JP4875231B2 - Transformer - Google Patents

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Publication number
JP4875231B2
JP4875231B2 JP02313799A JP2313799A JP4875231B2 JP 4875231 B2 JP4875231 B2 JP 4875231B2 JP 02313799 A JP02313799 A JP 02313799A JP 2313799 A JP2313799 A JP 2313799A JP 4875231 B2 JP4875231 B2 JP 4875231B2
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JP
Japan
Prior art keywords
transformer
body case
main body
bushing
filled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP02313799A
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Japanese (ja)
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JP2000223322A (en
Inventor
信幸 瀬間
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
SWCC Showa Cable Systems Co Ltd
Original Assignee
Toshiba Corp
SWCC Showa Cable Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, SWCC Showa Cable Systems Co Ltd filed Critical Toshiba Corp
Priority to JP02313799A priority Critical patent/JP4875231B2/en
Publication of JP2000223322A publication Critical patent/JP2000223322A/en
Application granted granted Critical
Publication of JP4875231B2 publication Critical patent/JP4875231B2/en
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Expired - Fee Related legal-status Critical Current

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  • Transformer Cooling (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、変電所などで使用される変圧器に関するものであり、特に、巻線及び鉄心等を収容した変圧器本体ケース内に絶縁媒体としての油及び六フッ化イオウ(SF6)ガスのような不活性ガスを封入した変圧器に関するものである。
【0002】
【従来の技術】
従来、変圧器は、種々の構造のものが使用されているが、例えば変電所で降圧のために使用される変圧器においては、巻線及び鉄心等の変圧器構成部品を絶縁し、又、直接冷却するために、これらを密封タンクとされる変圧器本体ケース内に納め、ケース内には油を封入した構造のものがある。その一例を図3に示す。
【0003】
本例によると、変圧器100は、変圧器本体ケース101を有し、その中に巻線及び鉄心等の変圧器構成部品102が収納されている。変圧器本体ケース101内には、絶縁媒体として油103が充填され、ケース101の上部空間部には、油103が空気と接触して劣化するのを防止するために、不活性ガス、例えば六フッ化イオウ(SF 6 )ガス104が充満されている。この六フッ化イオウ(SF 6 )ガス104を充満したケース101の上部空間部は、管106により、ケース上壁外面101Aに設置したコンサベータ105と連通されている。
【0004】
変圧器本体ケース101内の油103は、周囲温度及び負荷の変化に伴い、その温度が変化し、従って、その容積が膨張、収縮して変動するが、このような油103の膨張、収縮は、六フッ化イオウ(SF6)ガス104を貯留したコンサベータ105により吸収される。
【0005】
又、ケース101の上壁外面101Aには、高圧ブッシング1が取り付けられており、低圧ブッシング107は、例えばケース101の側壁面101Bに設置されている。
【0006】
斯かる変圧器100に使用されている高圧ブッシング、即ち、T形ブッシング1は、内部にT形状の接続導体3を一体に成型した、通常エポキシ樹脂で作製されたT形ブッシングモールド2を有し、支持金具4にて変圧器本体ケース101に固定される。
【0007】
T形ブッシングモールド2の水平部2Aには、本例では図面右側には高圧側ケーブル30の通電接続部、即ち、ケーブル接続材料(オス側)31が装着され、又、他方側(図面左側)には絶縁栓50が装着されている。
【0008】
変圧器本体ケース101内にて、高圧ブッシング1の接続端子6は、ケース内にて変圧器入力端子108に接続される。又、低圧ブッシング107の接続端子109は、変圧器の出力端子110に接続される。
【0009】
更に、上記構成の従来の変圧器100は、高圧ブッシング1に隣接して変流器200が設置されており、送電ケーブル30に流れる電流を計測して送電状態を常時監視している。
【0010】
【発明が解決しようとする課題】
上述のように構成された従来の変圧器100は、変圧器本体ケース101の上部に、コンサベータ105、変流器200などが設置されており、変圧器100の大型化の一因となっており、小型化が望まれていた。
【0011】
更に、変圧器100に送電ケーブル30を接続する作業においては、高圧ブッシング1に接続される送電ケーブル30に変流器200を装着しなければならないといった作業上の煩雑さがあった。
【0012】
