CN105691244B - A kind of system zero load monitoring method of electric railway insertion power supply - Google Patents
A kind of system zero load monitoring method of electric railway insertion power supply Download PDFInfo
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- CN105691244B CN105691244B CN201610131506.5A CN201610131506A CN105691244B CN 105691244 B CN105691244 B CN 105691244B CN 201610131506 A CN201610131506 A CN 201610131506A CN 105691244 B CN105691244 B CN 105691244B
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- electric
- feeder
- substation
- monitor
- electric substation
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a kind of electric railway insertion electric power system zero load supervising device and its monitoring method, it is related to attached wires of AC electrified railway power supply technique field.Penetrated in electric railway and an electric substation TS is selected in electric power system0Monitor is installed；The input connection electric substation TS of monitor0Feeder current transformer measurement end, the output end of monitor is connected to the control terminal of other electric substation's feeder breakers through fiber optic network；As electric substation TS0The feeder current that is detected by feeder current transformer measurement end of monitor when being less than or equal to designated value, the feeder breaker is set to trip to the control terminal of other electric substation's feeder breakers through fiber optic network output order, otherwise other electric substation's feeder breakers still keep "on" position；It is possible thereby to the breaker that whether the accurate judgement system is in Light Condition and tripping euqalizing current is formed in the minimal cut set in loop in zero load, effectively eliminates the euqalizing current with power network formation under electric railway insertion electric power system Light Condition.
Description
Technical field
The present invention relates to attached wires of AC electrified railway power supply technique field, more particularly to electric railway to penetrate electric power system
Power supply technique.
Background technology
Electric railway is generally using the single phase industrial frequency AC system powered by municipal power supply system, to bear single-phase traction
Equilibrium assignmen, electric railway often use rotation phase sequence, the side of split-phase switched-mode power supply to lotus as far as possible in three-phase electrical power system
Case.Isolated between adjacent service area at split-phase subregion with neutral section insulator, form electric split-phase, abbreviation split-phase.Electric locomotive leads to
The traditional approach of phase splitting is to cross split-phase manually, relies primarily on driver and carries out moving back level manually, closes auxiliary unit, main open circuit of breaking
Device, cross by train inertia neutral section, again co-host break road device, close auxiliary unit and then recover traction power to complete split-phase.
This artificial commutation mode easily causes the powered logical phase splitting (crossing split-phase) of electric locomotive and arcing occurs and burns out contact net and hangs
Part is hung, even results in the accidents such as phase fault.With the continuous rise of train speed, automatic passing over of neutral section technology is employed, it is main
Have floor switches automatically switched split-phase, automatic passing over of neutral section etc. is several on vehicle-mounted automatic passing over of neutral section and post, but still suffer from out
Concern changes the electric process of transient state that middle train leads to phase splitting, is also easy to produce larger switching overvoltage or overcurrent, causes to draw
The accident such as net and mobile unit scaling loss, even results in automatic passing over of neutral section operation failure, influences power supply reliability and train is transported safely
OK.Therefore, electric split-phase link is link most weak in whole tractive power supply system, and train too mutually becomes high-speed railway and is
To the bottleneck of whole electric railway traction power supply.
Theory and practice shows to use single-phase traction transformer or combined type cophase supply technology can be with traction substation
Cancel the electric split-phase in its exit, use two-side feeding technology to cancel the electric split-phase at this in subregion.In lines join
Ground, traction substation use two-side feeding technology to be formed completely cancelling electric split-phase using cophase supply technology and subregion
Tractive power supply system, electric power system is referred to as penetrated, so as to eliminate power supply bottleneck, improve power supply capacity and transport capacity.But it is worth
It is noted that electric railway implement insertion power supply will more or less cause it is undesirable between power network and tractive power supply system
Euqalizing current (penetration).Euqalizing current (penetration) shows substantially in tractive power supply system zero load, and when load is big
Euqalizing current will be by load institute " flooding " when no-load current.The present invention can effectively eliminate equal when penetrating electric power system zero load
Weigh electric current.
The content of the invention
It is an object of the invention to provide a kind of system zero load monitoring method of electric railway insertion power supply, it can have method
Euqalizing current problem during the monitoring contact net zero load of effect ground.
