JP2521699B2 - DC electric railway feeder system - Google Patents

Description

The present invention relates to a feeding system for a DC electric railway.

[Prior Art] In a feeder system of a DC electric railway, feeder lines are normally fed in parallel from two adjacent substations, but two transformers are used for the purpose of reducing the range of power failure when an accident occurs. In some cases, there will be a separate feeding switchyard in the middle of the place. That is, as shown in FIG. 2, a feeder system having a divided feeder switchyard is a train that is fed in parallel from an adjacent substation (not shown) and has a pantograph 2 on a line 1. The feeder lines 4 and 5 for feeding to 3 and one feeder section 6 provided between these feeder lines 4 and 5 and the feeder section 6 connected in parallel to the feeder section 6 It is equipped with one piece of section switch 7 which can freely bridge.

In this way, when protected by one feeder section 6 and one section switch 7, if a short-circuit accident 8 occurs on the feeder wire 5 on one side of the feeder section 6, the following occurs. . When the electric train 3 enters the feeding section 6 when the division switch 7 is opened, the pantograph 2 of the electric train 3 is established and the electric section 6 is bridged. When bridged, a short-circuit current flows from the feeder line 4 that is being fed by the substation to the feeder section 6, feeder line 5, and short-circuit accident 8 that are bridged by the pantograph 2, destroying the feeder section 6. Will end up. This phenomenon is called section over.

Therefore, as shown in FIG. 3, two feeder sections 6a, 6b and three section switches 7a, 7b, 7c are installed and protected. When the short circuit accident 8 occurs and the division switch 7a opens, the division switch 7b is opened in conjunction to allow the train 3 to enter the car section 6b and bridge the electric section 6b by the pantograph 2. , Kiden section 6a
Since it is not bridged, the short circuit current due to the voltage of the electric wire 4 does not flow. In addition, train 3 has advanced further and electric section 6a
Even if you enter into the pantograph 2 and bridge the power section 6a, the power section 6b is not bridged.
The short circuit current due to the voltage does not flow. Therefore, the feeding section 6a, 6b is not destroyed by the section over. Japanese Patent Application Laid-Open No. 56-79032 relates to this.

[Problems to be solved by the invention]

Although the above-mentioned conventional technology is effective in preventing damage to the feeder section due to section over, no consideration is given to the fact that the number of feeder sections and the number of classification switches increase, and these facilities are Requires frequent maintenance. Therefore, there is a problem that the time and cost required for maintenance increase.

The present invention has been made in view of this, and an object of the present invention is to sufficiently destroy a feeder section due to a section over without increasing the number of feeder sections and the number of section switches used therein. It is an object of the present invention to provide a feeding system for a DC electric railway of this kind, which can be prevented and the time and cost required for these maintenances can be reduced.

[Means for Solving Problems] That is, the present invention is provided between a feeder line that is fed in parallel from an adjacent substation and that feeds a train through a pantograph of the train, and between the feeder lines. It is equipped with a feeder section and a section switch connected in parallel to this feeder section for bridging and opening the feeder section.When the feeder is abnormal, the section switch is opened to prevent the section over the feeder section. In the feeding system of the DC electric railway designed to be prevented, the feeding section provided between the feeding wires is formed as one place, and the division switch provided in the feeding section is formed as one piece. At the same time, a voltage detection device for detecting the presence or absence of voltage is provided on each feeder line divided by the feeder section, and the running position of the train is detected on the train track. A train position detection device is provided, and from the train position signal of the train position detection device and the voltage presence / absence signal of the voltage detection device to the feeder line on the voltage side without the pantograph of the train bridging the feeder section. A feeding control device for stopping feeding is provided to achieve the intended purpose.

[Action]

That is, in the feeder system of the DC electric railway formed in this way, each feeder line divided by the feeder section is provided with a voltage detection device for detecting the presence or absence of a voltage, and the feeder line is Is provided with a train position detecting device for detecting the traveling position of the train, and within a range where the pantograph of the train does not bridge the feeder section from the train position signal of the train position detecting device and the voltage presence / absence signal of the voltage detecting device. Since the feeding control device for stopping feeding to the feeding line on the voltage side is provided, the feeding stop signal is detected by the train position detecting device before entering the feeding section of the train, and In the event of an accident, the feeder on the voltage side is stopped, so even if there is only one feeder section, the feeder from the feeder is short-circuited via the pantograph to the feeder on the accident side. No current will flow, so it is possible to prevent damage to the feeder section due to a section over without the need to install many feeder sections as in the past, and reduce the time and cost required for maintenance of these. It can be reduced.

