Electrical equipment system

Abstract

An electrical equipment unit (10) includes a container group (200) at which a plurality of electrical apparatuses (50) are individually accommodated in respective containers (20), a transformer (31) that is provided on one end side in the longitudinal direction of the containers (20), a load (32) that is provided on the other end side in the longitudinal direction of the containers (20), and a frame (30) that can accommodate the containers (20) at an upper tier or a lower tier. The transformer (31) is configured to supply power to the load (32) via the plurality of electrical apparatuses (50), which are connected in parallel. The container group (200) includes a plurality of lower-tier containers (21, 22) that are provided in two rows in a checkered pattern at the lower tier of the frame (30) and a plurality of upper-tier containers (23, 24) that are provided in two rows in a checkered pattern at the upper tier of the frame (30) so as not to overlap the plurality of lower-tier containers (21, 22). The electrical equipment unit (10) also includes a scaffold (40) for accessing doors (91, 92) that are provided at side surfaces of the plurality of upper-tier containers (23, 24).

Description

Electrical equipment system

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

[0002] Patent Document 1 discloses a power supply device including an inverter panel. Specifically, in the power supply device, the inverter panel is arranged in a transportable container. Furthermore, the power supply device arranges a transformer connected to the inverter panel in another container. The container including the inverter panel is arranged on the container including the transformer.

[0003] Japanese Patent No. 4455428

[0004] Consider a case where periodic inspection is performed on electrical equipment housed in containers. In this case, if containers are stacked as disclosed in Patent Document 1, a scaffold is required for workers to access the upper container. In the case of a large-scale electrical equipment system, if a scaffold is provided for each of a plurality of stacked containers, workers need to go up and down when accessing between a plurality of upper containers. In this case, there is a risk that the time required for maintenance of the electrical equipment housed in the containers becomes long.

[0005] One object of the present disclosure is to provide an electrical equipment system that enables workers to efficiently perform maintenance on electrical equipment housed in a plurality of containers.

[0006] One aspect of the present disclosure relates to electrical equipment including a plurality of electrical equipment units. The electrical equipment unit includes a container group in which a plurality of pieces of electrical equipment are respectively housed in separate containers, a transformer arranged at one end side in the longitudinal direction of each container, a load arranged at the other end side in the longitudinal direction of each container, and a frame part capable of housing each container in an upper stage or a lower stage. The transformer is configured to supply power to the load via a plurality of electrically connected electrical devices connected in parallel. The container group includes a plurality of lower containers arranged in two rows in a checkered pattern at the lower stage of the frame part, and a plurality of upper containers arranged in two rows in a checkered pattern at the upper stage of the frame part so as not to overlap the plurality of lower containers. The electrical equipment unit further includes a scaffold part for accessing doors provided on side surfaces of the plurality of upper containers.

[0007] According to this disclosure, the container group includes multiple lower containers arranged in two rows in a checkerboard pattern on the lower level of the frame, and multiple upper containers arranged in two rows in a checkerboard pattern on the upper level of the frame so as not to overlap with the lower containers. The electrical equipment unit is also equipped with scaffolding 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 up or down. Therefore, maintenance of electrical equipment stored in multiple containers (container group) can be performed efficiently.

[0008] This is a diagram illustrating the overview of an electrical equipment system. This is a diagram illustrating the overview of an electrical equipment system. This is a diagram illustrating a specific example of an electrical equipment unit. This is a diagram illustrating a specific example of a container and a support structure. This is a diagram illustrating a specific example of a container and a support structure. This is a diagram illustrating a specific example of a support structure and a scaffolding structure. This is a block diagram illustrating an example of the configuration of an electrical equipment unit. This is a diagram illustrating an example of conductor wiring related to an electrical equipment unit. This is a diagram illustrating the overview of an electrical equipment system according to another embodiment.

[0009] An electrical equipment system according to an embodiment of this disclosure will be described with reference to the attached drawings. Furthermore, elements common to each drawing are denoted by the same reference numerals, and redundant explanations are omitted.

