CN107627906A - A kind of railway contact line overlap formula electricity segmentation arc suppressing means and its method - Google Patents
A kind of railway contact line overlap formula electricity segmentation arc suppressing means and its method Download PDFInfo
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- CN107627906A CN107627906A CN201710804301.3A CN201710804301A CN107627906A CN 107627906 A CN107627906 A CN 107627906A CN 201710804301 A CN201710804301 A CN 201710804301A CN 107627906 A CN107627906 A CN 107627906A
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Abstract
The invention 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；Also disclose the method for suppressing electric arc；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 invention belongs to electrification railway contact net traction power supply technical field, suitable for electrification railway contact net electricity point
Section arc suppression application scenario, more particularly to a kind of electrification railway contact net overlap formula electricity segmentation arc suppressing means,
And its implementation.
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.
The content of the invention
According to the deficiencies in the prior art, an object of the present invention 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.
The technical solution adopted for the present invention to solve the technical problems is：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 and opens
CloseThe online disconnecting switch at both endsWith, in addition to two pairs of train position detections biography on electricity segmentation both ends track
Sensor J1(J1 ’) and J2 (J2 ’), described power electronics solid-state switchIt is to be connected by multiple forward and reverse IGCT levels in parallel
The valve group formed, 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 PT1With it is high-precision
Spend 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 second object of the present invention is to provide a kind of electrification railway contact net overlap formula electricity segmentation arc suppression side
Method, comprise the following steps：
1）, when train does not reach P1-P2 sections, to power electronics solid-state switchCut-off signals are sent, it is in disjunction shape
After state, electric locomotive is from No. 1 feeder line power taking；
2）, when train reach P1-P2 sections when, to power electronics solid-state switchContinuity signal is sent, electricity segmentation is by electric power electricity
Sub- solid-state switchShort circuit, before electric locomotive leaves P1-P2 sections, electric locomotive takes jointly from No. 1 feeder line and No. 2 feeder lines
Electricity；
3）, when electric locomotive leaves P1-P2 sections completely, to power electronics solid-state switchSend cut-off signals, electric power machine
Car is transformed into independently-powered by No. 2 feeder lines.
The beneficial effects of the invention are as follows：
When train enters overlap formula electricity identification by stages region, by contact net overlap formula electricity segmentation electric arc
The regular control break-make of the power electronics solid-state switch of restraining device, train excessively electricity segmentation when, electricity segmentation fracture on not
Overvoltage and electric arc can be produced, the reliability of contact net traction power supply is improved, and the device is not when train is in cog region
In the state of cut-offfing, the function that overlap formula electricity is segmented is not influenceed；Due to contact net overlap formula electricity segmentation arc suppression
The core component of device is the power electronics solid-state switch based on the design of high-pressure high-power thyristor valve group, compared to common machinery
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 produce pass
Disconnected 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 apparatus of the present invention；
Fig. 3 show second of implementation of apparatus of the present invention；
Fig. 4 show the third implementation of apparatus of the present invention；
Fig. 5 show the 4th kind of implementation of apparatus of the present invention；
Fig. 6 show the 5th kind of implementation of apparatus of the present invention；
Fig. 7 show the schematic diagram of apparatus of the present invention power electronics solid-state switch
Fig. 8 is operation principle of the apparatus of the present invention when train does not reach detection interval P1-P2；
Fig. 9, Figure 10 are operation principle of the apparatus of the present invention when train enters detection interval P1-P2；
Figure 11 is operation principle of the apparatus of the present invention 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 invention discloses a kind of railway contact line overlap formula electricity segmentation arc suppressing means, by specific
Control so that train excessively electricity segmentation when, electric arc and overvoltage will not be produced, fundamentally can thoroughly solve current contact net anchor
Segmentation electricity segmentation existing for overvoltage, electric arc, burn bow, broken string the problem of, including be connected across electricity segmentation both ends power electronics consolidate
State switchsAnd it is serially connected in power electronics solid-state switchThe online disconnecting switch at both endsWith, in addition to positioned at electricity point
Two couples of train position detection sensor J on the section siding track of section two1(J1 ’) and J2 (J2 ’), identification wheel pair is detected by sensor
Whether signal, detection train reach the detection interval P1-P2 of electricity segmentation, power electronics solid-state switchPass through disconnecting switch of surfing the NetWithOnline is connected to the both ends of electricity segmentation, disconnecting switch of surfing the NetWithMainly in power electronics solid-state switch
Play a part of to isolate disjunction during maintenance, be normal closure state during device bringing normally into operation；Train position detection sensor on track
J1(J1 ’) and J2 (J2 ’) for the identification to detection interval P1-P2, i.e., when train reaches J1(J1 ’) position do not reach J2 (J2 ’)
During position, represent that train enters detection interval P1-P2, when train leaves J completely2 (J2 ’) when, represent that train have left detection zone
Between P1-P2.
