JPH0970101A - Monitoring device for protecting electric equipment from grounding for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an erroneous operating method when a vehicle is grounded by transmitting the information that a circuit breaker is reclosed without eliminating the cause for the occurrence of grounding to a central operation control system. SOLUTION: The state of electronic equipment 16 is always inputted to a monitoring terminal 15 and a central monitoring device 14 can collect the information of each monitoring terminal 15 and make the information to be displayed on the displaying section of the device 14, according to need. In addition, the device 14 can individually command each terminal 15 to wait for a communication function. When the equipment 16 of a low-voltage circuit is grounded due to some trouble, a vacuum circuit breaker detects the grounding and starts operation and, at the same time, the terminal 15 of each vehicle detects the grounding and transmits the information about the grounding to the central device 14. The central device 14 breaks the electric circuit of the unit, based on the received information. Therefore, the output of an auxiliary power unit 5 is also stopped. Although each equipment 16 is provided with a circuit breaker for wiring, the vacuum circuit breaker operates prior to the circuit breaker for wiring due to its operating characteristic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to protection of electric circuits of railway vehicles, and more particularly to a protection operation display and a treatment support function when an electric equipment is grounded.

[0002]

2. Description of the Related Art Conventionally, a railway vehicle has been a system in which main circuit power is supplied from an overhead line, and the main circuit power is stepped down by a transformer to supply it to electrical parts. In this system, the circuit breaker is operated and the operation of the circuit breaker is displayed on the cab monitor.

[0003]

Although the ground contact is detected and displayed on the monitor as described above, only the ground contact is displayed, and the subsequent treatment method is performed in the form of instruction to the crew. Was there.

It is an object of the present invention to display a message on the operator's cab monitor that the electric equipment should be circuit-isolated and the circuit breaker should be closed again when the electric equipment is grounded. It is to prevent train control failure by making a system in which the operation method error can be prevented or the circuit breaker cannot be reclosed in an electric circuit unless the cause of grounding is eliminated. Another object of the present invention is to provide a substitute vehicle preparation request function that issues a warning to temporarily stop the vehicle at the nearest station before the vehicle in which the circuit breaker is re-closed becomes uncontrollable without eliminating the cause of ground contact.

[0005]

[Means for Solving the Problems] In order to solve this,
When grounding an electrical device, disconnect the relevant electrical device and then display the circuit breaker on the driver's cab so that the circuit breaker can be turned on again to prevent an error in the operation method when a ground occurs or to prevent the cause of the ground from occurring. The system will not allow the circuit breaker to be turned on again unless it is eliminated. It also informs the train operation management system that the circuit breaker has been re-closed without eliminating the cause of ground contact, and issues a warning to temporarily stop at the nearest station before the vehicle becomes uncontrollable or an alternative vehicle The system will have a function that allows the preparation request to be made via the train operation management system.

[0006]

With this, the power supply of the corresponding unit can be restored, and the electric devices other than the corresponding device can operate normally. Even if the crew does not operate according to the instructions, there is no possibility of erroneous operation because the system does not allow the electric circuit to be turned on again. Furthermore, even if the circuit breaker can be turned on again without removing the cause of grounding due to some trouble, the train operation management system is informed of the possibility that train control may be lost, and the train may be closed before it becomes uncontrollable. It is possible to prevent getting stuck on the line by issuing a warning to temporarily stop at the station or providing a function to request the preparation of an alternative vehicle via the train operation management system.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an electric circuit system of a vehicle. The power is received from the overhead wire by the pantograph 1, taken into the main transformer 4 via the protective grounding switch 2 and the vacuum circuit breaker, and stepped down to a predetermined low voltage so as to be supplied as a power source for electric equipment such as an air conditioner. The low voltage circuit further includes an extremely low voltage circuit such as AC100V and DC100V via the auxiliary power supply device 5, and a circuit such as a fluorescent lamp is attached. The DC100V circuit is a power source for train control. FIG. 2-4 is a diagram showing an embodiment of the present invention, and FIG. 2 shows an overall system of the present invention. 17 is a leading vehicle, 18 is an intermediate vehicle, and 16 is a low voltage mounted on each vehicle. The electrical equipment of the circuit, 15 is a monitor terminal device that collects the ground information of the electrical equipment, and 14 is a central monitor device that receives the ground information of the monitor terminal device and transmits the information to the train operation management system. Electrical equipment 1
The state 2 is always input to the monitor terminal device 15, and the monitor central device 14 collects the information of each monitor terminal device 15 and displays it on the monitor central device display section as necessary, and also separately from each monitor terminal device 15. It has a communication function and can give commands.

Next, the operation when the electric device 16 is grounded will be described with reference to FIG. When the electrical equipment 16 of the low-voltage circuit is grounded due to some trouble, the vacuum circuit breaker 3 operates by detecting the grounding, the monitor terminal 15 of each vehicle detects the equipment grounding, and transmits the information to the monitor central unit 14. .
Since the monitor central unit 14 shuts off the electric circuit of the corresponding unit based on the received information, the output of the auxiliary power unit 5 is also stopped. Although the circuit breaker 6 for wiring is also provided in each of the electric devices 16, the vacuum circuit breaker 3 operates first because it is a fast-moving type because of its operating characteristics.