[0010] 1. Outline diagram 1 of the electrical equipment system is a diagram illustrating the outline of the electrical equipment system 1. Figure 1 shows a perspective view of the electrical equipment system 1. The electrical equipment system 1 comprises 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 Figure 1, the electrical equipment system 1 consists of 10 electrical equipment units 10 (10A, 10B, 10C, 10D, ..., 10J) arranged adjacent to each other in the longitudinal direction. Examples of electrical equipment system 1 include a rectifier for electrolysis, power receiving equipment for supplying power to loads such as factories, a power conditioner for solar panels, a power converter for battery charging, power receiving equipment for pump equipment, etc. Details of the electrical equipment units 10 will be described later. In the example shown in Figure 1, the direction from electrical equipment unit 10A to electrical equipment unit 10B is defined as the Y direction, the direction perpendicular to the Y direction and to the right of the paper is defined as the X direction, and the upward direction perpendicular to the X-Y plane is defined as the Z direction.

[0011] Figure 2 is a diagram illustrating the overview of the electrical equipment system 1. Figure 2 shows the wiring diagram of the electrical equipment system 1. Three-phase AC power supplied from the three-phase AC power system 3 is supplied to multiple electrical equipment units 10 (10A, 10B, 10C, 10D, ..., 10J) via each circuit 81 (81A, 81B, 81C, 81D, ..., 81J) through the circuit 80 and multiple circuit breakers 4 (4A, 4B, 4C, 4D, ..., 4J).

[0012] Each electrical equipment unit 10 consists of a three-phase transformer 31, a plurality of 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 plurality of electrical devices 50 include four items: the first electrical device 501, the second electrical device 502, the third electrical device 503, and the 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 its primary side connected to the circuit 81, the first winding of its secondary output connected to the input side of the first electrical equipment 501 via conductor 71, the second winding of its secondary output connected to the input side of the second electrical equipment 502 via conductor 72, the third winding of its secondary output connected to the input side of the third electrical equipment 503 via conductor 73, and the fourth winding of its secondary output connected to the input side of the fourth electrical equipment 504 via conductor 74.

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

[0015] 2. Specific Example of an Electrical Equipment Unit Figure 3 is a diagram illustrating a specific example of an electrical equipment unit 10. Figure 3(A) shows a perspective view of one electrical equipment unit 10, and Figure 3(B) shows a top view of one electrical equipment unit 10. The electrical equipment unit 10 includes a container group 200 consisting of multiple containers, a frame 30, a transformer 31, a load 32, and a scaffolding 40. In the example shown in Figure 3, the container group 200 consists 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 container 20. In Figure 3(A), the direction from the transformer 31 to the container group 200 is defined as the X direction, the direction perpendicular to the X direction and perpendicular to the plane of the paper is defined as the Y direction, and the upward direction perpendicular to the X-Y plane is defined as the Z direction. In Figure 3(B), the direction to the right of the paper is defined as the X direction, the direction perpendicular to the X direction and perpendicular to the plane of the paper is defined as the Y direction, and the direction perpendicular to the plane of the paper parallel to the X-Y plane and perpendicular to the foreground is defined as the Z direction (upward direction).

[0016] Container 20 is a transportable container. Container 20 can be of various sizes. For example, container 20 may be a container conforming to ISO standards. Container 20 may also be equipped with an air conditioner to regulate the temperature and humidity of the air inside. In this case, an outdoor unit for the air conditioner is mounted on the exterior of container 20.

