JP2012253902A - Method and device for changing electric power system model - Google Patents

Abstract

A simple diagram for training is changed by a simple method.
In a system data generator for training 1 that changes the configuration of a basic system model that is a model of an electric power system having a plurality of facilities including busbars and branches, an object to be changed in the power system model via an input unit 30. By replacing the information on the plurality of facilities and the line constant of the facility after the change as pseudo-offline data, and replacing the plurality of facilities to be changed with one facility having the line constant in the pseudo-offline data. The plurality of facilities to be changed are changed. The change of equipment is characterized by contraction of equipment arranged in series or in parallel or conversion to dummy equipment.
[Selection] Figure 1

Description

  The present invention relates to a technique of a power system model changing method and a power system model changing apparatus for changing a model of a power system for training.

The power supply operation of the power system is monitored and controlled at each of the central power supply command station, the main power supply station, and the power supply control station according to the voltage class.
Then, in each of the central power supply command station, the main power supply station, and the power supply control station, data of a single-line connection diagram (hereinafter referred to as a single connection diagram) is generated with the power system that is in actual operation, and this single connection diagram is generated. It is used for monitoring and control work. Such a single diagram is used not only for confirming the status of system operation during normal times, but also for grasping the state at the time of an accident and accurately determining the recovery operation for the accident.

  Patent Document 1 discloses a system model creation method, a power flow calculation device, and a program thereof that can cope with any connection between facilities in an electric power system and can improve the processing performance of power flow calculation.

JP 2003-219557 A

By the way, in recent years, due to the liberalization of power system monitoring and control work, etc., operators have been required to be trained in normal system operation and accurate in system operation at the time of failure.
In general, a system for performing training work for monitoring and controlling the power system is separated from an operation system for performing power supply operation work in an actual power system (hereinafter referred to as an actual power system).

Here, there are offline maintenance and online maintenance in power system maintenance.
Offline maintenance is maintenance performed on a maintenance terminal that is not connected to the actual power system, and the result of the maintenance is reflected in the data in the system after it is sent to the server in the system. is there. The online maintenance is a maintenance performed on a server in the system and the result of the maintenance is immediately reflected in the system. Online maintenance is used for maintenance with small changes such as monitoring changes, and offline maintenance is performed according to changes in the bus structure of the actual power system and used for maintenance with large changes.

In the conventional training business system, a process for performing online maintenance is prepared, but a process for performing offline maintenance for training is not prepared. That is, a method for greatly changing the configuration of the power system for training is not prepared.
Therefore, in the conventional training business system, a method of performing offline maintenance on the training power system is performed by reflecting the result of the operational offline maintenance in the training business system. However, such a method is troublesome, and there is a problem that the burden on the user increases. In addition, it is difficult to train in a power system that is different from the actual power system, such as a power system scheduled to be used in the future, a power system improved from the actual power system, or a newly created power system.

  Note that Patent Document 1 includes a description that the facilities are gathered and a description that a DC (Direct Current) unnecessary facility is omitted. However, no specific method is described for the method of organizing facilities, and for the method of omitting DC unnecessary facilities, all nodes are searched on the device side, and the device side determines DC unnecessary facilities. There is a problem that the setting and processing become complicated.

  The present invention has been made in view of such a background, and an object of the present invention is to change a single diagram for training by a simple method.

In order to solve the above problems, the present invention is a power system model changing method by a power system model changing device that changes the configuration of a power system model that is a model of a power system having a plurality of facilities including busbars and branches, The power system model changing device receives, via the input unit, information on a plurality of facilities to be changed in the power system model and attribute information on the equipment after the change, and the plurality of facilities to be changed. The plurality of facilities to be changed are changed by replacing with one facility having the attribute information.
Other solutions will be described as appropriate in the embodiments.

  According to the present invention, a single figure for training can be changed by a simple method.

It is a figure which shows the structural example of the system | strain data generation apparatus for training which concerns on this embodiment. It is a figure which shows the example of a general single figure. It is a flowchart which shows the procedure of the production | generation process of the single figure for training which concerns on this embodiment. It is a figure for demonstrating the pseudo | simulation offline maintenance which concerns on this embodiment. It is a figure which shows the example of a basic system change. It is a flowchart which shows the detailed procedure of the basic system change which concerns on this embodiment.

  Next, modes for carrying out the present invention (referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate.

"System configuration"
FIG. 1 is a diagram illustrating a configuration example of a training system data generation device according to the present embodiment.
A training system data generation device (power system model change device) 1 includes a processing unit 10, an equipment data storage unit 21, a basic system data storage unit 22, a pseudo offline maintenance data storage unit 23, and a change data storage unit. 24, a changed basic system data storage unit 25, an opening / closing device data storage unit 26, an input unit 30, and a display unit 40.
The processing unit 10 further includes a basic system data generation unit 11, a pseudo offline maintenance unit 12, a change data generation unit 13, a basic system change unit (power system change unit) 14, and an analysis calculation unit 15.

The basic system data generation unit 11 generates basic system data from the facility data based on information input via the input unit 30 and stores the basic system data in the basic system data storage unit 22. Here, the basic system is a basic power system model (power system model) generated from the facility data, and is displayed on the display unit 40 in the form of a single connection diagram.
The pseudo offline maintenance unit 12 contracts the equipment or replaces it with a dummy equipment, and stores the pseudo offline maintenance data (equipment information and attribute information) as a result of the processing in the pseudo offline maintenance data storage unit 23.

The change data generation unit 13 is a change that is temporary data necessary for processing by the basic system change unit 14 from the pseudo offline maintenance data in the pseudo offline maintenance data storage unit 23 and the basic system data in the basic system data storage unit 22. Data is generated and stored in the change data storage unit 24.
Based on the change data in the change data storage unit 24 and the switchgear data in the switchgear data storage unit 26, the basic system changer 14 contracts the equipment in the basic system single diagram, The basic system is changed, such as replacement, and the result is stored in the changed basic system data storage unit 25 as changed basic system data.
The analysis calculation unit 15 performs a tidal current calculation for training on the changed basic system data.
Details of the processing in each of the units 11 to 15 will be described later.

The equipment data storage unit 21 stores equipment data that is information about each equipment. Information stored as equipment data includes, for example, equipment unique numbers (equipment information), equipment line constants (resistance values, reactance values, etc .: attribute information), and applicable equipment. This is the equipment unique number of the connected equipment.
The basic system data storage unit 22 stores basic system data obtained by extracting information necessary for analysis calculation performed later from the equipment data.
The pseudo offline maintenance data storage unit 23 stores pseudo offline maintenance data that is a result of performing pseudo offline maintenance on the equipment data.

The change data storage unit 24 stores change data that is generated based on the pseudo offline maintenance data and the basic system data and is temporary data for performing a basic system change to be performed later.
The changed basic system data storage unit 25 stores changed basic system data that is basic system data changed by the basic system changing unit 14.
The switchgear data storage unit 26 stores switchgear data that is information relating to the on / off of the switch.

The input unit 30 is an input device such as a keyboard or a mouse, and the display unit 40 is a display device such as a display.
The processing unit 10 and each of the units 11 to 15 have programs stored in a ROM (Read Only Memory) or HDD (Hard Disk Drive) expanded in a RAM (Random Access Memory) and executed by a CPU (Central Processing Unit). To be realized.

<Example of single connection>
FIG. 2 is a diagram illustrating an example of a general single diagram.
In the single view, reference numeral 101 is a bus equipment, reference numeral 102 is a transformer device, reference numeral 103 is a power transmission line, reference numeral 104 is an LS (Line Switch) equipment, and reference numeral 105 is a CB (Circuit Breaker) equipment (breaker). Each substation / power station performs maintenance using such a single diagram.
Here, a line branching from the bus line as indicated by reference numeral 110 is called a branch. The transformer facility 102, the LS facility 104, the CB facility 105, and the like are collectively referred to as devices. In addition, the branch 110, the bus 101, and the devices are collectively referred to as equipment.

"flowchart"
FIG. 3 is a flowchart showing a procedure of processing for generating a training single figure according to the present embodiment.
When the user activates the basic system data generation unit 11 via the input unit 30, the basic system data generation unit 11 generates a basic system data generation screen (not shown) based on the facility data in the facility data storage unit 21. Is displayed on the display unit 40. While viewing the basic system data generation screen, the user extracts information necessary for analysis calculation to be performed later from the equipment data via the input unit 30. The basic system data generation unit 11 uses the information extracted from the facility data as basic system data, and generates basic system data to be stored in the basic system data storage unit 22 (S101). The facility data stores in advance all information related to the power system (bus position, connection information, device resistance, reactance, etc.).

Further, the user activates the pseudo-offline maintenance unit 12, and the pseudo-offline maintenance unit 12 displays on the display unit 40 a single diagram screen and a change information display screen to be described later based on the equipment data in the equipment data storage unit 21. To do. Then, the user performs pseudo offline maintenance (pseudo offline maintenance) via the input unit 30 while viewing the displayed single diagram screen and change information display screen (S102). Here, the pseudo off-line maintenance is to perform off-line maintenance in the same procedure as the on-line maintenance in a general training system.
The pseudo off-line maintenance will be described later. In addition, either the process of step S102 or the process of step S101 may be performed first.
The pseudo offline maintenance unit 12 stores information related to the pseudo offline maintenance in the pseudo offline maintenance data storage unit 23 as pseudo offline maintenance data.

  Then, the change data generation unit 13 combines the extracted pseudo-offline maintenance data and the basic system data, and sets it as change data that is temporary data for performing a subsequent basic system change. Then, the change data generation unit 13 stores the change data in the change data storage unit 24 (S103).

Next, based on the change data, the basic system changing unit 14 changes the basic system, that is, the training configuration, such as contraction of the equipment or replacement with dummy equipment (change of the basic system). ) Is performed (S104). The change of the basic system will be described later.
The basic system change unit 14 stores the result of the basic system change in the changed basic system data storage unit 25 as changed basic system data. At this time, the basic system change unit 14 may reflect the on / off information of the switch in the switchgear data of the switchgear data storage unit 26 in the changed basic grid data. By reflecting such switchgear data, it is possible to omit the calculation of the equipment whose switch is turned off in the subsequent analysis calculation, so that the processing speed of the analysis calculation can be improved.

  When the user inputs training data via the input unit 30, the analysis calculation unit 15 uses the changed basic grid data and the input training data to perform training analysis such as power flow calculation. Calculation is performed (S105).

《Pseudo offline maintenance》
Next, the pseudo off-line maintenance process in step S102 of FIG. 3 will be described with reference to FIG.
FIG. 4 is a diagram for explaining the pseudo offline maintenance according to the present embodiment.
FIG. 4A shows an example of a single diagram display screen, and FIG. 4B shows an example of a change information display screen.
First, the user selects equipment to be contracted on the single diagram display screen 210 of FIG. The single diagram displayed on the single diagram display screen 210 is displayed based on the facility data, but may be displayed based on the basic system data. Here, the equipment to be selected is a bus or a branch. In FIG. 4A, the branch 211 is selected as the connection source equipment, and the branch 212 is selected as the connection destination equipment. The selection is performed by clicking the mouse. Here, the connection source facility and the connection destination facility are distinguished from each other, but may not be distinguished from each other.

  When an equipment is selected via the input unit 30 on the single diagram display screen 210, the name of the selected equipment is displayed on the change information display screen 220 shown in FIG. 4B. Specifically, the name of the selected bus or facility such as a branch is displayed in the facility name on the change information display screen. In the example of FIG. 4B, “B12” and “B23” correspond to the names of the selected facilities. Here, “B12” in the upper row is the connection source facility name, and “B23” in the lower row is the connection destination facility name. However, such a distinction may not be performed.

