CN106828202B - A kind of reflux unit at city rail section, field wire isolated rail joint - Google Patents
A kind of reflux unit at city rail section, field wire isolated rail joint Download PDFInfo
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- CN106828202B CN106828202B CN201710102508.6A CN201710102508A CN106828202B CN 106828202 B CN106828202 B CN 106828202B CN 201710102508 A CN201710102508 A CN 201710102508A CN 106828202 B CN106828202 B CN 106828202B
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- rail
- parking lot
- section
- rolling stock
- main track
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M5/00—Arrangements along running rails or at joints thereof for current conduction or insulation, e.g. safety devices for reducing earth currents
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- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses the reflux unit IBD that a kind of reflux unit at city rail section, field wire isolated rail joint, the discrepancy line rail AR including rolling stock section or parking lot are connect with main track rail MR；Reflux unit IBD is in an off state when no train passes through, and when detecting that train passes through, issues control signal Z1=1 triggering all-controlling power electronics device V1 and V2 and simultaneously turns on.When main track support vehicle section or parking lot power, signal Z2=1 is controlled, rail bonding device IBD is connected, it is ensured that the access of traction current.The present invention can block stray electrical current to be back to the access of main track rail from rolling stock section or parking lot, reduce harm of the stray electrical current to facility in rolling stock section or parking lot, while have both the function of the assessment of insulation joint insulation performance and the measurement of rail transition resistance.
Description
Technical field
The present invention relates to rail traffic tractive power supply systems, and in particular to one kind is exhausted for city rail section, field wire rail
Reflux unit at edge section.
Background technique
Direct current 750V is generallyd use in city rail DC power-supply system or direct current 1500V power supply system, train pass through
Pantograph (or shoegear) takes stream between contact net (or conductor rail) and rail, and locomotive traction electric current is by rail return current to leading
Draw electric substation's cathode.Rolling stock section and parking lot (abbreviation section, field) is usually arranged in subway line, make respectively Train Stopping, maintenance and
The purposes of maintenance.
In order to reduce stray electrical current, city rail main track rail takes insulation against ground to install." metro stray current corrosion is anti-
Shield technical regulation " CJJ49 provide: the transition that dual-purpose is done between the subway rail to flow back and tunnel main structure (or greatly) is electric
Resistance value (is measured and is scaled the resistance value of 1km length by block section segmentation), is not less than 15 Ω * for new route
Km is not less than 3 Ω * km for working line.Rolling stock section and parking lot are mainly used for the maintenance of train, maintenance etc., to prevent vehicle
Section, parking lot interior rail current potential is excessively high causes personal safety to endanger staff, usually by the rail in column inspection library, carwash library
Road is connected with grounded screen or is grounded track by independent grounding pole.
During operation, stray electrical is formed to prevent main track traction current from flowing into the earth through the rail in rolling stock section, parking lot
Stream, usually the discrepancy line throat setting isolated rail joint in rolling stock section and parking lot be isolateds with main track rail, and arrange examine library,
Isolation rail in rail insulation joint is also provided with before carwash library.Existing technology is in parallel at position of insulation joint at two at this
Device in one-way on state is installed, device in one-way on state is made of multiple groups parallel diode, the traction in only Parking permitted field, rolling stock section
Reflux one direction flows to main track rail.
Sparking when to prevent train wheel from oversteping isolated rail joint, installation is by inverse parallel crystalline substance usually in device in one-way on state
The spark blowout of the compositions such as brake tube, when the current potential for detecting main track rail is more than rolling stock section, parking lot rail potential certain numerical value
When, trigger turn on thyristors.Just because of this, when not having train across isolated rail joint, main track leaks to the stray electrical of the earth
Stream can collect back main track rail by device in one-way on state.Stray electrical current gives parking lot, vehicle during this paths circulates
The equipment and personnel of section all brings safely great hidden danger.