[0017] Furthermore, it is desirable that the sizes of the multiple containers 20 constituting the container group 200 be uniform. Figures 4 and 5 are diagrams illustrating specific examples of the containers 20 and the support structure 30. As shown in Figure 4(A), each container 20 is rectangular and has a first long side 201 and a second long side 202 parallel to the X-Z plane. The second long side 202 is located in the Y direction relative to the first long side 201. Each container 20 has a first short side 203 and a second short side 204 parallel to the Y-Z plane. The second short side 204 is located in the X direction relative to the first short side 203. Each container 20 has a floor surface 205 and a roof surface 206 parallel to the X-Y plane. The roof surface 206 is located in the Z direction relative to the floor surface 205. The dimensions of the first long side 201 and the second long side 202 in the X direction are longer than the dimensions of the first short side 203 and the second short side 204 in the Y direction. 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 surface 205, and a roof surface 206. Similarly to 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 surface 205, and a roof surface 206.

[0018] The container group 200 is configured to house multiple electrical devices 50, each in a separate container 20. By pre-loading the electrical devices 50 into the containers 20 at a factory or similar facility and pre-installing the electrical wiring inside the containers 20, the containers 20 can be installed at the delivery site. In this case, the amount of assembly work at the delivery site is reduced, leading to shorter construction periods and improved quality. Container 25 houses the load 32. Similar to container 20, the load 32 can be pre-loaded into container 25 at a factory or similar facility and pre-installed the electrical wiring inside the containers 25, allowing the containers 25 to be installed at the delivery site.

[0019] As shown in Figure 5, the container 20 is provided with a door 91 on the first long side 201, which is one end in the short direction, and a door 92 on the second long side 202, which is the other end in the short direction. The door 91 is, for example, a foldable double-hinged door, and is structured to allow electrical equipment 50 to be brought inside by widening the opening. The door 91 is not limited to a foldable double-hinged door, but may be a combination of double-hinged doors or a sliding door. The door 92 may be, for example, a door that allows workers to enter and exit the container 20 (e.g., a single-hinged door). The second long side 202 may be provided with a door 91 that can secure a wide opening, and the first long side 201 may be provided with a door 92. Furthermore, both the first long side 201 and the second long side 202 may be provided with doors that can secure a wide opening. The door structure of container 25 may be the same as or different from the door structure of container 20.

[0020] The electrical equipment 50 is, for example, a device that converts AC power to DC power. As shown in Figure 3(A), the electrical equipment 50 may consist 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 to DC power. Examples of the power converter 51 include externally excited rectifiers such as thyristor rectifiers and self-excited converters. The chopper device 52 is a device that generates power of the voltage necessary 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 electrical equipment 50 (see Figure 2). As another example, the electrical equipment 50 may include control devices for the power converter 51 and the chopper device 52, and a container air conditioner. Alternatively, the electrical equipment 50 may omit the chopper device 52 and supply the output of the power converter 51 to the load 32.

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

[0022] The second base section 302 has the same structure as the first base section 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 base section 3022 each have an opening.

[0023] The secondary side of the transformer 31 is connected to the input side of the electrical equipment 50 (power converter 51) housed in the container 20 via conductors 71, 72, 73, and 74 from the first short side 203 on one end of the longitudinal direction of each container 20 (see Figures 2 and 4). The transformer 31 transforms the high-voltage AC power supplied from the power system 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 terminals on the secondary side of the transformer 31 are positioned facing the container group 200. Generally, the voltage on the secondary side of the transformer 31 is lower than that on the primary side. By positioning the terminals on the secondary side of the transformer 31 facing the container group 200 in this way, the conductors 71, 72, 73, and 74 can be shortened, which contributes to reducing equipment losses.

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

[0025] The scaffolding section 40 is installed on top of multiple lower containers. The scaffolding section 40 consists of members that serve as a platform for workers to access doors 91 and 92 provided on the sides of the upper containers. A grating is an example of the scaffolding section 40. Details of the scaffolding section 40 will be described later.

[0026] Let us consider an example of arranging multiple containers 20 on the support structure 30. The multiple containers 20 include, for example, multiple lower containers arranged on substantially the same plane as the support structure 30, and multiple upper containers arranged on the upper part of the support structure 30, as shown in Figure 3(A). The multiple lower containers are arranged in two rows in a checkerboard pattern, as shown in Figure 3(B). The multiple upper containers are arranged in two rows in a checkerboard pattern, as shown in Figure 3(B), so as not to overlap with the multiple lower containers.

