Static Inductor Unit

Abstract

A stationary inductor unit according to an embodiment has a stationary inductor, a radiator, a radiation duct, and a restriction member. The stationary inductor includes an insulation medium. The radiator is connected to the stationary inductor, and is such that the insulation medium circulates therein. The radiation duct accommodates the radiator and has an upper opening and a lower opening. The restriction member restricts the circulation, between the upper opening and lower opening, of air that has passed through the stationary inductor and the outer side of the radiation duct at the accommodation chamber of the radiation duct.

Description

[Technical field]

[0001] An embodiment of the present invention relates to a stationary inductor unit. [Background technology]

[0002] The stationary inductor unit includes a stationary inductor and a heat sink. The stationary inductor includes a transformer and an insulating medium. The heat sink is connected to the stationary inductor and the insulating medium flows through the heat sink. The heat sink cools the insulating medium.

[0003] Due to overcrowding caused by population growth in urban areas, substations are sometimes installed indoors. When a static inductor unit is installed in a small space such as an indoor substation or an underground substation, the cooling performance of the insulating medium may be reduced. There is a demand for a static inductor unit that can suppress the reduction in the cooling performance of the insulating medium. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-180182 A [Patent Document 2] Japanese Patent Application Publication No. 1-312810 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a stationary inductor unit capable of suppressing a decrease in the cooling performance of an insulating medium. [Means for solving the problem]

[0006] The stationary inductor unit of the embodiment includes a stationary inductor, a heat sink, a heat dissipation duct, and a restricting member. The stationary inductor includes an insulating medium. The heat sink is connected to the stationary inductor, and the insulating medium flows through the heat dissipation duct. The heat dissipation duct houses the heat sink and has an upper opening and a lower opening. The restricting member restricts the flow of air between the upper opening and the lower opening via the outside of the heat dissipation duct in a housing chamber for the stationary inductor and the heat dissipation duct. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a schematic configuration diagram of a stationary induction unit according to the first embodiment. [Diagram 2] FIG. 4 is a schematic configuration diagram of a stationary inductor unit according to a modified example of the first embodiment. [Diagram 3] FIG. 11 is a schematic configuration diagram of a stationary induction unit according to a second embodiment. [Figure 4] FIG. 11 is a schematic configuration diagram of a stationary induction unit according to a third embodiment. [Diagram 5] FIG. 13 is a schematic configuration diagram of a stationary induction unit according to a fourth embodiment. [Figure 6] FIG. 13 is a schematic configuration diagram of a stationary inductor unit according to a modified example of the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, a stationary induction unit according to an embodiment will be described with reference to the drawings. (First embodiment) 1 is a schematic configuration diagram of a stationary induction unit according to a first embodiment. The stationary induction unit 10 includes a stationary induction unit 11, a heat sink 15, and a heat sink duct 17.

[0009] The stationary inductor 11 contains a transformer and an insulating medium (both not shown) inside a tank. The transformer has an iron core and a winding (coil). The insulating medium is insulating oil or insulating gas, etc. For example, the insulating gas is SF6, etc., and the insulating oil is mineral oil or ester oil, etc. The insulating medium is filled around the transformer. The transformer generates heat as current flows through the winding. The heat from the transformer is transferred to the surrounding insulating medium. A heat sink 15, described next, cools the insulating medium.

[0010] The heat sink (radiator) 15 has a flow path through which the insulating medium flows. For example, the flow path is formed in a flat plate shape. A plurality of flat plate-shaped flow paths are arranged side by side in the horizontal direction. The heat sink 15 is connected to the stationary inductor 11 by pipes 13a and 13b. The pipes 13a and 13b are the upper pipe 13a and the lower pipe 13b. The insulating medium that has become hot in the stationary inductor 11 flows into the heat sink 15 through the upper pipe 13a. The insulating medium flowing through the heat sink 15 exchanges heat with the surrounding air to dissipate heat and is cooled. The cooled insulating medium returns to the stationary inductor 11 through the lower pipe 13b.

[0011] Heat dissipation duct (ventilation duct) 17 horizontally surrounds heat radiator 15. Heat dissipation duct 17 has an upper opening 18a and a lower opening 18b.

