CN207156985U - A kind of railway contact line overlap formula electricity segmentation arc suppressing means - Google Patents
A kind of railway contact line overlap formula electricity segmentation arc suppressing means Download PDFInfo
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- CN207156985U CN207156985U CN201721147356.3U CN201721147356U CN207156985U CN 207156985 U CN207156985 U CN 207156985U CN 201721147356 U CN201721147356 U CN 201721147356U CN 207156985 U CN207156985 U CN 207156985U
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- power electronics
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Abstract
The utility model discloses a kind of railway contact line overlap formula electricity segmentation arc suppressing means, including it is connected across the power electronics solid-state switch at electricity segmentation both endsAnd it is serially connected in power electronics solid-state switchThe online disconnecting switch at both endsWith, in addition to two couples of train position detection sensor J on electricity segmentation both ends track1(J1 ’) and J2(J2 ’), described power electronics solid-state switchIt is the valve group being in series by multiple forward and reverse IGCT levels in parallel, is parallel with a resistance capaciting absorpting circuit in each IGCT level, is driven using Fiber isolation；Produced because solid-state switch is that current over-zero turns off naturally, therefore without overvoltage, electric arc will not be produced, therefore will not occur due to burning net line-outage contingency caused by electric arc sustained combustion.
Description
Technical field
The utility model belongs to electrification railway contact net traction power supply technical field, suitable for electrification railway contact net
Electricity segmentation arc suppression application scenario, more particularly to a kind of electrification railway contact net overlap formula electricity segmentation arc suppression dress
Put.
Background technology
Electrification railway contact net is special supply line, in order to ensure the reliability of power supply and flexibility, and is reduced
Maintenance or power outage occur scope, to be electrically segmented, same electric substation power supply different electric subregions same phase it
Between insulation, referred to as be electricity segmentation.The pattern of electricity segmentation has two kinds：One kind is device type electricity segmentation, and electricity is realized by insulator
Draw last breath edge；One kind is the electricity segmentation of overlap formula, and electric insulation is realized by the air gap.
In actual use, electric train pantograph is ironed by the electric sudden strain of a muscle of overlap formula electricity segmentation generation often, arcing,
Even because electric arc sustained combustion triggers contact net burn, the accident of broken string, serious threat railway equipment safety and operation security.
Electricity segmentation is with the insulation between phase bus, when electric locomotive is segmented by anchor segmentation electricity to same traction substation
Equivalent circuit diagram can be represented with Fig. 1.
Due to the power supply length difference of electricity segmentation two-side supply subregion, the influence of supply line's impedance, and due to difference
Locomotive in service load is different on feeder line, although the same traction bus from traction power transformation, electricity segmentation both ends have voltage difference：。
When block of bow collector of electric locomotive is segmented by overlap formula electricity, there are No. 1 and No. 2 feeder lines of short circuit in short-term in A, B point
Process, due to voltage differencePresence, through current be present between two feeder lines.When pantograph is slided, No. 1 feeder line and No. 2
When feed gap widens, due to the influence of line inductance, through current, which can not be mutated, will produce the production of over-voltage breakdown the air gap
Raw electric arc, when voltage difference is larger, although hereafter block of bow collector of electric locomotive leaves electric segmentation, through current continues through electric arc
Transmit, now electric arc will sustained combustion, eventually result in catenary cut off situation occur.
Utility model content
According to the deficiencies in the prior art, the purpose of this utility model is to propose a kind of electrification railway contact net overlap
Formula electricity segmentation arc suppressing means, using high-pressure high-power thyristor valve group as power electronics solid-state switch, are arranged by detecting
Car reach situation control power electronics solid-state switch turn-on and turn-off in real time so that train excessively electricity segmentation when, electric arc will not be produced
And overvoltage.
Technical scheme is used by the utility model solves its technical problem：A kind of railway contact line overlap formula electricity
Arc suppressing means are segmented, including are connected across the power electronics solid-state switch at electricity segmentation both endsAnd it is serially connected in power electronics and consolidates
State switchsThe online disconnecting switch at both endsWith, in addition to two pairs of train positions on electricity segmentation both ends track
Detection sensor J1(J1 ’) and J2 (J2 ’), described power electronics solid-state switchIt is by multiple forward and reverse IGCTs in parallel
The valve group that is in series of level, a resistance capaciting absorpting circuit is parallel with each IGCT level, is driven using Fiber isolation.