従って、本発明の目的は、コンサベータを不要とし、更に、変圧器本体ケース内に変流器を備えており、小型化を達成すると共に、変圧器に送電ケーブルを接続するに際しての作業上の煩雑さをもなくすることのできる変圧器を提供することである。
【0013】
【課題を解決するための手段】
上記目的は本発明に係る変圧器にて達成される。要約すれば、本発明によれば、高圧側ケーブルの接続材料が水平部に装着され、首長垂直モールド部を有し、かつ前記首長垂直モールド部の下方位置にベルマウス部を有する、モールド部表面に導電塗料が塗布されたT形の高圧ブッシングを、変圧器本体ケースの上壁外面に設置し、前記変圧器本体ケース内の絶縁媒体は、その油面が、前記ベルマウス部の下方位置より上方の位置とされるまで充満され、前記変圧器本体ケース内の上部空間部には、不活性ガスが充満され、前記首長垂直モールド部の前記上部空間部に位置する部分には変流器を設置したことを特徴とする変圧器が提供される。
【0015】
【発明の実施の形態】
以下、本発明に係る変圧器を図面に則して更に詳しく説明する。
【0016】
図1に本発明の変圧器100の一実施例を示す。本実施例によると、従来と同様に、変圧器100は、密封された変圧器本体ケース101を有し、その中に巻線及び鉄心等の変圧器構成部品102が収納されている。変圧器本体ケース101内には、絶縁媒体としての油103が充填され、ケース101の上部空間部には、油103が空気と接触して劣化するのを防止するために、不活性ガス、例えば六フッ化イオウ(SF6)ガス104が充満されている。
【0017】
本発明の変圧器100によれば、ケース101の上壁外面101Aには、高圧ブッシング1が取り付けられているが、従来、ケース上壁外面101Aに設置されていたコンサベータ105(図3)は設けられていない。低圧ブッシング107は、例えば、ケース101の側壁面101Bに設置されている。
【0018】
本発明に使用される高圧ブッシング、即ち、T形ブッシング1の一実施例を図2をも参照して説明する。
【0019】
T形ブッシング1は、内部にT形状の接続導体3を一体に成型した、通常エポキシ樹脂で作製されたT形ブッシングモールド2を有する。即ち、T形ブッシングモールド2は、スリーブ状の接続導体3Aを一体に成型した水平部2Aと、この接続導体3Aから下方へと垂直に延在した通電導体3Bを内部に一体に成型した垂直部2Bとにて構成される。このT形ブッシングモールド2は、その表面に導電塗料が塗布され、又、支持金具4にて変圧器本体ケース101に固定される。
【0020】
T形ブッシングモールド2の水平部2Aには、本実施例では図面右側には送電ケーブルとされる高圧側ケーブル30の通電接続部、即ち、ケーブル接続材料(オス側)31が装着され、又、他方側(図面左側)には絶縁栓50が装着される。
【0021】
本実施例にて、高圧用ケーブル30のケーブル接続材料(オス側)31は、当業者には周知のプレハブ構造とされ、ケーブル30の先端部に形成された接続端子(プラグ及びマルチラムバンド)32、ストレスコーン33、ケーブル保護金具34、圧縮装置35などの接続部品により、上記ブッシング内接続部のスリーブ状導体3Aに接続される。絶縁栓50は、絶縁棒51、及びこの絶縁棒51の周囲に形成されたストレスコーン52、蓋53、圧縮装置54などの絶縁栓部品によりブッシング1の母線接続端部とは反対側の端部を電気的に封鎖する。絶縁栓50を除去することにより、この接続端部に耐電圧試験ケーブルの接続材料を接続することが可能となる。
【0022】
変圧器本体ケース101内にて、高圧ブッシング1の接続端子6は、変圧器入力端子108に接続され、又、低圧ブッシング107の接続端子109は、変圧器出力端子109に接続される。
【0023】
本発明によれば、T形ブッシングモールド2の垂直部2Bは、従来のものに比較するとその長さが長く、例えば、従来の10倍程度とされる。そして、この首長とされる垂直部2Bに、好ましくは、ケース上壁101Aに近接した領域に位置して、変流器200が設置される。変流器200は、このT形ブッシングモールド2の首長垂直部2B内部の通電導体3Bに流れる電流を計測して送電状態を常時監視することができる。
【0024】
本発明では、変圧器100内に充満される絶縁媒体は、その油面104Aが、T形ブッシングモールド2の首長垂直部2Bの下方位置に形成されたベルマウス部の下方位置より若干上方の位置にまで達するように、変圧器本体ケース101内に充填される。
【0025】
本発明によれば、コンサベータを設けることなく、変圧器本体ケース内の油が周囲温度及び負荷の変化に伴い発生する油の膨張、収縮を六フッ化イオウ(SF6)ガス104を充満したケース上部空間部にて吸収し得る。
【0026】
又、本発明によれば、上述のように、変流器200をケース101内に収め、又、コンサベータ105をなくすことができたので、変圧器全体の大きさを大幅に小型化することができる。
【0027】
更に、変圧器100に送電ケーブル30を接続する作業においても、変流器200は、予め高圧ブッシング1に取り付けられているので、接続された送電ケーブル30に変流器200を装着しなければならないといった作業上の煩雑さも解消される。
【0028】
【発明の効果】
以上説明したように、本発明の変圧器は、高圧側ケーブルの接続材料が水平部に装着され、首長垂直モールド部を有し、かつ前記首長垂直モールド部の下方位置にベルマウス部を有する、モールド部表面に導電塗料が塗布されたT形の高圧ブッシングを、変圧器本体ケースの上壁外面に設置し、前記変圧器本体ケース内の絶縁媒体は、その油面が、前記ベルマウス部の下方位置より上方の位置とされるまで充満され、前記変圧器本体ケース内の上部空間部には、不活性ガスが充満され、前記首長垂直モールド部の前記上部空間部に位置する部分には変流器を設置した構成とされるので、コンサベータを不要とし、更に、変流器は、変圧器本体ケース内に設けられるので、小型化を達成すると共に、変圧器に送電ケーブルを接続するに際しての作業上の煩雑さをもなくすることができる。
【図面の簡単な説明】
【図1】本発明に係る変圧器の一実施例を示す概略構成図である。
【図2】高圧ブッシングの一実施例を示す概略構成図である。
【図3】従来の変圧器の概略構成図である。
【符号の説明】
1 高圧ブッシング
2B 首長垂直モールド部
3 通電導体
30 高圧側ケーブル
31 ケーブル接続材料
101 変圧器本体ケース
103 絶縁媒体(油)
104 不活性ガス
105 コンサベータ
200 変流器
