JP2006301895A - Program for supporting design of power trunk line in apartment house - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein the design of power trunk lines in apartment houses, which has been made manually by electrical designers in the absence of dedicated design tools, cannot necessarily produce minimum cost design results not only because the electrical designers' experience and knowledge cause differences but also because the design does not consider all the combinations of all conceivable wiring patterns and trunk and branch line diameters. <P>SOLUTION: An automatic design system configures databases of data on technical standards, laws and regulations, and examines all wiring patterns for compliance with the standards and regulations to output a minimum cost wiring pattern. A minimum cost trunk line can thus be designed shortly irrespective of the designer's experience and ability. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power trunk line design support system constructed in an apartment house.

Electric Construction Technology (February 2002 issue) Issue: Ohm Co., Ltd. p.19 Monthly report (July 2004 issue) July 1, 2004 Issued by: Economic Research Committee, p.490 Construction construction standard walk (40th revised edition) August 25, 2003 Issued by: Price Survey Committee, Japan, p.1049

  Currently, the design of power trunk lines in apartment houses is performed by an electrical equipment designer based on the flowchart shown in FIG. 18 (Non-Patent Document 1).

Hereinafter, each process in the conventional design flowchart will be described.
1.1 Assumption of the load P per dwelling unit is a process of determining the load per dwelling unit by a meeting between the business owner of the newly built apartment house and the electrical equipment designer.
2. The selection of the trunk line system depends on the design design of the apartment house by the design designer. The electrical equipment designer determines whether to adopt a vertical method or a horizontal method based on the design drawing of the apartment house by the design designer.
3. The assumption of the number of dwelling units per trunk line is a process of determining how many dwelling units are accommodated per trunk line. Specifically, for example, when laying trunk lines for 10 dwelling units, we are examining wiring patterns such as whether 10 trunks are accommodated by one trunk line, or 5 houses are accommodated by two trunk lines. .
4). The determination of the diameter of the trunk line / branch line is a process of determining the minimum diameter of the trunk line and the branch line so as to satisfy the allowable voltage drop value determined by the allowable current of the cable and legal regulations. -Generally, a method is used in which the branch wire is first fixed to 14φ, which is defined as the minimum wire diameter in accordance with the extension, and the trunk wire diameter is determined so as to satisfy the allowable current and allowable voltage drop of the cable. ing.
5. Examination of construction methods, suitability of overcurrent circuit breakers, necessity of branch circuit breakers, and study of suitability for total voltage drop are all technical standards and laws regarding wiring design of apartment buildings It is an examination process related to regulation, and is a process of judging whether the technical standard and the regulation are satisfied as a result of wiring design.
6). In the comprehensive evaluation, the evaluation mainly relates to economic efficiency. In other words, consider whether there are cheaper design results. If there are no problems in the overall evaluation, the design of the power trunk is completed.

  In addition, since the structure of the apartment house changes for every property, since it is difficult to create a design tool, the design of the power trunk line of this apartment house is all performed manually.

  In the conventional design flow described above, items that depend particularly on the knowledge and experience of the electrical equipment designer are the assumption of the number of dwelling units per trunk, the determination of the diameter of the trunk and branch lines, and comprehensive evaluation.

First, the assumption of the number of dwelling units per main line is, for example, when there are four main wiring patterns as shown in FIG. The relationship between the number of dwelling units n and the wiring pattern X can be expressed by the following equation.
X = 2 ^n-1
Therefore, when laying trunk lines for 10 dwellings per row, there are 512 patterns. If an apartment house has 10 columns and 10 rows, 512 × 10 = 5,120 patterns. Since it is impossible to manually perform wiring design for all of these wiring patterns, conventional electrical equipment designers select the most probable wiring pattern based on their experience and knowledge, and perform wiring design. Yes.

