CN208665010U

CN208665010U - A kind of electric railway AT institute powered construction

Info

Publication number: CN208665010U
Application number: CN201821374946.4U
Authority: CN
Inventors: 李群湛; 易东; 陈民武
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2018-08-24
Filing date: 2018-08-24
Publication date: 2019-03-29
Anticipated expiration: 2028-08-24

Abstract

The utility model discloses a kind of electric railway AT institute powered constructions: electric railway traction power supply observation and control technology field.It is divided into the first branch parallel with one another, second branch and third branch after the contact net terminal concatenation disconnecting switch of auto-transformer to feed out, two sectionalisers are set on the contact net that AT is exported, it is connected between two sectionalisers by transition region, every branch passes through breaker, current transformer and upper cable and is connected on the contact net at sectionaliser or transition region nearby, wherein, breaker, current transformer in every branch are connected with upper cable in series system, and voltage transformer is arranged in parallel between contact net and rail.It can not only timely and accurately find failure and isolated fault, but also can manipulate thoroughly eliminate pantograph shorting contact net when train drives into faulty section from non-faulting section new short circuit and train on-load is caused to enter non-Electric region by breaker and cause arcing and scaling loss, even blow the phenomenon that contact net causes accident and hidden danger.

Description

A kind of electric railway AT institute powered construction

Technical field

The utility model belongs to attached wires of AC electrified railway traction power supply observation and control technology field.

Background technique

The AT power supply mode of electric railway has stronger power supply capacity and longer power supply compared to direct feeding system Arm lengths, it is possible to reduce electric split-phase and non-Electric region, therefore, China's high-speed rail have nearly all selected AT power supply mode.

Existing high-speed rail power supply mode uses the full parallel form of uplink and downlink, its advantage is that power supply capacity can further enhance, But disadvantage is, once failure, coverage will further expansion.A kind of improvement project be by traction substation, AT institute and Subregion is segmented, i.e., installs sectionaliser in the contact net that AT is exported, be isolated with the segment failure of realization, failure is limited In minimum zone, guarantee larger range of normal power supply.But new problem is: (1) breaker open operation at faulty section both ends After Fault Isolation, if train drives into faulty section from non-faulting section, pantograph can connecing normal contact net and faulty section It touches net and is shorted, cause new short trouble；(2) if the open circuit at the catenary cut off of faulty section one end or faulty section both ends Instantaneous short-circuit failure has disappeared after device separating brake, if train from non-faulting section drives into faulty section at this time, belongs to train on-load Into non-Electric region, arcing, arcing meeting scaling loss contact line will be caused, or even blows contact line, is led to a disaster.

Obviously, technical problem urgently to be solved is now: while being found in time and accurately with isolated fault, thoroughly Eliminating pantograph shorting contact net when train drives into faulty section from non-faulting section causes new short circuit and train on-load to enter nothing The phenomenon that electric area causes arcing and scaling loss, even blows contact net and cause accident and hidden danger.

Utility model content

The utility model mesh is to provide a kind of electric railway AT institute powered construction, can efficiently solve and deposit in the prior art The technical issues of cannot timely and accurately finding failure and isolated fault, then by breaker manipulation can thoroughly eliminate train Pantograph shorting contact net causes new short circuit and train on-load to enter non-Electric region and cause when driving into faulty section from non-faulting section Arcing and scaling loss, the phenomenon that even blowing contact net and causing accident and hidden danger, thus improve power supply system reliability and The efficiency of railway transportation.

In order to solve the above-mentioned technical problem, the utility model proposes following technical solutions:

A kind of electric railway AT institute powered construction, including auto-transformer, auto-transformer connect contact net, rail, Negative feeder constitutes AT power supply system, voltage transformer is arranged in parallel between contact net and rail, on the contact net that AT is exported Two sectionalisers are set, are connected between two sectionalisers by transition region, the contact net terminal concatenation of auto-transformer is kept apart It is divided into the first branch parallel with one another, second branch and third branch behind pass, every branch passes through breaker, current transformer It is connected on the contact net at sectionaliser or transition region nearby with upper cable, wherein the breaker, electric current in every branch are mutual It is connected between sensor and upper cable three in series system.

