CN109291942A - A kind of method of trolley locomotive auto-power-cutting - Google Patents
A kind of method of trolley locomotive auto-power-cutting Download PDFInfo
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- CN109291942A CN109291942A CN201810874141.4A CN201810874141A CN109291942A CN 109291942 A CN109291942 A CN 109291942A CN 201810874141 A CN201810874141 A CN 201810874141A CN 109291942 A CN109291942 A CN 109291942A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C3/00—Electric locomotives or railcars
- B61C3/02—Electric locomotives or railcars with electric accumulators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
- B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
- B60L5/20—Details of contact bow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
-
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
A kind of method of trolley locomotive auto-power-cutting, sender unit is equipped on electric locomotive, overhead line powers on end and is equipped with signal reception power transmission starter, include following steps: one, power transmission starts, Engine Powered Bow contact aerial simultaneously opens electric locomotive total power switch, and sender unit provides a DC low-voltage U to overhead line0(I0), it is transferred to through overhead line and powers on end, powered on end and start switch device to overhead line power transmission.Two, normal power supply, overhead line obtain it is electric after, be enabling signal U first0(I0) stop conveying, followed by sender unit absorbs a smaller current from overhead line, which, which is used as, maintains current signal, and it is standby in operation in electric locomotive, allow overhead line to maintain power transmission state.Three, it automatically powers off, when locomotive is stopped transport, disconnects total power switch or pull down pantograph, sender unit and overhead line disconnect, and electric current maintains electric current to power on end after 5-10 seconds and automatically cut off overhead line power supply less than most water on line.
Description
Technical field
The present invention relates to mine down-hole transporting equipment more particularly to a kind of methods of trolley locomotive auto-power-cutting.
Background technique
DC stringing electric locomotive is one of prevailing traffic equipment of mine down-hole, and overhead line is connected using Unified Network at present
Continue the mode of power supply, long-play.Since overhead line voltage is higher (DC250V or more), mine down-hole bad environments, tunnel
Narrow, there was dampness in the air, and staff and electric locomotive are gone together a tunnel, and accordingly, there exist the security risks of personnel's electric shock, give
Management of safe operation brings certain difficulty.
Summary of the invention
It is an object of the present invention to provide a kind of trolley locomotive in place of overcome the deficiencies in the prior art and stop to send automatically
The method of electricity can effectively reduce the electrification range of overhead line, shorten the time of overhead line charging operation, make overhead line only in motor
Vehicle charges when running, without electricity when electric locomotive is stopped transport.Mine environment longer for transportation range, can allow overhead line in different zones
Sectional power supply, when electric locomotive enters certain region, the region overhead line power transmission, when electric locomotive sails out of the region, the region overhead line
Power-off can effectively promote mine safetyization level, reduce accident rate.
A kind of method of trolley locomotive auto-power-cutting of the present invention, includes sender unit and signal
Power transmission starter is received, is equipped with sender unit on electric locomotive, overhead line powers on end, that is, assembles at rectifier cabinet
There is signal to receive power transmission starter, whole system operation programs include following steps:
One, Engine Powered Bow contact aerial and electric locomotive total power switch is opened, sender unit is provided to overhead line
The direct current safety low-voltage U of one 12V or 24V0 (I0), the direct current is electrifying startup signal, U0(I0) through overhead line
It is transferred to and powers on end, power on termination and receive enabling signal, start switch device immediately to overhead line power transmission.
Two, overhead line obtain it is electric after, sender unit stop conveying enabling signal U0(I0), followed by sender unit
From overhead line absorb a smaller current, the electric current as overhead line maintain current signal, electric locomotive it is standby and transport
In row, overhead line is allowed to maintain power transmission state.
Three, it after electric locomotive is out of service, disconnects total power switch on electric locomotive or pulls down pantograph, at this moment, signal is sent
Device and overhead line disconnect, and the electric current on overhead line is less than extinction current, after 5-10 seconds, power on end and just automatically cut off frame
Ceases to be busy power supply.
Former overhead line is used only with regard to achievable complete in a kind of method of trolley locomotive auto-power-cutting of the present invention
The transmitting of portion's information.Sender unit is installed on electric locomotive, overhead line powers on end, that is, assembles signal at rectifier cabinet and connect
Sending and receiving electric starter.According to electric locomotive working condition, control system of switching on or off electricity of the system automatic implementation to overhead line.To the behaviour of locomotive
Make, with original system without any difference.It does not need to carry out any training to driver yet.
Work system of the present invention has following features:
1. electric signals are transmitted through overhead line: overhead line original place is without electric safe condition, when electric locomotive needs to run, pantograph
Prop up contact aerial, then open on vehicle after total power switch, car send starter in battery by overhead line to
The signal for powering on end receives power transmission starter conveying 12V DC voltage starting signal, and signal transfer direction is from locomotive through frame
Ceases to be busy flow direction powers on end, then enters overhead line control system of switching on or off electricity circuit through A.C. contactor CJ normally-closed contact, and control circuit is first
Postpone and absorbs portion of energy from signal.In this period, A.C. contactor CJ is not yet attracted, and rectifier cabinet does not export 250V work
Make voltage.