[0012] The stationary inductor unit 10 is disposed inside the accommodation chamber 1. The accommodation chamber 1 has an upper ventilation opening 6a and a lower ventilation opening 6b. The upper ventilation opening 6a is disposed at the upper part of the accommodation chamber 1, and the lower ventilation opening 6b is disposed at the lower part of the accommodation chamber 1. The ventilation openings 6a and 6b communicate the inside and outside of the accommodation chamber 1.

[0013] Cold air from outside the storage chamber 1 flows into the storage chamber 1 through the lower ventilation opening 6b. The cold air flows into the heat dissipation duct 17 through the lower opening 18b. The cold air flowing through the heat dissipation duct 17 exchanges heat with the insulating medium flowing through the radiator 15, absorbing heat and changing into warm air. The warm air flows out from the upper opening 18a of the heat dissipation duct 17 into the storage chamber 1. The warm air flows out from the upper ventilation opening 6a to the outside of the storage chamber 1. A blower may be attached to the ventilation openings 6a and 6b.

[0014] In order to save space, the stationary induction unit 10 may be accommodated in a narrow accommodation chamber 1. In this case, a part of the warm air flowing out from the upper opening 18a of the heat dissipation duct 17 does not flow out of the accommodation chamber 1 from the upper ventilation opening 6a, but remains inside the accommodation chamber 1. The warm air descends outside the heat dissipation duct 17 along the side wall of the accommodation chamber 1. The warm air flows into the heat dissipation duct 17 from the lower opening 18b. That is, the warm air circulates inside the accommodation chamber 1. This reduces the heat exchange efficiency of the radiator 15, and the cooling performance of the insulating medium of the stationary induction unit 10 decreases.

[0015] The stationary induction unit 10 has a restricting member 20. The restricting member 20 restricts the circulation of warm air inside the accommodation chamber 1. The restricting member 20 restricts the flow of air between the upper opening 18a and the lower opening 18b through the outside of the heat dissipation duct 17 inside the accommodation chamber 1.

[0016] The stationary induction unit 10 has an upper connection duct 21 as a restricting member 20. The upper connection duct 21 connects the upper opening 18a of the heat dissipation duct 17 and the upper ventilation opening 6a of the accommodation chamber 1.

[0017] The warm air flowing out from the upper opening 18a passes through the upper connection duct 21 and flows out from the upper ventilation port 6a to the outside of the accommodation chamber 1. The upper connection duct 21 regulates the flow of air between the upper opening 18a and the lower opening 18b via the outside of the heat dissipation duct 17 inside the accommodation chamber 1. The warm air does not flow into the heat dissipation duct 17 from the lower opening 18b. Instead, the cold air flowing into the accommodation chamber 1 from the lower ventilation port 6b flows into the heat dissipation duct 17 from the lower opening 18b. This improves the heat exchange efficiency of the radiator 15, and suppresses the deterioration of the cooling performance of the insulating medium of the stationary induction unit 10. As a result, the stationary induction unit 10 can be accommodated inside the narrow accommodation chamber 1. The size of the accommodation chamber 1 can be reduced to the extent of the physical size of the stationary induction unit 10.

[0018] The stationary induction unit 10 may have a lower connection duct (not shown) as the restricting member 20 instead of the upper connection duct 21. The lower connection duct connects the lower ventilation port 6b of the accommodation chamber 1 and the lower opening 18b of the heat dissipation duct 17. In this case, only the cold air flowing in from the lower ventilation port 6b flows into the lower opening 18b of the heat dissipation duct 17. The lower connection duct restricts the flow of air between the upper opening 18a and the lower opening 18b via the outside of the heat dissipation duct 17 inside the accommodation chamber 1. The warm air flowing out from the upper opening 18a of the heat dissipation duct 17 does not flow into the lower opening 18b. This improves the heat exchange efficiency of the radiator 15, and suppresses the deterioration of the cooling performance of the insulating medium of the stationary induction unit 10. The stationary inductor unit 10 may have, as the restricting member 20, both the upper connecting duct 21 and the lower connecting duct.

[0019] 2 is a schematic diagram of a static induction unit according to a modification of the first embodiment. The static induction unit 10 according to the modification is different from the first embodiment in that it has a blower (fan, cooling fan) 30. The blower 30 is attached to the lower opening 18b of the heat dissipation duct 17. The blower 30 blows air from the lower opening 18b to the inside of the heat dissipation duct 17. The flow of the cool air that has flowed into the accommodation chamber 1 from the lower ventilation opening 6b into the heat dissipation duct 17 is promoted. This improves the cooling performance of the insulating medium of the static induction unit 10.

