CN101934745B - Position sensor for electrified railway vehicles - Google Patents
Position sensor for electrified railway vehicles Download PDFInfo
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- CN101934745B CN101934745B CN2010102954336A CN201010295433A CN101934745B CN 101934745 B CN101934745 B CN 101934745B CN 2010102954336 A CN2010102954336 A CN 2010102954336A CN 201010295433 A CN201010295433 A CN 201010295433A CN 101934745 B CN101934745 B CN 101934745B
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Abstract
The invention relates to a position sensor for electrified railway vehicles. The position sensor consists of a current transformer and three branches, wherein the current transformer has a core-perforating structure; and two leading-out terminals of a winding are connected with the three branches, a first branch is formed by connecting n diodes in series according to the sequence of a cathode and then an anode, a second branch is formed by connecting n diodes in series according to the sequence of the cathode and then the anode, the diodes of the second branch are in inverse-parallel connection with those of the first branch, and a third branch is formed by connecting a resistor with an optical fiber launching head in series. When locomotives drive, current flows through a contact net, and after monitoring the current, the sensor sends an optical signal; the optical signal is transmitted to a controller of a ground automatic neutral-section passing device through an optical fiber and is converted into an electric signal in the controller, namely a position signal of the locomotives. The position sensor solves the problems of low detection accuracy, unsuitability for mixed-running routes of various locomotives, unsuitability for high speed and extremely-low speed and unsuitability for electrified railways of alternating-current power supply in the conventional position sensor for the electrified vehicles, and positions the positions of pantograph type current collectors of the locomotives accurately.
Description
Technical field
The invention belongs to the sensor detecting field, relate in particular to a kind of sensor device that the position of electric locomotive is monitored.
Background technology
In the electrified railway, electric locomotive is adopted single phase power supply.In order to reduce the overbalance influence of railway single-phase load to three-phase electrical power system, the traction net adopts the method for segmentation phase-splitting power supply, in whole traction net, takes the A-B-C-A-B-C three-phase pattern of power supply by turns.One section power supply dead band is arranged between adjacent two phases, be called electric phase-separating section, also be called the neutral zone, general every 25km ~ 30km just has a phase-separating section.
When electric locomotive passes through phase-separating section, according to the prompting of " breaking " and identify in ground, the operation that the driver manually moves back level, closes auxiliary unit, breaks off main circuit breaker of railway engine; Locomotive " closes " prompting that identifies through behind the phase-separating section according to ground, and the driver recovers aforesaid operations item by item.This is a kind of phase-splitting of cutting off the power supply, and in the neutral zone, locomotive outage back relies on inertia to continue to slide, owing to there is not tractive force, train is under the influence of windage and wheel-rail friction resistance, and speed can reduce, and in high speed train and heavy haul train, makes a very bad impression.On the other hand, this operation has increased driver's labour intensity, in case the driver fails in time disconnected lock; The pantograph band then can take place to be carried and rushes phase-splitting; Can cause the fault of burning pantograph, burning contact system, serious in addition take place traction trip train operation accidents such as power failure.Therefore, too become the development tendency that phase-splitting is crossed in electrified railway automatically mutually.
Automatically cross the M/C that phase-splitting does not need the driver.Use at present that more automatic to cross phase-splitting be the vehicle-mounted automatic phase-splitting of crossing, its relies on the automatic operation of coke oven controller to replace driver's M/C.When locomotive got into phase-separating section, the vehicle location sensor provided position signal, and the Train Control device detects the operation of moving back level automatically, cutting out auxiliary unit, break off main circuit breaker of railway engine behind the position signal; After locomotive rolled phase-separating section away from, the vehicle location sensor provided position signal, and the Train Control device recovers aforesaid operations after detecting position signal item by item.This mode can reduce driver operation fatigue, increases system reliability.Yet vehicle-mounted automatic phase-splitting excessively also is a kind of phase-splitting of cutting off the power supply, and in phase-separating section, the locomotive outage is slided, and tractive force and train speed still can be affected.
