JPH1051955A - Design system for power receiving and transforming system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make equipment be immediately indicatable when the specification for the equipment is changed, by inputting items and text of the service condi tion to be changed of the equipment, extracting the equipment class holding the changed service condition, and then, extracting constituent equipment which meets the corrected service condition of the extracted constituent equipment. SOLUTION: An equipment candidate extracting means 112 extracts constituent equipment candidates which meet a service condition from an equipment data base 114. When arbitrary constituent equipment is selected from the extracted constituent equipment candidates, a service condition storing means 111 stores an identifier and service condition of the selected constituent equipment in a system model holding means 113 by correlating the identifier with the service condition. When the stored service condition is changed, on the other hand, the equipment candidate extracting means 112 extracts the equipment class holding the item of the changed service condition based on the item and the text of the service condition to be changed and an equipment candidate that meets the corrected service condition of the extracted constituent equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a design system for a power receiving and transforming system, and more particularly, to a method for quickly changing a design specification when it is necessary to change use conditions assumed in an equipment selection stage in a later design process. The present invention relates to a substation design system suitable for correction.

[0002]

2. Description of the Related Art In the design of a substation system such as a plant, a single-line connection diagram is created at an initial stage to select power distribution equipment (hereinafter simply referred to as "equipment"). The single-line diagram is created based on the specifications of the building where the equipment is to be installed and the machine to which power is to be supplied.However, at the stage when the creation of the single-line diagram is started, the detailed specifications of the building and the machine are determined. Often not. For this reason, the designer of the substation system has to start designing using unspecified or assumed specifications of buildings and machines.

[0003] As an apparatus for supporting the design of a substation system, there is Japanese Patent Application Laid-Open No. 5-189509. This is to register a figure pattern for creating a drawing, combine these patterns, and perform a systematic check to reduce the burden on the designer and increase the efficiency of the design process.

[0004]

As the design of the building where the equipment is to be installed and the machine to which the power is to be supplied progress in parallel with the design of the substation system, as the detailed specifications are determined, the receiving There may be inconsistencies with the use conditions assumed by the substation system designer. In such a case, the designer of the substation system needs to review the equipment already selected. These operations are factors that increase the design man-hours, and put a considerable burden on designers. Also, the above prior art is not considered for changes in specifications of buildings and machines, and efficiency in design changes cannot be realized.

An object of the present invention is to realize efficient and short-time reselection of components when a specification change of a building as a place where equipment is installed or a machine to which power is supplied occurs. is there. In other words, when a specification change of a building or a machine occurs after the selection of equipment of the substation system, a design system that can promptly indicate equipment that needs reselection and that can promptly present alternative equipment is provided. Aim.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a design system for selecting constituent equipment of a substation system, the constituent equipment candidate being extracted based on use conditions necessary for the constituent equipment. Select any component device from
The selected component device candidate and the use condition are stored in association with each other, and when the use condition needs to be modified, the corresponding component device is designated from the stored component device candidate based on the modified use condition. At the same time, a configuration device candidate that satisfies the modified use condition is presented.

In other words, in the design system of the substation system, the identifiers of the selected components and the usage conditions are stored, and when the usage conditions including the installation location and the installation method of the configuration devices are changed, the usage conditions to be changed are changed. Enter the item and the changed usage condition, extract the device class that holds the usage condition item to be changed, and extract the component device candidate that satisfies the modified usage condition for the extracted component device Is what you do.

[0008] The use condition is an attribute that affects the characteristics and performance of the component equipment, and represents an environment in which the component equipment of the power receiving and transforming system is used.

More specifically, the present invention relates to a design system for selecting a component of a power receiving and transforming system from candidate components prepared in advance and designing the power receiving and transforming system. A first database that stores usage conditions and electrical allowable values of the power supply, a second database that stores voltage values required for the components based on the specifications of the power receiving and transforming system, and components to be selected. Means for extracting necessary voltage values from the second database when necessary use conditions and current values are input, and component devices satisfying the use conditions, current values and voltage values of the component devices to be selected Means for extracting a candidate from the first database, means for selecting a desired constituent device from the extracted constituent device candidates, use conditions and electric power of the selected constituent device And Do tolerance, in which and a third database for storing in association with conditions of use and the current value required to configure devices that are the input.

