JPH01164673A - Train position display device - Google Patents

Abstract

PURPOSE:To improve the work efficiency at the time of the maintenance work by providing the measuring device of the inflow current value on each autotransformer in each feeder section, calculating the existing position of a train based on the inflow current value in front and back of the train existing section, and displaying the result on the display board in a transformer station. CONSTITUTION:In a transformer station 1 installed at a distance of about 100km and feeding power to a train, a trolley line 3 in contact with the pantograph of a train 8 and a feeder line 5 are connected to its transformer 2, autotransformers 6n, 6n+1... are provided at the distance of about 10km on the lines 3 and 5, the neutral point of the autotransformer and a rail 4 are connected with a neutral line. Current transformers 7n, 7n+1... to measure the inflow current value to an autotransformer 2 from the rail 4 are provided on the neutral line in this feeder circuit. Output signals of the current transformers are sent to an arithmetic unit 14 via converters 9n, 9n+1... and data transmitters 10n, 10n+1..., the train position is calculated here based on the current values from various places, and the result is displayed on a display device 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Industrial Field of Application) The present invention relates to a device for displaying the position of a train on an electric railway using an alternating current feeding (AT feeding) system.

(Conventional technology) When a train malfunction occurs that causes a short circuit or ground fault,
Alternatively, when performing maintenance on power equipment and equipment at a substation during the day or at night, maintenance personnel waiting at the substation can check the current location of the train by calling the command center by telephone, etc. After understanding the situation, they go to the site and start work.

Conventionally, a CTC (central train control unit) has been used as a system for displaying train positions when it is provided.

CTC divides the track on which trains run in a certain section to insulate it from electric signals, and by directly displaying the presence or absence of trains in that section at the central control center, it centralizes course setting and operation management of train groups. However, as is well known, it is a very expensive system. For this reason, CTC is used for Shinkansen trains, etc., which have a high train operation density, are mainly intended for passenger-oriented transportation, and require a high degree of reliability, and can be profitable, but CTC is used mainly for freight transportation and has a high operation density. It is difficult to introduce such an expensive system on low-density routes, where only a few dozen trains run per day, as it is not profitable.

In such a case, in order for on-site maintenance personnel to know the train's location, the dispatcher must rely on information from the train radio and railway telephones from each station, check the train's position by comparing it with the operating schedule, and then contact the maintenance personnel over the railway telephone. .

(Problem to be solved by the invention) However, in this method, the dispatcher confirms and communicates the train's position based on the information via train radio, railway telephone, etc., so it takes time to provide information on the train's position, and it is difficult to communicate with the dispatcher. This can lead to dangerous situations, such as when maintenance personnel go to the site and fail to find the faulty train, or when attempting to maintain equipment, the last train has not yet passed due to a disruption in the timetable. there were.

In order to solve this problem, maintenance personnel who are always on standby at each substation can check the train position without relying solely on information from the dispatcher.By installing a device, maintenance personnel themselves can quickly and accurately check the train position. It is necessary to be able to know the location.

[Configuration of the Invention (Means for Solving Problems) -a) When a train has a fault such as a short circuit or a ground fault in the AT feeding circuit, the inside of the autotransformers on both sides of the fault point is There is a linear relationship between the ratio of each sucking current value at the sexual point and the distance.

Using these relationships, the substation is equipped with a calculation device that measures the above-mentioned current values before and after the section where the train is currently located, calculates the position of the train from this data, and a display panel that displays the results. put.

(Operation) The arithmetic unit constantly calculates the train position and displays the result on the display panel, so maintenance personnel can know the train position at any time.

(Example) FIG. 1 shows an embodiment of the present invention.

Substations 1 for supplying power to trains are provided at intervals of about 100i. Trolley wires 3 and 5 in contact with the pantographs of trains 8 are connected to the transformer 2 of the substation, and autotransformers L+1, etc., are installed at intervals of about 10-1 between these lines, and these autotransformers The neutral point of the vessel and the rail 4 are connected by a neutral wire. This is a feeding circuit called the AT feeding system.

