JP3306597B2 - Distribution line switch control method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution line switch control system comprising a sales office device, a substation device, and a distribution line switch control device, which is transmitted from the sales office device via the substation device. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution line switch control device and a distribution line switch control method for controlling a distribution line switch based on control information. The present invention relates to a distribution line switch control device and a distribution line switch control method that are optimal for reducing a power failure time at the time of system power failure restoration by excluding counting of a power-on time at the time of power restoration from a system power failure.

[0002]

2. Description of the Related Art Conventionally, control of a distribution line switch when power is restored after an accidental power failure in a distribution line is disclosed in Japanese Patent Laid-Open No. 62-15 / 1987.
What is described in 6572 gazette is known. At the time of reclosing from an accidental power failure in the distribution line, monitoring of the specific time period is further performed after counting the X time period and Y time period. Although the time limit was not counted, the switch was turned on instantaneously to shorten the power outage time.However, there is no function to distinguish between a distribution line outage and a system outage. Because of the time-sequential feeding method in which the switch is turned on after X time counting, it has been difficult to shorten the power outage time.

FIG. 10 is a time chart showing an example of successful high-speed re-closing in the event of a power outage, and FIG. Generally, the fast reclose time is 0.
It is said to be about 3 seconds. In the case of a 0.3 second power failure until the high-speed reclosing, there is an open delay time (about 0.8 seconds), which is a function of the distribution line switch. Immediately after power transmission, power is transmitted to the entire distribution line and restored. However, even in the same system blackout, the medium-speed reclosing time is 1-2.
Seconds, the opening delay time of the distribution line switch is exceeded, and the distribution line switch is in a no-voltage open state.After the power is restored, the distribution line switch is turned on by the timed progressive method. However, as described above, it took a long time to recover from power recovery.

[0004]

As described above, the prior art does not have a function of discriminating between a distribution line power outage and a system power outage, and it has been difficult to shorten the recovery time when power is restored in a system power outage.

[0005] It is an object of the present invention to reduce a power outage time at the time of power recovery from a system power outage.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a distribution line switch control device which controls the closing of a distribution line switch when power is restored in response to the opening of the distribution line switch due to a power failure . , Distribution line
Power outage detection circuit to detect power outage during power failure
Power failure time counting circuit that counts the
A comparison circuit for comparing with a reference value for power outage classification identification,
If the counted value exceeds the reference value for blackout classification,
And the count value exceeds the reference value for blackout category identification.
And determining the power failure category determination unit and mains failure in the absence, 該停
If the power division judgment unit determines that a distribution line power outage occurs,
Issues a distribution line switch closing command after the set closing time
If the power outage classification judgment unit determines that a system
Sometimes, without setting the closing time,
And a switch closing control unit that outputs an ON command .

[0007]

[0008] The above object also includes a reference value setting unit for storing <br/> conductive segment identification reference value stop connected to the comparator circuit, the reference value setting unit rewrites the power failure classification identification reference value The present invention is also achieved by a distribution line switch control device according to claim 1 , wherein the control device is configured to be capable of being operated.

[0009] The above object is also achieved by a business office via a communication line.
Or the data sent from the substation
Make sure that the stored power failure classification identification reference value is rewritten.
The method is also achieved by the distribution line switch control method according to claim 5 .

The above object is also achieved by turning on the distribution line switch at the time of restoration of the power supply to the opening of the distribution line switch due to the power failure of the distribution line.
Control detects the time of power failure of the distribution line and recovers from the power failure.
The power outage time up to the power outage is counted,
The reference value for section identification is compared, and the counted value is
If it exceeds the standard value for use, it is determined that the distribution line
If the value does not exceed the power outage classification identification reference value,
Judgment, if it is determined that the distribution line power failure, set in advance when power is restored
After the specified time limit, the distribution line switch is turned on and the system
If it is determined, do not set the closing time when power is restored.
This can also be achieved by using a distribution line switch .

[0011]

[0012] The above-mentioned object is also provided that the reference value for blackout section identification is stored in storage means in the distribution line switch control device, and the stored reference value for blackout section identification is rewritten as necessary. This is also achieved by the distribution line switch control method according to the fourth aspect .

[0013] The above object is also achieved by a sales office via a communication line.
Or, the data is sent from the substation ,
The stored power outage classification identification reference value is rewritten.
This is also achieved by the distribution line switch control method according to the fifth aspect .

