JPH0748930B2 - Distribution line loop switching device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a distribution line loop switching device that performs a loop switching operation that performs reverse transmission and transmission in a distribution system and a loop switching operation that returns the distribution system to a normal system. It is a thing.

[Conventional technology]

The ungrounded distribution system divides the distribution section into predetermined sections in order to minimize the power failure section and find the failure point early when the distribution line fails, and a loop point switching that performs reverse transmission and transmission. The equipment is installed on the distribution line.

FIG. 4 is a distribution system diagram in which the distribution lines that are respectively output from three distribution substations that are connected by the same system (not shown) are connected by loop point switches.
As / s, Bs / s and Cs / s are distribution substations A, B and C, respectively (1) is a distribution substation (As / s) busbar, and (2) is a distribution substation (Bs / s). s) bus, (3) distribution substation (Cs
/ s) busbar, (CB1) is a power distribution cable or disconnector connected to the busbar (1), (CB2) is a power distribution cable or disconnector connected to the busbar (2), and (CB3) is a busbar ( 3) is a power distribution line and disconnector, (F1) is a power distribution line and is connected to the other terminal of the circuit breaker (CB1) to supply power to the customer, (F2) is for power distribution The distribution line that is connected to the other terminal of the sushi breaker (CB2) to supply power to the consumer, and (F3) is the power distribution line that is connected to the other terminal of the sushi breaker (CB3). Supply line, (SS11), (SS12) are distribution switches for dividing the distribution line (F1) at predetermined intervals, (S21), (SS2
2) is a switch for dividing the distribution line (F2) at predetermined intervals, (SS31) is a switch for dividing the distribution line (F3) at predetermined intervals, and (SS20) is a distribution line ( Loop point switch for connecting F1) and distribution line (F2), (SS30) is a loop point switch for connecting distribution line (F2) and distribution line (F3), (S11) (S12) ) (S13) Shows breaker breaker (CB), section switch (SS11) (SS12) and loop point switch (SS20) section of distribution line (F1). From the section closer to (CB1), the first section of the distribution line (F1), the second section
Section, 3rd section, (S21) (S22) (S23) Ladder and breaker (C
B2) shows the section of the distribution line (F2) divided by the section switch (SS21) (SS22) and the loop point switch (SS20). ) 1st section, 2nd section, 3rd section, (S31) (S32) Ladder breaker (CB3), section switch (SS31) and loop point switch (SS3)
It shows the section of the distribution line (F3) divided by 0), and it is the first section and the second section of the distribution line (F3) from the section closer to the cable breaker (CB3).

Next, in order to perform a power outage construction of the distribution line in the second section (S12) of the distribution line (F1), a loop switching operation for setting this section as a power outage will be described as an example. The first section of the distribution line (F1), the second section,
The third section receives power from the bus (1) of the distribution substation As / s. In this state, in order to make the second section (S12) a power failure (the shaded area in Fig. 4 is called a power failure section), opening the partition switch (SS12) causes a power failure in the third section (S13), which is not the power failure target Becomes In order to minimize the blackout time in the third section (S13), the loop point switch (SS20) is turned on immediately after the division switch (SS12) is opened, and the distribution substation Bs / s
Reverse transmission and transmission is performed in the third section (S13). After that, the section switch (SS11) is opened and the second section (S12) is set to the power failure section.

By the above switching operation, the second section (S12) can be set as the power failure section. This loop switching operation is performed by manually opening and closing the switch at the site.

[Problems to be Solved by the Invention]

Since the conventional loop switching operation was performed as described above, after first opening the sectional switch surrounding the power failure section,
Since the switching time until the loop point switch is turned on causes a power failure, it is desirable that the switching time be as short as possible in order to reduce the influence on customers. However, as for the switching time of the manual opening / closing operation, the distance between the segment switch which is first opened and the loop point switch which is subsequently turned on is generally several tens of meters to several km. It took a few seconds because it was going on the road, and it was a local operation.

The present invention has been made to solve the above problems, and an object thereof is to obtain a distribution line loop switching device that automates loop switching operation, can shorten switching time, and can save labor. To do.

[Means for Solving the Problems]

A distribution line loop switching device according to the present invention connects a slave station installed in a section switch or a loop point switch to a master station that issues a loop switching operation command by a data transmission system, and sets loop switching from the master station. The function to temporarily store the data and to intercept the control response signal returned to the master station from another slave station to the master station by opening and closing the section switch or loop point switch by the loop switching command. The section switch or the loop point switch is directly controlled by the slave station based on the control response signal and the stored loop switching setting.