After the above process postpones about 1-2 seconds, the relay J in overhead line control system of switching on or off electricity circuit2It is attracted, A.C. contactor
CJ starts therewith, and normally-closed contact first cuts off overhead line control system of switching on or off electricity circuit and overhead line, then, three of them normally opened touching
Point connects rectifier bridge and exchanges input side, conveys direct current 250V operating voltage to overhead line.
2. maintaining power transmission with overhead line itself electric current: as long as having, electric locomotive is run or standby mode, aerial line current are big
Electric current I is kept in minimumH, the output voltage of mutual inductor L, which can allow, receives power transmission control circuit holding J2Attracting state remains aerial
Line continues power transmission.
Implemented 3. overhead line has a power failure by detecting itself electric current: without electric locomotive operation or standby mode, making somebody a mere figurehead line current
It is less than minimum holding electric current IH, the output voltage of mutual inductor L, which cannot allow, receives power transmission control circuit holding J2Attracting state, J2
Contactor CJ release will be interlocked, overhead line has a power failure completely.
A kind of method of trolley locomotive auto-power-cutting of the present invention, technical points are as follows:
One, mutual inductor
Current transformer of the present invention is changed for detecting overhead line operating current, and output end application is voltage
Signal.Its primary receiving powerful operating current when electric locomotive operates normally, and electric current is wanted at test point needed for powering off control
Far smaller than overhead line operating current.For ensure low current detection sensitivity and high current work reliability, take with
Lower technical measures:
1. core-theaded type structure, large velocity ratio data, voltage signal export, miniature extraordinary Current Mutual Inductance is dexterously selected in the present invention
Device, the mutual inductor have the following characteristics that
(1) core-theaded type structure: only using single turn core, and duty is small and easy for installation, little from primary circuit absorption energy, to primary circuit
Parameter does not influence substantially.
(2) voltage-type exports: transformer secondary and resistance R, and output end is changed into voltage signal output.
(3) large velocity ratio data: number of secondary turns is greater than 2000 circles, it is therefore an objective to improve amplitude output signal.
2. transformer secondary Double-wire parallel wound double half-wave rectification: mutual inductor remains logical in minimum to the test point of aerial line current
Electric current IHPlace, this data is usually in 0.3-0.5A, to obtain obviously and clearly ULSignal, transformer secondary Double-wire parallel wound,
It constitutes with tapped double half-wave rectification circuit unit.This behave, which allows, only generates a diode tube pressuring drop in switching process,
ULThe 0.7V loss of voltage can be reduced, the output of mutual inductor is transformed into voltage signal by the R in figure.
3. time grade automatic limiting voltage: output DC voltage ULWith I2There is one-to-one relationship, when there is electric locomotive operation, frame
Ceases to be busy electric current can be greater than IHSeveral hundred or even up to ten thousand times, not allow ULIt is excessively high, take two measures: first is that by mutual inductor using micro-
Type structure, selects minitype iron core, works as I2When increasing to a certain data, core sataration is allowed to limit U firstLIncrease；Second is that with 5 two
Pole pipe connects and arrives output end, using diode forward stabilizing voltage characteristic by ULIt is limited within 3.6V.
Two, energy storage delay technology measure
1. J in sender unit1Being attracted delay circuit has double delay features, J1It is allowed to postpone about 1-1.5 seconds when actuation first,
Referred to here as preceding delay, period C1-1Energy storage, J1The element circuit will appear power supply interruption, C during this in attracting process1-1To
It is attracted delay circuit electric discharge, it is interior in short-term to form uninterrupted power supply mode, it ensure that J1Attracting process is gone on smoothly, it is therefore prevented that J1It inhales
Issuable oscillation in conjunction.
When locomotive is stopped transport, disconnects locomotive total power switch or pull down pantograph, C1-1Energy storage still make J1Attracting state jail
It is kept for about 2-3 seconds by ground, referred to here as rear delay.Two kinds of effects can be obtained in this deferring procedure, first is that when locomotive normally travel, by
Pantograph will cause electric locomotive power supply and have discontinuously because jolting, J1Attracting state is kept within a certain period of time, during which can keep whole system
Working condition is constant, avoids Ting Ji Shi event.Second is that thyristor loses gate pole letter because first losing 250V power supply again when electric locomotive is stopped transport
Number firm closing, delay knot speed J1After release, battery voltage is added in thyristor anode, but gate pole, without triggering, thyristor will not
It is open-minded again.This assures batteries after shutdown to discharge to electric locomotive.
2. signal receives double delay features in power transmission starter, power transmission start-up course postpones (preceding delay): transmitting terminal
When sending enabling signal, overhead line control system of switching on or off electricity circuit is by J2Postpone to be attracted for about 1.5 seconds with CJ, period C2-5Charging delay,
C2-6Charging energy-storing, J2C when actuation2-6Electric discharge keeps M point high level in control circuit to be higher than P point, it is ensured that J2It is clear-cut to be attracted with CJ
Resolutely.