If cancelling device in one-way on state herein, since the presence of isolated rail joint can block stray electrical current to flow back to just
The path of line rail, to avoid rolling stock section, the stray electrical current hidden danger in parking lot.But in this case, train passes through
When isolated rail joint, the rail of insulation joint two sides is respectively provided with different voltage, in fact it could happen that occurs when train crosses insulation joint
The case where wheel and rail are struck sparks.And when city rail main track support vehicle section, parking lot power supply, to guarantee traction current
Proper flow, and the rail at necessary electrically conducting insulation joint both ends.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of for returning at city rail section, field wire isolated rail joint
Device is flowed, the stray electrical current that city rail rail main track can be blocked to generate flows back to after collecting by parking lot, rolling stock section's interior rail
The access of main track reduces the safety that stray electrical current guarantees the harm of facility in rolling stock section, parking lot equipment and personnel.Together
When, which is integrated with isolated rail joint insulation performance evaluation function and rolling stock section, the ballast bed place's rail in parking lot over the ground
The measurement function of transition resistance.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of reflux unit at city rail section, field wire isolated rail joint,
Contact net electricity is set in city rail power supply system, between rolling stock section or parking lot and main track and is segmented DF；Main track steel
Isolated rail joint JJ1 is set between rail MR and rolling stock section or the discrepancy line rail AR in parking lot；In main track rail MR and rolling stock section
Or reflux unit IBD, the structure of the reflux unit IBD are set between the discrepancy line rail AR in parking lot are as follows:
Position sensor J1 is set between isolated rail joint JJ1 and main track rail MR, isolated rail joint JJ1 and rolling stock section or
Position sensor J2 is set between the discrepancy line rail AR in parking lot；
At the both ends isolated rail joint JJ1 reverse parallel connection all-controlling power electronics device V1 and V2 and power supply DY, switch S,
The series arm of current sensor C1 composition；
By the composite signals W that control signal Z1, Z2, Z3 are synthesized control respectively all-controlling power electronics device V1 and
V2；
The control signal Z1 is that the output of position sensor J1, J2 output train seizing signal X, Y to control device is believed
Number；Position sensor J1 detects that installation position is equipped with and exports X=1 when train occupies, and no train exports X=0 when occupying；Position
Sensor J2 detects that installation position is equipped with and exports Y=1 when train occupies, and no train exports Y=0 when occupying；
The control signal Z2 is the status signal that contact net electricity is segmented DF switch, is 0 when shutdown, and when conducting is 1；
The status signal that the control signal Z3 is switch S, is 0 when shutdown, and when conducting is 1.
Further,
Voltage sensor is disposed between the discrepancy line rail AR in isolated rail joint JJ1 and rolling stock section or parking lot
C2,C3；
Copper sulphate reference electrode RE is provided between position sensor J2 and rolling stock section AR, in the copper sulphate with reference to electricity
Voltage sensor C4 is set between pole RE and rail AR；
Current sensor C1 and voltage sensor C2, C3, C4, are connected to processor by converter.
Compared with prior art, the beneficial effects of the present invention are: the one, present invention can effectively contain city rail rail main track
The stray electrical current of generation invades rolling stock section, parking lot, while the present apparatus has both the assessment of isolated rail joint insulation performance and measures broken
The function of the transition resistance of rail over the ground at stone railway roadbed；Two, the configuration of the present invention is simple, control mode is reliable, practical function.
Detailed description of the invention
Fig. 1 is the facility installation drawing for the assessment of isolated rail joint insulation performance.
Fig. 2 is the facility installation drawing for entering and leaving the transition resistance measurement of the ballast bed place's rail of line over the ground.
Fig. 3 is structural schematic diagram of the embodiment in metro depot, parking lot.
Fig. 4 is the corresponding test object schematic diagram of control signal Z1.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Contact net electricity is set between rolling stock section or parking lot and main track and is segmented DF.Main track rail MR and rolling stock section or parking lot
Discrepancy line rail AR between be arranged isolated rail joint JJ1.Apparatus of the present invention include: main track rail MR and rolling stock section or parking lot
Discrepancy line rail AR between be arranged reflux unit IBD.
IBD is included in front of and after isolated rail joint JJ1 installation first position train detection equipment (position sensor) J1 and the
Two position train detection equipment (position sensor) J2.In the full-control type power electronic of the both ends isolated rail joint JJ1 reverse parallel connection
The series arm of device V1 and V2 and power supply DY, switch S, current sensor C1 composition.