In this case, the second database includes a circuit model that divides the power receiving and transforming system into predetermined functional units and defines a required voltage value for each, and an equipment model that defines constituent elements of the circuit model. In the case where necessary use conditions and a current value relating to a component device to be selected are input, a component corresponding to the component device is extracted from the device model, and a component necessary for the component is extracted from the circuit model. It is preferable to configure so as to extract the voltage value.

Note that the first to third databases need not necessarily exist independently.

[0012] By managing the characteristic data and the like of the selected component devices in association with the use conditions, it is possible to specify the component device whose design should be changed with respect to the use conditions and the like in response to a change in the specifications of the building or the machine. Since the constituent device candidates satisfying the later use conditions are displayed, the burden on the designer is reduced, and the design change can be efficiently realized. At this time, if the current values and the like required for the constituent devices are displayed in association with each other, the reselection of the constituent devices becomes easy.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 shows a design system of the present invention for selecting components of a substation system.

The design system shown in FIG. 1 includes an equipment database 114 that holds the relationship between the characteristics of various constituent equipment candidates and use conditions such as their installation locations and installation methods. Candidate extracting means 112 for extracting the information, the use condition storing means 111 for storing the identifiers of the selected constituent devices and their use conditions in a system model holding means 113 which will be described later, and the selected from the use condition storage means 111. And a system model holding means 113 for holding the use conditions of the components.

First, when the designer inputs a use condition, the device candidate extracting means 112 extracts constituent device candidates satisfying the use condition from the device database 114. Specifically, a component device candidate is extracted using current values, voltage values, and use conditions necessary for the component devices as parameters.

Next, when the designer selects an arbitrary component device from the component device candidates, the use condition storage unit 111 associates the identifier of the selected component device with the input use condition and stores it in the system model holding unit 113. Store.

On the other hand, when the designer changes the stored use conditions, the device candidate extracting means 112 can extract the constituent device candidates again for the component devices that need to be changed, using the use conditions before and after the change as a parameter. it can. That is, the user enters the item of the usage condition to be changed and the usage condition after the change, extracts the device class holding the item of the usage condition to be changed, and satisfies the corrected usage condition for the extracted component device. Extract constituent device candidates.

As described above, if the use conditions assumed by the designer when the constituent devices are selected are stored, a search based on the use conditions can be performed, and when the specifications of the building or the machine are changed, the reselection can be performed. Necessary components can be specified accurately and quickly.

FIG. 2 shows an example in which the design system shown in FIG. 1 is more specifically applied. However, in FIG. 2, the system model holding means and the use condition storage means are connected via the system model editing means. In addition, a design model definition unit, a use condition database, and a user interface unit are added.

The design model definition means 201 defines a device model and a circuit model, which are expression units of the design specifications (system model) of the substation described above.

The present system handles the design specifications of the entire power receiving and transforming system as a system model, which is a composite of circuit models and equipment models. These will be briefly described.

The device model and the circuit model are structures holding attributes and methods, respectively. The device model represents a distribution device constituting the power receiving and transforming system, and the circuit model represents a circuit obtained by arbitrarily dividing the power receiving and transforming system. Here, the method is a procedure for storing a specific value in the attribute, and is started by a message to the device model or the circuit model. In addition, a plurality of classes are defined in the device model and the circuit model, respectively, according to the functions of the device and the circuit. A class is a group of device models or circuit models that have the same attributes and methods.

FIGS. 4 and 5 show examples of the device model and the circuit model.

FIG. 4 shows a data structure of a device model representing a cable. The device model holds at least device class and model attributes. The attribute of the device class indicates the type of device represented by the device model. The type attribute is
Holds a unique symbol to indicate a specific device. The device model represents detailed specifications of the device, and each class has a unique attribute. In FIG. 4, the value of the device class 401 is “cable”, which indicates that this device model represents a cable. The value of the model 402 is “6600VCV” and 66
This shows that the cable is a 00V cross-linked polyethylene insulated vinyl sheath cable. Attributes unique to the cable class device model include a size 403, a number of cores 404, and a name 40.
5, length 206, etc., and the value is determined by selecting the cable. Further, the device model holds a method. Methods held by the device model include those that store a value in a specified attribute and those that report the stored attribute value.