[0014] The above-mentioned object is further achieved by setting the reference value for identifying a power failure category as a time length sufficient for closing the last distribution switch which is connected to the same distribution line feeder after power recovery from a system power failure. The present invention is also achieved by a distribution line switch control method according to any one of claims 4 to 6 .

[0015]

When a power distribution line is interrupted and / or when a power distribution line is restored from a power outage, the power outage classification determining unit of the distribution line switch control device determines whether the power outage is a distribution line outage or a system outage.
The power-on control mode when a power failure is restored and the distribution line switch is turned on is a timed sequential feed-in control that issues a turn-on instruction to the distribution line switch after a preset time when power is restored from a distribution line power failure. There are a mode and a system power failure input control mode in which a power-on instruction is issued to the distribution line switch without waiting for the preset time when power is restored from a system power failure. According to the judgment of the power outage classification judging unit, the input command selection unit selects the input control of the distribution line switch using the timed sequential input control mode if the power outage is a distribution line outage, and if the power outage is a system outage, Select the power distribution switch-on control by the power failure control mode. Therefore, even during a system blackout medium-speed reclosing in which the switch closing control was performed in the conventional timed sequential feeding control mode (medium-speed reclosing time is usually 1 to 2 seconds), the distribution line switch in the system blackout switching control mode is also used. The power-on control is performed, and the power-on instruction is issued without waiting for the preset time when the power is restored, so that the interruption time of the power supply to the distribution line is reduced.

A power failure detection circuit, a power failure time counting circuit connected to the power failure detection circuit, a backup power supply circuit connected to the power failure time counting circuit, and a comparison circuit connected to the power failure time counting circuit The power outage classification judgment unit configured by the power outage detection circuit detects the power outage of the distribution line, the power outage time counting circuit counts and outputs the power outage time from power outage to power recovery, and the comparison circuit outputs the power outage time counting circuit. The power outage time from the power outage to the power recovery is compared with the power outage classification identification reference value, and it is determined whether the distribution line outage or the system outage is larger, and a power outage identification signal is output. If the power outage time is smaller than the reference value, it is determined to be a system power outage, and if the power outage time is larger than the reference value, it is determined to be a distribution line power outage. The backup power supply circuit performs power supply backup of a power failure time counting circuit that operates during a power failure.

The reference value setting section for storing and storing the power failure section identification reference value is configured to be rewritable, and the power failure section identification reference value is determined according to which position of the switch on the distribution line is installed. You can change the value.

[0018]

Preferred embodiments of the present invention will be described below with reference to the drawings. First, an outline of facilities and systems related to distribution line switch control will be described with reference to FIGS. FIG. 9 shows a skeleton of a general distribution substation using parallel two-line power reception. The power is 66K from the primary transmission substation
V and transmitted to the transformer 5 via the disconnectors 2 and 6 and the circuit breaker 3 at the distribution substation received at 66 KV,
The voltage is reduced to 6.6 KV for distribution by the transformer 5 and supplied to each consumer via a plurality of distribution lines 1.

FIG. 8 shows a control equipment configuration of a distribution line switch provided on the distribution line 1 connected to the distribution substation 7.
The distribution line 1 drawn from the substation 7 is divided into sections 1 to n by a plurality of distribution line switches 12-1 to 12-n. The distribution line switches 12-1 to 12-n are connected to distribution line switch controllers 13-1 to 13-n for monitoring and controlling the distribution line switches 12-1 to 12-n, respectively.
Each of the distribution line switch control devices 13-1 to 13-n includes pole transformers 141-1 to 14n-2 connected to the distribution line 1.
Supply of AC100V from the distribution line 1
None, information such as the on / off state of the distribution line switch 12 is transmitted to the business office 8 via the communication line 11 through the substation device 10 provided in the substation 7.

In the sales office 8, the distribution line switches 12-1 to 12-n are individually turned on and off based on the information on the sections 1 to n of the distribution line 1 transmitted through the substation apparatus 10. Is transmitted to the distribution line switch control devices 13-1 to 13-n via the substation device 10. Each of the distribution line switch control devices 13-1 to 13-n identifies its own station based on the address signal incorporated in the control information and controls the connected distribution line switch 12 to be turned on or off. .
The above is the outline of the distribution line switch control system.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, the configuration of the distribution line switch control device 13-1 will be described with reference to FIG. The distribution line 1 is one substation side based on the distribution line switch 12-1.
The side opposite to the substation is called the two side. The current flowing through the distribution lines 1 on the first and second sides is the pole transformers 141-1 and 141-1.
At 41-2, the voltage is stepped down from 6.6KV to AC100V, and input to the distribution line switch controller 13-1 in parallel.

