CN104276056A - Neutral-section passing system - Google Patents
Neutral-section passing system Download PDFInfo
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- CN104276056A CN104276056A CN201410489790.4A CN201410489790A CN104276056A CN 104276056 A CN104276056 A CN 104276056A CN 201410489790 A CN201410489790 A CN 201410489790A CN 104276056 A CN104276056 A CN 104276056A
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Abstract
The invention relates to a neutral-section passing system. The neutral-section passing system comprises a permanent magnetic mechanism switch, a neutral-section passing controller and a permanent magnetic mechanism controller. The neutral-section passing controller is used for judging to generate switch-on and switch-off instructions, and the permanent magnetic mechanism controller is used for calculating switch-on and switch-off actuation time. The neutral-section passing controller is connected with the permanent magnetic mechanism controller, and the permanent magnetic mechanism controller is connected with the permanent magnetic mechanism switch. The permanent magnetic mechanism controller comprises a sampling module and an IGBT (insulated gate bipolar transistor) drive module. The sampling module sequentially comprises an acquisition circuit, a rectifying circuit and a zero passage and frequency detection circuit which are connected sequentially. The zero passage and frequency detection circuit comprises a comparator and an isolation drive circuit. The output end of the rectifying circuit is connected with the input end of the comparator. The output end of the comparator is connected with the input end of the isolation drive circuit. The output end of the isolation drive circuit is connected with the output end of the sampling module. The IGBT drive module comprises a switch-on and switch-off coil drive loop and an automatic coil wire breakage detection loop.
Description
Technical field
The present invention relates to neutral-section passing system, belong to contact nets in electrified railways automatic passing over of neutral section technical field.
Background technology
It is manual switchover on car that phase-splitting is crossed in traditional electric locomotive, so not only expends driver's energy, increases labour intensity, and totally unfavorable to safe in operation, and driver slightly neglects misoperation, and electric arc will be drawn to burn electric arc shackle.Along with the fast development of railway electrification and the speed-raising of electric locomotive, locomotive is per hour will cross tens electric phase-splittings, driver operation difficulty, at high slope heavy duty section, the undue phase time train of power-off significantly slows down, and high hillside fields section plays speed difficulty, the motion time of throat section can be extended, reduce circuit capacity.For solving above outstanding problem, automatic passing over of neutral section oneself become one of gordian technique of China railways speed-raising and Developing High-speed electrified railway.
Only have a few countries research at present in the world and adopt automatic neutral-section passing device, technical scheme has three types substantially: automatic switching mode on floor switches automatic switchover, on-pole switch automatic switchover, car.These three kinds of automatic passing over of neutral section schemes are all the commutation switching action automatically carrying out power circuit under the effect of control setup, although overcome the deficiency of manual switchover mode, also bring new problem: suitable voltage-phase can not be selected to carry out automatic passing over of neutral section; And producing excess current and over voltage during locomotive phase splitting folding split-phase switch, this can cause transient state to impact to equipment of itself and electrical network, and over voltage and shoving understands the electric life of the split-phase switch that cause damage to Switch main body and circuit, reduce.
Application number 2010101904185, the documents that denomination of invention is " a kind of novel ground method for controlling passing neutral section and device " discloses a kind of novel ground method for controlling passing neutral section and device, according to arrange locomotive posit ion transducer in orbit and for measure contact system voltage-phase contact system voltage detection module to the determination of contact system voltage-phase, control all-controlling power electronics device with controller and form cut-offfing of binistor and realize electric locomotive ground and switch phase splitting without impact; Although this documents is in zero crossing automatic passing over of neutral section, avoid over voltage and shove, but this documents just carries out collection line voltage after receiving track signal and divide-shut brake instruction, the process gathered needs certain hour and may break down in treating process, this just may cause can not wanting to carry out breaking-closing operating in seeking time, so reliability is lower.
Summary of the invention
The object of this invention is to provide neutral-section passing system, the problem that phase-splitting reliability is lower must not be caused by continuous collecting line voltage in order to solution.
