Electrical Equipment Systems

Abstract

The electrical equipment unit (10) includes a container group (200) in which a plurality of electrical devices (50) are housed in separate containers (20), a transformer (31) arranged at one longitudinal end of each container (20), a load (32) arranged at the other longitudinal end of each container (20), and a stand (30) capable of housing each container (20) on either the upper or lower level. The transformer (31) is configured to supply power to the load (32) via the plurality of electrical devices (50) connected in parallel. The container group (200) includes a plurality of lower containers (21, 22) arranged in two checkerboard rows on the lower level of the stand (30), and a plurality of upper containers (23, 24) arranged in two checkerboard rows on the upper level of the stand (30) so as not to overlap with the plurality of lower containers (21, 22). The electrical equipment unit (10) further includes a platform (40) for accessing the doors (91, 92) provided on the sides of the upper containers (23, 24).

Description

[Technical Field]

[0001] The present disclosure relates to an electrical equipment system comprising a plurality of electrical equipment units. [Background technology]

[0002] Patent Document 1 discloses a power supply device equipped with an inverter board. Specifically, the power supply device includes an inverter board disposed in a transportable container. Furthermore, the power supply device includes a transformer connected to the inverter board disposed in another container. The container including the inverter board is disposed above the container including the transformer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent No. 4455428 Summary of the Invention [Problem to be solved by the invention]

[0004] Consider a case where periodic inspections are performed on electrical equipment stored in containers. In this case, if the containers are stacked as disclosed in Patent Document 1, scaffolding is required for workers to access the upper containers. In the case of a large-scale electrical equipment system, if scaffolding is provided for each of the stacked containers, workers will have to climb up and down to access the spaces between the upper containers. In this case, there is a risk that the time required for maintenance of the electrical equipment stored in the containers will be longer.

[0005] One object of the present disclosure is to provide an electrical equipment system that allows workers to efficiently perform maintenance on electrical devices housed in multiple containers. [Means for solving the problem]

[0006] One aspect of the present disclosure relates to an electrical equipment including a plurality of electrical equipment units. The electrical equipment unit includes a group of containers, each containing a plurality of electrical devices in a separate container; a transformer disposed at one longitudinal end of each container; a load disposed at the other longitudinal end of each container; and a rack unit capable of storing each container on an upper or lower level. The transformer is configured to supply power to the load via the plurality of electrical devices connected in parallel. The group of containers includes a plurality of lower containers arranged in two rows in a checkerboard pattern on the lower level of the rack unit, and a plurality of upper containers arranged in two rows in a checkerboard pattern on the upper level of the rack unit so as not to overlap with the plurality of lower containers. The electrical equipment unit further includes a scaffold unit for accessing doors provided on the sides of the plurality of upper containers. [Effects of the Invention]

[0007] According to the present disclosure, the container group includes a plurality of lower containers arranged in two checkerboard rows on the lower level of the pedestal, and a plurality of upper containers arranged in two checkerboard rows on the upper level of the pedestal so as not to overlap with the plurality of lower containers. The electrical equipment unit is also provided with a scaffolding unit for accessing doors provided on the sides of the plurality of upper containers. This allows workers to move between the plurality of upper containers without having to climb or descend. This allows for efficient maintenance of electrical equipment stored in the plurality of containers (container group). [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram for explaining an overview of an electrical equipment system. [Figure 2] FIG. 1 is a diagram for explaining an overview of an electrical equipment system. [Figure 3] FIG. 2 is a diagram for explaining a specific example of an electrical equipment unit. [Figure 4] 10A and 10B are diagrams for explaining specific examples of a container and a platform part. [Figure 5] 10A and 10B are diagrams for explaining specific examples of a container and a platform part. [Figure 6] 10A and 10B are diagrams for explaining specific examples of a platform section and a scaffolding section. [Figure 7] FIG. 2 is a block diagram showing a configuration example of an electrical equipment unit. [Figure 8] 10A and 10B are diagrams illustrating an example of wiring of conductors related to an electrical equipment unit. [Figure 9] FIG. 10 is a diagram for explaining an overview of an electrical equipment system according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] An electrical equipment system according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. Elements common to the various drawings will be designated by the same reference numerals, and redundant description will be omitted.

[0010] 1. Overview of the electrical equipment system FIG. 1 is a diagram for explaining an overview of an electrical equipment system 1. FIG. 1 shows a perspective view of the electrical equipment system 1. The electrical equipment system 1 includes a plurality of electrical equipment units 10 (also simply referred to as electrical equipment units 10). The plurality of electrical equipment units 10 are installed outdoors. For example, the plurality of electrical equipment units 10 are arranged adjacent to each other in the longitudinal direction. In the example shown in FIG. 1, the electrical equipment system 1 includes ten electrical equipment units 10 (10A, 10B, 10C, 10D, . . . , 10J) arranged adjacent to each other in the longitudinal direction. Examples of the electrical equipment system 1 include a rectifier for electrolysis, a power receiving equipment for supplying power to a load such as a factory, a power conditioner for solar panels, a power converter for charging a storage battery, and a power receiving equipment for a pump facility. Details of the electrical equipment units 10 will be described later. In the example shown in FIG. 1, the direction from electrical equipment unit 10A to electrical equipment unit 10B is the Y direction, the direction horizontally perpendicular to the Y direction and toward the right on the page is the X direction, and the upward direction perpendicular to the XY plane is the Z direction.

