Information processing method and information processing apparatus

Abstract

To efficiently select electrical wiring.SOLUTION: An information processing method to be executed by a computer includes the steps of: acquiring the route length of electrical wiring from drawing information showing the route of the electrical wiring; acquiring wiring specifications that satisfy a narrowing down condition as a candidate on the basis of the route length, power supply information, and wiring information; and selecting one wiring specification from the wiring specifications satisfying the narrowing down condition on the basis of a selection condition set in advance. The narrowing down condition satisfies all of a first condition that the load current of each piece of the electrical wiring is smaller than the current capacity of each breaker determined in accordance with a power transmission load of a power distribution board in breakers provided in the power distribution board with a number corresponding to the number of pieces of the electrical wiring, a second condition that an allowable current value in the wiring specification is larger than the current capacity of the breaker, and a third condition that a voltage drop rate in the case that electrical wiring is placed to the route according to the wiring specification is equal to or less than an allowable value set in advance.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an information processing method and an information processing apparatus.

Background Art

[0002] Patent Document 1 discloses a wiring route drawing input method for accurately generating three-dimensional wiring route data by indicating a drawing position on CAD, displaying a path cross-section passing through a specified point, and indicating a wiring route while displaying a plurality of wiring route patterns to determine the wiring route.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As disclosed in Patent Document 1, various techniques for improving the efficiency of creating a wiring route of electrical wiring are known.

[0005] On the other hand, the selection of the size and number (number of wires) of the electrical wiring to be wired on the wiring route has sometimes been conventionally performed by manual calculation. Therefore, there is a need to efficiently perform the selection of electrical wiring.

[0006] An object of the present invention is to efficiently perform the selection of electrical wiring.

Means for Solving the Problems

[0007] 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 a step of obtaining the route length of the electrical wiring from the drawing information showing the route of the electrical wiring, and a 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 satisfy the narrowing conditions, and selecting one wiring specification from the wiring specifications that satisfy the narrowing conditions based on pre-set selection conditions, wherein the narrowing conditions satisfy all of the following: firstly, the load current for each electrical wire is smaller than the current capacity for each breaker, which is determined according to the power transmission load of the distribution board in the number of breakers installed in the distribution board corresponding to the number of electrical wires; secondly, the allowable current value in the wiring specification is larger than the current capacity of the breaker; and thirdly, the voltage drop rate when electrical wires are routed according to the wiring specification is less than or equal to a pre-set allowable value.

[0008] 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 conditions. The filtering conditions are that all of the following conditions are met: firstly, the load current for each electrical wire is smaller than the current capacity for each breaker, which is determined according to the power transmission load of the distribution board in the number of breakers installed in the distribution board corresponding to the number of electrical wires; secondly, the allowable current value in the wiring specification is larger than the current capacity of the breaker; and thirdly, the voltage drop rate when electrical wires are routed according to the wiring specification is less than or equal to a pre-set allowable value. [Effects of the Invention]

[0009] According to the present invention, the selection of electrical wiring can be performed efficiently. [Brief explanation of the drawing]

[0010] [Figure 1] This is a block diagram showing the configuration of an information processing device according to an embodiment of the present invention. [Figure 2] This figure shows an example of a design drawing of an embodiment of the present invention. [Figure 3] This is a list diagram showing wiring information in an embodiment of the present invention. [Figure 4] This is a flowchart illustrating an information processing method according to an embodiment of the present invention. [Modes for carrying out the invention]

[0011] Hereinafter, an information processing apparatus 100 and an information processing method according to an embodiment of the present invention will be described with reference to the drawings.

[0012] The information processing device 100 and information processing method of this embodiment perform the process of selecting electrical wiring (main lines) that connect a power distribution board 1 and a 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 that connects the power distribution board 1 and the distribution board 2 are selected.

[0013] The information processing device 100 is comprised of a computer equipped with a CPU (Central Processing Unit) that executes control programs, a ROM (Read-Only Memory) that stores the control programs executed by the CPU, a RAM (Random Access Memory) that stores the calculation results of the CPU, a communication device, and the like. 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 and configured to distribute the processing of each control among the multiple computers.

[0014] As shown in Figure 1, the information processing device 100 includes 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 exist physically.

[0015] The memory 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 memory 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.

