JPS6028223B2 - Distribution line operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power distribution line operating device, and particularly to a power distribution line operating device that operates unnecessary sectional switches for power interchange due to work power outages on power distribution lines.

For example, in order to operate a distribution line in a power distribution system as shown in FIG. 1, a power distribution line operating device having a configuration as shown in FIG. 2 has conventionally been used.

In FIG. 1, reference numeral 1 denotes a busbar, which is installed on the secondary side of a distribution substation transformer, connects the transformer and each distribution line, and generally connects a plurality of distribution lines.

In addition, 2 (2-1 to 2-4) are distribution line circuit breakers (hereinafter referred to as FCB) that connect bus 1 and distribution lines, and are used for the purpose of causing power outages in sections by opening and closing them. , operates by opening/closing signals from the remote monitoring and control device slave station 5 (FIG. 2). 3 (3-1 to 3-16) is a section, which is composed of a collection of consumers, and receives power from the supply line through the distribution line break switch 2 or the section switch 4.

4 (4-1 to 4-16) are section switches (hereinafter referred to as PSWs), which are used for the purpose of transmitting camphor power to section 3 or connecting and disconnecting section 3. Works with signals.

Also, it has a function that automatically opens when the line becomes non-voltage)
. The power of bus 1 is branched by feeders 10-1 to 10-4, and distribution line breakers FCB2-1, 2-2, 2
3-1, 3-6, 3-11 through 1-3, 2-4,
3-14.

In this case, the power supplied to the sections 3-1, 3-6, 3-11, and 3-14 is sequentially supplied to a large number of sections 3 on the terminal side interconnected by the section switch tower W4 in a chain manner. go. For example, power in section 3-1 is supplied to section 3-2 via PSW4-1, further supplied to section 3-3 via PSW4-2, and then further supplied to section 3-3 via target W4-3.
4, and further fed to the endmost section 3-5 via PSW 4-4. However, in this case, the interval 3-3
and 3-5 are sections 3-8 and 3-10 of other systems supplied with power from the feeder 10-2, that is, the circuit breaker 2-2.
are coupled via PSWs 4-5 and 4-6, respectively. Note that in Figures 1 and 3, ``C'' indicates a closed circuit breaker FCB, and ``Xia'' indicates an open circuit breaker FC.
B, 0 indicates a closed section switch PSW,
■ indicates the section switch PSW that is open, and here indicates the section.

For the power distribution system shown in FIG. 2, the conventional power distribution line operating device operates as follows.

Open/close status of PSW4-1 to 4-16 and PCB2 (2
-1 to 2-4) are open/closed.
5 (5-1, 5-2, . . . ) (hereinafter referred to as a TC slave station) to a remote monitoring and control device master station 6 (hereinafter referred to as a TC master station).

The TC master station 6 transmits the information transmitted from the TC slave station 5 to the system monitoring panel 7. The system monitoring panel 7 uses the transmitted PSW4
and displays the open/closed status of FCB2. Further, the load current of the feeder 10 (hereinafter referred to as feeder current) is transmitted from the TC slave station 5-1 to the TC master station 6, and further transmitted to the TC master station 6.
The information is then sent to the system monitoring panel 7 and displayed on the system monitoring panel 7. In this way, the remote monitoring and control device slave station (TC slave station) 5
By receiving the switching signal from the remote monitoring and control device master station 6, the section switch 4 and the distribution line sheath breaker 2 are opened and closed.

It also has a function of transmitting the open/closed states of the sectional switch 4 and the distribution line sheath breaker 2 and the magnitude of the load on the distribution line to the remote monitoring and control device master station 6. In addition, the remote monitoring and control equipment master station (TC master station) 6 receives information about the open/closed states of the sectional switch 4 and distribution line breakers 2, and the magnitude of the load on the distribution line, which are transmitted from the remote monitoring and control equipment slave station 5. The information is transmitted to the system monitoring panel 7.

Furthermore, the system monitoring panel 7 has a function of displaying the open/closed states of the section switches 4 and the distribution line breakers 2, and the load on the distribution lines, which are transmitted from the remote monitoring and control device master station 6.

In addition to this, an operation console 8 is provided.

The operation console 8 is provided with a switch for instructing the opening and closing of the sectional switch 4 or the power distribution sheath breaker 2, and transmits the signal of the instructed switch to the remote monitoring and control device sub-master station 6. However, by operating the switch provided on the console 8,
When you instruct W4 or FCB2 to be operated and the direction of operation of the barrier or closed path, the operation signal is transmitted to the TC slave station 5 through the TC master station 6, and the TC slave station 5 operates the spot W4 or FCB2 according to the commanded operation signal. Operate FCB2.