A kind of described railway contact line overlap formula electricity segmentation arc suppressing means, described power electronics solid-state are opened
CloseWith disconnecting switch of surfing the NetWith online disconnecting switchBetween be connected to high-accuracy voltage transformer PT1And height
Accuracy voltage transformer PT2。
A kind of described railway contact line overlap formula electricity segmentation arc suppressing means, its train position detection sensor
For optics, microwave or RF Technology for Measuring.
A kind of described railway contact line overlap formula electricity segmentation arc suppressing means, its electricity segmentation front are provided with one
Individual overlap fracture, a Current Transmit in parallel on described overlap fracture.
A kind of described railway contact line overlap formula electricity segmentation arc suppressing means, its power electronics solid-state switch
Both ends are parallel with a circuit breaker Q F.
The beneficial effects of the utility model are：
When train enters overlap formula electricity identification by stages region, by being segmented to contact net overlap formula electricity
The regular control break-make of the power electronics solid-state switch of arc suppressing means, train excessively electricity segmentation when, electricity segmentation fracture
On will not produce overvoltage and electric arc, the reliability of contact net traction power supply is improved, and the device is not identifying in train
In state is cut-off during area, the function of overlap formula electricity segmentation is not influenceed；Due to contact net overlap formula electricity segmentation electric arc
The core component of restraining device is the power electronics solid-state switch based on the design of high-pressure high-power thyristor valve group, compared to common
Mechanical structure breaker, long lifespan, reliability is high, opens in the absence of delay, shut-off is at the electric current natural zero-crossing moment, will not be produced
Raw shut-off overvoltage and electric arc.
Brief description of the drawings
Fig. 1 is equivalent circuit diagram when electric locomotive is segmented by overlap formula electricity；
Fig. 2 show the first implementation of the utility model device；
Fig. 3 show second of implementation of the utility model device；
Fig. 4 show the third implementation of the utility model device；
Fig. 5 show the 4th kind of implementation of the utility model device；
Fig. 6 show the 5th kind of implementation of the utility model device；
Fig. 7 show the schematic diagram of the utility model device power electronics solid-state switch
Fig. 8 is operation principle of the utility model device when train does not reach detection interval P1-P2；
Fig. 9, Figure 10 are operation principle of the utility model device when train enters detection interval P1-P2；
Figure 11 is operation principle of the utility model device when train leaves detection interval P1-P2.
Each reference is：- power electronics solid-state switch,- online disconnecting switch,- online is kept apart
Close, J1、J1 ’、J2、J2 ’- train position detection sensor, PT1- high-accuracy voltage transformer, PT2The mutual inductance of-high-accuracy voltage
Device, CT-current transformer, QF-breaker.
Embodiment
Embodiment 1
As shown in Fig. 2 the utility model discloses a kind of railway contact line overlap formula electricity to be segmented arc suppressing means,
By specifically controlling so that train excessively electricity segmentation when, electric arc and overvoltage will not be produced, fundamentally can thoroughly solve at present
Existing for the electricity segmentation of contact net anchor segmentation the problem of overvoltage, electric arc, burning bow, broken string, including it is connected across the electricity at electricity segmentation both ends
Power electronic solid stateAnd it is serially connected in power electronics solid-state switchThe online disconnecting switch at both endsWith, also wrap
Include two couples of train position detection sensor J on the electricity segmentation siding track of section two1(J1 ’) and J2 (J2 ’), examined by sensor
Survey whether identification wheel reaches the detection interval P1-P2 of electricity segmentation, power electronics solid-state switch to signal, detection trainBy upper
Net disconnecting switchWithOnline is connected to the both ends of electricity segmentation, disconnecting switch of surfing the NetWithMainly in electric power
Electronic solid statePlay a part of to isolate disjunction during maintenance, be normal closure state during device bringing normally into operation；Train on track
Position-detection sensor J1(J1 ’) and J2 (J2 ’) for the identification to detection interval P1-P2, i.e., when train reaches J1(J1 ’) position
J is not reached2 (J2 ’) position when, represent train enter detection interval P1-P2, when train leaves J completely2 (J2 ’) when, represent row
Car have left detection interval P1-P2.
Described power electronics solid-state switchIt is the valve group being in series by multiple forward and reverse IGCT levels in parallel,
A resistance capaciting absorpting circuit is parallel with each IGCT level, IGCT level has static and dynamic voltage balancing ability, using optical fiber
Isolation drive.
