CN102765333A - Damping type automatic -passing phase separation switching device for electrified railways - Google Patents
Damping type automatic -passing phase separation switching device for electrified railways Download PDFInfo
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- CN102765333A CN102765333A CN2012102770134A CN201210277013A CN102765333A CN 102765333 A CN102765333 A CN 102765333A CN 2012102770134 A CN2012102770134 A CN 2012102770134A CN 201210277013 A CN201210277013 A CN 201210277013A CN 102765333 A CN102765333 A CN 102765333A
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Abstract
The invention discloses a damping type automatic -passing phase separation switching device for electrified railways. A gap (S1) between a neutral section and a first contact net (A) is in bridge joint with a first high-voltage switch (K1) of a first current transformer (H1); the neutral section is provided with an insulating sectioned gap (SR) which is in bridge joint with a resistor (R); a gap (S2) between the neutral section and a second contact net (B) is in bridge joint with a second current transformer (H2); and an output end of the first current transformer (H1), an output end of the second current transformer (H2) and a control end of the first high-voltage switch (K1) are all connected with a measuring and control unit. Transient overvoltage and overcurrent possibly caused by frequent switching of the high-voltage switch can be better avoided by the damping type automatic -passing phase separation switching device, automatic-passing phase separation of a train can be safely and reliably realized, and operating cost and maintenance cost of the train are saved.
Description
Technical field
The present invention relates to a kind of electric railway damping type automatic switchover passing phase insulator device.
Background technology
The countries in the world electric railway generally adopts single phase industrial frequency AC system; For avoiding in electrical network, causing too much negative-sequence current; Electric railway often adopts the scheme of phase sequence, phase-splitting switched-mode power supply by turns; Every along the railway 20-25km constitutes a service area, and each service area is respectively by the not cophase supply in the electrical network.The mode of this commutation in turn, switched-mode power supply has formed a unique texture-electric phase-splitting of electrified railway traction power supply system.Because the phase place at electric phase-splitting two ends is different or consider to adopt insulation system from safety and maintenance, so the phase resolver that insulate is also claimed in electric phase-splitting.The operational process that train carries out the transition to another service area from a service area is called train and crosses phase-splitting.Because train speed raising, it is frequent further to cross phase-splitting, and the train operator must accomplish the phase-splitting operation at the utmost point in the short time, and labour intensity is very big, on high speed railway, crosses phase-splitting and almost can't manually be accomplished by the driver especially, must adopt the automatic phase-splitting technology of crossing.Train is smooth crosses phase-splitting in order to make, and people have proposed the multiple phase-splitting solution of crossing, and can be divided into generally that vehicle-mounted and ground are automatic crosses two types of phase-splittings.
Vehicle-mountedly cross phase-splitting and be automatically: through cooperating of train and ground signal, accomplished phase-splitting automatically through train control system ON TRAINS, promptly sail neutral section into from a service area before, disconnected automatically auxiliary circuit, line circuit breaker (vac switch) breaks; After sailing another service area into through neutral section, close line circuit breaker automatically, close sequence of operations process such as auxiliary circuit.This phase-splitting mode of crossing needs outage when crossing neutral section, train leans on inertia through neutral section, can cause the certain speed loss.
Existing ground is automatic, and to cross phase-splitting then be to cooperate with the train position signal through ground high pressure (vacuum) switch, the last service area of disconnection earlier, and then with next service area's connection; Promptly switch on the neutral section through service area's power supply of high-voltage switch gear with two ends; When train passes through neutral section, carry out the back brake operation of two service areas, need outage at the part time of crossing neutral section; Power-off time is short, and is less to the train speed influence.
Cross phase-splitting no matter vehicle-mounted or ground is automatic, all exist high-voltage switch gear to switch and the electric process of transient state through neutral section, even cause the over voltage and the excess current of tractive power supply system, influence equipment safety operation.
The contriver had once invented a kind of electric railway switch-free switching auto-passing neutral section device; Its core concept is a resistors in series between the neutral section of contact system; No longer be provided with and switch high-voltage switch gear (circuit breaker), transient overvoltage that possibly cause in service and excess current are played shock damping action, introduced middle transition transformation process; The transient voltage rangeability is little, has slackened the direct transient overvoltage phenomenon that phase-splitting produces of crossing.But train reduction of speed not almost when the resistor still has transient voltage to produce, and the arcing phenomenon possibly take place, and influences the life-span of equipment when crossing resistor.