[0011] Fig. 2 is a diagram for explaining an overview of the electrical equipment system 1. Fig. 2 shows a wiring diagram of the electrical equipment system 1. Three-phase AC power supplied from a three-phase AC power system 3 passes through an electric circuit 80 and a plurality of circuit breakers 4 (4A, 4B, 4C, 4D, ..., 4J), and is supplied to a plurality of electrical equipment units 10 (10A, 10B, 10C, 10D, ..., 10J) by each electric circuit 81 (81A, 81B, 81C, 81D, ..., 81J).

[0012] Each electrical equipment unit 10 is composed of a three-phase transformer 31, multiple electrical devices 50, and a load 32. The transformer 31 is a five-winding transformer with one winding on the primary side and four windings on the secondary side. The multiple electrical devices 50 include four electrical devices: a first electrical device 501, a second electrical device 502, a third electrical device 503, and a fourth electrical device 504. The first electrical device 501, the second electrical device 502, the third electrical device 503, and the fourth electrical device 504 are collectively referred to as electrical devices 50.

[0013] The transformer 31 has a primary side connected to the electric circuit 81, a first winding of the secondary output connected to the input side of the first electrical device 501 via a conductor 71, a second winding of the secondary output connected to the input side of the second electrical device 502 via a conductor 72, a third winding of the secondary output connected to the input side of the third electrical device 503 via a conductor 73, and a fourth winding of the secondary output connected to the input side of the fourth electrical device 504 via a conductor 74.

[0014] The positive output terminals of the four electric devices 50 are connected in parallel and connected to the load 32 via a conductor 75. The negative output terminals of the four electric devices 50 are connected in parallel and connected to the load 32 via a conductor 76. The conductors 71, 72, 73, and 74 are collectively referred to as conductors 70. The first electric device 501 is housed in a first lower container 21 (described later), the second electric device 502 is housed in a second lower container 22 (described later), the third electric device 503 is housed in a first upper container 23 (described later), the fourth electric device 504 is housed in a second upper container 24 (described later), and the load 32 is housed in a container 25. The first lower container 21, the second lower container 22, the first upper container 23, and the second upper container 24 are collectively referred to as a container group 200. The power system 3 and the circuit breaker 4 shown in FIG. 2 are not shown in FIG. 1.

[0015] 2.Specific examples of electrical equipment units FIG. 3 is a diagram illustrating a specific example of the electrical equipment unit 10. FIG. 3(A) shows a perspective view of one electrical equipment unit 10, and FIG. 3(B) shows a top view of one electrical equipment unit 10. The electrical equipment unit 10 includes a container group 200 consisting of a plurality of containers, a rack unit 30, a transformer 31, a load 32, and a scaffolding unit 40. In the example shown in FIG. 3, the container group 200 is made up of four containers: a first lower container 21, a second lower container 22, a first upper container 23, and a second upper container 24. The first lower container 21, the second lower container 22, the first upper container 23, and the second upper container 24 may each be simply referred to as a container 20. In Fig. 3(A), the direction from the transformer 31 to the container group 200 is the X direction, the direction that is horizontally orthogonal to the X direction and is upward on the paper is the Y direction, and the upward direction that is orthogonal to the XY plane is the Z direction. In Fig. 3(B), the direction to the right on the paper is the X direction, the direction that is horizontally orthogonal to the X direction and is upward on the paper is the Y direction, and the direction that is orthogonal to the front of the paper that is parallel to the XY plane is the Z direction (upward direction).

[0016] The container 20 is a transportable container. The container 20 may be of various sizes. For example, the container 20 may be a container of a size conforming to ISO standards. The container 20 may also be equipped with an air conditioner for adjusting the temperature and humidity of the air inside. In this case, an outdoor unit for the air conditioner is attached to the outer surface of the container 20.

[0017] It is desirable that the sizes of the multiple containers 20 constituting the container group 200 be uniform. FIGS. 4 and 5 are diagrams illustrating specific examples of the containers 20 and the rack unit 30. As shown in FIG. 4(A), each container 20 is rectangular and has a first long side 201 and a second long side 202 parallel to the XZ plane. The second long side 202 is located in the Y direction from the first long side 201. Each container 20 has a first short side 203 and a second short side 204 parallel to the YZ plane. The second short side 204 is located in the X direction from the first short side 203. Each container 20 has a floor 205 and a roof 206 parallel to the XY plane. The roof 206 is located in the Z direction from the floor 205. The X direction dimensions of the first long side 201 and the second long side 202 are longer than the Y direction dimensions of the first short side 203 and the second short side 204. Each container 20 is a hexahedron having a first long side 201, a second long side 202, a first short side 203, a second short side 204, a floor 205, and a roof 206. Like container 20, container 25 is also a hexahedron having a first long side 201, a second long side 202, a first short side 203, a second short side 204, a floor 205, and a roof 206.

