JPH0241267B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is for operating switchgear of a distribution substation from a distance during the restoration of work on a distribution system, and in which a field worker, a power distribution dispatcher and/or a switch operator The present invention relates to a distribution line information transmission device that reliably transmits operation requests to a control console in a central control room.

Conventionally, the operation of distribution lines and disconnectors at distribution substations is controlled by the distribution dispatcher upon receiving a request via radio telephone from the field when work on the corresponding distribution line is stopped or when power is retransmitted due to the completion of restoration work. A further request was made over the phone to the person in charge of operation at the facility, and the operator performed the input operation for the disconnection switch and confirmed it. In recent years, as control centers have become increasingly unmanned, there has been a trend for power distribution dispatchers to directly turn on and off power distribution lines and disconnectors. That is, this means that the conventional remote monitoring and control device for power distribution switches and disconnectors will be advanced to the branch office or business office where the power distribution dispatcher works. In other words, in the past, three people would check for on-site information errors: power distribution dispatcher → operator → confirmation person, but in this case, when a single power distribution dispatcher checks the information, the power distribution dispatcher, who is in charge of a huge amount of equipment, has to check for errors in the on-site information. It becomes extremely difficult to operate distribution lines and disconnectors from a distance in a reliable manner in accordance with the work.

This will be explained below with reference to Figure 1.
In the figure, 1 is a remote monitoring and control device slave station, 2 is a relay device,
3 is a remote monitoring and control device master station, 4 is a repeater, 5 is a distribution line transmission device, 6 is a control console, 7 is a high-voltage coupler, 8 is a work vehicle with wireless equipment, 10 is a transformer, 20 is a distribution line, 21, 22, 23 are distribution line disconnectors, 11
1,112,113,114,211,212,
213, 214, 311, 312, 313, 31
4 is the section, L ₁₂ , L ₂₃ , L ₁₄ , L ₂₄ , L ₃₄ is the normally open switching device, 121, 122, 221, 222, 32
1,322 is a normally closed switchgear.

In such a configuration, the on/off information of the distribution line breakers 21, 22, and 23 of the distribution substation is transmitted from the remote monitoring and control device slave station 1 to the remote monitoring and control device via the relay device 2. The data is transmitted from the master station 3 to the control console 6 and displayed. In addition, distribution lines and disconnectors 21-2
The on/off operation in step 3 is executed by following the reverse route.
For accidents that occur in distribution line sections, although we will not discuss them in detail, normally closed switchgear 121, 122, which automatically disconnects the faulty section using a timed accident investigation method
221, 222, 321, and 322 perform a so-called locking operation to perform disconnection, and normally open switching devices L ₁₂ , L ₂₃ , L ₁₄ , L ₂₄ , and L ₃₄ are connected to healthy sections to perform load accommodation. For example, if an accident occurs in section 212, normally closed switchgears 221 and 222
remains open and enters a locked state, and since the section 211 is on the power supply side, power is transmitted by the re-closing operation of the distribution line and disconnector 22. On the other hand, the section 213 on the load side of the accident section 212 has no voltage, but after a certain period of time, the normally open switching device _L24 is turned on by electricity from the adjacent section 214, and load accommodation is put into practice. By the way, the above-mentioned normally open switching devices L ₁₂ , L ₂₃ , L ₁₄ , L ₂₄ ,
L ₃₄ is configured as shown in the single line diagram shown in Fig. 2, and it is determined from the transformer T of the power supply unit with high voltage coupler 32 or 33 that power is lost on either side of the high voltage switch 31. , the loop point accident investigation device 34 detects and counts the time. Furthermore, the slave station device 35 that carries the distribution line transmits the command from the control console 6 shown in FIG.
The signal is received via the repeater 4 → high voltage coupler 7 → capacitor C and transformer T of the high voltage coupler shown in FIG. 2, and the input is executed.

Now, assume that work is to be actually carried out in section 211 in FIG. On-site workers (on-site dispatch team) are using the switches 22 that separate section 211,
Work begins only after L ₂₃ and 221 are turned off, but the normally closed switch 221 is turned off at the site, the normally open switch L ₂₃ is left in the locked state, and the radio-equipped worker 8 is turned off. I notified the power distribution dispatcher via radio telephone that preparations were complete and waited for the distribution line and disconnector 22 to be opened. As mentioned above, when the power distribution dispatcher directly turns on and off the distribution lines and disconnectors 22, for example, if only a phone call is required, the name of the line is "Yamashita" or "Yamakita".
``〇〇7'' and ``〇〇4'' indicate the clarity of the telephone.
Misunderstandings and misunderstandings can lead to mistakes, which can lead to unnecessary operations being performed. Of course, work is carried out in a planned manner, but in reality, when work is being done in multiple locations at the same time, it is desirable that information be communicated more reliably from the on-site dispatch team.