Summary of the invention
The object of the invention just provides a kind of electric railway damping type automatic switchover passing phase insulator device; Transient overvoltage and excess current that this device can avoid the frequent switching of high-voltage switch gear to cause better; The realization train safe is automatic reliably crosses phase-splitting, and practices thrift the operating cost and the maintenance cost of train.
The present invention solves its technical matters, and the technical scheme that is adopted is: a kind of electric railway damping type automatic switchover passing phase insulator device, and its composition is:
The high-voltage switch gear one of neutral section and the gap cross-over connection belt current transformer one of contact system one; Neutral section is provided with the insulation overlap span, this insulation overlap span cross-over connection resistor; The gap cross-over connection current transformer two of neutral section and contact system two;
The control end of the mouth of the mouth of current transformer one, current transformer two and high-voltage switch gear one all links to each other with measurement and control unit.
Above technical scheme is applicable to the train folk prescription to the situation through (like the upstream or downstream of double-tracking railways), and its working process and principle are:
The inundue phase time of train, high-voltage switch gear one is in normally off, and the difference between currents that current transformer one, two is measured is zero.Suppose that train sails from the direction of contact system one; The electric current that the electric current that makes current transformer one measure behind the gap through contact system one and neutral section is measured greater than current transformer two; Measurement and control unit control high-voltage switch gear one break off at once; Train stops to get stream from contact system one, and speed is able to suitable reduction.Train crosses resistor (insulation overlap span) back immediately changes by contact system two power supplies; At this moment, the electric current that the electric current that current transformer two is measured is measured greater than current transformer one is measured and control unit control high-voltage switch gear K1 closure; Perhaps, after postponing through time of setting (greater than the time of train, but less than minimum running interval), measure and control unit control connection high-voltage switch gear one, got into the supply regular power state after the phase-splitting through electric phase-splitting.
Compared with prior art, the invention has the beneficial effects as follows:
One, the present invention utilizes the damping force characteristics of resistor, suppresses the adverse effect that high-voltage switch gear switches issuable transient overvoltage and excess current and the tractive power supply system electrical equipment is caused, raising power supply reliability and safety.
Two, only need a high-voltage switch gear at undue phase time, the quantity of the high-voltage switch gear of automatic neutral-section passing device reduces half than existing ground, and action frequency also reduces half the, and transient process reduces half the influence to train operation and reduces; And cancelled ground signal and sensing device thereof, avoided the interference of ground staff and equipment room, reduced investment and maintenance cost, and improved reliability.
Three, compare with existing electric railway damping switch-free switching auto-passing neutral section device; Because the power supply of before train crosses resistor, having broken off train by high-voltage switch gear one; Train speed is able to suitable reduction, through the time proper extension of resistor, can avoid train to produce moment pressure reduction and the phenomenon of arcing at a high speed when the resistor; Guarantee the safe operation of train better, improved the reliability and the life-span of device.
Above-mentioned neutral section and the gap cross-over connection high-voltage switch gear two of contact system two, the current transformer that described current transformer two carries for high-voltage switch gear two.
Such scheme is applicable to the two-way situation through railway of train, and its working process and principle are:
The inundue phase time of train, high-voltage switch gear one, two is in normally off, and the difference between currents that current transformer one, two is measured is zero.
When train is sailed from the direction of contact system one; The electric current that the electric current that makes current transformer one measure behind the gap through contact system one and neutral section is measured greater than current transformer two; Measurement and control unit control high-voltage switch gear one break off at once; Train stops power taking from the contact system one, and speed is able to suitable reduction.Train crosses resistor (insulation overlap span) back immediately changes by contact system two power supplies; At this moment, the electric current that the electric current that current transformer two is measured is measured greater than current transformer one is measured and control unit control high-voltage switch gear one closure; Perhaps, after postponing through time of setting (greater than the time of train, but less than minimum running interval), measure and control unit control connection high-voltage switch gear one, got into the supply regular power state after the phase-splitting through electric phase-splitting.