By the work of the utility model device, it can completely inhibit when electric locomotive is segmented by overlap electricity and produce electricity
Arc, the reliability of contact net traction power supply is improved, because the power electronics solid-state switch that the utility model uses is to be based on high pressure
High-power thyristor valve group designs, and compared to common mechanical structure breaker, has reliability height, long lifespan, Maintenance free spy
Point, it can be widely applied to existing line and newly-built circuit.
Embodiment 2
It is as shown in figure 3, different with the identification method for being a difference in that detection interval P1-P2 of embodiment 1.The realization side
Formula is to use high-accuracy voltage transformer PT1With high-accuracy voltage transformer PT2The electricity at overlap formula electricity segmentation both ends is measured respectively
Pressure, pass through the voltage difference at the mathematic interpolation electricity segmentation both ends of two voltage measuring transformers.
Because the line impedance on electricity segmentation both ends power supply zone and the dispersiveness of load, electricity segmentation both ends are inevitable in engineering
Voltage difference be present, as described in background, when train pantograph is by electricity segmentation, has and carry out two power supply zones of electricity segmentation
The process of short circuit, the pressure difference at now electricity segmentation both ends is necessarily zero；Therefore, when control system detects the He of voltage transformer pt 1
When PT2 voltage difference is 0, that is, think that train enters detection interval P1-P2, trigger power electronics solid-state switch immediatelyConducting,
Control system starts timing, a period of timeThink that train have left detection interval P1-P2, control power electronics solid-state afterwards
SwitchNaturally turn off.
Wherein timing timeSetting need according to reality operation train speed and overlap formula electricity be segmented ascending a height
The length of point determines.
Embodiment 3
As shown in figure 4, differ with identification method that the difference of embodiment 1 and embodiment 2 is also detection interval P1-P2
Sample.This, which is achieved in that on the pillar by the track at electricity segmentation both ends, installs optics, microwave or RF Technology for Measuring.
Optical identifying apparatus can with when infrared or laser, general principle is ranging, measured before and after being arrived using train away from
Deviation is not identified.
Microwave, rfid device, usually paired, general principle is used wave transmission and reception, when on track
When there is no an object can normal sending and receiving electric wave signal, when there is object on track electric wave signal can not normal sending and receiving, by this
Method detection identification.
In order to improve which to the detection interval P1-P2 accuracys identified and reliability, it is necessary at electricity segmentation both ends point
The installation detecting device not on multiple pillars, carries out redundancy fault-tolerant analyzing and processing, and the utility model embodiment is distributed in electricity point
It is mounted with that optical identifying apparatus carries out redundancy fault-tolerant analysis and judges train whether in detection on three pillars at section both ends respectively
Section P1-P2.
Embodiment 4
As shown in figure 5, from three kinds of different places of embodiment before reality be also detection interval P1-P2 identification method not
Equally.
The implementation redesigns to the electricity segmentation of overlap formula, on the basis of intrinsic, before electricity is segmented
Face increases an overlap fracture, then is got up with electrical connection short circuit, while concatenates a Current Transmit, is not changing anchor
On the basis of the function of section articulated type electricity segmentation, it can identify that train enters by size of current that current transformer detects
Detection interval P1-P2, as the implementation of embodiment 2, and pass through delayIdentification train leaves detection interval.The implementation
Mode is applicable to be segmented with the segmentation of newly-built contact net electricity or the existing electricity for having transformation condition.
Embodiment 5
As shown in fig. 6, one kind as embodiment 1 is improved, it is exactly in power electronics solid-state switchBoth ends parallel connection one
Individual circuit breaker Q F, main function are when power electronics solid-state switch failure, play interim substituted role.
Power electronics solid-state switch of the present utility modelIt is to be in series by multiple forward and reverse IGCT levels in parallel
Valve group, each IGCT level are designed with resistance capaciting absorpting circuit, driven using Fiber isolation, schematic diagram is as shown in Figure 7.
IGCT level has static and dynamic voltage balancing ability, the highest that its rated voltage should be by contact net supply arm over the ground
Voltage design, has the ability for being resistant to short circuit current in short-term, and the specific size for being resistant to short-time current and tolerance time need to refer to
The related specifications of contact net traction power supply and requirement design.
The utility model is using advanced based on the electronic power convertor design continuous electric supply installation of ground automatic passing over of neutral section
As core component, the smooth continuous commutation power supply of contact net electricity split-phase is realized, was not powered off suitable for electric railway train
Split-phase, virtual cophase supply, electric railway flexible power supply, flexible too equal application scenario.Its method to arc suppression
It is as follows：
1, when train does not reach P1-P2 sections, to power electronics solid-state switchCut-off signals are sent, it is in disjunction
State, electric locomotive is from No. 1 feeder line power taking, as shown in Figure 8.
