CN108819801A - A kind of rail potential inhibition system and method - Google Patents
A kind of rail potential inhibition system and method Download PDFInfo
- Publication number
- CN108819801A CN108819801A CN201810730417.1A CN201810730417A CN108819801A CN 108819801 A CN108819801 A CN 108819801A CN 201810730417 A CN201810730417 A CN 201810730417A CN 108819801 A CN108819801 A CN 108819801A
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- Prior art keywords
- adjustable resistance
- rail potential
- value
- resistance unit
- rail
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Classifications
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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
- B60M5/02—Means for reducing potential difference between rail and adjacent ground
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rectifiers (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a kind of rail potentials to inhibit system and method, and system includes：Adjustable resistance unit, programmable controller, anti-parallel thyristor module and voltage detection module, adjustable resistance unit is connected between rail and earth mat, anti-parallel thyristor module is in parallel with adjustable resistance unit, voltage regulator module is in parallel with adjustable resistance unit, and adjustable resistance unit, anti-parallel thyristor module, voltage detection module are connect with programmable controller.Rail potential of the invention inhibits system and method that can inhibit simultaneously to rail potential and stray electrical current, it is excessive to can avoid stray electrical current leakage rate when rail potential independent control, rail potential is lifted serious problem when stray electrical current independent control, rail potential harm caused by personal safety is effectively reduced, stray electrical current is reduced to the corrosion harmfulness of structure of the subway reinforcing bar and surrounding buried pipeline, and can reduce equipment cost, occupied space is reduced, control effect is promoted.
Description
Technical field
The present invention relates to rail potential suppression technology field, in particular to a kind of rail potential inhibits system and method.
Background technique
The tractive power supply system of domestic city rail traffic at present is all made of direct current 750V or 1500V power supply, and locomotive is by contacting
Net obtains electric energy, and traction current returns to traction substation Rectification Power Factor cathode by Crane Rail.Due to the track itself that flows back
There are resistance, and system uses floating ground mode, when locomotive operation, potential difference, referred to as steel can be formed between rail and ground
Rail current potential.If the current potential is excessively high, serious harm can be generated to personal safety.Due to reflux track and the earth between it is difficult to ensure that
It is completely insulated, and as the service time lengthens, rail insulation effect gradually decline, have partial reflux electric current and leaked by rail
To greatly, stray electrical current is formed.Stray electrical current can generate electrochemistry to subway own orbit, structure reinforcing bars and attachment buried pipeline
Corrosion, causes a hidden trouble to safety of urban transit operation.
Currently, the subway line runed both at home and abroad is generally set in electric substation to inhibit rail potential and stray electrical current
There are side rail wear and drain means.Side rail wear connects rail and the earth, when detecting rail potential
When more than personal safety voltage, track and the earth are shorted, reduce rail potential.Current drainage cabinet be connected to the earth, structure reinforcing bars with
Electric substation's negative busbar (bus is connect with track) makes the stray electrical current one direction in structure reinforcing bars and the earth flow back to traction power transformation
Institute's cathode reduces etching problem caused by stray electrical current.But the method that rail potential and stray electrical current respectively independently inhibit is existing
Confirm more problem occur during the operation of field.Side rail wear has a large amount of electric currents when carrying out protectiveness combined floodgate
Directly leak to the earth, big of the electric current of numeric ratio route normal operation leakage lead to the aggravation of stray current corrosion problem more.
Drain means can reduce the earth or potential difference (rail potential when drainage between structure reinforcing bars and negative busbar when carrying out drainage
For negative value), cause all fronts rail potential to be lifted, distal end side rail wear frequent movement.The two cannot effectively combine
Control makes rail potential and stray electrical current occur control imbalance when inhibiting, not can effectively solve rail potential and ask with stray electrical current
Topic.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of rail potentials to inhibit system.Using such as
Lower technical solution：
A kind of rail potential inhibition system comprising：Adjustable resistance unit, programmable controller, anti-parallel thyristor mould
Block and voltage detection module, the adjustable resistance unit are connected between rail and earth mat, the anti-parallel thyristor module with
The adjustable resistance unit is in parallel, and the voltage regulator module is in parallel with adjustable resistance unit, the adjustable resistance unit, instead simultaneously
Connection thyristor module, voltage detection module are connect with the programmable controller.
As a further improvement of the present invention, which further includes:Fuse, the fuse and adjustable resistance unit string
Connection.
As a further improvement of the present invention, which further includes：Current detection module, the current detection module with can
In parallel with the voltage detection module after adjusting resistance unit to connect, the current detection module and the programmable controller connect
It connects.
As a further improvement of the present invention, the adjustable range of the adjustable resistance unit is 0-500 Ω.
