Power conversion unit and power system

Abstract

To provide a power conversion unit capable of efficiently cooling a power converter, and to provide a power system thereof.SOLUTION: According to a power converter, a power conversion unit 10 comprises a power converter 20, and a housing 30 in which the power converter 20 is installed. The housing 30 is provided with a side face part 54 adjacent to the other housing 70. The side face part 54 comprises an outflow port 58 for discharging air F inside the housing 30 to an inflow port 95 of another side face part 92 with which the other housing 70 is provided.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present embodiments relate generally to power conversion units and power systems. [Background technology]

[0002] 2. Description of the Related Art There is known a power conversion unit having a power conversion device mounted inside a housing. Such a power conversion unit is sometimes installed, for example, outdoors. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2018 / 096677 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, a substation or the like may have a power system having a power conversion unit and other units equipped with other devices such as a DC panel and an input / output panel. Such a power system may have a side-by-side panel configuration in which the power conversion unit and the other units are arranged adjacent to each other.

[0005] The housing of the power conversion unit has an intake port and an exhaust port to cool the power conversion device mounted inside. In the case of a side-by-side configuration, the intake port and the exhaust port must be provided on the front side or the back side of the housing. In such a case, if the intake port and the exhaust port are not made large, there is a risk that the equipment mounted inside cannot be cooled efficiently.

[0006] The present embodiment has been made in consideration of the above-mentioned problems, and has an object to provide a power conversion unit and a power system capable of efficiently cooling a power conversion device. [Means for solving the problem]

[0007] This embodiment is a power conversion unit comprising a power conversion device and a housing in which the power conversion device is mounted, the housing having a side portion adjacent to another housing, the side portion having an outlet for allowing air inside the housing to flow out to the other housing. Effect of the Invention

[0008] According to the present embodiment, it is possible to provide a power conversion unit and a power system capable of efficiently cooling a power conversion device. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a front view showing a power system according to an embodiment. [Diagram 2] 2 is a side view of the power conversion unit in FIG. 1, as viewed from the direction of arrow AA. [Diagram 3] 2 is a cross-sectional view of the power conversion unit and other units in FIG. 1, as viewed in the direction of arrow BB. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing a power system according to an embodiment. FIG. 2 is a side view of the power conversion unit in FIG. 1 as viewed from the direction of arrow AA. 3 is a cross-sectional view of the power conversion unit and other units in FIG. 1 as viewed from the direction of arrow BB.

[0011] The power system 1 is installed in, for example, a substation installed outdoors. The power system 1 converts power supplied from, for example, a power plant and supplies the power to a railway or the like. The power system 1 includes a power conversion unit 10 and another unit 60.

[0012] In this specification, the terms "upper", "lower", "right" and "left" refer to upper, lower, right and left, respectively, based on a person standing in front of the power conversion unit 10 and looking at the power conversion unit 10. In this specification, the direction from the power conversion unit 10 to the person standing in front of the power conversion unit 10 is defined as the "front" direction, and the opposite direction is defined as the "rear" direction.

[0013] 1, in this example, another unit 60 is adjacent to the left side of the power conversion unit 10. The power conversion unit 10 and the other unit 60 are separate units. The power conversion unit 10 and the other unit 60 are integrated on-site with bolts or the like.

[0014] 1, the power conversion unit 10 includes a power conversion device 20 and a housing 30. The power conversion device 20 performs, for example, conversion between DC power and AC power and control of power. The power conversion device 20 is mounted inside the housing 30.

[0015] The housing 30 includes a main body 40 and a roof 50. The housing 30 is installed, for example, on the ground G outdoors. The main body 40 has a bottom surface 41 installed on the ground G, a front surface 42 and a back surface 43 extending upward from the bottom surface 41 and facing each other in the front-to-rear direction, and a left side surface 44 and a right side surface 45 extending upward from the bottom surface 41 and facing each other in the left-to-right direction.