2, when train reaches P1-P2 sections, to power electronics solid-state switchContinuity signal is sent, due to voltage differenceIn the presence of, the conducting of power electronics solid-state switch, now, electricity segmentation is by power electronics solid-state switchShort circuit, equivalent to
Electricity segmentation is not present, and before electric locomotive leaves P1-P2 sections, electric locomotive will take jointly from No. 1 feeder line and No. 2 feeder lines
Electricity, as shown in Figure 9 and Figure 10.
3, when electric locomotive leaves P1-P2 sections completely, to power electronics solid-state switchCut-off signals are sent, when wearing
More current over-zero when, power electronics solid-state switchBy natural shut-off, electric locomotive is transformed into naturally independently to be supplied by No. 2 feeder lines
Electricity, as shown in figure 11.
Produced because solid-state switch is that current over-zero turns off naturally, therefore without overvoltage, will not produce electric arc, therefore by
Net line-outage contingency is burnt caused by electric arc sustained combustion to be occurred.
Above-mentioned simply several better embodiments of the present utility model, not make any formal limit to the utility model
System, although better embodiment is disclosed above for the utility model, but is not limited to the utility model.Therefore, it is every
Without departing from the content of technical solutions of the utility model, according to the utility model technical spirit, what embodiment of above was done is any
Modification, equivalent variations and modification, all should fall into the scope of protection of the utility model.
Claims (5)
- A kind of 1. railway contact line overlap formula electricity segmentation arc suppressing means, it is characterised in that：Including being connected across electric segmentation The power electronics solid-state switch at both ends（）And it is serially connected in power electronics solid-state switch（）The online disconnecting switch at both ends（）With online disconnecting switch（）, in addition to a pair of train position detection sensor J on electricity segmentation both ends track1 (J1 ’) and a pair of train position detection sensor J2 (J2 ’), described power electronics solid-state switch（）It is by multiple positive and negative To the valve group that is in series of IGCT level of parallel connection, a resistance capaciting absorpting circuit is parallel with each IGCT level, using optical fiber Isolation drive.
- 2. a kind of railway contact line overlap formula electricity segmentation arc suppressing means according to claim 1, its feature exist In described power electronics solid-state switch（）With disconnecting switch of surfing the Net（）With online disconnecting switch（）Between respectively It is connected with high-accuracy voltage transformer（PT1）With high-accuracy voltage transformer（PT2）.
- 3. a kind of railway contact line overlap formula electricity segmentation arc suppressing means according to claim 1, its feature exist In described train position detection sensor is optics, microwave or RF Technology for Measuring.
- 4. a kind of railway contact line overlap formula electricity segmentation arc suppressing means according to claim 1, its feature exist In described electricity segmentation front is provided with an overlap fracture, and an electric current in parallel is mutual on described overlap fracture Sensor（CT）.
- 5. a kind of railway contact line overlap formula electricity segmentation arc suppressing means according to claim 1, its feature exist In described power electronics solid-state switch（）Both ends are parallel with a breaker（QF）.
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| CN201721147356.3U CN207156985U (en) | 2017-09-08 | 2017-09-08 | A kind of railway contact line overlap formula electricity segmentation arc suppressing means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107627906A (en) * | 2017-09-08 | 2018-01-26 | 中国船舶重工集团公司第七〇二研究所 | A kind of railway contact line overlap formula electricity segmentation arc suppressing means and its method |
| CN110857039A (en) * | 2018-08-23 | 2020-03-03 | 中铁第四勘察设计院集团有限公司 | Contact net anchor section joint power supply conversion method and system |
-
2017
- 2017-09-08 CN CN201721147356.3U patent/CN207156985U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107627906A (en) * | 2017-09-08 | 2018-01-26 | 中国船舶重工集团公司第七〇二研究所 | A kind of railway contact line overlap formula electricity segmentation arc suppressing means and its method |
| CN110857039A (en) * | 2018-08-23 | 2020-03-03 | 中铁第四勘察设计院集团有限公司 | Contact net anchor section joint power supply conversion method and system |
| CN110857039B (en) * | 2018-08-23 | 2021-11-09 | 中铁第四勘察设计院集团有限公司 | Contact net anchor section joint power supply conversion method and system |
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