Postpone after the starting of overhead line power transmission: after overhead line power transmission, there is electric locomotive operation or standby, overhead line output electricity under line
Stream is greater than extinction current IH, transformer output voltage ULControl system of switching on or off electricity circuit can be allowed to keep J2With the firm actuation of CJ,
And J2Actuation with CJ maintains overhead line again and continues power transmission, this is an interlocking state.When electric locomotive runs or is standby, need to protect
This interlocking state is held by overhead line continued power；When electric locomotive is stopped transport, needs to destroy this interlocking state and stop by overhead line
Electricity.Delay feature after being also provided in receiving power transmission device thus is delayed about 5-10 seconds.Also there are two types of effects for it, first is that having
When electric locomotive operates normally, electric locomotive, which jolts, will cause discontinuous current, transformer output voltage ULCan be interrupted therewith, but normal work
Discontinuous current in work is generally not more than 1 second, and rear delay feature can allow control system of switching on or off electricity circuit to keep J2With the firm suction of CJ
It closes, keeps overhead line continued power.Second is that overhead line exports electric current close to zero after the electric locomotive under overhead line is all stopped transport, it is less than
Extinction current IH, after delay about 5-10 seconds, above-mentioned self-locking state is destroyed, and overhead line has a power failure.
Three, inflow side power on/off is handed in rectifier bridge
In order to allow overhead line power off after completely it is out of power, the present invention selects traditional mechanical contact-type electromagnetic switch, if with switch directly
Disconnected direct current is connected, strong electric arc is will form at contact, burns out switch in special circumstances or even disposably, this not only subtracts significantly
Lack switch life and be easy to cause Yan Chong Shi event.For this purpose, place the switch in rectifier cabinet exchange side, this measure in DC side
Power on/off effect is identical, but security performance significantly improves.
Four, the ingenious use of battery
The effect of battery has two aspects: first is that electric locomotive prestart, sends overhead line power transmission enabling signal using its energy storage；Two
It is that can provide 12V power supply in electric locomotive operation to intra-locomotive, use, save on former vehicle for electric appliance on the vehicles such as car light, loudspeaker
Overhead line voltage is become to the DC converter of 12V.
In sender unit, following technical measures are taken to battery applications:
1. relay J1Delay cell and battery-operated are attracted in different potentials section, the former " ground " is held with battery positive voltage with electricity
Position, battery would not be to J when such electric locomotive shutdown status1It is attracted delay cell electric discharge.
2. be equipped with level pressure constant current charger, locomotive it is standby and operation in battery automatic charging, full of i.e. enter floating charge shape
State will not overcharge.
3. in electric locomotive shutdown status, relay J1Locate release conditions.If at this moment having locomotive maloperation, (speed adjusting lever exists
Traveling gears), then battery will pass through R1-1、D1-1And J1Normally-closed contact discharges to locomotive, and the discharge loop D.C. resistance is very
It is small, if taking no action to, it is likely that cause battery damage.For this purpose, thyristor VT is installed in electric locomotive main circuit additional, in electric locomotive
When shutdown status, for 5V DV/DV without output, off state at thyristor VT gate pole Triggerless effectively prevents above-mentioned feelings
The generation of condition.
The above measure can ensure that the completely foolproof use of battery, non-maintaining in lifetime to exempt to maintain.
Five, overhead line main switch gently loads on-off
1. starting link in overhead line power transmission, according to the analysis of front, overhead line is served after 250V operating voltage about 1.5 seconds, electricity
Sender unit on locomotive is possible to obtain trigger signal after preceding delay time thyristor VT, then can just start electricity
Machine.
2. overhead line has a power failure, it is that master switch or pantograph leave overhead line on electric locomotive shutdown closing vehicle, makes somebody a mere figurehead line current
Less than extinction current IHAfter about 5-10 seconds, J2Interlock CJ release.
This guarantees the starting of CJ light load and releases, effectively mitigate and even have been eliminated electric arc harm, extend power on/off
The working life of main contacts and whole system also eliminates relevant security risk.
Six, the external big resistance of transmitting terminal, during overhead line power transmission, it is ensured that the overhead line when there is electric locomotive to run or is standby
Minimum running current is greater than IH , maintain overhead line power transmission state.
Seven, thyristor VT gate pole is persistently triggered using level type, when electric locomotive operation or standby mode, 5V DC/DC transformation
The input terminal and VT anode power supply synchronization of device, the 5V DC voltage that it is exported directly and persistently drive VT gate pole.Thoroughly it ensure that
Thyristor VT is reliable open-minded within the period for needing to open.
Eight, whole system has extremely strong anti-electromagnetic interference capability, and job stability is high
1. the power transmission enabling signal that transmitting terminal issues is the 12V level signal for the duration being greater than 1 second, has in signal receiving end
4700 μ F great Rong, starting moment, there are about the electric currents of 3A, this just allows enabling signal intensity much larger than common various electromagnetic interferences, together
When, capacitor can effectively absorb the interference such as all kinds of electromagnetism harmonic waves again.
2. the holding of overhead line power transmission state is allowed to be that its operating current is greater than IH, power-off is that its operating current is less than IH, overhead line
Operating current IHIt is powered off detection operating point, this quiescent potential is (or 550) direct current 250V, electric current about 0.3-0.5A, far
Much higher than all kinds of spatial electromagnetic interference strengths.
In short, this system, which stops power transmission and state, maintains signal used, the various electromagnetic interferences being much better than in working environment,
And there is absorption measure to electromagnetic interference signal, therefore, this system has extremely strong anti-electromagnetic interference capability, and job stability is high.