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transformer used in a substation and the like, and in particular, an oil and sulfur hexafluoride (SF 6 ) gas as an insulating medium in a transformer body case containing a winding, an iron core and the like. The present invention relates to a transformer filled with such an inert gas.
[0002]
[Prior art]
Conventionally, transformers having various structures are used. For example, in transformers used for step-down in substations, transformer components such as windings and iron cores are insulated, In order to directly cool, there is a structure in which these are housed in a transformer main body case which is a sealed tank, and oil is sealed in the case. An example is shown in FIG.
[0003]
According to this example, the transformer 100 has a transformer main body case 101 in which a transformer component 102 such as a winding and an iron core is housed. The transformer main body case 101 is filled with oil 103 as an insulating medium, and an upper space of the case 101 is filled with an inert gas, for example, six in order to prevent the oil 103 from deteriorating due to contact with air. The sulfur fluoride (SF 6 ) gas 104 is filled. Upper space part of the sulfur hexafluoride (SF 6) Case 101 filled with gas 104, the tube 106, that have communicated with the conservator 105 was placed on the case on the wall outer surface 101A.
[0004]
The temperature of the oil 103 in the transformer main body case 101 changes with changes in the ambient temperature and load. Therefore, the volume of the oil 103 changes due to expansion and contraction. It is absorbed by a conservator 105 that stores sulfur hexafluoride (SF 6 ) gas 104.
[0005]
The high pressure bushing 1 is attached to the upper wall outer surface 101A of the case 101, and the low pressure bushing 107 is installed on the side wall surface 101B of the case 101, for example.
[0006]
The high-voltage bushing used in such a transformer 100, that is, the T-shaped bushing 1, has a T-shaped bushing mold 2 made of an epoxy resin and integrally formed with a T-shaped connecting conductor 3 therein. The transformer body case 101 is fixed by the support bracket 4.
[0007]
In the horizontal part 2A of the T-shaped bushing mold 2, in this example, a current-carrying connection part of the high-voltage cable 30, that is, a cable connection material (male side) 31 is mounted on the right side of the drawing, and the other side (left side of the drawing). An insulating plug 50 is attached to the.
[0008]
In the transformer main body case 101, the connection terminal 6 of the high voltage bushing 1 is connected to the transformer input terminal 108 in the case. Further, the connection terminal 109 of the low voltage bushing 107 is connected to the output terminal 110 of the transformer.