[0018] The container group 200 is configured so that multiple pieces of electrical equipment 50 are housed in separate containers 20. By storing the electrical equipment 50 in the containers 20 in advance at a factory or the like and installing electrical wiring inside the containers 20 in advance, the containers 20 can be installed at the installation location at the delivery destination. In this case, the assembly work at the delivery destination is reduced, which leads to a shortened construction period and improved quality. The containers 25 house the loads 32. As with the containers 20, by storing the loads 32 in the containers 25 in advance at a factory or the like and installing electrical wiring inside the containers 25 in advance, the containers 25 can be installed at the installation location at the delivery destination.

[0019] As shown in FIG. 5 , the container 20 has a door 91 on a first long side surface 201, which is one end in the short direction, and a door 92 on a second long side surface 202, which is the other end in the short direction. The door 91 is, for example, a foldable double door, and is configured so that the wide opening allows the electrical equipment 50 to be carried inside. The door 91 is not limited to a foldable double door, but may be a plurality of double doors or a sliding door. The door 92 may be, for example, a door (e.g., a single-swing door) that allows workers to enter and exit the container 20. The door 91, which allows a wide opening, may be provided on the second long side surface 202, and the door 92 may be provided on the first long side surface 201. Doors, which allow a wide opening, may be provided on both the first long side surface 201 and the second long side surface 202. The door structure of container 25 may be the same as or different from the door structure of container 20.

[0020] The electric device 50 is, for example, a device that converts AC power into DC power. As shown in FIG. 3A, the electric device 50 may be composed of, for example, a power converter 51 and a chopper device 52. The power converter 51 is, for example, a device that converts AC power output from a transformer 31 into DC power. Examples of the power converter 51 include a separately excited rectifier such as a thyristor rectifier, a self-excited converter, and the like. The chopper device 52 is a device that generates power of a voltage required to drive the load 32 by chopping the DC power generated by the power converter 51. The DC power generated by the power converter 51 is input to the chopper device 52, and the output of the chopper device 52 is supplied to the load 32 via conductors 75 and 76 as the output of the electric device 50 (see FIG. 2). As another example, the electric device 50 may include control devices for the power converter 51 and the chopper device 52, and a container air conditioner. Furthermore, the electric device 50 may omit the chopper device 52 and supply the output of the power conversion device 51 to the load 32 .

[0021] The platform 30 has a structure that allows each container 20 to be stored on the upper or lower level. The platform 30 may be, for example, rectangular and have a frame structure of the same size as the container 20. In this case, the platform 30 can be transported in the same manner as the container 20. The platform 30 may be composed of multiple platform sections. For example, as shown in FIG. 4(B), the platform 30 is composed of a first platform section 301 and a second platform section 302. The first platform section 301 and the second platform section 302 may have the same structure or different structures. The first platform section 301 has a first long side surface 3011 and a second long side surface 3012 that are parallel to the XZ plane. The second long side surface 3012 is located in the Y direction from the first long side surface 3011. The first platform section 301 has a first short side surface 3013 and a second short side surface 3014 that are parallel to the YZ plane. The second short side surface 3014 is located in the X direction from the first short side surface 3013. The first frame unit 301 has a floor surface 3015 and a roof surface 3016 that are parallel to the XY plane. The roof surface 3016 is located in the Z direction from the floor surface 3015. The dimensions of the first long side surface 3011 and the second long side surface 3012 in the X direction are longer than the dimensions of the first short side surface 3013 and the second short side surface 3014 in the Y direction. The first frame unit 301 is a hexahedron having the first long side surface 3011, the second long side surface 3012, the first short side surface 3013, the second short side surface 3014, the floor surface 3015, and the roof surface 3016. The first long side surface 3011, the second long side surface 3012, the first short side surface 3013, and the second short side surface 3014 of the first frame unit 301 each have an opening.

[0022] The second mounting unit 302 has the same structure as the first mounting unit 301, and is a hexahedron having a first long side surface 3021, a second long side surface 3022, a first short side surface 3023, a second short side surface 3024, a floor surface 3025, and a roof surface 3026. The first long side surface 3021, the second long side surface 3022, the first short side surface 3023, and the second short side surface 3024 of the second mounting unit 302 each have an opening.

[0023] The secondary side of the transformer 31 is connected from a first short side surface 203 at one end of each container 20 in the longitudinal direction to the input side of the electrical equipment 50 (power conversion device 51) housed in the container 20 via conductors 71, 72, 73, and 74 (see FIGS. 2 and 4 ). The transformer 31 transforms high-voltage AC power supplied from the power grid 3 into predetermined low-voltage AC power and supplies the transformed AC power to the electrical equipment 50 housed in the container 20. It is preferable that the secondary side terminal of the transformer 31 be arranged to face the container group 200. Generally, the voltage of the secondary side of the transformer 31 is lower than that of the primary side. By arranging the secondary side terminal of the transformer 31 to face the container group 200 in this way, the conductors 71, 72, 73, and 74 can be shortened, which can contribute to reducing losses in the facility.

