CN202041610U

CN202041610U - Electromagnetic induction fault positioning equipment of AT (Autotransformer) power supply traction electric network

Info

Publication number: CN202041610U
Application number: CN2011200865060U
Authority: CN
Inventors: 林圣�; 何正友; 钱澄浩; 胡海涛; 吴双
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2011-03-28
Filing date: 2011-03-28
Publication date: 2011-11-16
Anticipated expiration: 2021-03-28

Abstract

The utility model discloses electromagnetic induction fault positioning equipment of an AT (Autotransformer) power supply traction electric network, which is characterized in that a traction electric network rod tower in an AT power supply mode is provided with an electromagnetic induction fault positioner (1), a traction power substation is provided with a remote terminal computer (2) with a GSM (Global System for Mobile Communication) signal receiving module, the electromagnetic induction fault positioner consists of an electromagnetic induction coil (11), a voltage amplifying circuit (12), a single chip computer (13) and a GSM signal transmitting module (14) which are sequentially connected, and the voltage amplifying circuit (12), the single chip computer (13) and the GSM signal transmitting module (14) share a power supply (15). The equipment has low installation and operation cost, high positioning accuracy and quick positioning speed, and better ensures that a motor vehicle can safely, reliably and efficiently operate.

Description

A kind of electromagnetic induction FLU Fault Location Unit of AT power supply traction network

Technical field

The utility model relates to the method for tractive power supply system traction net localization of fault, is specially the traction network fault positioning method that a kind of contactless electromagnetic induction measures.

Background technology

Along with the high speed of China railways, the fast development of heavy loading, the AT power supply mode is because advantage such as power supply distance is long, the voltage loss of traction net is little and antijamming capability is strong extensively is subjected to the favor of domestic and international high-speed railway.On the basis of multiple line AT power supply mode, with up-downgoing draw net in the traction substation outlet a shared isolating switch, and osculatory, rail and the positive feeder of up-downgoing traction net all are together in parallel by the horizontal-associate line object at all AT, are full Parallel AT power supply mode.Compare the AT power supply mode, the current capacity of the circuit of full Parallel AT power supply is stronger, electromagnetic pollution is littler, at present at the nearly all Line for Passenger Transportation of China and inter-city passenger rail all by full Parallel AT power supply mode design, with adapt to the tractive power supply system output power greatly, the segment length of service area, needs that reliability requirement is high.But more complicated in the full Parallel AT power supply mode wiring, and osculatory is exposed is erected at directly over the rail, insulator long term exposure be in atmospheric environment, is subjected to the pollution of air and insulating property are reduced, and causes drawing the netting twine Louis fault that is short-circuited.Characteristics at full Parallel AT power supply mode, contact fault distance-finding method such as existing " sucting current ratio ", " horizontal line current ratio ", need the contact checkout equipment be installed to gather the corresponding magnitude of current, voltage at AT institute, section post, but this spline span is big (about 50km), and the measuring accuracy of fault distance does not often reach requirement.In recent years, the travelling wave ranging technology begins to be applied to the tractive power supply system localization of fault, but the frequency change effect of the uncertainty of travelling wave signal and parameter often causes the extraction of travelling wave signal and handles very difficult; In addition, owing to the different monitoring points time can not precise synchronization, existing communication network can not the bulk transfer fault data etc. reason make on the travelling wave ranging localization method principle feasiblely, but be difficult in actual applications realize.

The utility model content

The purpose of this utility model just provides a kind of electromagnetic induction FLU Fault Location Unit of AT power supply traction network, and the installation and operation cost of this equipment is low, and setting accuracy height, locating speed are fast, can guarantee the safe, reliable and efficient of locomotive operation better.

The utility model is that the technical scheme that its goal of the invention of realization is adopted is, a kind of electromagnetic induction FLU Fault Location Unit of AT power supply traction network, and its composition is:

The electromagnetic induction fault locator is installed, at the remote terminal computing machine of traction substation mounting strap GSM signal receiving module on the traction net shaft tower of AT power supply mode; Described electromagnetic induction fault locator is linked to each other successively with the GSM signal emission module by electromagnetic induction coil, voltage amplifier circuit, single-chip microcomputer and constitutes, and the shared power supply of voltage amplifier circuit, single-chip microcomputer and GSM signal emission module.

Use FLU Fault Location Unit of the present utility model as follows to the method that the AT power supply traction network carries out localization of fault:

1) voltage signal acquisition: the electromagnetic induction fault locator is installed on the shaft tower of 0.5～1km at the AT power supply traction network, respond to the horizontal component in the magnetic field of traction net electric current generation in real time by the electromagnetic induction coil of steady arm, and be converted into voltage signal, after amplifying, voltage amplifier circuit imports single-chip microcomputer again;

2) voltage signal is differentiated: single-chip microcomputer is differentiated the voltage signal of input, when surpassing, the voltage signal of importing sets threshold values, and its duration has exceeded setting-up time, and the traction net of then judging this steady arm position fault that is short-circuited is sent the fault pre-alarming signal;

3) early warning signal sends and handles: after single-chip microcomputer sends the fault pre-alarming signal, the GSM synchronizing signal transmitter module of steady arm is uploaded to the remote terminal computing machine with the attribute information of fault pre-alarming signal and steady arm place shaft tower, demonstrates the position that fault takes place by the remote terminal Computer Analysis.

