JP7839082B2 - Information processing method and information processing apparatus - Google Patents

Description

This invention relates to an information processing method and an information processing apparatus.

Patent Document 1 discloses a method for inputting wiring path data, which involves specifying the drawing position on CAD, displaying a cross-section of the path passing through a specified point, specifying the wiring path while displaying multiple wiring path patterns, determining the wiring route, and accurately generating three-dimensional wiring path data.

Japanese Patent Publication No. 2003-157289

As disclosed in Patent Document 1, various techniques are known for streamlining the creation of electrical wiring routes.

In contrast, the selection of the size and number (number of wires) of electrical wiring to be routed along the wiring path has traditionally been done through manual calculations. Therefore, there is a need for a more efficient method for selecting electrical wiring.

The present invention aims to efficiently select electrical wiring.

The present invention relates to an information processing method performed by a computer for selecting electrical wiring to connect a distribution board and a switchboard, wherein the computer is input to a drawing information showing the route of the electrical wiring connecting the distribution board and the switchboard, power supply information including information on the transmission voltage and transmission load by the switchboard, and wiring information which associates a plurality of wiring specifications, which are combinations of the size and number of wires of the electrical wiring, the impedance in the wiring specifications, and the allowable current value in the wiring specifications, and the information processing method is the step of obtaining the route length of the electrical wiring from the drawing information showing the route of the electrical wiring, and the step of determining whether predetermined narrowing conditions are met for each wiring specification based on the route length, power supply information, and wiring information. The process includes the steps of determining and obtaining candidate wiring specifications that meet the narrowing criteria, and selecting one wiring specification from those that meet the narrowing criteria based on pre-set selection criteria. The narrowing criteria are: firstly, that the load current for each electrical wire is smaller than the current capacity of each circuit breaker, which is determined according to the power transmission load of the distribution board, in the number of circuit breakers provided in the distribution board corresponding to the number of electrical wires; secondly, that the allowable current value in the wiring specification is larger than the current capacity of the circuit breaker; and thirdly, that the voltage drop rate when electrical wiring is routed according to the wiring specification is less than or equal to a pre-set allowable value.

The present invention relates to an information processing device for selecting electrical wiring connecting a distribution board and a switchboard, comprising: a storage unit for storing information; and a processing unit for selecting electrical wiring based on the information stored in the storage unit. The storage unit stores drawing information showing the route of electrical wiring connecting the distribution board and the switchboard; power supply information including information on the transmission voltage and transmission load by the switchboard; and wiring information which associates a plurality of wiring specifications, which are combinations of the size and number of wires of the electrical wiring, the impedance in the wiring specifications, and the allowable current value in the wiring specifications. The processing unit obtains the route length of the electrical wiring from the drawing information showing the route of the electrical wiring, and selects the wiring specifications based on the route length, power supply information, and wiring information. The system determines whether the specified filtering conditions are met, obtains wiring specifications that meet the filtering conditions as candidates, and selects one wiring specification from those that meet the filtering conditions based on pre-set selection criteria. The filtering conditions are: firstly, that the load current for each electrical wire is smaller than the current capacity of each circuit breaker, which is determined according to the power transmission load of the distribution board, in the circuit breakers installed in the distribution board in a number corresponding to the number of electrical wires; secondly, that the allowable current value in the wiring specification is larger than the current capacity of the circuit breaker; and thirdly, that the voltage drop rate when electrical wiring is routed according to the wiring specification is less than or equal to a pre-set allowable value.

According to this invention, the selection of electrical wiring can be performed efficiently.

This is a block diagram showing the configuration of an information processing device according to an embodiment of the present invention. This figure shows an example of a design drawing of an embodiment of the present invention. This is a list diagram showing wiring information in an embodiment of the present invention. This is a flowchart illustrating an information processing method according to an embodiment of the present invention.

The information processing apparatus 100 and information processing method according to an embodiment of the present invention will be described below with reference to the drawings.