For achieving the above object, the solution of the present invention comprises: neutral-section passing system, comprising: permanent magnetic mechanism switch, for judging the individual-phase control device excessively producing divide-shut brake instruction, and for calculating the permanent magnet mechanism controller of divide-shut brake opening time; Cross individual-phase control device and connect permanent magnet mechanism controller, permanent magnet mechanism controller control linkage permanent magnetic mechanism switch; Permanent magnet mechanism controller comprises sampling module and IGBT drive module.
Sampling module comprises the Acquisition Circuit, rectifying circuit, the mistake zero-sum frequency detection circuit that connect successively; Cross zero-sum frequency detection circuit to comprise: comparator and isolated drive circuit; Rectification circuit output end connects the input end of comparator, and the mouth of comparator connects input end, the mouth of isolated drive circuit and the mouth of sampling module of isolated drive circuit.
IGBT drive module comprises divide-shut brake coil driving circuits and coil breakage self-inspection loop.
Comparator has two input ends, the mouth of an input termination rectifying circuit; Another input termination VREF (Voltage Reference).
Comparator output terminal connects the input end of the optic coupling element of isolated drive circuit.
Filter circuit is connected with between Acquisition Circuit and rectifying circuit.
Rail is provided with axle count sensor, and the connection of note axle sensor signal output part is described crosses individual-phase control device.
Permanent magnetic mechanism switch is made up of IGBT, and permanent magnet mechanism controller trigging control connects described IGBT.
Coil breakage self-inspection loop comprises the alarm contact of coil breakage alarm loop and IGBT circuit.
Employing of the present invention be a kind of circuit structure of continuous collecting voltage, comparator in zero-sum frequency detection circuit and isolated drive circuit was inputed to by steps such as collection, filtering, rectifications, divide-shut brake opening time can be directly doped at any time according to electrical network phase selection voltage, like this when divide-shut brake instruction arrives, divide-shut brake opening time can be provided rapidly, stability and reliability higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of neutral-section passing system specific embodiment;
Fig. 2 is that the one that embodiment provides crosses zero-sum frequency detection circuit schematic diagram;
Fig. 3 is that IGBT drives sub-switch circuit;
Fig. 4 is phase-controlled schematic flow sheet.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
The present invention relates to neutral-section passing system, comprising: permanent magnetic mechanism switch, for judging the individual-phase control device excessively producing divide-shut brake instruction, and for calculating the permanent magnet mechanism controller of divide-shut brake opening time; Cross individual-phase control device and connect permanent magnet mechanism controller, permanent magnet mechanism controller control linkage permanent magnetic mechanism switch; Permanent magnet mechanism controller comprises sampling module and IGBT drive module, and sampling module comprises the Acquisition Circuit, rectifying circuit, the mistake zero-sum frequency detection circuit that connect successively, crosses zero-sum frequency detection circuit and comprises: comparator and isolated drive circuit.IGBT drive module comprises divide-shut brake coil driving circuits and coil breakage self-inspection loop.
Rectification circuit output end connects the input end of comparator, and the mouth of comparator connects input end, the mouth of isolated drive circuit and the mouth of sampling module of isolated drive circuit.
For convenience of description, the permanent magnet mechanism controller in the present invention selects a kind of intelligent phase selection unicoil permanent magnetic actuator controller to be detailed description of the invention.
Figure 1 shows that the structural representation of neutral-section passing system, the present invention is applied in electrified railway system, and on rail, axle count sensor is equipped with at J1, J2, J3 place.For the axle count sensor at J3 place, when train is come, the axle count sensor at J3 place produces axle-counting signal and gave individual-phase control device, crosses individual-phase control device and judges to produce divide-shut brake instruction according to axle-counting signal.
Acquisition Circuit in the sampling module of intelligent phase selection unicoil permanent magnetic actuator controller gathered the control combined floodgate far away order of individual-phase control device, control separating brake order far away and electrical network phase selection voltage, in order to filtering high-order interfering signal, can first after a filter circuit filtering again through the ac-dc conversion of rectifying circuit, inputed to zero-sum frequency detection circuit.