Nine, manual power transmission function is set
It receives and is equipped with switch K in power transmission device2-1, K2-1It disconnects, system is auto switching electricity operation；Closure switch K2-1, overhead line
Remain power transmission state, system convention mode operation.
Detailed description of the invention
Attached drawing 1 is that a kind of system of the method for trolley locomotive auto-power-cutting of the present invention constitutes schematic diagram.
Attached drawing 2 is a kind of electricity of the sender unit of the method for trolley locomotive auto-power-cutting of the present invention
Road schematic diagram.
Attached drawing 3 is that a kind of signal of the method for trolley locomotive auto-power-cutting of the present invention receives power transmission starting
The circuit diagram of device.
Attached drawing 4 is a kind of external connection of the mutual inductor of the method for trolley locomotive auto-power-cutting of the present invention
Schematic diagram.
Attached drawing 5 is a kind of internal circuit of the mutual inductor of the method for trolley locomotive auto-power-cutting of the present invention
Schematic diagram.
Specific embodiment
For convenience of description, electric locomotive working condition is divided into three kinds below.Shutdown status, i.e. bow collector be detached from overhead line or
Total power switch, the state that electric locomotive and overhead line are fully disconnected are disconnected on locomotive.Standby mode, i.e. bow collector contact aerial
And total power switch is closed on electric locomotive, but the state of motor unstart.Operating status, i.e. bow collector contact aerial, motor
Total power switch is closed on vehicle, and electrical power operates, the state of electric locomotive traveling.
Referring now to attached drawing 1, in conjunction with specific embodiments, be described as follows: a kind of trolley locomotive of the present invention is automatic
The method for stopping power transmission includes that sender unit and signal receive power transmission starter.Signal transmission is equipped on electric locomotive
Device, and every electric locomotive is equipped with a sender unit.Overhead line powers on end, that is, letter is equipped at rectifier cabinet
Number power transmission starter is received, the case where for sectional power supply, each powers on end and be equipped with a signal and receive power transmission starting dress
It sets, includes following steps:
One, Engine Powered Bow contact aerial and electric locomotive total power switch is opened, sender unit is provided to overhead line
The direct current safety low-voltage U of one 12V or 24V0 (I0), the direct current is electrifying startup signal, U0(I0) through overhead line
It is transferred to and powers on end, power on termination and receive enabling signal, start switch device immediately to overhead line power transmission.
Two, overhead line obtain it is electric after, sender unit stop conveying enabling signal U0(I0), followed by sender unit
From overhead line absorb a smaller current, the electric current as overhead line maintain current signal, electric locomotive it is standby and transport
In row, overhead line is allowed to maintain power transmission state.
Three, it after electric locomotive is out of service, disconnects total power switch on electric locomotive or pulls down pantograph, at this moment, signal is sent
Device and overhead line disconnect, and the electric current on overhead line is less than extinction current, after 5-10 seconds, power on end and just automatically cut off frame
Ceases to be busy power supply.
Referring to attached drawing 2, sender unit is assemblied on electric locomotive, and inside is equipped with 12V (or 24V) battery, and every
Electric locomotive is equipped with a sender unit.The effect of sender unit has two: first is that overhead line power on signal is sent,
Second is that being received when electric locomotive runs and is standby with the signal for powering on end after overhead line power transmission and power transmission start-up circuit linking, protected
Hold overhead line power transmission state.Now illustrate its working process and principle by taking overhead line 250V DC power-supply system as an example:
One, power transmission starts
Overhead line 250V DC power-supply system, the anode of DC power supply connect overhead line, and cathode connects rail, because rail and ground connect
Touching, traditionally selecting rail current potential is " 0 " current potential, then overhead line current potential is positive 250V.
When being run under overhead line without electric locomotive, without electricity on line.When electric locomotive will be run, it is aerial to prop up contact for pantograph on vehicle
Line is opened on vehicle after total power switch, and battery positive voltage is through R1-1、D1-1With relay J1Normally-closed contact conveys direct current to overhead line
12V voltage U0, voltage formation electric current I0As power transmission enabling signal, enabling signal conveying path warp are as follows: battery E anode → R1-1
→D1-1→J1Normally-closed contact → overhead line → powers on termination receiving apparatus, signal code I0Direction is to flow to the electricity powered on from locomotive end
Source.
The reception device for powering on end obtains signal U through overhead line0(I0) after, starting contactor is straight to overhead line conveying 250V
Operating voltage is flowed, power transmission starting step is completed.
Two, relay J1It is attracted and power transmission state is kept
After overhead line powers on, current potential rises to positive 250V, due to D1-1Unilateal conduction, 12V battery will stop conveying to overhead line
Enabling signal U0(I0).Subsequent process is analyzed in two stages.
First stage: J1Delay is attracted, J1Actuation delay circuit be double loop power supply interleaved power and there are double delay function
Energy.It is powered from overhead line and causes J1Before being attracted in this period, the current path that overhead line flow direction sends starter is: overhead line
→J1Normally-closed contact → R1-2 →D1-5 — D1-22 → battery E → rail, the D in the current path1-5 — D1-22Both ends
The metastable voltage of about 12.7V is generated, which passes through D1-2Add to J1Actuation delay circuit, temporarily provide power supply for it.