The open/close status of the PSW 4 or FCB 2 after the operation is displayed on the system monitoring panel 7 through the TC slave station 5 and the TC master station 6 as described above. As described above, the feeder current in the FCB 2 after the operation is also displayed on the system monitoring panel 7 through the TC son 5-1 and the TC master station 6. In the conventional power distribution line operation device shown in Figure 2, the gull W
4 is operated as follows.

In other words, in the distribution system shown in Figure 1, sections 3-6, 3-
When 7, 3-8, 3-9, and 3-10 are being supplied with power from FCB2-2, there is a work power outage in section 3-7 (
(This is called the work section), if you simply turn off section 3-7, sections 3-8, 3-9, and 3-10 (these are called the reverse section) on the distal side of section 3-7 will also be affected. The power goes out together.

In order to avoid this, power must be exchanged from other feeders. A conceivable way to accommodate this is as shown in FIG. 3.

In addition, 20% indicates the work section, and also indicates the box drop or reverse transport section. In order to determine which feeder to use for power interchange, it is necessary to know the magnitude of the load in the reverse feed section and the open/closed status of all MW4, and also to know the supply reserve capacity of each feeder 10. is necessary.

In addition, PSW4 and FCB2 connect section 3 to each other by opening or closing them, but the state of this connection is not fixed, and depends on the magnitude of the load current in section 3 at that time. Connections are changed as appropriate. By the way, by doing this, when performing operations for power interchange, control center operators can prepare for work power outages.
PSW4 and FCB2 are always open/closed, and section 3
It takes a lot of time and effort to monitor and remember the magnitude of the load current.

Because the number of PSW4 is large and the configuration is complicated, it is necessary to use PSW4 and FCB for power interchange due to work power outages.
It is not uncommon for power to be cut off in section 3, which does not require a power outage, due to an erroneous detonation when opening and closing section 2. In consideration of the above points, the present invention automatically performs distribution line operations (changes in switching paths of PSW 4 and FCB 2) for work power outages and power interchange due to work power outages, compared to conventional distribution line operations. This is an attempt to solve the inconveniences of the device, by automatically detecting the PSW 4 and FCB 2 to be operated, preventing deliberate operations, and preventing the creation of unnecessary power outage sections as much as possible.

An example of the distribution line operating device according to the present invention will be described below in detail with reference to the drawings. In the present invention, the same reference numerals are given to corresponding parts as in FIG. 2, and as shown in FIG. 4, the operating console 8 and the TC A distribution line operation processing device 9 having a microcomputer or minicomputer configuration, for example, is provided between the master station 6 and the power distribution line operation processing device 9 .

However, the TC master station 6 is connected to the grid monitoring board 7 as in the conventional case.
Open/close status of PSW4 and FCB2 and feeder 1
The information on the load current of 0 is sent out, and is also sent to the distribution line operation processing device 9 (hereinafter referred to as the operation processing device).

Therefore, the operation processing device 9 always includes PSW4 and FCB2.
The open/close state of the feeder 10 and the load current of the feeder 10 are transmitted. In addition, the operation console 8 instructs the operation processing device 9 as to the section 3 in which a work power outage is to be performed by operating a switch.

Here, the operation processing device 9 always controls the open/closed state of each FCB 2,
feeder currents and PSW4 connected to them
The opening/closing state of the feeder is memorized, and when a work power outage command is received by operating a switch on the operation console 8, a reverse feed section is detected, and power is accommodated from other feeders 10 for the reverse feed section. The work area will then be cut off from power. In this way, in the case of the present invention, the TC master station 6 also transmits the same information to the distribution line operating device 9.

Remote monitoring and control device slave station 5 receives open/close signals for sectional switch 4 and distribution line sheath breaker 2 from switch operation on the operation desk (in the case of the conventional method) or from the distribution line operation processing device (in the case according to the present invention). It has the function of transmitting to. Further, in the case of the present invention, the operation console 8 is provided with a switch for instructing the work section, and has a function of transmitting the signal of the instructed switch to the distribution line operation processing device 9. However, the distribution line operation processing device 9 receives the open/close states of the section switch 4 and the distribution line sheath breaker 2 and the magnitude of the load on the distribution line from the remote monitoring and control device master station 6.