Along with the development of China Railway High-speed and heavy haul railway, require the train also can charging operation in phase-separating section, could can not influence car speed for locomotive provides lasting tractive force like this.This mode of phase-splitting excessively is called the charged phase-splitting excessively of locomotive, and its relies on ground automatic neutral-section passing device to realize.The main actuating mechanism of ground automatic neutral-section passing device is two groups of switches, and these two groups of switches couple together the neutral zone respectively with the both sides feeding section.Do not have locomotive through out-of-date, switch breaks off, and the neutral zone does not have power supply; When locomotive got into phase-separating section, through the closed two groups of switches of priority, both sides feeding section timesharing was supplied power to the neutral zone, makes electric locomotive in the operational process of neutral zone, not break off line circuit breaker, and power-off time is very short, can not lose tractive force.
Realize the operations such as switch closure, switching, disconnection of ground automatic neutral-section passing device, it is that locomotive position signal is accurately arranged that first of system requires.If locomotive location information accurately not, the switch motion sequential will be disorderly, cause the neutral zone can not supply regular power, the motorcycle pantograph band carries and rushes phase-splitting, serious even cause traction net phase fault, has influence on the safety and driving order of traction system.
Existing locomotive position detection mode mainly is to adopt the ATP acknowledge signal of magnet steel sensor signal or Train Control device.The problem that Magnetic Sensor exists is a loss of excitation, and using for a long time to influence accuracy of detection; Magnetic Sensor can only adapt to the speed of a motor vehicle in 5 ~ 250km/h scope, can not be used for the extremely low speed of a motor vehicle and high speed railway.The ATP transponder signal is from vehicle-borne Train Control device, and the vehicle-borne system of ground automatic neutral-section passing device right and wrong, the situation of train control system and non-train control system switching signal is not suitable for multiple locomotive and mixes the circuit that runs.
In the patent No. is 92234278.4; Name is called in the patent of stringing electrical locomotive position transduser and discloses a kind of electric locomotive position transduser of being made up of electromagnet, Hall element and amplifying circuit; This invention is applicable to 250V or the galvanic situation of 550V, can not be applicable to the electrified railway of 27.5kV Alternating Current Power Supply.
Summary of the invention
Technical matters to be solved by this invention is: have electrified vehicle location sensor now and exist low, the suitable multiple locomotive of accuracy of detection to mix the circuit that runs, suitable high speed and utmost point slow-moving vehicle, the electrified railway of suitable Alternating Current Power Supply.The present invention provides a kind of electrified vehicle location sensor, the position of accurate in locating motorcycle pantograph, and can solve the problems referred to above.
Technical scheme of the present invention is: adopt a current transformer that the alternating current in the contact system is monitored; When flowing through electric current in the contact system; Current Transformer Secondary side output current signal, the inverse parallel circuit clamping through series diode obtains voltage signal, converts voltage signal into optical signal through the optical fiber emitting head again; This optical signal is exactly the locomotive position signal, is transferred to through optical cable in the controller of ground automatic neutral-section passing device.
Two exits of Current Transformer Secondary side winding (W) are connected with first, second, third branch road.
The first branch road diode in series quantity and the second branch road diode in series quantity are n, n >=2, and all diodes are selected same model for use.
First branch road is the one one diode, the one or two diode ... The series arm of the one N-1 diode, a N diode.
The negative electrode of the one one diode is connected with the anode of the one or two diode, the negative electrode of the one or two diode ... Be connected with the anode of a N-1 diode, the negative electrode of a N-1 diode is connected with the anode of a N diode.
Second branch road is the 21 diode, the two or two diode ... The series arm of the 2nd N-1 diode, the 2nd N diode.
The anode of the 21 diode is connected with the negative electrode of the two or two diode, the anode of the two or two diode ... Be connected with the negative electrode of the 2nd N-1 diode, the anode of the 2nd N-1 diode is connected with the negative electrode of the 2nd N diode.
The 3rd branch road is the branch road that an end of an end and the optical fiber emitting head of resistance is connected to form.