Compared with prior art, the beneficial effects of the utility model are:

One, bearing accuracy height.Because steady arm adopts electromagnetic induction coil that the traction net is carried out the non-contact type current signal fault and detects, therefore steady arm can be installed on the shaft tower of traction net, thereby the installation interval that makes steady arm is reduced into 0.5～1km by the 50km spacing of existing electric substation, the detection spacing is dwindled greatly, obviously improved the short trouble bearing accuracy of traction net.

Two, locating information is accurate.Steady arm will surpass the input signal of setting-up time above threshold values and duration, just be judged to be check point short trouble has taken place, thereby instantaneous various undesired signals are got rid of.The fault-signal that sends accurately, reliably.

Three, locating speed is fast.After steady arm detects fault-signal, in time failure message is uploaded to real-time, the accurate in locating that remote computer is realized traction net failure message by the gsm wireless transmission mode, thereby can be in time, take measures accurately, guarantee the safety of train operation and reliable.Failure message by the terminal computer demonstration, the maintainer also can find the position of fault fast and get rid of, save the manpower and materials of trouble-shooting point in large quantities, alleviate the labour intensity of railway power supply maintenance department, can fix a breakdown as soon as possible and restore electricity, improve the efficient of train operation, reduce because the loss that has a power failure and cause.

Four, steady arm is made of electromagnetic induction coil, voltage amplifier circuit, single-chip microcomputer, GSM signal emission module, and it is simple in structure, and is reliable, and the cost of entire equipment installation and operation is low; Steady arm is installed on the shaft tower of contact net, does not directly contact with osculatory, can the normal operation of locomotive not had any impact.

Above-mentioned power supply is the sun-generated electric power of solar panel, solar charging controller, accumulator formation.

The power supply of employing sun-generated electric power is not drawn electricity from osculatory, need not high pressure (27.5kv) step-down equipment, has both greatly reduced cost, has guaranteed the safety of steady arm again, has avoided adopting other powered battery need change the trouble of battery at any time simultaneously yet.

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Description of drawings

Fig. 1 is the one-piece construction synoptic diagram of the utility model embodiment;

Fig. 2 is the circuit structure block diagram of the steady arm of the utility model embodiment;

Fig. 3 is the circuit structure block diagram of power supply of the steady arm of the utility model embodiment;

Embodiment

Fig. 1, Fig. 2 illustrate, and a kind of embodiment of the present utility model is, a kind of electromagnetic induction FLU Fault Location Unit of AT power supply traction network, and its composition is:

Electromagnetic induction fault locator 1 is installed, at the remote terminal computing machine 2 of traction substation mounting strap GSM signal receiving module on the traction net shaft tower of AT power supply mode; Described electromagnetic induction fault locator is linked to each other successively with GSM signal emission module 14 by electromagnetic induction coil 11, voltage amplifier circuit 12, single-chip microcomputer 13 and constitutes, and voltage amplifier circuit 12, single-chip microcomputer 13 and GSM signal emission module 14 shared power supplys 15.

Fig. 3 illustrates, and this routine power supply 15 is the sun-generated electric power that solar panel 15A, solar charging controller 15B, accumulator 15C constitute.

Adopt this routine FLU Fault Location Unit as follows to the method that the AT power supply traction network carries out localization of fault:

1) voltage signal acquisition: electromagnetic induction fault locator 1 is installed on the shaft tower of 0.5～1km at the AT power supply traction network, draw the horizontal component in the magnetic field of net electric current generation by electromagnetic induction coil 11 induction in real time of steady arm 1, and be converted into voltage signal, after amplifying, voltage amplifier circuit 12 imports single-chip microcomputer 13 again;

2) voltage signal is differentiated: the voltage signal of 13 pairs of inputs of single-chip microcomputer is differentiated, when surpassing, the voltage signal of importing sets threshold values, and its duration has exceeded setting-up time, and the traction net of then judging this steady arm 1 position fault that is short-circuited is sent the fault pre-alarming signal;

The setting threshold values of single-chip microcomputer 13 is generally 3 times of mean value under this steady arm normal condition, and setting-up time is generally 20ms.

3) early warning signal sends and handles: after single-chip microcomputer 13 sends the fault pre-alarming signal, the GSM synchronizing signal transmitter module 14 of steady arm 1 is uploaded to remote terminal computing machine 2 with the attribute information of fault pre-alarming signal and steady arm 1 place shaft tower, is analyzed by remote terminal computing machine 2 and demonstrates the position that fault takes place.

Claims

1. the electromagnetic induction FLU Fault Location Unit of an AT power supply traction network, its composition is:

Electromagnetic induction fault locator (1) is installed, at the remote terminal computing machine (2) of traction substation mounting strap GSM signal receiving module on the traction net shaft tower of AT power supply mode; Described electromagnetic induction fault locator (1) is by electromagnetic induction coil (11), voltage amplifier circuit (12), single-chip microcomputer (13) and GSM signal emission module (14) link to each other successively formation and voltage amplifier circuit (12), single-chip microcomputer (13) and the shared power supply of GSM signal emission module (14) (15).

2. the electromagnetic induction FLU Fault Location Unit of a kind of AT power supply traction network according to claim 1, it is characterized in that described power supply (15) is the sun-generated electric power of solar panel (15A), solar charging controller (15B), accumulator (15C) formation.