When train is sailed from the direction of contact system two; The electric current that the electric current that makes current transformer two measure behind the gap through contact system two and neutral section is measured greater than current transformer one; Measurement and control unit control high-voltage switch gear two break off at once; Train stops power taking from the contact system two, and speed is able to suitable reduction.Train crosses resistor immediately, changes after the insulation overlap span by contact system one power supply; At this moment, the electric current that the electric current that current transformer one is measured is measured greater than current transformer two is measured and control unit control high-voltage switch gear two closures; Perhaps, after postponing through time of setting (greater than the time of train, but less than minimum running interval), measure and control unit control connection high-voltage switch gear two, got into the supply regular power state after the phase-splitting through electric phase-splitting.
Thus it is clear that,, only need one action of a high-voltage switch gear, and high-voltage switch gear two keeps normally closed, is failure to actuate in undue this scheme of phase time; The high-voltage switch gear action frequency of automatic neutral-section passing device reduces half than existing ground, and long service life prolongs one times; Also cancelled ground signal and sensing device thereof, avoided the interference of ground staff and equipment room, reduced investment and maintenance cost, and improved reliability.And compare with existing electric railway damping switch-free switching auto-passing neutral section device: because the power supply of before train crosses resistor, having broken off train by high-voltage switch gear one or two; Train speed is able to suitable reduction; Time proper extension through resistor; Can avoid train to produce moment pressure reduction and the phenomenon of arcing has also guaranteed the safe operation of train better at a high speed when the resistor, improve the reliability and the life-span of device.
It is two that above-mentioned neutral section goes up the insulation overlap span that is provided with, the equal cross-over connection resistor of each insulation overlap span.
Like this, can improve the anti-short-circuit capacity of apparatus of the present invention.
The across of above-mentioned resistor has by-pass switch.
Like this, when train has sailed neutral section into but do not passed through resistor, the parking phenomenon takes place, since very short apart from the resistor distance, supply power through recovering the rear contact system, and train can't obtain enough energy and pass through resistor smoothly; Connect by-pass switch this moment, can bypass resistor, by the contact system in the place ahead through closed high-voltage switch gear one or two, by-pass switch to train power supply, make it roll the power supply dead band smoothly away from, got into the supply regular power state after the phase-splitting.
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is made further detailed description.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one.
Fig. 2 is the structural representation of the embodiment of the invention two.
Fig. 3 is the structural representation of the embodiment of the invention three.
The specific embodiment
Embodiment one
Fig. 1 illustrates, and a kind of specific embodiment of the present invention is: a kind of electric railway damping type automatic switchover passing phase insulator device, and its composition is:
High-voltage switch gear one K1 of neutral section and gap S1 cross-over connection belt current transformer one H1 of contact system one A; Neutral section is provided with insulation overlap span SR, this insulation overlap span SR cross-over connection resistor R; Gap S2 cross-over connection current transformer two H2 of neutral section and contact system two B;
The control end of the mouth of the mouth of current transformer one H1, current transformer two H2 and high-voltage switch gear one K1 all links to each other with measurement and control unit.
The across of resistor R has by-pass switch P in this example.
Present embodiment be applicable to train L from contact system one A to contact system two B folk prescriptions to the situation of passing through (like the upstream or downstream of double-tracking railways).
Embodiment two
Fig. 2 illustrates, and structure that this is routine and embodiment one are basic identical, and different only is: gap S2 cross-over connection high-voltage switch gear two K2 of neutral section and contact system two B, current transformer two H2 are the current transformer that high-voltage switch gear two K2 carry.
This example is applicable to the two-way situation through single track railway of train L.
Embodiment three
Fig. 3 illustrates, and structure that this is routine and embodiment two are basic identical, and different only is: it is two that described neutral section goes up the insulation overlap span SR that is provided with, the equal cross-over connection resistor R of each insulation overlap span SR.
The rated voltage of high-voltage switch gear one K1 of the present invention, high-voltage switch gear two K2 is 27.5kV, and rated current is the train rated current; The resistor R rated voltage is 27.5kV, and the resistance of resistor R is got 10-505k Ω usually, and concrete value is by its shock damping action and minimal losses decision; As choose under the corresponding voltage resistance of 1 Ampere currents: when the out-phase electricity branch that is used for the traction substation outlet was got along, the rated voltage of electric phase-splitting was 27.5kV; Then the resistor R resistance is got 27.5k Ω; When being used for the section post of homophase electricity phase-splitting, because pressure reduction is less than 10kV usually, then the resistor R resistance can be 10k Ω.Among Fig. 3, L is a train.