The second purpose of the present invention is to provide a kind of rail potential suppressing methods.It adopts the following technical scheme that：
A kind of rail potential suppressing method comprising：
The resistance value of adjustable resistance unit is adjusted to maximum, wherein the adjustable resistance unit be connected to rail and earth mat it
Between；
It, will after the conducting of anti-parallel thyristor module when the rail potential is positive value, and is greater than quick-acting voltage limit value
The resistance value of the adjustable resistance unit is adjusted to zero, then, anti-parallel thyristor module is disconnected, and gradually increase the adjustable electric
The resistance value of unit is hindered, meanwhile, by voltage detection module real-time detection rail potential, so that rail potential is equal to voltage and adjust limit
Value, wherein the anti-parallel thyristor module and the adjustable resistance wired in parallel；
When the rail potential is positive value, and is greater than voltage adjusting limit value and is less than or equal to quick-acting voltage limit value, turn down
The resistance value of the adjustable resistance unit makes rail potential be equal to voltage and adjusts limit value.
As a further improvement of the present invention, this method further includes：
When the rail potential is negative value, and is greater than negative sense quick-acting voltage limit value, anti-parallel thyristor module is connected
Afterwards, the resistance value of the adjustable resistance unit is adjusted to zero, then, anti-parallel thyristor module is disconnected, and adjusted described adjustable
The resistance value of resistance unit makes drainage current value be equal to Stray current values；
When the rail potential be negative value, and be greater than negative voltage adjust limit value and be less than or equal to negative sense quick-acting voltage limit value
When, the resistance value for adjusting the adjustable resistance unit makes drainage current value be equal to Stray current values.
As a further improvement of the present invention, this method further includes：
When the rail potential is positive value, and is less than quick-acting voltage limit value, the resistance value of adjustable resistance unit is maintained at
Maximum rating.
As a further improvement of the present invention, this method further includes：The adjustable range of the adjustable resistance unit is 0-500
Ω。
Beneficial effects of the present invention：
Rail potential of the invention inhibits system and method that can inhibit simultaneously to rail potential and stray electrical current, can keep away
It is excessive to exempt from stray electrical current leakage rate when rail potential independent control, rail potential lifting is serious when stray electrical current independent control asks
Rail potential harm caused by personal safety is effectively reduced in topic, and it is buried to structure of the subway reinforcing bar and surrounding to reduce stray electrical current
The corrosion harmfulness of pipeline, and can reduce equipment cost, occupied space is reduced, control effect is promoted.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that rail potential inhibits system in the embodiment of the present invention.
Description of symbols：C1：Programmable controller；C2:Adjustable resistance unit；C3:Anti-parallel thyristor module；C4:Electric current inspection
Survey module；C5:Voltage detection module；C6:Fuse.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 1, inhibiting system for the rail potential in the present embodiment, which includes：Programmable controller C1, can
Adjust resistance unit C2, anti-parallel thyristor module C3, current detection module C4, voltage detection module C5, fuse C6。
Adjustable resistance unit C2, current detection module C4With fuse C6Three series connection after with voltage detection module C5Parallel connection,
Adjustable resistance unit C2, current detection module C4With fuse C6It is connected between rail and earth mat after three's series connection, inverse parallel is brilliant
Brake tube module C3With adjustable resistance unit C2Parallel connection, adjustable resistance unit C2, anti-parallel thyristor module C3, current detection module
C4, voltage detection module C5With programmable controller C1Connection.
Current detection module C4For sensed current signal and the current signal that will test is sent to programmable controller
C1, voltage detection module C5For detectable voltage signals and the voltage signal that will test is sent to programmable controller C1, can compile
Range controller C1It is adjusted instead simultaneously for receiving above-mentioned current signal and voltage signal, and according to above-mentioned current signal and voltage signal
Join thyristor module C3State and adjustable resistance unit C2Resistance value.
Its workflow is as follows：First by adjustable resistance unit C2Resistance value be adjusted to maximum, voltage detection module C5Detect rail
Current potential is simultaneously sent to programmable controller C1, programmable controller C1It is identified after receiving rail potential signal, when rail electricity
Position be positive value, and be greater than quick-acting voltage limit value when, by anti-parallel thyristor module C3After conducting, by adjustable resistance unit C2Resistance
Value is adjusted to zero, then by anti-parallel thyristor module C3It disconnects, and gradually increases adjustable resistance unit C2Resistance value, meanwhile, pass through
Voltage detection module C5Real-time detection rail potential makes rail potential be equal to voltage and adjusts limit value；When rail potential be positive value, and
When adjusting limit value greater than voltage and be less than or equal to quick-acting voltage limit value, programmable controller C1Turn down adjustable resistance unit C2Resistance
Value makes rail potential be equal to voltage and adjusts limit value；When rail potential is negative value, and is greater than negative sense quick-acting voltage limit value, can compile
Range controller C1By anti-parallel thyristor module C3Conducting, and by adjustable resistance unit C2Resistance value be adjusted to zero, then, will instead simultaneously
Join thyristor module C3It disconnects, and adjusts adjustable resistance unit C2Resistance value, and real-time reception current detection module C4Electric current letter
Number, so that drainage current value is equal to Stray current values；When rail potential be negative value, and be greater than negative voltage adjust limit value and be less than etc.