[0016] The power conversion device 20 is placed on the upper surface of the bottom surface portion 41. The front surface portion 42 extends upward from the front end of the bottom surface portion 41. The rear surface portion 43 extends upward from the rear end of the bottom surface portion 41. The left side surface portion 44 extends upward from the left end of the bottom surface portion 41. The right side surface portion 45 extends upward from the right end of the bottom surface portion 41.

[0017] The main body 40 has a first opening 40b for discharging air F from the interior 40a. The first opening 40b is provided on at least one side of the front and rear directions of the main body 40. Specifically, the first opening 40b communicates with the inside of a protruding portion 50b of the roof 50, which will be described later. The first opening 40b is covered by the roof 50. This prevents rainwater and the like from entering the interior 40a of the main body 40 from the first opening 40b.

[0018] In this example, the main body 40 is formed in a box shape having a first opening 40b that opens upward, for example. Note that the front and back parts 42 and 43 of the main body 40 may extend to the inside of the roof 50, and a first opening penetrating in the front and back directions may be formed in the front and back parts.

[0019] The front surface portion 42 has a door 42a. An operator can perform maintenance of the power conversion device 20 by opening and closing the door 42a. The housing 30 has an air intake 42b that draws external air F (outside air) into the interior 40a. Specifically, the air intake 42b is provided in the front surface portion 42.

[0020] The cover 47 is provided on the front surface 42 at a position corresponding to the intake port 42b. The intake port 42b is covered by the cover 47. The cover 47 is open at the bottom. The cover 47 prevents rainwater and the like from entering the interior 40a of the main body 40 through the intake port 42b. The air F that flows into the interior 40a of the main body 40 cools the power conversion device 20 and is exhausted from the first opening 40b above.

[0021] 2 and 3, rear portion 43 has air intake 43a and cover 48. Air intake 43a and cover 48 have the same configuration as air intake 42b and cover 47 of front portion 42. It is sufficient that the air intake is provided in at least one of front portion 42 and rear portion 43.

[0022] The left side surface portion 44 is adjacent to a right side surface portion 82 of a main body portion 80 of another housing 70. For example, a cable or a conductor (neither of which is shown) extending from the power conversion device 20 is connected to a device 65 of another unit 60 via a through hole (not shown) formed in the left side surface portion 44.

[0023] The roof 50 is located above the main body 40 and attached to the main body 40. The roof 50 is formed, for example, by combining a plurality of plate materials. The roof 50 has a top surface 51, a front surface 52 and a rear surface 53 that extend downward from the top surface 51 and face each other in the front-to-rear direction, and a left side surface 54 and a right side surface 55 that extend downward from the top surface 51 and face each other in the left-to-right direction. The roof 50 is formed in a box shape that is open downward.

[0024] As shown in Fig. 2, the top surface portion 51 slopes downward from the front to the rear. This allows the roof 50 to prevent rainwater and the like from accumulating on the top surface portion 51. The front surface portion 52 extends downward from the front end of the top surface portion 51. The rear surface portion 53 extends downward from the rear end of the top surface portion 51. The left side surface portion 54 extends downward from the left end of the top surface portion 51. The right side surface portion 55 extends downward from the right end of the top surface portion 51.

[0025] As shown in Figs. 2 and 3, the roof 50 has a covering portion 50a located above the main body portion 40, and a protruding portion 50b protruding in the front-rear direction from the covering portion 50a. That is, the front portion 52 protrudes forward by a dimension L1 from the front portion 42 of the main body portion 40. The rear portion 53 protrudes rearward by a dimension L2 from the rear portion 43 of the main body portion 40. In other words, the dimension of the roof 50 in the front-rear direction is longer than the dimension of the main body portion 40 in the front-rear direction. Note that in this example, the roof 50 has protruding portions 50b in both the front-rear directions, but it is sufficient to have the protruding portion 50b on at least one side.