Next, the conventional method for determining the diameter of a trunk line / branch line is to fix the branch line diameter to 14φ, which is determined to be the minimum diameter in accordance with the extension regulations, and then to allow current and voltage drop of the cable. It is common to select a trunk wire diameter that satisfies the value.
FIG. 15 shows the diameters of trunk lines and branch lines that are generally used in AC distribution networks. Wire diameters used for branch lines include 22φ and 38φ in addition to 14φ.
In the case of laying with a single trunk line in a 10-story building shown in FIG. 16, the trunk wire diameter is 150φ and the branch wire diameter is 14φ in the conventional design method. However, it is also conceivable that the trunk wire diameter can be made 100φ by increasing the branch wire diameter to 22φ. Comparing these two wiring costs, when the main wire diameter is 150φ and the branch wire diameter is 14φ, it is 522,818 yen, whereas the main wire diameter is 100φ and the branch wire diameter is 22φ. In this case, the cost is 409,592 yen, and the cost is lower than the design in which the branch wire diameter is fixed to 14φ first. Therefore, it can be seen that the conventional design method of fixing the branch wire diameter to 14φ and then selecting the main wire diameter satisfying the allowable voltage drop value does not always give an optimum design result in view of cost.

  In calculating the cost, the cable article cost and construction cost per 1 m per wire diameter shown in FIG. 17 were used. The numerical values shown in FIG. 17 are obtained by extracting the article cost and the construction cost necessary for laying the cable from the accumulated data (Non-Patent Document 2) and the construction work standard step (Non-Patent Document 3). Note that the cost of goods corresponds to cables, terminal processing materials, and other consumables. Terminal processing materials and other consumables are accounted for as 5% of cable article costs.

  From the above, when using the conventional power trunk line design method for apartment houses, not only will there be a difference depending on the experience and knowledge of the electrical equipment designer, but also all possible wiring patterns, trunk lines, and branch wire diameters. Since all the combinations are not designed, there has been a problem that the lowest cost design result is not always obtained.

  The present invention (1) generates a plurality of wiring patterns based on stored data and input data, performs wiring design and cost calculation for a plurality of combinations of wiring wire diameters and the wiring patterns, and calculates the minimum cost from the result of the wiring design. This is a power house trunk line design support program for collective housing, which has a function of searching for a wiring pattern and a wiring wire diameter, and storing and / or displaying a wiring pattern, a wiring wire diameter, and a cost that are the minimum cost. .

  The present invention (2) is the power trunk line design support program for an apartment house according to the invention (1), wherein the wiring design and the cost calculation are performed for all combinations of the wiring wire diameter and the wiring pattern. It is.

  According to the present invention (3), the stored data includes cable data including the wire diameter and allowable current of wiring, accumulated data including article costs and construction costs related to power wiring, and technical standards and laws and regulations related to power trunk line design. The invention (1) or the invention characterized in that the input data comprises housing structure data relating to a housing structure, wiring data relating to a wiring condition, and electrical data relating to a distribution condition. It is a power trunk line design support program for an apartment house according to the invention (2).

  The present invention (4) is a power main line design method for performing power main line design of an apartment house using the power main line design support program of the invention (1) to the invention (3).

  The present invention (5) is a recording medium storing the power trunk line design support program of the inventions (1) to (3).

  The present invention (6) includes at least the power trunk line design support program of the inventions (1) to (3), an input device for inputting the input data, a display device, and a storage device for storing the storage data. And a power trunk line design support system comprising a computing device that executes the power trunk line design support program.

  The present invention (7) is characterized in that a GUI that allows a designer to input the input data interactively is displayed on the display device during execution of the power trunk line design support program. 6) Power trunk line design support system.

(1) Even electrical system designers with little design experience can now design the optimal distribution network at the lowest cost and in compliance with technical standards and regulations.
(2) The variation in the design quality of the power trunk line by the designer has been eliminated.
(3) The design efficiency has been improved by reducing the design man-hours for power trunk line design.

