Equipment Selection System for High-Voltage Power Receiving Equipment

Abstract

To provide a selection system of a high voltage power-receiving facility capable of automatically selecting appropriate internal equipment according to transformer capacity.SOLUTION: The system includes storage means 32, calculation means 31 and output means 50. The storage means includes a frame database 33, a transformer database 34 and an internal equipment database 35. The databases include weight data respectively. The calculation means includes transformer selection means 40, frame selection means 38, internal equipment selection means 41 and weight calculation means 43. The output means 50 is configured to display one of an outline drawing, a connection diagram and a layout plan including a frame, a transformer and internal equipment selected by the calculation means. The weight calculation means 43 is configured to calculate a gross weight of the frame, the transformer and the internal equipment thus selected.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] A cubicle is an abbreviation for 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, a selection system has been developed and proposed as Patent Document 1, which can simultaneously select the optimal housing by selecting lighting transformers and power transformers so that the housing can be immediately changed according to the change of the transformer at the design stage.

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, various internal equipment such as a main disconnector 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 adjustment are provided inside the housing of the high-voltage power receiving equipment, 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 appropriate internal equipment may not 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 present invention 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, and includes a storage means, an arithmetic means, and an output means. The storage means includes a housing database, a transformer database, and an internal device database, and each database includes weight data. The arithmetic means includes a transformer selection means for selecting a transformer mounted in the housing from the transformer database, a housing selection means for selecting a housing capable of mounting the selected transformer and internal devices from the housing database, an 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, and a weight calculation means. The internal device includes a leading power factor capacitor for power factor adjustment, and the capacity of the leading power factor capacitor is selected according to the capacity of the transformer and the power factor that the leading power factor capacitor can improve. The output means displays an external view drawing, a wiring diagram, and an arrangement diagram including the housing, transformer, and internal devices selected by the arithmetic means. The weight calculation means calculates the total weight of the high-voltage power receiving equipment obtained by adding the wiring weight and the fixture weight.

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

[0008] Preferably, the arithmetic means includes a device change means for changing the automatically selected internal device. Also 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 equipment selection system for high-voltage power receiving facilities 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 facilities can be eliminated.

Brief Description of the Drawings

[0010]

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Modes for Carrying Out the Invention

[0011] Embodiments of the present invention will be described below. FIG. 1 is a cross-sectional view schematically showing the structure of high-voltage power receiving equipment. 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 equipment steps down the 6.6 kV high-voltage power introduced 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 the induction motor is operated, the power factor decreases, and the voltage drop and power loss increase. The synchronous condenser 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 condenser. However, if the capacitance of the synchronous condenser 14 is made too large, the phase advances too much and the power factor also decreases. Therefore, a synchronous condenser 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 a 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 through 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 generated by the lighting transformer 11, the power transformer 12, or other internal devices. Since the amount of heat generated increases as the capacity of the transformer increases, it is necessary to use a ventilation fan with a large air volume or to 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 necessarily required to connect the terminal 20 and the server 30 via a communication line, and the system of the present invention can also be installed in a terminal computer.

[0018] In the storage means 32 of the server 30, a housing database 33, a transformer database 34, an internal device 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, price, etc. Further, as shown in FIG. 3, the housing database 33 includes a combination database 36. This is a database showing the relationship between the combinations of mountable lighting transformers 11 and power transformers 12 and the housing type.

[0019] In the combination database 36 of FIG. 3, the electric lamp transformers are classified into those without a primary side PC (primary cutout) and those with a primary side PC, and further classified by capacity. Also, the power transformers are classified by capacity. And from the capacities of the electric lamp transformers and the power transformers, the cabinet types for housing them are shown. For example, if the electric lamp 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 type A cabinet can be selected. However, it can be seen that if the transformer capacity of the power transformer reaches 75 kVA, the type B cabinet must be selected. Since the transformer size increases as the transformer capacity increases, it is necessary to sequentially use larger cabinets from type A to type F.

[0020] In the transformer database 34, the transformer model number, type of transformer, transformer size, transformer weight, price, etc. are registered. Similarly, in the internal equipment database 35, for various internal equipment, the model number, type, size, price, weight, items corresponding to the internal equipment (such as the air volume and power consumption in the case of the ventilation fan 16, and the interrupting capacity and rated operating voltage in the case of the secondary switch 15), etc. are registered. As the internal equipment, as shown above, there are the main circuit 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 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 cabinet selection means 38, a transformer selection means 40, and an internal equipment selection means 41. The cabinet selection means 38 is a means for selecting a cabinet from the cabinet database 33, and when a cabinet model number is input, it only reads the cabinet data of that model number. However, it is configured to be able to calculate and select the corresponding cabinet from the cabinet type and cabinet size. Also, after the selection of the transformer and internal equipment is performed, it is configured to be able to select a cabinet that can house them.

[0022] The transformer selection means 40 is means for selecting a transformer 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 registered in the internal device database 35 by being classified for each transformer, and when the transformer is determined, an internal device 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 registering the internal devices in the internal device database 35 by being classified for each transformer and automatically selecting an internal device 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 being classified 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 switches 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 be a method of selecting from the database according to the internal devices or a method of performing calculations.