[0024] The output of the container 20 is connected to a load 32 housed in a container 25 located in the X direction via a conductor 75 and a conductor 76 drawn out from the second short side surface 204. The outputs of the containers 20 constituting the container group 200 are connected in parallel (see FIGS. 2 and 4). Specifically, the input of the load 32 housed in the container 25 is connected to the output of the electrical equipment 50 (chopper device 52) housed in each container 20. Examples of the load 32 include devices that operate on a DC power source (e.g., an electrolytic cell, a storage battery, etc.), devices that are driven by an inverter when the chopper device 52 in the electrical equipment 50 is replaced with an inverter, and the like.

[0025] The scaffolding section 40 is provided on top of the multiple lower containers. The scaffolding section 40 is made up of members that serve as a scaffold for workers, enabling them to access the doors 91 and 92 provided on the sides of the upper containers. An example of the scaffolding section 40 is grating. Details of the scaffolding section 40 will be described later.

[0026] Consider an example of arrangement of multiple containers 20 on the stand 30. For example, as shown in FIG. 3(A), the multiple containers 20 include multiple lower containers arranged on approximately the same plane as the stand 30 and multiple upper containers arranged on the upper level of the stand 30. As shown in FIG. 3(B), the multiple lower containers are arranged in two checkerboard rows. As shown in FIG. 3(B), the multiple upper containers are also arranged in two checkerboard rows so as not to overlap with the multiple lower containers.

[0027] More specifically, the plurality of lower containers include a first lower container 21 and a second lower container 22. The frame unit 30 is composed of a first frame unit 301 and a second frame unit 302. The first frame unit 301 and the second frame unit 302 each have a long side and a short side in the XY plane. The long side and short side of the first frame unit 301 and the second frame unit 302 in the XY plane are equal to the long side and short side of the container 20 in the XY plane, respectively. As shown in FIG. 3(B), the first long side surface 201 of the first lower container 21 faces the second long side surface 3012 of the first frame unit 301, the second long side surface 202 of the second lower container 22 faces the first long side surface 3021 of the second frame unit 302, the second short side surface 204 of the first lower container 21 faces the first short side surface 3023 of the second frame unit 302, and the first short side surface 203 of the second lower container 22 faces the second short side surface 3014 of the first frame unit 301. In other words, the first lower container 21 is disposed in the upper left region of the drawing, and the second lower container 22 is disposed in the lower right region of the drawing. However, this is not a limitation. For example, the first lower container 21 may be disposed in the lower left region of the drawing, and the second lower container 22 may be disposed in the upper right region of the drawing.

[0028] The plurality of upper containers include a first upper container 23 and a second upper container 24. The position of the first upper container 23 in the XY plane substantially coincides with the upper part of the first frame unit 301. The second upper container 24 is arranged so that its position in the XY plane is the same as that of the second frame unit 30. 3(B), the first upper container 23 is placed in the lower left region so as not to overlap with the first lower container 21 in the same XY plane, and the second upper container 24 is placed in the upper right region so as not to overlap with the second lower container 22 in the same XY plane. Note that when the first lower container 21 is placed in the lower left region and the second lower container 22 is placed in the upper right region, the first upper container 23 is placed in the upper left region and the second upper container 24 is placed in the lower right region.

[0029] Consider the scaffolding section 40 of each container 20. The scaffolding section 40 includes a first scaffolding section 41, a second scaffolding section 42, and a third scaffolding section 43. The first scaffolding section 41 is installed on the top of the first lower container 21. The second scaffolding section 42 is installed on the top of the second lower container 22. The scaffolding section 40 may be provided with a safety fence or the like as needed. The first scaffolding section 41 is composed of members that serve as a scaffold when workers access the doors (doors 91 and 92) provided on the side of the first upper container 23. In other words, the first scaffolding section 41 is a space for performing maintenance on the electrical equipment 50 stored in the first upper container 23. Therefore, the height of the first scaffolding section 41 in the Z direction is lower than the lower end of the door provided on the first upper container 23 in the Z direction. Furthermore, the first scaffolding section 41 and the first upper container 23 may come into contact with each other, but if there is a gap in the Y direction, it is desirable to set the gap to a size that prevents workers from putting their feet in (preferably 3 cm or less).

[0030] The second scaffolding section 42 is composed of members that serve as a scaffolding when a worker accesses the doors (doors 91 and 92) provided on the side of the second upper container 24. In other words, the second scaffolding section 42 also provides a space for performing maintenance on the electrical equipment 50 stored in the second upper container 24. The height of the second scaffolding section 42 in the Z direction is lower than the lower end of the door provided on the second upper container 24 in the Z direction. Furthermore, the second scaffolding section 42 and the second upper container 24 may be in contact with each other or may be fixed to each other. However, if there is a gap in the Y direction, it is desirable to set the gap to a size that prevents a worker from inserting their feet (preferably 3 cm or less).

[0031] The third scaffolding section 43 is composed of members that serve as a scaffolding for workers to move between the first scaffolding section 41 and the second scaffolding section 42. This allows workers to move without climbing up and down when accessing the first upper container 23 and the second upper container 24. This allows efficient maintenance of the electrical equipment 50 stored in the upper containers.

[0032] The scaffolding unit 40 is installed on the upper level of the platform unit 30, and the platform unit 30 is connected to the container 20 provided below the platform unit 30 using a connecting part 60 (see FIG. 6). In the example shown in FIG. 6, the upper platform unit 30 on which the second scaffolding unit 42 and the third scaffolding unit 43 are installed is connected to the second lower container 22 provided below the platform unit 30 via the connecting part 60. The connecting part 60 is a clamp part used, for example, to stack, load, and secure containers on a container ship or the like, and can be connected to a container.

[0033] Note that with only one electrical equipment unit 10, a worker cannot access the door provided on the side of the first upper container 23 opposite the first scaffolding 41. Similarly, a worker cannot access the door provided on the side of the second upper container 24 opposite the second scaffolding 42. However, as shown in FIG. 1 , multiple electrical equipment units 10 of the same size are arranged at the same position in the X direction and adjacent to each other in the Y direction. The first scaffolding 41 of an electrical equipment unit 10 is arranged adjacent to the first upper container 23 of the electrical equipment unit 10 adjacent to it in the Y direction. The second scaffolding 42 of an electrical equipment unit 10 is arranged adjacent to the second upper container 24 of the electrical equipment unit 10 adjacent to it in the -Y direction. The height of the first scaffolding 41 in the Z direction is arranged lower than the lower end in the Z direction of the door provided on the first upper container 23 of the electrical equipment unit 10 adjacent to it in the Y direction. The second scaffolding section 42 is arranged so that its height in the Z direction is lower than the lower end in the Z direction of the door provided on the second upper container 24 of the electrical equipment unit 10 that is adjacent in the -Y direction. This allows workers to access the door provided on the side surface of the first upper container 23 opposite to the first scaffolding section 41 from the first scaffolding section 41 of the adjacent electrical equipment unit 10. In addition, workers can access the door provided on the side surface of the second upper container 24 opposite to the second scaffolding section 42 from the second scaffolding section 42 of the adjacent electrical equipment unit 10.

[0034] The first scaffolding section 41 and the second upper container 24 adjacent to it in the Y direction may be in contact with each other or may be fixed to each other. However, if there is a gap in the Y direction, it is desirable to set the gap large enough that a worker cannot insert his / her feet (preferably 3 cm or less) or to have a structure that allows temporary scaffolding to be installed to fill the gap during work. Furthermore, the second scaffolding section 42 and the first upper container 23 adjacent to it in the -Y direction may be adjacent to each other or may be fixed to each other. However, if there is a gap in the Y direction, it is desirable to set the gap large enough that a worker cannot insert his / her feet (preferably 3 cm or less) or to have a structure that allows temporary scaffolding to be installed to fill the gap during work.

[0035] The dimensions of the opening in the first long side surface 3011 of the first frame unit 301 are set to a size that does not interfere with the opening and closing of a door provided on the second long side surface 202 of the first lower container 21 adjacent in the -Y direction. The dimensions of the opening in the second long side surface 3012 of the first frame unit 301 are set to a size that does not interfere with the opening and closing of a door provided on the first long side surface 201 of the first lower container 21. The dimensions of the opening in the second long side surface 3022 of the second frame unit 302 are set to a size that does not interfere with the opening and closing of a door provided on the first long side surface 201 of the second lower container 22 adjacent in the Y direction. The dimensions of the opening in the first long side surface 3011 of the second frame unit 302 are set to a size that does not interfere with the opening and closing of a door provided on the second long side surface 202 of the first lower container 21. The first short side surface 3013 and the second short side surface 3014 of the first frame portion 301 are provided with openings through which the conductor 72 shown in Fig. 2 passes. The first short side surface 3023 and the second short side surface 3024 of the second frame portion 302 are provided with openings through which the conductors 75 and 76 shown in Fig. 2 pass. The first frame portion 301 and the second frame portion 302 can be formed by welding or other fastening methods using steel materials such as L-shaped steel, H-shaped steel, and square steel.

[0036] As described above, in the electrical equipment system 1, multiple containers 20 are arranged on the lower and upper levels of the stand unit 30. The multiple lower containers are arranged in two checkerboard rows, and the multiple upper containers are also arranged in two checkerboard rows so as not to overlap with the multiple lower containers. This allows the installation space for the electrical equipment system 1 to be reduced. Furthermore, in the electrical equipment system 1, a scaffolding unit 40 is provided above the multiple lower containers. This allows workers to move between the multiple upper containers without having to climb up and down. Therefore, maintenance of the multiple electrical devices 50 stored in the multiple containers 20 can be performed efficiently.

[0037] Furthermore, in the electrical equipment system 1, the multiple electrical equipment units 10 are arranged adjacent to each other in the longitudinal direction. This allows workers to access the upper containers arranged in the multiple electrical equipment units 10 without having to climb up and down. This improves the efficiency of maintenance of the electrical equipment 50 stored in the multiple containers 20.