Hereinafter, the best mode of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a design support system according to the present invention, FIG. 2 is an overall flowchart of the design support program of the present invention, FIG. 3 is a flowchart of a wiring design unit of the design support program of the present invention, and FIG. 4 to 12 are diagrams showing examples of design condition input screens using the design support system of the present invention, and FIG. 13 is an example of design documents calculated by the design support system of the present invention and displayed on the display. FIG.

(Design support system)
In FIG. 1, 1 is a power trunk line design support program, 2 is an MPU, 3 is a storage unit, 4 is an input interface, 5 is an output interface, 6 is a keyboard, 7 is a mouse, 8 is a display, 9 is a printer, and 10 is a storage. An apparatus, 11 is a design design document for an apartment house by a design designer, and 12 is a personal computer.
As shown in FIG. 1, the personal computer 12 has an input interface 4 and an output interface 5 for transmitting / receiving data to / from an external device, an MPU 2 for performing design support processing, and data necessary for the MPU 2 to perform design processing. The memory | storage part 3 memorize | stored is provided.
In the storage unit 3, for example, data such as a cable database 3-1, an integration database 3-2, a safety condition 3-3, storage data X3-4, storage data Y3-5, storage data Z3-6, and the like are stored. Yes.
As a computer used in the system, a computer other than a personal computer such as a mini computer or a large computer may be used instead of the personal computer 12.
Although not shown, the personal computer 12 includes a system ROM that stores a program for operating the computer, a memory that is used during the execution of the MPU 2, and the like.
A keyboard 6 and a mouse 7 are connected to the input interface 4 as external devices. The output interface 5 is connected to a display 8, a printer 9, and a storage device 10 as external devices.

The power trunk line design support program 1 is installed in the personal computer 12 and executed by the MPU 2.
The electrical facility designer reads the data necessary for wiring design from the design design document 11 of the apartment house by the design designer, and instructs, selects, selects, and selects via the keyboard 6 and the mouse 7 while looking at the GUI displayed on the display 8. By inputting data, the power trunk line design support program 1 can be operated in a so-called interactive manner to perform wiring design.

Next, data stored in the storage unit 3 will be described.
-In the cable database 3-1, the diameters and allowable currents of cables used for the trunk line and branch line are registered.
-In the integration database 3-2, the cost of goods for cables, cable terminals, and circuit breakers used in power trunk line design, and the cost of cable laying, cable terminal processing, and installation of circuit breakers for wiring are registered.
・ In safety condition 3-3, information on technical standards and laws and regulations for safely building power trunk lines is registered. Specifically, information on the overall demand rate, information on the allowable value of the voltage drop value, information on installation of the branch circuit switch and overcurrent breaker, and the like.

(Overall flow chart of design support program)
Next, the design flow using the power trunk line design support program 1 will be described in detail with reference to the overall flowchart of the design support program of the present invention shown in FIG. It is assumed that the cable database 3-1, the integration database 3-2, and the safety condition 3-3 in the storage unit 3 are registered in advance and do not need to be corrected in individual design work.

When performing a design work using the power trunk line design support program 1, a design design document 11 for an apartment house by a design designer is prepared in advance.
First, collective housing structure conditions, wiring conditions, and electrical conditions are input. When the power trunk line design support program 1 is started, a screen for selecting a pipe shaft structure shown in FIG. 4 is automatically displayed on the display 8. The pipe shaft is a through-hole for passing a power trunk line, and it is divided into one place in one dwelling unit or one place shared by two dwelling units depending on the structure of the apartment house. Refer to the design plan 11 of the housing complex by the design designer, determine whether the housing complex to be designed will be one location in one dwelling unit, or share one location in two dwelling units, and the appropriate pipe Select the shaft structure (one for one or one for two).