[0027] More specifically, the multiple lower containers include a first lower container 21 and a second lower container 22. The support structure 30 is composed of a first support structure 301 and a second support structure 302. The first support structure 301 and the second support structure 302 each have a long side and a short side in the X-Y plane. The long side and short side of the first support structure 301 and the second support structure 302 in the X-Y plane are equal to the long side and short side of the container 20 in the X-Y plane, respectively. As shown in Figure 3(B), the first long side 201 of the first lower container 21 faces the second long side 3012 of the first base 301, the second long side 202 of the second lower container 22 faces the first long side 3021 of the second base 302, the second short side 204 of the first lower container 21 faces the first short side 3023 of the second base 302, and the first short side 203 of the second lower container 22 faces the second short side 3014 of the first base 301. In other words, the first lower container 21 is located in the upper left region of the page, and the second lower container 22 is located in the lower right region of the page. However, it is not limited to this. For example, the first lower container 21 may be located in the lower left region of the page, and the second lower container 22 may be located in the upper right region of the page.

[0028] The multiple upper containers include a first upper container 23 and a second upper container 24. The first upper container 23 is positioned such that its position in the X-Y plane substantially coincides with the top of the first base section 301. The second upper container 24 is positioned such that its position in the X-Y plane substantially coincides with the top of the second base section 302. As shown in Figure 3(B), the first upper container 23 is positioned in the lower left region so as not to overlap with the first lower container 21 in the same X-Y plane, and the second upper container 24 is positioned in the upper right region so as not to overlap with the second lower container 22 in the same X-Y plane. If the first lower container 21 is positioned in the lower left region and the second lower container 22 is positioned in the upper right region, the first upper container 23 is positioned in the upper left region and the second upper container 24 is positioned in the lower right region.

[0029] Let us 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 top of the first lower container 21. The second scaffolding section 42 is installed on top of the second lower container 22. In addition, safety fences or the like may be provided on the scaffolding section 40 as needed. The first scaffolding section 41 consists of members that serve as a platform for workers to 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 in the Z direction of the door provided on the first upper container 23. Furthermore, the first scaffolding section 41 and the first upper container 23 may be in contact, but if there is a gap in the Y direction, it is desirable to set the gap to a size that prevents a worker from putting their foot under it (preferably 3 cm or less).

[0030] The second scaffolding section 42 is composed of members that serve as a platform for workers to access 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 serves as 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 doors on the second upper container 24 in the Z direction. The second scaffolding section 42 and the second upper container 24 may be in contact or fixed together. However, if there is a gap in the Y direction, it is desirable to set it to a size that prevents workers from putting their feet through (preferably 3 cm or less).

[0031] The third scaffolding section 43 is composed of members that serve as a platform for workers to move between the first scaffolding section 41 and the second scaffolding section 42. This allows workers to move without having to climb up or down when accessing the first upper container 23 and the second upper container 24. Therefore, maintenance of the electrical equipment 50 stored in the upper containers can be performed efficiently.

[0032] Furthermore, the scaffolding section 40 is installed on the upper level of the frame section 30, and the frame section 30 is connected to the container 20 located below the frame section 30 using connecting parts 60 (see Figure 6). In the example shown in Figure 6, the upper frame section 30 on which the second scaffolding section 42 and the third scaffolding section 43 are installed and the second lower container 22 located below the frame section 30 are connected via connecting parts 60. The connecting parts 60 are, for example, clamp parts used to stack, load, and secure containers on container ships, and can be connected to containers.

