WO2015182199A1 - モールド形静止誘導機器およびモールド形静止誘導機器の製造方法 - Google Patents
モールド形静止誘導機器およびモールド形静止誘導機器の製造方法 Download PDFInfo
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- WO2015182199A1 WO2015182199A1 PCT/JP2015/055847 JP2015055847W WO2015182199A1 WO 2015182199 A1 WO2015182199 A1 WO 2015182199A1 JP 2015055847 W JP2015055847 W JP 2015055847W WO 2015182199 A1 WO2015182199 A1 WO 2015182199A1
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- air
- winding
- induction device
- blower
- static induction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/025—Constructional details relating to cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/10—Single-phase transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
Definitions
- Embodiments of the present invention relate to a molded static induction device and a method for manufacturing a molded static induction device.
- Transformers which are static induction devices used in power systems and substations, are: 1: liquid-cooled transformers that use insulating oil or liquid silicone, 2: gas insulation that relies on an inert gas such as SF 6 for insulation and cooling Transformers, 3: They are roughly divided into dry transformers in which the iron core and windings are used in the air.
- IEC International Electrotechnical Commission
- JEC Electro Society Investigation Committee of Electrical Engineering
- the specified transformer is defined as a molded transformer.
- transformers have been increasingly demanded for environmental compatibility, incombustibility and flame retardancy. For this reason, demand for dry-type transformers is increasing in place of gas-insulated transformers that use an inert gas such as SF 6 which is a kind of global warming gas, and liquid-cooled transformers that require labor on site. .
- molded transformers can be improved in insulation performance compared to other dry transformers by making the insulation function dependent on the resin layer applied to the windings. .
- the conventional mold transformer has a limit of 33 kV class in Japan, and 77 kV class excluding special cases overseas such as Europe and America.
- JP 2003-142318 A Japanese Patent Laid-Open No. 10-189348
- a mold-type static induction device that can be applied to a higher voltage and is suitable for increasing the capacity and a method for manufacturing the mold-type static induction device are provided.
- the mold-type static induction device of the embodiment includes a winding whose surface is covered with a resin or an insulating material containing a resin, a sealed container that contains the winding inside and encloses air at a pressure exceeding atmospheric pressure. And a heat exchanger for cooling the air in the sealed container.
- FIG. 1 equivalent diagram according to the second embodiment It shows a blower, (a) is a front view, (b) is a broken side view. Longitudinal sectional view near the blower in the third embodiment
- FIG. 1 shows a schematic configuration of a molded transformer 1 that is a molded static induction device.
- the molded transformer 1 includes a molded transformer content 2, a sealed container 3, and a heat exchanger 4.
- the content of the molded transformer 2 constitutes the content of the molded static induction device.
- the hermetic container 3 contains the molded transformer contents 2.
- the heat exchanger 4 is provided on the outer side surface (left and right in the figure) of the sealed container 3.
- the molded transformer content 2 is configured by combining a winding 5 and an iron core 6.
- the surface of the winding 5 is covered with resin or an insulating material containing resin.
- the winding 5 has a low-voltage winding 5a and a high-voltage winding 5b.
- the low voltage winding 5 a is mounted on the outer periphery of the iron core 6.
- the high voltage winding 5b is disposed on the outer periphery of the low voltage winding 5a.
- FIG. 2 shows a cross-sectional view of the molded transformer contents 2.
- the molded transformer content 2 has a wave-shaped spacer 5c.
- the spacer 5c is provided between the low voltage winding 5a and the high voltage winding 5b.
- the spacer 5c ensures a predetermined gap 5d between the low-voltage winding 5a and the high-voltage winding 5b, and also ensures the required insulation strength.
- the spacer 5c is an example of a corrugated duct, but may be any configuration that secures the gap 5d.
- the hermetically sealed container 3 encloses air 7 in a state in which the mold transformer contents 2 are accommodated therein.
- the air 7 is air having a pressure exceeding the atmospheric pressure.
- the mold transformer 1 includes an upper connection duct 8 and a lower connection duct 9.
- the upper connection duct 8 and the lower connection duct 9 connect the sealed container 3 and the left and right heat exchangers 4 respectively.
- the upper connection duct 8 is connected to the upper part of the sealed container 3, and the lower connection duct 9 is connected to the lower part of the sealed container 3.
- the sealed container 3 has a partition plate 10.
- the partition plate 10 is provided above the lower connection duct 9 and below the upper connection duct 8 in the sealed container 3.
- the partition plate 10 is fixed to the inner surface of the sealed container 3.
- the partition plate 10 has a flow hole 10a.