[0026] The protruding portion 50b has a second opening 50b1 that opens downward and communicates with the outside. As a result, the inside 40a of the main body 40 of the housing 30 communicates with the outside through the first opening 40b and the second opening 50b1. A part of the air F drawn into the inside 40a of the main body 40 from the intake ports 42b and 43a cools the power conversion device 20 and is exhausted to the outside through the first opening 40b and the second opening 50b1. That is, the first opening 40b and the second opening 50b1 constitute an exhaust port of the power conversion unit 10.

[0027] The outer surface of left side surface portion 54 is located on the same plane in the up-down direction as the outer surface of left side surface portion 44 of main body portion 40. Left side surface portion 54 is adjacent to right side surface portion 92 of roof 90 of another housing 70. The side surface portion of housing 30 adjacent to the other housing 70 has a first side surface portion (left side surface portion 44) that forms the side surface of main body portion 40, and a second side surface portion (left side surface portion 54) that forms the side surface of roof 50.

[0028] The outlet 58 is formed in a side surface adjacent to another housing 70. Specifically, the outlet 58 is formed in the left side surface 54 of the roof 50 (the second side surface of the housing 30). As shown in FIG. 2, two outlets 58 are formed spaced apart in the front-rear direction. The number of outlets 58 may be one, or three or more. The outlet 58 is provided above the intake ports 42b, 43a. This allows the outlet 58 to efficiently discharge the air F that has absorbed the heat of the power conversion device 20.

[0029] As shown in Fig. 1, the other unit 60 is adjacent to the power conversion unit 10. The other unit 60 includes a device 65 and a housing 70. The device 65 generates less heat than the power conversion device 20, and is, for example, a DC panel or an input / output panel. The device 65 is mounted inside the housing 70.

[0030] The housing 70 and the housing 30 of the power conversion unit 10 are formed separately and independently. The housing 70 has a main body 80 and a roof 90. The main body 80 has a similar configuration to the main body 40 of the power conversion unit 10, and therefore a description thereof will be omitted.

[0031] The right side surface 82 of the main body 80 is adjacent to the left side surface 44 of the power conversion unit 10. In addition, the right side surface 92 of the roof 90 is adjacent to the left side surface 54 of the power conversion unit 10. As shown in Fig. 3, the other unit 60 has an inlet 95 at a position corresponding to the outlet 58 of the power conversion unit 10. Specifically, the inlet 95 penetrates the right side surface 92 of the roof 90 in the left-right direction. In this example, two inlets 95 are formed corresponding to the outlets 58.

[0032] When the power conversion unit 10 and another unit 60 are arranged adjacent to each other, the interior 40a of the main body 40 of the power conversion unit 10 and the interior 80a of the main body 80 of the other unit 60 are connected by the outlet 58 and the inlet 95.

[0033] 3, a part of the air F that has cooled the power conversion device 20 inside 40a of the main body 40 is exhausted to the outside through the first opening 40b and the second opening 50b1. The power conversion device 20 generates more heat than the device 65. Therefore, another part of the air F flows out through the outlet 58 and the inlet 95 into the inside 80a of the main body 80 of the other unit 60.

[0034] The other unit 60 has a first opening 97a and a second opening 97b. The first opening 97a has a similar configuration to the first opening 40b. The second opening 97b has a similar configuration to the second opening 50b1. The first opening 97a and the second opening 97b serve as exhaust ports for the air that has cooled the device 65.

[0035] A portion of the air F that flows out into the interior 80a of the main body 80 is exhausted to the outside through the first opening 97a and the second opening 97b of the other unit 60. The power system 1 exhausts the air that has cooled the devices 65 and the air F that has cooled the power conversion device 20 from the first opening 97a and the second opening 97b. That is, the first opening 97a and the second opening 97b serve as exhaust ports for the air that has cooled the devices 65 and the air F that has cooled the power conversion device 20.