[0033] Furthermore, with the electrical equipment unit 10 alone, workers cannot access the door on the side of the first upper container 23 opposite to the first scaffolding section 41. Similarly, workers cannot access the door on the side of the second upper container 24 opposite to the second scaffolding section 42. However, as shown in Figure 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 section 41 of the electrical equipment unit 10 is positioned close to the first upper container 23 of the adjacent electrical equipment unit 10 in the Y direction. The second scaffolding section 42 of the electrical equipment unit 10 is positioned close to the second upper container 24 of the adjacent electrical equipment unit 10 in the -Y direction. The height of the first scaffolding section 41 in the Z direction is positioned lower than the lower end in the Z direction of the door on the first upper container 23 of the adjacent electrical equipment unit 10 in the Y direction. The height of the second scaffolding section 42 in the Z direction is positioned to be lower in the Z direction than the lower end of the door in the Z direction of the door provided on the second upper container 24 of the electrical equipment unit 10 adjacent in the -Y direction. As a result, workers can access the door provided on the side 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. Similarly, workers can access the door provided on the side 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] Furthermore, the first scaffolding section 41 and the second upper container 24 adjacent to it in the Y direction may be in contact or fixed. 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 putting their foot in (preferably 3 cm or less), or to have a structure that allows for the installation of temporary scaffolding equipment to fill the gap during work. Also, the second scaffolding section 42 and the first upper container 23 adjacent to it in the -Y direction may be adjacent or fixed. 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 putting their foot in (preferably 3 cm or less), or to have a structure that allows for the installation of temporary scaffolding equipment to fill the gap during work.

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

[0036] In this way, the electrical equipment system 1 has multiple containers 20 arranged on the lower and upper levels of the support structure 30. The multiple lower containers are arranged in two rows in a checkerboard pattern, and the multiple upper containers are also arranged in two rows in a checkerboard pattern so as not to overlap with the multiple lower containers. This reduces the installation space required for the electrical equipment system 1. In addition, the electrical equipment system 1 has a scaffolding section 40 above the multiple lower containers. This allows workers to move between the multiple upper containers without having to climb up or 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, multiple electrical equipment units 10 are arranged adjacent to each other in the longitudinal direction. This allows workers to move between multiple upper containers located in the multiple electrical equipment units 10 without having to climb up or down. Consequently, the maintenance of electrical equipment 50 stored in multiple containers 20 is made more efficient.

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

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

[0040] Furthermore, the entry point for the conductor 70 of the container 20 is provided on the upper left or upper right of the first short side 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 they are opened and closed. Figure 8 is a diagram illustrating an example of wiring of conductors (70, 75, 76) related to the electrical equipment unit 10. In the example shown in Figure 8, the entry point for the conductor 70 of the container 20 is provided on the upper right of the first short side 203, which is one end of the container 20 in the longitudinal direction.

[0041] The DC output of the power converter 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 conductors 75 and 76. This allows the DC power after chopper control to be supplied to the load 32.

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

[0043] Furthermore, conductors 70, 75, and 76 are wired in a straight line, as shown in Figure 8. This shortens the wiring length of conductors 70, 75, and 76, thereby reducing the resistance loss of each conductor. Conductor 71 extends from the first output terminal OUT1 and is drawn into the upper part of the first short side 203 and near the first long side 201 of the first lower container 21, and is connected to the electrical equipment 50 inside the first lower container 21. Conductors 75 and 76 connected to the output side of the electrical equipment 50 inside the first lower container 21 are drawn out from the upper part of the second short side 204 and near the first long side 201 of the first lower container 21. Conductors 75 and 76 are also drawn into the upper part of the opening of the first short side 3023 and near the first long side 3021 of the second base portion 302. Furthermore, conductors 75 and 76 are drawn out from the upper part of the opening on the second short side 3024 of the second frame portion 302 and near the first long side 3021, and connected to the load 32.

[0044] The conductor 72 extends from the second output terminal OUT2, is drawn into an upper portion of an opening of the first short side surface 3013 of the first gantry portion 3010 and a portion near the first long side surface 3011, and is drawn out from an upper portion of an opening of the second short side surface 3014 of the first gantry portion 3010 and a portion near the first long side surface 3011. In addition, the conductor 72 is drawn into an upper portion of the first short side surface 203 of the second lower container 22 and a vicinity of the first long side surface 201, and is connected to the electrical device 50 in the second lower container 22. A conductor 75 and a conductor 76 connected to an output side of the electrical device 50 in the second lower container 22 are drawn out from an upper portion of the second short side surface 204 of the second lower container 22 and a portion near 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 drawn into an upper portion of the first short side surface 203 of the first upper container 23 and a portion near the first long side surface 201, and is connected to the electrical device 50 in the first upper container 23. A conductor 75 and a conductor 76 connected to an output side of the electrical device 50 in the first upper container 23 are drawn out from an upper portion of the second short side surface 204 of the first upper container 23 and a portion near the first long side surface 201, pass through an upper portion (in the Z direction) of the second scaffold portion 42, and are connected to the load 32.

[0046] The conductor 74 extends from the fourth output terminal OUT4, passes through an upper portion (in the Z direction) of the first scaffold portion 41, is drawn into an upper portion of the first short side surface 203 of the second upper container 24 and a portion near the first long side surface 201, and is connected to the electrical device 50 in the second upper container 24. A conductor 75 and a conductor 76 connected to an output side of the electrical device 50 in the second upper container 24 are drawn out from an upper portion of the second short side surface 204 of the second upper container 24 and a portion near the first long side surface 201, and are connected to the load 32.

[0047] As described above, the conductor 72 penetrating the first frame portion 301 is arranged 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 arranged on the -Y direction side with respect to the rotation radius when the door is opened and closed, or the lower end of the conductor 72 is arranged at a position higher in the Z direction than the upper end of the door. Furthermore, the lower end of the conductor 72 is arranged at a position higher in the Z direction than the upper end of the door so as not to interfere with the opening and closing 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.

[0048] The conductor 75 and the conductor 76 penetrating the second frame portion 302 are arranged so as not to interfere with the opening and closing of the 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 conductor 75 and the conductor 76 are arranged at a position higher in the Z direction than the upper end of the door. Furthermore, the conductor 75 and the conductor 76 are arranged on the -Y direction side with respect to the rotation radius when the door is opened and closed, or the lower ends of the conductor 75 and the conductor 76 are arranged at a position higher in the Z direction than the upper end of the door, so as not to interfere with the opening and closing of the 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.

[0049] The conductor 75 and the conductor 76 connected to the load 32 via the upper portion (in the Z direction) of the second scaffolding portion 42 are arranged so as not to interfere with the opening and closing of the door provided on the first long side surface 201 of the second upper container 24 of the electrical equipment unit 10. Specifically, the conductor 75 and the conductor 76 are arranged on the -Y direction side with respect to the rotation radius when the door is opened and closed, or the lower ends of the conductor 75 and the conductor 76 are arranged at a position higher in the Z direction than the upper end of the door. Furthermore, the lower ends of the conductor 75 and the conductor 76 are arranged at a position higher in the Z direction than the upper end of the door so as not to interfere with the opening and closing of the 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 is input to the second upper container 24 via the upper part (Z direction) of the first scaffolding section 41, is positioned so as not to obstruct the opening and closing of the door provided on the second long side 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 obstruct the opening and closing of the door provided on the first long side 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 rotation radius when the door is opened and 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 group of containers 200 in which a plurality of electrical devices 50 are housed in separate containers 20, a transformer 31 positioned on one longitudinal end of each container 20, a load 32 positioned on the other longitudinal end of each container 20, and a frame 30 capable of housing each container 20 in an upper or lower position. The transformer 31 is configured to supply power to the load 32 via a plurality of electrical devices 50 connected in parallel. The group of containers 200 includes a plurality of lower containers arranged in two rows in a checkerboard pattern on the lower section of the frame 30, and a plurality of upper containers arranged in two rows in a checkerboard pattern on the upper section of the frame 30 so as not to overlap with the plurality of lower containers. The electrical equipment unit 10 further includes a scaffolding 40 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 up or down. Therefore, maintenance of electrical equipment 50 stored in multiple containers 20 (container group 200) can be performed efficiently.