[0016] 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 route 3, where a 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. Route 3 of the cable rack corresponds to the route 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, route 3 of the cable rack is composed of multiple line segments that connect the distribution board 1 and each switchboard 2.

[0017] 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).

[0018] Wiring information, as shown in Figure 3, is a combination of wiring specifications (the size and number of wires in the electrical wiring), the impedance in those wiring specifications, and the allowable current value in those wiring specifications. Wiring specifications consist of multiple combinations of the size and number of wires in the electrical wiring.

[0019] The wiring information has an upper limit size set for the electrical wiring, and information on electrical wiring exceeding the upper limit size is not included. In this embodiment, the upper limit size of the electrical wiring is 250 [mm]. Also, the wiring information is combined such that the allowable current value of the wiring specification with the size reaching the upper limit size at a certain number of wires is smaller than the allowable current value in the wiring specification with the smallest size among the wiring specifications with one more number of wires than that number. For example, as shown in FIG. 2, the wiring information includes a condition where the wiring size is 100 or more and the number of wires is 2 as a condition where the allowable current value is larger than the allowable current value in the wiring specification with the wiring size of 250 (the upper limit size) and the number of wires of 1. On the other hand, the wiring information does not include a condition where the wiring size is less than 100 and the number of wires is 2, which has an allowable current value smaller than that of the wiring size of 250 and the number of wires of 1. This is for selecting a wiring specification with a smaller number of wires if the allowable current values are the same in order to reduce costs. Therefore, in the wiring information of this embodiment, the maximum value of the allowable current value of the wiring specification for a certain number of wires is combined to be smaller than the minimum value of the allowable current value of the wiring specification for the number of wires one more than that number. Such wiring information is stored in the storage unit 10 in a form such as a list or a map.

[0020] The allowable current value is a value calculated by multiplying a value determined by the wire type (single-core, three-core, tripleplex), wire thickness, and the laying condition and ambient temperature of the electrical wiring by a reduction rate due to the laying condition. Since the calculation of the allowable current value is well-known, detailed description is omitted.

[0021] The impedance can be obtained from the wire type, wire thickness, frequency, and power factor. Since the calculation of the impedance is also well-known, detailed description is omitted.

[0022] When the wiring specification is selected by the information processing method described later in the distribution board 2, circuit breakers (not shown) are provided according to a number corresponding to the number of selected electrical wiring. The circuit breakers provided in the distribution board 2 can be selected from those with a plurality of current capacities. Therefore, a plurality of selectable current capacities are stored in the storage unit 10.

[0023] When the processing unit 20 receives an input signal based on an operator's operation input or the like, it executes the processing shown in FIG. 4 to select an electrical wiring for connecting the switchboard 1 and the distribution board 2.

[0024] The information processing method of the present embodiment includes: a step of obtaining the route length of the electrical wiring from the drawing information showing the route of the electrical wiring; a step of determining whether a predetermined narrowing condition is satisfied for each wiring specification based on the route length, power source information, and wiring information, and obtaining the wiring specifications that satisfy the narrowing condition as candidates; a step of selecting one wiring specification from the wiring specifications that satisfy the narrowing condition based on a predetermined selection condition; a step of reflecting the size and number of the electrical wiring in the selected wiring specification on the design drawing; a step of selecting the size of the cable rack that supports the electrical wiring wired between each of the plurality of distribution boards 2 and the switchboard 1 based on the selected wiring specification; and a step of reflecting the selected size of the cable rack on the design drawing showing the drawing information.

[0025] Hereinafter, an information processing method for selecting an electrical wiring for connecting the switchboard 1 and the distribution board 2 will be described with reference to FIG. 4.

[0026] First, in step S10, the route length (total wiring length) of the electrical wiring for connecting the distribution board 2 to be selected and the switchboard 1 is obtained. Since a known method can be used to obtain the route length between the switchboard 1 and the distribution board 2, a detailed description thereof will be omitted. To briefly explain an example, the route length is obtained by searching for route 3 from the distribution board 2 to the switchboard 1 and calculating the length of that route 3. In the search for route 3 from the distribution board 2 to the switchboard 1, with the switchboard 1 as the upstream and the distribution board 2 as the downstream, when reaching a branch portion of route 3 of the cable rack, the search is performed to select route 3 towards the upstream side. By doing so, the search for route 3 from the distribution board 2 to the switchboard 1 and its route length can be obtained.

