Device selection system for high-voltage power receiving equipment

Abstract

To provide a device selection system for high-voltage power receiving equipment that can automatically select an appropriate internal device according to a transformer capacity.SOLUTION: A system of the present invention comprises storage means 32, calculation means 31, and output means 50. The storage means includes a housing database 33, a transformer database 34, and an internal device database 35. Each database contains weight data. The calculation means includes internal device selection means 41, housing selection means 38, and weight calculation means 43. The output means 50 displays or outputs any one of an outline drawing, a wiring diagram, and a layout diagram of the high-voltage power receiving equipment selected by the calculation means. The weight calculation means 43 calculates the weight of the selected high-voltage power receiving equipment.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] A cubicle is an abbreviation of a cubicle-type high-voltage power receiving facility, which is equipped with high-voltage power receiving equipment inside a metal housing. Since transformers and other internal equipment with determined mounting positions and the like can be stored as standard products inside the housing, there is an advantage that assembly in the factory and rearrangement of internal equipment according to customer requirements are easy.

[0002] High-voltage power receiving equipment is used as power receiving equipment in factories, buildings, etc. However, the capacities of lighting transformers and power transformers required for each factory and building are different, and the volume of the transformer also varies according to the transformer capacity. Therefore, in order to be able to immediately change the housing according to the change of the transformer at the design stage, a selection system has been developed that can simultaneously select the optimal housing by selecting a lighting transformer and a power transformer, and has been proposed as Patent Document 1.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in addition to these transformers inside the housing of the high-voltage power receiving equipment, various internal equipment such as a main circuit breaker provided on the primary side of the transformer, a secondary switch provided on the secondary side of the transformer, and a synchronous condenser for power factor correction are provided, and moreover, these internal equipment also need to be changed according to the capacity of the transformer. In the selection system of Patent Document 1, the designer has to individually select the internal equipment corresponding to the capacity of the transformer, and there is a possibility that inappropriate internal equipment may be selected.

[0005] Accordingly, an object of the present invention is to provide a device selection system for high-voltage power receiving equipment that can automatically select appropriate internal devices according to the transformer capacity of the high-voltage power receiving equipment.

Means for Solving the Problems

[0006] The invention according to claim 1 made to solve the above problems is a device selection system for high-voltage power receiving equipment in which a transformer and internal devices that need to be changed according to the capacity of the transformer are mounted in a housing, comprising: input means for inputting the type of the transformer; storage means; arithmetic means; and output means, wherein the storage means includes a housing database, a transformer database, and an internal device database, each database including weight data, the arithmetic means includes internal device selection means for automatically selecting, by calculation from the internal device database, the internal devices required for the transformer and the capacity of this internal device according to the capacity of the transformer, housing selection means for selecting from the housing database a housing capable of mounting the transformer and the internal devices, and weight arithmetic means, the output means is for displaying or outputting any one of the external view, wiring diagram, and layout diagram of the high-voltage power receiving equipment selected by the arithmetic means, and the weight arithmetic means is for calculating the weight of the selected high-voltage power receiving equipment. The invention according to claim 2, which is made to solve the above problems, is a device selection system for high-voltage power receiving equipment in which a transformer and internal equipment that needs to be changed according to the capacity of the transformer are mounted on a housing, and includes a storage means, a calculation means, and an output means. The storage means includes a housing database, a transformer database, and an internal equipment database, and each database includes weight data. The calculation means includes a transformer selection means for selecting a transformer to be mounted on the housing from the transformer database, an internal equipment selection means for automatically selecting by calculation from the internal equipment database the internal equipment required for the selected transformer and the capacity of this internal equipment according to the capacity of the transformer, a housing selection means for selecting from the housing database a housing capable of mounting the selected transformer and internal equipment, and a weight calculation means. The output means is for displaying or outputting any one of the external view drawing, wiring diagram, and layout diagram of the high-voltage power receiving equipment selected by the calculation means, and the weight calculation means is for calculating the weight of the selected high-voltage power receiving equipment, and is characterized by this.

[0007] Preferably, the internal equipment selection means selects the internal equipment classified for each transformer and stored in the internal equipment database, or selects by calculation from the internal equipment database the internal equipment required for the selected transformer.

[0008] Preferably, the calculation means includes a device change means for changing the automatically selected internal equipment. Further, preferably, the housing database includes a combination database showing the relationship between the combination of mountable lighting transformers and power transformers and the housing type.

Advantages of the Invention

[0009] By using the device selection system for high-voltage power receiving equipment of the present invention, internal equipment corresponding to the capacity of the transformer can be automatically selected, so that design mistakes in high-voltage power receiving equipment can be eliminated.