The present invention solves its technical problem, and used technical scheme is：A kind of system of electric railway insertion power supply
Unloaded monitoring method, the main converter MT primary sides connection three phase network ABC of each traction substation, secondary side is through drawing bus TB, leading
Draw feeder line F and its feeder breaker K and feeder current transformer CT is connected to Traction networks OCS, leading between each traction substation
Draw net OCS to be connected to implement with the power supply that connects electric railway；One traction substation of selection is designated as electric substation TS0, its
Remaining traction substation is designated as electric substation TSi, i=1 ..., n-1, n >=2；Unloaded supervising device includes electric substation TS0Monitor
SU, electric substation TS0Feeder current transformer CT0, fiber optic network FO and each electric substation TSiFeeder breaker Ki；Monitor SU's is defeated
Enter end connection electric substation TS0Feeder current transformer CT0Measurement end MU, monitor SU output end is through fiber optic network FO connections
To each electric substation TSiFeeder breaker KiControl terminal CUi。
The purpose of the present invention is achieved through the following technical solutions：A kind of system of electric railway insertion power supply is empty
Monitoring method is carried, as electric substation TS0Monitor SU pass through feeder current transformer CT0The tractive feeder that measurement end MU is detected
When electric current is less than or equal to designated value, monitor SU arrives each electric substation TS through fiber optic network FO output ordersiFeeder breaker KiControl
End CU processediMake feeder breaker KiTrip, otherwise each electric substation TSiFeeder breaker KiHolding "on" position, i=1 ..., n-1,
n≥2.It is used for the electric railway insertion power supply system being made up of Traction networks OCS and n seat traction substation in the insertion electric power system
System.
Designated value refers to unloaded the trend value or no-load current value when electric railway insertion electric power system is flowed without train,
Mainly the charging trend or charging current of the insertion electric power system, its numerical value are much smaller than train load.
As electric substation TSi, should be as far as possible by electric substation TS during more than 20The position being positioned close among system.
Obviously, feeder breaker can be conventional mechanical switch or electronic power switch.
The present invention operation principle be：Using fiber optic network transmission capacity is big, fireballing advantage and data synchronization technology
The synchrodata of strange land traction substation is obtained, the passive network formed according to power network and electric railway insertion electric power system
Trend distribution character and electric railway insertion electric power system it is unloaded with the boundary of load (the two numerical values recited and power because
There were significant differences at number angle), unloaded the trend value or no-load current value for penetrating electric power system using electric railway are selected as designated value
Select a traction substation and (be designated as electric substation TS0) to refer to, judge whether the system is in Light Condition, and jump in zero load
The breaker that euqalizing current is formed in the minimal cut set in loop is opened, so as to eliminate euqalizing current.
Compared with prior art, the beneficial effects of the invention are as follows：
First, it is of the invention whether Light Condition, and the tripping euqalizing current in zero load the system to be in accurate judgement
The breaker formed in the minimal cut set in loop.
2nd, it is of the invention can effectively eliminate formed under electric railway insertion electric power system Light Condition with power network it is equal
Weigh electric current.
3rd, the present invention is simple in construction, and superior performance, advanced technology, method are reliable, easy to implement.
Brief description of the drawings
Fig. 1 is the insertion electric power system zero load supervising device structural representation of the embodiment of the present invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment：Fig. 1 shows the insertion electric power system structural representation of the embodiment of the present invention.A kind of electric railway insertion
The electric railway that the system zero load monitoring method of power supply is used to be made up of Traction networks OCS and n seat traction substation penetrates power supply
System；Involved device includes the main converter MT primary sides connection three phase network ABC of traction substation, and secondary side is through drawing bus
TB, tractive feeder F and its feeder breaker K and feeder current transformer CT are connected to Traction networks OCS, between each traction substation
Traction networks OCS be connected to implement to electric railway with connecting power supply；The main converter MT of traction substation is generally led
Draw transformer, or tractive transformer and the assembly of compensation device；L1, L2, L3 are train in figure；One traction of selection
Electric substation is designated as electric substation TS0, remaining traction substation is designated as electric substation TSi, i=1 ..., n-1, n >=2；The unloaded monitoring
Device is by electric substation TS0Monitor SU, electric substation TS0Feeder current transformer CT0, fiber optic network FO and each electric substation TSiFeedback
Line breaker KiComposition；Monitor SU input connection electric substation TS0Feeder current transformer CT0Measurement end MU, monitor
SU output end is connected to each electric substation TS through fiber optic network FOiFeeder breaker KiControl terminal CUi, such as dotted line institute in Fig. 1
Show, arrow represents information flow direction.
A kind of electric railway penetrates the system zero load monitoring method powered:As electric substation TS0Monitor SU pass through
Feeder current transformer CT0When the tractive feeder electric current that measurement end detects is less than or equal to designated value, monitor SU is through optical networking
Each electric substation TS is arrived in network FO output ordersiFeeder breaker KiControl terminal CUiMake feeder breaker KiTripping operation, otherwise each power transformation
Institute TSiFeeder breaker KiHolding "on" position, i=1 ..., n-1, n >=2, as shown in phantom in Figure 1.