In this feeding circuit, current transformers -7°+, . Further, converters 9 n, 9 input this measured value, convert it into an electrical signal, and constantly output the information.
n+1... and the data transmitting device 10 connected thereto. ,
ioo+t... is provided. Meanwhile, timer 1 at the substation
1, so that at regular intervals, for example, at intervals of several tens of seconds,
A read signal is sent to the data transmitting device 10 via the communication line 12.
゜, io, , 1 . The arithmetic unit 14 calculates the train position from the current value from each point, blinks indicator lights arranged in a straight line according to the presence of the train, or displays the position from the starting point on a digital display, etc. It is displayed on the device 15.

The relationship between the train position and the sucking current value is as follows. Autotransformer6. and the distance between the autotransformer 6fi+8. , autotransformer6. , and an autotransformer 60. The suction current ratio of H
,,(%), Let the distance from autotransformer 6□ to the location of the train be Xyu, and current transformer 7. , the suction current value is 1. ,
Current transformer7. Let the suction current value of
(see figure) and −〇. +(100-Q, -Q, +t)
-・・・・・・(1) L.

Here, Q, , Qo+1 are constants determined from an artificial ground fault test. From this equation, the train location X is determined by:

Here, when the train 8 is running in FIG. 1, the current that drives the motor when traveling, the current that operates the auxiliary equipment when coasting or braking, etc. are constantly flowing, so the current transformer 1□,
If there is a train in 7a+1, a suction current flows through it. When the current value from the data transmitting device is integrated into the arithmetic device based on the read signal from the timer, the arithmetic device calculates the train position according to the flowchart of FIG.

That is, when the arithmetic unit 14 receives a call signal from the timer 11 through the communication line 12, it receives the call signal from all the data transmitting apparatuses 101, 10, 10, 10, etc. connected to the signal line 13 via the signal line 13. Current value ■. , ■, +1 are input. Of these current values, the calculation device 14 knows the existing section ([.) from the result of calculating the previous train position (step A), so it calculates the current values on both sides of the existing section corresponding to this section. Current value 1+++1, Ia+□ on both sides sandwiching the value (1,,1,,,) and the section one section ahead
Search from the collected data (step B), current value! ,
+! . Judging from the total values of Y1 + L+1 +1.2, whether the current train exists in the same section as the previous one, or whether it has entered the next section in the - section, is determined based on the size of the total value (step CAL). ,■.+I n+1
>i. +, + I, +, if not, advance the section where the train exists by one (step D), and if this inequality holds, the train will be in the 0th order existing in the same section, O,, O corresponding to the section.
Step E of extracting the n+1, wrinkle value from the file
), the distance from the starting point of the existing section is calculated from equation (2) (step F), and the result is output to the display device (step G).

For example, a display device can be installed on a switchboard in a substation to indicate the location of a train by flashing the lamp.
By using methods such as digital display, it can be displayed at low cost and without requiring special space.

[Effects of the Invention] The information that conventionally the dispatcher confirmed the location of the train using the train radio or railway telephone can be directly displayed to the maintenance staff and workers at the substation.

As a result, when a train accident occurs or when maintenance work is to be performed after a train has passed, the train's location can be immediately confirmed at the substation, improving work efficiency and preventing accidents caused by communication errors.

[Brief explanation of the drawing]

1113 is a schematic configuration diagram of the train position display device according to the present invention, FIG. 2 is a characteristic diagram showing the relationship between the train position and the sucking current value, and FIG. 3 is a flowchart for calculating the train position. 1... Substation 3... Trolley wire 4-...
Rail 5-...Feeder line 6゜, 6m+1...
・・・Autotransformer 7n, Yayabi・・・Current transformer

Claims (1)

[Claims] In an electric railway where power from a substation is supplied through a feeding circuit using an AC feeding system using autotransformers, each autotransformer in each feeding section has a sinking current value. The substation is characterized by being equipped with a measuring device, a calculation device that calculates the position of the train from the sucked current values before and after the section where the train is present, and a display panel that displays the train position as a result of the calculation. A train position display device.