  Then, the user inputs the line constant (resistance value, reactance, capacitance to ground, etc.) after changing the selected equipment via the input unit 30. The input line constant is displayed in the line constant display column of the change information display screen. In the example of FIG. 4B, “0.10” is input as the reduced resistance value (R), “0.20” is input as the reactance (X), and the ground capacitance (Y) is input. “0.30” is input.

  And a user inputs the calculation flag which is a flag which shows whether the changed installation is made into the object of subsequent analysis calculation via the input part 30. FIG. In the example of FIG. 4B, when the valid button 221 is selected, the calculation flag is “valid”, indicating that the target branch is the target of tidal current calculation. Note that the calculation flag can be omitted. However, when the calculation flag is input, the branch in which the calculation flag is invalid can be excluded from the analysis calculation. As a result, the analysis calculation can be speeded up. it can.

  At this time, when the pseudo-offline maintenance unit 23 searches the equipment data based on the equipment name and obtains the equipment unique number corresponding to the equipment name, the equipment name (connection source, Connection destination), equipment unique number (connection source, connection destination), track constant, and calculation flag valid / invalid information are stored in the pseudo offline maintenance data storage unit 23 as pseudo offline maintenance data (equipment information and attribute information). To do.

  This uses a technique used for online maintenance in a general training system.

《Basic system change》
Next, the basic system change in step S104 of FIG. 3 will be described with reference to FIGS.
FIG. 5 is a diagram illustrating an example of basic system change. Here, FIG. 5 shows an example in which a branch is selected as equipment.
FIG. 5A is a diagram illustrating an example of serial branch synthesis (serial facility synthesis).
Here, the branch B12 and the branch B23 are contracted to one branch B13, and the device Z12 and the device Z23 are contracted to one device Z13. Here, the correspondence with FIG. 4 will be described. Each of the branch B12 and the branch B23 is the connection source equipment and the connection destination equipment in FIG. It corresponds to a constant (“R”, “X”, “Y”).

That is, the basic system change unit 14 changes the basic system in the following procedure shown in FIG.
First, when the basic system changing unit 14 refers to the pseudo offline maintenance data and acquires the equipment unique numbers of the connection source equipment and the connection destination equipment, the equipment (here, a branch) corresponding to the basic system data based on the equipment unique number. Is identified (S201).
Next, the basic system change unit 14 reduces the facilities corresponding to the connection source facility and the connection destination facility in the basic system data to one (S202).
Then, the basic system changing unit 14 sets the line constant of the pseudo offline maintenance data as the line constant of the equipment in the reduced facility (S203).

  The series branch combination as shown in FIG. 5A is applied to a two-winding transformer or the like. For example, the primary and secondary branches of a two-winding transformer can be reduced to one branch (equipment) by connecting them in series.

FIG. 5B is a diagram illustrating an example of parallel branch synthesis (parallel facility synthesis).
Here, branch B12 and branch B23 are reduced to one bus B13, and device Z12 and device Z23 are reduced to one device Z13. Here, the correspondence with FIG. 4 will be described. The bus B12 and the bus B23 are the connection source equipment and the connection destination equipment in FIG. 4A, and the line constant of the device Z13 is the line constant ( "R", "X", "Y").

The parallel branch synthesis as shown in FIG. 5B is applied to two parallel branches connected to the same bus without a switching device such as a circuit breaker. For example, two always-parallel branches that have no switchgear and are connected to the same bus are always parallel and are reduced to one branch.
Note that the procedure of parallel branch synthesis shown in FIG. 5B is the same as the procedure of steps S201 to S203 in FIG.