[0020] Second Embodiment 3 is a schematic diagram of a stationary induction unit according to the second embodiment. The stationary induction unit 10 according to the second embodiment differs from the first embodiment in that it has a closure plate 23 as a restricting member 20. Descriptions of the second embodiment that are similar to the first embodiment may be omitted.

[0021] The closure plate 23 divides the interior of the accommodation chamber 1 into an upper chamber 2a and a lower chamber 2b. The upper chamber 2a includes an upper opening 18a of the heat dissipation duct 17 and an upper ventilation port 6a of the accommodation chamber 1. The lower chamber 2b includes a lower opening 18b of the heat dissipation duct 17 and a lower ventilation port 6b of the accommodation chamber 1. The lower chamber 2b further includes a stationary inductor 11. The closure plate 23 is disposed outside the heat dissipation duct 17 and in the middle of the heat dissipation duct 17 in the up-down direction.

[0022] Warm air flows out from the upper opening 18a of the heat dissipation duct 17 to the upper chamber 2a. The closing plate 23 restricts the flow of air between the upper opening 18a and the lower opening 18b via the outside of the heat dissipation duct 17 inside the accommodation chamber 1. The descent of the warm air to the lower chamber 2b is restricted by the closing plate 23. The warm air does not flow into the heat dissipation duct 17 from the lower opening 18b included in the lower chamber 2b. The cold air that flows into the lower chamber 2b from the lower ventilation port 6b flows into the heat dissipation duct 17 from the lower opening 18b. This improves the heat exchange efficiency of the radiator 15, and suppresses the deterioration of the cooling performance of the insulating medium of the stationary induction unit 10.

[0023] A fan may be attached to the lower opening 18b of the heat dissipation duct 17 of the stationary induction unit 10. This improves the cooling performance of the insulating medium of the stationary induction unit 10.

[0024] (Third embodiment) 4 is a schematic configuration diagram of a stationary induction unit of the third embodiment. The stationary induction unit 10 of the third embodiment differs from the first embodiment in that it has a partition wall 25. Description of the third embodiment in the same parts as the first embodiment may be omitted.

[0025] The stationary induction unit 11 generates heat during operation. The heat of the stationary induction unit 11 is transferred to the surrounding air. As described above, the stationary induction unit 10 may be accommodated inside a narrow accommodation chamber 1. In this case, the warm air around the stationary induction unit 11 may flow into the heat dissipation duct 17 from the lower opening 18b. This reduces the heat exchange efficiency of the radiator 15, and the cooling performance of the insulating medium of the stationary induction unit 10 decreases.

[0026] The stationary inductor unit 10 has a partition wall 25. The partition wall 25 divides the inside of the accommodation chamber 1 into a first chamber 3c and a second chamber 3d. The first chamber 3c includes a heat sink 15 and a heat dissipation duct 17. A blower 30 is attached to a lower opening 18b of the heat dissipation duct 17. The second chamber 3d includes the stationary inductor 11.

[0027] The partition wall 25 regulates the flow of air between the first chamber 3c and the second chamber 3d. The movement of warm air from the second chamber 3d including the stationary inductor 11 to the first chamber 3c including the heat dissipation duct 17 is regulated by the partition wall 25. The warm air around the stationary inductor 11 does not flow into the lower opening 18b of the heat dissipation duct 17. This suppresses the deterioration of the cooling performance of the insulating medium of the stationary inductor unit 10.

[0028] The first chamber 3c includes the upper ventilation opening 6a and the lower ventilation opening 6b described above (hereinafter, sometimes referred to as the first upper ventilation opening 6a and the first lower ventilation opening 6b). The second chamber 3d includes the second upper ventilation opening 7a and the second lower ventilation opening 7b. The second upper ventilation opening 7a is disposed at the upper part of the second chamber 3d, and the second lower ventilation opening 7b is disposed at the lower part of the second chamber 3d. The ventilation openings 7a and 7b communicate the inside of the second chamber 3d with the outside of the storage chamber 1.

[0029] Warm air around the stationary inductor 11 flows out of the accommodation chamber 1 through the second upper ventilation opening 7a. Cold air outside the accommodation chamber 1 flows into the second chamber 3d through the second lower ventilation opening 7b. This suppresses the temperature rise of the stationary inductor 11 in the second chamber 3d. A blower may be attached to the ventilation openings 7a and 7b.