  Next, the display 8 automatically displays a screen for selecting and inserting the dwelling unit status, the position of the electric room, and the distance between the first floor dwelling units from the electric room distribution board shown in FIG. The dwelling unit situation can be specified by referring to the design design document 11 of the apartment house by the design designer and pressing the button at the location where the dwelling unit is located. The location of the electrical room can be specified by selecting the button at the top of the screen. Refer to the design plan 11 of the apartment house by the design designer. For example, if the electrical room is at the edge of the apartment house, click the leftmost button at the top of the screen, and if the electrical room is in the center of the apartment house You can select the center button at the top of the screen. The distance between each electrical unit on the first floor from the electrical room distribution panel is calculated from the design plan 11 of the apartment house by the design designer, and the distance of the route that can be wired from the electrical panel distribution panel to each residential unit on the first floor is integrated. This can be specified by entering a numerical value in the numerical input space of the corresponding column below the surface. Note that the previously input numerical value may be displayed by pressing a button or the like above the numerical value input space.

  Next, a screen for entering the height, width, and distance between the main line and the distribution board for dwelling units shown in FIG. 6 is automatically displayed on the display 8. Reads the height, width, and the distance between the main line and the distribution board for the dwelling unit from the design design document 11 of the apartment house by the design designer. 1 Between the height, width and main line of the dwelling unit and the distribution board for the dwelling unit The distance can be specified by entering a numerical value. Note that the previously input numerical value may be displayed by pressing a button or the like above the numerical value input space.

  Next, a screen for selecting the number of cores of the power distribution network shown in FIG. By pressing the appropriate button, you can specify the number of cores (2 cores or 3 cores) of the power distribution network. Although the type of cable is limited to EM-CE here, a plurality of types of cables may be listed here so that the type of cable and the number of wire cores can be selected.

  Next, a screen for inputting the bus voltage of the distribution network shown in FIG. 8 is automatically displayed on the display 8. The bus voltage can be specified by inputting a voltage value, for example, 200 in the case of 200V, into the numerical input space. Note that the previously input numerical value may be displayed by pressing a button or the like on the left side of the numerical value input space.

  Next, a screen for inputting the allowable voltage drop value shown in FIG. 9 is automatically displayed on the display 8. The allowable voltage drop value can be specified by inputting the voltage drop value numerically in the numerical input space. The upper limit value of the allowable voltage drop value is determined according to the extension rule. When a voltage drop value greater than the upper limit specified in the extension regulations is input, an error display is issued and the input voltage is restarted, so that the safety condition is satisfied. Further, the previously input numerical value may be displayed by pressing a button or the like on the left side of the numerical value input space.

  Next, a screen for selecting a cable laying environment shown in FIG. 10 is automatically displayed on the display 8. The allowable current value of the cable changes depending on whether the cable is put in a conduit or fixed to a cable rack or the like for air wiring. The cable laying environment (pipe or air) can be specified by referring to the design design document 11 of the apartment house by the design designer and selecting the appropriate one.

  Next, a screen for inputting the maximum demand power of one consumer shown in FIG. 11 is automatically displayed on the display 8. As stated earlier, the maximum power demand of one consumer is determined by a meeting between the business owner of the newly built apartment building and the electrical equipment designer. It can be specified by input. Note that the previously input numerical value may be displayed by pressing a button or the like on the left side of the numerical value input space.

  Next, a screen for inputting the upper limit value of the number of main branch branches shown in FIG. 12 is automatically displayed on the display 8. When considering the wiring pattern, the area of the pipe shaft must be taken care of. In the case of a wiring pattern in which a plurality of trunk lines are laid, the cross-sectional area of the cable is larger than that of a single trunk line. Since the area of the pipe shaft is determined by the design designer, the electrical equipment designer must design the trunk line so as to fit within the area. Here, in order to delete in advance a wiring pattern that cannot be laid out due to space, an upper limit value of the number of trunk branches is input. The upper limit value of the number of main branch branches can be specified by referring to the design design document 11 of the apartment house by the design designer and inputting a numerical value.