FIG. 5 shows a data structure of a circuit model representing a substation circuit. The circuit model holds at least attributes of a circuit class, connection information, a circuit pattern, and device configuration information.

In FIG. 5, a circuit class 501 is an attribute for holding an identifier of a group in which circuits are classified by function. The connection information 502 is an attribute representing an electrical connection between circuit models, and stores an identifier of a connection destination circuit model. The circuit pattern identifier 503 is an attribute for specifying the circuit structure represented by the circuit model, and stores an identifier of the circuit pattern.

Here, the circuit pattern is a circuit diagram in which symbols of components such as a transformer, a circuit breaker, and a cable are connected by a line representing a wire or a bus. This symbol represents a component of the circuit pattern, and only specifies the basic function of the device but does not specify a specific device type. For example, reference numerals 601 and 603 shown in FIG. 6 are symbols representing circuit breakers, and reference numerals 602 and 604 are symbols representing transformers and cables, respectively. In the embodiment of the present invention, a plurality of circuit patterns are registered, and an identifier is assigned to each of them.

The device configuration information 504 is a list of identifiers of device models corresponding to devices constituting the circuit. Also,
The circuit model holds attributes indicating the electrical state of the circuit, such as the number of phases 505, the voltage 506, and the capacity 507.

As in the case of the device model, the methods held by the circuit model include a method for storing a value in a specified attribute and a method for reporting the stored attribute value.

In the present system, the selection of a component device is realized by using such a circuit model and a device model.
In other words, for the symbol 604 of the circuit pattern from which a component is to be selected, the type of the component to be selected and the necessary electrical characteristics are extracted from the circuit model and the device model, and the necessary use conditions and the like are input. The corresponding constituent device candidates are displayed as a list.

However, it is not always necessary to provide a circuit model and a device model, and there is no problem if the characteristic data of the component devices selected by the designer and the necessary use conditions can be managed.

The system model holding means 202 is an area for holding a system model. For example, when constructing a system model, a device model or circuit model of an arbitrary class is created in the system model holding unit 202 using the data structure defined in the design model definition unit 201 as a template, and the relationship between these models is created. Will be defined. The relation between the models is prepared as a connection relation indicating an electric connection and an aggregate relation indicating a relation between a complex and its element.

The system model editing means 203 exchanges messages with the device model or circuit model stored in the system model holding means 202. Messages can be broadly classified into a request message that activates a method defined in the destination model and a response message that is a response that the model that has received the request message returns to the source of the request message. Some request messages do not return a response message. Storing and referencing attribute values for the model is also realized by message exchange.

The use condition storage means 204 sends the use conditions input by the designer via the user interface 208 to the device candidate extraction means 206, and requests the extraction of constituent device candidates. The use condition storage unit 204 stores the identifier of the component device and the use condition in the system model holding unit 202 in association with each other when the designer selects the component device.
FIG. 7 shows an example of the storage form. The use conditions of the constituent devices are managed by a record including a device model identifier 702 and a use condition 703. This record is held as a list for each device class. For example, FIG. 7 shows that the use conditions of the device model having the identifier “CV010” are a voltage “6,000 V”, an allowable current “200 A”, a laying method “underdrain”, and the number of lines “3”. "CV011", "CV01"
2 "and" CV013 ". FIG.
Is a use condition input screen for selecting a cable class device. In the present invention, the circuit specification is expressed by associating the circuit model with the device model, and among the values input on the use condition input screen, the data of the device itself is stored as attribute values of the device model, and other values are stored. Store data as usage conditions. In the example of FIG. 10, the values of “name” and “length” are stored as attribute values of the device model (FIG. 4),
The values of “allowable current”, “laying method”, and “number of lines” are stored as use conditions (FIG. 7).

In order to refer to the use conditions of the constituent devices from the circuit model, a device model identifier is used. That is, the data indicated by the device model identifier stored in the device configuration information 504 may be referred to.

The device database 205 holds characteristic data of constituent device candidates in association with use conditions. FIG. 3 shows an example of a data structure held by the device database 205.

FIG. 3 shows a device class 301 of a target constituent device candidate, an electrical characteristic 302, and a use condition 30.
3, 304 and characteristic data 305 are described.
In this data structure, “Cable” is described as an identifier of the device class in the device class 301, and the electrical characteristic 30
2, "6600 V" is described as a circuit voltage, "Aerial laying" is described as a laying method 303 in a use condition, "1" is described as a number 304, and characteristic data 305 is The allowable current 315, the unit resistance 316, and the unit reactance 317 are described for each combination of the type, the number of cores 312, and the size 313. That is, it is configured such that the corresponding component device can be extracted from the information described in the circuit model and the device model and the necessary use conditions.

The device candidate extracting unit 206 stores the use condition obtained from the use condition storage unit 204 and the system model holding unit 20.
The device database 205 is searched based on the circuit model and the required function acquired from the device model and the device model held in the device 2 to extract usable constituent device candidates, and a list of the extracted device candidates is displayed on the user interface. Part 2
08 on the screen.

The use condition database 207 holds use conditions that can be set for each type of component device. This can prevent the designer from making useless input by presenting options when setting usage conditions. FIG. 18 shows the structure of the use condition database. In FIG. 18, there are two cable use condition items of the laying method and the number of strips, and values that can be selected as the laying method include, for example, “air laying”, “underdrain laying”, “direct laying laying”. , "Pipe Inlet".
Note that the use condition database is not necessarily required.

Next, the operation of the design system shown in FIG.
This will be described with reference to FIG.

FIG. 8 is a flowchart showing an operation procedure of a designer when creating a single-line connection diagram.

First, a designer as a user creates a circuit model expressing the load of the power receiving destination of the power receiving and transforming system (step 801). That is, the designer issues a circuit model generation command via the user interface 208,
A copy of the load circuit model defined in the design model definition means 201 is created in the system model holding means 202. At this time, a device model corresponding to the component device of the load circuit model is also generated, and the identifier is stored as an attribute value of the circuit configuration information of the load circuit model. The components of the load circuit model are, for example, a load such as an induction motor and its peripheral devices. The created load circuit model is displayed as a symbol on the screen.

Subsequently, the designer issues a load information input command to display a screen for inputting the rated value of the load, the number of the load, and the like, and inputs the load information.

Next, the designer operates the design model definition means 201.
A required circuit is selected and duplicated from the circuit models registered in, and the generated circuit models are arbitrarily connected, and a circuit pattern of each circuit model is selected to create a skeleton of a system model (step 802). That is, when the designer selects a circuit model and issues a new circuit model creation command, the system model editing unit 203 sends a “create new model” message to the circuit model defined in the design model definition unit 201. The circuit model receiving the message copies its own copy to the system model holding means 2
02 is created. The circuit model created in the system model holding means 202 is displayed as a symbol on the screen.
While creating the necessary circuit model copies, the designer creates the configuration of the substation system by defining the connection relations to them. To define the connection relationship between circuit models, the designer selects the symbol of the circuit model displayed on the screen,
This is performed by issuing a connection command while indicating the connection destination. When the connection command is issued, the system model editing unit 203 outputs the connection information 5 of the specified circuit model.
02 stores the circuit model identifier of the connection destination.

FIG. 9 shows an example of a screen for defining a connection relationship between circuit models. Reference numerals 901, 902, 90
Symbols 904, 905 are symbols of a power receiving circuit model, a self-generated circuit model, a bus circuit model, a substation circuit model, and a load circuit model, respectively. Line segments between the symbols represent connection relationships between circuit models. After the connection relation between the circuit models is defined, a circuit pattern is assigned to the circuit model. When a symbol of a circuit model displayed on the screen is selected and a circuit pattern selection command is issued, a list of selectable circuit patterns is displayed. When a circuit pattern is selected from the displayed list with a mouse or the like, the system model editing unit 203 stores the selected circuit pattern identifier in the circuit pattern identifier 503 of the designated circuit model. At this time, a device model corresponding to the component device of the circuit model is also generated at the same time, and the identifier is stored as an attribute value of the circuit configuration information of the circuit model. When the selection of the circuit pattern is completed for all the circuit models, the main circuit skeleton of the power receiving and transforming system is completed.

Next, specific devices are assigned to the components in the circuit pattern selected in each circuit model (step 8).
03, step 804). In other words, the designer inputs the use conditions while specifying the constituent devices (symbols) in the circuit pattern (step 803), and selects the constituent device to be adopted from the list of available constituent device candidates displayed by the system (step 803). 804).

Hereinafter, a method of selecting the components will be described in detail by taking a cable selection process as an example. Specifically, when the circuit pattern of FIG. 6 is assigned to the substation circuit model corresponding to the symbol 904 of FIG. 9, the cable 604 is selected.

When the designer selects the substation circuit model symbol 904 on the screen and issues a circuit pattern display command, a circuit pattern as shown in FIG. 6 is displayed on the screen.

Next, the designer specifies the cable symbol 604.
Is selected and a candidate extraction command is issued, the use condition storage unit 204 notifies the device candidate extraction unit 206 of the device class and displays a use condition input screen as shown in FIG. That is, component device information is extracted from the circuit model having the symbol 604, and the device class described in the corresponding device model is notified. FIG. 10 is a use condition input screen for selecting a cable class device. Name 100
1 is a name that can be arbitrarily given to a cable by a designer. The allowable current 1002 is the maximum current that can flow through the cable. The length 1003 is the length of the cable, the laying method 1004 is the installation method of the cable, and the number 1005 is the number of cables passing through the same route. The allowable current 1002, the laying method 1004, and the number of wires 1005 are data necessary for selecting a cable.

Now, the allowable current 2 is applied to the cable 604 in FIG.
Assume that a cable of 00A or more is required. Further, it is known that the length of the cable is 1,000 m and the number of the wires is three, but it is assumed that the cable laying method has not been determined. In this case, the designer cannot select a cable without assuming any laying method. Here, the installation method is assumed to be “underdrain installation”, and the allowable current 1002 is “200”.
Enter Short circuit current 1006 and total voltage drop rate 100
7 is data calculated after a cable is selected. When reselecting a cable, the allowable current and the cable size can be determined with reference to these data. In response to the input completion event on the screen of FIG. 10, the process of extracting usable cables is started.

The flowchart shown in FIG. 11 and FIG.
The extraction process will be described using the event chart shown in FIG.

First, when an input completion event is issued from the user interface unit 208, the use condition storage unit 204 stores the identifier (symbol 604) of the circuit model having the selected device as a component, and the device corresponding to the selected device. The model identifier (cable) and the input usage conditions are stored in the temporary area (step 110).
1).

Subsequently, the use condition storage means 204 sends a “device candidate extraction request” using the device class name and the use condition of the component device determined from the circuit model identifier and the device model identifier as parameters to the device candidate extraction means 206. Send to

Next, the device candidate extracting means 206 transmits a “circuit state report request” using the circuit model identifier as a parameter to the system model editing means 203, and based on the circuit model identifier, the voltage required for the constituent device. A value (cable voltage) is obtained (step 1102). That is, the system model editing unit 203 extracts a corresponding circuit model based on the transmitted circuit model identifier, and further extracts a voltage value described in the corresponding circuit model.

Next, the device candidate extracting means 206 searches the device database 205 based on the obtained cable voltage and the use conditions to extract usable cables, and sends a response indicating completion of the extraction to the use condition storage means 204. return. That is,
The device candidate extracting means 206 acquires the device class name from the device model identifier (step 1103), and searches for cable data corresponding to the device class name (step 110).
4). At this time, characteristic data that satisfies the laying method, the number of use conditions, the circuit voltage, and the like are determined from the component equipment candidates for the cable (step 1105).
A cable that satisfies the condition that “the input allowable current can flow and the cable size is the smallest” is searched (step 1106), and a device candidate list is created, and the type, number of cores, And size to the list. Then, the processing of steps 1106 and 1107 is executed for all cables determined by the combination of the type and the number of cores (step 1108). When this is completed, a response indicating completion of extraction of usable cables is transmitted to the use condition storage unit 204.

Next, the use condition storage means 204, which has received the response of the completion of the extraction of the usable cable, transmits a "request for display of a device candidate list", and
6 displays a list of available cables on the screen.

FIG. 13 is an example of a screen displaying a list of usable cables. The type, number of cores, and size of the cable are displayed.

Next, FIG. 14 shows an event chart when determining a device to be used from a list of usable cables.

When the designer issues a characteristic display command while selecting a cable from the available cable list in FIG. 12, the use condition storage means 204 uses the cable type, the number of cores, and the size as parameters to obtain " Characteristic data display request "to the device candidate extracting means 206.

