JP3246950B2 - Control method of information division switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling an information division switch installed on a power communication line for transmitting a control signal to a switch provided on a distribution line. Control method for an information-segmented switch capable of removing a faulty section of a transmission line and transmitting a signal to a transmittable section of the transmission line when a failure occurs in a transmission path that transmits a control signal to a switch that has been damaged It is.

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing a conventional example of a control method of a switch provided on a distribution line. In the figure, reference numeral 1 denotes a 6.6 kV distribution line transmitted from a distribution substation, for example. Is 6.6 kV, 400 A or 60 provided on the distribution line.
A switch 3 composed of a 0A rated air switch or a vacuum switch, etc., is a slave station for controlling the switch 2, and the switch 2 is connected to a control lead wire (for example, a 90V DC control signal is transmitted). The slave stations 3 are connected via a transmission line 4 composed of a pair wire or the like. The power of the slave station 3 is 100 V from 6.6 kV of the distribution line 1 by a single-phase transformer.
And is supplied after being reduced in pressure.

[0003] 4 is, for example, 0.9 mmφ copper wire, 1.2 m
A transmission line 5 composed of a pair of steel wires or the like and transmitting a frequency-modulated control signal of several volts to several tens of volts to a slave station, and a master station 5 for controlling the slave station 3. In FIG.
When controlling the switch 2 provided on the distribution line 1, the master station 5
Transmits a control signal for controlling the switch 2 together with an address signal for selecting the slave station 3. The address signal and the control signal transmitted by the master station are transmitted to the slave station 3 via the transmission line 4, and the slave station 3 selected by the address signal receives the control signal transmitted from the master station, and Switch 2 provided in
Control.

[0004]

By the way, in the control system shown in FIG. 4, if the transmission line 4 is hooked and broken by a dump truck or a crane truck, the transmission line is short-circuited, or the wiring is erroneously wired, The control signal for controlling the switch 2 of the distribution line 1 is interrupted, and the control is lost.

The present invention has been made in view of the above-mentioned problems of the prior art, and has a part of a transmission line for transmitting a control signal of a switch of a distribution line by inserting an information division switch into the transmission line. If transmission becomes impossible due to disconnection, short circuit, etc.,
By controlling the information segment switch, it is possible to remove a defective section, transmit a control signal using a transmittable portion of a transmission line, and control an information segment switch capable of controlling a distribution line switch. The aim is to provide a method .

[0006]

In order to solve the above-mentioned problems, a first aspect of the present invention provides a slave station for controlling a distribution line switch provided on a distribution line, and a control signal transmitted to the slave station. A master station for transmitting and controlling a switch for distribution lines, a slave station connected in series, a first transmission line having one end connected to the master station, and an appropriate portion of the first transmission line. , An information division switch provided in series, a relay station connected to at least one of the information division switches, and a relay station connected to the relay station via a second transmission line, and transmitting information from the master station to a second station. the control method of the information section switch that includes a through 2 transmission lines of the foster mother station to be sent to the relay station, when a failure occurs in the first transmission path, the information section switches the information section switches The lines before and after the first transmission line connected to the second transmission line are separated from the temporary master station. The information sent by the master station via the relay station and the relay station is sent to the information segment switch, and the information sent from the temporary master station is sequentially transferred to the next information segment switch. The information from the master station is transmitted to the slave stations connected to the transmittable section of one transmission path, and the information is received.
When information is sent to the track opposite to the
If the signal drops significantly below a certain limit,
Stop the signal connection to the side, lock this state,
When the status has exceeded a certain value, this status is set as the initial value.
The impedance of the transmission line on the side where signal connection is stopped.
And monitors whether or not the transmission path has recovered to a normal state .

According to a second aspect of the present invention, in the first aspect, the relay station connected to the information division switch is replaced with a temporary master station and the relay station is connected to the master station side of the second transmission line. The temporary master station is replaced with a relay station, and the function of a relay station is added to the temporary master station connected to the information division switch. The invention according to claim 3 of the present invention is the invention according to claim 1,
The temporary master station connected to the master station side of the transmission line is replaced with a relay station, and the function of the temporary master station is added to the information division switch connected to the relay station.

