CN102765333B - A kind of electric railway damping type automatic switchover passing phase insulator device - Google Patents
A kind of electric railway damping type automatic switchover passing phase insulator device Download PDFInfo
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- CN102765333B CN102765333B CN201210277013.4A CN201210277013A CN102765333B CN 102765333 B CN102765333 B CN 102765333B CN 201210277013 A CN201210277013 A CN 201210277013A CN 102765333 B CN102765333 B CN 102765333B
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Abstract
A kind of electric railway damping type automatic switchover passing phase insulator device, its composition is: the high-voltage switch gear one (K1) of gap (S1) cross-over connection electrified current transformer one (H1) of neutral section and 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 mouth of current transformer one (H1), the mouth of current transformer two (H2) are all connected with measurement and control unit with the control end of high-voltage switch gear one (K1).This device can avoid high-voltage switch gear frequently to switch the transient overvoltage and excess current that may cause better, realizes train safe reliably automatic passing over of neutral section, and saves operating cost and the maintenance cost of train.
Description
Technical field
The present invention relates to a kind of electric railway damping type automatic switchover passing phase insulator device.
Background technology
Countries in the world electric railway generally adopts single phase industrial frequency AC system, for avoiding causing too much negative-sequence current in electrical network, electric railway often adopts the scheme of rotation phase sequence, phase-splitting switched-mode power supply, every 20-25km forms a service area along the railway, and each service area is respectively by the not cophase supply in electrical network.The mode of this commutation in turn, switched-mode power supply defines a unique texture-electric phase-splitting of electrified railway traction power supply system.Phase place due to electric phase-splitting two ends is different or consider to adopt insulation system for safety and maintenance, therefore electric phase-splitting is also known as insulation phase resolver.From the operational process that a service area is transitioned into another service area, train is called that phase-splitting crossed by train.Due to train speed raising, cross phase-splitting further frequently, train operator must complete phase-splitting operation in very short time, and labour intensity is very big, especially on high speed railway, crosses phase-splitting and almost manually cannot be completed by driver, must adopt automatic passing over of neutral section technology.For making the smooth phase-splitting excessively of train, there has been proposed multiple phase-splitting solution excessively, vehicle-mounted and ground automatic passing over of neutral section two class can be divided into generally.
Vehicle-mounted automatic passing over of neutral section is: by coordinating of train and ground signal, automatically completed phase-splitting ON TRAINS by train control system, before namely sailing neutral section into from a service area, from dynamic circuit breaker auxiliary circuit, disconnected line circuit breaker (vac switch); After sailing another service area into by neutral section, the sequence of operations processes such as auto-fit main circuit breaker road device, conjunction auxiliary circuit.This phase-splitting mode of crossing needs power-off when crossing neutral section, and train by neutral section, can cause certain speed loss by inertia.
Existing ground automatic passing over of neutral section is then coordinated with train position signal by ground high pressure (vacuum) switch, first disconnect a upper service area, and then connect with next service area, namely by high-voltage switch gear by service area's electrical source exchange at two ends in neutral section, when train is by neutral section, carry out the back brake operation of two service areas, need power-off at the part time crossing neutral section, power-off time is short, less on train speed impact.
No matter vehicle-mounted or ground automatic passing over of neutral section, all there is high-voltage switch gear and switch and by the electric process of the transient state of neutral section, even cause over voltage and the excess current of tractive power supply system, affect equipment safety operation.
Contriver had once invented a kind of electric railway switch-free switching auto-passing neutral section device, its core concept is resistors in series between the neutral section of contact system, no longer arrange and switch high-voltage switch gear (circuit breaker), shock damping action is played to the transient overvoltage that may cause in operation and excess current, introduce middle transition transformation process, transient voltage rangeability is little, has slackened the direct transient overvoltage phenomenon crossed phase-splitting and produce.But train is by almost non-reduction of speed during resistor, still has transient voltage to produce when crossing resistor, and phenomenon of arc discharge may occur, and affect the life-span of equipment.
Summary of the invention
Object of the present invention is just to provide a kind of electric railway damping type automatic switchover passing phase insulator device, this device can avoid high-voltage switch gear frequently to switch the transient overvoltage and excess current that may cause better, realize train safe reliably automatic passing over of neutral section, and save operating cost and the maintenance cost of train.