  As described above, when the input of the conditions is completed, the power trunk line design support program 1 aggregates the number of units in each row of the apartment house and the distance between the units from the electrical room distribution panel from the input conditions. Thereafter, a wiring pattern is generated from the input conditions. Next, for each generated wiring pattern, wiring design is performed for all combinations of trunk lines and branch line diameters. Specifically, calculation of demand rate, calculation of load current value, calculation of wire length, selection of circuit breaker capacity and number of wiring, determination of allowable current value, calculation and determination of voltage drop value at each dwelling unit , Integrating. Here, when the previously set condition and safety condition are not satisfied, for example, when the voltage drop value exceeds the allowable value, the result that the design is impossible is output without performing integration.

  When the wiring design for all combinations of trunk and branch wire diameters is completed, the combination of the trunk and branch wire diameters that finds the lowest cost is searched for among the design results, and the combination of trunk and branch wire diameters. Save the selected wiring pattern and cost. Thereafter, the designs for all the generated wiring patterns are calculated and stored in the same manner.

Next, in the design results stored earlier, search for the wiring pattern with the lowest cost, and in the wiring pattern, the circuit breaker capacity for wiring, the trunk branch line diameter and length, the voltage drop value,
The cost and the wire length by cable diameter are automatically displayed on the display 8.

(Flowchart of the wiring design department of the design support program)
The detailed processing flow of the power trunk line design support program 1 will be described in detail with reference to the flowchart of the wiring design unit in the design support program of the present invention shown in FIG. Here, the flowchart after the input of the cable database 3-1, the integration database 3-2, the input of the safety condition 3-3, the correction process, the apartment housing structure condition, the wiring condition, and the electrical condition is shown.

1. Wiring design For example, if there are 4 rows of apartment houses (i = 4, A _{1 to} A ₄ ), 5 houses in each row, and the upper limit of the number of main branch branches is 5, the number of wiring patterns per row 16 patterns (j = 16, B _{1 to} B ₁₆ ) × 4 columns = 64 patterns. As shown in FIG. 15, there are 14 combinations (k = 14, C _{1 to} C ₁₄ ) of the main line and branch line diameters. First, a wiring design is performed for the combination C ₁ of the A ₁ row, the wiring pattern B ₁ , the main line, and the branch wire diameter.
2. Confirmation of safety conditions Next, whether the result satisfies safety conditions such as allowable cable current value, allowable voltage drop value, branch circuit switch and overcurrent circuit breaker installation requirements, and circuit breaker capacity for wiring. Make a decision.
3. Storage of data X If the safety condition is satisfied, the cost at that time is stored in the storage data X3-4. If the safety condition is not satisfied, the cost column is stored in the stored data X3-4 as wiring is not possible.
4). Mains steps above save data Y, a combination C ₁ branch line wire diameter, trunk, after repeated until combined C ₁₄ branch line wire diameter, of the stored data X3-4, most cost inexpensive trunk, The combination of the branch wire diameters is searched, and the information on the main line, the branch wire diameter combination C _x1 , the wiring pattern B ₁ , and the cost at the lowest cost is stored in the storage data Y3-5.
5. Storage of Data Z Next, wiring design is performed for the combination C ₁ of the A ₁ row, the wiring pattern B ₂ , the main line, and the branch wire diameter. At this time, the stored data X3-4 is erased at the same time. As before, trunk, trunk combination C ₁ branch line wire diameter, after up to a combination C ₁₄ branch line wire diameter, of the newly written data stored X3-4, most cost inexpensive trunk, branch lines The combination of the wire diameters is searched, and the information on the trunk line, the branch wire diameter combination C _x2 , the wiring pattern B ₂ , and the cost at the lowest cost is stored in the storage data Y3-5. After this is performed up to the wiring pattern B ₁₆ , the wiring pattern with the lowest cost is searched from the stored data Y 3-5, and the wiring pattern with the lowest cost, the combination of the trunk and branch wire diameters, and the cost are stored. Save to data Z3-6. When saving to the save data Z3-6 is completed, the contents of the save data X3-4 and the save data Y3-5 are erased. Thereafter, similarly designed _two rows after A, determination, perform a search, the most cost inexpensive wiring patterns in each row, trunk, branch lines wire diameter, will save costs.
6). Display of Design Results After completing the design results in all columns, the design results stored in the storage data 3 are automatically displayed on the display 8 as shown in FIG. The display contents here are design date, column number, trunk line number, number of units per column, circuit breaker capacity, line type, wire diameter of trunk line and branch line, span length of trunk line and branch line, load current, Demand rate, design current, maximum voltage drop value for each trunk line, wire length for each cable diameter, cost, material cost, labor cost. You may increase an item as needed.