J1After being attracted delay circuit energization, by IC1、RW1、R1-4And C1-3Allow within the circuit delay of composition about 1 second or more J again1It inhales
It closes, period C1-1Meeting abundance 12V voltage, stores certain energy.Circuit delay knot speed J1Start to be attracted, J1It can be made in attracting process
It is interrupted at above-mentioned power supply, at this moment C1-1J is maintained to the circuit discharging1Attracting process is gone on smoothly, and unit electricity is formd in the short time
The uninterrupted power supply on road, is effectively prevented from J1Issuable oscillatory occurences, ensure that J in attracting process1It is attracted clear-cut reliable.
In the step, battery is after of short duration charging, capacitor C1-5The high voltage of moment can be prevented to the threat of battery.
Second stage: power transmission state is kept, relay J1After actuation, external high-power resistance R1-5Both ends obtain overhead line
Upper 250V voltage, and two DC/DC and charger input terminal at its both ends obtain it is electric.Following four link carries out simultaneously:
1,12V DC/CV output end 12V DC voltage is through D1-3It is added to J1It is attracted on delay circuit, keeps J1Stablize and is attracted.
As long as 2, electric current is greater than a certain numerical value I on overhead lineH, just it is able to maintain mounted in the reception power transmission device for powering on end aerial
Line power transmission state.And J1R after actuation1-5The current value itself drawn from overhead line is greater than IH, thus allow overhead line power shape
State is maintained.
3,14.8V charger is through D1-4Charge a battery, which is level pressure current-limiting charge device, in vehicle operation from
Dynamic charging will not be overcharged full of floating charge state is entered.
4, IGBT group is open-minded, the direct current 5V voltage of 5V DC/CV output, through VT trigger unit circuit to thyristor VT
Reliable triggering, electrical locomotive power are connected, can be operated normally thereafter.
The above power transmission starts overall process, about can be completed in 1-1.5 seconds.
Referring to attached drawing 3, what signal received that power transmission starter is set to overhead line powers on end, and is assemblied in rectifier cabinet.
Three-phase transformer T, diode D in attached drawing 32-1— D2-6Three-phase full-bridge rectifier, the filter capacitor C of composition2-1It is former rectification
Main circuit inside cabinet.It is packed into A.C. contactor CJ, with three of them normally opened contact CJ1-1、CJ1-2、CJ1-3It controls rectifier bridge and exchanges side,
Thus implement the on-off of overhead line direct current, it is the main switching device for stopping power transmission；Separately gone here and there in rectifier bridge exchange side any line
Enter a special current transformer L, detects rectifier bridge with it and exchange every phase operating current I2Size.Because of overhead line operating current
IDAny phase current virtual value I in side is exchanged with rectifier bridge2Relationship are as follows: I2 = 0.816ID , so, I is detected with L2Size be
The variation of aerial line current can be detected, L testing result is the foundation of overhead line control system of switching on or off electricity.
Transformer B, D2-9— D2-12、C2-2, 7812 and C2-3D.C. regulated power supply is constituted, is overhead line control system of switching on or off electricity electricity
Road provides 12V DC power supply.UL(IL ) it is overhead line operating current detection signal, U0(I0 ) it is that electric locomotive end is sent through overhead line
The power transmission enabling signal come.State of the control circuit according to this two paths of signals, control contactor CJ are implemented overhead line automatic
Stop power transmission control.
Referring to attached Figure 4 and 5, current transformer of the present invention is a kind of extraordinary mutual inductor, and what it was detected is overhead line
Operating current variation, but output end application is voltage signal.Its primary receiving powerful work electricity when electric locomotive operates normally
Stream, and electric current will be far smaller than overhead line operating current at test point needed for powering off control.For the spirit for ensureing low current detection
The reliability of sensitivity and high current work, takes following technical measures:
1. core-theaded type structure, large velocity ratio data, voltage signal export, miniature extraordinary Current Mutual Inductance is dexterously selected in the present invention
Device, the mutual inductor have following features:
(1) core-theaded type structure: only using single turn core, and duty is small and easy for installation, little from primary circuit absorption energy, to primary circuit
Parameter does not influence substantially.
(2) voltage-type exports: transformer secondary and resistance R, and output end is changed into voltage signal output.
(3) large velocity ratio data: number of secondary turns is greater than 2000 circles, it is therefore an objective to improve amplitude output signal.
2. transformer secondary Double-wire parallel wound double half-wave rectification: mutual inductor remains logical in minimum to the test point of aerial line current
Electric current IHPlace, this data is usually in 0.3-0.5A, to obtain obviously and clearly ULSignal, transformer secondary Double-wire parallel wound
It constitutes with tapped double half-wave rectification circuit unit, as shown in Fig. 5.This behave, which allows, only generates one two in switching process
Pole pipe tube voltage drop, ULThe 0.7V loss of voltage can be reduced, the output of mutual inductor is transformed into voltage signal by the R in figure.