Next, FIG. 3 shows an example of division of an electric system unit of a vehicle and a recovery procedure according to the present invention when an electric device is grounded. The procedure is described here assuming that grounding occurred in No. 3. No. 3 unit displays grounding and the vacuum circuit breaker has operated (S1) on the central device of the monitor of the lead car, and when the grounding device is disconnected next, the "Disconnecting grounding device" display (S3) lights up. To do. If these steps are executed, the vacuum circuit breaker can be reclosed, so the "No. 3 unit vacuum circuit breaker reclosed" display (S4) is lit, and if the vacuum circuit breaker is reclosed normally, "return confirmation is confirmed. The display (S5) is turned on. On the other hand, in the conventional case, when grounding occurs and the vacuum circuit breaker 3 operates, the wiring breaker of the corresponding device is turned off and the vacuum circuit breaker is turned on again while the ground circuit is disconnected. Although the power is restored, it will be described with reference to FIG. 1 that train control becomes inoperable if the power guiding operation is performed without eliminating the grounding cause.

When power supply induction is performed without disconnecting the grounding cause, extended power is automatically supplied from the adjacent unit, but since the grounding circuit remains, the vacuum circuit breaker 3 of the adjacent unit also operates and the auxiliary power supply unit 5 stops. . When the vehicle is driven with the auxiliary power supply units 5 of the plurality of units stopped in this way, the auxiliary power supply units 5 of the remaining living units need to supply power to all the vehicles. Then, the power consumption of the DC 100V circuit for charging the battery increases, and the breaker for battery protection operates due to overcurrent.
In this state, the DC100V circuit cannot be used,
The notch cannot be operated.

In order not to entrust the operation of the vacuum circuit breaker 3 to the judgment of the crew, the display indicating that the vacuum circuit breaker 3 of a certain unit has been operated is displayed on the monitor central device display portion, as shown in FIG. The recovery procedure as shown in is also displayed. That is, it indicates that the vacuum circuit breaker 3 of a certain unit has operated, and when the crew member turns off the wiring circuit breaker 6 of the relevant device, "Disconnect the grounding device" is displayed, and then the vacuum circuit breaker 3 is normally restarted. When it is turned on, a "return confirmation" is displayed. This is related to the protection circuit shown in FIG. FIG. 4 shows a fail-safe recovery procedure when the electric device 16 is grounded. The circuit breaker 6 for wiring is provided on the power circuit of the electric device 16, and the auxiliary contact of the circuit breaker 6 for wiring is provided. NC (Normally Close) is on the control circuit. The coil of the failure reset switch 10 is provided downstream of the auxiliary contact, and the auxiliary contact of the failure reset switch 10 is provided downstream of the vacuum circuit breaker 3. When grounding occurs, by turning off the wiring breaker 6 of the device, the NC contact of the wiring breaker 6 is closed, the coil of the failure reset switch 10 is excited, and the auxiliary contact of the failure reset switch 10 is closed. The circuit of the power supply wiring breaker 11 is alive. In the series of operations, the circuit is configured to display "disconnection of the grounding device" and "return confirmation" in response to the circuit breaker 6 being turned off and the vacuum circuit breaker 3 being turned on.

If the wiring breaker 6 of the grounding device is accidentally turned off
If FF is not performed, the NC contact of the circuit breaker 6 for wiring remains open, so the failure reset switch 10 is not excited, and the circuit of the circuit breaker 11 for power supply induction is still open, so it cannot be reclosed and is mechanically failsafe. Becomes

In the unlikely event that the circuit breaker 6 for wiring or the failure reset switch 10 fails for some reason and the circuit breaker 11 for power supply induction can be reclosed without accidentally disconnecting the grounding cause, the adjacent unit Since the vacuum circuit breaker 3 operates instantly, this is detected by the monitor terminal unit 15 of the vehicle, and the monitor central unit 14 receives the information. Upon receiving this information, the monitor central unit 14 transmits the information to the train operation management system 12 so as to notify that there is a vehicle that may be incapable of running, and at the same time, via the train operation management system 12 Display the alternative train preparation request on the terminal of the operation management system at the train station and the driver station. Specifically, the monitor central unit 14 counts the number of vacuum circuit breaker motion differences in the train, and automatically transmits information to the train operation management system 12 by communication during the second operation. Based on this information, the train operation management system 12 communicates with the operation management system terminals of each car station and the driver's station to find the car station and driver's station near the running section of the train and request the spare car preparation request on the terminal screen. It has a function to display.

[0014]

As a result, it is possible to prevent the former from being out of control. Further, even if the vacuum circuit breaker 3 can be turned on again without eliminating the cause of grounding due to some trouble, it is possible to prevent the train from running on the route and causing a large confusion of timetables.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an auxiliary circuit system according to an embodiment of the present invention.

FIG. 2 is a system block diagram of an embodiment of the present invention.

FIG. 3 is a diagram showing an example of division of units and a grounding processing flow.

FIG. 4 is a connection diagram between a control circuit and a power circuit according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pantograph, 2 ... Protective earthing switch, 3 ... Vacuum breaker, 4 ... Main transformer, 5 ... Auxiliary power supply, 6 ... Wiring breaker, 12 ... Electric equipment, 14 ... Monitor central unit, 15 ... Monitor terminal , 16 ... Electrical equipment of low voltage circuit, 17 ... Leading vehicle, 18 ... Intermediate vehicle.

Claims (3)

[Claims] 1. A ground protection monitor for a vehicle, wherein in a vehicle in which grounding is occurring, the fact that the circuit breaker is reclosed without eliminating the cause of grounding is transmitted to the central operation management system as information. apparatus. 2. A function according to claim 1, which has a function to warn that the vehicle in which the circuit breaker is re-closed without eliminating the cause of the ground contact may lose train control, will be temporarily stopped at the nearest station. A grounding protection monitor device for a vehicle. 3. The vehicle according to claim 1, wherein the vehicle in which the circuit breaker is re-introduced without eliminating the cause of ground contact prepares an alternative vehicle in preparation for a temporary stop at the station closest to the vehicle through the train operation management system. A grounding protection monitor device for a vehicle, which has a function of contacting each vehicle place and a driver's place.