The information processing device 100 and information processing method of this embodiment perform the process of selecting the electrical wiring (main line) connecting the power distribution board 1 and the distribution board 2 in a factory, plant facility, building facility, etc. Specifically, in this embodiment, the size (diameter) and number of wires (number of strands) of the electrical wiring connecting the power distribution board 1 and the distribution board 2 are selected.

The information processing device 100 is comprised of a computer equipped with a CPU (Central Processing Unit) for executing control programs, a ROM (Read-Only Memory) for storing the control programs executed by the CPU, a RAM (Random Access Memory) for storing the CPU's calculation results, a communication device, and other components. The information processing device 100 performs the various functions of the information processing device 100 described herein by loading the control programs stored in the ROM into the RAM and executing them on the RAM by the CPU. The information processing device 100 may be comprised of a single computer, or it may be comprised of multiple microcomputers configured to distribute the processing of each control across these multiple computers.

As shown in Figure 1, the information processing device 100 comprises a storage unit 10 that stores information necessary for selecting electrical wiring, and a processing unit 20 that selects electrical wiring based on the information stored in the storage unit 10. Note that the configurations of the information processing device 100 shown in Figure 1 represent the functions of the information processing device 100 as virtual units and do not necessarily mean that they physically exist.

The storage unit 10 stores drawing information showing the electrical wiring routes connecting the distribution board 1 and the distribution panel 2, power supply information including the power supply voltage to the distribution panel 2 and information regarding the power supply load of the distribution panel 2, and wiring information regarding candidate electrical wiring. The drawing information, power supply information, and wiring information are pre-inputted and stored in the information processing device 100. The storage unit 10 also stores drawing creation software (so-called computational design software) capable of processing design drawings (see Figure 2) showing the arrangement of the distribution board 1 and the distribution panel 2.

The drawing information includes design drawing data, as shown in Figure 2, which includes the locations of the distribution board 1 and the switchboard 2, and the route 3 where the cable rack supporting the electrical wiring connecting the distribution board 1 and the switchboard 2 is provided. In this embodiment, the design drawing is a two-dimensional drawing showing the distribution board 1 and the switchboard 2 arranged on a plane. The cable rack route 3 corresponds to the path of the electrical wiring connecting the distribution board 1 and the switchboard 2. In this embodiment, as shown in Figure 2, one distribution board 1 and multiple switchboards 2 are included in the design drawing. Furthermore, the cable rack route 3 is composed of multiple line segments connecting the distribution board 1 and each switchboard 2.

The power supply information includes the transmission voltage from the distribution board 1 to each distribution board 2, the total load capacity of the equipment receiving power from each distribution board 2 (total load capacity), and the power supply type. The power supply type is a combination of the number of wiring phases and wires (in this embodiment, single-phase three-wire, three-phase three-wire, or three-phase four-wire) and the transmission voltage (200V or 400V).

Wiring information, as shown in Figure 3, refers to the wiring specifications (combinations of electrical wiring size and number of wires), the impedance within those specifications, and the allowable current value within those specifications. Wiring specifications are composed of multiple combinations of electrical wiring size and number of wires.

The wiring information includes an upper limit on the size of electrical wiring, and does not include information on electrical wiring exceeding this limit. In this embodiment, the upper limit on the size of electrical wiring is 250 mm. Furthermore, the wiring information is combined such that the allowable current value of a wiring specification where the size reaches the upper limit for a certain number of wires is smaller than the allowable current value of the smallest wiring specification with one more wire count than the number of wires in question. For example, as shown in Figure 2, the wiring information includes the condition of a wiring size of 100 or more and a number of wires of 2, which is the condition for the allowable current value to be greater than the allowable current value of a wiring specification with a wiring size of 250 and a number of wires of 1, which is the upper limit. On the other hand, the wiring information does not include the condition of a wiring size of less than 100 and a number of wires of 2, which would result in a smaller allowable current value than a wiring size of 250 and a number of wires of 1. This is because, in order to reduce costs, a wiring specification with fewer wires is selected if the allowable current value is the same. Therefore, in the wiring information of this embodiment, the maximum allowable current value for a given number of wiring specifications is set to be smaller than the minimum allowable current value for a wiring specification one number greater than that number. Such wiring information is stored in the storage unit 10 in the form of a list, map, or the like.

The allowable current value is calculated by multiplying a value determined by the wire type (single-core, three-core, or triplex), wire thickness, and the installation conditions and ambient temperature of the electrical wiring by a reduction rate based on the installation conditions. Since the calculation of the allowable current value is a well-known method, a detailed explanation is omitted.

Impedance can be determined by the type of wire, wire thickness, frequency, and power factor. Since the calculation of impedance is a well-known method, a detailed explanation will be omitted.

In the distribution panel 2, once the wiring specifications are selected using the information processing method described later, a number of circuit breakers (not shown) are installed corresponding to the number of selected electrical wires. The circuit breakers installed in the distribution panel 2 can be selected from multiple current capacities. Therefore, the memory unit 10 stores multiple selectable current capacities.

When the processing unit 20 receives an input signal based on the operator's input, it executes the process shown in Figure 4 to select the electrical wiring connecting the distribution board 1 and the switchboard 2.

The information processing method of this embodiment includes the steps of: obtaining the route length of electrical wiring from drawing information showing the electrical wiring routes; determining whether predetermined narrowing conditions are met for each wiring specification based on the route length, power supply information, and wiring information, and obtaining wiring specifications that meet the narrowing conditions as candidates; selecting one wiring specification from the wiring specifications that meet the narrowing conditions based on predetermined selection conditions; reflecting the size and number of electrical wiring in the selected wiring specification in the design drawing; selecting the size of the cable rack supporting the electrical wiring between each of the distribution boards 1 and distribution boards 2 based on the selected wiring specifications for each of the multiple distribution boards 2; and reflecting the size of the selected cable rack in the design drawing showing the drawing information.

The following explanation, with reference to Figure 4, describes the information processing method for selecting the electrical wiring connecting the distribution board 1 and the switchboard 2.

First, in step S10, the route length (wiring length) of the electrical wiring connecting the distribution board 2 and the switchboard 1 to be selected is obtained. Since a known method can be used to obtain the route length between switchboard 1 and distribution board 2, a detailed explanation is omitted. To briefly explain one example, the route length is obtained by searching for a route 3 from distribution board 2 to switchboard 1 and calculating the length of that route 3. In searching for route 3 from distribution board 2 to switchboard 1, with switchboard 1 as the upstream and distribution board 2 as the downstream, the search is performed to select the route 3 heading upstream when it reaches a branching point of route 3 in the cable rack. In this way, the route 3 from distribution board 2 to switchboard 1 and its route length can be obtained.

Next, in step S11, based on the path length obtained in step S10 and the information stored in the storage unit 10, it is determined whether each wiring specification shown in Figure 3 satisfies the predetermined filtering conditions. Satisfying the predetermined filtering conditions means that all of the following first, second, and third conditions are met.

The first condition is that the load current for each electrical wiring is smaller than the current capacity of each circuit breaker, which is determined according to the power transmission load of the distribution board 2, in the number of circuit breakers provided in the distribution board 2 corresponding to the number of electrical wirings. The load current for each electrical wiring is calculated using equation (1) below when the power supply type is single-phase, and using equations (2) to (4) below when the power supply type is three-phase. Note that the demand factor in single-phase and the maximum capacity load current in three-phase are determined according to the equipment and devices supplied with power from the distribution board 2. By comparing the load current for each wiring specification, calculated using the following equations, with the current capacity of the circuit breakers stored in the memory unit 10, it is determined whether the first condition is met for each wiring specification.

<Single-phase>
Load current [A] = Load capacity [VA] ÷ Transmission voltage [V] × Demand rate [%] ÷ 100 ÷ Number of wires [wires] ... (1)
<Three phase>
Maximum operating current [A] = Total load capacity [W] ÷ Transmission voltage [V] ÷ √3 ... (2)
Maximum capacity load current [A] = Maximum load capacity [W] ÷ Transmission voltage [V] ÷ √3 ... (3)
Load current "A" = (Maximum operating current [A] - Maximum capacity load current [A]) + 1.4 x Maximum capacity load current [A]... (4)

The second condition is that the allowable current value in the wiring specification is greater than the current capacity of the circuit breaker. By comparing the allowable current value of each wiring specification with the current capacity of the circuit breaker stored in the memory unit 10, it is determined whether the second condition is met for each wiring specification.

The third condition is that the voltage drop rate when electrical wiring is installed along the route according to the wiring specifications is less than or equal to a predetermined allowable value. The voltage drop rate is calculated using the following formulas (5) and (6) when the power supply is single-phase, and using the following formulas (7) and (8) when the power supply is three-phase. In this embodiment, the allowable voltage drop rate is 3%. If the voltage drop rate calculated using the following formula is 3% or less, the wiring specifications are judged to satisfy the third condition. Note that the allowable voltage drop rate is not limited to the above value and can be arbitrarily set depending on the length of the electrical wiring, etc.

<Single-phase>
Voltage drop [V] = Load current [A] × Impedance [Ω/m] × K value × Path length [m] ... (5)
Voltage drop rate [%] = Voltage drop ÷ Line voltage [V] × 100 ... (6)
<Three phase>
Voltage drop [V] = Load current [A] × Impedance × K value × Path length [m] ... (7)
Voltage drop rate [%] = Voltage drop ÷ Line voltage [V] × 100 ... (8)

Note that the K value is calculated as follows: 2 for single-phase two-wire transmission systems, 1 for single-phase three-wire systems, √3 for three-phase three-wire systems, and 1 for three-phase four-wire systems.

In step S11, a wiring specification that satisfies all of the above first, second, and third conditions is obtained as a candidate for wiring.

Next, in step S12, one wiring specification that satisfies predetermined selection criteria is selected from the candidate wiring specifications obtained in step S11. In this embodiment, the selection criterion is the smallest allowable current value. In this way, the wiring specification with the smallest allowable current value among the candidate wiring specifications is selected as the electrical wiring connecting the distribution board 2 and the switchboard 1. Furthermore, once one wiring specification is selected, the number and electrical capacity of the breakers to be installed in the distribution board 2 are determined. Specifically, for the selected wiring specification, breakers with current capacities that satisfy the first and second narrowing conditions are installed in the distribution board 2, in a number equal to the number of electrical wires in the wiring specification.

Next, in step S13, the wiring specifications (size and number of wires) of the selected electrical wiring are reflected in the design drawing stored in the memory unit 10. Specifically, the wiring specifications are written as text to the design drawing, or an object with the wiring specifications as attribute information is written (placed) to the design drawing. In other words, the drawing information stored in the memory unit 10 is updated to include the information of the selected electrical wiring.

Next, in step S14, it is determined whether the selection of electrical wiring has been completed for all distribution boards 2 included in the drawing information. If the selection of electrical wiring has not been completed for all distribution boards 2, in step S15, the distribution boards 2 for which electrical wiring selection is to be made are updated, and steps S10 to S13 are repeated to perform the selection of electrical wiring and update the drawing information.

Once the electrical wiring has been selected for all distribution boards 2, the size of the cable rack (width dimension) is selected in step S16. The width dimension refers to the direction perpendicular to the path in the plane shown in the design drawing (see Figure 2). The cable rack is selected to be large enough to support all the electrical wiring passing through that path when the wiring is arranged horizontally (without overlapping vertically). Specifically, the cable rack size is selected to be a predetermined amount larger than the width dimension of the bundle of electrical wiring, which is determined from the predetermined spacing between electrical wiring and the size and number of wires passing through that path. Therefore, for example, the size of the cable rack in path 3A, through which all the electrical wiring for all distribution boards 2 passes, is set to be larger than the size of the cable racks in paths 3B and 3C that branch off from path 3A (see Figure 2).