Fig. 2 is that in sampling module, one crosses zero-sum frequency detection circuit schematic diagram, phase selection voltage after rectification sent into the comparator in zero-sum frequency detection circuit, export to isolation drive again, export after the optic coupling element of isolation drive, just can obtain that dutycycle is 50%, frequency is the square-wave signal of 50Hz.
The comparator crossed in zero-sum frequency detection circuit take VREF (Voltage Reference) as benchmark, if VREF (Voltage Reference) ground connection, when namely VREF (Voltage Reference) is zero, comparator is now a zero-crossing comparator.Input end connects rectification and exports, export and connect isolated drive circuit, as shown in Figure 2, U1 is an optic coupling element, optic coupling element exports just can obtain that dutycycle is 50%, frequency is the square-wave signal of 50Hz, the positive rise of square-wave signal and falling edge are the zero crossings of alternating-current voltage/AC voltage, also can calculate zero-acrross ing moment many times.When VREF (Voltage Reference) is non-vanishing, be the magnitude of voltage of a setting, at this moment comparator is not just a zero-crossing comparator, and the positive rise of the square-wave signal that optocoupler exports and falling edge neither zero crossings.So this sampling module can select suitable voltage-phase to carry out phase-splitting as required.
Fig. 3 is that IGBT drives sub-switch circuit, and when permanent magnet mechanism controller CPU sends combined floodgate order, IGBT driving chip drives IGBT conducting, and make IGBT-A and IGBT-D conducting simultaneously, carry out closing operation, IGBT-A ' and IGBT-B ' is divide-shut brake coil interface; Same when CPU sends separating brake order, IGBT driving chip drives IGBT conducting, makes IGBT-B and IGBT-C conducting simultaneously, carries out sub-switching operation, has carried out the design of coil breakage warning circuit and the design of IGBT alarm contact simultaneously.For self-inspection and judge permanent magnet mechanism controller connect permanent magnetic mechanism switch coil and whether break.
The present invention can select suitable voltage-phase to carry out automatic passing over of neutral section, for convenience of description, carries out automatic passing over of neutral section as detailed description of the invention here using voltage-phase zero-acrross ing moment, but the present invention is not limited to voltage-phase zero-acrross ing moment carries out automatic passing over of neutral section.
After sampling module calculates phase selection electric voltage frequency, cycle, each zero-acrross ing moment, just can calculate divide-shut brake opening time.Divide-shut brake opening time then, intelligent phase selection unicoil permanent magnetic actuator controller sends trigger command to permanent magnetic mechanism switch, make the IGBT conducting in permanent magnetic mechanism switch, coil in permanent magnetic mechanism switch passes into counter-current and carries out sub-switching operation, pass into forward current and carry out closing operation, this completes the switching of automatic passing over of neutral section on-off system, thus ensure that electric locomotive passed through phase separation point and reliability service smoothly.
Very short owing to crossing phase-separating section distance, the time that electric locomotive is needed by this distance is also very short, in order to the time preventing this of short duration does not find suitable voltage-phase to carry out divide-shut brake, one phase selection time was set: if still do not find suitable voltage-phase moment to complete divide-shut brake action within the phase selection time, then when the phase selection time arrives, directly make the IGBT conducting in permanent magnetic mechanism switch, carry out breaking-closing operating.Even if do not find the voltage-phase moment that one suitable within the phase selection time, the action message of permanent magnetic mechanism switch also can be ensured.This completes the switching of automatic passing over of neutral section, make electric locomotive pass through phase separation point smoothly.
Fig. 4 is phase-controlled schematic flow sheet, first the frequency of phase selection voltage, cycle and zero-acrross ing moment can be calculated by sampling module, draw above parameter, according to the phase time of specifying, namely selected suitable voltage-phase just can go out divide-shut brake opening time by computational prediction in real time, carries out this always and circulate in this neutral-section passing system.When there being divide-shut brake order, choose the divide-shut brake opening time that now computational prediction goes out, if can option principle be carried out within the fixing phase selection time, then phase selection success; If exceed the phase selection time, still do not find suitable voltage-phase to drive moment, then Direct driver IGBT conducting, carry out breaking-closing operating, drive the moment even if do not find within the phase selection time, can ensure the action message of permanent magnetic mechanism switch yet.