The distribution line switch control device 13-1 is connected to the pole transformers 141-1 and 141-2, and determines a power failure category based on voltages supplied from the first and second sides. , Power outage classification determining unit 22 and pole transformer 141-
1 and 141-2, a logic unit 16 connected to the power failure classification determination unit 22 and the internal logic logic power supply 24, and a distribution line open / closed connected to the logic unit 16 A switch control unit 15 for outputting a control command to the switch 12-1, and a logic power supply 24 for internal logic and a logic unit 16 for transmitting data to the communication line 11;
And a modem 35 for receiving. The communication line 11 is connected to the substation device 10. Logical part 1
6 and the switch control unit 15 are collectively referred to as a switch closing control unit.
Call .

The logic unit 16 includes a time-sequential transmission input control mode unit 17, a system power failure input control mode unit 19, the time-sequential transmission input control mode unit 17, and a system power failure input control mode unit 19
And an input command selection unit 21 that is connected to the power failure category determination unit 22 and selects the input command from the timed sequential transmission control mode unit 17 and the system power failure mode control mode unit 19 according to the conditions of the power failure category determination unit 22. It is composed of The switch control unit 15 is connected to a closing command selection unit 21.

Next, the operation of the distribution line switch control device 13-1 and the distribution line switch 12-1 at the time of an accidental power failure will be described with reference to FIG.

As described in the section of the prior art, the reopening / closing time is determined in advance for the purpose of system protection depending on where in the entire system the cause of the power failure occurs. In other words, the power outage time of the system due to the recoverable accident is determined by the accident point such that it is shorter in the upper system and longer in the lower system.

A distribution line switch 12-
If there is a power outage longer than the open delay time td of 1 to 12-n,
The distribution line switches 12-1 to 12-n are in a non-voltage-open state, and the distribution line 1 is in a blackout state.

When the input power of the distribution line switch controller 13-1 in section 1 is restored, the distribution line switch controller 13-1
The power outage classification determination unit 22 determines whether a distribution line power outage or a system power outage occurs, and outputs a power outage identification signal to the input command selection unit 21.

When the power outage classification determining section 22 determines that the power outage category is a distribution line power outage and outputs a power outage identification signal indicating a power outage in the distribution command selection section 21, the input command selection section 21 performs time-sequential transmission. The input control mode unit 17 is selected, and a timed sequential input command 18 is output to the switch control unit 15. After the operation time tu1 of the distribution line switch control device 13-1 has elapsed, the switch control unit 15 further switches on the closing time t.
After counting x1, a distribution line switch-on signal 34 is output to the distribution line switch 12-1. Distribution line switch 12
-1 is input after the self-operation time tu2, and the power is restored.

As for the operation in the section 2 and thereafter, similarly to the case of the section 1, after the operation time tu of the distribution line switch control device 13-1, the closing time tx and the distribution line switch operation time tu are sequentially changed. Power failure will be restored.

When the power outage classification is determined by the power outage classification determining unit 22 to be a system power outage, and a power outage identification signal indicating a system power outage is output to the instructing command selecting unit 21,
In 1, the system power failure input control mode unit 19 is selected, and a system power failure input command 20 is output to the switch control unit 15. The switch control unit 15 includes a distribution line switch control device 13-
After the input power is restored, the distribution line switch-on signal 34 is sent to the distribution line switch 12-1 (without counting the closing time tx1) after the operation time tu1 of the distribution line switch control device 13-1. Output. The distribution line switch 12-1 is turned on after the self-operation time tu2 to recover from power failure.

Similarly, in the operation after the section 2, the power failure is recovered after the operation time tu of the distribution line switch control device 13-1 and the operation time tu of the distribution line switch.

