CN207670427U - Rail traction current imbalance monitors system - Google Patents

Abstract

A kind of rail traction current imbalance monitoring system, including multiple detection extension sets, arrangements for analyzing frequency, the A/D conversion modules of connection arrangements for analyzing frequency and the processing module of connection A/D conversion modules that the detection extension set includes several sensors of acquisition trajectory circuital current, connects sensor；The network switch connects multiple detection extension sets, for networking and receives the signal for detecting extension set and exporting；Monitor terminal, connect the network switch, it receives each current signal and carries out record storage and the inquiry of historical data, the setting of this test device is indoor in signal machinery, using non-electrical sensing contact technology, by collected electric current founding mathematical models, 25HZ electric currents and 50HZ electric currents are obtained by spectrum analysis, 25HZ electric currents are handled and assessed again, and using the 25HZ curent change times as reference, whether see has 50HZ electric currents this moment, then there is risk when there are 50HZ electric currents, and 25HZ electric currents and 50HZ electric currents and interference electric current data are uploaded to terminal in real time to preserve and show.

Description

Rail traction current imbalance monitors system

Technical field

The utility model is related to electric railway field, more particularly to rail traction current imbalance monitors system.

Background technology

Electric railway traction current imbalance is in electric railway electric locomotive traction train traveling process at two The out-of-balance current generated on rail and the choke transformer in offer traction current circuit.The signal of China's electric railway is a large amount of 25Hz phase-sensitive track circuits in station are used, which passes through railway for the case where detecting train occupation track section Interlocking of signals equipment realizes the security control of signal, track switch, route, it is ensured that railway operation safety, the track circuit are China's electricity The major technique equipment of gasification railway.25Hz phase-sensitive track circuits preferably solve orbit occupancy detection and are drawn with locomotive 50Hz The access that electric current returns, since 25Hz track circuits and traction current act on same track section, traction current imbalance will Interference is generated to the normal work of 25Hz track circuits, when drawing out-of-balance current beyond specified value, causes 25Hz tracks electric Road relay malfunction, consequence will produce serious influence to railway operation safety and driving efficiency.

Utility model content

The purpose of this utility model one is to provide a kind of rail traction current imbalance monitoring system, by acquiring 25Hz Track circuit electric current and 50Hz draw out-of-balance current, to play early warning and ensure the effect of railway safety travel.

A kind of rail traction current imbalance monitoring system, including

Multiple detection extension sets, the detection extension set include several sensors of acquisition trajectory circuital current, connection sensor Arrangements for analyzing frequency, connect arrangements for analyzing frequency A/D conversion modules and connect A/D conversion modules processing module；

The network switch connects multiple detection extension sets, for networking and receives the signal for detecting extension set and exporting；

Terminal is monitored, the network switch is connected, each current signal is received and carries out record storage and the inquiry of historical data.

By using above-mentioned technical proposal, the setting of this test device is indoor in signal machinery, using non-electrical sensing contact Collected electric current founding mathematical models are obtained 25HZ electric currents and 50HZ electric currents, then to 25HZ electricity by technology by spectrum analysis Stream is handled and is assessed, and using the 25HZ curent change times as reference, whether this moment have 50HZ electric current, if any 50HZ electric currents if seeing Then there is out-of-balance current that i.e. 50HZ electric currents occur to be incorporated in 25HZ electric currents, judges whether the 50HZ electric currents entered are more than a threshold at this time Value, when more than when then there is risk, and 25HZ electric currents and 50HZ electric currents and interference electric current data are uploaded to terminal in real time It preserves and shows.

Further, each detection extension set detects 32 track circuit receiving terminals, and the work period is 400 milliseconds.

By using above-mentioned technical proposal, the degradation of the live electrical characteristic of each track circuit is detected, and anti- Short, the strong feature of promptness between seasonable.

Further, the monitoring terminal is also connected with a warning device, and the warning device is in response to the interference electric current The alarm signal work that data generate.

By using above-mentioned technical proposal, there is preferable prompt facility.