When a work zone is designated by operating a switch on the console 8, in order to shut off the power in that work zone, after detecting the backup feeder and changing the connection to the backup feeder for the reverse feed zone, the section switch 4 and The opening/closing signal of the distribution line cutter 2 is transmitted to the remote monitoring and control device master station 6 to shut off the power in the work section.

The distribution line operating device according to the present invention having the configuration shown in FIG.
Or operate PSW4 as follows. In the following explanation of the operation, an overview of the operation will first be explained, and then a detailed explanation will be given. The device of the present invention generally performs the following detection and operation. '11 Detect the section 3 and false W4 in which power is being transmitted by each FCB 2 (that is, each feeder) in the scheduled order.

{21 Find the load current in each section 3.

[3' Detection of end section within reverse feed section.

Among the collection of sections 3 that are transmitting power through the section where a work power outage is to be implemented, that is, the reverse transmission section, power is not being transmitted to the section 3 that is furthest from the work section, that is, to other sections 3. Detect section 3.

This will be referred to as the terminal section below. '41 Detection of a feeder that accommodates power (backup feeder) '3}
A feeder 10 that can accommodate power in the end section is detected.

(5- Supply surplus current (reserve power) of feeder 10 detected on the operating side of PSW4
Perform the following operation depending on the magnitude of the load current in the end section.

'a} If the reserve capacity is larger, the end section is '
4}, the connection is changed to the feeder 10 detected.

[b- If the reserve capacity is smaller, the relevant end section will be cut off.

[6} Repeat the operation for the terminal section [1} ~
Repeat step (3) until the operation is completed for all sections 3 of the reverse feed section.

‘7) Power outage in the work area Finally, power is cut off in the work area.

With the above operations, the power interchange operation and the work power outage operation accompanying the work power outage are completed.

The above is an overview of the operation. Next, in the system shown in FIG. 2, the operation method when the section 3-7 is used as the work section will be explained in detail below.

[1] Detection of the PSW4 and section 3 to which power is transmitted by each feeder The section 3 that can be connected to the FCB2 and PSW4 is automatically determined at the time of construction or expansion of the distribution line.

The connection relationship is predicted as shown in Table 1 and stored in advance in the memory of the operating device 9.

Table 1 shows the connection relationships in the distribution line in Figure 11 and the F
This is an example of the open/closed states of CB2 and PSW4, and represents section 3 in which power can be transmitted by FCB2 and PSW4. There are two sections 3 that can be connected to the W4, a "starting end section" and a "terminating end section," but the division into the starting end section or the terminal end section is merely a convenient division and has no special meaning. The open/close states of the FCB 2 and PSW 4 transmitted from the TC master station 6 are stored in the memory shown in Table 1 each time they are transmitted. Therefore, Table 1 represents the current open/close states of FCB2 and PSW4. In Table 1, "0" indicates an open circuit state, and "0" indicates an open circuit state.
1'' indicates a closed circuit state. Table 1 Based on the contents of Table 1 thus stored in the memory of the operating device 9, the operating device 9 determines the FCB 2, PSW 4 and section 3 connected to each feeder as described below. Detection is performed in this way, and the data in Table 2 is created.

The second represents the relationship between each FCB 2 and PSW 4 and the sections 3 at both ends thereof, and the section on the inflow side of the dew flow is the power receiving section when viewed from the FCB 2 or PSW 4, and the section on the outflow side of the tortoise flow is the power transmission section.

Second Table Feeder 10-1 Feeder 10-2 Feeter 10-3 Feeter 110-4 Next, a method for creating the second table will be explained by taking the feeder 10-2 in FIG. 1 as an example.

Tables 3 to 6 show the progress until the part related to feeder 10-2 in Table 2 is completed. FCB2
If -2 indicates a closed circuit state in Table 1, the terminal side section 3-6 is in a state where power is being transmitted from the FCB 2-2. (If FCB 2 is in the barrier state, there is no section 3 connected to it.) Register the closed FCB 2-2 and power transmission section 3-6 in the memo IJI of Table 2.
In this way, the state after FCB 2-2 and power transmission section 3-6 are registered is as shown in Table 3. Table 3 Here, since there is no power receiving section 3 in FCB2, the "power receiving section" column is meaningless.

Next, the FCB 2 or PSW 4 that can be connected to the power transmission section (3-6 in this example) registered in Table 2 is detected from Table 1.