Next, a second embodiment will be described with reference to FIGS. FIG. 3 shows a distribution line switch controller 13-
1 is a configuration diagram of a power outage classification determination unit 22 provided inside 1. FIG. The power outage classification determining unit 22 includes a pole transformer 141-1, 1
4-2, distribution line switch control device 13
Power failure detection circuits 25-1 and 25-2 for detecting a power failure on the input power supply 1 side and the 2 side of
A power failure time counting circuit 28 connected to the power failure time counting circuit 25-2 via an AND circuit and counting the power failure time on both sides of the first and second power failures; and a power failure time counting circuit connected to the power failure time counting circuit 28 A comparison circuit 29 for comparing the power failure time value output by the power failure classification unit 28 with a power failure classification identification reference value and outputting a power failure identification signal 23, and a reference value connected to the comparison circuit 29 and storing the power failure classification identification reference value It comprises a storage circuit 30 and a backup power supply circuit 27 connected to the power failure time counting circuit 28 and backing up the power of the power failure time counting circuit 28 during a power failure. The power failure time counting circuit 28,
The comparison circuit 29 and the reference value storage circuit 30 constitute a power outage classification detection circuit 26.

Referring to FIG. 4, the operation of the distribution line switch control device 13-1 and the distribution line switch 12-1 at the time of a power failure will be described.

The distribution line switch 12-
When there is a power failure for the opening delay time td of 1 to 12-n or more, the distribution line switches 12-1 to 12-n are in a no-voltage release state, and the distribution line 1 is in a full-area power failure.

In the distribution line switch control device 13-1 in the section 1, the power failure is detected by the power failure detection circuits 25-1 and 25-2 at the same time as the input power failure of the distribution line switch control device 13-1. Under the backup power supply circuit 27, the power failure time counting circuit 28 starts counting the power failure time.

The power failure time counting circuit 28 stops counting the power failure time and outputs the power failure time value to the comparison circuit 29 at the same time when the input power of the distribution line switch control device 13-1 is restored. The comparison circuit 29 includes a reference value storage circuit 3 stored in advance.
The power failure time identification value of 0 is compared with the power failure time value output from the power failure time counting circuit 28, and if the power failure time value is smaller than the power failure time classification reference value, it is determined that the system power failure, and if the power failure time value is larger, the distribution line power failure is determined. And a power failure identification signal 23 including the determination result.
Is output.

The reference value for the classification of the power failure in the reference value storage circuit 30 is set to the maximum value of the power failure time determined by the system protection coordination (the power failure time value at the time of a middle-speed reclosing success accident), The operation time of each of the switchgear control device and the distribution line switchgear is added, and is set to an optimum value for each distribution line switchgear control device in each section.

When the power failure identification signal 23 output from the power failure classification determining unit 22 indicates a system power failure, the power-on command selecting unit 21
Selects the system power failure input control mode unit 19 and outputs a system power failure input command 20, which is the output of the system power failure input control mode unit 19, to the switch control unit 15.

The switch control unit 15 receives the system power cut-off command 20 and, after the operation time tu1 of the distribution switch control unit 13-1, sends a distribution switch open signal to the distribution switch 12-1. 34 is output.

The distribution line switch 12-1 has a self-operation time t.
It is turned on after u2, and the power is restored. Similarly, in the operation in the section 2 and thereafter, the power failure recovery is sequentially performed after the operation time tu of the distribution line switch control device 13. The power failure identification signal 23
Is identified as a distribution line power failure, the input command selection unit 21
Selects the timed sequential feed control mode unit 17, and the subsequent operation is the same as that described in the first embodiment.

Next, FIG.
This will be described with reference to FIG. In the third embodiment, the reference value for power outage classification identification in the reference value storage circuit 30 is earlier than the maximum value of the system outage time (the power outage time value at the time of a middle-speed reclosing success accident) in the second embodiment. In addition to the setting of the distribution line switch control device of the section and the operation time of the distribution line switch, the setting is made for each section of the distribution line switch control device. All the distribution line switch control devices and distribution line switches connected to the same distribution line feeder for a time sufficient for the switch to be turned on, that is, the maximum value of the system blackout time (the power failure time value when the medium speed reclosing is successful) And the total value of the operation times is added, and all the distribution line switch control devices connected to the same distribution line feeder are set to the same value. The configuration and operation are the same as in the second embodiment.

Next, a fourth embodiment will be described with reference to FIGS. FIG. 5 is a configuration diagram of the power failure section determination unit 22 provided inside the distribution line switch control device 13-1 of the first embodiment.