Next, in step S17, the cable rack size selected in step S16 is reflected in the design drawing. Specifically, the drawing software used to create the design drawing will render the selected cable rack size on the corresponding path. In other words, the cable rack object is placed on the corresponding path.

In this manner, the electrical wiring between distribution board 1 and switchboard 2 is selected.

The above describes this embodiment, but the following modifications are also within the scope of the present invention. Furthermore, it is possible to combine the configurations shown in the modifications with the configurations described in the above embodiment, or to combine the configurations described in the following different modifications.

In the above embodiment, the selection criterion is the wiring specification with the smallest allowable current value among the candidates obtained by the narrowing-down criteria. However, the selection criterion is not limited to this. For example, the selection criterion could be that the total amount of copper in the electrical wiring used in that wiring specification is the smallest, or that the total lifecycle CO2 (LCCO2) of the electrical wiring is the smallest. Furthermore, the selection criterion is not limited to one; these criterion conditions can be combined. The amounts of copper and LCCO2 can be stored in the memory unit beforehand, corresponding to the wiring specifications in the list diagram shown in Figure 3.

Furthermore, in the above embodiment, electrical wiring connecting the two-dimensionally arranged distribution board 1 and distribution board 2 was selected. In contrast, the information processing device 100 and information processing method may be used to select electrical wiring connecting the three-dimensionally arranged distribution board 1 and distribution board 2.

Furthermore, the information processing device 100 may be configured, in whole or in part, as a cloud server located in a cloud environment.

Furthermore, the series of processes performed by the information processing device 100 described above may be provided to a computer as a program for execution.

In other words, the program according to the above embodiment causes the information processing device 100 (a computer) to execute the following steps: obtaining the route length of the electrical wiring from drawing information showing the electrical wiring route; determining whether each wiring specification satisfies predetermined filtering conditions based on the route length, power supply information, and wiring information, and obtaining wiring specifications that satisfy the filtering conditions as candidates; and selecting one wiring specification from the wiring specifications that satisfy the filtering conditions based on predetermined selection conditions.

Furthermore, the program for executing the series of processes described above is provided on a storage medium readable by the information processing device 100. Alternatively, the program may be provided to the information processing device 100 via a network line.

The above embodiments provide the following effects.

In this embodiment, by inputting diagram information showing the routes of the distribution board 1 and the switchboard 2, power supply information related to power transmission and loads for the switchboard 2, and wiring information for candidate wiring specifications into the computer, the computer automatically selects the appropriate wiring specifications. Therefore, compared to manual calculations, the selection of electrical wiring can be performed more efficiently and accurately.

Furthermore, in this embodiment, in addition to selecting electrical wiring, the size of the cable rack is selected, and the cable rack is written (reflected) on the design drawings. This makes the cable rack size visible, promoting information sharing and clarity in equipment design, and thereby improving work efficiency.

Furthermore, by including copper content and LCCO2 emissions as selection criteria when choosing a wiring specification from among the candidate specifications, it is possible to achieve cost reduction, energy savings, and decarbonization. Additionally, by selecting a specification with a low copper content, the weight of the electrical wiring can be reduced, thus improving work efficiency.

Although embodiments of the present invention have been described above, these embodiments represent only a portion of the applications of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments.

100 Information Processing Device 1 Distribution Board 2 Power Distribution Panel 10 Storage Unit 20 Processing Unit

Claims (6)

A computer-based information processing method for selecting electrical wiring to connect a distribution board and a switchboard,
The aforementioned computer includes:
Drawing information showing the route of the electrical wiring connecting the distribution board and the switchboard,
Power supply information including the power supply voltage to the distribution board and information regarding the power supply load of the distribution board,
The system stores wiring information that associates multiple wiring specifications, which are combinations of the size and number of wires of the aforementioned electrical wiring, with the impedance and allowable current values for those wiring specifications.
The aforementioned information processing method is:
The steps include obtaining the route length of the electrical wiring from the drawing information showing the route of the electrical wiring,
The steps include: determining whether a predetermined filtering condition is met for each wiring specification based on the path length, power supply information, and wiring information, and acquiring the wiring specifications that meet the filtering condition as candidates;
The process includes the step of selecting one wiring specification from the wiring specifications that satisfy the narrowing conditions based on predetermined selection criteria,
The aforementioned filtering conditions are:
The first condition is that the load current for each strand of the electrical wiring is smaller than the current capacity of each circuit breaker, which is determined according to the power transmission load of the distribution board, in the number of circuit breakers provided in the distribution board in proportion to the number of strands of the electrical wiring.
The second condition is that the allowable current value in the wiring specification is greater than the current capacity of the breaker,
The third condition is that the voltage drop rate when the electrical wiring is routed according to the wiring specifications is less than or equal to a predetermined allowable value, and all of the above conditions are met.
Information processing methods. The information processing method according to claim 1,
The computer stores a plurality of wiring specifications, each of which has an upper limit size set for the electrical wiring, and the computer stores a plurality of wiring specifications in which the allowable current value of a wiring specification whose size reaches the upper limit size for a certain number of wires is smaller than the allowable current value of the wiring specification with the smallest size among the wiring specifications having one more wire than the number of wires in question.
Information processing methods. The information processing method according to claim 1 or 2,
The selection criterion is that the allowable current value is the smallest.
Information processing methods. The information processing method according to claim 1 or 2,
The computer receives input including the drawing information and power supply information for multiple distribution boards, and size information for cable racks that support the electrical wiring.
For each of the multiple distribution boards, the wiring specifications for the electrical wiring to be connected to the distribution board are selected by the computer.
The steps performed by the aforementioned computer include:
A step of selecting the size of the cable rack that supports the electrical wiring to be wired between each of the distribution boards, based on the wiring specifications selected for each of the multiple distribution boards,
The step of reflecting the selected cable rack size in a drawing showing the drawing information further includes:
Information processing methods. The information processing method according to claim 1 or 2,
The step further includes reflecting the size and number of electrical wires in the selected wiring specification in the drawing,
Information processing methods. An information processing device for selecting electrical wiring to connect a distribution board and a switchboard,
A memory unit that stores information,
The system includes a processing unit that selects the electrical wiring based on the information stored in the storage unit,
The aforementioned storage unit is
Drawing information showing the route of the electrical wiring connecting the distribution board and the switchboard,
Power supply information including information on the transmission voltage and transmission load from the aforementioned distribution board,
The system stores wiring information that associates multiple wiring specifications, which are combinations of the size and number of wires of the aforementioned electrical wiring, with the impedance and allowable current values of those wiring specifications.
The aforementioned processing unit,
The route length of the electrical wiring is obtained from the drawing information showing the route of the electrical wiring.
Based on the aforementioned path length, power supply information, and wiring information, it is determined whether each wiring specification satisfies predetermined filtering conditions, and the wiring specifications that satisfy the filtering conditions are acquired as candidates.
Based on pre-set selection criteria, one wiring specification is selected from the wiring specifications that satisfy the narrowing criteria.
The aforementioned filtering conditions are:
The first condition is that the load current for each strand of the electrical wiring is smaller than the current capacity of each circuit breaker, which is determined according to the power transmission load of the distribution board, in the number of circuit breakers provided in the distribution board in proportion to the number of strands of the electrical wiring.
The second condition is that the allowable current value in the wiring specification is greater than the current capacity of the breaker,
The third condition is that the voltage drop rate when the electrical wiring is routed according to the wiring specifications is less than or equal to a predetermined allowable value, and all of the above conditions are met.
Information processing device.