This invention was made in view of the above circumstances, and is suitable for those who work on power distribution systems and operate switchgears of distribution substations from a distance during restoration.
The purpose of the present invention is to provide a distribution line information transmission device that can reliably transmit a request for operation of a disconnector from a field worker to a central control room.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4. Normally open automatic opening/closing device L ₁₂ , L ₂₃ ,
As shown in FIG. 2, L ₁₄ , L ₂₄ , and L ₃₄ all have power supply units 32 and 33 with high-voltage couplers arranged on the left and right sides around a high-voltage switch 31, and further include a loop point accident investigation device 34 and a conveyor. A slave station device 35 is arranged. This carrier slave station device 35 is provided with an external connection terminal 353 for connecting a shaft disconnection operation requesting device 36, which will be described later.

As shown in FIG.
4, a modulation circuit MOD that modulates this output and the output of the oscillator OSC, an amplifier circuit AMP that amplifies the output of this modulation circuit MOD, and an output of this amplifier circuit AMP. It consists of a switch S that switches the signal lines 351 and 352 to signal lines 351 and 352. This switch S is connected to either the high-voltage coupler-equipped power supply device 32 or 33 on the energized side of the distribution line by a control circuit (not shown).

The external structure of the shield breaker operation requesting device 36 is as shown in FIG. It is provided with a switch SS and a start push button SPB, a lamp L that lights up during transmission, and an external connection terminal 356 that can be connected to and separated from the external connection terminal 353 of the carrier slave station device 35. The inside of the breaker operation requesting device 36 is
As shown in FIG. It is now entered into .

In such a configuration, when requesting a power distribution dispatcher near the control console 6 of the shingle breaker operation requesting device 36 to open the distribution line shingle breaker 22, a field worker must first Normally open switchgear L ₁₂ in Figure 1
External connection terminal 35 of carrier slave station device 35 corresponding to
3 is connected to the external connection terminal 356 of the breaker operation requesting device 36. Using the digital switch SW of the shield disconnector operation requesting device 36, set the number of the shield disconnector to be requested, and further set the operation content, whether it is an ON operation or an OFF operation, using the switch SS.
Press the start push button SPB. Then, the signal of the contents set in the setting section ES of the shield breaker operation requesting device 36 (the number of the shield breaker and the operation details) is displayed on the control console 6 as described below. In addition, lamp L
lights up during transmission.

On the other hand, it is encoded by the encoder ENCODER according to the conditions of the switch SW shown in FIG. 4b. This coded signal is transmitted to the external connection terminal 353 in FIG.
is sent to a modulator MOD, which modulates the output of the oscillator OSC, and sent from the amplifier AMP via a switch S to a line 351 or 352, which is connected to a high-voltage coupler 32 or 33. This carrier signal, that is, the signal having the contents set in the setting section ES, is transmitted from the high-voltage coupler 7 in FIG. The power distribution dispatcher or the disconnector operator sees the disconnector number and operation details displayed on the control console 6 and operates accordingly.

As mentioned above, communication with the field dispatch team, which was conventionally done by telephone, can now be done by establishing an information transmission route using the shield breaker operation request device 36 and the transport slave station device 35, in addition to the telephone. The disconnection operation is carried out, increasing the safety of field workers and reducing operation time.
It is also advantageous in terms of operation. Furthermore, since the disconnector operation requesting device 36 is made portable, it is economically advantageous compared to fixed equipment.

Note that the present invention is not limited to the above-described embodiments, and can be modified in various ways without changing the gist thereof. For example, a transmitter and an amplifier may be housed in the breaker operation requesting device, and an acknowledgment signal in response to a request from the center can be received and displayed.

According to the present invention described below, in a system that enables work on the power distribution system and operation of switchgears of a power distribution substation during restoration from a distance, an external connection terminal is provided in a carrier slave station device, By making the operation request device portable and equipping it with an external connection terminal that can be connected to and separated from the external connection terminal of the transport slave station device, there is one more information transmission route compared to the conventional device, so it can be easily accessed from field workers to the central control room. It is possible to provide a distribution line information transmission device that can reliably transmit a request for operation of a disconnector to a power supply line.

[Brief explanation of the drawing]

Figure 1 is a system configuration diagram of a power distribution system and switches, Figure 2 is a block diagram of a system to which the present invention can be used to operate switches in a power distribution system from a distance, and Figure 3 is a diagram of the system shown in Figure 2. FIGS. 4A and 4B are block diagrams showing a part of a carrier slave station device, and FIGS. 4A and 4B are block diagrams showing an external view and an internal structure of a shield breaker operation requesting device, which is the main component of the present invention, respectively. 20... Distribution line, 35... Carrier slave station device, 36
...Shiya breaker operation request device, 353,356...
External connection terminal.

Claims (1)

[Claims] 1. In devices that remotely control switches connected to the power distribution system using the distribution line transport method, it is possible to connect to the external connection terminals provided for each of the distributed transport slave station devices and to each of these external connection terminals. and a portable switch operation request device that converts the switch on/off operation request into a signal, and the signal from the switch operation request device can be transmitted to the central control room via the power distribution line. A distribution line information transmission device characterized by: