JP2618905B2 - Automatic creation of system operation procedure in power system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) The present invention is to stop, repair, and restore the equipment that composes the electric power system in order to perform maintenance and inspection of the equipment. And a method for automatically creating a system operation procedure.

(Prior Art) Generally, an electric power system includes a switch of a circuit breaker, and facilities such as a transformer, a transmission line, a bus, and a phase adjusting facility. It is necessary to stop these facilities for maintenance work or for the operation of the power system, and to recover the stopped facilities afterwards. Then, an operation for stopping the facility to be stopped (hereinafter, referred to as a facility to be stopped) is referred to as a “stop operation”, an operation for restoring is referred to as a “restoration operation”, and the operation is performed. The unit is called a “procedure”.

Generally, a system operation when performing a maintenance operation or the like of a facility to be stopped includes a stop operation and a recovery operation, each of which is made up of a plurality of procedures. These operations need to be performed in a predetermined order according to the purpose.
The order is called “operation order”. The stop operation and the restoration operation of the equipment are performed in accordance with the series of system operation procedures in the operation order.

By the way, a computer system has been introduced to automate the power supply operation, and the system procedure for the equipment to be stopped is created after a series of system operation procedures are prepared in advance by the operator for each equipment to be stopped and stored. Alternatively, system operation procedure data patterned in advance for each equipment to be stopped is stored in the computer, and the system operation data for stopping and restoring the same equipment to be stopped is stored. The system operation procedure is being created by reusing things.

(Problems to be Solved by the Invention) However, in such a method, an enormous amount of storage information is required to cope with a stop / restore operation of facilities constituting a large-scale and complicated power system. Considering a case where a plurality of facilities to be stopped (for example, a transformer and a transmission line) are operated at the same time, the combination of facilities to be stopped becomes enormous and cannot be handled. Further, the power system is not constant, for example, operated by changing the system configuration according to various situations. Therefore, if the stored system operation procedure is different from the system state at the time of the operation, the system state cannot be reused as it is. If the reuse is not possible as described above, the operator must correct the stored one or re-create a series of system operation procedures, which is a burden. Further, every time equipment such as a transmission line and a transformer constituting a power system is added, it is necessary to change the stored system operation procedure, which consumes a great deal of time and labor.

The present invention has been made to solve the above problems, and its purpose is to create a system operation procedure for a target equipment to be stopped regardless of the number of equipment to be stopped, the combination, and the state of the power system. Another object of the present invention is to provide a method of automatically creating a system operation procedure in a power system that can reduce the amount of stored information and can cope with a change in system configuration.

[Configuration of the Invention] (Means and Actions for Solving the Problems) The present invention performs a stop operation of a stop target facility to be stopped on a power system in order to perform maintenance and inspection of a facility configuring a power system. In a method for creating a system operation procedure for performing a system operation procedure for restoring a system to be stopped and a facility to be stopped on a computer, a method for creating a system operation procedure for performing the stop operation described below; and Creating a system operation procedure for performing the recovery operation.

The step of creating a system operation procedure for performing a stop operation includes the following steps a) to h).

a) Based on the equipment group information related to the equipment group constituting the power system, the connection information indicating the connection relation of the equipment group, and the switching information of the switchgear on the day of the operation, the shutdown target is changed from the initial system which is the state of the power system on the day of the operation. Assuming a power system state in which the equipment is simulatedly disconnected, b) If there is a non-voltage operated switch in the switchgear to be opened to disconnect the equipment to be stopped, via the non-voltage operated switch A step of assuming the equipment to be connected as the equipment to be stopped, and assuming the state of the power system when the equipment to be stopped to be simulated from the initial system is expanded to the equipment to be stopped; c) Assumed in step b) In the state of the power system that has been shut down, the equipment that has a power outage is checked by examining the electrical connection relationship, and the equipment that is the first equipment to be stopped, the “equipment to be stopped”, is stopped. `` Dependent power outage equipment '', which is the equipment subject to the deemed suspension, and `` Related power outage equipment, '' which is the equipment that has been shut down due to the suspension of the equipment to be stopped and the dependent power outage equipment. A step of classifying the power outage equipment into at least three types; d) if there is a “related power outage equipment” in the classified power outage equipment, the power supply operation switch that is open in the power system state assumed in step b) And e) creating a system operation procedure for turning on a power-supplying operation switch serving as a point at which power can be supplied to the "related stop equipment". E) The equipment to be stopped and the deemed stop in steps a) and b) Creating a system operation procedure for opening the switchgear that has been opened to disconnect the target equipment from the initial system; and f) “subordinate power failure equipment” among the classified power failure equipment. For example, a system operation procedure for extracting a power supply operation switch that is open in the power system state assumed in the above step b) and turning on the power supply operation switch serving as a power supply available point to the “dependent power failure equipment” G) if there is any “related power outage equipment” or “dependent power outage equipment” that has not been rescued from the power outage in the power system state after the step f) processing, the power supply points to these power outage equipment Extracting the power-supplying operation switch, and creating a system operation procedure for turning on the power-supplying operation switch; and h) the steps d), e), and f);
Arranging each system operation procedure in the order of step g) to obtain a system operation procedure for a stop operation.

The step of creating a system operation procedure for performing a recovery operation includes the following steps i) to k).

i) a step of taking out each system operation procedure from the system operation procedure for the stop operation obtained in the step h) in the order of the latest order; j) each system operation procedure being the reverse of the system operation procedure taken out in the step i). Creating a recovery system operation procedure for the system operation procedure; k) arranging the recovery system operation procedure created in step j) in the order extracted in step i) to obtain a system operation procedure for the recovery operation. Step.

Hereinafter, the present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 is a block diagram showing a system configuration for automatically creating a system operation procedure in a power system according to the present invention. In the figure, 1 is a power system, 2 is an online information input device, 3 is an electronic computer, 4 is a current system state storage unit, 5 is a system state storage unit on the same day of operation, 6 is a system operation procedure creation unit, 7 is It is a setting display section. Here, the current system status storage unit 4 stores the switching information of the switching devices of the power system 1 and the facility group information which is the basic configuration data of the power system 1 fetched into the electronic computer 3 by the online information input device 2. Connection information indicating the connection relationship between these equipment groups is stored. In addition, the same information as the current system status storage unit 4 is stored in the operation day system status storage unit 5, and only the switching information of the switch is in the operation day state. This information setting can be set by the operator from the setting display unit 7. Further, the system operation command procedure creating section 6 automatically creates a system operation procedure according to the method of the present invention. Furthermore, the setting display section 7 displays the created system operation procedure, displays the current system state, and displays the system state on the operation day. Then, the operator can set the equipment to be stopped and the system status on the day of the operation.

FIG. 2 shows an example of the electric power system 1 in FIG. The figure is an example of a power system in which substations A, B, C and customer D are connected, and buses B1 to B5, transformer PT1, circuit breakers CB1 to CB9, disconnectors LS1 to LS19, and transmission lines L1 to L1. It consists of L5 equipment. G1 to G3 are power supplies.

Next, the third method of preparing the system operation procedure according to the present invention will be described.
This will be described with reference to FIGS.

First, a power system having a system configuration as shown in FIG. 2 is stored in advance on the operation day system state storage unit 5 in FIG. 1, and the switch state is indicated by the setting display unit 7 in FIG. Is set to In FIG. 2, buses B1, B4,
Power is supplied to B2, B5, the transmission lines L1, L4, L2, and the transformer PT1, the power supply G2 to the transmission line L5, the bus B3, and the power supply G3 to the transmission line L3.

Hereinafter, a specific system operation procedure creation method will be described with reference to FIG. 2 as an example in which the transformer PT1 is set as a stop target facility and a stop / restore operation is performed for maintenance.

In FIG. 3, first, in step S1, in accordance with the flowchart shown in FIG. 4, in the power system state (hereinafter referred to as an initial system) of the day on which the stop / restore operation of the stop target facility is performed, the stop target facility is set. In order to simulate the disconnection from the initial system, the switch associated with the equipment to be stopped is opened in consideration of the switch type in the basic configuration data of the power system. In this case, the related switch is a representative circuit breaker or disconnecting switch which gives priority to the circuit breaker among the group of switches connected to the equipment to be stopped. However, when the switch type of the representative disconnector is operated with no voltage (hereinafter referred to as no-voltage operation), the equipment to be stopped and the equipment connected via the representative disconnector are regarded as the equipment to be stopped. The above processing is repeated.

