JP2971186B2 - Automatic check system for switch of distribution system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Object of the Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution system control device, and particularly to a case where a switch of a distribution system is controlled from a long distance, the switch normally operates due to deterioration of a remote control station, a switch control box, and the like, and a setting error. The present invention relates to a switchgear automatic check system of a distribution system for preventing troubles that cannot be operated immediately.

[0002]

2. Description of the Related Art Conventionally, in a power distribution system, a switch is installed to divide a distribution line into an arbitrary customer (load) group. If this switch is controlled from a remote monitoring device installed in a business office, etc., a remote control master station, transmission line, remote control station and switch control box should be installed to control the switch remotely. It is configured. By the way, at the beginning of installation of this switch, it is natural to confirm that the hardware from the remote control device to the switch functions normally by a confirmation test. At present, there is no opportunity to open or close the switch until operation becomes necessary due to a distribution line accident or work stoppage of the distribution line. In recent years, a distribution system control device that automatically operates a distribution system by interconnecting a remote control device and a computer has been actively introduced. The control of the switch is also performed from this distribution system control device.

FIG. 10 shows a configuration example of these conventional devices.
In FIG. 10, FCB1 to 3 constituting a distribution system are distribution line breakers, SW1 to SW10 are switches, all switches are remote control switches, and SW4 and SW7 are in an off state and other switches are shown. Is on. Each switch is provided with a switch control box C1 to C10. Further, remote control stations R1 to R10 are connected to the switch control box of the remote control switch. The remote control master station 22 is connected via the transmission circuit 3. The remote control master station 22 constitutes the remote control device 2 in combination with the remote control console 21. The distribution system control device 1 is a remote control master station.
Connected to 22. Sections K0 to K10 represent customers (loads).

In such a configuration, the remote control switch SW
Numerals 1 to SW10 enable the remote control switches 21 to be operated individually from the remote control console 21 or the distribution system control device 1. Therefore, these telescopic switches were initially installed
From the remote control console 21 or the distribution system control device 1, it is confirmed by a confirmation test that the hardware functions normally. After that, it is necessary to operate the distribution line in the event of a distribution line accident or work stoppage. Operated when it occurs.

[0005]

In the above-mentioned prior art, the switch is opened and closed only when the necessity arises due to a distribution line accident or a stoppage of the distribution line, but the switching operation has been performed until then. There are cases where the operation has not been performed for a long period of time, and the ratio (probability) of malfunction does not increase. If it does not work properly, stopping the work will hinder the work schedule of the post-process,
In addition, in the event of a distribution line accident, the range of the power outage is expanded and the restoration of the power outage is delayed, resulting in a reduction in the reliability of supply of the power distribution system, thereby causing inconvenience. In addition, even if the operator of the distribution system operates the remote control switch arbitrarily from the remote control console to check the operation of the switch, it is not necessary if the current system status of the distribution system is not correctly grasped. There is a risk of causing a sudden power failure. For example, in FIG. 10, if the switch SW2 is inadvertently turned off, the sections K2 to K3 of SW2 to SW4 are cut off, and if the switch SW10 is turned off, the section K10 of the switch SW10 to the terminal is cut off.

In this case, if the switch SW2 is turned off after the switch SW4 is turned on, the sections K2 to K4 of the switch SW2 to SW4 are operated.
3 does not lose power, but the breaker FCB2
It is necessary to consider whether the load can be accommodated in the sections K2 to K3 of SW2 to SW4 from the side. In the case of, since the section K10 ahead of the SW10 is an end section having no interconnection switch, there is a restriction that the SW10 cannot be opened for checking, and the like. There are inconveniences that cannot be easily operated. The present invention has been made in view of the above circumstances, and when a switch of a power distribution system is left unoperated for a long period of time and a switching operation is required for its intended purpose, a false malfunction ( A state in which the switch cannot be operated when the switch is turned on or off is defined as a malfunction.) In order not to cause any inconvenience, the current system state of the distribution system, which is monitored by the distribution system controller, is used. In addition, by automatically examining whether or not the switch can be checked and then performing the switch operation, it is possible to detect malfunctions and malfunctions in advance and automatically check the switch operation of the distribution system, which can manage the operation history of the switch. It aims to provide a scheme.