High-voltage switch gear of the present invention promptly can be a vac switch, also electronic power switch.
Claims (4)
1. electric railway damping type automatic switchover passing phase insulator device, its composition is:
The high-voltage switch gear one (K1) of neutral section and gap (S1) the cross-over connection belt current transformer one (H1) of contact system one (A); Neutral section is provided with insulation overlap span (SR), this overlap span (SR) cross-over connection resistor (R) that insulate; Gap (S2) cross-over connection current transformer two (H2) of neutral section and contact system two (B);
The control end of the mouth of the mouth of current transformer one (H1), current transformer two (H2) and high-voltage switch gear one (K1) all links to each other with measurement and control unit.
2. a kind of electric railway damping type automatic switchover passing phase insulator device according to claim 1; It is characterized in that: gap (S2) cross-over connection high-voltage switch gear two (K2) of described neutral section and contact system two (B), the current transformer that described current transformer two (H2) carries for high-voltage switch gear two (K2).
3. a kind of electric railway damping type automatic switchover passing phase insulator device according to claim 1 is characterized in that: it is two that described neutral section goes up the insulation overlap span (SR) that is provided with, and each insulation overlap span (SR) is cross-over connection resistor (R) all.
4. according to claim 1 or 3 described a kind of electric railway damping type automatic switchover passing phase insulator devices, it is characterized in that: the across of described resistor (R) has by-pass switch (P).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210277013.4A CN102765333B (en) | 2012-08-06 | 2012-08-06 | A kind of electric railway damping type automatic switchover passing phase insulator device |
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| CN201210277013.4A CN102765333B (en) | 2012-08-06 | 2012-08-06 | A kind of electric railway damping type automatic switchover passing phase insulator device |
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| CN102765333B CN102765333B (en) | 2015-12-09 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103057439A (en) * | 2012-12-06 | 2013-04-24 | 西南交通大学 | Automatic switching passing neutral section system of electrified railway star damping switch |
| CN103625309A (en) * | 2013-11-05 | 2014-03-12 | 西南交通大学 | Automatic passing phase-separation system and method of electrified railway |
| CN104477055A (en) * | 2014-11-25 | 2015-04-01 | 南车青岛四方机车车辆股份有限公司 | Passing neutral section operating system for train |
| CN106183897A (en) * | 2016-09-23 | 2016-12-07 | 西南交通大学 | A kind of electric railway subregion institute's automatic neutral-section passing system and control method thereof |
| CN113771700A (en) * | 2021-08-04 | 2021-12-10 | 中铁电气化勘测设计研究院有限公司 | Electric phase splitting equipment for long-distance rail transit high-speed overhead rigid contact network |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103057439A (en) * | 2012-12-06 | 2013-04-24 | 西南交通大学 | Automatic switching passing neutral section system of electrified railway star damping switch |
| CN103057439B (en) * | 2012-12-06 | 2015-04-22 | 西南交通大学 | Automatic switching passing neutral section system of electrified railway star damping switch |
| CN103625309A (en) * | 2013-11-05 | 2014-03-12 | 西南交通大学 | Automatic passing phase-separation system and method of electrified railway |
| CN103625309B (en) * | 2013-11-05 | 2016-02-03 | 西南交通大学 | A kind of electric railway automatic neutral-section passing system and automatic passing over of neutral section method thereof |
| CN104477055A (en) * | 2014-11-25 | 2015-04-01 | 南车青岛四方机车车辆股份有限公司 | Passing neutral section operating system for train |
| CN106183897A (en) * | 2016-09-23 | 2016-12-07 | 西南交通大学 | A kind of electric railway subregion institute's automatic neutral-section passing system and control method thereof |
| CN113771700A (en) * | 2021-08-04 | 2021-12-10 | 中铁电气化勘测设计研究院有限公司 | Electric phase splitting equipment for long-distance rail transit high-speed overhead rigid contact network |
| CN113771700B (en) * | 2021-08-04 | 2023-03-31 | 中铁电气化勘测设计研究院有限公司 | Electric phase splitting equipment for long-distance rail transit high-speed overhead rigid contact network |
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