For example, in FIG. 2, the circuit breakers CB5 and CB
Assuming that 8 is open and other switches are closed, disconnector LS5 is operated without voltage, and other switches are not operated with no voltage, the switch that opens to disconnect transformer PT1 from the initial system Are the representative circuit breaker CB3 and the representative disconnector of the switch group (LS6, CB3, LS7) and (LS5) connected to the transformer PT1. In this case, since the disconnecting switch LS5 is a non-voltage operation, the power transmission lines L1 and L4 connected via the transformer PT1 and the disconnecting switch LS5 are regarded as facilities to be stopped, and the switch is opened when the above processing is repeated. Is a group of switches (LS1, CB1, LS) connected to the transmission line L1.
The representative switch CB2 of the group of switches (LS3, CB2, LS4) connected to the representative switch CB1 and the transmission line L4 in 2). That is, the switches opened in step S1 are the circuit breakers CB3, CB
1, CB2, disconnector LS5.

Next, in step S2, according to the flowchart shown in FIG. 5, the power outage equipment is determined based on the system state created in step S1. This determination is made by examining the electrical connection relationship of the equipment based on the connection data of the power system equipment and the switching state of the switch. Then, the determined power outage equipment,
The equipment to be stopped and the equipment that must be stopped together in order to stop the equipment to be stopped, that is, the equipment regarded as the equipment to be stopped in S1 (hereinafter referred to as the dependent power outage equipment)
And facilities that are out of service due to the suspension of the facilities to be suspended, that is, facilities excluding the facilities to be suspended, subordinate power outages, and facilities that were out of service in the initial system (hereinafter referred to as related power outages). .

For example, in FIG. 2, when the power outage facility determination is performed in a system state in which the equipment to be stopped is disconnected in step S1, the power outage facilities are transmission lines L1, L4, L2, buses B4, B2, B5, and a transformer PT1.
Among the shutdown facilities, the transformer PT1 is the shutdown target facility,
Transmission lines L1 and L4 are subordinate power interruption facilities, and buses B2, B5 and B4 and transmission line L2 are related power interruption facilities.

Next, in step S3, it is determined whether there is a related power outage facility. Then, as a result, when there is no related power failure facility, the process proceeds to step S5, and when there is the related power failure facility, the process proceeds to step S4. For example, in FIG. 2, since the buses B2, B5, and B4 and the transmission line L2 exist as the related power outage facilities, the process proceeds to step S4.

Next, in step S4, if the power failure can be avoided by switching the related power failure facility to another charging facility or another charging facility before stopping the facility to be stopped,
Create a system operation procedure for combined use or switching. In order to create the above procedure, in the system state after the power failure equipment determination in step S2, a switch that has voltage on one of the switches and no voltage on the other (hereinafter referred to as power Operation switch) is extracted,
(With voltage means the state of being electrically connected to the power supply.) Among the extracted switchgears, those switches that were opened in the initial system and that were not opened or stored in step S1 Switches that can supply power to the relevant power outage equipment are selected. Here, when there are a plurality of switches capable of supplying power, one switch close to the power supply belonging to the highest voltage class is selected. Then, by closing the selected switch, a power failure of the related power failure equipment can be avoided. A system operation procedure for turning on the selected switch is created, and the process in step S4 is repeated for all the related power failure facilities.

For example, in Fig. 2, a circuit breaker CB
5, CB8 is extracted. Among them, CB5 is selected as a switch capable of supplying power, and a system operation procedure for closing the switch CB5 is created. By this, buses B2 and B5, transmission line L
2 blackouts can be avoided.

Next, in step S5, when the equipment to be stopped is separated from the initial system in step S1, a system operation procedure of an opening operation for the opened switch is created. For example, in FIG. 2, the circuit breakers CB1, CB3, and CB2 and the disconnector LS5 are targeted.
Create a system operation procedure for each.

Next, in step S6, it is determined whether or not there is a dependent stop facility. If there is no dependent power failure facility, proceed to step S8.If there is a dependent power failure facility, proceed to step S8.
Move to S7. For example, in FIG. 2, since the transmission lines L1 and L4 exist as subordinate power interruption facilities, the process proceeds to step S7.