- the circulation hole 10 a is a circular hole along the outer periphery of the winding 5, and is formed in a portion adjacent to the outer periphery of the winding 5 of the partition plate 10.
- the content of the mold transformer 2 when the operation of the mold transformer 1 starts, the content of the mold transformer 2 generates heat. And with the heat_generation
- a part of the air 7 circulating in the sealed container 3 passes through a gap between the flow hole 10 a of the partition plate 10 and the outer peripheral portion of the winding 5. At this time, the air 7 passing through the gap between the circulation hole 10a and the outer periphery of the winding 5 cools the winding 5 from the outer periphery. At this time, since the air 7 that circulates around the outer periphery of the winding 5 circulates in a place close to the winding 5, it is possible to enhance the cooling effect. Further, a gap 5d between the low voltage winding 5a and the high voltage winding 5b of the winding 5 is formed by a spacer 5c. For this reason, a part of the air 7 circulating in the sealed container 3 also enters the gap 5d of the winding 5 to cool the winding 5 from the inside. Thereby, the cooling effect of the winding 5 can be further enhanced.
- the dielectric strength of air is almost proportional to the absolute pressure of the air. Therefore, air with a gauge pressure of 1 atmosphere (absolute pressure of 2 atmospheres) has a dielectric strength almost twice that of air with an atmospheric pressure (absolute pressure of 1 atmosphere).
- the heat transfer capacity of the gas increases as the density increases. Therefore, air with a gauge pressure of 1 atm (absolute pressure of 2 atm) has a cooling capacity approximately twice that of air with an atmospheric pressure (1 atm of absolute pressure) in a state where the flow rate is kept constant.
- the mold transformer contents 2 are accommodated in the hermetic container 3.
- air 7 having a pressure exceeding the atmospheric pressure is enclosed.
- the insulation withstand voltage of the air 7 involved in the insulation between the high-voltage winding 5b and the low-voltage winding 5a of the winding 5 and the insulation between the member 6 at the ground potential such as the iron core 6 and the winding 5 is improved. Can be made.
- the withstand voltage of the molded transformer content 2 alone is set to be equal to or higher than the standard operating voltage (regular voltage). Further, the overall withstand voltage when the air 7 having a pressure exceeding the atmospheric pressure is stored in the sealed container 3 is set to be equal to or higher than a test voltage (commercial frequency voltage, impulse voltage, etc.) defined by standards and the like. By setting the withstand voltage in this way, even when air is discharged from the hermetic container 3, it can be operated relatively safely during normal times.
- the withstand voltage of the molded transformer contents 2 alone is set to the standard operating voltage or higher.
- the withstand voltage when the atmospheric pressure air 7 is stored in the sealed container 3 is higher than the standard operating voltage. The same effect can be obtained by setting as above.
- the molded transformer 1 includes a heat exchanger 4 for increasing the density of the air 7 in the hermetic container 3 and cooling the air 7. Therefore, the cooling performance in the sealed container 3 is improved. As a result, it is possible to provide a molded transformer 1 having a higher voltage and a larger capacity that exceeds the upper limit of the voltage and capacity of a conventional mold transformer that has relied on air at atmospheric pressure for its insulating function and cooling function. It becomes possible.
- the mold transformer 1 of the above-described embodiment is shipped after replacing the air 7 in the sealed container 3 with another fresh air 7 after performing the dielectric strength test.
- the air is localized and limited in lightning impulse tests, for example, according to the standards such as IEC and JEC. It is allowed to cause dielectric breakdown and partial discharge.
- an extremely small amount of decomposed gas may be generated from nearby insulators due to ozone or heat generation events that accompany the partial discharge.
- electrical equipment with an insulating medium sealed in a sealed container the internal insulation medium is extracted from the electrical equipment, and the gas contained in the extract is analyzed by gas chromatography to detect abnormalities in the electrical equipment. Or diagnosis of deterioration of electrical equipment.
- the air 7 in the sealed container 3 is replaced with another fresh air 7 after carrying out the dielectric strength test as described above and shipped. According to this, by performing the above-described analysis at the shipping destination, it is possible to detect the abnormality of the device or diagnose the deterioration state more accurately.
- the gas enclosed in the sealed container 3 is air, unlike the SF 6 gas which is a kind of global warming gas, it is released into the atmosphere without requiring a special recovery operation. It is possible. Therefore, the work required for the replacement of the gas (air) in the sealed container 3 is easy.
- the mold transformer 11 of the second embodiment includes a blower 12.
- the blower 12 is provided in the lower connection duct 9. As shown in FIG. 5, the blower 12 includes a plurality of, for example, three blower blades 13, a fan motor 14 that rotationally drives the blower blades 13, and a frame 15 that supports the fan motor 14. .
- the cooling efficiency can be further improved by providing the partition plate 10 as shown in FIG.
- the direction of the blower blades 13 of the blower 12 can be switched between a blower position state shown in FIG. 5 and a flow resistance lowered position state (not shown).
- a blower position state shown in FIG. 5 When the direction of the blowing blades 13 is the blowing position state shown in FIG. 5, each blowing blade 13 faces substantially in front and is inclined slightly obliquely with respect to the blowing direction (see arrow B in FIG. 5B). It is in a state.
- the blower 12 exerts a blowing action to force the air in the sealed container 3 to flow in the arrow direction.
- each of the blower blades 13 is approximately in the direction of arrow C in FIG. It rotates 90 degrees and is in a state substantially parallel to the arrow B direction which is the blowing direction.
- the flow resistance of the air passing between the air blowing blades 13 is small as compared with the case where the air blowing blades 13 are substantially facing the front. Therefore, when the blower blade 13 is switched to the flow resistance lowered position state while the operation of the blower 12 is stopped, the blower blade in the lower connection duct 9 is compared with the case where the blower blade 13 is in the blower position state. It is possible to reduce the flow resistance of air that naturally flows in the vicinity of 13.
- each of the blower blades 13 is moved forward or rearward so that the tip end portion thereof falls on the rotation axis side of the fan motor 14 that is the rotation center of the blower blades 13. It is also possible to rotate backward. Note that switching between the blowing position state and the flow resistance lowering position state of the blowing blade 13 is performed by an operator from the outside by a switch operation or a manual operation.
- the molded transformer 11 of the second embodiment is also shipped after replacing the air 7 in the sealed container 3 with another fresh air 7 after carrying out the dielectric strength test. Is preferred.
- the mold transformer 11 of the third embodiment includes an opening / closing member 16.
- the opening / closing member 16 is provided on both sides of the heat exchanger 4 side and the winding 5 side of the blower 12 in the lower connection duct 9 provided with the blower 12.
- the opening / closing member 16 is, for example, a shutter that can move up and down.
- the opening / closing member 16 opens the lower connection duct 9 at an open position indicated by a solid line in FIG. 6 and allows the air flowing through the lower connection duct 9 to flow.
- the opening / closing member 16 closes the lower connection duct 9 at a closed position indicated by a two-dot chain line in FIG. 6 and prevents the flow of air flowing through the lower connection duct 9.
- the opening / closing member 16 is provided on both sides of the heat exchanger 4 side and the winding 5 side with respect to the blower 12, but is not limited thereto. By providing the opening / closing member 16 at least on the winding 5 side, the above-described effects can be obtained.
- the opening / closing member 16 is not limited to a shutter that moves up and down.
- the opening / closing member 16 may be, for example, a disk-shaped member that is rotated about an axis to open and close the lower connection duct 9.
- the mold type static induction device is not limited to a mold transformer, and may be a mold type reactor.
- the molded static induction device of the present embodiment it is possible to provide a molded static induction device that can be applied to a higher voltage and that is also suitable for large capacity.
- 1 is a mold transformer (molded static induction device)
- 2 is a mold transformer content (molded static induction device content)
- 3 is a sealed container
- 4 is a heat exchanger
- 5 is a winding
- 5a is low.
- Voltage winding 5b is a high voltage winding
- 5c is a spacer
- 5d is a gap
- 6 is an iron core
- 7 is air
- 10 is a partition plate
- 10a is a flow hole
- 11 is a mold transformer (molded static induction device)
- 12 is A blower
- 13 is a blower blade
- 14 is a fan motor
- 16 is an opening / closing member.