Intelligent phase selection unicoil permanent magnetic actuator controller can also check the CPU information that controller is sent up and software version number and CRC check code by USB configuration tool, display protection point information, and can carry out fixed value modification solidification etc.Sampling channel can show the ac and dc current magnitude of voltage of collection in real time, and can ensure the sampling precision requirement to exchanging value by amendment drift and coefficient.Can be carried out the download solidification of director demon by USB interface, upgrading upgrades, and can throw the supervision of moving back to some input and outputs, unicoil permanent magnetic actuator controller has comparatively high-intelligentization level in conjunction with USB configuration tool simultaneously.
Be presented above concrete embodiment, but the present invention is not limited to described embodiment.Basic ideas of the present invention are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present invention, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out embodiment without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.
Claims (7)
1. neutral-section passing system, comprising: permanent magnetic mechanism switch, for judging the individual-phase control device excessively producing divide-shut brake instruction, and for calculating the permanent magnet mechanism controller of divide-shut brake opening time; Cross individual-phase control device and connect permanent magnet mechanism controller, permanent magnet mechanism controller control linkage permanent magnetic mechanism switch; Permanent magnet mechanism controller comprises sampling module and IGBT drive module, it is characterized in that,
Described sampling module comprises the Acquisition Circuit, rectifying circuit, the mistake zero-sum frequency detection circuit that connect successively;
Described zero-sum frequency detection circuit of crossing comprises: comparator and isolated drive circuit;
Described rectification circuit output end connects the input end of comparator, and the mouth of comparator connects the input end of isolated drive circuit, the mouth of isolated drive circuit and the mouth of sampling module;
Described IGBT drive module comprises divide-shut brake coil driving circuits and coil breakage self-inspection loop.
2. neutral-section passing system according to claim 1, is characterized in that, described comparator has two input ends, the mouth of an input termination rectifying circuit; Another input termination VREF (Voltage Reference).
3. neutral-section passing system according to claim 2, is characterized in that, described comparator output terminal connects the input end of the optic coupling element of isolated drive circuit.
4. neutral-section passing system according to claim 3, is characterized in that, is connected with filter circuit between described Acquisition Circuit and rectifying circuit.
5. neutral-section passing system according to claim 3, is characterized in that, rail is provided with axle count sensor, and the connection of note axle sensor signal output part is described crosses individual-phase control device.
6. neutral-section passing system according to claim 3, is characterized in that, permanent magnetic mechanism switch is made up of IGBT, and permanent magnet mechanism controller trigging control connects described IGBT.
7. neutral-section passing system according to claim 1, is characterized in that, described coil breakage self-inspection loop comprises the alarm contact of coil breakage alarm loop and IGBT circuit.
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| CN201410489790.4A CN104276056A (en) | 2014-09-23 | 2014-09-23 | Neutral-section passing system |
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| CN201410489790.4A CN104276056A (en) | 2014-09-23 | 2014-09-23 | Neutral-section passing system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105702532A (en) * | 2015-12-28 | 2016-06-22 | 江苏亚开电气有限公司 | Permanent magnet switch coil drive circuit |
| CN108919781A (en) * | 2018-07-12 | 2018-11-30 | 沈阳铁路信号有限责任公司 | The self checking method and realization circuit of EMU auto-passing neutral section control system |
| CN109975601A (en) * | 2019-04-29 | 2019-07-05 | 广东铁峰信息技术有限公司 | For crossing the signal conditioning circuit of individual-phase control device |
| CN112537230A (en) * | 2020-12-23 | 2021-03-23 | 西南交通大学 | Ground phase selection control passing neutral section system and method for electrified rail transit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109975601A (en) * | 2019-04-29 | 2019-07-05 | 广东铁峰信息技术有限公司 | For crossing the signal conditioning circuit of individual-phase control device |
| CN112537230A (en) * | 2020-12-23 | 2021-03-23 | 西南交通大学 | Ground phase selection control passing neutral section system and method for electrified rail transit |
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Application publication date: 20150114 |