3. time grade automatic limiting voltage exports DC voltage ULWith I2There is one-to-one relationship, when there is electric locomotive operation, frame
Ceases to be busy electric current can be greater than IHSeveral hundred or even up to ten thousand times, not allow ULIt is excessively high, take two measures: first is that by mutual inductor using micro-
Type structure, selects minitype iron core, works as I2When increasing to a certain data, core sataration is allowed to limit U firstLIncrease；Second is that with 5 two
Pole pipe connects and arrives output end, using diode forward stabilizing voltage characteristic by ULIt is limited within 3.6V.
Referring to attached drawing 3, it is as follows that power transmission starter specific implementation process is received using signal of the present invention:
One, overhead line power failure safe condition
Without electric locomotive operation or when electric locomotive shutdown status under overhead line, one side overhead line conveys electric current ID=0, mutual inductor L
Output UL(IL )=0, voltage comparator ic2-1Positive input terminal current potential is lower than negative terminal, IC2-1Export low level.On the other hand, by
It is run in no electric locomotive, the enabling signal also just sent without electric locomotive end, therefore U0(I0 )=0, M point current potential is 0 in circuit, electricity
Press comparator IC2-2Positive input terminal current potential is lower than negative terminal, IC2-2Also low level is exported.At this moment, triode T2Without base current, after
Electric appliance J2It is not attracted, release conditions at contactor CJ.Power failure safe condition at overhead line.
Two, power transmission starts
It is the sending device on electric locomotive first when having Engine Powered Bow contact aerial and opening general supply preparation starting
Enabling signal U is conveyed to overhead line0(I0 ), it is transferred to through overhead line and powers on end, powered on end reception circuit and obtain U0(I0 ) letter
Number, through CJ2Normally-closed contact is to C2-6Quick charge energy storage, end voltage are climbed to about 10V or more.Meanwhile through RW2-2With
D2-19To C2-5Slowly charging, when holding voltage to be more than 2V, M terminal potential is higher than the end P, IC2-2Export high level, relay J2It is attracted
And starting contactor CJ is to overhead line power transmission.During being somebody's turn to do, C2-5Charge ratio C2-6It is slow very much, C2-6Energy storage is obtained first, it is therefore an objective to
Allow J2IC during being inhaled with CJ2-2High level is persistently exported, guarantees J2It is attracted with CJ simply without bounce.C2-5The speed that charges determines should
The process lag time can pass through RW2-2It is adjusted, this process is known as the preceding deferring procedure of the circuit.
Three, power transmission state is kept
After overhead line power transmission, electric locomotive obtains electric normal operation.At this moment, it is installed at the current transformer L of rectifier bridge exchange input side
The alternating voltage of secondary output obtains DC voltage U at H point after full-wave rectificationL。ULHigher than voltage comparator ic2-1Negative input
End setting current potential UN, IC2-1High level is exported, through D2-18It is transmitted to IC2-2Positive input terminal makes IC2-2Also high level is exported, thus
Maintain J2With the attracting state of CJ, overhead line continued power is allowed.
Jolting in electric locomotive driving process can allow aerial line current to generate discontinuously, mutual inductor L primary current and secondary
Output voltage equally exists disconnection phenomenon.R in circuit2-4And C2-5There is delayed-action, J can be kept within about 10 second time2
Stablize and be attracted, has been effectively shielded from electric locomotive and the influences of factors such as has jolted.As long as having electric locomotive operation or standby, overhead line power transmission
State can all stablize holding.
Four, overhead line automatically powers off
Electric locomotive on rail is shut down, and overhead line conveys electric current IDThe output U of=0, mutual inductor LL(IL )=0, IC2-1Be lower electricity
Flat output.After about 10 seconds, C2-5End voltage drops to 2V hereinafter, IC2-2Export low level, J2It is discharged with CJ, overhead line has a power failure.
A kind of method of trolley locomotive auto-power-cutting of the present invention, can effectively reduce the electrification model of overhead line
It encloses, shortens the time of overhead line charging operation, make the overhead line only electrification in electric locomotive operation, without electricity when electric locomotive is stopped transport.It is right
In the longer mine environment of transportation range, overhead line can be allowed in different zones sectional power supply, when electric locomotive enters certain region, the area
Domain overhead line power transmission, when electric locomotive sails out of the region, region overhead line power-off can effectively promote mine safetyization level, drop
Low accident rate.
Claims (7)
1. a kind of method of trolley locomotive auto-power-cutting includes that sender unit and signal receive power transmission starting dress
It sets, sender unit is equipped on electric locomotive, overhead line powers on end, that is, is equipped with signal at rectifier cabinet and receives power transmission
Starter, which is characterized in that according to electric locomotive working condition, system automatic implementation is to the control system of switching on or off electricity of overhead line, to electricity
The operation of locomotive and original system have specifically included following steps without any difference:
One, Engine Powered Bow contact aerial and electric locomotive total power switch is opened, sender unit is provided to overhead line
The direct current safety low-voltage U of one 12V or 24V0(I0), the direct current is electrifying startup signal, U0(I0) passed through overhead line
It is handed to and powers on end, power on termination and receive enabling signal, start switch device immediately to overhead line power transmission；
Two, overhead line obtain it is electric after, sender unit stop conveying enabling signal U0(I0), followed by sender unit is from frame
On ceases to be busy absorb a smaller current, the smaller current as overhead line maintain current signal, electric locomotive it is standby and transport
In row, overhead line is allowed to maintain power transmission state；
Three, it after electric locomotive is out of service, disconnects total power switch on electric locomotive or pulls down pantograph, at this moment, sender unit
It is disconnected with overhead line, the electric current on overhead line is less than extinction current, after 5-10 seconds, powers on end and just automatically cuts off overhead line
Power supply.