[Structure of the Invention]

A structure for achieving the above object will be described with reference to FIG. Monitoring and control means 11 for controlling the switch by taking in the state of the switch of the distribution system, the state of the circuit breaker and the current value of the distribution line online, the equipment information of the distribution system and how the respective equipment is currently System information storage means 12 for storing current system status information indicating whether there is a proper connection relationship, and a distribution line check history table and a switchgear check history table for performing an automatic check of the switchgear. History storage means 13 for storing the result of the automatic check of the switch, and a distribution line to be checked is selected from a table possessed by the history means, and the switch belonging to the selected distribution line is automatically operated to determine the abnormality of the switch. Switch automatic check means 14 for judging the presence / absence and storing the check result in the history storage means, switch information provided by the switch automatic check means and the system Based on the information of the current system with the multi-address storage means, constructed from the switching procedure generation means 15 for determining the interchange procedure to the load side healthy section of the virtual fault section of the distribution line.

[Operation] The switch automatic check means 14 requests the switching procedure creating means 15 to obtain the distribution line interchange procedure based on the switch check start data of the history storage means 13. The switching procedure creating means 15 obtains a distribution procedure for the distribution line based on information on the current system in the system information storage means 12. Next, the automatic switch checker 14 selects a switch that can be opened and closed without interrupting the power distribution system based on the interchange procedure, and passes the operation procedure of the selected switch to the monitoring controller 11. The monitoring control means 11 sequentially executes the switch operating procedure, notifies the switch monitoring automatic checking means 14 of the operation monitoring result, and updates the information of the current system in the system information storage means 12. Switch automatic check means 14
The quality of the notified monitoring result is determined, and the operation history information of the history storage unit 13 is updated based on the result.

[0009]

An embodiment will be described below with reference to the drawings. FIG.
1 is a configuration diagram of an embodiment of a switchgear automatic check device of a distribution system according to the present invention. The remote control device 2 in the figure is a device serving as an interface between the power distribution system shown in FIG. 10 and the power distribution system control device 1, and performs an on / off operation of a switch based on a control command from the power distribution system control device 1. Notify the remote station. Further, it has a function of inquiring the remote control station of the ON / OFF state of the switch based on a state grasp command from the distribution system control device 1 and notifying the distribution system control device 1 of the ON / OFF state. The distribution system control device 1 includes a monitoring control unit 11, a system information storage unit 12, a history storage unit 13, a switch automatic check unit 14, and a switching procedure creation unit 15, and each unit functions as follows. The CRT device is a man-machine interface device between the power distribution system control device 1 and an operator.

The monitoring and control means 11 fetches the state of the switch of the distribution system, the state of the distribution line breaker and the current value of the distribution line from the remote control device 2 online, and stores the states in the system information storage means 12. It has a function of notifying the switch automatic checking means 14 and notifying the remote control device 2 of a control command and a state grasping command from the switch automatic checking means 14. The system information storage means 12 has a function of storing system equipment information indicating what kind of connection relationship each facility of the distribution system has and system status information indicating what state each system facility is currently in. have. In the case of the example of the distribution system shown in FIG. 10, a specific configuration of the system facility information and the system state information will be described with reference to FIGS.

FIG. 2 shows data that stores a section Ki that can be connected to the circuit breaker FCB and the switch SW. For example, a terminal section K0 is connected to the circuit breaker FCB1, and a switch SW1 is connected to the switch SW1. This shows that K0 is connected as the start section and K1 is connected as the end section. Hereinafter, the description is omitted because it is the same. FIG. 3 shows data storing the circuit breaker FCB and the switch SW which can be connected to the section Ki. For example, in the section K0, the FCB1 is used as a power-side switch.
SW1 is connected as a load-side switch,
In the section K1, there is a switch SW1 as a power switch, and SW2, SW6, and SW10 are connected as load switches. Hereinafter, the description is omitted because it is the same.

FIG. 4 shows the state of the circuit breaker FCB and the switch SW inputted beforehand, and each time there is a change in the system state, "O
The “N” and “OFF” states are updated data. For example, in the distribution system shown in FIG. 10, the switches SW4 and SW7 are “OFF” and the other switches are “ON”.
It becomes as shown in. The history storage unit 13 has a function of storing a distribution line check history table and a switch check history table, and a function of storing a check result of the switch automatic check unit 14 in order to perform a switch automatic check. The specific configuration of the distribution line check history table and the switch check history table will be described with reference to FIGS. FIG. 5 shows a distribution line check history table, which has the last year, month, day, hour, minute, second, and processing state of the switchline automatic check for the distribution lines F1 to Fm. FIG. 6 shows a switch check history table.
For Wn, the last year, month, day, hour, minute, second, and when the switch automatic check was performed, and presence / absence of abnormality of the check are included.

