JPH067728B2 - Distribution system monitoring device - Google Patents

Description

Detailed Description of the Invention [Object of the Invention] (Industrial field of application) The present invention provides a power distribution based on switching information of a feeder breaker of a substation and a section switch provided on a distribution line connected to the breaker. The present invention relates to a distribution system monitoring device that automatically grasps loops in a system and notifies operators.

(Prior Art) Generally, a power distribution system has a configuration in which a switch is arranged at each of the division points of a feeder connected to a breaker for a feeder at a substation and a loop point connecting these feeders.
Recently, the distribution system has become more and more complexly connected in order to minimize the power supply disruption and to maintain the distribution system equipment without any problems. It tends to be distributed.

By the way, when a part of such a power distribution system is to be cut off for the purpose of construction work, or when the part where construction work is completed is restored to the original system state, the operator should install a series of feeder breakers and section switches. It is necessary to open and close.

However, in the power distribution system that has been radiated as described above, when an operator opens and closes the breaker for the feeder and the section switch, there is a possibility that a new loop will be generated at a place different from the current state. In this case, it is difficult to quickly detect the occurrence of a new loop because the distribution system is complicated.

In addition, since there are a large number of each switch in the distribution system,
Due to cost constraints, it may not always be possible to use only highly reliable products. Therefore, when a certain section switch is malfunctioning, for example, when a section switch that is closed when a loop is not configured is opened due to a malfunction, the section will be out of power and the malfunction will occur due to a notification from the customer. The operation can be immediately known, but the section switch that is open closes due to a bad operation, and even if a new loop occurs at this time, there is no power outage in that section, so it is possible to immediately know the bad operation. It cannot be done, and the occurrence of a new loop cannot be found. And
When an accident occurs in the loop distribution system at such time,
All the feeder breakers in the loop system trip,
There is a problem that the damage to the power supply and the damage to the distribution system equipment will increase.

(Problems to be solved by the invention) As described above, since the power distribution system is radiated in the past, when the operator performs a series of opening / closing operations of the feeder breaker and the section switch for the purpose of construction, When a failure occurs in the distribution system equipment, there is a problem that it is difficult for the operator to recognize a new loop that occurs in the distribution system.

Now, as a loop detection device in a power system, Japanese Patent Laid-Open No. Sho 60
As disclosed in Japanese Patent No. 241722, a plurality of same voltage blocks are provided for each power system equipment that operates at the same operating voltage in an electric power system formed by connecting a plurality of power system equipment through a plurality of switches. It is classified into 2 types, and the connection state of only the same voltage block that belongs to the switch is determined according to the state of the switch, and the occurrence and elimination of the loop composed of multiple power system facilities of the power system and multiple switches. There is a device that detects and stores this.

However, this loop detection device is for determining the connection state of a plurality of facilities in the electric power system, and even if this loop detection device is used as it is for the radiating electric power distribution system as described above, the operator does not It is difficult to recognize the occurrence of a new loop in the, therefore, the present invention accurately detects the new loop generated with the opening and closing operation of the feeder breaker and the section switch, and the corresponding distribution line and In addition to the display output that displays the classification switch, and for the detection of a new loop other than that, in addition to the display output that displays the corresponding distribution line and classification switch, an alarm output is sent to notify the operator of the loop. It is an object of the present invention to provide a distribution system monitoring device capable of recognizing the occurrence.

[Structure of the Invention] (Means for Solving Problems) In order to solve the problems, the present invention divides a distribution line connected to a feeder circuit breaker in a substation into a plurality of sections, or connects the distribution lines to each other. Between the remote monitoring control device slave station and the remote monitoring control device master station, which are provided corresponding to the feeder breaker and the division switch of the current substation of the distribution system provided with linking section switches, respectively. Taking in information to be transmitted, the open / closed state of the circuit breaker for the feeder, the loop state currently formed in the distribution system, and connection information indicating how each distribution section is currently connected, currently operating A storage device in which each section switch is stored, and is driven at fixed time intervals or when the status of the section switch is changed, and when the status of the feeder breaker and the section switch is changed. Means for fetching status signals of the feeder breaker and partition switch, and information of each of the information fetched by this fetching means and the current status signal of the feeder breaker and partition switch stored in the storage device. And a state change detection means for detecting the presence or absence of a state change, and when the state change detection means detects a state change, the system state is recognized based on the connection information stored in the storage device and the current state is detected. A loop detection unit that detects whether a new loop has occurred in the distribution system or a loop has been released in comparison with a loop state, and the occurrence or cancellation of a loop in the distribution system is detected by this loop detection unit. And an operation state change detecting means for detecting whether or not the loop is due to the partition switch being currently operated stored in the storage device, and the operation state change detection means. If the generation or cancellation of the new loop detected by the loop detection means by the output of the detection means is caused by the section switch currently being operated, the corresponding distribution line and display means for displaying the section switch are provided. It is a thing.