[0036] The outlet 58, the inlet 95, and the first and second openings 97a and 97b are provided on the upper end side of the housings 30 and 70. This allows the air F that has undergone heat exchange in the power converter 20 to be exhausted to the outside through the first opening 97a and the second opening 97b while minimizing contact with the devices 65 of the other units 60. As a result, the effect of the air F on the devices 65 can be suppressed.

[0037] Here, for example, if there is no outlet 58 and inlet 95, the protrusion dimensions L1, L2 of roof 50 must be increased to enlarge second opening 50b1, otherwise power conversion device 20 may not be efficiently cooled. In such a case, if the external shapes of the multiple other units arranged next to power conversion unit 10 are matched to power conversion unit 10 in order to improve appearance, there is a risk that power system 1 may become larger overall.

[0038] According to this embodiment, the air F that has cooled the power conversion device 20 can be discharged through the first opening 97a and the second opening 97b of another adjacent unit 60. This makes it possible to efficiently cool the power conversion device 20 even if the protruding dimensions L1, L2 in the front-rear direction of the roof 50 are made as small as possible. In addition, the power system 1 can be made more compact.

[0039] In the above embodiment, an example has been described in which the outlet 58 is formed on the left side surface 54 of the roof 50 of the power conversion unit 10, and the inlet 95 is formed on the right side surface 92 of the roof 90 of the other unit 60. However, the present invention is not limited to this example, and for example, an outlet may be formed on the left side surface 44 of the main body 40 of the power conversion unit 10, and an outlet may be formed on the right side surface 82 of the main body 80 of the other unit 60.

[0040] Furthermore, when another unit is adjacent to the right side of the power conversion unit 10, the outlet may be formed on the right side of the power conversion unit 10, and the inlet may be formed on the left side of the other unit.

[0041] In the above-described embodiment, the first opening 97a and the second opening 97b of the other unit 60 are configured similarly to the first opening 40b and the second opening 50b1 of the power conversion unit 10. However, the present invention is not limited to this, and for example, the exhaust port of the other unit 60 may have any configuration.

[0042] Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. In addition, the above-mentioned embodiments can be implemented in combination with each other. [Explanation of symbols]

[0043] 1. Power System 10 Power Conversion Unit 20 Power conversion device 30 Case 40 Main body 40a Inside 40b 1st opening 41 Bottom part 42 Front part 42a Door 42b Air intake 43 Rear part 43a Air intake 44 Left side part (first side part) 45 Right side part 47, 48 Cover 50 Roof 50a Covering part 50b Protrusion 50b1 2nd opening 51 Top section 52 Front 53 Rear part 54 Left side part (second side part) 55 Right side part 58 Outlet 60 other units 65 Equipment 70 Case 80 Main body 80a internal 82 Right side part 90 Roof 92 Right side part 95 Inlet 97a 1st opening 97b 2nd opening F Air G ground

Claims

1. A power conversion device; A housing in which the power conversion device is mounted; Equipped with The housing has a side portion adjacent to another housing, the side surface portion has an outlet port through which air inside the housing flows out to the other housing, The housing includes: A main body having the power conversion device mounted therein; A roof located above the main body and attached to the main body; having The side surface portion is a first side portion forming a side surface of the main body portion; A second side portion forming a side surface of the roof; having The outlet is formed in the second side portion, The roof has a covering portion located above the main body portion and a protruding portion protruding in a front-rear direction from the covering portion, The body portion has a first opening communicating with an interior of the protrusion, the protruding portion has a second opening portion that opens downward and communicates with the outside, A power conversion unit in which a portion of the air inside the housing is exhausted to the outside through the first opening and the second opening, and another portion of the air flows out from the outlet to the other housing.

2. The housing has an air intake port for drawing in outside air, The power conversion unit according to claim 1 , wherein the outlet is provided above the intake port.

3. A power conversion unit according to claim 1 or 2; and another unit adjacent to the power conversion unit, The other unit has an inlet at a position corresponding to the outlet of the power conversion unit.

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