In conclusion the utility model has the advantages that：In conclusion the utility model has below beneficial to effect Fruit：

1. the acquisition of electric current is indoor in signal machinery, avoids and acquire a large amount of laying signal electricity of needs by track in equipment Cable, investment reduction；

2. acquisition mode is contactless, installation process is avoided to using middle equipment to impact, construction and installation are simply easy Row；

3. system uses high-speed digital video camera technology and embedded computer technology, network structure, monitoring cycle Short real-time, obtained data are completely reliable；

4. using network structure, it is easy to dilatation, it is adaptable to meet the monitoring needs at different size station.

5. providing real-time and history data by this monitoring system for railroad maintenance personnel, carry out accordingly preventative Repair, reaching ensures the good effect of equipment state.

Description of the drawings

Fig. 1 be electric locomotive traction electrically with track circuit relational graph；

Fig. 2 is electric railway traction current imbalance monitoring system pie graph；

Fig. 3 is traction current imbalance monitoring system diagram；

Fig. 4 is traction current imbalance monitoring working-flow figure；

Fig. 5 is to calculate out-of-balance current derivation of equation circuit diagram.

Specific implementation mode

The utility model is described in further detail below in conjunction with attached drawing.

Embodiment 1,

A kind of rail traction current imbalance monitors system, be applied to electric locomotive traction electrically with the company of track circuit It connects, shown referring to Fig.1, when electric locomotive occupies track circuit AG, locomotive obtains traction current from contact net（IQ）Via machine Vehicle pantograph, tractive transformer, train wheel flow to rail item 1, rail item 2 to the end of choke transformer track lateral coil respectively Son 1（I1）With terminal 2（I2）, when I1 is equal to I2, choke transformer signal lateral coil influence electricity stream, indoor noseplate is to anti- There is no 50Hz electric currents between shield box, track relay（i50）, show that traction current is balance.In each portion being connect with rail item 1 Resistance R1, R2, R3, R4 and when each portion's resistance R8, R5, R6, R7 for being connect with rail item 2 unequal so that electric current I1 is not equal to I2, the difference of two electric currents are to draw out-of-balance current, this out-of-balance current is transmitted to indoor shape by track transformer At 50Hz electric currents（i50）, i50 sizes reflect traction out-of-balance current size.Although track circuit BG is without locomotive at this time It occupies, but choke transformer terminal 3 is coupled by middle connecting plate between AG and BG, from leading for AG choke transformers terminal 3 Draw the choke transformer terminal 3 that electric current flows into BG（I’Q）, then respectively the another of BG is flowed to from the choke transformer terminal of BG 1,2 End, it is assumed that the right side of BG is sending end, and left side is receiving end, when receiving end has monitored i50 electric currents, shows that BG has traction electricity Energy imbalance is flowed, but not can determine that the phenomenon that sending end or receiving end become larger there are each portion's resistance；When in locomotive pressure When BG, i50 electric currents become smaller instead, can be judged as that each portion's resistance of sending end has the phenomenon that becomes larger substantially, be the ground of live emphasis inspection Side.

When finding that traction out-of-balance current is big, should check whether plug pin loosens, rail end bond wire and Jumper whether Well, etc. whether line characteristic deteriorates, whether outer nut loosens in 1,2,3 terminal of choke transformer rail side for resistance.

Prison is provided on the circuit diagram that electric locomotive traction is electrically connect with track circuit with reference to shown in Fig. 2 based on this Examining system, the detecting system include several detection extension sets, each detection network switch of extension set of connection, detection terminal and Display

Wherein, each detection extension set is both provided with several sensors, arrangements for analyzing frequency, the A/ of acquisition trajectory circuital current D conversion modules and processing module, and networking is carried out by network switch, it realizes the transmission of signal and is transferred to monitoring Terminal is uniformly processed, which is arranged in track relay, protection box to outdoor tie line position, in this way, by reasonable Sampling position and sampling opportunity are selected, solves transmission difficulty, detection site point caused by usual collecting test signal at the scene It dissipates, the difficulty of inconvenient management service.

Collected electric current is divided into 50Hz electric currents and 25Hz electric currents by connecting the arrangements for analyzing frequency of sensor again, is led to It crosses A/D conversion modules and 50Hz electric currents and 25Hz electric currents be converted into digital signal export to processing module and handle, to sentence Whether disconnected 50HZ interference electric currents occur, and when there are interference electric current, judge whether electric current is more than a threshold value, when more than threshold value, Interference electric current data are generated, also, are packaged and record 25HZ electric currents, 50HZ electric currents and interference electric current data respectively.