Preferably, two sectionalisers being serially connected, i.e. sectionaliser one and segmentation are arranged in the contact net that the AT is exported Device two concatenates；Contact net between the sectionaliser one and the sectionaliser two is transition region.

It is further preferred that the first branch is nearest by concatenation breaker one, current transformer one and upper cable one It is connected in the transition region between sectionaliser one and sectionaliser two.

It is further preferred that the second branch is nearest by concatenation current transformer two, breaker two and upper cable two It is connected on the contact net of one left end of sectionaliser.

It is further preferred that third branch is connected nearby by concatenation current transformer three, breaker three and upper cable three Onto the contact net of two right end of sectionaliser.

Compared with prior art, the utility model has the following beneficial effects:

AT powered construction described in technical solutions of the utility model is mainly arranged two points on the contact net that AT is exported Section device, is arranged transition region between two sectionalisers, can not only timely and accurately find failure and isolated fault, but also can pass through Breaker manipulation can thoroughly eliminate pantograph shorting contact net when train drives into faulty section from non-faulting section cause new short circuit and Train on-load enters the phenomenon that non-Electric region causes arcing and scaling loss, even blows contact net and cause accident and hidden danger, thus Improve the reliability of AT power supply system and the efficiency of railway transportation；Meanwhile the relevant apparatus being related to invests less, embodiment party Just, it is both used convenient for new line, is also convenient for old line transformation.

Detailed description of the invention

Fig. 1 is the circuit diagram of the utility model.

Fig. 2 is the structural schematic diagram of the utility model.

Fig. 3 is the structural schematic diagram of the utility model.

Specific embodiment

In order to be best understood from the utility model, the working principle of the utility model are as follows: when contact network short circuit fault, contact net Voltage train decompression lower than state threshold, train current transformer net side (not shown) are closed, load=0, contact net short dot two Side breaker open operation.When contacting network short circuit fault, the breaker open operation at faulty section both ends, transition region breaker open operation, in this way It is formed three kinds of sections of AT sections normal, transition region and faulty section.Normal AT sections of recovery normal power supply at this time, but lost in short circuit Press range, transition region and faulty section are without electricity, and the train current transformer net side within the scope of decompression is closed, i.e. train load=0, train by Normal AT section are not on-load when being entered by the sectionaliser that the AT is exported without electric transition region, therefore can be to avoid column The phenomenon that vehicle on-load enters non-Electric region, would not cause arcing and scaling loss, even blow contact net and cause accident and hidden danger, Simultaneously transition region breaker open operation and without electricity, it is by electricity when can drive into faulty section from AT sections normal (non-faulting section) to avoid train The contact net of non-faulting section contact net and faulty section is shorted and causes new short circuit by bow.In order to make those skilled in the art more The technical solution of the utility model is understood well, the utility model is made in the following with reference to the drawings and specific embodiments further detailed It describes in detail bright.

As shown in Figure 1, the utility model embodiment provides a kind of electric railway AT institute powered construction, the AT packet Auto-transformer is included, auto-transformer connects contact net, rail, negative feeder and constitutes AT power supply system, AT institute powered construction It is: is divided into the first branch parallel with one another, second after the contact net terminal concatenation disconnecting switch GL of the auto-transformer AT Two sectionalisers are arranged on the contact net T that AT is exported, are connected between two sectionalisers by transition region Ta for road and third branch It connects, every branch passes through on the contact net T that breaker, current transformer and upper cable are connected to nearby at sectionaliser, wherein Breaker, current transformer in every branch are connected with upper cable in series system.In utility model embodiment, the AT institute Two sectionalisers being serially connected, i.e. one FDa of sectionaliser and two FDb of sectionaliser concatenation is arranged in the contact net T of outlet；The segmentation Contact net between two FDb of one FDa of device and the sectionaliser is transition region Ta.The breaker is normally closed；Each sectionaliser Train electrification can passed through.

In utility model embodiment, the first branch by concatenation one DL of breaker, one LH of current transformer and on One SW of cable is connected to nearby on the transition region Ta between two FDb of one FDa of sectionaliser and sectionaliser.The second branch passes through string It meets two LH ' of current transformer, two DL ' of breaker and two SW ' of upper cable is connected to the contact net T of one left end FDa of sectionaliser nearby On.Third branch is connected to sectionaliser two by concatenation three LH of current transformer ", three DL of breaker " and upper cable three SW " nearby On the contact net T of FDb right end.In utility model embodiment, mutual induction of voltage is arranged in parallel between the contact net T and rail R Device YH.