[0038] 3. Electrical equipment unit configuration example 7 is a block diagram showing an example of the configuration of one electrical equipment unit 10. Three-phase AC power from the power system 3 is supplied to the electrical equipment unit 10 by an electrical circuit 81 via a circuit breaker 4 (high-voltage switchgear) through an electrical circuit 80. The three-phase AC power supplied to the electrical equipment unit 10 by the electrical circuit 81 is then supplied to an input terminal IN on the primary side of a transformer 31. This allows the high-voltage power supplied from the power system 3 to be transformed into AC power required to drive a load 32.

[0039] The three-phase AC input of the power converter 51 in the first lower container 21 is connected to a first output terminal OUT1, which is the output terminal of a first winding of the secondary output of the transformer 31, via a conductor 70 (conductor 71). The three-phase AC input of the power converter 51 in the second lower container 22 is connected to a second output terminal OUT2, which is the output terminal of a second winding of the secondary output of the transformer 31, via a conductor 70 (conductor 72). The three-phase AC input of the power converter 51 in the first upper container 23 is connected to a third output terminal OUT3, which is the output terminal of a third winding of the secondary output of the transformer 31, via a conductor 70 (conductor 73). The three-phase AC input of the power converter 51 in the second upper container 24 is connected to a fourth output terminal OUT4, which is the output terminal of a fourth winding of the secondary output of the transformer 31, via a conductor 70 (conductor 74). This allows the electrical equipment unit 10 to supply power transformed by the transformer 31 to each container 20.

[0040] The inlet for the conductor 70 of the container 20 is provided in the upper left or upper right part of the first short side surface 203, which is one end of the container 20 in the longitudinal direction. This prevents the doors 91 and 92 of the container 20 from interfering with the conductor 70 when the doors 91 and 92 are opened or closed. FIG. 8 is a diagram for explaining an example of wiring of the conductors (70, 75, 76) related to the electrical equipment unit 10. In the example shown in FIG. 8, the inlet for the conductor 70 of the container 20 is provided in the upper right part of the first short side surface 203, which is one end of the container 20 in the longitudinal direction.

[0041] The DC output of the power conversion device 51 is connected to the input of the chopper device 52, and the output of the chopper device 52 is connected to the load 32 outside the container 20 via the conductor 75 and the conductor 76. This makes it possible to supply DC power after chopper control to the load 32.

[0042] The conductor 75 connecting the chopper device 52 and the load 32 is a positive conductor. The conductor 76 connecting the chopper device 52 and the load 32 is a negative conductor. The outlets of the conductors 75 and 76 of the container 20 are provided in the upper left or upper right of the short side surface, which is the other end of the container 20 in the longitudinal direction. This prevents the doors 91 and 92 of the container 20 from interfering with the conductors 75 and 76 when the doors 91 and 92 are opened or closed. In the example shown in FIG. 8 , the outlets of the conductors 75 and 76 of the container 20 are provided in the upper left of the short side surface, which is the other end of the container 20 in the longitudinal direction. The conductors 70, 75, and 76 are, for example, rectangular copper strips or rectangular aluminum strips. The platform unit 30 and the scaffolding unit 40 may be provided with supports for the conductors 70, 75, and 76.

[0043] 8, the conductors 70, 75, and 76 are wired in a straight line. This shortens the wiring length of the conductors 70, 75, and 76, making it possible to reduce the resistance loss of each conductor. The conductor 71 extends from the first output terminal OUT1, is drawn into an upper portion of the first short side surface 203 of the first lower container 21 and in the vicinity of the first long side surface 201, and is connected to the electrical equipment 50 in the first lower container 21. The conductors 75 and 76, which are connected to the output side of the electrical equipment 50 in the first lower container 21, are drawn out from an upper portion of the second short side surface 204 of the first lower container 21 and in the vicinity of the first long side surface 201. The conductors 75 and 76 are drawn into an upper portion of the opening of the first short side surface 3023 of the second frame section 302 and in the vicinity of the first long side surface 3021. Furthermore, the conductor 75 and the conductor 76 are drawn out from above the opening of the second short side surface 3024 of the second frame portion 302 and in the vicinity of the first long side surface 3021 , and connected to the load 32 .

[0044] The conductor 72 extends from the second output terminal OUT2, is drawn into an area above the opening of the first short side surface 3013 of the first frame portion 301 and in the vicinity of the first long side surface 3011, and is drawn out from an area above the opening of the second short side surface 3014 of the first frame portion 301 and in the vicinity of the first long side surface 3011. The conductor 72 is also drawn into an area above the first short side surface 203 of the second lower container 22 and in the vicinity of the first long side surface 201, and is connected to the electrical equipment 50 in the second lower container 22. The conductors 75 and 76 connected to the output sides of the electrical equipment 50 in the second lower container 22 are drawn out from an area above the second short side surface 204 of the second lower container 22 and in the vicinity of the first long side surface 201, and are connected to the load 32.