2. a kind of method of trolley locomotive auto-power-cutting according to claim 1, it is characterised in that: the step
Rapid one starts for power transmission, and Engine Powered Bow is propped up and contact aerial, after opening the total power switch on electric locomotive, battery
Anode is through R1-1、D1-1With relay J1Normally-closed contact conveys direct current 12V voltage U to overhead line0, the voltage forms electric current I0
As power transmission enabling signal, enabling signal conveying path warp are as follows: battery E anode → R1-1→D1-1→J1Normally-closed contact → overhead line
→ power on termination receiving apparatus, signal code I0Direction is to flow to the power end powered on from electric locomotive end, and the signal for powering on end receives
Power transmission starter obtains signal U through overhead line0(I0) after, starting contactor conveys 250V direct-current working volts to overhead line, send
Electrically activate step completion.
3. a kind of method of trolley locomotive auto-power-cutting according to claim 1, it is characterised in that: the step
Rapid two include relay J1Delay is attracted link and power transmission state keeps link；
Relay J1Delay is attracted link, and overhead line is energized to J1Before being attracted in this period, overhead line flow direction sends starter
Current path be: overhead line → J1Normally-closed contact → R1-2 →D1-5 — D1-22 → battery E → rail, in the current path
D1-5 — D1-22Both ends generate the metastable voltage of about 12.7V, and the voltage passes through D1-2Add to J1Actuation deferred telegram
Road temporarily provides power supply, J for it1After being attracted delay circuit energization, by IC1、RW1、R1-4And C1-3The circuit delay of composition about 1 second
Allow J again above1It is attracted, period C1-1Meeting abundance 12V voltage, stores certain energy, circuit delay knot speed J1Start to be attracted, J1It is attracted
It will cause above-mentioned power supply interruption in the process, at this moment C1-1J is maintained to the circuit discharging1Attracting process is gone on smoothly, shape in the short time
At the uninterrupted power supply of element circuit, in the step, battery is after of short duration charging, capacitor C1-5It can prevent the height electricity of moment
Press the threat to battery；
Power transmission state keeps link, relay J1After actuation, external high-power resistance R1-5Both ends obtain 250V voltage on overhead line；
(1) and in the 12V DC/DC output end 12V DC voltage at its both ends through D1-3It is added to J1It is attracted on delay circuit, keeps J1
Stablize and is attracted；
(2) as long as electric current is greater than a certain numerical value I on overhead lineH, overhead line, which is just able to maintain, mounted in the signal receiving device for powering on end send
Electricity condition, and J1R after actuation1-5The current value itself drawn from overhead line is greater than IH, overhead line power supply state is thus allowed to obtain
To maintain.
4. a kind of method of trolley locomotive auto-power-cutting according to claim 3, it is characterised in that: J1After actuation
Following two links also carry out simultaneously；
(1) 14.8V charger input terminal obtains electric, and output end is through D1-4It charges a battery, the charger is level pressure current limliting
Charger, vehicle operation in automatic charging, full of i.e. enter floating charge state, will not overcharge；
(2) 5V DC/DC input terminal obtains electric, the direct current 5V voltage of output end, reliable to thyristor VT through VT trigger unit circuit
Triggering, electric locomotive power supply are connected, can be operated normally thereafter.
5. a kind of method of trolley locomotive auto-power-cutting according to claim 1, it is characterised in that: in overhead line
Power on end, three-phase transformer T, diode D2-1— D2-6The three-phase full-bridge rectifier of composition, filter capacitor C2-1It is former rectifier cabinet
Internal main circuit is packed into A.C. contactor CJ, with three of them normally opened contact CJ1-1、CJ1-2、CJ1-3It controls rectifier bridge and exchanges side, by
This implements the on-off of overhead line direct current, it is the main switching device for stopping power transmission, separately seals in rectifier bridge exchange side any line
Current transformer L, for detecting the rectifier bridge exchange every phase operating current I in side2Size, overhead line operating current IDWith rectification
Bridge exchanges any phase current virtual value I in side2Relationship are as follows: I2 = 0.816ID , so detecting I with L2Size can be detected
The variation of aerial line current, L testing result is the foundation of overhead line control system of switching on or off electricity.