In addition to the above-mentioned components, an alarm output is issued if the generation of a new loop detected by the loop detection means by the output of the operation state change detection means is a new loop other than the partition switch currently in operation. A notification device is provided.

(Operation) Therefore, in the distribution system monitoring device having such a configuration, the electronic computer obtains the status signals of the feeder breaker and the partition switch at regular intervals of the distribution system or when the status of each partition switch changes. The system status is recognized based on the connection information indicating how each distribution line is connected and the status signal of the division switch, and from this system status the generation or cancellation of a new loop is detected. Judgment in comparison with
When it is determined that a new loop has occurred, it is determined whether the change in the status of the category switch that caused this loop is due to the operator's operation. Since the display output of the switch for classifying the electric wire and the loop point is output, the operator can automatically recognize the occurrence of a loop in the distribution system, which can greatly contribute to the prevention of accident expansion and damage to the distribution system equipment. Become.

If it is not due to the operator's operation, the cause of the newly generated loop is not due to the operator's operation by issuing an alarm output in addition to the display output of the corresponding switch for the distribution line and the loop point. Therefore, it is possible to take a quicker response in order to prevent the expansion of the accident.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration example of a distribution system monitoring apparatus according to the present invention together with a distribution system. As shown in FIG.
The feeder circuit breaker 1 that is connected to the bus provided at the substation outlet and automatically opens when a short circuit or ground fault occurs in the distribution line, and the section and section where power is supplied to a set of those connected to the customer Sectional switch 2 used to separate from and
A power distribution system is composed of -1 to 2-6. In this case, the drawing shows the distribution system connected to the feeder breaker of one substation, but in reality, it is a complicated system in which the distribution systems connected to the feeder breakers of a plurality of substations are interconnected. It has a systematic structure.

The open / closed state of the circuit breaker 1 for the feeder is from the remote monitoring control device slave station (TC slave station) 3-1
It is transmitted to the master station) 4. In addition, each section switch 2-1 to 2-
Similarly, the open / closed states of 6, ... TC slave stations 3-2 to 3-7 ,.
To the TC master station 4.

The circuit breaker 1 for feeders and each section switch 2 collected in the TC master station 4 through each TC slave station 3-1 to 3-7.
1-2-6, ... (Here, the case corresponding to one substation is shown, but in reality, it also includes circuit breakers and section switches for feeders of multiple substations) It is taken in when it is driven by a drive signal output from the timer device at regular intervals.
And the status signals of the section switches 2-1 to 2-6, ... Are processed and judged, and the display output thereof and the alarm output as necessary are sent to the notification device 6.

As shown in FIG. 2, the electronic computer 5 is provided with a state change detecting means 7, a loop detecting means 8, a storage device 9 and an operation state change detecting means 10. The function thereof will be described below.

The storage device 9 stores the open / closed states of the feeder breaker 1 and the respective section switches 2-1 to 2-6, ... In the current substation of the distribution system, the loop state currently formed in the distribution system, and the current distribution of each distribution system. The connection information indicating how the sections are connected, and the partition switch currently in operation are stored. The state change detection means 7 is the opening / closing state of the feeder breaker 1 and each of the section switches 2-1 to 2-6, ... Incorporated when the state of the section switch is changed and the current state stored in the storage device 9. The presence or absence of a state change is detected by comparing the open / closed states of the breaker for the feeder and the sectional switch. When the state change detecting means 7 detects a state change, the loop detecting means 8 recognizes the system state based on the connection information stored in the storage device 9, and compares the current loop state with a new one in the distribution system. It detects whether a loop has occurred or has been canceled, and the storage device 9 indicates that a new loop has been generated or canceled.
I write it in. The operation state change detection means 10 is based on the segment switch which is being operated and whose loop is stored in the storage device 9 when the loop detection means 8 detects the occurrence or cancellation of a new loop in the power distribution system. It is to detect whether or not a new loop is generated or released by the section switch which is currently being operated, and outputs the display output of the distribution line and the section switch corresponding to the notification device 6, and is also operated. If it is not through the division switch inside, the alarm output is output in addition to the display output of the corresponding distribution line and division switch.