Terminal is monitored, the network switch is connected, each current signal is received and carries out record storage and the inquiry of historical data.It is aobvious Show that device will monitor the complete signal of terminal monitoring and display data.

Embodiment 2,

A kind of rail traction current imbalance monitoring method,

S1, pass through the electric current of the real-time acquisition trajectory circuit of current transformer, the acquisition of electric current in signal controlling machine tool room Position is on track relay, protection box to outdoor connecting line.In this way, using the non-electrical way of contact by current transformer The uneven interference electric current of 25HZ electric currents and 50HZ electric currents is detected, in this way, avoiding a large amount of laying signal cables by track, is saved Investment.And 25HZ electric currents and 50HZ electric currents are obtained by current spectrum analysis；

S2, when monitoring 25HZ electric currents at a time mutation electric current, as time reference point, if this when The 50HZ electric currents at quarter are more than a threshold value, then generate interference electric current data；Specifically the method for generation interference electric current data is：With reference to figure Shown in 5, three fundamental formulars according to ideal transformer：

Formula 1：P1=P2

Formula 2：U1/n1=U2/n2

Formula 3：I1* n1=I2* n2

Wherein, P1 is input power, and P2 is output power, and U1 is track transformer primary side voltage, and U2 is track transformation Side voltage, n1 are track transformer primary side turn ratio to device twice, and n2 is track transformer secondary side turn ratio, and I1 becomes for track Depressor primary side current, I2 are track transformer secondary side current；

In conjunction with the turn ratio of circuit relationships and choke transformer and track transformer between transformer and load, derives and lead It is LC series resonant circuits for 50Hz protection boxes to draw out-of-balance current with the indoor electric current for flowing through protection box and track relay, Formula 4 is obtained according to ideal transformer formula 3：

I=(I1* n1) *（1/ n2)

Wherein, i is 50Hz electric currents；

Similarly, the electric current between choke transformer and track transformer obtains formula 5 according to formula 3：

I1=(⊿ I* N1) *（1/ N2)

Wherein , ⊿ I are traction out-of-balance current；

It brings formula 5 into formula 4 and obtains formula 6：

I=n1/n2*N1/N2 * ⊿ I.

Wherein , ⊿ I are traction out-of-balance current；N1 is choke transformer primary side turn ratio, and N2 is choke transformer two Secondary side turn ratio；

Also, threshold value is set as 1, as i ＞ 1, generates interference electric current data.

Formula 6 shows that the electric current for detecting 50Hz indoors can reflect that traction current is unbalanced on outdoor choke transformer Size, relationship are the products of track transformer no-load voltage ratio and choke transformer no-load voltage ratio.

Citing：Actually use situation according to live choke transformer and track transformer, determine transformer voltage ratio n1, N2, N1, N2 are general, and value is：N1, N1 value 1,

N 2=13.45（Since the end a, b is adjustable in Fig. 5, therefore 2 values of n need scene to appraise and decide）

N 2=6

Tetra- numerical value of above-mentioned n1, n2, N1, N2 are substituted into formula 6 and obtain formula 7：

⊿ I=（13.45×6）I=80.7i

Assuming that monitoring i=0.1A Ze ⊿ I=8.07A.

S3, monitoring 25HZ electric currents and 50HZ electric currents and interference electric current data are respectively sent to terminal in real time.

This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability Field technique personnel can as needed make the present embodiment the modification of not creative contribution after reading this specification, but As long as all being protected by Patent Law in the right of the utility model.

Claims (3)

1. a kind of rail traction current imbalance monitors system, it is characterised in that：Including

Multiple detection extension sets, the detection extension set include several sensors of acquisition trajectory circuital current, connect the frequency of sensor Spectrum analysis device, the A/D conversion modules for connecting arrangements for analyzing frequency and the processing module for connecting A/D conversion modules；

The network switch connects multiple detection extension sets, for networking and receives the signal for detecting extension set and exporting；

Terminal is monitored, the network switch is connected, each current signal is received and carries out record storage and the inquiry of historical data.

2. system according to claim 1, it is characterised in that：Each detection extension set detects 32 track circuits and receives End, work period are 400 milliseconds.

3. system according to claim 1, it is characterised in that：The sensor is current transformer.