When negative sense quick-acting voltage limit value, programmable controller C1Adjust adjustable resistance unit C2Resistance value, and real-time reception current detecting
Module C4Current signal, make drainage current value be equal to Stray current values.
In the present embodiment, adjustable resistance unit C2Adjustable range be 0-500 Ω, in the other embodiment of the present invention
In, adjustable resistance unit C2Adjustable range can according to need any setting.
Rail potential suppressing method in the present embodiment, includes the following steps：
Step S10, the resistance value of adjustable resistance unit is adjusted to maximum；
Wherein, adjustable resistance unit is connected between rail and earth mat, under original state, by the resistance of adjustable resistance unit
Value is adjusted to maximum, can circuit conducting after effective protection circuit, be also connected in the present embodiment, between rail and earth mat molten
Disconnected device, fuse are connected with adjustable resistance unit, and for protecting circuit, protection circuital current is no more than limiting design value, guarantees electricity
Road safe operation.
Step S21, when rail potential is positive value, and is greater than quick-acting voltage limit value, anti-parallel thyristor module is connected
Afterwards, the resistance value of adjustable resistance unit is adjusted to zero, then, anti-parallel thyristor module is disconnected, and gradually increase adjustable resistance
The resistance value of unit, meanwhile, by voltage detection module real-time detection rail potential, so that rail potential is equal to voltage and adjust limit value；
Wherein, voltage quick-action limit value takes the limit value 90V of rail potential protection act as defined in standard, and voltage adjusts limit value can
If such as 80V then adjusts adjustable resistance unit when more than 80V, and voltage is made to maintain 80V.
Specifically, by detecting rail potential with the voltage detection module of adjustable resistance wired in parallel, when rail potential is
Positive value, and be greater than quick-acting voltage limit value when, it may occur however that contact net short circuit, at this point, by anti-parallel thyristor module conducting will
Rail and earth mat are shorted.
Step S22, when rail potential is positive value, and is greater than voltage adjusting limit value and is less than or equal to quick-acting voltage limit value,
The resistance value for turning down adjustable resistance unit makes rail potential be equal to voltage and adjusts limit value.
Specifically, detection position rail can be leaked to the earth when voltage detection module detects that rail potential is positive value
Electric current, the position do not need to carry out drainage.When rail potential be positive value, and be greater than voltage adjust limit value and be less than or equal to quick-action electricity
When pressing limit value, at this point, rail potential alreadys exceed personal safety voltage limits.The resistance value of adjustable resistance unit should be reduced, so that
Rail potential reduces.
Step S23, when rail potential is negative value, and is greater than negative sense quick-acting voltage limit value, by anti-parallel thyristor module
After conducting, the resistance value of adjustable resistance unit is adjusted to zero, then, anti-parallel thyristor module is disconnected, and adjust adjustable resistance
The resistance value of unit makes drainage current value be equal to Stray current values；
Step S24, when rail potential be negative value, and be greater than negative voltage adjust limit value and be less than or equal to negative sense quick-acting voltage
When limit value, the resistance value for adjusting adjustable resistance unit makes drainage current value be equal to Stray current values.
Preferably, this method is further comprising the steps of：
When rail potential is positive value, and is less than voltage adjusting limit value, the resistance value of adjustable resistance unit is maintained at maximum
State.
Specifically, when rail potential be positive value, and be less than voltage adjust limit value when, rail potential be lower than personal safety voltage
Limit value, adjustable resistance unit resistance adjustment to maximum, to reduce the leakage rate of the position electric current.
Beneficial effects of the present invention：
Rail potential of the invention inhibits system and method that can inhibit simultaneously to rail potential and stray electrical current, can keep away
It is excessive to exempt from stray electrical current leakage rate when rail potential independent control, rail potential lifting is serious when stray electrical current independent control asks
Rail potential harm caused by personal safety is effectively reduced in topic, and it is buried to structure of the subway reinforcing bar and surrounding to reduce stray electrical current
The corrosion harmfulness of pipeline, and can reduce equipment cost, occupied space is reduced, control effect is promoted.
Above embodiments are only to absolutely prove preferred embodiment that is of the invention and being lifted, and protection scope of the present invention is not
It is limited to this.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in guarantor of the invention
Within the scope of shield.Protection scope of the present invention is subject to claims.