One end of the winding of current transformer is connected with the negative electrode of the 21 diode of the anode of the one one diode of first branch road, second branch road and the other end of resistance.
The anode of the negative electrode of the other end of the winding of current transformer and first branch road the one N diode, the 2nd N diode of second branch road and the other end of optical fiber emitting head are connected.
The present invention compares the beneficial effect that is had with prior art:
1) because what gather is change in current, rather than the numerical value of the electric current of gathering, therefore allow the iron core of current transformer to be operated in saturation conditions, the signal through optical fiber output is a dutycycle less than 50% impulse singla.The benefit of doing like this is the iron core that does not need big volume, and the current transformer equipment volume is little, cost is low.
2) utilize the characteristic of diode clamp, avoid the fluctuation of Current Transformer Secondary lateral load, when monitored electric current changed to 1000A at 0.5A, the voltage undulation scope of diode clamp was merely 0.5V.Therefore electrified vehicle location sensor can be monitored the locomotive position of all existing operations.
3) antijamming capability is strong.Current Transformer Secondary side signal is a current source signal, and signal transmission path is an Optical Fiber Transmission, and the two all can not receive the influence of electromagnetic interference.
4) use HFBR that the high pressure of contact system and the low pressure of controller are isolated, need not that current transformer is done special insulation and handle, isolation effect is good.
Description of drawings
Fig. 1 is the system schematic of ground automatic neutral-section passing device work.
Fig. 2 is the schematic circuit diagram of electrified vehicle location sensor.
Among the figure, first branch road 1; Second branch road 2; The 3rd branch road 3; Current transformer 4.
The specific embodiment
The embodiment that invention will be further ex-plained with reference to the appended drawings.
The present invention monitors the contact system electric current through operation of current transformers principle, diode clamp characteristic, the position of accurate in locating motorcycle pantograph.
Fig. 1 is the system schematic of ground automatic neutral-section passing device work; N1 and N2 are respectively the boundary of neutral zone and feeding section; It between N1 and the N2 neutral zone (non-electricity zone); That is there are not the section of electricity, the contact system of left catenary 5, left dropper 6, left side, left contact wire 7 formation neutral zones feeding section in the contact system fully.The contact system of right catenary 8, right dropper 9, right side, right contact wire 10 formation neutral zone feeding section.The contact system of middle catenary 11, middle dropper 12, middle contact wire 13 formation neutral zones.
The switch 14 of ground, left side automatic neutral-section passing device, the switch 15 of right ground automatic neutral-section passing device.One end of the switch 14 of ground, left side automatic neutral-section passing device is connected with left contact system 5 through high-tension cable 16; One end of the switch 15 of right ground automatic neutral-section passing device is connected with right contact system 8 through high-tension cable 17.High-tension cable 18 is used to connect the other end of the switch 14,15 of neutral zone contact system 11,13 and ground, left and right sides automatic neutral-section passing device.Electric locomotive is 19, and pantograph is 20, and rail is 21.CG1, CG2 are position transduser of the present invention, and Fig. 2 is the circuit diagram of electrified vehicle location sensor.
Current transformer 4 adopts the core-theaded type structure, and iron core MC adopts the structure of open-type or closed type, and the material of iron core MC is silicon steel, crystallite or permalloy.
Two exits of the secondary side winding W of current transformer 4 are connected with first, second, third branch road (1,2,3).
The negative electrode of the one one diode D11 is connected with the anode of the one or two diode D12; The negative electrode of the one or two diode D12 ... Be connected with the anode of a N-1 diode D1 (n-1), the negative electrode of a N-1 diode D1 (n-1) is connected with the anode of a N diode D1n.
Second branch road 2 is the 21 diode D21, the two or two diode D22 ... The series arm of the 2nd N-1 diode D2 (n-1), the 2nd N diode D2n.
The anode of the 21 diode D21 is connected with the negative electrode of the two or two diode D22; The anode of the two or two diode D22 ... Be connected with the negative electrode of the 2nd N-1 diode D2 (n-1), the anode of the 2nd N-1 diode D2 (n-1) is connected with the negative electrode of the 2nd N diode D2n.