FIG. 5C is a diagram showing an example of dummy branch replacement (dummy equipment replacement).
Here, the branch B12 and the branch B23 are replaced with one dummy branch Br, and the device Z12 and the device Z23 are replaced with one dummy device Zr. The branch B34 and the device Z34 are not changed. The difference from the serial branch composition of FIG. 5A is that the serial branch composition contracts two branches, whereas in FIG. 5C, a completely different dummy branch is substituted. . Here, the correspondence with FIG. 4 will be described. The bus B12 and the bus B23 are the connection source facility and the connection destination facility in FIG. 4A, and the line constant of the facility Zr is the line constant ( "R", "X", "Y").

For example, in the serial branch combination shown in FIG. 5A, the line constant after the change is a combined value of the line constant in each facility before the change, whereas in the dummy branch conversion of FIG. The line constant after the change is set to a value unrelated to the line constant in each facility before the change.
In this embodiment, the serial branch is replaced with a dummy branch, but the parallel branch may be replaced with a dummy branch.

  The procedure for adding a dummy branch shown in FIG. 5C is the same as the procedure in steps S201 to S203 in FIG. 6 except that “contract” in step S202 or step S203 becomes “replacement”. Detailed description of the procedure is omitted.

<Summary>
By performing such a basic system change, it is possible to generate training data that has been subjected to pseudo-offline maintenance that greatly changes the configuration of the equipment using an online maintenance method in a general training system. . That is, the burden on the user when performing offline maintenance on the power system for training can be reduced.

  Here, three branches, serial branch composition (serial equipment composition), parallel branch composition (parallel equipment composition), and dummy branch replacement (dummy equipment replacement) are described, but the basic system change is not limited to this.

  In the present embodiment, a technique for grouping facilities, which was not specified in the technique described in Patent Document 1, is clarified. In addition, according to the present embodiment, a simple diagram (basic system) can be changed by a simple method without performing complicated processing as described in Omission of DC unnecessary equipment in Patent Document 1. Is possible.

1 System data generator for training (power system model change device)
DESCRIPTION OF SYMBOLS 10 Processing part 11 Basic system data generation part 12 Pseudo off-line maintenance part 13 Change data generation part 14 Basic system change part (electric power system change part)
15 Analysis calculation unit 21 Equipment data storage unit 22 Basic system data storage unit (including power system model information)
23 Pseudo offline maintenance data storage (including equipment information and attribute information)
24 change data storage unit 25 change basic system data storage unit 26 switching device data storage unit 30 input unit 40 display unit

Claims (5)

A power system model changing method by a power system model changing device that changes the configuration of a power system model, which is a model of a power system having a plurality of facilities including busbars and branches,
The power system model changing device is:
Via the input unit, information of a plurality of facilities to be changed in the power system model and attribute information of the facilities after the change are input,
The power system model changing method, wherein the plurality of facilities to be changed are changed by replacing the plurality of facilities to be changed with one facility having the attribute information. Changing a plurality of facilities to be changed is
Series equipment synthesis that synthesizes multiple equipment connected in series into one equipment,
Parallel facility synthesis that combines multiple branches connected in parallel into one facility,
And dummy equipment replacement to replace multiple branches with one dummy equipment,
It is any one of these. The electric power system model change method of Claim 1 characterized by the above-mentioned. The power system model changing device is:
The power system model changing method according to claim 1 or 2, wherein power calculation analysis is performed based on the changed power system model. The power system model changing device is:
The electric power system model according to claim 3, wherein a calculation flag, which is a flag indicating whether or not the equipment to be changed is a target of analysis calculation, is added to the information on the changed equipment. Modification method. A power system model changing device for changing the configuration of a power system model, which is a model of a power system having a plurality of facilities including busbars and branches,
Via the input unit, information of a plurality of facilities to be changed in the power system model and attribute information of the facilities after the change are input,
A power system model changing device comprising: a power system changing unit that changes the plurality of facilities to be changed by replacing the plurality of facilities to be changed with one facility having the attribute information. .

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