | Traction network power supply arm relay protection method based on directional current increment element |
| CN112803382A (en) * | 2021-03-10 | 2021-05-14 | 中铁电气化局集团有限公司 | Full-through flexible traction power supply system contact net protection method based on current criterion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107769174B (en) | 2019-06-04 |
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