It is a block diagram which shows the structure of the design support system which concerns on this invention. It is a flowchart of the whole design support program of this invention. It is a flowchart of the wiring design part in the design support program of this invention. It is a figure which shows the example of the design condition input screen using the design support system of this invention. It is a figure which shows the example of the design condition input screen using the design support system of this invention. It is a figure which shows the example of the design condition input screen using the design support system of this invention. It is a figure which shows the example of the design condition input screen using the design support system of this invention. It is a figure which shows the example of the design condition input screen using the design support system of this invention. It is a figure which shows the example of the design condition input screen using the design support system of this invention. It is a figure which shows the example of the design condition input screen using the design support system of this invention. It is a figure which shows the example of the design condition input screen using the design support system of this invention. It is a figure which shows the example of the design condition input screen using the design support system of this invention. It is a figure which shows the example of the design document calculated by the design support system of this invention, and being displayed on a display. It is the figure which showed the wiring pattern in the case of constructing a trunk line with respect to three dwelling units, and the number of wiring patterns according to the number of dwelling units. It is a figure which shows the trunk line and branch line diameter which are generally used in the AC power distribution network. It is a cost comparison figure by the difference in the trunk line and branch line diameter combination at the time of constructing in a 10-story building by one trunk line. It is a figure which shows the cable article expense and construction cost according to wire diameter per meter. It is a design flowchart of the power trunk line in the conventional apartment house.

Explanation of symbols

1 ... Power trunk line design support program 2 ... MPU
3 ... Storage unit 3-1 ... Cable database 3-2 ... Integration database 3-3 ... Safety condition 3-4 ... Saved data X
3-5 ... Saved data Y
3-6 ... Saved data Z
4 ... input interface 5 ... output interface 6 ... keyboard 7 ... mouse 8 ... display 9 ... printer 10 ... storage device 11 ... design design document for housing complex by design designer 12 ... PC

Claims (7)

A plurality of wiring patterns are generated based on the saved data and the input data, wiring design and cost calculation are performed for a plurality of combinations of the wiring diameter and the wiring pattern, and the wiring pattern and wiring line that are the minimum cost based on the result of the wiring design An electric power trunk line design support program for an apartment house, which has a function of searching for a diameter and storing and / or displaying a wiring pattern, a wiring diameter, and a cost that are the minimum cost. The power trunk line design support program for an apartment house according to claim 1, wherein the wiring design and the cost calculation are performed for all combinations of the wiring wire diameter and the wiring pattern. The stored data consists of cable data consisting of the wire diameter and allowable current of wiring, integrated data consisting of article and construction costs related to power wiring, and safety condition data consisting of technical standards and regulations related to power trunk line design. 3. The set according to claim 1, wherein the input data includes housing structure data relating to a housing structure, wiring data relating to wiring conditions, and electrical data relating to power distribution conditions. Residential power trunk line design support program. A power trunk line design method for designing a power trunk line of an apartment house using the power trunk line design support program according to any one of claims 1 to 3. A recording medium storing the power trunk line design support program according to any one of claims 1 to 3. The power main line design support program according to any one of claims 1 to 3, an input device for inputting the input data, a display device, a storage device for storing the stored data, and the power main line design support. Power trunk line design support system consisting of a computing device that executes a program. The power trunk line design support system according to claim 6, wherein a GUI that allows a designer to input the input data in an interactive manner is displayed on the display device during execution of the power trunk line design support program. .

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