Isolated rail joint insulation performance evaluation function and the discrepancy ballast bed upper rail transition resistance test function of line include:
One high-power DC power supply DY, power cathode connect main track rail side, and anode is connected through control switch S with current sensor C1
To rolling stock section or the side discrepancy line rail AR in parking lot；Pass through cable connection rolling stock section or the discrepancy line steel in parking lot in IBD
High precision electro the pressure sensor C2 and C3 of the longitudinal rail voltage of regular length (such as 10m) are respectively set before and after the position rail AR.
Copper sulphate is being buried with reference to electricity except isolated rail joint JJ1 horizontal distance 50m, except distance AR rail vertical range 30m
Pole RE.Voltage sensor C4 is set and detects AR rail to copper sulphate reference electrode current potential.Current sensor C1 and voltage sensor
The converted device of C2, C3 and C4 (converter) connects processor, passes through the current test information of display Dynamically Announce.
When V1, V2 simultaneously turn off state, IBD is in an off state；When V1, V2 are simultaneously turned on, IBD is on shape
State.
Reflux unit IBD is in an off state when no train passes through, and can effectively contain that the stray electrical that main track generates flows into
Invade rolling stock section or parking lot.When there is train to pass through herein, to avoid the sparking problem generated at train crosses isolated rail joint,
IBD closure is controlled in time by train position inductor J1, J2, to be electrically connected main track rail and enter and leave line rail.Simultaneously originally
Device can control IBD shutdown in no train operation, implement the assessment of isolated rail joint insulation performance and discrepancy line is ballast bed
Locate the transition resistance test of rail over the ground.
Control means of the invention are as follows:
When normal, contact net electricity is segmented DF shutdown, status signal Z2=0.When train passes through insulation joint JJ1, pass through
Mutual cooperation output the control signal Z1=1, control rail bonding device IBD of position sensor J1 and J2 are in closed state,
Guarantee that train safely passes through insulation joint JJ1.
When using the measurement function of the device, when being closed control switch S, when output controls signal Z3=1, IBD is always
It is in an off state.Current sensor C1 and voltage sensor C2, C3, C4 output signal to CPU simultaneously and carry out calculation process, lead to
Cross display screen can Dynamically Announce current time all metrical informations.
When again contact net needs normal power supply and is closed contact in the traction institute failure power loss in parking lot or rolling stock section, library
When netting electricity block switch DF, for guarantee train in parking lot or rolling stock section can normal traction current, output controls signal
Z2=1, control IBD closure, until the traction institute fault recovery in parking lot or rolling stock section, contact net electricity block switch DF is disconnected
It opens.
Fig. 1 is the facility installation drawing of isolated rail joint insulation performance assessment.It includes a high-power DC power supply DY, electricity
Source cathode connects main track rail side, and anode is connected to the discrepancy in rolling stock section or parking lot through control switch S and current sensor C1
The side line rail AR.It is respectively set before and after IBD is by the position discrepancy line rail AR in cable connection rolling stock section or parking lot
High precision electro the pressure sensor C2 and C3 of regular length (such as 10m) longitudinal direction rail voltage.C2 and C3 measures 10m length steel respectively
Longitudinal pressure drop U1 and U2 on rail.
When using the measurement function of the device, IBD begins when output control signal Z3=1 when closure control switch S is closed
It is in an off state eventually.Current sensor C1 and the converted device of voltage sensor C2, C3 (converter) connect processor, real
The online evaluation assessment of the insulation performance of existing insulation joint JJ1.Isolated rail joint insulation performance index FJIt indicates, according to
EN50122-2 (2010), works as FJIt can prove that the insulation performance of insulation joint is good greater than specified in standard 95%.FJCalculating
Formula is as follows:
In formula: U1,off, U2,offFor the 1min of record, the average value of 10m rail voltage noise；U1,on, U2,onFor rail plus
Voltage 1min average value after entering electric current.
Fig. 2 is the facility installation drawing for entering and leaving the transition resistance measurement of the ballast bed place's rail of line over the ground.It includes one
Platform high-power DC power supply DY, power cathode connect main track rail side, and anode is connected to through control switch S and current sensor C1
The side discrepancy line rail AR in rolling stock section or parking lot.Except isolated rail joint JJ1 horizontal distance 50m, distance AR steel
Copper sulphate reference electrode RE is buried except rail vertical range 30m.C4 detects AR rail to the current potential of copper sulphate reference electrode RE.When
Using the device measurement function when, be closed control switch S when output control signal Z3=1 when IBD it is in an off state always.