The branch road that the 3rd branch road 3 is connected to form for the end of an end of resistance R and optical fiber emitting head HFBR.
The negative electrode of the one one diode D11 anode of the end of the winding W of current transformer 4 and first branch road 1, the 21 diode D421 of second branch road 2 and the other end of resistance R are connected.
The anode of the negative electrode of the other end of the winding W of current transformer 4 and a n diode D1n of first branch road 1, the 2nd n diode D2n of second branch road 2 and the other end of optical fiber emitting head HFBR are connected.
The diode of the diode of first branch road 1 and second branch road 2 is all selected same model for use.The quantity of two-way diode is n, and n >=2 say that from principle the quantity of diode does not have ceiling restriction, and operating needs is promptly satisfied in general n=3 or 4, and n=1 is nonsensical.
Principle of work of the present invention is: when locomotive crosses, have electric current to flow through in this place's contact system, also can flow through electric current in the current carrying catenary; This electric current is an alternating current, passes after the current transformer 4 of current carrying catenary monitors electric current, flows through a little electric current among the secondary side winding W; The electric current of positive and negative half cycle flows through first branch road 1 and second branch road 2 respectively; The diode two ends produce clamping voltage, and this voltage is added on the 3rd branch road 3, through the resistance R current limliting; Optical fiber emitting head HFBR flows through electric current, thus the output optical signal.Transfer to controller through optical cable, after process opto-electronic conversion on the controller, know the electric signal of locomotive position.
When motorcycle pantograph is between sensor CG1 of the present invention and N1, CG1 outgoing position signal high level, otherwise output low level; When motorcycle pantograph is between CG2 and N2, CG2 outgoing position signal, otherwise output low level.
When the outside of locomotive at CG1 and CG2 two ends, CG1 and CG2 be output low level, and the switch 14 and 15 of left and right ground automatic neutral-section passing device all breaks off, and this is the initial condition of ground automatic neutral-section passing device.In Fig. 1, operate to example from left to right with locomotive, when pantograph process CG1, CG1 exports high level, after controller receives position signal, sends the switch 14 of the closed left ground of instruction automatic neutral-section passing device, and the neutral zone is supplied power by the left side feeding section.After locomotive gets into the neutral zone through N1 to overtake; The position signal of CG1 disappears; Controller sends the switch 14 that left and right ground automatic neutral-section passing device is broken off in instruction; 3.3 changing by the right side feeding section, the switch 15 of ~ 20ms (concrete time numerical value need be confirmed according to the voltage-phase of left and right two phases) closed left and right ground, back automatic neutral-section passing device, neutral zone supply power.Locomotive rolls the neutral zone away to overtake, gets between N2 and the CG2; Then CG2 exports the high level position signal, when locomotive sails to the CG2 right side, and the CG2 output low level; Controller receives after the CG2 signal arrives low process from low to high again, sends instruction cut-off switch 15, and initial condition is got back to by system.