The switch automatic checking means 14 automatically checks the switches of the power distribution system.
Means to select the distribution line to be checked from the table of
Pass to. Next, based on the interchange procedure obtained by the switching procedure creation means 15, a switch that can be opened and closed without a power outage of the distribution system is selected, and the selected switch is automatically operated to determine whether there is a switch abnormality. It has a function of judging “/ no” and storing the check result in the history storage unit 13. The details of this function will be described later using a flowchart. The switching procedure creating means 15 includes a switch automatic checking means 14.
Virtual accident section information and system information storage means 12 given from
Based on the information of the current system of the distribution line, it has a function to determine the accommodation procedure of the healthy section on the load side of the distribution line. More specifically, it is the same as the ordinary interchange calculation function and is known.

Next, the operation will be described with reference to the flowchart of FIG. When the switch automatic check time comes, the switch automatic check means 14 proceeds with the process according to the following steps. 1) Based on the distribution line check history table shown in FIG. 5, a distribution line whose last execution date, time, hour, minute, and second is old and whose processing state is "not yet processed" is selected as a distribution line to be checked. (Here, FCB1
Suppose that the distribution line is selected. Step S11 2) List the remote control switches belonging to the distribution line to be checked and create a switch table to be checked.
Step S12 The switch table to be checked has the configuration shown in FIG. The switch to be checked in FIG. 9 is a list of switches connected to the FCB 1 based on the system equipment information and system state information shown in FIGS. The ON / OFF check target / completed / unchecked and the same direction check target / completed / unchecked follow the switch check status and will be described as needed.

3) A section K0 closest to FCB1 of the distribution line to be checked (a section immediately after the distribution line breaker, which indicates a section to the next switch and usually has no load) is set as a virtual accident section. The procedure is input to the procedure creating means 15 to have the accommodating procedure output. Step S13 The switching procedure creating means 15 is based on the virtual accident section information, and uses the system equipment information and the system state information of the system information storage means 12 to accommodate the load-side healthy section of the virtual accident section without power outage. Create an accommodation procedure and check the switch automatically 14
And output the accommodation procedure. Example of procedure: Interconnection point SW4
"On", switch SW1 of virtual accident section K0 "Off lock"
Assume that you have Based on the interchange procedure, a candidate switch to be checked for switch ON / OFF is obtained, and "1" indicating that the switch is a candidate switch for switch ON / OFF check is entered in the check target switch table of FIG. Check on / off according to the following procedure. (Specifically, a switch on the route from the interconnection point SW4 to the off-lock switch SW1 is selected as a candidate switch.) The ON / OFF check target is entered based on the above-mentioned interchange procedure.・ It refers to a switch that can be opened and closed without power outage of the distribution system if it is turned off.

4) If the procedure is created, proceed to the next step. Step S14 If the procedure is not created, the processing state of the distribution line is set to "completed", and the next distribution line is selected as the distribution line to be checked. -Step S15 5) Turn on the interconnection point switch SW4.
Step S16 The operation result is determined. Details will be described later.
Step S50 6) Referring to the check target switch table, it is confirmed whether or not the candidate switch has already been checked for ON / OFF of the ON / OFF switch. If the candidate switch does not have the switch ON / OFF checked,
“Complete” is written in the switch table to be checked, and a control command (turning on / off operation) and a state grasping command for the switch are executed via the monitoring control means 11. Step S17 The operation result is determined. Details will be described later.
~ Step S50

7) The operation of item 6 is repeated for the next candidate switch. -Step S188) After checking all the candidate switches, the interconnection point switch SW4 is turned off.
Step S19 The operation result is determined. Details will be described later.
Step S50 9) If there are a plurality of interconnection point switches in the interchange procedure, the operation of the item 5 is repeated. -Step S20 10) The same direction check is performed as the same direction check target for the other switches in which "1" is not written in the ON / OFF check target of the check target switch table. (Currently, the switch should be in the ON state, so execute the ON operation and confirm that there is no abnormality. Execute the same steps as in Sections 6 and 7.)-Step S21 The same direction check target is the ON / OFF operation This means that there is a possibility that the power distribution system will be cut off if the above operation is performed.