The present invention solves its technical matters, and the technical scheme 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 the gap cross-over connection electrified current transformer one of neutral section and contact system one; Neutral section is provided with 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 mouth of current transformer one, the mouth of current transformer two are all connected with measurement and control unit with the control end of high-voltage switch gear one.
Above technical scheme is applicable to the situation of train one direction by (upstream or downstream as 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.Assuming that train is sailed from the direction of contact system one, the electric current behind the gap of contact system one and neutral section, current transformer one being measured is greater than the electric current that current transformer two is measured, measurement and control unit control high-voltage switch gear one and disconnect at once, train stops getting stream from contact system one, and speed is able to suitable reduction.Train crosses resistor (insulation overlap span) and turns afterwards and powered by contact system two immediately; Now, the electric current that current transformer two is measured is greater than the electric current that current transformer one is measured, and measurement and control unit control high-voltage switch gear K1 and close; Or, after the time (be greater than the time that train leads to phase splitting, but be less than minimum running interval) of setting postpones, measure and control unit control connection high-voltage switch gear one, entered the supply regular power state after 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 causes tractive power supply system electrical equipment, improves power supply reliability and safety.
Two, only need a high-voltage switch gear at undue phase time, the quantity than the high-voltage switch gear of existing ground automatic neutral-section passing device reduces half, and action frequency also reduces half, and transient process reduces half and reduces the impact of train operation; And eliminate ground signal and sensing device thereof, avoid the interference of ground staff and equipment room, reduce investment and maintenance cost, and improve reliability.
Three, compared with existing electric railway damping switch-free switching auto-passing neutral section device, the power supply to train was disconnected by high-voltage switch gear one before crossing resistor at train, train speed is able to suitable reduction, by the time proper extension of resistor, the train phenomenon of arcing by generation moment pressure reduction during resistor at a high speed can be avoided, ensure that the safe operation of train better, improve reliability and the life-span of device.
The gap cross-over connection high-voltage switch gear two of above-mentioned neutral section and contact system two, described current transformer two is the current transformer that high-voltage switch gear two carries.
Such scheme is applicable to the two-way situation by 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 behind the gap of contact system one and neutral section, current transformer one being measured is greater than the electric current that current transformer two is measured, measurement and control unit control high-voltage switch gear one and disconnect at once, train stops from power taking contact system one, and speed is able to suitable reduction.Train crosses resistor (insulation overlap span) and turns afterwards and powered by contact system two immediately; Now, the electric current that current transformer two is measured is greater than the electric current that current transformer one is measured, and measurement and control unit control high-voltage switch gear one and close; Or, after the time (be greater than the time that train leads to phase splitting, but be less than minimum running interval) of setting postpones, measure and control unit control connection high-voltage switch gear one, entered the supply regular power state after phase-splitting.
When train is sailed from the direction of contact system two, the electric current behind the gap of contact system two and neutral section, current transformer two being measured is greater than the electric current that current transformer one is measured, measurement and control unit control high-voltage switch gear two and disconnect at once, train stops from power taking contact system two, and speed is able to suitable reduction.Train crosses resistor immediately, turns and powered by contact system one after insulation overlap span; Now, the electric current that current transformer one is measured is greater than the electric current that current transformer two is measured, and measurement and control unit control high-voltage switch gear two and close; Or, after the time (be greater than the time that train leads to phase splitting, but be less than minimum running interval) of setting postpones, measure and control unit control connection high-voltage switch gear two, entered the supply regular power state after phase-splitting.
Visible, in the undue phase time program, only need the action of a high-voltage switch gear one, and high-voltage switch gear two keeps normally closed, is failure to actuate; High-voltage switch gear action frequency than existing ground automatic neutral-section passing device reduces half, and long service life extends one times; Also eliminate ground signal and sensing device thereof, avoid the interference of ground staff and equipment room, reduce investment and maintenance cost, and improve reliability.And compared with existing electric railway damping switch-free switching auto-passing neutral section device: before crossing resistor at train, disconnected the power supply to train by high-voltage switch gear one or two, train speed is able to suitable reduction, by the time proper extension of resistor, the train phenomenon of arcing by generation moment pressure reduction during resistor at a high speed can be avoided, also ensure that the safe operation of train better, improve reliability and the life-span of device.
The insulation overlap span that above-mentioned neutral section is arranged is two, the equal cross-over connection resistor of each insulation overlap span.
Like this, the against short-circuit ability of apparatus of the present invention can be improved.
The two ends cross-over connection of above-mentioned resistor has by-pass switch.