The power outage classification determining unit 22 includes a pole transformer 141.
-1 and 141-2, respectively, which detect power failures on the input power supply 1 and 2 sides of the distribution line switch control device 13-1, and a power failure detection circuit 2
1 connected to 5-1 and 25-2 via an AND circuit.
A power failure time counting circuit 28 that counts a power failure time under the condition of both-side power failure on both sides, a power failure time value connected to the power failure time counting circuit 28 and output by the power failure time counting circuit 28, and a power failure classification identification reference. A comparison circuit 29 that compares the values and outputs a power failure identification signal 23, a reference value setting unit 31 connected to the comparison circuit 29 to output a power failure classification identification reference value, and a power failure connected to the power failure time counting circuit 28 During this time, the power supply is constituted by a backup power supply circuit 27 for backing up the power supply of the power failure time counting circuit 28. The power failure time detecting circuit 26 and the comparison circuit 29 constitute a power failure classification detecting circuit 26. The reference value setting unit 31 includes a distribution line switch controller 13-
1 and is a mechanism that facilitates setting changes.

The operation of the distribution line switch control device 13-1 and the distribution line switch 12-1 at the time of an accidental power failure will be described with reference to FIG.

At any point in the entire system, a distribution line switch 12-
If there is a power outage of 1 to 12-n or more than the open delay time td, the distribution line switches 12-1 to 12-n are in a voltage-free state, and the distribution line 1 is in a full-area power outage.

In the distribution line switch controller 13-1 in the section 1, the power failure is detected by the power failure detection circuits 25-1 and 25-2, similarly to the input power failure of the distribution line switch controller 13-1. The power failure time counting circuit 28 starts counting the power failure time under the backup power supply circuit 27.

The power outage time counting circuit 28 stops counting the power outage time and outputs the power outage time to the comparison circuit 29 at the same time when the input power of the distribution line switch control device 13-1 is restored.
The comparison circuit 29 compares the preset power failure section identification reference value of the reference value setting unit 31 with the power failure time value output from the power failure time counting circuit 28, and determines that the power failure time value is greater than the power failure section identification reference value. If it is smaller, it is determined to be a system power failure, and if it is larger, it is determined to be a distribution line power failure, and a power failure identification signal 23 is output to the input command selector 21.

The power outage classification identification reference value of the reference value setting unit 31 capable of setting the variable length is set to a power outage classification identification value adapted to the installation conditions for each distribution line switch control device.

If the received power failure identification signal 23 indicates a system power failure, the power-on command selecting unit 21 selects the power failure power-on control mode unit 19 and outputs a power failure power-on command 20 to the switch control unit 15. .

The switch control unit 15 receives the system power failure input command 2
After receiving 0, the distribution line switch-on signal 34 is output to the distribution line switch 12-1 after the operation time tu1 of the distribution line switch control device 13-1. Distribution line switch 12-1
Is turned on after the self-operation time tu2 after receiving the distribution line switch-on signal 34, and the power failure is recovered.

Similarly, the operations after the section 2 are sequentially performed in the same manner.
After the operation time tu of the distribution line switch control device 13, the power failure is restored. If the power failure identification signal 23 indicates a distribution line power failure, the input command selection unit 21 selects the timed sequential transmission input control mode unit 17, and the subsequent operations are the same as described in the first embodiment. Become.

Next, a fifth embodiment will be described with reference to FIGS. FIG. 6 is a configuration example of the power failure category determination unit 22 and the logic unit 16 provided inside the distribution line switch control device 13-1 according to the first embodiment. The power outage classification determination unit 22 includes power outage detection circuits 25-1 and 25-2 that detect power outages on the input power supply 1 and 2 sides of the distribution line switch control device 13-1, and 1 and 2 power outage detection circuits.
A power failure time counting circuit 28 that counts the power failure time under the condition of a power failure on both sides of the power supply and a comparison circuit 29 that compares the power failure time value from the power failure time counting circuit 28 with a reference value and outputs a power failure identification signal 23. The power supply includes a section detection circuit 26 and a backup power supply circuit 27 for backing up a power supply of a power failure time counting circuit 28 during a power failure.

The logic unit 16 is connected to the time-sequential power-on control mode unit 17, the system power-off power-on control mode unit 19, the comparison circuit 29, the time-sequential power-on power-on control mode unit 17, and the system power-on power-on control mode unit 19. A switching command selection unit 21 for selecting switching commands from the timed sequential transmission control mode unit 17 and the system power failure switching control mode unit 19 based on the condition of the power failure identification signal 23 from the power failure classification determining unit 22; Value setting data 36 transmitted from the office device 9 via the
A setting data conversion unit 33 for exchanging the setting data of the section type, the number of sections, and the reference time allocated to the reference value setting data via the modem 35 to a reference value, and a power outage from the setting data conversion unit 33 A reference value storage unit 32 that stores the reference value for section identification and outputs the reference value for section identification to the comparison circuit 29 of the power outage section determination unit 22 is provided.