[Action]

In the distribution line loop switching device according to the present invention, a master station and a slave station are connected by a data transmission system to remotely control a section switch or a loop point switch, and the slave station temporarily stores the data. Judging from the loop switching setting from the master station and the setting response signal from another slave station, the section switch or loop point switch can be controlled directly without the setting command of the master station.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. In Fig. 1, the same numbers as those in Fig. 4 indicate the same or corresponding parts, and (11) (12) (21) (22) (31) are sectional switches (SS11) (SS12) (SS21) ( Slave station for SS22) (SS31),
(20) (30) are slave stations for loop switch (SS20) (SS30), (11-1) (12-1) (21-1) (22-1) (30-
1) controls the opening / closing of each of the division switches (SS11) (SS12) (SS21) (SS22) (SS31) from the slave stations (11) (12) (21) (22) (31) and detects the state. Control line for (20-1) (30-1) is loop point switch (SS20)
(SS30) is a control line for controlling opening and closing of each and detecting its state, (40) is a master station, (50) is a master station (40)
And a slave station (11) (12) (20) (21) (22) (30) (31) for data transmission.

Fig. 2 shows a slave station (20) as a representative example among the slave stations in Fig. 1.
In the figure, the same numbers as those in FIG. 1 indicate the same or corresponding parts, and (20-2) is the master station (40) to open or close the section switch or loop point switch. A remote control command memory for storing control commands sent for control, (20-3) is a loop switching setting temporary storage memory for temporarily storing loop switching setting data sent from the master station, (20-4) ) Is from the slave station to the master station (4
(20-5) AND gate, (20-6) OR gate, (20-7) achieves the function of the slave station (20). It is a control unit for doing. FIG. 3 is a time chart showing the procedure of the loop switching operation for making the second section of the distribution line (F1) into a power failure section. In the figure, the same numbers as in FIG. 1 indicate the same or corresponding parts. (20-A) is a loop switching setting command sent from the master station (40) to the slave station (20), (20-A)
B) is the control response data (12-A) sent to the loop switching setting command from the slave station (20) to the master station (40). The master station (40) sends the control response data (12-A) to the slave station (12). Command, (SS12−
(A) is an open signal sent from the slave station (12) to the division switch (SS12), (SS12-B) is an opening / closing state signal of the division switch (SS12), and (12-B) is a slave station (12). Control response data sent in response to a release command (12-A) from the master station to the master station (40),
(SS20-A) is a slave station (20) to loop point switch (SS20)
Signal (SS20-B) is a switching point signal of the loop switch (SS20), (20-B) is control result data transmitted from the slave station (20) to the master station (40), (11-A) is a release command sent from the master station (40) to the slave station (11), (SS
11-A) is an opening signal sent from the slave station (11) to the division switch (SS11), (SS11-B) is an opening / closing state signal of the division switch (SS11), and (11-B) is a slave station ( It is control response data sent from the 11) to the master station (40) in response to the release command (11-A).

Next, the operation will be specifically described with reference to the apparatus configuration of the embodiment shown in FIG. 1, the block diagram showing the configuration of the slave station shown in FIG. 2, and the time chart showing the procedure of the loop switching operation shown in FIG. To do.

Slave station (11) for each section switch (SS11) (SS12 () SS21) (SS31) and loop point switch (SS20) (SS30)
(12) (21) (31) (20) (30) are installed, and these slave stations exchange data with the master station (40) via the communication line (50). Usually, the master station (40) sends a command for opening / closing control of the segment switch and loop point switch to the slave station, or sends a boring command for monitoring the state of the segment switch and loop point switch.

Next, power outage work is required in the second section (S12) of the distribution line (F1) of the distribution substation (AS / S), and this section is used as a power failure section, that is, a power failure section. The procedure will be described with reference to FIG.

First, the master station (40) sends a loop switching setting command (20-A) to the slave station (20). The slave station (20) stores this command in the loop switching setting temporary storage memory (20-3) in FIG. 2 and returns the control response data (20-B) to the master station (40) as a response to this command. Subsequently, an opening command (12-A) for opening the division switch (SS12) is sent from the master station (40) to the slave station (12) in order to make the second section (SS12) a power failure section. .