[0045] The conductor 73 extends from the third output terminal OUT3, is pulled into an upper portion of the first short side surface 203 of the first upper container 23 and in the vicinity of the first long side surface 201, and is connected to the electrical equipment 50 inside the first upper container 23. The conductors 75 and 76 connected to the output side of the electrical equipment 50 inside the first upper container 23 are pulled out from an upper portion of the second short side surface 204 of the first upper container 23 and in the vicinity of the first long side surface 201, and are connected to the load 32 via the upper portion of the second scaffolding section 42 (in the Z direction).

[0046] The conductor 74 extends from the fourth output terminal OUT4, passes through the upper part (Z direction) of the first scaffolding section 41, is pulled into an upper part of the first short side surface 203 of the second upper container 24 and in the vicinity of the first long side surface 201, and is connected to the electrical equipment 50 inside the second upper container 24. The conductor 75 and the conductor 76 connected to the output side of the electrical equipment 50 inside the second upper container 24 are pulled out from an upper part of the second short side surface 204 of the second upper container 24 and in the vicinity of the first long side surface 201, and are connected to the load 32.

[0047] In this way, the conductor 72 passing through the first frame part 301 is positioned so as not to interfere with the opening and closing of the door provided on the first long side surface 201 of the first lower container 21 of the electrical equipment unit 10. Specifically, the conductor 72 is positioned on the -Y side of the turning radius when the door is opened or closed, or the lower end of the conductor 72 is positioned higher in the Z direction than the upper end of the door. Furthermore, the lower end of the conductor 72 is positioned higher in the Z direction than the upper end of the door provided on the second long side surface 202 of the first lower container 21 of another electrical equipment unit 10 adjacent in the -Y direction so as not to interfere with the opening and closing of the door.

[0048] The conductors 75 and 76 that pass through the second frame portion 302 are positioned so as not to interfere with the opening and closing of a door provided on the second long side surface 202 of the second lower container 22 of the electrical equipment unit 10. Specifically, the lower ends of the conductors 75 and 76 are positioned higher in the Z direction than the upper ends of the doors. Furthermore, in order not to interfere with the opening and closing of a door provided on the first long side surface 201 of the second lower container 22 of another electrical equipment unit 10 adjacent in the Y direction, the conductors 75 and 76 are positioned on the −Y direction side of the rotation radius when the door is opened or closed, or the lower ends of the conductors 75 and 76 are positioned higher in the Z direction than the upper ends of the doors.

[0049] The conductors 75 and 76, which are connected to the load 32 via the upper part (Z direction) of the second scaffolding 42, are positioned so as not to interfere with the opening and closing of a door provided on the first long side surface 201 of the second upper container 24 of the electrical equipment unit 10. Specifically, the conductors 75 and 76 are positioned on the -Y direction side of the turning radius when the door is opened or closed, or the lower ends of the conductors 75 and 76 are positioned higher in the Z direction than the upper end of the door. Furthermore, the lower ends of the conductors 75 and 76 are positioned higher in the Z direction than the upper end of the door so as not to interfere with the opening and closing of a door provided on the second long side surface 202 of the second upper container 24 of another electrical equipment unit 10 adjacent in the -Y direction.

[0050] The conductor 74, which enters the second upper container 24 via the upper part (Z direction) of the first scaffolding section 41, is positioned so as not to interfere with the opening and closing of a door provided on the second long side surface 202 of the first upper container 23 of the electrical equipment unit 10. Specifically, the lower end of the conductor 74 is positioned higher in the Z direction than the upper end of the door. Furthermore, the conductor 74 is positioned so as not to interfere with the opening and closing of a door provided on the first long side surface 201 of the first upper container 23 of another electrical equipment unit 10 adjacent in the Y direction. Specifically, the conductor 74 is positioned on the -Y direction side of the turning radius when the door is opened or closed, or the lower end of the conductor 74 is positioned higher in the Z direction than the upper end of the door.

[0051] 4.Effects According to this embodiment, the electrical equipment unit 10 includes a container group 200 in which multiple pieces of electrical equipment 50 are housed in separate containers 20, a transformer 31 disposed at one longitudinal end of each container 20, a load 32 disposed at the other longitudinal end of each container 20, and a rack unit 30 capable of housing each container 20 on either the upper or lower level. The transformer 31 is configured to supply power to the load 32 via the multiple pieces of electrical equipment 50 connected in parallel. The container group 200 includes multiple lower containers arranged in two checkerboard rows on the lower level of the rack unit 30, and multiple upper containers arranged in two checkerboard rows on the upper level of the rack unit 30 so as not to overlap with the multiple lower containers. The electrical equipment unit 10 further includes a scaffolding unit 40 for accessing doors provided on the sides of the multiple upper containers. This allows workers to move between the multiple upper containers without having to climb or descend. Therefore, maintenance of the electrical equipment 50 housed in the plurality of containers 20 (container group 200) can be carried out efficiently.