[0024] However, there may be a case where you want to change the internally selected device to another due to some reason. Therefore, the arithmetic 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 enables the change of the internally selected device by a pull-down operation. For internal devices that cannot be physically changed, such as those for which the capacity of the main circuit breaker 13 is not compatible, it is preferable not to make them selectable by the 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 and selecting a device list may also be used.

[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 devices 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 the wiring weight and fixture weight, the wiring weight and fixture weight are calculated and added according to the selected combination of the housing, transformer, and internal devices. 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 an external view drawing, a wiring diagram, and an arrangement 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 it is possible to grasp whether it can be installed at the planned installation location, it is possible to proceed with the detailed design of the internal device arrangement, such as the position of the door, the presence or absence of packing, the quantity and material of the 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 high-voltage power receiving equipment of the present invention. First, at 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, at step 2, when the capacities and types of the lighting transformer and the 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 calculation means 31 refers to the combination database 36 to determine whether the combination of the selected housing and transformer is acceptable, and issues a warning if it is not acceptable. If the combination of the selected 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 other hand, when the designer does not know the housing model number or does not input the housing model number because the appropriate housing is unknown, at step 6, the transformer capacity is input, and the transformer selection means 40 selects the corresponding transformer from the transformer database 34. Next, at step 7, 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. Next, the housing selection means 38 automatically selects a housing suitable for housing the selected transformer and internal equipment from the housing database 33. Also in this case, the combination database 36 is referred to.

[0029] After the housing, transformer, and internal equipment are selected in this way, if necessary, the internal equipment is changed at step 4, and if a change in the housing is required accordingly, an appropriate housing is automatically selected at 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. Figure 5 shows the state where the cabinet model number and the capacities of the lighting transformer and the power transformer are input on the input screen. Based on these inputs, the internal equipment selection means automatically selects and displays internal equipment such as a shunt capacitor, a main circuit breaker, a lighting transformer switch, a power transformer switch, and a ventilation fan. If this content is satisfactory, click the OK button to complete the design.

[0031] Figure 6 shows the state where there is no input of the cabinet model number. In this state, the capacities of the lighting transformer and the power transformer can be freely selected by pull-down input. Figure 7 shows the state where the capacities of the lighting transformer and the power transformer are selected. When the transformer capacities are selected in this way, automatic selection of the internal equipment is performed and displayed as shown in Figure 8. Then, a cabinet that can accommodate the selected transformer and internal equipment is automatically selected and displayed as shown in Figure 9. If this content is satisfactory, click the OK button to complete the design.

[0032] Figure 10 shows the state immediately after the cabinet model number is input. In the state where 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 - 30 kVA. And when the lighting transformer is selected, as shown in Figure 11, the selection of the power transformer is restricted to 20 - 30 kVA. If there is dissatisfaction with this restriction, either re-enter the cabinet model number or, without entering the cabinet model number as shown in Figure 6, select the capacities of the lighting transformer and the power transformer and then automatically select the cabinet.

[0033] In any case, once the capacities of the lighting transformer and the power transformer are determined, the internal equipment is automatically selected, so 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 Shunt Capacitor 15 Secondary switch 16 Ventilator 20 Terminal 21 Display means 22 Input means 30 Server 31 Arithmetic means 32 Memory means 33 Housing database 34 Transformer database 35 Internal equipment database 36 Combination database 38 Housing selection means 40 Transformer selection means 41 Internal equipment selection means 42 Equipment change means 43 Weight arithmetic means 50 Output means

Claims

1. An equipment selection system for high-voltage power receiving equipment that has a transformer and internal equipment that needs to be changed depending on the capacity of the transformer mounted in a housing, The apparatus 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, each of the databases including weight data; The calculation means includes a transformer selection means for selecting a transformer to be mounted in the housing from a transformer database; a housing selection means for selecting, from a housing database, a housing capable of mounting the selected transformer and internal devices; an internal device selection means for automatically selecting, by calculation from an internal device database, internal devices necessary for the selected transformer and the capacity of the internal devices corresponding to the capacity of the transformer; A weight calculation means is provided. the output means displays any one of an outline drawing, a wiring diagram, and a layout drawing including the housing, the transformer, and the internal devices selected by the calculation means, 13. An equipment selection system for high voltage power receiving equipment, wherein the weight calculation means calculates a total weight of the selected casing, transformer, and internal equipment.

2. 2. The equipment selection system for high voltage power receiving equipment according to claim 1, wherein the internal equipment selection means selects internal equipment classified by transformer and stored in the internal equipment database, or selects internal equipment required for the selected transformer by calculation from the internal equipment database.

3. 3. The equipment selection system for high voltage power receiving equipment according to claim 2, wherein the calculation means includes equipment changing means capable of changing the automatically selected internal equipment.

4. The equipment selection system for high voltage power receiving equipment as described in any one of claims 1 to 3, characterized in that the housing database includes a combination database showing the relationship between the combination of mountable lighting transformers and power transformers and the housing type.

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