Designated value refers to unloaded the trend value or no-load current value when electric railway insertion electric power system is flowed without train,
Mainly the charging trend or electric current of the insertion electric power system, its numerical value are much smaller than train load.
As electric substation TSi, should be as far as possible by electric substation TS during more than 20The position being positioned close among system.
The present invention operation principle be：Using fiber optic network transmission capacity is big, fireballing advantage and data synchronization technology
The synchrodata of strange land traction substation is obtained, the passive network formed according to power network and electric railway insertion electric power system
Trend distribution character and the unloaded boundary with load of electric railway insertion electric power system, select a traction substation (note
For electric substation TS0) to refer to, judge whether the system is in Light Condition, and tripping euqalizing current forms loop in zero load
Minimal cut set in breaker.
Claims (2)
1. a kind of system zero load monitoring method of electric railway insertion power supply, the main converter MT primary sides of each traction substation connect
Three phase network ABC is met, secondary side connects through drawing bus TB, tractive feeder F and its feeder breaker K with feeder current transformer CT
To Traction networks OCS, the Traction networks OCS between each traction substation is connected to implement electric railway with the power supply that connects；Its
It is characterised by：One traction substation of selection is designated as electric substation TS0, remaining traction substation is designated as electric substation TSi, i=1 ...,
n-1,n≥2；Unloaded supervising device includes electric substation TS0Monitor SU, electric substation TS0Feeder current transformer CT0, optical networking
Network FO and each electric substation TSiFeeder breaker Ki；Monitor SU input connection electric substation TS0Feeder current transformer CT0's
Measurement end MU, monitor SU output end are connected to each electric substation TS through fiber optic network FOiFeeder breaker KiControl terminal CUi；
As electric substation TS0Monitor SU pass through feeder current transformer CT0The tractive feeder electric current that measurement end MU is detected is less than or equal to
During designated value, monitor SU arrives each electric substation TS through fiber optic network FO output ordersiFeeder breaker KiControl terminal CUiMake feedback
Line breaker KiTrip, otherwise each electric substation TSiFeeder breaker KiKeep "on" position, i=1 ..., n-1, n >=2.
A kind of 2. system zero load monitoring method of electric railway insertion power supply according to claim 1, it is characterised in that：
The feeder breaker can be conventional mechanical switch or electronic power switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610131506.5A CN105691244B (en) | 2016-03-09 | 2016-03-09 | A kind of system zero load monitoring method of electric railway insertion power supply |
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|---|---|---|---|
| CN201610131506.5A CN105691244B (en) | 2016-03-09 | 2016-03-09 | A kind of system zero load monitoring method of electric railway insertion power supply |
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| CN105691244A CN105691244A (en) | 2016-06-22 |
| CN105691244B true CN105691244B (en) | 2017-12-01 |
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| CN108909541B (en) * | 2018-08-24 | 2023-06-20 | 西南交通大学 | Power supply structure for AT of electrified railway |
| CN110247365B (en) * | 2019-06-20 | 2021-06-08 | 西南交通大学 | Method for identifying fault section of electrified railway through power supply system |
| CN112428888B (en) * | 2020-12-08 | 2021-12-17 | 西南交通大学 | Emergency traction power supply method for electrified railway |
| CN114475370B (en) * | 2022-03-14 | 2023-04-07 | 西南交通大学 | Short circuit sectional protection method for contact network of cable through power supply system |
| CN114336643B (en) * | 2022-03-17 | 2022-05-17 | 西南交通大学 | System for utilizing passing power of bilateral power supply traction network of regional station and control method |
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| FR2839285B1 (en) * | 2002-05-03 | 2004-10-29 | Alstom | METHOD AND DEVICE FOR CONTROLLING AND REGULATING THE POWER CONSUMED BY A TRANSPORT SYSTEM |
| CN201333950Y (en) * | 2009-01-13 | 2009-10-28 | 西南交通大学 | 27.5KV AT traction power supply device for electrified railway |
| CN201753029U (en) * | 2010-03-12 | 2011-03-02 | 西南交通大学 | Split-phase-free through power supply device for electrified railway |
| CN104943567B (en) * | 2014-03-25 | 2017-04-19 | 株洲变流技术国家工程研究中心有限公司 | Tractive power supply system with double-current system for electrified railway and power supply method |
| CN205395812U (en) * | 2016-03-09 | 2016-07-27 | 西南交通大学 | Electric Railway link up unloaded monitoring device of system of power supply |
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