This means that if you find the power transmission section from the ``Starting side section'' and ``Terminal side section Kazuki'' in Table 1, it will be registered in the ``FCB or OreWJ'' column.

FCB2 or PSW4 is the FCB2 or IW4 that follows the power transmission section (in this example, 2
12 and 4-7). Among the FCB2 or MW4 found in this way, if the opening/closing state is "closed" and the "power transmission FCB or PSW" in Table 2 is
PSW4 that is not registered in the " column is registered in the relevant power transmission section and lower section (F
Ushi W4 that connects the electrically farthest section from CB2)
(In this example, it is 4-7).

This detected PSW4 is connected to the “power transmission FCB or
At the same time, the power transmission section (in this example, 3-6) is registered in the power transmission FCB or whistle W (in this example, 4-6).
-7) is the power receiving section, so the power transmission section is registered in the "power receiving section Kazuki."The state after being registered is as shown in Table 4. PSW4 newly registered in Table 2 (in this example, 4
From Table 1-1 and Table 2, detect section 3 that is connected to Section 3 (1-7) and registered in Table 2 as section 3 (
In this example, it is 3-7).

Section 3 detected by this (3-7 in this example)
indicates that power is being transmitted from PSW 4 (in this example, it is 4-7), and this section 3 is defined as "" in Table 2.
Register in the "Power transmission section" column. The status after registration is as shown in Table 5. Table 5: Check the connection relationship between PSW 4 and Section 3 as shown in Table 2.
Repeat in sequence until 4 is gone.

As a result, FCB2 connected to feeder 10-2
, PSW4 and section 3 can all be detected,
The status after completion is as shown in Table 6. Table 6 If there is a branch line during the process of checking the connection relationship between PSW 4 and Section 3, please refer to Table 2.
A plurality of towers W4 to be registered in the "W" column may appear.

In such a case, register only one PSW4 in the "Power transmission FCB or PSW" field, and register the remaining PSW4 in the memory in Table 7. After checking all the connections of the former PSW4, the latter PSW4 Check the connections. Regarding the latter, it is sufficient to take out the branched PSW4 registered in Table 7 and check the connection relationship between the false W4 and section 3 using that PSW4 as the starting point.
Table 7 The above-mentioned Table 2 is created for all the feeders 10, and is updated every time the open/closed state of the FCB 2 or the cover W4 changes.

[2] The detection operation list 9 for the load current of each section 3 records each feeder current (transmitted to this device through the TC slave station 5 and the TC master station 6) and the load current of the section 3 connected to the feeder 10. Using the installed capacity, estimate the load current in each section 3 using the following formula.

Here, FL is the feeder current to which section 3-i is connected, NL is the load current of section 3-i, and NCi is the feeder current to which section 3-i is connected.
The installed capacity (current) of ZNCi is the total installed capacity of the section 3 connected to the feeder 10' to which the section 3-i is connected.

Note that this installed capacity is automatically determined at the time of construction or expansion of the distribution line, and does not constantly change. The operation processing device 9 stores the thus obtained load current in section 3 in the memory as Table 8.

Table 8 [3] Detection within Reverse Transmission Section Table 2 shows the connection relationship between Section 3 and Section 3, including the direction of the sending and receiving forces. The terminal section within the reverse section where power is being transmitted can be easily detected using Table 2.

First, the work section specified by the console 8 is section 3-
7, in order to detect section 3 which is receiving power directly from section 3-7 via one PSW 4, "
When searching the "power receiving section" column, section 3-7 is found in the third row of the table for feeder 10-2.

At that time, sections 3-8 shown in the "Transmission Section" column on the same line
indicates that power is being received from section 3-7 via PSW4-8. Next, if the section 3 receiving power from the section 3-8 is searched in the same way, the section 3-9 will be detected.

This process is repeated until a section 3-10 is detected in which no corresponding section is found even if the "power receiving section" column is searched. The fact that this section 3-10 is not detected in the "power receiving section" column means that no power transmission section is connected to section 3-10.
In other words, this indicates that it is the terminal section. [4] Detection of backup feeder A backup feeder for power interchange is detected for the end section of the reverse feed section detected in step [3] above.

First, a cover W4 for connecting the end section (3-10 in this example) to a feeder different from the feeder to which the end section is currently connected is detected.