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- Manufacturing & Machinery (AREA)
- Transformer Cooling (AREA)
- Insulating Of Coils (AREA)
- Coils Of Transformers For General Uses (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
まず、第1実施形態について図1から図3を参照して説明する。図1は、モールド形静止誘導機器であるモールド変圧器1の概略構成を示している。モールド変圧器1は、モールド変圧器中身2と、密閉容器3と、熱交換器4と、を備えている。モールド変圧器中身2は、モールド形静止誘導機器の中身を構成する。密閉容器3は、モールド変圧器中身2を収納している。熱交換器4は、密閉容器3の外側の側面(図中左右)に設けられている。
次に第2実施形態について図4および図5を参照して説明する。第2実施形態のモールド変圧器11は、送風機12を備えている。送風機12は、下部接続ダクト9内に設けられている。送風機12は、図5に示すように、複数枚例えば3枚の送風羽根13と、この送風羽根13を回転駆動するファンモータ14と、このファンモータ14を支持するフレーム15と、を備えている。
次に第3実施形態について、図6を参照して説明する。第3実施形態は、第2実施形態とは次の点が異なっている。すなわち、第3実施形態のモールド変圧器11は、開閉部材16を備えている。開閉部材16は、送風機12が設けられた下部接続ダクト9において、送風機12に対して熱交換器4側および巻線5側の両側に設けられている。開閉部材16は、例えば上下動可能なシャッターである。開閉部材16は、図6に実線で示す開放位置で下部接続ダクト9を開放して、下部接続ダクト9を流通する空気の流動を許容する。一方、開閉部材16は、図6に二点鎖線で示す閉鎖位置で下部接続ダクト9を閉鎖して、下部接続ダクト9を流通する空気の流動を阻止する。
また、開閉部材16は、上下動するシャッターに限られない。開閉部材16は、例えば軸を中心に回動されて下部接続ダクト9を開閉する円盤状の部材であってもよい。
モールド形静止誘導機器としては、モールド変圧器に限られず、モールド形リアクトルでもよい。
Claims (7)
- 表面が樹脂または樹脂を含んだ絶縁材に覆われた巻線と、
内部に前記巻線を収納し、大気圧を上回る圧力の空気を封入する密閉容器と、
前記密閉容器内の空気を冷却する熱交換器と、を備えるモールド形静止誘導機器。 - 前記巻線は低圧巻線と高圧巻線との間に空隙を形成するスペーサを有する請求項1記載のモールド形静止誘導機器。
- 前記巻線の外周部と前記密閉容器の内面との間に設けられた仕切板を更に備え、
前記仕切板は、前記巻線に隣接する箇所に位置し前記密閉容器内の空気を流通可能な流通孔を有している請求項1または2記載のモールド形静止誘導機器。 - 大気圧の空気が密閉された前記密閉容器内に前記巻線を備えたモールド形静止誘導機器中身を収納する場合の絶縁耐圧が標準使用電圧以上である請求項1から3のいずれか一項記載のモールド形静止誘導機器。
- 前記密閉容器内の空気を循環させる送風機を更に備える請求項1から4のいずれか一項記載のモールド形静止誘導機器。
- 前記送風機が有する送風羽根の向きは、前記送風機の運転時に前記送風羽根の回転に伴い送風作用を発揮する送風位置状態と、前記送風機の運転停止時に前記送風羽根付近を自然流動する空気の流動抵抗を下げる流動抵抗低下位置状態と、に切り替え可能である請求項5記載のモールド形静止誘導機器。
- 請求項1から請求項6のいずれか一項に記載のモールド形静止誘導機器は、前記モールド形静止誘導機器の絶縁耐圧試験を実施後に前記密閉容器内の空気を別の新鮮な空気と置換した後、出荷するモールド形静止誘導機器の製造方法。
Priority Applications (4)
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BR112016027304-4A BR112016027304B1 (pt) | 2014-05-26 | 2015-02-27 | Aparelho de indução estacionário moldado e método para fabricação do aparelho de indução estacionário moldado |
EP15799757.8A EP3151254B1 (en) | 2014-05-26 | 2015-02-27 | Molded stationary induction apparatus and method for manufacturing molded stationary induction apparatus |
US15/313,451 US10026541B2 (en) | 2014-05-26 | 2015-02-27 | Molded stationary induction apparatus and method for manufacturing molded stationary induction apparatus |
CN201580027105.9A CN106575565B (zh) | 2014-05-26 | 2015-02-27 | 模制静止感应设备以及模制静止感应设备的制造方法 |
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JP2014108236A JP6416504B2 (ja) | 2014-05-26 | 2014-05-26 | モールド形静止誘導機器およびその製造方法 |
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CN112967879B (zh) * | 2021-02-01 | 2022-12-06 | 新昌县新明实业有限公司 | 一种变压器绝缘材料电瓷成型加工工艺 |
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BR112016027304A8 (pt) | 2021-05-25 |
CN106575565B (zh) | 2019-03-08 |
JP6416504B2 (ja) | 2018-10-31 |
BR112016027304B1 (pt) | 2022-06-21 |
CN106575565A (zh) | 2017-04-19 |
EP3151254A1 (en) | 2017-04-05 |
BR112016027304A2 (pt) | 2017-08-15 |
US20170186530A1 (en) | 2017-06-29 |
EP3151254B1 (en) | 2021-03-24 |
EP3151254A4 (en) | 2018-01-24 |
JP2015225894A (ja) | 2015-12-14 |
US10026541B2 (en) | 2018-07-17 |
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