[0009]
Furthermore, the conventional transformer 100 having the above-described configuration is provided with a current transformer 200 adjacent to the high-voltage bushing 1 and constantly monitors the power transmission state by measuring the current flowing through the power transmission cable 30.
[0010]
[Problems to be solved by the invention]
In the conventional transformer 100 configured as described above, the conservator 105, the current transformer 200, and the like are installed on the upper portion of the transformer body case 101, which contributes to an increase in the size of the transformer 100. Therefore, downsizing was desired.
[0011]
Furthermore, in the operation of connecting the power transmission cable 30 to the transformer 100, there is a work complexity that the current transformer 200 must be attached to the power transmission cable 30 connected to the high voltage bushing 1.
[0012]
Accordingly, an object of the present invention is to eliminate the need for a conservator, and further to provide a current transformer in the transformer main body case, to achieve downsizing and to work in connecting a power transmission cable to the transformer. It is to provide a transformer that can eliminate complexity.
[0013]
[Means for Solving the Problems]
The above objective is accomplished by a transformer according to the present invention. In summary, according to the present invention, is mounted on the horizontal portion connecting material of the high-voltage side cable has a chief vertical mold section, and has a bell mouth portion at a lower position of the heads vertical mold section, the mold part surface A T-shaped high-voltage bushing coated with conductive paint is installed on the outer surface of the upper wall of the transformer body case, and the oil level of the insulating medium in the transformer body case is lower than the position below the bell mouth part. The upper space part in the transformer main body case is filled with an inert gas, and a current transformer is provided in a part located in the upper space part of the neck long vertical mold part. A transformer characterized by the installation is provided.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the transformer according to the present invention will be described in more detail with reference to the drawings.
[0016]
FIG. 1 shows an embodiment of a transformer 100 of the present invention. According to the present embodiment, the transformer 100 has a sealed transformer main body case 101 in which the transformer components 102 such as windings and iron cores are housed in the transformer main body case 101 as in the prior art. The transformer body case 101 is filled with oil 103 as an insulating medium, and the upper space of the case 101 is filled with an inert gas, for example, in order to prevent the oil 103 from deteriorating due to contact with air. A sulfur hexafluoride (SF 6 ) gas 104 is filled.
[0017]
According to the transformer 100 of the present invention, the high voltage bushing 1 is attached to the upper wall outer surface 101A of the case 101, but the conservator 105 (FIG. 3) conventionally installed on the case upper wall outer surface 101A is Not provided. The low-pressure bushing 107 is installed on the side wall surface 101B of the case 101, for example.
[0018]
One embodiment of the high pressure bushing used in the present invention, that is, the T-shaped bushing 1, will be described with reference to FIG.
[0019]
The T-shaped bushing 1 has a T-shaped bushing mold 2 usually made of an epoxy resin, in which a T-shaped connection conductor 3 is integrally molded. That is, the T-shaped bushing mold 2 includes a horizontal portion 2A formed integrally with a sleeve-like connection conductor 3A and a vertical portion formed integrally with a conducting conductor 3B extending vertically downward from the connection conductor 3A. 2B . The T-shaped bushing mold 2 is coated with a conductive paint on the surface thereof, and is fixed to the transformer main body case 101 by the support fitting 4.
[0020]
In the horizontal part 2A of the T-shaped bushing mold 2, a current-carrying connection part of a high-voltage cable 30 that is a power transmission cable, that is, a cable connection material (male side) 31 is mounted on the right side of the drawing. An insulating plug 50 is attached to the other side (left side of the drawing).
[0021]
In this embodiment, the cable connection material (male side) 31 of the high-voltage cable 30 has a prefabricated structure well known to those skilled in the art, and connection terminals (plugs and multi-ram bands) formed at the tip of the cable 30. 32, the stress cone 33, the cable protection metal fitting 34, the compression device 35, and the like are connected to the sleeve-like conductor 3A of the connecting portion in the bushing. The insulating plug 50 includes an insulating rod 51 and an end portion opposite to the bus bar connecting end portion of the bushing 1 by insulating plug components such as a stress cone 52, a lid 53, and a compression device 54 formed around the insulating rod 51. Is electrically sealed. By removing the insulating plug 50, it becomes possible to connect the connection material of the withstand voltage test cable to this connection end.
[0022]
In the transformer main body case 101, the connection terminal 6 of the high voltage bushing 1 is connected to the transformer input terminal 108, and the connection terminal 109 of the low voltage bushing 107 is connected to the transformer output terminal 109.