Next, in step S7, a system operation procedure for restoring the power of the dependent power failure facility is created. In the system state after the power failure equipment determination in step S2, the power supply operation switch is extracted as a power supply available point to the dependent power failure equipment in order to create the above procedure. The subordinate power failure equipment is restored by closing the extracted power supply operation switch. A system operation procedure for turning on the power supply operation switch is created. The process of step S7 is repeated for all the dependent power failure facilities. For example, in FIG. 2, the circuit breaker CB1 is extracted as a powered switch, and a system operation procedure for turning on the switch CB1 is created. As a result, the transmission lines L1 and L4 are restored.

Next, in step S8, it is determined whether there is any dependent power outage equipment or related power outage equipment whose power outage could not be remedied in the processing in step S7, by performing a power outage equipment determination in the system state after the S7 processing. As a result, when there is no power failure facility, the process proceeds to step S10, and when there is a power failure facility, the process proceeds to step S9. For example, in FIG.
B4 exists as a power failure facility (subordinate power failure facility).

Next, in step S9, a system operation procedure for restoring power to the power failure facility that could not be remedied is created. In the system state after the power failure equipment determination in step S8, the power supply operation switch is extracted as a possible power supply point to the power failure equipment that could not be remedied in order to create the above procedure. By closing the extracted charging operation switch, the power failure of the power failure equipment that could not be rescued is restored. A system operation procedure for turning on the power supply operation switch is created. For example, in Fig. 2, the circuit breaker CB2
Is extracted as a powered switch, and a system operation procedure for closing the switch CB2 is created. As a result, the bus B4
Is restored.

As described above, the system operation procedure of the stop operation for the stop target equipment is completed.

Next, in step S10, a system operation procedure for a recovery operation for the equipment to be stopped is created according to the flowchart shown in FIG. That is, this means that the system operation procedure is created so as to return the system state to the initial system after the maintenance, inspection, and the like of the equipment to be stopped are completed. Therefore, paying attention to the system operation procedures created in steps S4, S5, S7, and S9 of the stop operation described above, system operation procedures for restoration for each system operation procedure are created in reverse order. By arranging the system operation procedures created in steps S4, S5, S7, S9, and S10 in the order of creation, a series of system operation procedures of the stop / restore operation for the equipment to be stopped is completed. In this method, the order of operation is also taken into consideration, so that there is no need to rearrange the order.

As described above, the method for automatically creating a system operation procedure according to the present invention can be applied regardless of the number of facilities to be stopped, regardless of the combination, and therefore, when the power system increases and the frequency of system operation increases, It is particularly advantageous and not only saves troublesome and complicated work such as creation and correction of system operation procedures by the operator, but also power outage equipment in a system state in which the equipment to be stopped is separated based on the system state on the day of operation. In order to detect the related power outage equipment and sub power outage equipment, it is possible to create an accurate power system operation procedure that minimizes the power outage range, This has the effect that oversight due to judgment can be prevented. Furthermore, even if there is a change in the system configuration of the power system, it is only necessary to change the connection data indicating the connection relationship of the changed equipment, and there is no need to change the stored system operation procedure as in the past. In addition, there is an effect that time and labor required for the change operation can be saved.

In the above-described embodiment, the case where one stop target facility (PT1) is used is described. That is, in FIG. 2, for example, assuming that two transformers PT1 and bus B2 are to be stopped, first in step S1, the circuit breakers CB1,
Open CB2, CB3, CB4, CB6 and disconnector LS5. Steps
In S2, the equipment to be stopped is the transformer PT1, the bus B2, the related outage equipment is the transmission line L2, the buses B4 and B5, and the subordinate outage equipment is the transmission line L1,
L4. In this case, since there is a related power outage facility, CB8 is extracted as a power-supplying operation switch in step S4, and it can be a switch capable of supplying power. Therefore, a system operation procedure for turning on the switch CB8 is created. After step S5, it is the same as the above-described embodiment, and the present method can be applied to a plurality of facilities to be stopped. That is, the method
It can be seen that it is not affected by the number or combination of the equipment to be stopped.

