JP2916245B2 - Distribution line monitoring system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution line monitoring system that controls opening and closing of a section via a plurality of slave stations installed in a distribution line.

[Conventional technology]

Conventionally, the distribution line has a master station and a plurality of slave stations installed and connected via communication lines.The master station controls the line switch of the slave station to disconnect or re-enter the accident section. Is going.

[Problems to be solved by the invention]

The master station and slave stations detect changes in line current and voltage to detect accidents.However, it is difficult to detect nature such as ground faults caused by damage to line equipment and progress of insulation deterioration. Was.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a distribution line monitoring system that can immediately transmit a line condition for each section from a slave station to a master station, and can promptly execute accident prediction and accident processing.

[Means for solving the problem]

In order to achieve the above object, the invention according to claim 1 includes, in the slave station, a relay circuit of a monitor device operated in close proximity to a distribution line, and the relay circuit is provided by an accident signal in the master station or the slave station. The circuit is opened via a normally closed contact provided on the communication line of the relay, and the communication line includes an audio signal processing unit and an image signal processing unit, and an audio input terminal and an image input terminal to which a monitor device can be connected. We take the means of connecting.

According to a second aspect of the present invention, a communication line between the normally closed contact of the relay and the audio signal processing unit and the image signal processing unit is connected in parallel with memories for storing monitor information via branch lines, respectively. The branch line is connected to a normally open contact which is closed when the relay is operated by an accident signal.

[Action]

Since the track conditions for each section can be collected from the monitor site to the master station in a short time, information processing and setting or updating of control programs can be quickly performed.

Also, since the accident processing can be prioritized even during monitoring, there is no hindrance to track monitoring.

Further, in the first aspect of the invention, by connecting the monitor device to the audio input terminal and the image input terminal, particularly, the data output from the audio signal processing unit and the image signal processing unit are transmitted to ensure the monitoring operation. Can be done.

In the invention according to claim 2, when the relay is operated by an accident signal, the normally closed contact is opened, and the normally open contact is closed, the monitor information is stored in the memory, and the accident signal disappears. The normally closed contact is reclosed, and the normally open contact is reopened, and the monitor information stored in the memory is transmitted.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of a distribution line system monitored by a master station 1. A distribution line 2 is operated by supplying power from a substation H.

In the distribution line 2, slave stations K1 to Kn controlled by the master station 1 in the event of an accident or failure in the line are provided, and are connected to the master station 1 via a communication line 3 so that they can be updated.

In the above, the communication line 3 is connected in a loop.

As shown in FIG. 2, the master station 1 includes a communication device 4 serving as communication means for the slave stations K1 to Kn, a CPU 5 serving as processing means for input signals and command signals, and a storage means for storing accumulated data and communication data. And a ROM 7 as a storage means of a program for controlling arithmetic operations and each of the slave stations K1 to Kn. The CPU 5 is an accident detection unit 8 installed in the substation H
It is connected to the.

The accident detection unit 8 is composed of a zero-phase current transformer (ZCT) and a grounding transformer (GPT) conventionally installed in a substation.
And a group of equipment such as a ground fault directional relay (DGR).

The master station 1 uses a data frame to identify a communication code with each station when transmitting / receiving data to / from the slave stations K1 to Kn.

An information center 34 is connected to the CPU 5 of the master station, and a display 35, a speaker 36, and a video 3
7. A receiving monitor such as a recording device 38 and a teleprinter 39 is connected.

Among the slave stations, for example, the slave station K5 is connected to a photocurrent / voltage sensor 10 provided in the distribution line 2 to convert an optical signal into an electric signal as shown in FIG. The device 11 and the accident detection circuit 12 are connected, and further, a communication device 14 is connected via a communication module 13.

A line switch 15 is provided in the distribution line 2, and is connected to the communication device 14 via a control circuit 16.

On the other hand, in the adjacent slave station K6, for example, the photocurrent / voltage sensor 10 is not provided, and only the line switch 15 and the control circuit 16 are provided.

As shown in FIG. 3, the slave stations K5 and K6 are provided with a relay circuit 17 of a monitor device M, which will be described later, configured as follows.

The relay circuit 17 is provided with an audio input terminal 18 at one end of the communication paths 1 and 127, connects the audio signal processing unit 19 and the signal compression circuit 20, and has an image input terminal 21 to provide an image signal processing unit 22 and a signal. By connecting to the compression circuit 23, the communication line 1, l2
The other end of the communication device 1 through the normally closed contacts 25 and 26 of the relay 24
Connected to 4.

The relay 24 is connected to the accident detection circuit 12 in one of the slave stations K5, and is provided so as to operate and open and close contacts according to the abnormal signal.In the other slave station K6, the control circuit 16 and the accident detection unit 8
The contact is opened and closed by operating according to a control signal from the master station 1 that has detected the accident.

Further, in the relay circuit 17, the communication lines 1, l2
Are connected in parallel via branch lines l3 and l4, and the normally open contacts 27 and 28 of the relay 24 are connected to the branch lines l3 and l4.

The monitoring device M of the distribution line 2 is equipped with, for example, a microphone 30 and a television camera 31 and is connected to the audio input terminal 18 and the image input terminal 21 of the relay circuit 17 of the slave station during operation. , Monitor information can be transmitted to the master station 1.