The operation of the distribution line switch control device 13-1 and the distribution line switch 12-1 in the event of a power failure will be described with reference to FIG.

At any point in the entire system, a distribution line switch 12-
When there is a power failure for the opening delay time td of 1 to 12-n or more, the distribution line switches 12-1 to 12-n are in a no-voltage release state, and the distribution line 1 is in a full-range power failure. In the distribution line switch control device 13-1 of the section 1, the distribution line switch control device 13-
Power failure detection circuits 25-1 and 25
At 5-2, a power failure is detected, and the power failure time counting circuit 28 starts counting the power failure time under the backup power supply circuit 27. The power outage time counting circuit 28 stops counting the power outage time at the same time when the input power of the distribution line switch control device 13-1 is restored, and outputs the power outage time value to the comparison circuit 29. The comparison circuit 29 compares the power outage classification identification reference value stored in the pre-stored reference value storage unit 32 with the power outage time value of the power outage time counting circuit 28, and if the power outage time value is smaller than the power outage classification identification reference value, The power failure is determined to be a power failure of the distribution line, and a power failure identification signal 23 is output to the input command selecting unit 21. The reference value for power outage classification identification in the reference value storage unit 32 is the substation apparatus 1
The set data of the section type and the number of section reference times assigned to the reference value setting data 36 transmitted from the business office device 9 via the “0” are converted into reference values for blackout section identification by the setting data conversion unit 33, and Are stored as power outage classification identification reference values according to the installation conditions of the distribution line switch control device.

If the received power failure identification signal 23 indicates a system power failure, the power-on command selection unit 21 selects the power failure power-on control mode unit 19 and outputs a power failure power-on command 20 to the switch control unit 15. .

In the switch control unit 15, after the operation time tu1 of the distribution line switch control device 13-1, the distribution line switch 12
For −1, a distribution line switch-on signal 34 is output.

The distribution line switch 12-1 has a self-operation time t.
It is turned on after u2, and the power is restored. Similarly, in the operation in the section 2 and thereafter, the power failure recovery is sequentially performed after the operation time tu of the distribution line switch control device 13. The power failure identification signal 23
Is identified as a distribution line power failure, the input command selection unit 21
Selects the timed sequential feeding control mode unit 17, and the subsequent operation is the same as that described in the first embodiment.

In each of the above embodiments, whether the power failure is a system power failure or a distribution line power failure is based on the length of the power failure time. However, it is not always necessary to refer to the length of the power failure time.
In FIG. 8, for example, when a ground fault occurs in the distribution line 1 downstream of the substation 7, the circuit breaker 3 opens to cause a power outage of the distribution line 1 (distribution line outage) and protect the upstream system. . On the other hand, if an accident occurs on the upstream side of the substation 7,
Since the circuit breaker opens further upstream from the accident occurrence point to cause a power failure (system power failure), the relative relationship between the operation time of the circuit breaker 3 and the power failure time is different from that in the case of the distribution line power failure. Therefore, a means for detecting the relative relationship between the operation start time of the circuit breaker 3 and the time of the power failure is provided as a power failure classification judging unit.
When the operation start time is before the time of the power failure, the power failure identification signal 23 indicating the distribution line power failure is output, and otherwise, the power failure identification signal 23 meaning the system power failure is output. The same effect as the example can be obtained.

[0060]

According to the present invention, it is possible to distinguish between a distribution line power outage and a system power outage.
Since the switch is turned on without performing the turn-on time count when the power is restored, the power outage time of the entire distribution line at the time of the system power outage medium-speed reclose is reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram of a distribution line switch control device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of an operation by the apparatus of FIG. 1;

FIG. 3 is a block diagram illustrating a configuration of a power outage classification determining unit according to the embodiment of the present invention.

FIG. 4 is an operation explanatory diagram of the second and third embodiments of the present invention.

FIG. 5 is a block diagram illustrating a configuration of a power failure classification determination unit according to a fourth embodiment of the present invention.