The slave station (20) has a section switch (SS12) based on this command.
Sends an open signal (SS12-A) to open the sectional switch (SS12). Then, the open state signal (SS12-B) from the division switch (SS12) is received and this signal (SS12) is sent to the master station (40).
12-B) as control response data (12-B), master station (40)
Send to. The slave station (20) uses this control response data (12-
When I heard that B) was intercepted and the section switch (SS12) was opened,
It is stored in the control response storage memory (20-4) in FIG. The slave station (20) already has a loop switching setting temporary storage memory (20
Since the loop switching setting signal is stored in -3),
An AND condition with the content of the control response storage memory (20-4) is satisfied, and an AND gate (20-5) and an OR gate (20-) with the remote control command memory (20-2) that stores the remote control command.
6) and the closing command (SS20-A) is sent to the control line (20-
It is sent to the loop point switch (SS20) via 1) and the third section (S1) during the power failure without waiting for the closing command from the master station (40).
Insert a loop switch (SS20) to exchange power with 3). The input result is sent from the slave station (20) to the master station (40) as a status signal (SS20-B) of the loop point switch (SS20).

Then, the master station (40) goes to the slave station (11) and switches to the switch (SS1
An opening command (11-A) for opening 1) is sent, the section switch (SS11) is opened by the opening signal (SS11-A), and the second section (S12) is set to the power failure section. The slave station (11) outputs an open state signal (SS
11-B) sends control response data (11-A) to master station (40)
To complete the loop switching operation.

Although the communication line is used as the data transmission line between the master station and the slave station in the above embodiment, other data transmission means may be used.
Also, as the loop switching procedure, the procedure is to open the section switch in the power failure section after the loop switching setting command. However, even if both procedures are simplified to one procedure, or if the procedure is subdivided, the slave station transfers to the master station. A device that intercepts the control response signal and turns on the loop point switch only by the judgment of the slave station without waiting for the closing command from the master station has the same effect regardless of the procedure.

〔The invention's effect〕

As described above, according to the present invention, since the control response signal from the slave station to the master station is intercepted and the loop point switch is immediately turned on without waiting for the command from the master station, a power failure on the load side from the power failure section Since the time can be minimized and the influence of the data transmission speed between the master station and the slave station can be suppressed, the existing switch remote control system can be reused, and the device can be inexpensive.

[Brief description of drawings]

1 to 3 are views showing an embodiment of the present invention.
Fig. 1 is a block diagram showing a distribution line loop switching device, and Fig. 2 is a first diagram.
FIG. 3 is a block diagram showing the configuration of the slave station shown in the figure, and FIG. 3 is a time chart showing the procedure of the loop switching operation. FIG. 4 is a power distribution system diagram for explaining the conventional technique. In the figure, (AS / S) (BS / S) (CS / S) are distribution substations, (1), (2) and (3) are distribution substations (AS / S) (B).
S / S) (CS / S) busbar, (SS11) (SS12) (SS21) (S
S22) (SS31) is a segment switch, (SS20) (SS30) is a loop point switch, (11) (12) (20) (21) (22) (30)
(31) is a slave station, (11-1) (12-1) (21-1) (22-
1) (31-1) (20-1) (30-1) are section switches, control lines that control the opening and closing of loop point switches, (40) is the master station (5
0) is a communication line, (20-3) is a loop switching setting temporary storage memory, (20-4) is a control response storage memory, (20-5).
An AND gate, (20-6) is an OR gate, and (20-7) is a control unit. In each figure, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshinobu Ebisaka 1-2-2 Wadazakicho, Hyogo-ku, Kobe, Hyogo Prefecture Mitsubishi Electric Corporation Control Works (72) Inventor ▲ Keiji Haya Kobe, Hyogo Prefecture 1-2, Wadasaki-cho, Hyogo-ku Mitsubishi Electric Corporation Control Factory

Claims (1)

[Claims] 1. A loop switching of a plurality of distribution lines, which is supplied with electric power from a bus of a high power distribution station and is provided with a segment switch and a loop point switch for reverse transmission and transmission at predetermined intervals. In the distribution line loop switching device, after opening the predetermined section switch, the predetermined loop point switch is turned on to perform a loop switching operation for switching the distribution system or a reverse procedure of the loop switching operation, When performing a loop cutback operation to return the power distribution system to a normal state, the function to monitor and control the division switch, the loop point switch at the installation location of the division switch, the loop point switch, and the master station A slave station having a data transmission function of transmitting and receiving data, a function of storing setting data from the master station at one time, and a function of receiving a control response signal from another slave station is installed, and data with each slave station is set. Master station with transmission function From the master station, the temporary storage setting data installed and stored in the slave station and the control response signal for outputting the control result of the section switch or the loop switch to the master station are sent. A distribution line loop switching device, wherein loop switching is performed by turning on the section switch or the loop point switch on the slave station side without waiting for a command.