This extracts PSW4 (in this example, 4-6, 4-10, and 4-14) that can follow the terminal section 3-10 from the "Starting section" and "Terminal section Kazuki" in Table 1, and All you have to do is take out the spots W4 (4-6 and 4-14 in this example) that are currently the checkpoints from this target W4. Detect the other sections on the feeder 10 side (3-5 and 3-15 in this example) of the connected PSW 4 (4-6 and 4-14 in this example) from Table 1, and find that the section 3 is The second step is to determine which feeder is supplying power.
Detection is performed based on which feeder in the table the section 3 is registered.

If other feeder-side sections are not registered in any of the feeders 1 and 1 in Table 2, that section 3 is excluded from the target feeders for power interchange, since it indicates that there is a power outage. The backup feeder is detected as described above, but if there are multiple backup feeders, the feeder with the maximum reserve power (the difference between the feeder's installed capacity (current) and the current flowing through the feeder) is selected as the backup feeder. (In this example, it is assumed to be feeder 10-4).

[5] Operation of PSW4 The terminal section detected in step [4] above (in this example, 3
PSW4 (in this example, 4-14) connecting the backup feeder (10-10 in this example) and the backup feeder (in this example, 4-14) is closed, and then the terminal section is connected to the "power transmission section" column of Table 2. When searched, it is found in the fifth row of the table for feeder 10-2, so PSW4 (4-10 in this example) in the "FCB and duck W" column of that row is operated.

[6] Repeating the operation for the end section Execute the repeating operation as described in the above outline.

[7] Power outage in the work section Since the power interchange operation has been completed by completing the above operation, searching the "Power transmission section" column in Table 2 for the work section (3-7 in this example) will show that the feeder 10 -2 in the second row of the table, so the "FCB and P
By operating the whistle W4 (in this example, 4-7) in the "SW" column, the power is cut off for the work section.

As described above, according to the present invention, by simply instructing the work zone by operating the switch on the operation console 8, the work can be carried out without the assistance of an operator.
I can quickly open and close my W4 for work power outages that involve power interchange. This eliminates the need for control center operators to monitor and memorize the open/close status of PSW 4 and FCB 2 and the magnitude of the load current in section 3 for each power outage. can be prevented from occurring. In addition, for each reverse feed section on the terminal side of the work section, feeders that are capable of power interchange are detected and it is determined whether a power outage is necessary or unnecessary for that reverse feed section. can be made as narrow as possible.

[Brief explanation of the drawing]

Fig. 1 is a single line diagram showing a distribution line system to which the present invention can be applied, Fig. 2 is a system diagram showing a conventional distribution line operating device, and Fig. 3 is a system diagram showing a conventional distribution line operating device.
The figure is a single line diagram for explaining the accommodation of power to the reverse feed section when a work section is specified, and FIG. 4 is a system diagram showing an example of the power distribution foundation spring operating device according to the present invention. 1... Bus line, 2 (2-1, 2-2...)...
...Distribution line disconnector, 3 (3-1, 3-2...
)......section, 4 (4-1, 4-2...)...
...Division switch, 5 (5-1, 5-2...)...
...Distant monitoring and control device slave station (TC slave station), 6...
... Remote monitoring and control device master station (TC master station), 7...
...System monitoring panel, 8...Operation console, 9...
...Distribution line operation processing equipment. Multi 1 drawing Multi 3 drawing Multi 2 drawing Multi 4 drawing

Claims (1)

[Scope of Claims] 1. The opening/closing status of the distribution system's sectional switches and distribution line breakers, as well as the load on each distribution line, is remotely monitored and displayed on a system monitoring panel, and the above-mentioned classification is monitored while monitoring the display. In a distribution line operating device having an operation console capable of opening and closing a switch or a distribution sheath breaker, a distribution line is provided in a signal system between the operation console and the sectional switch or distribution sheath breaker. An operation processing device is provided, and this distribution line operation processing device performs the following functions in order to cause a power outage in the work area when a work area is specified by operating a switch on the operation console. Means for detecting the sections and sectional switches where power is being transmitted by the feeder in the scheduled order (a) Means for determining the load current in each section (c) Means for detecting the end section where power is not being transmitted within the reverse feed section (d) Means for detecting a spare feeder for power interchange (e) Compares the supply margin current of the detected spare feeder with the magnitude of the load current in its end section,
When the supply margin current is larger, the terminal section is connected to the detected spare feeder, and when the supply margin current is smaller, the terminal section is powered off.
Repeat the steps (a) to (d) for the end section until they are completed, and after changing the connection to the backup feeder, open/close the sectional switch and the distribution line breaker. A power distribution line operating device characterized by transmitting a signal.