[Effects of the Invention] As described above, according to the present invention, it is possible to create a target system operation procedure of a target equipment to be stopped regardless of the number, combination, and power system state of the equipment to be stopped, and store it. It is possible to provide a method for automatically creating a system operation procedure in a power system that can reduce the amount of information and can cope with a change in system configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a configuration diagram showing an example of a power system for explaining the present invention,
3 to 6 are flowcharts showing a method for creating a system operation procedure according to the present invention. 1 ... power system, 2 ... online information input device, 3 ...
... Electronic computer, 4 ... Current system status storage unit, 5 ... Operation day system status storage unit, 6 ... System operation procedure creation unit, 7 ...
... Setting display section, A, B, C ... Substation, D ... Consumer, B1-B
5 Busbar, PT1 Transformer, CB1 to CB9 Circuit breaker, LS
1 to LS9… disconnector, L1 to L5… transmission line, G1 to G3… power supply.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tsugio Takeda 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Hiroyuki Suga 1 Toshibacho, Fuchu-shi, Tokyo Higashishiba Fuchu Inside the plant (72) Inventor Pan Inoue 5-2-1, Omika-cho, Hitachi City, Ibaraki Prefecture Inside the Omika Plant, Hitachi, Ltd. (72) Inventor Susumu Watanabe 1-1-2, Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo (56) References JP-A-57-71231 (JP, A)

Claims (1)

(57) [Claims] 1. A system operation procedure for performing a stop operation of a stop target facility to be stopped on a power system in order to perform maintenance and inspection of facilities constituting a power system, and a system for performing a recovery operation of the stop subject facility. In a method for creating a system operation procedure for creating an operation procedure on a computer, the step of creating a system operation procedure for performing the stop operation includes the steps of: a) equipment group information relating to a group of equipment constituting a power system; A step of assuming a power system state in which the equipment to be stopped is simulated from the initial system, which is the power system state on the operation day, based on the connection information indicating the connection relationship and the switching information of the switchgear on the operation day; If there is a non-voltage-operated switch in the switchgear that is opened to disconnect the target equipment, the equipment connected via the non-voltage-operated switch is regarded as the equipment to be stopped, and A step of assuming the power system state when the equipment to be stopped to be simulated from the initial system and expanding to the equipment to be stopped is assumed; c) electrically connecting the equipment to be cut off in the power system state assumed in the step b). The relationship is examined and discriminated, and the "stop target equipment" which is the first equipment specified as the stop target, and the "dependant" which is the deemed stop target equipment that is also stopped to stop this stop target equipment A step of classifying the power outage equipment into at least three types of "related power outage equipment", which is a power outage due to the stoppage of the equipment to be stopped and the dependent power outage equipment; d) If there is a “related power outage equipment” in the power system state assumed in step b), the switching operation switch that is open in the power system state is extracted, and power to the “related power outage equipment” is extracted. E) creating a system operation procedure for turning on the power-operated switch, which is a point at which power can be supplied, e) opening in order to disconnect the equipment to be stopped and the equipment to be assumed to be stopped from the initial system in steps a) and b). F) creating a system operation procedure of an opening operation for the switchgear, and f) if there is a “subordinate power failure facility” among the classified power failure facilities, the power supply system opened in the power system state assumed in step b) above. Extracting the power-operated switch and creating a system operation procedure for turning on the power-operated switch, which is a point at which power can be supplied to the “dependent power failure equipment”; g) In the power system state after the step f) processing, If there is any "related power outage equipment" or "dependent power outage equipment" that has not yet been relieved from the power outage, extract the power supply operation switch that can supply power to these power outage equipment, and Creating a system operating procedure introduced a work switch, h) said step d), step e), step f),
Arranging each system operation procedure in the order of step g) to obtain a system operation procedure for a stop operation; and creating the system operation procedure for the recovery operation, i) the step h). Extracting the system operation procedures from the system operation procedure for the stop operation obtained in the above in order from the latest order; j) recovering the respective system operation procedures in the reverse order of the system operation procedures extracted in the step i). Creating a system operation procedure; k) arranging the restoration system operation procedure created in step j) in the order extracted in step i) to obtain a system operation procedure for restoration operation. A method for creating a system operation procedure in a power system, characterized by the following.