Brief Description of the Drawings

[0010]

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Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described. FIG. 1 is a cross-sectional view schematically showing the structure of a high-voltage power receiving facility, 10 is a metal housing, 11 is a lighting transformer, 12 is a power transformer, 13 is a main circuit breaker, 14 is a synchronous condenser, 15 is a secondary switch, and 16 is a ventilation fan.

[0012] The high-voltage power receiving facility steps down the 6.6 kV high-voltage power drawn in through the main circuit breaker 13 by the lighting transformer 11 and the power transformer 12, and supplies power to the load through the secondary switch 15 connected to the secondary side of the transformer.

[0013] When the load is an electric power load such as an induction motor, a phase lag of the current with respect to the voltage occurs when operating the induction motor, resulting in a decrease in the power factor and an increase in voltage drop and power loss. The leading power factor capacitor 14 is inserted into the circuit to improve this phase lag, and the power factor to be improved varies according to the capacitance of the capacitor. However, if the capacitance of the leading power factor capacitor 14 is increased too much, the phase advances too much and the power factor also decreases. Therefore, a leading power factor capacitor 14 with an appropriate capacitance must be selected according to the capacity of the transformer and the load.

[0014] The main circuit breaker 13 is a device that automatically shuts off the circuit when an overcurrent or short-circuit current occurs in the circuit. Also, when there is a short-circuit accident on the load side, it is shut off to avoid affecting other loads. When the transformer capacity is 300 kVA or less, an LBS (high-voltage switch) is used, and when it exceeds 300 kVA, a VCB (vacuum circuit breaker) is used.

[0015] The secondary switch 15 shuts off the overcurrent flowing on the secondary side of the transformer. Its capacity also needs to be set according to the capacity of the transformer.

[0016] The ventilation fan 16 is a facility that suppresses the rise in the internal temperature of the housing 10 due to the heat generation of the lighting transformer 11, the power transformer 12, or other internal devices. Since the amount of heat generation increases as the capacity of the transformer increases, it is necessary to use a ventilation fan with a large air volume or install a plurality of ventilation fans. Thus, internal devices other than the transformer need to be selected according to the capacity of the transformer.

[0017] Fig. 2 shows an example of the equipment selection system for high-voltage power receiving facilities of the present invention. As shown in the figure, in the example of Fig. 2, a plurality of terminals 20 are connected to a server 30 via a communication line such as the Internet. The terminal 20 is operated by a customer or an operator, and includes a display means 21 such as a display, and an input means 22 such as a keyboard and a mouse. The server 30 includes an arithmetic means 31 such as a CPU, and a storage means 32 such as a hard disk. However, these device configurations are not essential requirements of the present invention, and known devices may be appropriately selected and used. In addition, an embodiment in which the system of the present invention is installed in the server 30 will be described below. However, it is not always necessary to connect the terminal 20 and the server 30 via a communication line, and it is also possible to install the system of the present invention in a terminal computer.

[0018] In the storage means 32 of the server 30, a housing database 33, a transformer database 34, an internal equipment database 35, etc. are registered. In the housing database 33, a large number of housings are registered with items such as housing model number, housing type, housing size, housing weight, and price. As shown in Fig. 3, the housing database 33 also includes a combination database 36. This is a database showing the relationship between the combinations of the mountable lighting transformers 11 and power transformers 12 and the housing type.

[0019] In the combination database 36 of Fig. 3, the lighting transformers are classified into those without a primary side PC (primary cutout) and those with a primary side PC, and are further classified by capacity. The power transformers are also classified by capacity. From the capacities of the lighting transformer and the power transformer, the housing type for accommodating them is shown. For example, if the lighting transformer has no primary side PC and the transformer capacity is 10 kVA, and the transformer capacity of the power transformer is 50 kVA or less, the housing of type A may be selected. However, if the transformer capacity of the power transformer becomes 75 kVA, it can be seen that the housing of type B must be selected. Since the transformer size increases as the transformer capacity increases, the housing needs to be sequentially larger from type A to type F.

[0020] The transformer database 34 stores the transformer model number, type, size, weight, price, etc. Similarly, the internal equipment database 35 stores, for various internal equipment, the model number, type, size, price, weight, items corresponding to the internal equipment (such as air volume and power consumption in the case of the ventilation fan 16, and breaking capacity and rated operating voltage in the case of the secondary switch 15), etc. As internal equipment, as shown above, there are the main breaker 13 connected to the primary side of the transformer, the secondary switch 15 connected to the secondary side of the transformer, and the ventilation fan 16 for suppressing the temperature rise due to the heat generation of the transformer, all of which are changed according to the capacity of the transformer. The present invention is not limited to the above-described embodiment, and any internal equipment that is changed according to the capacity of the transformer may be used.