〔Example〕

Hereinafter, the present invention will be described based on the illustrated embodiments.
FIG. 1 shows an embodiment of the present invention. The same parts as those in the related art are denoted by the same reference numerals, and the description thereof will be omitted.
In the present embodiment, in order to prevent a section over of the feeding section 6 by one feeding section 6 and one division switch 7 when the feeding wire 5 on one side of the feeding wires 4 and 5 is short-circuited. Formed like. That is, a voltage detection device that detects the presence or absence of voltage on each feeder 4 and 5 in the system, a train position detection device 9 that is provided at a predetermined position on the track 1 and that detects the traveling position of the train 3, and these train position detection devices. 9 and a voltage detecting device, and the feeder wire on the voltage side before the pantograph 2 of the train 3 bridges the feeder section 6;
In this case, it is formed with a control unit that stops feeding to the feeder line 4 side. Then, DC voltage transformers 10a and 10b provided with voltage detection devices on both sides of the division switch 7, and voltage relays 1 connected to these DC voltage transformers 10a and 10b, respectively.
It was formed with 1a and 11b. In addition, the control unit is connected to the voltage relays 11a, 11
b and the control device 12 connected to the train position detection device 9,
A transmission device 14a, 1 provided with communication lines 13a, 13b respectively connected to both sides of the control device 12 and for respectively communicating with adjacent substations.
Formed with 4b. By doing so, the voltage on both sides of the feeder section 6 is detected by the DC instrument transformers 10a, 10b and the voltage relays 11a, 11b. The approach of the train 3 to the feeder section 6 is detected before the train position detecting device 9 enters the train section 6. Then, these detected signals are input to the control device 12, the output stop signal of the output causes a short circuit accident 8 on the feeder line 5, and the presence of voltage on the feeder line 4 is detected. It is transmitted to the substation on the feeder line 4 side through 13b, and feeding to the feeder line 4 on the side with voltage is stopped (when a short circuit accident occurs on the feeder line 4 side, the section switch 7 is opened, Since the feeder 5 is detected to have a voltage, the feeder stop signal is transmitted by the transmission device 14a to the substation on the feeder 5 side via the communication line 13a).

That is, when a short circuit accident 8 occurs on the feeder 5, the section switch 7 is opened, and the substation on the feeder 5 side that is feeding the feeder 5 also stops feeding. It becomes a voltage. When the train position detecting device 9 detects the approach of the train 3 to the feeder section 6, the control device 12 controls the feeder line 4 side feeding the feeder line 4 via the transmission device 14b and the communication line 13b. Sending a stop signal to the substation,
Stop feeding the feeder line 4 so that there is no voltage.

Thus, according to this embodiment, the pantograph 2 of the train 3
Since the breakdown of the feeder section 6 due to the section over which bridges the feeder section 6 can be avoided, one feeder section 6 and one section switch 7 can be used to feed Protection with section 6 is possible. Since the number of feeder sections 6 and the number of division switches 7 can be reduced in this way, the maintenance time and cost required for these feeder sections 6 and division switches 7 can be greatly reduced. .

〔The invention's effect〕

As described above, according to the present invention, even if there is only one feeder section and one section switch, feeding of the feeder line on the voltage side is stopped before the feeder section enters the feeder section. Therefore, the short-circuit current does not flow, and therefore it is possible to prevent the breakdown of the feeder section due to the section over, without increasing the number of feeder sections and the number of the section switches used there. Therefore, it is possible to obtain a DC electric railway feeding system of this kind, which can reduce the time and cost required for maintenance of these.

[Brief description of drawings]

FIG. 1 is a wiring diagram of a section of a feeder station of a feeder for a DC electric railway according to the present invention, and FIGS. 2 and 3 show different examples of a feeder system for a conventional DC electric railway. It is a connection diagram of a classification feeder switchyard. 1 ... track, 2 ... pantograph, 3 ... train, 4,5 ...
… Kidden wire, 6 …… Kidden section, 7 …… Division switch,
8 ... Short circuit accident, 9 ... Train position detection device, 10a, 10b ...
… DC instrument transformers, 11a, 11b …… Voltage relay, 12 ……
Control device, 13a, 13b ... communication line, 14a, 14b ... Transmission device.

Claims (2)

(57) [Claims] 1. A feeder which is fed in parallel from an adjacent substation and which feeds a train through a pantograph of the train.
A feeder section provided between the feeders and a section switch connected in parallel to the feeder section for bridging and opening the feeder section are provided. In a feeder system for a DC electric railway, which is opened to prevent section over of the feeder section, a feeder section provided between the feeders is provided as a single section, and a section provided in the feeder section section. In addition to forming a single switch, each feeder line divided by the feeder section is equipped with a voltage detection device that detects the presence or absence of voltage, and the running position of the train is detected on the train track. The train position detecting device is provided, and the pantograph of the train is based on the position signal of the train of the train position detecting device and the voltage presence / absence signal of the voltage detecting device. A feeding system for a DC electric railway, which is equipped with a feeding control device that stops feeding to the feeder line on the voltage side without bridging the cable. 2. A voltage detector comprising a voltage measuring transformer provided on each side of the division switch, and a voltage relay connected to each of the voltage measuring transformers. A feeding system for a DC electric railway according to claim 1.