[0008]

According to the first aspect of the present invention, when a failure occurs in the first transmission line, the information division switch switches lines before and after the first transmission line connected to the information division switch. Separating, and then, from the temporary master station, sends the information sent by the master station via the second transmission path and the relay station to the information division switch;
The information division switch sequentially transmits the information sent from the temporary master station,
The information is transferred to the next switch, and the information is
When information is sent to the opposite line, the signal is immediately
If the signal drops significantly below the specified value, the signal to the opposite side
Stop the connection, lock this state and keep the above state constant
When the above has elapsed, this state is used as the initial value and signal connection
Monitor the impedance of the transmission path on the side where
Since it is monitored whether the transmission path has recovered to a normal state, when a failure such as disconnection or short circuit occurs in the first transmission path, the section in which the failure of the first transmission path has occurred is automatically determined. And information can be transmitted using the transmittable section of the first transmission path.

Further, claim 2 or claim 3 of the present invention.
Even if the relay station is replaced with a temporary master station or the temporary master station is replaced with a relay station as in the invention of the second aspect, the same effect as the invention of claim 1 can be obtained.

[0010]

FIG. 1 is a diagram showing an embodiment of the present invention. In FIG. 1, the same components as those shown in the conventional example of FIG. 4 are denoted by the same reference numerals. 1 is a distribution line, 2 is a switch provided on the distribution line, such as an air switch or a vacuum switch, and 3 is a slave station for controlling the switch 2, and is connected to the switch 2 by a control lead wire. The slave stations 3 are connected via a transmission line 4 and information division switches 6 and 6 ′, and a frequency-modulated control signal is transmitted via the transmission line 4.

Reference numeral 4 denotes a transmission path for transmitting a control signal to a slave station;
Is a master station for controlling the slave station 3, and 6 and 6 'are information for disconnecting the transmission line 4 of a faulty portion and transmitting / receiving a control signal when a failure such as disconnection or short circuit occurs in the transmission line 4 for transmitting the control signal. A section switch, 7 is a temporary master station for transmitting a control signal when a failure occurs in a transmission line, 8 is a relay station for relaying a control signal transmitted from the temporary master station 7, and 9 is a temporary master station and a relay station 8. A transmission path such as an optical fiber, a pair cable, or a coaxial cable that connects and transmits a control signal.

FIG. 2 is a diagram showing a configuration of the information division switch 6 shown in FIG. 1. In FIG. 2, reference numeral 4 denotes a transmission line, 61 denotes a matching transformer unit, 61a and 61b denote matching transformers, and 62
Denotes a signal switching unit, 63 denotes a control unit, 63a and 63d transmission / reception units, 63b denotes a modulation / demodulation unit, and 63c denotes a CPU unit. A, B, C, D and E are relays, and the CPU 63
It is switched by the output of c. The relay A is a relay for disconnecting the transmission line 4 and is normally ON, and is OFF when a failure occurs in the transmission line 4 or the like, and disconnects the failed portion.

The relay B is a relay for backup to the upstream side (master station side) of the transmission line, and is normally off. The relay C is a backup relay to the downstream side (load side) of the transmission line 4 and is normally off, and the relays B and C are disconnected when the transmission line 4 fails and the relay A is disconnected. , One of which is turned on to perform signal transmission and reception.

The relay D is a relay for monitoring a message to the upstream side (master station side) of the transmission line 4 and is normally turned on, and monitors signals on the transmission line 4 on the upstream side and the downstream side. The relay E is a relay for monitoring telegrams to the downstream side (load side) of the transmission line 4 and is normally off. When a failure occurs in the transmission line 4 and the relay A is disconnected, the relays D, E is turned on, and information on the transmission path 4 is monitored.

FIG. 3 is a diagram showing the configuration of an information division switch 6 'connected to the relay station 8 shown in FIG. 1. The same components as those in FIG. 2 are denoted by the same reference numerals. 3, the optical repeater 64 for transmitting and receiving the control signal to and from the temporary master station 7 and the interface circuit 6 of the control unit 63 'are different from those in FIG.
3e and 63f are added. In the figure, FS is a frequency shift modulation signal, and when a failure occurs in the transmission line 4, the frequency shift modulation signal FS transmitted from the master station 5 via the optical repeater 64 is given to the transmission / reception circuit 63a via the interface 63e. The signal is transmitted to the transmission line 4 via the relays B and C.