The monitor device M is, for example, as shown in FIG.
The relay circuit of the slave stations K1 to Kn is installed on a boom 41 mounted on 40 and brought close to the distribution line 2 via a signal cable 42.
It can be connected to 17.

 The operation of the embodiment configured as described above will be described.

When the monitor device M is connected to the relay circuit 17 and operated at the time of a periodic inspection or the like, the monitor information is transmitted to the audio and image signal processing units 19 and 22 on the communication lines 1 and 12 and the two signal compression circuits 2 and
Via the communication device 14 to the master station 1 via the
The information is received by the information center 34 via U5, the image of the television camera 31 is projected on the display 35, and the speaker is
The sound from the microphone 30 is expanded to 36.

In addition, the video can be recorded on video 37, the audio is a recording device
It can be recorded by 38 or teleprinter 39.

In the above embodiment, since the current condition of the environmental conditions of the distribution line 2 and the voice report of the inspector can be viewed from the information center 34,
Questions and answers with the site can be made, which is convenient not only for inspection but also for construction of the distribution line 2.

Further, if the monitor device M is equipped with an ultrasonic microphone 32 and an infrared camera 33 in addition to the microphone 30 and the television camera 31, ultrasonic noise in a high frequency region due to insulation deterioration of the equipment and an overheated atmosphere of the line switch are reduced. Can supplement.

Further, as described above, if the relay 24 is provided in the relay circuit 17, if the monitor device M is in operation, the accident detection unit 8 of the master station 1 and the accident detection circuit 12 of the slave stations K1 to Kn should be used.
Also detects an abnormal signal, the relay 24 operates to open the normally closed contacts 25 and 26 to stop the input from the monitor device M. Therefore, communication with the master station 1 by the slave stations K1 to Kn is performed. Alternatively, the control of the slave station by the master station 1 cannot be prevented.

Further, the normally open contacts 27 and 28 of the relay 24 are connected to the relay open circuit 17.
, The normally open contact is closed by the accident signal, and the monitor information can be stored in the memory 29.

If the accident signal disappears, the relay 24 operates,
The normally closed contacts 25 and 26 are closed again, and the relay circuit 17 is restored. On the other hand, when the normally open contacts 27 and 28 restart, the memory 2
9 outputs the stored monitor information and starts transmission.

Although the above situation is a rare case, according to the present invention, even if a line accident occurs while the monitor device M is operating, it does not hinder the accident processing, so that the distribution line can be inspected at any time. There are advantages.

In the embodiment, the information center 34 can obtain the track condition in normal times for each section directly from the site, and can repair the track at an early stage.
Since the control program of Kn can be updated and waited, it is possible to respond quickly even if a track accident occurs.

In addition, an E / O converter is provided in the communication devices 4 and 14, and the communication line 3 is provided.
If an optical fiber cable is provided, the present invention can be implemented by an optical communication circuit.

〔The invention's effect〕

As described in detail above, the present invention can obtain track monitor information for each section in a short period of time and predict an accident, and can quickly execute a repair plan or a control program for a repair plan of a track. This is effective for maintaining stable supply.

According to the first aspect of the present invention, by connecting the monitor device to the relay circuit, the monitor information can be transferred to the master station by the communication device via the voice and image signal processing unit, and the monitor information can be reliably recognized by the voice and the video. In addition to the above, it is possible to prioritize the accident processing during the monitoring operation, so that there is no obstacle to the line monitoring.

According to the second aspect of the present invention, the monitor information can be stored in the memory during the period of the accident signal and transmitted after the accident signal disappears with a simple configuration.

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a block diagram of a distribution line, FIG. 2 is a block diagram of a master station, FIG. 3 is a block diagram of a slave station, and FIG. It is a perspective view showing the example of use of the monitor equipment used for the present invention. 1 ... master station, 2 ... distribution line, 3 ... communication line, 4,14 ...
Communication device 8, accident detection unit 12, accident detection circuit 15, line switch 16, control circuit 17, relay circuit 24, relay, K1 to Kn, slave station, M ...... Monitor equipment.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02H 7/22-7/26 H02J 13/00 H04Q 9/00 G01R 31/02-31/08 H02G 1 / 02

Claims (2)

(57) [Claims] A distribution line (2) is divided by a line switch (15), and slave stations (K1 to Kn) provided for each section are provided;
In the distribution line monitoring system including the master station (1) for controlling the slave station, a relay circuit of a monitor device (M) operated near the distribution line (2) is provided to the slave station (K1 to Kn). (17), and the relay circuit (17) is connected to the normally closed contact (1, l2) provided on the communication line (1, l2) of the relay (24) by an accident signal in the master station (1) or the slave station (K1 to Kn). 25,26) and the audio signal processor (19)
And a distribution line monitoring system in which an image signal processing unit (22) is connected to a sound input terminal (18) and an image input terminal (21) to which a monitor device (M) can be connected. 2. The communication lines (1, l2) between the normally closed contacts (25, 26) of the relay (24) and the audio signal processing unit (19) and the image signal processing unit (22) have branch lines, respectively. A memory (29) for storing monitor information via (l3, l4) is connected in parallel,
The distribution line monitoring system according to claim 1, wherein a normally open contact (27, 28) that is closed when the relay (24) is activated by an accident signal is connected to the branch line (13, 14).