And two sectionalisers in left and right, two sectionalisers are arranged in the utility model embodiment on the contact net T that AT is exported Between connected by transition region Ta, transition region Ta by AT self coupling straighten and connect power supply, by the sectionaliser at both ends respectively by two The contact net T at end is divided；When contact net T short trouble, the train current transformer net side within the scope of decompression is closed, i.e. train load =0, when one FDa of sectionaliser and two FDb of sectionaliser and contact net T transition region that train is exported by the AT is not on-load , therefore non-Electric region can be entered to avoid train on-load, arcing and scaling loss would not be caused, even contact net is blown and causes The phenomenon that accident and hidden danger, while contact net T transition region separating brake power loss, when can drive into faulty section from non-faulting section to avoid train The contact net of non-faulting section contact net and faulty section is shorted and causes new short circuit by its pantograph.

As shown in Fig. 2, AT institute described in the present embodiment included by a kind of AT of electric railway AT powered construction, the AT Included auto-transformer AT, wherein the auto-transformer AT is connect with contact net T, rail R and negative feeder F respectively.Such as Fig. 3 Shown, a kind of power supply system of electrified railway includes multiple electric railway AT institutes described in the utility model embodiment. It can be entered using the institute of electric railway AT described in the utility model embodiment and AT institute power supply system to avoid train on-load Non-Electric region, the phenomenon that arcing and scaling loss would not be caused, even contact net is blown and cause accident and hidden danger, while contact net T Transition region separating brake power loss, when can drive into faulty section from non-faulting section to avoid train its pantograph by non-faulting section contact net and therefore The contact net of barrier section is shorted and causes new short circuit.

Above are merely preferred embodiments of the utility model, it is noted that above-mentioned preferred embodiment should not regard For limitations of the present invention, the protection scope of the utility model should be defined by the scope defined by the claims..For For those skilled in the art, without departing from the spirit and scope of the utility model, it can also make several Improvements and modifications, these improvements and modifications also should be regarded as the protection scope of the utility model.

Claims

1. a kind of electric railway AT institute powered construction, including auto-transformer (AT), auto-transformer (AT) connects contact net (T), rail (R), negative feeder (F) constitute AT power supply system, are arranged in parallel voltage transformer between contact net (T) and rail (R) (YH), which is characterized in that two sectionalisers are set on the contact net (T) that AT is exported, pass through transition between two sectionalisers Area (Ta) connection, the contact net terminal of auto-transformer (AT) are divided into parallel with one another first after concatenating disconnecting switch (GL) Road, second branch and third branch, every branch pass through breaker, current transformer and upper cable and are connected to sectionaliser nearby Or on the contact net (T) at transition region, wherein be between breaker, current transformer and the upper cable three in every branch Series system connection.

2. electric railway AT institute according to claim 1 powered construction, which is characterized in that the contact that the AT is exported Two sectionalisers being serially connected, i.e. sectionaliser one (FDa) and sectionaliser two (FDb) concatenation are arranged in net (T)；The sectionaliser one (FDa) contact net between the sectionaliser two (FDb) is transition region (Ta).

3. electric railway AT institute according to claim 2 powered construction, which is characterized in that the first branch passes through string It connects breaker one (DL), current transformer one (LH) and upper cable one (SW) and is connected to sectionaliser one (FDa) and sectionaliser nearby In transition region (Ta) between two (FDb).

4. electric railway AT institute according to claim 2 powered construction, which is characterized in that the second branch passes through string It connects current transformer two (LH '), breaker two (DL ') and upper cable two (SW ') and is connected to the left end sectionaliser one (FDa) nearby On contact net (T).

5. electric railway AT institute according to claim 2 powered construction, which is characterized in that third branch passes through concatenation electricity Current transformer three (LH "), breaker three (DL ") and upper cable three (SW ") are connected to the contact of sectionaliser two (FDb) right end nearby On net (T).