[0023]
According to the present invention, the length of the vertical portion 2B of the T-shaped bushing mold 2 is longer than that of the conventional one, for example, about 10 times that of the conventional one. Then, the vertical portion 2B which is the chief, preferably, located in an area close to the case upper walls 101A, current transformer 200 is installed. Current transformer 200 can constantly monitor power transmission state the current flowing through the chief vertical portion 2B internal current conductor 3B of the T-shaped bushing mold 2 is measured.
[0024]
In the present invention, the insulating medium is filled into the transformer 100, the oil surface 104A is slightly upper position than the lower position of the bell mouth portion which is formed at a lower position of the heads vertical portion 2B of the T-shaped bushing mold 2 The transformer main body case 101 is filled so that
[0025]
According to the present invention, without providing a conservator, the oil in the transformer body case is filled with sulfur hexafluoride (SF 6 ) gas 104 to expand and contract the oil generated with changes in ambient temperature and load. It can be absorbed in the case upper space.
[0026]
Also, according to the present invention, as described above, the current transformer 200 is housed in the case 101 and the conservator 105 can be eliminated, so that the size of the entire transformer can be greatly reduced. Can do.
[0027]
Furthermore, also in the operation of connecting the power transmission cable 30 to the transformer 100, the current transformer 200 is previously attached to the high-voltage bushing 1, so the current transformer 200 must be attached to the connected power transmission cable 30. Such troublesome work is also eliminated.
[0028]
【Effect of the invention】
As described above, in the transformer of the present invention, the connection material of the high-voltage cable is attached to the horizontal portion, has a neck length vertical mold portion, and has a bell mouth portion below the neck length vertical mold portion . A T-shaped high-pressure bushing having a conductive coating applied on the surface of the mold part is installed on the outer surface of the upper wall of the transformer main body case. The insulating medium in the transformer main body case has an oil level that is the same as that of the bell mouth part. The upper space portion in the transformer body case is filled with an inert gas, and the portion located in the upper space portion of the vertical neck mold portion is changed. Since a current collector is installed, a conservator is not required. Further, since the current transformer is provided in the transformer body case, it is possible to reduce the size and connect the power transmission cable to the transformer. of It can be without the complexity of the work.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an embodiment of a transformer according to the present invention.
FIG. 2 is a schematic configuration diagram showing an embodiment of a high-pressure bushing.
FIG. 3 is a schematic configuration diagram of a conventional transformer.
[Explanation of symbols]
1 high-pressure bushing 2B heads vertical mold section 3 energized conductors 30 high-voltage-side cable 31 cable connection material 101 transformer body case 103 insulating medium (oil)
104 Inert gas 105 Conservator 200 Current transformer

Claims (1)

高圧側ケーブルの接続材料が水平部に装着され、首長垂直モールド部を有し、かつ前記首長垂直モールド部の下方位置にベルマウス部を有する、モールド部表面に導電塗料が塗布されたT形の高圧ブッシングを、変圧器本体ケースの上壁外面に設置し、前記変圧器本体ケース内の絶縁媒体は、その油面が、前記ベルマウス部の下方位置より上方の位置とされるまで充満され、前記変圧器本体ケース内の上部空間部には、不活性ガスが充満され、前記首長垂直モールド部の前記上部空間部に位置する部分には変流器を設置したことを特徴とする変圧器。A high-voltage side cable connecting material is mounted on a horizontal portion, has a neck-long vertical mold portion, and has a bell mouth portion at a position below the neck-length vertical mold portion, and has a T-shaped surface coated with a conductive paint. A high voltage bushing is installed on the outer surface of the upper wall of the transformer main body case, and the insulating medium in the transformer main body case is filled until the oil level is higher than the lower position of the bell mouth portion, The transformer is characterized in that the upper space in the transformer main body case is filled with an inert gas, and a current transformer is installed in a portion of the neck long vertical mold located in the upper space.
JP02313799A 1999-01-29 1999-01-29 Transformer Expired - Fee Related JP4875231B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP02313799A JP4875231B2 (en) 1999-01-29 1999-01-29 Transformer

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KR101650306B1 (en) * 2015-03-25 2016-08-24 주식회사 평일 inlet bushing for metering out fit
CN110211805B (en) * 2019-06-27 2022-03-01 国网河北省电力有限公司沧州供电分公司 Oiling tool for transformer bushing

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