[0027] 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 predetermined filtering conditions. Satisfying the predetermined filtering conditions means that all of the following first, second, and third conditions are met.

[0028] 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 determined by equation (1) below when the power supply type is single-phase, and by equations (2) to (4) below when the power supply type is three-phase. The demand factor in single-phase and the maximum capacity load current in three-phase are determined according to the equipment and devices to which power is supplied from the distribution board 2. By comparing the load current for each wiring specification, which is determined by the following equation, 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.

[0029] <Single-phase> Load current [A] = Load capacity [VA] ÷ Transmission voltage [V] × Demand factor [%] ÷ 100 ÷ Number of wires [wires] ... (1) <Three phase> Maximum operating current [A] = Total load capacity [W] ÷ Transmission voltage [V] ÷ √3 ... (2) Maximum 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)

[0030] 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.

[0031] 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 type is single-phase, and using the following formulas (7) and (8) when the power supply type is three-phase. In this embodiment, the allowable value for the 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 value for the voltage drop rate is not limited to the above value and can be arbitrarily set depending on the length of the electrical wiring to be laid, etc.

[0032] <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)

[0033] The K value is calculated as follows: 2 for single-phase two-wire transmission, 1 for single-phase three-wire transmission, √3 for three-phase three-wire transmission, and 1 for three-phase four-wire transmission.

[0034] In step S11, a wiring specification that satisfies all of the above first, second, and third conditions is obtained as a candidate for wiring.

[0035] 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.

[0036] 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 to the design drawing as text, or an object having the wiring specifications as attribute information is written to (placed) in 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.

[0037] 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 the electrical wiring is to be selected are updated, and steps S10 to S13 are repeated to select the electrical wiring and update the drawing information.

[0038] 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 is 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 size of the cable rack 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 electrical wiring passing through that path. Therefore, for example, the size of the cable rack in path 3A, through which 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).

[0039] 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.

[0040] In this manner, the electrical wiring between distribution board 1 and distribution board 2 is selected.

[0041] Although this embodiment has been described above, 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.

[0042] 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 criterion. However, the selection criterion is not limited to this. For example, the selection criterion may be that the amount of copper in the entire electrical wiring used in that wiring specification is the smallest, or that the life cycle CO2 (LCCO2) of the entire electrical wiring is the smallest. Furthermore, the selection criterion is not limited to one, but may be a combination of these criterion conditions. The amount of copper and LCCO2 can be associated with the wiring specification in the list diagram shown in Figure 3 and stored in the memory in advance.

[0043] Furthermore, in the above embodiment, electrical wiring was selected to connect the two-dimensionally arranged power distribution board 1 and distribution board 2. In contrast, the information processing device 100 and information processing method may be used to select electrical wiring to connect the three-dimensionally arranged power distribution board 1 and distribution board 2.

[0044] Furthermore, the information processing device 100 may be configured, in whole or in part, as a cloud server located in a cloud environment.

[0045] Furthermore, the series of processes in the information processing device 100 described above may be provided to a computer as a program for execution.

[0046] In other words, the program according to the above embodiment causes the information processing device 100, which is a computer, to perform the following steps: obtaining the route length of electrical wiring from drawing information showing the electrical wiring route; 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; and selecting one wiring specification from the wiring specifications that meet the narrowing conditions based on predetermined selection conditions.

[0047] Furthermore, the program for executing the series of processes described above is provided by 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.

[0048] According to the above embodiments, the following effects are achieved.

[0049] 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, the selection of electrical wiring can be performed more efficiently and accurately compared to manual calculations.

[0050] 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. As a result, the cable rack size is made visible, which promotes the sharing and clarification of information in equipment design and can improve work efficiency.

[0051] 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 reduce costs, save energy, and decarbonize the process. In addition, by selecting a specification with a low copper content, the weight of the electrical wiring can be reduced, which can improve work efficiency.

[0052] Although embodiments of the present invention have been described above, these embodiments only represent a part of the application examples 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. [Explanation of symbols]

[0053] 100 Information Processing Devices 1 Switchboard 2 Distribution boards 10 Storage section 20 Processing Units

Claims

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

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