[0030] (Fourth embodiment) 5 is a schematic diagram of a stationary induction unit according to the fourth embodiment. The stationary induction unit 10 according to the fourth embodiment differs from the second and third embodiments in that it has a closure plate 23 as a restricting member 20 in addition to a partition wall 25. Descriptions of the fourth embodiment that are similar to the second and third embodiments may be omitted.

[0031] The closing plate 23 divides the inside of the first chamber 3c into an upper chamber 2a and a lower chamber 2b. The upper chamber 2a includes an upper opening 18a of the heat dissipation duct 17 and a first upper ventilation opening 6a of the first chamber 3c. The lower chamber 2b includes a lower opening 18b of the heat dissipation duct 17 and a first lower ventilation opening 6b of the first chamber 3c.

[0032] The closing plate 23 restricts the flow of air between the upper opening 18a and the lower opening 18b via the outside of the heat dissipation duct 17 inside the first chamber 3c. The warm air flowing out from the upper opening 18a to the upper chamber 2a does not flow into the heat dissipation duct 17 from the lower opening 18b of the lower chamber 2b. The partition wall 25 restricts the flow of air between the first chamber 3c and the second chamber 3d. The warm air around the stationary inductor 11 in the second chamber 3d does not flow into the heat dissipation duct 17 in the first chamber 3c. This suppresses the deterioration of the cooling performance of the insulating medium of the stationary inductor unit 10.

[0033] The stationary induction unit 10 of the fourth embodiment has a closure plate 23 as a restricting member 20 in addition to the partition wall 25. In contrast, the stationary induction unit 10 may have one or both of an upper connecting duct 21 and a lower connecting duct as a restricting member 20 in addition to the partition wall 25.

[0034] 6 is a schematic diagram of a static induction unit according to a modification of the fourth embodiment. The static induction unit 10 according to the modification is different from the fourth embodiment in that it has a blower 30. The blower 30 is attached to the lower opening 18b of the heat dissipation duct 17. The blower 30 blows air from the lower opening 18b to the inside of the heat dissipation duct 17. The flow of the cold air that has flowed into the lower chamber 2b from the first lower ventilation opening 6b into the heat dissipation duct 17 is promoted. This improves the cooling performance of the insulating medium of the static induction unit 10.

[0035] According to at least one of the embodiments described above, there is provided a restricting member 20 that restricts the flow of air between the upper opening 18a and the lower opening 18b via the outside of the heat dissipation duct 17 inside the accommodation chamber 1. This makes it possible to suppress a decrease in the cooling performance of the insulating medium.

[0036] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents described in the claims, as well as in the scope and spirit of the invention. [Explanation of symbols]

[0037] 1...containment chamber, 2a...upper chamber, 2b...lower chamber, 6a...upper ventilation port, 6b...lower ventilation port, 10...static inductor unit, 11...static inductor, 15...heat sink, 17...heat sink duct, 18a...upper opening, 18b...lower opening, 20...regulating member, 21...upper connecting duct (connecting duct), 23...closure plate, 25...partition wall, 30...blower.

Claims

1. a stationary inductor including an insulating medium; a heat sink connected to the stationary inductor and through which the insulating medium flows; a heat dissipation duct that houses the heat dissipator and has an upper opening and a lower opening; a restricting member that restricts the flow of air between the upper opening and the lower opening via the outside of the heat dissipation duct in the accommodation chamber of the stationary inductor and the heat dissipation duct, Static induction unit.

2. The restricting member is a connecting duct that connects the upper opening and an upper ventilation port of the storage chamber.

2. The stationary inductor unit of claim 1.

3. The restricting member is a closing plate that divides the interior of the storage chamber into an upper chamber including the upper opening and the upper ventilation port of the storage chamber and a lower chamber including the lower opening and the lower ventilation port of the storage chamber.

2. The stationary inductor unit of claim 1.

4. a partition wall that divides the interior of the accommodation chamber into a first chamber including the heat dissipation duct and a second chamber including the stationary inductor; A stationary inductor unit according to any one of claims 1 to 3.

5. a blower that blows air from the lower opening to the inside of the heat dissipation duct; A stationary inductor unit according to any one of claims 1 to 4.

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