Like this, when train sailed neutral section into but not by resistor time, parking phenomenon occurs, and due to very short apart from resistor distance, power by recovering rear contact system, train cannot obtain enough energy and pass through resistor smoothly; Now by-pass switch is connected, can resistor be bypassed, pass through closed high-voltage switch gear one or two, by-pass switch to train power supply by the contact system in front, make it roll power supply dead band smoothly away from, entered the supply regular power state after phase-splitting.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one.
Fig. 2 is the structural representation of the embodiment of the present invention two.
Fig. 3 is the structural representation of the embodiment of the present invention three.
Detailed description of the invention
Embodiment one
Fig. 1 illustrates, a kind of detailed description of the invention 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 gap S1 cross-over connection electrified current transformer one H1 of neutral section and 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 mouth of current transformer one H1, the mouth of current transformer two H2 are all connected with measurement and control unit with the control end of high-voltage switch gear one K1.
In this example, the two ends cross-over connection of resistor R has by-pass switch P.
The present embodiment is applicable to the train L situation (upstream or downstream as double-tracking railways) that one direction is passed through from contact system one A to contact system two B.
Embodiment two
Fig. 2 illustrates, the structure of this example is substantially identical with embodiment one, different only: gap S2 cross-over connection high-voltage switch gear two K2 of neutral section and contact system two B, current transformer two H2 is the current transformer that high-voltage switch gear two K2 carries.
This example is applicable to the two-way situation by single track railway of train L.
Embodiment three
Fig. 3 illustrates, the structure of this example is substantially identical with embodiment two, different only: the insulation overlap span SR that described neutral section is arranged is two, each insulation overlap span SR equal cross-over connection resistor R.
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 train rated current; Resistor R rated voltage is 27.5kV, the resistance of resistor R gets 10-505k Ω usually, concrete value is determined by its shock damping action and minimal losses, under choosing corresponding voltage, the resistance of 1 Ampere currents: when the out-phase electricity point exported for traction substation is got along, the rated voltage of electric phase-splitting is 27.5kV, then resistor R resistance gets 27.5k Ω, when for homophase electricity phase-splitting section post time, because usual pressure reduction is less than 10kV, then resistor R resistance can be 10k Ω.In Fig. 3, L is train.
Namely high-voltage switch gear of the present invention can be vac switch, also electronic power switch.
Claims (4)
1. an electric railway damping type automatic switchover passing phase insulator device, its composition is:
The high-voltage switch gear one (K1) of gap (S1) cross-over connection electrified current transformer one (H1) of neutral section and 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 mouth of current transformer one (H1), the mouth of current transformer two (H2) are all connected with measurement and control unit with the control end of high-voltage switch gear one (K1).
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, it is characterized in that: the insulation overlap span (SR) that described neutral section is arranged is two, each insulation overlap span (SR) is cross-over connection resistor (R) all.
4. a kind of electric railway damping type automatic switchover passing phase insulator device according to claim 1 or 3, is characterized in that: the two ends cross-over connection of described resistor (R) has by-pass switch (P).
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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 true CN102765333B (en) | 2015-12-09 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN104477055B (en) * | 2014-11-25 | 2017-01-11 | 中车青岛四方机车车辆股份有限公司 | Passing neutral section operating system for train |
| CN106183897B (en) * | 2016-09-23 | 2018-08-10 | 西南交通大学 | A kind of electric railway subregion institute's automatic neutral-section passing system and its control method |
| 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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| CN2885650Y (en) * | 2006-02-10 | 2007-04-04 | 西安铁路科学技术研究发展有限责任公司 | Automatic splitting device for electric locomotive |
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| CN202669541U (en) * | 2012-08-06 | 2013-01-16 | 李子晗 | Damping-type automatic passing over phase splitter equipment for electrified railway |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| CN2885650Y (en) * | 2006-02-10 | 2007-04-04 | 西安铁路科学技术研究发展有限责任公司 | Automatic splitting device for electric locomotive |
| CN101604841A (en) * | 2009-07-09 | 2009-12-16 | 深圳市奇辉电气有限公司 | Arc extinguishing control device for contact net |
| CN201685724U (en) * | 2010-06-02 | 2010-12-29 | 西南交通大学 | Novel ground overcurrent phase-split control device |
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| CN202669541U (en) * | 2012-08-06 | 2013-01-16 | 李子晗 | Damping-type automatic passing over phase splitter equipment for electrified railway |
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