[0021] The arithmetic means 31 of the server 30 is provided with a housing selection means 38, a transformer selection means 40, and an internal equipment selection means 41. The housing selection means 38 is a means for selecting a housing from the housing database 33, and when a housing model number is input, it only reads the housing data of that model number. However, it is configured to be able to calculate and select a corresponding housing from the housing type and housing size. Also, after the selection of the transformer and internal equipment is performed, it is configured to be able to select a housing that can accommodate them.

[0022] The transformer selection means 40 is a means for selecting a transformer to be mounted on the housing 10 from the transformer database 34, and the selection is made with reference to the combination database 36 regarding the relationship between the housing and the transformer. The specific procedure will be described later.

[0023] The internal device selection means 41 has a function of automatically selecting an internal device corresponding to the transformer capacity selected by the transformer selection means 40 from the internal device database 35. The internal devices may be classified and registered in the internal device database 35 for each transformer, and when the transformer is determined, the internal devices suitable for that transformer may be automatically selected. Alternatively, the internal devices may be registered without being classified for each transformer, and the internal devices required for the selected transformer may be selected by calculation. Here, as a method of classifying and registering the internal devices in the internal device database 35 for each transformer and automatically selecting the internal devices suitable for that transformer when the transformer is determined, for example, when selecting the ventilation fan 16, the required maximum air volume is set to 〇 m 3 / min in the transformer database 34, and a ventilation fan whose maximum air volume in the internal device database 35 is 〇 m 3 / min or more is selected for approximation. On the other hand, as a method of registering the internal devices without classifying them for each transformer and selecting the internal devices required for the selected transformer by calculation, for example, when selecting the secondary switch 15, the secondary side current value is calculated from the capacity of the transformer using a calculation formula, and the quantity and capacity of the secondary switch corresponding to the secondary side current value derived by calculation from the internal device database 35 are calculated. Note that the method of selecting the internal devices can also be set to either a method of selecting from the database according to the internal device or a method of performing calculations.

[0024] However, there may be cases where it is desired to change the automatically selected internal device to another internal device due to some reason. Therefore, the calculation means 31 of the server 30 is provided with a device change means 42 that can change the automatically selected internal device. The device change means 42 allows the internal device selected by a pull-down operation to be changed. However, for internal devices that cannot be physically changed, such as those for which the capacity of the main breaker 13 does not correspond, it is preferable not to allow selection by a pull-down operation or to issue a warning. In addition to the pull-down operation, selection by a checkbox or selection and operation by displaying a device list may also be acceptable.

[0025] In addition, the arithmetic means 31 of the server 30 is provided with a weight arithmetic means 43. This is a means for calculating the total weight after the selection of the housing, transformer, and internal equipment is completed. For this purpose, weight data is registered in each database. Note that since the total weight of the high-voltage power receiving equipment includes wiring weight and fixture weight, the wiring weight and fixture weight are calculated and added according to the selected combination of housing, transformer, and internal equipment. The total weight of the high-voltage power receiving equipment is an item necessary for determining the installation location.

[0026] After all the selections are completed as described above, the output means 50 of the server 30 outputs the external view, wiring diagram, and layout diagram, and displays them on the display means 21 of the terminal 20. Also, the weight is displayed on this drawing. As a result, the designer can grasp the shape, size, and weight, and can confirm whether it can be installed at the planned installation location. After grasping whether it can be installed at the planned installation location, it is possible to carry out detailed design such as the arrangement of internal equipment such as the position of the door, the presence or absence of packing, the quantity and material of anchor bolts. Also, if the price is displayed at the same time, it can be compared with the budget amount.

[0027] Fig. 4 shows a flowchart of the equipment selection system for the high-voltage power receiving equipment of the present invention. First, in step 1, the housing model number is input. In the embodiment of Fig. 2, it is input from the input means 22 of the terminal 20. When the designer inputs the housing model number, the housing is selected from the housing database 33. Next, in step 2, when the capacity and type of the lighting transformer and power transformer to be mounted on the housing are input, the transformer selection means 40 selects the corresponding transformer from the transformer database 34. At this time, the arithmetic means 31 refers to the combination database 36 to determine whether the selected combination of housing and transformer is acceptable, and issues a warning if it is not acceptable. If the selected combination of housing and transformer is appropriate, the internal equipment selection means 41 automatically selects the internal equipment corresponding to the transformer capacity selected by the transformer selection means 40 from the internal equipment database 35.