FIG. 6 is a block diagram illustrating a configuration of a power failure classification determination unit and a logic unit according to a fifth embodiment of the present invention.

FIG. 7 is an operation explanatory diagram of the fourth and fifth embodiments of the present invention.

FIG. 8 is a block diagram showing an example of a control facility configuration of a distribution line switch to which the present invention is applied.

FIG. 9 is a skeleton diagram showing a configuration example of a general distribution substation.

FIG. 10 is an explanatory diagram of an operation at the time of a high-speed reclosing success accident.

FIG. 11 is an explanatory diagram of an operation according to the conventional technology at the time of a middle-speed reclosing success accident.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Distribution line 2 Disconnector 3 Breaker 4 6.6 kv bus 5 Transformer 6 Disconnector 7 Substation 8 Sales office 9 Sales office device 10 Substation device 11 Communication line 12-1 to 12-n Distribution line switch 13- 1-13-n Distribution line switch control device 141-1-14n-2 Pole transformer 15 Switch control unit 16 Logic unit 17 Timed sequential feed control mode unit 18 Timed sequential feed command 19 System power failure input control mode Unit 20 system power failure input command 21 power-on command selection unit 22 power failure classification determination unit 23 power failure identification signal 24 logical power supply 25-1, 25-2 power failure detection circuit 26 power failure classification detection circuit 27 backup power supply circuit 28 power failure time counting circuit 29 comparison circuit REFERENCE SIGNS LIST 30 Reference value storage circuit 31 Reference value setting unit 32 Reference value storage unit 33 Setting data conversion unit 34 Distribution line switch-on signal 35 Modem 36 Reference value setting Data

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Osamu Ishida 3-7-1, Ichibancho, Aoba-ku, Sendai, Miyagi Prefecture Tohoku Electric Power Co., Inc. (72) Inventor Masahiro Oikawa Ichibancho, Aoba-ku, Sendai, Miyagi Prefecture 3-7-1, Tohoku Electric Power Co., Inc. (56) References JP-A-62-156572 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02H 7/22 H02J 13 / 00 311

Claims (7)

(57) [Claims] A power distribution switch control device for controlling the switching of a distribution line switch when power is restored in response to the opening of the distribution line switch due to a power failure. Electric
Power outage time counting circuit for counting time in
There is a comparison circuit that compares the numerical value with the reference value
When the counted value exceeds the reference value for power outage classification identification,
Judgment of a distribution line power failure
And if you do not exceed the value mains failure and determines the power failure category determination unit, if該停electrostatic category determination unit determines that the distribution line power failure, power recovery
Command to turn on the distribution line switch after a preset time limit
Is output, and when the power failure classification determination unit determines that a system power failure has occurred,
Distribution line switch without setting the closing time when power is restored
And a switch closing control unit for outputting a closing command . 2. A power supply system comprising: a reference value setting unit connected to a comparison circuit for storing a reference value for power outage classification identification;
The distribution line switch control apparatus according to claim 1 , wherein the power failure section identification reference value is configured to be rewritable. 3. An office and a substation connected via a communication line.
The reference value setting unit is operated by the sales office or
Power outage classification identification
The distribution line switch control device according to claim 2, wherein the quasi-value is rewritten . 4. Opening of a distribution line switch due to a power outage of a distribution line.
In the control of switching on the distribution line switch when power is restored to the
The power failure time count value and the power failure classification identification standard
Compare the values, and the count value exceeds the reference value for blackout category identification.
If there is a power outage, it is determined that there is a
If it does not exceed the separate reference value, it is determined to be a system power failure, and if it is determined to be a distribution line power failure, a preset
After the on-time limit, the distribution line switch was turned on, and it was determined that the system was out of service.
If the power supply is restored,
Distribution line switch control method characterized by switching on
Law . 5. A power failure classification identification reference value claims, characterized in that rewriting is optionally are stored in the memory means in the distribution line switch control unit, the stored power failure classification identification reference value required Item 6. The distribution line switch control method according to Item 4 . 6. A transmission from a sales office or a substation via a communication line.
The stop stored in the storage means by the output data.
The contract value characterized in that the reference value for
Distribution line switches control method according to Motomeko 5. 7. The power failure identification reference value is set as a time length sufficient for closing the last distribution line switch connected to the same distribution line feeder after a power failure after a system power failure. The distribution line switch control method according to any one of claims 4 to 6 .