The measuring signal U of the measuring signal I and voltage sensor C4 of current sensor C1REConverted device (converter) connection processing
Device realizes rolling stock section AR rail transition resistance RREOn-line measurement, RRECalculation formula it is as follows:
In formula: UREIt is rail to the voltage of reference electrode；I is test Injection Current, unit A；L is tested vehicle section, stops
The length of the discrepancy line rail AR in parking lot is (maximum no more than 2km), unit km.
Fig. 3 is structural schematic diagram of the embodiment in metro depot or parking lot.Rolling stock section or parking lot and main track it
Between setting contact net electricity be segmented DF.Rail insulation is set between main track rail MR and rolling stock section or the discrepancy line rail AR in parking lot
Save JJ1.Reflux unit IBD is set between the discrepancy line rail AR in main track rail MR and rolling stock section or parking lot.
The structure of IBD are as follows: position sensor J1, isolated rail joint are set between isolated rail joint JJ1 and main track rail MR
Position sensor J2 is set between JJ1 and rolling stock section or the discrepancy line rail AR in parking lot；It is reversed at the both ends isolated rail joint JJ1
The series arm of all-controlling power electronics device V1 and V2 and power supply DY in parallel, switch S, current sensor C1 composition；By controlling
The composite signals W of signal Z1, Z2, Z3 synthesis processed controls all-controlling power electronics device V1 and V2 respectively.
Specific control process are as follows:
When normal, contact net interconnection switch DF shutdown, Z2=0；Control switch S is in an off state, Z3=0.Work as train
When going back to rolling stock section or parking lot, sensing first for position sensor J1 carrys out vehicle signal, position sensor J1, J2 output signal (X
=1, Y=0, X+Y > 0) to rail bonding device IBD control device DR immediately export control signal Z1=1, trigger full-control type
Power electronic devices V1 and V2 are simultaneously turned on；
When train drives into from main track rail MR enters and leaves line rail AR, any position sensor J1, J2 detect that train accounts for
It is believed that number, X+Y >=1, Z1=1 indicate that train passes through isolated rail joint JJ1, control full-control type electric power in reflux unit IBD
Electronic device V1 and V2 conducting.When train seizing signal is not detected in position sensor J1, J2, X+Y=0, Z1=0, table
Show that no train by isolated rail joint JJ1, controls all-controlling power electronics device V1 and V2 shutdown in reflux unit IBD.
When train drives into main track rail MR from discrepancy line AR, and so.
When the traction institute failure power loss in rolling stock section or parking lot, when main track support vehicle section or parking lot power, closure
Contact net electricity is segmented DF, Z2=1.For guarantee train in rolling stock section or parking lot can normal traction current, control reflux
All-controlling power electronics device V1 and V2 are simultaneously turned in device IBD.
Fig. 4 is the corresponding test object schematic diagram of control signal Z1.It includes the column of first position train detection equipment J1
The train seizing signal Y of vehicle seizing signal X, second position train detection equipment J2.As X+Y >=1, Z1=1；Work as X+Y=0
When, Z1=0.
Claims (2)
1. a kind of reflux unit at city rail section, field wire isolated rail joint, which is characterized in that
Contact net electricity is set in city rail power supply system, between rolling stock section or parking lot and main track and is segmented DF；Main track rail
Isolated rail joint JJ1 is set between MR and rolling stock section or the discrepancy line rail AR in parking lot；In main track rail MR and vehicle
Reflux unit IBD, the structure of the reflux unit IBD are set between section or the discrepancy line rail AR in parking lot are as follows:
Position sensor J1, isolated rail joint JJ1 and vehicle are set between isolated rail joint JJ1 and main track rail MR
Position sensor J2 is set between section or the discrepancy line rail AR in parking lot；
The both ends isolated rail joint JJ1 be parallel with all-controlling power electronics device V1, all-controlling power electronics device V2 with
And the series arm of power supply DY, switch S, current sensor C1 composition, all-controlling power electronics device V1 and full-control type electricity
Reverse parallel connection relationship is constituted between power electronic device V2；
By the composite signals W that control signal Z1, Z2, Z3 are synthesized control respectively all-controlling power electronics device V1 and
V2；The control signal Z1 is the output of position sensor J1, J2 output train seizing signal X, Y to control device
Signal；
Position sensor J1 detects that installation position is equipped with output X=1 when train occupies, and X=0 is exported when no train occupies；
Position sensor J2 detects that installation position is equipped with output Y=1 when train occupies, and Y=0 is exported when no train occupies；
The control signal Z2 is the status signal that contact net electricity is segmented DF switch, is 0 when shutdown, and when conducting is 1；
The status signal that the control signal Z3 is switch S, is 0 when shutdown, and when conducting is 1.