[0052] 5. Other embodiments FIG. 9 is a diagram illustrating an overview of an electrical equipment system 1A according to another embodiment. In the above-described electrical equipment system 1, multiple electrical equipment units 10 are arranged adjacent to each other in the longitudinal direction. In this case, there are locations of the electrical equipment units 10 arranged at both ends where there is no foothold for workers to access the doors on the side of the upper containers. For example, as shown in FIG. 9 , there is no adjacent electrical equipment unit 10 on the side of the door 91 on the side of the first upper container 23 of the electrical equipment unit 10A, and therefore no foothold for workers to access the door 91 of the first upper container 23. Furthermore, there is no adjacent electrical equipment unit 10 on the side of the door 92 on the side of the second upper container 24 of the electrical equipment unit 10J, and therefore no foothold for workers to access the door 92 of the second upper container 24. In this way, workers cannot access some of the doors on the side of the upper containers of the electrical equipment units 10 arranged at both ends.

[0053] According to the electrical equipment system 1A, in the electrical equipment units 10 arranged at both ends, a separate scaffolding section 100 is provided for accessing the door of the upper container on the side where there is no adjacent electrical equipment unit 10. The separate scaffolding section 100 includes a separate first scaffolding section 101 and a separate second scaffolding section 102. The separate first scaffolding section 101 is configured with members that serve as a scaffold for accessing the door of the container 20 on the side where there is no adjacent electrical equipment unit 10, in one of the electrical equipment units 10 at both ends. For example, the separate first scaffolding section 101 is configured with members having a frame structure of the same size as the container 20. In the example shown in FIG. 9 , the separate first scaffolding section 101 is provided as a scaffold for accessing the door 91 of the first upper container 23 in the electrical equipment unit 10A. The height of the floor surface of the separate first scaffolding section 101 in the Z direction is lower than the lower end of the door 91 of the first upper container 23 of the electrical equipment unit 10A.

[0054] The other second scaffolding section 102 is configured with members that serve as a scaffold for accessing the door of the container 20 on the other of the electric equipment units 10 at both ends, on the side where no adjacent electric equipment unit 10 exists. For example, the other second scaffolding section 102 is configured with members having a frame structure of the same size as the container 20. In the example shown in FIG. 9 , the other second scaffolding section 102 is provided as a scaffold for accessing the door 92 of the second upper container 24 in the electric equipment unit 10J. The height of the floor surface of the other second scaffolding section 102 in the Z direction is lower than the lower end of the door 92 of the second upper container 24 of the electric equipment unit 10J.

[0055] In this way, by providing separate scaffolding sections 100 for the electrical equipment units 10 at both ends, workers can perform maintenance on the electrical equipment 50 stored in the containers 20 provided in the electrical equipment units 10 at both ends. [Explanation of symbols]

[0056] 1, 1A...electrical equipment system, 3...power system, 4...circuit breaker, 10, 10A, 10B, 10C, 10D, 10J...electrical equipment unit, 20...container, 21...first lower container, 22...second lower container, 23...first upper container, 24...second upper container, 30...frame section, 31...transformer, 32...load, 40...scaffolding section, 41...first scaffolding section, 42...second scaffolding section, 43...third scaffolding section, 50...electrical equipment, 51...power conversion device, 52...chopper device, 60...connecting part, 70, 71, 72, 73, 74...conductors, 75...conductors, 76...conductors, 91...door, 92...door, 100...another scaffolding section, 101...another first scaffolding section, 102...another second scaffolding section, 301...first frame section, 302...second frame section

Claims

1. An electrical equipment system comprising a plurality of electrical equipment units, The electrical equipment unit is A group of containers each containing multiple pieces of electrical equipment in separate containers; a transformer disposed at one end of each container in the longitudinal direction; a load disposed at the other longitudinal end of each container; a platform unit capable of storing each container on the upper or lower level; and the transformer is configured to supply power to the load via the plurality of electrical devices connected in parallel; The container group includes: A plurality of lower containers arranged in two rows in a checkerboard pattern on the lower level of the stand unit; a plurality of upper containers arranged in two rows in a checkerboard pattern on the upper level of the stand so as not to overlap with the plurality of lower containers; Including, The electrical equipment unit further comprises: A platform for accessing doors provided on the sides of the upper containers is provided. An electrical equipment system characterized by:

2. 2. The electrical equipment system according to claim 1, The scaffolding is provided above the plurality of lower containers. An electrical equipment system characterized by:

3. 3. The electrical equipment system according to claim 1 or 2, The plurality of electrical equipment units are arranged adjacent to each other in the longitudinal direction, The electrical equipment system further comprises: For the electrical equipment units located at both ends, a separate scaffold is provided for accessing the door provided on the side of the upper container on the side where there is no adjacent electrical equipment unit. An electrical equipment system characterized by:

4. 2. The electrical equipment system according to claim 1, The electrical equipment includes a power conversion device that converts the transformed AC power output from the transformer into DC power. An electrical equipment system characterized by:

5. 5. The electrical equipment system according to claim 4, The electric device further includes a chopper device that performs chopper control to generate electric power of a voltage required to drive the load based on the DC power. An electrical equipment system characterized by:

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