NRZ is a code signal of "1" or "0", and a communication message transmitted from the temporary master station 7 is demodulated by a modulation / demodulation circuit 63b via an optical repeater 64 and an interface circuit 63f, and transmitted and received by a transmission / reception circuit. Given to 63d,
The signal is transmitted to the transmission line 4 via the relays E and D. Next, FIG.
The operation of the embodiment of FIG. 3 will be described.

At the time of normal control, the master station 5 transmits a control signal for controlling the switch 2 together with an address signal for selecting the slave station 3, as described in the conventional example. The address signal and the control signal transmitted by the master station are transmitted to the slave station 3 via the transmission line 4, and the slave station 3 selected by the address signal receives the control signal transmitted from the master station, and The switch 2 provided in is opened and closed.

When the communication line of the transmission line 4 is normal, the relays A (see FIGS. 2 and 3) of the information division switches 6 and 6 'are on, and the control signal to the slave station 3 is transmitted via the relay A. The control section 63, 63 'monitors the presence or absence of a control signal on the transmission path 4 and the impedance of the transmission path via the relay D of the information division switch 6, 6'. Is done.

Here, if the control signal from the master station 5 to the slave station 3 cannot be transmitted due to the disconnection or short circuit of the transmission line 4, the control signal to the information division switches 6, 6 'becomes no signal. Becomes Control section 63, 63 'of information division switch 6, 6'
Monitors the control signal via the relay D as described above, and when it is detected that the control signal is in a no-signal state, turns off the relay A to separate the coupling before and after the transmission line 4 and The relay station 8 is notified that the connection of the transmission line 4 has been separated.

The relay station 8 informs the temporary master station 7 that the information has been interrupted when the above-mentioned communication is received from the information division switches 6 and 6 '. The temporary master station 7 informs the master station 5 that the information has been interrupted, and the master station 5 sends a control signal to the transmission line 4 upon receiving the notification. Since the temporary master station 7 cannot receive the information via the relay station 8, the temporary master station 7 confirms the information interruption. Next, the temporary master station 7 transfers the control signal transmitted by the master station 5 to the relay station 8 via the transmission line 9, and the relay station 8 transmits the control signal transferred from the temporary master station 7 to the information connected to the relay station 8. It is sent to the section switch 6 '.

The control section 63 'of the information division switch 6' receives the control signal transmitted from the transmission line 9 via the optical repeater 64 and relays the information to the relay B which is turned on when the failure of the transmission line 4 is detected. Alternatively, it flows to the upstream and downstream transmission lines 4 via C and the matching transformers 61a and 61b. When information is transmitted from the information division switch 6 'as described above, the information division switch 6 not connected to the relay station 8 confirms that new information has been transferred after the line separation, and checks the relay. The control signal is transferred to the line on the opposite side from the line on which the information is received, via the relay B or the matching transformer 61a or 61b.

As described above, each information division switch 6 sequentially transmits the signal transferred from the relay station 8 to the next information division switch 6,
6 ', and when the above state is continued for a certain period of time without any incident, the line connection is left as it is. Here, when the information division switches 6 and 6 'flow information on the line opposite to the line on which the information was received after the line separation, the signal immediately drops significantly below a certain specified value. , The information segment switches 6, 6 'stop the signal connection in the opposite direction and lock this state. In addition, the fact that the connection is locked is displayed outside.

When the above state is equal to or more than a certain value (for example,
After 0 minute), the information division switch 6 sets this state as an initial value, monitors the impedance of the transmission line 4 on the side where signal connection is stopped, and monitors whether the transmission line has recovered to a normal state. As described above, in the present embodiment, when a failure occurs in the transmission line 4, the transmission line in the defective section is cut off, and the control signal is transmitted from the temporary master station to the information partitioning switch. Also, the control signal can be transmitted in the healthy section.