Claims (8)
1. a kind of rail potential inhibits system, which is characterized in that including：Adjustable resistance unit, programmable controller, inverse parallel are brilliant
Brake tube module and voltage detection module, the adjustable resistance unit are connected between rail and earth mat, the anti-parallel thyristor
Module is in parallel with the adjustable resistance unit, and the voltage regulator module is in parallel with adjustable resistance unit, the adjustable resistance list
Member, anti-parallel thyristor module, voltage detection module are connect with the programmable controller.
2. rail potential as described in claim 1 inhibits system, which is characterized in that further include:Fuse, the fuse with
Adjustable resistance unit series connection.
3. rail potential as described in claim 1 inhibits system, which is characterized in that further include：Current detection module, the electricity
Stream detection module connect with adjustable resistance unit after it is in parallel with the voltage detection module, the current detection module with it is described can
Programmable controller connection.
4. rail potential a method according to any one of claims 1-3 inhibits system, which is characterized in that the tune of the adjustable resistance unit
Adjusting range is 0-500 Ω.
5. a kind of rail potential suppressing method, which is characterized in that including：
The resistance value of adjustable resistance unit is adjusted to maximum, wherein the adjustable resistance unit is connected between rail and earth mat；
It, will be described after the conducting of anti-parallel thyristor module when the rail potential is positive value, and is greater than quick-acting voltage limit value
The resistance value of adjustable resistance unit is adjusted to zero, and then, anti-parallel thyristor module is disconnected, and gradually increases the adjustable resistance list
The resistance value of member, meanwhile, by voltage detection module real-time detection rail potential, so that rail potential is equal to voltage and adjusts limit value,
In, the anti-parallel thyristor module and the adjustable resistance wired in parallel；
When the rail potential is positive value, and is greater than voltage adjusting limit value and is less than or equal to quick-acting voltage limit value, turn down described
The resistance value of adjustable resistance unit makes rail potential be equal to voltage and adjusts limit value.
6. rail potential suppressing method as claimed in claim 5, which is characterized in that further include：
It, will after the conducting of anti-parallel thyristor module when the rail potential is negative value, and is greater than negative sense quick-acting voltage limit value
The resistance value of the adjustable resistance unit is adjusted to zero, and then, anti-parallel thyristor module is disconnected, and adjusts the adjustable resistance list
The resistance value of member makes drainage current value be equal to Stray current values；
When the rail potential is negative value, and is greater than negative voltage adjusting limit value and is less than or equal to negative sense quick-acting voltage limit value,
The resistance value for adjusting the adjustable resistance unit makes drainage current value be equal to Stray current values.
7. rail potential suppressing method as claimed in claim 5, which is characterized in that further include：
When the rail potential is positive value, and is less than quick-acting voltage limit value, the resistance value of adjustable resistance unit is maintained at maximum
State.
8. the rail potential suppressing method as described in claim 5-7 is any, which is characterized in that further include：The adjustable resistance
The adjustable range of unit is 0-500 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730417.1A CN108819801B (en) | 2018-07-05 | 2018-07-05 | Steel rail potential suppression system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730417.1A CN108819801B (en) | 2018-07-05 | 2018-07-05 | Steel rail potential suppression system and method |
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| Publication Number | Publication Date |
|---|---|
| CN108819801A true CN108819801A (en) | 2018-11-16 |
| CN108819801B CN108819801B (en) | 2021-06-01 |
Family
ID=64135523
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810730417.1A Active CN108819801B (en) | 2018-07-05 | 2018-07-05 | Steel rail potential suppression system and method |
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| CN109703418A (en) * | 2019-02-13 | 2019-05-03 | 盾石磁能科技有限责任公司 | The system and method for solving the problems, such as rail potential with energy storage device |
| CN109941154A (en) * | 2019-03-25 | 2019-06-28 | 中国矿业大学 | A kind of system and method limiting rail voltage |
| CN110209232A (en) * | 2019-05-14 | 2019-09-06 | 中国矿业大学 | A kind of DC Electronic Loads Three-loop control method limiting rail voltage |
| CN112968306A (en) * | 2021-02-02 | 2021-06-15 | 西南交通大学 | Self-adaptive adjustable resistance grounding system suitable for electric rail transit |
| CN113541113A (en) * | 2021-06-11 | 2021-10-22 | 广州燃气集团有限公司 | Drainage method and device of stray current drainage device |
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| CN113541113A (en) * | 2021-06-11 | 2021-10-22 | 广州燃气集团有限公司 | Drainage method and device of stray current drainage device |
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|---|---|
| CN108819801B (en) | 2021-06-01 |
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