11) The distribution line check history table of FIG. 5 updates the last execution date, month, day, hour, minute, and second for the distribution line.
Step S22: Go to the next distribution line to be checked. Next, details of the determination of the operation result of step S50 will be described with reference to FIG. FIG. 8 is for determining whether the operation result of the switch is normal or abnormal. 12) After the on / off operation, the status of the distribution system is grasped via the monitoring control means 11, and the presence / absence of an abnormality is written based on the result. -Step S51-Step S52-Step S53 13) If the switch concerned is normal, the switch check history table is set to abnormal "none", the last check date / time / hour / minute / second are updated, and the "checked" switch table is displayed in the check target switch table. And go to the next step.
-Step S54 If there is the next operation, the operation of item 12 is repeated.
-Step S55 14) If the switch concerned is abnormal, determine "abnormal" in the switch check history table, update the last check date, month, day, hour, minute, and second, enter "Done" in the check target switch table, and enter the next step. Proceed to.
~ Step S56

As in the above embodiment, the remote control switch belonging to the selected distribution line to be checked is listed up in the switch table to be checked by the switch automatic check means, and is closest to the FCB of the distribution line to be checked. By creating a switching procedure with a section as a virtual accident section and performing a switching operation of a candidate switch for performing on / off checking, the switch can be automatically checked without a power outage of the power distribution system. In addition, by performing the same direction check on the switch that could not be checked on / off, the check up to the slave station has been performed.

Other than the above, the following modifications can be considered. Modification 1 The switch automatic check is not started during the accident processing, and the check is stopped when an accident is detected. In addition, even for a remote control switch, a switch whose operation is excluded (operation prohibited) may be excluded from the check. Modification 2 The selection of the interconnection switch is left to the switching procedure creation means. However, if there is another interconnection switch, it is requested to create a switching procedure using the interconnection switch. good. By doing so, the number of candidate switches to be checked on / off increases. Modification 3 In the embodiment of the present invention, the switch is turned on / off at the time of the switch automatic check, but the operation check up to the remote control station may be performed. Modification 4 In the embodiment of the present invention, the operation history is updated at the time of automatic check of the switch. However, the operation history may be updated at the time of normal operation.

[0021]

As described above, according to the present invention, at the preset time, the distribution system control device grasps the current system state and automatically executes the switching operation of the remote control switch. Therefore, it is possible to save the power of the switch check without bothering the operator of the power distribution system, and to detect a malfunction / non-operation state of the switch in advance, thereby contributing to an improvement in supply reliability. In addition, the operation history information of the switch makes it possible to prevent a situation in which the switching operation of the switch is not performed for a long time as in the related art. In addition, in recent years, with the increase in the number of electronic components and higher functionality of components between a remote control master and a switch, the complexity of the devices has increased the possibility of malfunctions due to device degradation and incorrect settings. Therefore, automatic switch check that can detect malfunctions and malfunctions early is effective.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention.

FIG.

FIG.

FIG. 4 shows system facility information.

FIG. 5 is a distribution line check history table.

FIG. 6 is a switch check history table.

FIG. 7 is a flowchart of the present invention.

FIG. 8 is a flowchart for determining an operation result.

FIG. 9 is a switch table to be checked.

FIG. 10 illustrates a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Distribution system control device 2 Remote control device 11 Monitoring and control means 12 System information storage means 13 History storage means 14 Switch automatic check means 15 Switching procedure creation means

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kiyoshi Miyanishi 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (72) Inventor Kisao Ouchi 1-Toshiba-cho, Fuchu-shi, Tokyo (56) References JP-A-3-117324 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02J 3/00-5/00 H02J 13/00- 13/00 311

Claims (1)

(57) [Claims] In a distribution system control device for monitoring and controlling a switch of a distribution system via a remote control device, a state of a switch of the distribution system, a state of a distribution line breaker, and a distribution line current value are taken online. Monitoring and control means for controlling the switch in the, a system information storage means for storing information of the equipment system of the distribution system and information of the current system state indicating what kind of connection relationship these equipments are currently in, Perform automatic checks
Check the distribution line check history table and switchgear.
The switch history table is stored and the switch is automatically checked.
History storing means for storing the result of the
Select the distribution line to be checked from the table
Automatically operates the switches belonging to the specified distribution line.
Judge whether there is any abnormality and store the check result in the history
Switch automatic check means for storing in the means , said switch
Switch information provided by automatic check means and the system
Based on the information of the current system in the information storage means,
A switching procedure creation means for obtaining a procedure for accommodating an electric wire to a healthy section on the load side in a virtual accident section ;