Described power electronics solid-state switchIt is the valve group being in series by multiple forward and reverse IGCT levels in parallel, often
Be parallel with a resistance capaciting absorpting circuit in individual IGCT level, IGCT level has static and dynamic voltage balancing ability, using optical fiber every
From driving.
By the work of apparatus of the present invention, it can completely inhibit when electric locomotive is segmented by overlap electricity and produce electric arc,
The reliability of contact net traction power supply is improved, because the power electronics solid-state switch that the present invention uses is brilliant based on high-power
Brake tube valve group designs, and compared to common mechanical structure breaker, has reliability high, long lifespan, Maintenance free feature can be extensive
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.This is achieved in that
With high-accuracy voltage transformer PT1With high-accuracy voltage transformer PT2The voltage at overlap formula electricity segmentation both ends is measured respectively,
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, with the difference of embodiment 1 and embodiment 2 be also detection interval P1-P2 identification method it is different.
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 embodiment of the present invention is distributed in electricity segmentation two
It is mounted with that optical identifying apparatus carries out redundancy fault-tolerant analysis and judges whether train is in detection interval on three pillars at end respectively
P1-P2。
Embodiment 4
As shown in figure 5, it is also that detection interval P1-P2 identification method differs from three kinds of different places of embodiment before reality
Sample.
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 switchOne in parallel of both ends it is disconnected
Road device QF, main function are when power electronics solid-state switch failure, play interim substituted role.
The power electronics solid-state switch of the present inventionIt is the valve group being in series by multiple forward and reverse IGCT levels in parallel,
Each IGCT level is designed with resistance capaciting absorpting circuit, is 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 present invention is using advanced based on the electronic power convertor design continuous electric supply installation conduct of ground automatic passing over of neutral section
Core component, realize the smooth continuous commutation power supply of contact net electricity split-phase, suitable for electric railway train do not power off undue phase,
Virtual cophase supply, electric railway flexible power supply, flexible too equal application scenario.Its method to arc suppression 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 shape
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.
Several better embodiments of the above-mentioned simply present invention, not make any formal limitation to the present invention, although
Better embodiment is disclosed above by the present invention, but is not limited to the present invention.Therefore, it is every without departing from the technology of the present invention
The content of scheme, according to the technology of the present invention essence, any modification, equivalent variations and the modification made to embodiment of above all should
Fall within the scope of protection of the present invention.
Claims (6)
- 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 forward and reverse The valve group that IGCT level in parallel is in series, be parallel with a resistance capaciting absorpting circuit in each IGCT level, using optical fiber every From driving.
- 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 connect respectively It is connected to 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）.
- 6. a kind of method that arc suppressing means as described in claim 1 to 5 any one suppress electric arc, it is characterised in that bag Include following steps：1）, when train does not reach P1-P2 sections, to power electronics solid-state switch（）Cut-off signals are sent, it is in disjunction shape After state, electric locomotive is from No. 1 feeder line power taking；2）, when train reach P1-P2 sections when, to power electronics solid-state switch（）Continuity signal is sent, electricity segmentation is by electric power Electronic solid state（）Short circuit, before electric locomotive leaves P1-P2 sections, electric locomotive is total to from No. 1 feeder line and No. 2 feeder lines Same power taking；3）, when electric locomotive leaves P1-P2 sections completely, to power electronics solid-state switch（）Send cut-off signals, electric power machine Car is transformed into independently-powered by No. 2 feeder lines.
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| CN109932586A (en) * | 2018-09-28 | 2019-06-25 | 国网陕西省电力公司电力科学研究院 | Mutual inductor Electro Magnetic Compatibility detection device and method based on solid-state switch control |
| CN109987003A (en) * | 2019-04-18 | 2019-07-09 | 成都尚华电气有限公司 | A kind of power train crosses segmentation control system and its method |
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| CN115583180A (en) * | 2022-10-26 | 2023-01-10 | 西南交通大学 | Method for suppressing arcing overvoltage and excessive phase-splitting VCB operation overvoltage |
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