FIG. 4 and FIG. 5 show the contents of the loop state stored in the storage device 9 and the data table of the operating section switch. In FIG. 4, the loop statuses 1 to n currently formed in the power distribution system are written in the table A, and the contents of the loop distribution line name and the loop point classification switch NO. Are written respectively. Further, in FIG. 5, in Table C, the sectional switch NO. It is written. Although not shown in the figure, the substation NO. , Corresponding to this substation NO. , This feeder N
O. Switch NO. Are respectively written as connection information.

On the other hand, the notification device 6 includes a system display panel simulating an actual power distribution system and an alarm device, and the operation state change detection means 10 described above.
When a display output is output from the system display panel, the corresponding distribution line on the system display panel and the switch section are displayed, for example, and when an alarm output is issued in addition to the display output, the corresponding distribution line on the system display panel is displayed. In addition to the lighting display of the electric wire and the section switch part, an alarm is activated.

Next, the operation of the distribution system monitoring device configured as described above will be described based on the flow chart shown in FIG.

Now, if the switching status signals of the feeder circuit breaker and each switch of the distribution system, which are collected by the TC master station 4, are taken into the computer 5 at regular intervals, it is determined in step 11 whether the status has changed. It is determined whether or not there is no change in state, and the process waits if there is a change in state. Step 1
In 2, it is judged whether the change in status is due to loop occurrence or cancellation by recognizing the system status based on the link information indicating how each distribution line is connected and the status signal of the division switch. If it is determined that the loop is generated or canceled, the loop state is stored in step 13. Then, in step 14, it is judged whether or not this loop is a new loop occurrence based on the comparison with the current loop state, and if it is not a new loop occurrence, it is returned to the initial state and waits, and a new loop occurrence occurs. If there is, an output indicating the corresponding loop distribution line and loop point division switch is output in step 15, and the process proceeds to step 16. In step 16, it is judged whether or not the change in the condition of the switchgear causing the loop is due to the operation of the operator. If it is not due to the operation of the operator, an alarm output is issued in step 17,
No alarm is output if it is operated by the operator.

As described above, whether or not a new loop has occurred in the power distribution system by the state change detection means 7, the loop detection means 8, and the operation state detection means 10 of the electronic computer 5 according to the processing procedure shown in FIG. Since it is determined whether the occurrence is due to the operator's operation and the alarm is issued only when a new loop not due to the operator's operation is generated, the occurrence of a new loop in the distribution system can be promptly performed. Therefore, it is possible to take necessary measures in advance even if a loop that occurs in a complicated distribution system distributed over a wide area leads to an accident. It is possible to prevent equipment damage.

In the above-mentioned embodiment, the case where the circuit breaker for the feeder and the open / close state signal of each section switch from the power distribution system are taken into the electronic computer 5 at regular intervals has been described. You may make it take in the open / close state signal of the breaker for feeders and each division switch only when the open / close state signal changes.