Upon receiving the request, the device candidate extracting means 206
The characteristic data of the specified cable is acquired from the device database 205 and is displayed on the screen.

FIG. 15 is a screen displaying the characteristics of the cable. As described above, the designer selects an arbitrary cable from the list of usable devices and displays the characteristics, thereby improving the usability of the designer.

Next, when the designer selects a cable from the list of available devices and issues a storage command, the usage condition storage means 204 causes the “selection result storage request” using the cable type, the number of cores and the size as parameters. Is transmitted to the system model editing means 203. System model editing means 203
Stores the data passed as a parameter as an attribute value of the device model.

Next, a case where a situation different from the situation originally assumed by the designer occurs and cable equipment is reselected will be described with reference to FIGS. Specifically, FIG.
In the use condition input screen, the allowable current “200A”, length “1,000m”, laying method “underdrain laying”,
The cable selected as "Strip" is of type "6,600V
CV ", Number of cores" Triplex ", Size" 60mm
The case where the installation method is changed from "2" to "direct burying" will be described.

FIG. 16 is a flowchart of a process for reselecting a device using this embodiment. In the figure, the processes indicated by the boxes with rounded corners are operations performed by the designer, and the other processes are executed by the design system according to the present invention. FIG. 17 is an event chart of the device reselection process in this embodiment.

First, the designer displays a list of use conditions and selects the item “laying method” of the use condition to be changed (step 1601). Next, the changed use condition “direct burying” is input (step 1602), and the component device reselection process is started.

When the processing is started, the use condition storage means 2
04 transmits to the system model editing means 203 a "request for extraction of a device to be changed" using the changed usage condition item name "laying method" and the changed usage condition "direct laying" as parameters.

The system model editing means 203 extracts from the file as shown in FIG. 7 a device class including the use condition item “laying method” passed as a parameter in the use condition (step 1603). For example, the device class “cable” is extracted because the installation method item is held as a use condition (see FIG. 7).

Next, the system model editing means 203 extracts the equipment class “cable” shown in FIG. 7 and changes the usage condition “directly laid” passed as a parameter.
The device selected under the use condition different from that described above is extracted (step 1604). For example, the equipment model identifier “CV010” in FIG. 7 is extracted because it is selected by the installation method “underdrain installation”. As a result of extracting the device to be changed, the device model identifier “CV
010 ”is returned.

The use condition storage unit 204 corrects the use condition of the device to be changed based on the received device model identifier “CV010” (step 1605), and extracts a device candidate based on the corrected use condition (step 1605). 1606). The device candidate extraction process is the same as in FIG. 11 and FIG. The extracted list of device candidates is displayed on the screen (step 1607).

In this embodiment, after specifying the use condition item to be changed, the component devices having the corresponding use condition are extracted. However, there is no problem if only the use condition to be changed is searched as a parameter.

When the specifications of a building or a machine are changed in this way, devices that need to be corrected can be automatically extracted based on the use conditions stored in association with the design specifications of the power receiving and transforming system. The burden on the user can be reduced, and the reselection of component devices can be made more efficient.

Further, if the reselection of the power distribution equipment can be performed quickly and easily, the design of the substation system can be started early without waiting for the specification of the building or the machine to be determined. Can be shortened.

[0074]

As described above, according to the present invention, when a change in the specifications of a building or a machine occurs after the selection of the equipment of the power receiving and transforming system, the equipment that needs to be re-selected can be immediately instructed. In addition, the design process can be shortened because alternative devices can be presented quickly.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of the present invention.

FIG. 2 is a diagram showing a configuration of one embodiment of the present invention.

FIG. 3 is a diagram showing a data structure of a device database in one embodiment of the present invention.

FIG. 4 is a diagram showing a structure of a device model in one embodiment of the present invention.

FIG. 5 is a diagram showing a structure of a circuit model in one embodiment of the present invention.

FIG. 6 is a diagram showing an example of a circuit pattern according to one embodiment of the present invention.

FIG. 7 is a diagram showing a storage form of usage conditions according to an embodiment of the present invention.

FIG. 8 is a flowchart showing an operation procedure of a designer when creating a single-line connection diagram using one embodiment of the present invention.