In the above embodiment, the master station 5 is connected to the temporary master station 7 and the relay station 8 is connected to the information division switch, and the information from the temporary master station 7 is transmitted via the transmission line 9 to the relay station 8. The relay station 8 is connected to the master station 5 and the temporary master station 7 is provided on the information division switch 6 'side so that the temporary master station 7 has the function of the relay station 8; The information from the master station 5 can be directly relayed by the relay station 8 and transmitted to the temporary master station 7 provided on the information division switch 6 'side, and a signal can be sent to the information division switch 6'.

In the above embodiment, the temporary master station 7 is replaced with a relay station, and information from the master station is transmitted through the relay station → transmission line → relay station → information section switch. May have the functions of the temporary master station. Further, in the above embodiment, when a failure occurs in the first transmission line, the information transmitted from the temporary master station is sequentially transferred to the next information division switch via the sound first transmission line. Although an example has been described, the present invention is not limited to the above embodiment. For example, of the two lines of the first transmission line,
Even when the line is broken, such as transferring information to the next information segment switch via the other line that is not broken and the ground, via the first transmission line or another transmission line related thereto, Information can also be transferred to the next information segment switch.

[0026]

As is apparent from the above description,
In the present invention, when a failure occurs in the transmission line, the line before and after the transmission line connected to the information division switch is separated,
Next, the information transmitted by the master station from the temporary master station via the second transmission path and the relay station is sent to the information division switch, and the information sent from the temporary master station is sequentially transmitted to the information division switch by the next information division switch. The other side of the line where the information was transferred to the switch and received the information
As soon as information is sent to the railway line, the signal
If the value drops significantly below the value, signal connection to the other side
Stop and lock this state, and the above state
When this time has elapsed, signal connection is stopped using this state as the initial value.
Monitor the impedance of the transmission line on the stopped side, and
Is monitored to see if it has recovered to a normal state . If a failure such as a disconnection or short circuit occurs in the transmission line, the section in which the failure has occurred is automatically separated to rescue the transmittable section of the transmission line. As a result, the reliability of the control of the distribution line switch can be improved, and the power can be promptly relieved at the time of emergency.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of an information division switch.

FIG. 3 is a diagram showing a configuration of an information division switch connected to a relay station.

FIG. 4 is a diagram showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 distribution line 2 switch 3 slave station 4 transmission line 5 master station 6, 6 ′ information division switch 7 temporary master station 8 relay station 9 transmission line 61 matching transformer section 62 signal switching section 63, 63 ′ control section 64 optical repeater

Continuation of the front page (56) References JP-A-4-90231 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02J 13/00 311 H02H 7/26 H02J 3/00

Claims (3)

(57) [Claims] 1. A slave station for controlling a distribution line switch provided on a distribution line, a master station for sending a control signal to the slave station to control the distribution line switch, and a slave station connected in series. A first transmission line having one end connected to the master station, an information division switch provided in series at an appropriate position of the first transmission line, and at least one of the information division switches And a temporary master station connected to the relay station via a second transmission line and transmitting information from the master station to the relay station via the second transmission line. A method of controlling a switch, wherein the information-segmented switch is configured such that when a failure occurs in a first transmission path,
The temporary master station separates lines before and after the first transmission line connected to the information division switch, and when a failure occurs in the first transmission line, the temporary master station transmits information transmitted by the master station to the second transmission line and the relay. The information is transmitted to the information division switch via the station, and the information division switch sequentially transmits the information transmitted from the temporary master station.
By transmitting the information to the next information division switch, the information from the master station is transmitted to the slave station connected to the transmittable section of the first transmission line, and the information is transmitted to the line on the opposite side from the line on which the information was received. Shed
Immediately, the signal drops significantly below a certain limit
In this case, stop the signal connection to the opposite side and
Locked, and when the above state has passed for a certain period, this state will be set as the initial value.
And the impedance of the transmission line on the side where the signal connection is stopped
And monitor whether the transmission line has recovered to normal status
A method for controlling an information division switch, comprising : 2. A relay station connected to the information division switch is replaced with a temporary master station, and a temporary master station connected to the master station side of the second transmission line is replaced with a relay station, and the information division switch is replaced with a temporary master station. 2. The method according to claim 1, wherein a function of a relay station is added to the connected temporary master station. 3. The temporary master station connected to the master station side of the second transmission line is replaced by a relay station, and the function of the temporary master station is added to the information division switch connected to the relay station. Claim 1
Information section switch control method.