[Effects of the Invention] As described above, according to the present invention, the status signals of the feeder circuit breaker and the partition switch of the power distribution system are fetched by the electronic computer at regular intervals or when the status of each partition switch changes. , Recognize the system status based on the link information indicating how each distribution line is connected and the status signal of the division switch, and from this system status the occurrence or cancellation of a new loop is regarded as the current loop status. If it is judged that a new loop has occurred, it is judged whether the change in the state of the classification switch that caused this loop is due to the operator's operation. In this case, the display output of the corresponding distribution line and loop point classification switch is output, and if it is not due to the operator's operation, the alarm output is output in addition to the display output of the corresponding distribution line and loop point classification switch. So I made it wide Even if a loop that occurs in a complicated distribution system distributed in a range leads to an accident, it is possible to grasp that fact in advance, and it is possible to prevent the accident from spreading and preventing damage to the distribution system equipment. It is possible to provide a power distribution system monitoring device.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a power distribution system monitoring device according to the present invention, FIG. 2 is a configuration diagram of an inside of a computer in the embodiment, and FIG. 3 is a diagram for explaining an operation of the embodiment. FIGS. 4 and 5 are flowcharts for explaining the contents of data written in each table of the storage device. 1 ... Breaker for feeder, 2-1 to 2-6, ... Sectional switch, 3-1 to 3-7, ... Remote monitoring and control device slave station,
4 ... Remote monitoring controller master station, 5 ... Computer, 6 ...
... notification device, 7 ... state change detecting means, 8 ... loop detecting means, 9 ... storage device, 10 ... operation state detecting means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Suzuki, 1st Toshiba Town, Fuchu, Tokyo, Fuchu, Tokyo Plant (72) Inventor Seiichiro Hiraoka 1st, Toshiba Town, Fuchu, Tokyo, Tokyo, Fuchu Plant, Toshiba ( 56) References JP-A-58-172931 (JP, A) JP-A-58-12532 (JP, A)

Claims (2)

[Claims] 1. A breaker for a feeder at a current substation of a distribution system in which a distribution line connected to a breaker for a feeder at a substation is divided into a plurality of sections and a division switch is provided for connecting the distribution lines to each other. And the switching state of the feeder circuit breaker by taking in the information transmitted between the remote monitoring control device slave station and the remote monitoring control device master station, which are provided in correspondence with the respective division switches, and the current distribution system. A storage device in which the loop state formed in and the connection information indicating how each distribution section is currently connected, the partition switch currently in operation are respectively stored, and at regular intervals or the partition switch And a means for receiving the status signal of the feeder circuit breaker and the partition switch, which is driven when the status of the feeder circuit breaker and the partition switch is changed, Status change detecting means for detecting the presence or absence of a status change by comparing each information taken in by the means with the current status signals of the feeder breaker and the division switch stored in the storage device; When a state change is detected by the change detection means, a system state is recognized based on the connection information stored in the storage device, and a new loop is generated in the distribution system in comparison with the current loop state, or Loop detecting means for detecting whether or not the loop is released, and when the loop detecting means detects the occurrence or release of the loop in the power distribution system, the loop is stored in the storage device and is being operated currently. Operation state change detecting means for detecting whether or not a new loop is generated by the output of the operation state change detecting means. Alternatively, if the release is performed by the partition switch which is currently being operated, the distribution system monitoring device is provided with a corresponding distribution line and display means for displaying the partition switch. 2. A feeder circuit breaker for a current substation of a power distribution system in which a distribution line connected to a feeder circuit breaker of a substation is divided into a plurality of sections and a distribution switch is provided for connecting the distribution lines to each other. And the switching state of the feeder circuit breaker by taking in the information transmitted between the remote monitoring control device slave station and the remote monitoring control device master station, which are provided in correspondence with the respective division switches, and the current distribution system. A storage device in which the loop state formed in and the connection information indicating how each distribution section is currently connected, the partition switch currently in operation are respectively stored, and at regular intervals or the partition switch And a means for receiving the status signal of the feeder circuit breaker and the partition switch, which is driven when the status of the feeder circuit breaker and the partition switch is changed, Status change detecting means for detecting the presence or absence of a status change by comparing each information taken in by the means with the current status signals of the feeder breaker and the division switch stored in the storage device; When a state change is detected by the change detection means, a system state is recognized based on the connection information stored in the storage device, and a new loop is generated in the distribution system in comparison with the current loop state, or Loop detecting means for detecting whether or not the loop is released, and when the loop detecting means detects the occurrence or release of the loop in the power distribution system, the loop is stored in the storage device and is being operated currently. Operation state change detecting means for detecting whether or not a new loop is generated by the output of the operation state change detecting means. Alternatively, if the release is performed by the section switch currently in operation, display means for displaying the corresponding distribution line and section switch, and a new loop detected by the loop detection section by the output of the operation state change detection section. A distribution system monitoring device, comprising: a notification device that issues an alarm output if the occurrence of a new loop is a loop other than the currently operating sorting switch.