FIG. 9 is a diagram showing a screen for defining a connection relationship between circuit models in one embodiment of the present invention.

FIG. 10 is a diagram showing a cable use condition input screen according to one embodiment of the present invention.

FIG. 11 is a flowchart of a process of extracting a correction target device and a process of extracting a substitute device candidate according to an embodiment of the present invention.

FIG. 12 is an event chart of an available device extraction process according to an embodiment of the present invention.

FIG. 13 is a diagram showing a screen displaying a list of usable cables in one embodiment of the present invention.

FIG. 14 is an event chart of a process of determining a device to be used in an embodiment of the present invention.

FIG. 15 is a diagram showing a screen displaying cable characteristic data in one embodiment of the present invention.

FIG. 16 is a flowchart for reselecting a device using one embodiment of the present invention.

FIG. 17 is an event chart of a device reselection process according to an embodiment of the present invention.

FIG. 18 is a diagram showing a data structure of a use condition database in one embodiment of the present invention.

[Explanation of symbols]

 111 Usage Condition Storage Unit 112 Device Candidate Extraction Unit 113 System Model Holding Unit 114 Device Database 121 Area for Holding Identifier of Selected Device 122 Storage Area for Use Condition 123 Storage Area for Use Condition 124 Storage Area for Use Condition 201 Design Model Definition means 202 System model holding means 203 System model editing means 204 Usage condition storage means 205 Device database 206 Device candidate extraction means 207 Usage condition database 208 User interface unit 301 Device class identifier holding area 302 Voltage holding area 303 Installation method Retention area 304 Retention area for the number of cables 305 Retention area for cable characteristic data 311 Retention area for cable type 312 Retention area for the number of cable cores 313 Retention area for cable size 315 Storage area for allowable current data of cables 316 Storage area for unit resistance data of cables 317 Storage area for unit reactance data of cables 401 Storage area for equipment class identifiers 402 Storage area for model data 501 Storage area for circuit class identifiers 502 Connection information Holding area 503 Holding area of circuit pattern identifier 504 Holding area of device configuration information 505 Holding area of phase number data 506 Holding area of voltage data 507 Holding area of capacity data 701 Holding area of device model class name 702 Holding area of device model identifier 703 Area for holding usage conditions

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shin Kameyama 5-2-1, Omika-cho, Hitachi City, Ibaraki Prefecture Inside the Hitachi, Ltd. Omika Plant

Claims (4)

[Claims] 1. A design system for selecting a component device of a power receiving and transforming system from candidate component devices prepared in advance and designing the power receiving and transforming system, comprising: a use condition of each of the plurality of component device candidates; A first database for storing values, a second database for storing voltage values required for the component devices based on the specifications of the substation system, and necessary use conditions and current values for the component devices to be selected. Means for extracting the necessary voltage value from the second database when input, and a component device candidate which satisfies the use condition, current value and voltage value for the component device to be selected from the first database. Means for extracting, means for selecting a desired component device from the extracted component device candidates, use conditions and electrical permissible values of the selected component device, and Design system characterized by comprising a third database for storing in association with conditions of use and the current value required equipment. 2. The second database includes a circuit model that divides the power receiving and transforming system into predetermined functional units and defines necessary voltage values for each, and an equipment model that defines constituent elements of the circuit model. When necessary use conditions and a current value relating to a component device to be selected are input, a component corresponding to the component device is extracted from the device model, and a voltage required for the component component is extracted from the circuit model. 2. The design system according to claim 1, wherein a value is extracted. 3. In the design system of the power receiving and transforming system, the identifier of the selected component device and the use condition are stored, and when the use condition including the installation location and the installation method of the component device is changed, the use condition to be changed is changed. Enter the item and the changed usage condition, extract the device class that holds the usage condition item to be changed, and extract the component device candidate that satisfies the modified usage condition for the extracted component device A design system characterized by: 4. A design system for selecting component devices of a substation system, wherein an arbitrary component device is selected from component device candidates extracted based on use conditions necessary for the component devices, and the selected component device candidates are selected. When the usage conditions need to be corrected, the corresponding configuration device is indicated from the stored configuration device candidates based on the corrected usage conditions, and the corrected usage condition is specified. A design system for presenting constituent device candidates satisfying a condition.