2. a kind of reflux unit at city rail section, field wire isolated rail joint as described in claim 1, feature
It is, is disposed with voltage sensor between the discrepancy line rail AR in isolated rail joint JJ1 and rolling stock section or parking lot
Device C2, voltage sensor C3；
It is provided with copper sulphate reference electrode RE between position sensor J2 and rolling stock section AR, is referred in the copper sulphate
Voltage sensor C4 is set between electrode RE and rail AR；
Current sensor C1 is connected everywhere with voltage sensor C2, voltage sensor C3, voltage sensor C4 by converter
Manage device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710102508.6A CN106828202B (en) | 2017-02-24 | 2017-02-24 | A kind of reflux unit at city rail section, field wire isolated rail joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710102508.6A CN106828202B (en) | 2017-02-24 | 2017-02-24 | A kind of reflux unit at city rail section, field wire isolated rail joint |
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| Publication Number | Publication Date |
|---|---|
| CN106828202A CN106828202A (en) | 2017-06-13 |
| CN106828202B true CN106828202B (en) | 2019-03-01 |
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| CN201710102508.6A Active CN106828202B (en) | 2017-02-24 | 2017-02-24 | A kind of reflux unit at city rail section, field wire isolated rail joint |
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| CN109130961B (en) * | 2017-07-06 | 2020-02-21 | 天津中铁电气化设计研究院有限公司 | Special return rail system positive line sectional design method |
| CN109130962B (en) * | 2017-07-06 | 2020-02-21 | 天津中铁电气化设计研究院有限公司 | Special return track system field segment segmentation method |
| CN107985131B (en) * | 2017-10-19 | 2020-01-10 | 北京全路通信信号研究设计院集团有限公司 | Insulating joint |
| CN108162803B (en) * | 2018-01-19 | 2023-07-18 | 中铁二院工程集团有限责任公司 | Combined directional conduction reflux device |
| CN108162809B (en) * | 2018-01-19 | 2023-07-18 | 中铁二院工程集团有限责任公司 | Directional conduction reflux device |
| CN108169569B (en) * | 2018-02-08 | 2023-06-27 | 西南交通大学 | Rail-to-drain network transition resistance monitoring system and control method thereof |
| CN108267179B (en) * | 2018-04-18 | 2024-02-20 | 湖南磁浮技术研究中心有限公司 | Device for detecting dynamic performance of collector shoe and contact rail of medium-low speed maglev train |
| CN109094427B (en) * | 2018-08-23 | 2023-09-22 | 南京铁道职业技术学院 | Subway stray current suppression system and method based on voltage compensation |
| CN109109681B (en) * | 2018-10-18 | 2023-06-09 | 西南交通大学 | Control system and control method for potential of platform steel rail of subway traction station |
| CN109470927B (en) * | 2018-11-26 | 2023-11-24 | 中铁第四勘察设计院集团有限公司 | Rail transition resistance detection system and method for rail transit |
| CN110780120B (en) * | 2019-10-17 | 2021-05-04 | 西南交通大学 | Urban rail transit direct current equipment insulation performance on-line monitoring system and control method |
| CN110920469A (en) * | 2019-11-06 | 2020-03-27 | 南京铁道职业技术学院 | Protection architecture and process for earth rail potential |
| CN113212254B (en) * | 2021-06-10 | 2023-06-20 | 贵州电网有限责任公司 | Method for reducing urban rail transit track potential by considering train stop time |
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