6. a kind of method of trolley locomotive auto-power-cutting according to claim 5, it is characterised in that: the letter
Number receive power transmission opening device in, transformer B, D2-9— D2-12、C2-2, 7812 and C2-3D.C. regulated power supply is constituted, is overhead line
Control system of switching on or off electricity circuit provides 12V DC power supply；UL(IL ) it is overhead line operating current detection signal, U0(I0 ) it is electric locomotive
Hold the power transmission enabling signal sent through overhead line, the overhead line control system of switching on or off electricity circuit according to the state of this two paths of signals,
Control contactor CJ implements auto-power-cutting control to overhead line, and control program is as follows:
One, overhead line power failure safe condition
Without electric locomotive operation or when electric locomotive shutdown status under overhead line, one side overhead line conveys electric current ID=0, mutual inductor L
Output UL(IL )=0, voltage comparator ic2-1Positive input terminal current potential is lower than negative terminal, IC2-1Low level is exported, on the other hand, by
In no electric locomotive, the enabling signal also just sent without electric locomotive end, therefore U0(I0 )=0, M point current potential is 0 in circuit, voltage ratio
Compared with device IC2-2Positive input terminal current potential is lower than negative terminal, IC2-2Also low level is exported, at this moment triode T2Without base current, relay J2
It is not attracted, release conditions at contactor CJ, power failure safe condition at overhead line；
Two, power transmission starts
It is that the signal on electric locomotive is sent first when having Engine Powered Bow contact aerial and opening general supply preparation starting
Device conveys enabling signal U to overhead line0(I0 ), it is transferred to through overhead line and powers on end, powered on end reception circuit and obtain U0(I0 )
Signal, through CJ2Normally-closed contact is to C2-6Quick charge energy storage, end voltage are climbed to about 10V or more, while through RW2-2With
D2-19To C2-5Slowly charging, when holding voltage to be more than 2V, M terminal potential is higher than the end P, IC2-2Export high level, relay J2It is attracted
And starting contactor CJ is to overhead line power transmission, should during, C2-5Charge ratio C2-6It is slow very much, C2-6Energy storage is obtained first, it is therefore an objective to
Allow J2With IC in CJ attracting process2-2High level is persistently exported, guarantees J2It is attracted with CJ simply without bounce, C2-5The speed that charges determines
The process lag time, R can be passed throughW2-2It is adjusted, this process is known as the preceding deferring procedure of the circuit；
Three, power transmission state is kept
After overhead line power transmission, electric locomotive obtains electric normal operation, is at this moment installed at current transformer L times of rectifier bridge exchange input side
The alternating voltage of grade output obtains DC voltage U at H point after full-wave rectificationL, ULHigher than voltage comparator ic2-1Negative input end
Set current potential UN, IC2-1High level is exported, through D2-18It is transmitted to IC2-2Positive input terminal makes IC2-2Also high level is exported, is thus tieed up
J is held2With the attracting state of CJ, overhead line continued power is allowed；
Jolting in electric locomotive driving process can allow aerial line current to generate discontinuously, mutual inductor L primary current and secondary output
Voltage equally exists disconnection phenomenon, the R in circuit2-4And C2-5There is delayed-action, J can be kept within about 10 second time2Stablize
It is attracted, has been effectively shielded from locomotive and the influences of factors such as has jolted, as long as there is electric locomotive to run or standby, overhead line power transmission state is all
Holding can be stablized；
Four, overhead line automatically powers off
Electric locomotive is shut down on rail, and overhead line conveys electric current IDThe output U of=0, mutual inductor LL(IL )=0, IC2-1Be lower level
Output, after about 10 seconds, C2-5End voltage drops to 2V hereinafter, IC2-2Export low level, J2It is discharged with CJ, overhead line has a power failure.
7. a kind of method of trolley locomotive auto-power-cutting according to claim 5, it is characterised in that: Current Mutual Inductance
Device detects the variation of overhead line operating current, and output end application is voltage signal, its primary work when electric locomotive operates normally
Make that electric current is big, and electric current is much smaller than overhead line operating current at test point needed for powering off control, to ensure low current detection
The reliability of sensitivity and high current work, takes following technical measures:
(1) core-theaded type structure, large velocity ratio data, voltage signal output；
1. core-theaded type structure: single turn core is only used, duty is small and easy for installation, and it is little from primary circuit absorption energy, to primary circuit
Parameter does not influence substantially；
2. voltage-type exports: output end is changed into voltage signal output by transformer secondary and resistance R；
3. large velocity ratio data: number of secondary turns is greater than 2000 circles, it is therefore an objective to improve amplitude output signal；
(2) transformer secondary Double-wire parallel wound double half-wave rectification: mutual inductor maintains to be powered to the test point of aerial line current in minimum
Electric current IHPlace, this data is usually in 0.3-0.5A, to obtain obviously and clearly ULSignal, transformer secondary Double-wire parallel wound structure
At with tapped double half-wave rectification circuit unit, this behave allows in switching process and only generates a diode tube pressuring drop, U L
The 0.7V loss of voltage can be reduced, the output of mutual inductor is transformed into voltage signal by R；
(3) secondary automatic limiting voltage: output DC voltage ULWith I2It corresponds, when there is electric locomotive operation, makes somebody a mere figurehead line current meeting
Greater than IHSeveral hundred or even up to ten thousand times, not allow ULIt is excessively high, following measures need to be taken: first is that mutual inductor is selected micro- using microstructure
Shaped iron core works as I2When increasing to a certain data, core sataration is allowed to limit U firstLIncrease, second is that being connected and being arrived with five two poles
Output end, using diode forward stabilizing voltage characteristic by ULIt is limited within 3.6V.
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| CN201810874141.4A CN109291942B (en) | 2018-08-03 | 2018-08-03 | Method for automatically stopping and transmitting power of trolley locomotive |
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| CN109291942B (en) | 2021-02-12 |
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