Claims (2)
1. electrified railway vehicle location sensor is characterized in that:
Two exits of secondary side winding (W) of current transformer (4) are connected with first, second, third branch road (1,2,3) respectively;
The number of diodes of the number of diodes of first branch road (1) and second branch road (2) is n, n=3 or 4;
When n=3; First branch road (1) is the series arm of the one one diode (D11), the one or two diode (D12), the one or three diode (D13); The negative electrode of the one one diode (D11) is connected with the anode of the one or two diode (D12), and the negative electrode of the one or two diode (D12) is connected with the anode of the one or three diode (D13);
When n=4; First branch road (1) is the series arm of the one one diode (D11), the one or two diode (D12), the one or three diode (D13), the one or four diode (D14); The negative electrode of the one one diode (D11) is connected with the anode of the one or two diode (D12); The negative electrode of the one or two diode (D12) is connected with the anode of the one or three diode (D13), the negative electrode of the one or three diode (D13) and the one or four diode (D14)) anode be connected;
When n=3; Second branch road (2) is the series arm of the 21 diode (D21), the two or two diode (D22), the two or three diode (D23); The anode of the 21 diode (D21) is connected with the negative electrode of the two or two diode (D22), and the anode of the two or two diode (D22) is connected with the negative electrode of the two or three diode (D23);
When n=4; Second branch road (2) is the series arm of the 21 diode (D21), the two or two diode (D22), the two or three diode (D23), the two or four diode (D24); The anode of the 21 diode (D21) is connected with the negative electrode of the two or two diode (D22); The anode of the two or two diode (D22) is connected with the negative electrode of the two or three diode (D23), the anode of the two or three diode (D23) and the two or four diode (D24)) negative electrode be connected;
The branch road that the 3rd branch road (3) is connected to form for an end of an end of resistance (R) and optical fiber emitting head (HFBR);
One end of the secondary side winding (W) of current transformer (4) is connected with the negative electrode of the 21 diode (D21) of the anode of the one one diode (D11) of first branch road (1), second branch road (2) and the other end of resistance (R);
When n=3, the other end of the secondary side winding (W) of current transformer (4) is connected with the anode of the two or three diode (D23) of the negative electrode of the one or three diode (D13) of first branch road (1), second branch road (2) and the other end of optical fiber emitting head (HFBR);
When n=4, the other end of the secondary side winding (W) of current transformer (4) is connected with the anode of the two or four diode (D24) of the negative electrode of the one or four diode (D14) of first branch road (1), second branch road (2) and the other end of optical fiber emitting head (HFBR).
2. electrified railway vehicle location sensor according to claim 1 is characterized in that: described current transformer (4) adopts the core-theaded type structure, and the material of iron core is silicon steel, crystallite or permalloy.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102954336A CN101934745B (en) | 2010-09-29 | 2010-09-29 | Position sensor for electrified railway vehicles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102954336A CN101934745B (en) | 2010-09-29 | 2010-09-29 | Position sensor for electrified railway vehicles |
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| CN101934745A CN101934745A (en) | 2011-01-05 |
| CN101934745B true CN101934745B (en) | 2012-06-27 |
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| CN2010102954336A Expired - Fee Related CN101934745B (en) | 2010-09-29 | 2010-09-29 | Position sensor for electrified railway vehicles |
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| CN108621865B (en) * | 2017-12-28 | 2019-09-06 | 株洲变流技术国家工程研究中心有限公司 | Floor switches cross split-phase bow net arc suppression method, inhibit device and passing phase insulator device |
| CN110095675B (en) * | 2018-01-31 | 2023-08-04 | 株洲中车时代电气股份有限公司 | Three-fracture split-phase train current detection method and device |
| CN110095057A (en) * | 2018-01-31 | 2019-08-06 | 株洲中车时代电气股份有限公司 | A kind of train pantograph method for detecting position, device, excessive phase method and system |
| CN108490292B (en) * | 2018-03-21 | 2020-08-18 | 中铁第四勘察设计院集团有限公司 | Train running section online monitoring method and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2139263Y (en) * | 1992-10-07 | 1993-07-28 | 杨文传 | Position sensor for stringing electric locomotive |
| CN2142191Y (en) * | 1992-11-03 | 1993-09-15 | 杨文传 | Magnetic control sensor for measuring position |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008018831A (en) * | 2006-07-12 | 2008-01-31 | Akebono Brake Ind Co Ltd | Pantograph position detection device and pantograph position detection method |
| JP5416910B2 (en) * | 2008-03-17 | 2014-02-12 | 公益財団法人鉄道総合技術研究所 | Method and apparatus for calculating current passing through parallel connection point of different power sources |
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2010
- 2010-09-29 CN CN2010102954336A patent/CN101934745B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2139263Y (en) * | 1992-10-07 | 1993-07-28 | 杨文传 | Position sensor for stringing electric locomotive |
| CN2142191Y (en) * | 1992-11-03 | 1993-09-15 | 杨文传 | Magnetic control sensor for measuring position |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2008-18831A 2008.01.31 |
| JP特开2009-220706A 2009.10.01 |
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