[0028] On the one hand, if the designer does not know the housing model number or fails to enter the housing model number because the appropriate housing is unknown, the transformer capacity is entered in step 6, and the transformer selection means 40 selects the corresponding transformer from the transformer database 34. Next, in step 7, the internal device selection means 41 automatically selects an internal device corresponding to the transformer capacity selected by the transformer selection means 40 from the internal device database 35. Next, the housing selection means 38 automatically selects a housing suitable for housing the selected transformer and internal devices from the housing database 33. Also in this case, the combination database 36 is referred to.

[0029] After the housing, transformer, and internal devices are selected in this way, if necessary, the internal devices are changed in step 4, and if a change in the housing is required accordingly, an appropriate housing is automatically selected in step 5. Thereafter, the output means 50 outputs the drawing, and the shape and weight of the high-voltage power receiving equipment are displayed on the terminal 20.

[0030] Next, an example of a specific input screen will be described. FIG. 5 shows a state in which the housing model number and the capacities of the lighting transformer and the power transformer are entered on the input screen. Based on these inputs, the internal device selection means automatically selects and displays internal devices such as a shunt capacitor, a main breaker, a lighting transformer switch, a power transformer switch, and a ventilation fan. If this content is acceptable, click the OK button to complete the design.

[0031] FIG. 6 shows a state in which the housing model number is not entered. In this state, the capacities of the lighting transformer and the power transformer can be freely selected by pull-down input. FIG. 7 shows a state in which the capacities of the lighting transformer and the power transformer are selected. When the transformer capacity is selected in this way, automatic selection of the internal devices is performed and displayed as shown in FIG. 8. Thereafter, a housing capable of housing the selected transformer and internal devices is automatically selected and displayed as shown in FIG. 9. If this content is acceptable, click the OK button to complete the design.

[0032] Figure 10 shows the state immediately after the cabinet model number is input. When there is no input of the cabinet model number as shown in Figure 6, the selection of the transformer is free, but in Figure 10, the selection of the lighting transformer is restricted to 10 to 30 kVA. And when the lighting transformer is selected, as shown in Figure 11, the selection of the power transformer is restricted to 20 to 30 kVA. If there is dissatisfaction with this restriction, the cabinet model number can be input again, or after selecting the capacities of the lighting transformer and the power transformer without inputting the cabinet model number as shown in Figure 6, the cabinet can be automatically selected.

[0033] In any case, once the capacities of the lighting transformer and the power transformer are determined, the internal equipment is automatically selected, so that appropriate internal equipment corresponding to the transformer capacity can be automatically selected without being influenced by the skills of the designer.

Explanation of Signs

[0034] 10 Cabinet 11 Lighting transformer 12 Power transformer 13 Main circuit breaker 14 Phase advancing capacitor 15 Secondary switch 16 Ventilating fan 20 Terminal 21 Display means 22 Input means 30 Server 31 Arithmetic means 32 Storage means 33 Cabinet database 34 Transformer database 35 Internal equipment database 36 Combination database 38 Cabinet selection means 40 Transformer selection means 41 Internal equipment selection means 42 Equipment change means 43 Weight arithmetic means 50 Output means

Claims

**Claim 1** A device selection system for a high-voltage power receiving facility in which a housing is equipped with a transformer and internal devices that need to be changed according to the capacity of the transformer, comprising: input means for inputting the type of the transformer; storage means, calculation means, and output means; the storage means includes a housing database, a transformer database, and an internal device database, and each database includes weight data; the calculation means includes internal device selection means for automatically selecting, by calculation from the internal device database, the internal devices required for the transformer and the capacity of this internal device according to the capacity of the transformer; housing selection means for selecting, from the housing database, a housing capable of mounting the transformer and internal devices, and weight calculation means; the output means is for displaying or outputting any one of the external view, wiring diagram, and layout diagram of the high-voltage power receiving facility selected by the calculation means; A device selection system for a high-voltage power receiving facility, characterized in that the weight calculation means calculates the weight of the selected high-voltage power receiving facility. **Claim 2** A device selection system for a high-voltage power receiving facility in which a housing is equipped with a transformer and internal devices that need to be changed according to the capacity of the transformer, comprising: storage means, calculation means, and output means; the storage means includes a housing database, a transformer database, and an internal device database, and each database includes weight data; the calculation means includes transformer selection means for selecting, from the transformer database, the transformer to be mounted on the housing; internal device selection means for automatically selecting, by calculation from the internal device database, the internal devices required for the selected transformer and the capacity of this internal device according to the capacity of the transformer; housing selection means for selecting, from the housing database, a housing capable of mounting the selected transformer and internal devices, and weight calculation means; the output means is for displaying or outputting any one of the external view, wiring diagram, and layout diagram of the high-voltage power receiving facility selected by the calculation means; A device selection system for a high-voltage power receiving facility, characterized in that the weight calculation means calculates the weight of the selected high-voltage power receiving facility.

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