[0052] 5. Figure 9 of the other embodiment is a diagram illustrating the outline of the electrical equipment system 1A according to another embodiment. In the electrical equipment system 1 described above, a plurality of electrical equipment units 10 are arranged adjacent to each other in the longitudinal direction. In this case, there are places where there is no scaffolding for workers to access the doors provided on the sides of the upper containers of the electrical equipment units 10 located at both ends. For example, as shown in Figure 9, on the side of the door 91 provided on the side of the first upper container 23 of electrical equipment unit 10A, there is no adjacent electrical equipment unit 10, so there is no scaffolding for workers to access the door 91 of the first upper container 23. Also, on the side of the door 92 provided on the side of the second upper container 24 of electrical equipment unit 10J, there is no adjacent electrical equipment unit 10, so there is no scaffolding for workers to access the door 92 of the second upper container 24. Thus, workers cannot access some of the doors provided on the sides of the upper containers of the electrical equipment units 10 located at both ends.

[0053] According to the electrical equipment system 1A, in the electrical equipment units 10 located at both ends, an additional scaffolding section 100 is provided to access the door of the upper container on the side where there is no adjacent electrical equipment unit 10. The additional scaffolding section 100 includes an additional first scaffolding section 101 and an additional second scaffolding section 102. The additional first scaffolding section 101 is composed of a member that serves as a scaffolding when 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 additional first scaffolding section 101 is composed of a member having a frame structure the same size as the container 20. In the example shown in Figure 9, the additional first scaffolding section 101 is provided as a scaffolding 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 additional first scaffolding section 101 in the Z direction is lower than the lower end of the door 91 of the first upper container 23 in the electrical equipment unit 10A.

[0054] Another second scaffolding section 102 is composed of a member that serves as a platform for accessing the door of the container 20 on the side of the electrical equipment unit 10 at both ends where there is no adjacent electrical equipment unit 10. For example, another second scaffolding section 102 is composed of a member having a frame structure the same size as the container 20. In the example shown in Figure 9, another second scaffolding section 102 is provided as a platform for accessing the door 92 of the second upper container 24 in the electrical 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 electrical 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 on the electrical equipment units 10 at both ends.

[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... Stand 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 converter, 52...Chopper device, 60...Connecting parts, 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 multiple electrical equipment units, wherein each electrical equipment unit comprises: a group of containers each containing multiple electrical devices in separate containers; a transformer positioned at one end of the longitudinal direction of each container; a load positioned at the other end of the longitudinal direction of each container; and a frame capable of housing each container on an upper or lower level, wherein the transformer is configured to supply power to the load via the multiple electrical devices connected in parallel; the group of containers comprises: a plurality of lower containers arranged in two rows in a checkerboard pattern on the lower level of the frame; and a plurality of upper containers arranged in two rows in a checkerboard pattern on the upper level of the frame so as not to overlap with the plurality of lower containers; and the electrical equipment unit further comprises a scaffolding for accessing doors provided on the sides of the plurality of upper containers.

2. An electrical equipment system according to claim 1, characterized in that the scaffolding portion is provided on top of the plurality of lower containers.

3. An electrical equipment system according to claim 1 or 2, wherein the plurality of electrical equipment units are arranged adjacent to each other in the longitudinal direction, and the electrical equipment system further comprises, in the case of electrical equipment units located at both ends, another scaffolding portion for accessing a door provided on the side of the upper container on the side where there are no adjacent electrical equipment units.

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

5. An electrical equipment system according to claim 4, wherein the electrical equipment further includes a chopper device that performs chopper control to generate power of a voltage necessary for driving the load based on the DC power.

Images