JPH06231636A - Gas insulating bushing - Google Patents
Gas insulating bushingInfo
- Publication number
- JPH06231636A JPH06231636A JP1880493A JP1880493A JPH06231636A JP H06231636 A JPH06231636 A JP H06231636A JP 1880493 A JP1880493 A JP 1880493A JP 1880493 A JP1880493 A JP 1880493A JP H06231636 A JPH06231636 A JP H06231636A
- Authority
- JP
- Japan
- Prior art keywords
- shield
- conductor
- gas
- electric field
- atmosphere
- 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.)
- Granted
Links
Landscapes
- Insulators (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、超超高圧の機器に取り
付けて使用するに適したガス絶縁ブッシングに関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated bushing suitable for being installed and used in equipment of ultra-high pressure.
【０００２】[0002]
【従来の技術】ガス絶縁ブッシングは、図６、図７に示
すように絶縁ガスが充填された磁器製の碍管１の内部に
中心導体２を貫通させたものである。この碍管１は、取
り付けられている機器が運転される間に碍管１の表面に
汚損物が付着して絶縁性能を低下させるおそれがあるた
め、これに対応できる表面漏洩距離を確保する必要があ
る。またガス絶縁ブッシングの絶縁性能を十分に発揮さ
せるには、高電圧部と接地部との間の電界を局部的に集
中させないようにする必要があり、この目的でブッシン
グの頭部に大径の大気側高圧シールド３を取り付けた
り、碍管１の下部に電界調整用のガス中部接地シールド
５、中間電極４、気中部接地シールド６等を配置する対
策が講じられている。2. Description of the Related Art As shown in FIGS. 6 and 7, a gas-insulated bushing is a porcelain porcelain porcelain tube 1 filled with an insulating gas, in which a central conductor 2 is penetrated. In this porcelain bushing 1, there is a possibility that contaminants may adhere to the surface of the porcelain bushing 1 while the attached equipment is operated, and the insulation performance may be deteriorated. Therefore, it is necessary to secure a surface leakage distance that can cope with this. . In addition, in order to fully demonstrate the insulation performance of the gas-insulated bushing, it is necessary not to locally concentrate the electric field between the high-voltage section and the ground section. Measures are taken such that the atmosphere-side high-pressure shield 3 is attached, or the gas middle grounding shield 5, the intermediate electrode 4, the air middle grounding shield 6 and the like for electric field adjustment are arranged below the porcelain insulator 1.
【０００３】ところが、超超高圧の機器に使用されるガ
ス絶縁ブッシングは、常規使用電圧が高いだけではなく
通電電流も5000〜10000 Ａと大きく、碍管１の径が小さ
くなっている上方部分（大気側の部分）の絶縁ガスの対
流が抑制され、同部に熱がこもり易いという問題があっ
た。また系統に接続されている開閉機器を動作させると
常規使用電圧の２〜2.5 倍の開閉サージ電圧が発生する
現象が生じ、電界が集中し易い大気側高圧シールド３の
下端部で放電が発生するおそれがあり、特に降雨時には
大気側高圧シールド３の下端部から水滴が垂れ下がるた
めに不規則な放電や閃絡を生じ易いという問題があっ
た。However, in the gas-insulated bushing used for ultra-high pressure equipment, not only the normal operating voltage is high but also the energizing current is as large as 5000 to 10000 A, and the diameter of the porcelain insulator 1 is small (atmosphere). There is a problem that convection of the insulating gas in the side portion) is suppressed, and heat is easily accumulated in the same portion. When the switchgear connected to the system is operated, a switching surge voltage of 2 to 2.5 times the normal operating voltage occurs, and a discharge is generated at the lower end of the atmosphere-side high-voltage shield 3 where the electric field tends to concentrate. There is a possibility that irregular discharges or flashovers are likely to occur because water drops hang down from the lower end of the atmosphere-side high-pressure shield 3 especially during rainfall.
【０００４】更に超超高圧の機器に使用されるガス絶縁
ブッシングでは中心導体２の全長が十数ｍに達してその
製造が容易ではないうえに、地震襲来時には十数ｍに達
する中心導体２が大きく振動してその固定端部に大きい
曲げ応力が発生し、これに耐え得るようにするには全体
を更に肉厚化したり大型化する必要があるという問題も
あった。Furthermore, in the gas-insulated bushing used for ultra-high pressure equipment, the total length of the central conductor 2 reaches ten and several meters, which is not easy to manufacture. There is also a problem that a large bending stress is generated at the fixed end portion due to a large vibration, and it is necessary to further increase the thickness or increase the size in order to withstand this.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決して、大気側の部分に熱がこもることが
なく、降雨時にも放電、閃絡を生ずることがなく、また
地震襲来時における中心導体の振動及び発生応力を抑制
することができる超超高圧の機器に適したガス絶縁ブッ
シングを提供するために完成されたものである。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art so that no heat is trapped in the atmosphere side portion, no discharge or flashover occurs even during rainfall, and an earthquake occurs. The present invention has been completed to provide a gas-insulated bushing suitable for an ultra-high-voltage device capable of suppressing the vibration and generated stress of the central conductor during an attack.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、碍管の内部を貫通する中心導体
を、主通電部とその大気側の部分に接続された、主通電
部よりも径の太い接続導体とからなるものとするととも
に、この接続部の周囲に、この接続部と大気側高圧シー
ルド下端部との電界を調整するシールドを取り付けたこ
とを特徴とするものである。なお、接続導体の内部に熱
伝達促進手段を設けることが好ましい。SUMMARY OF THE INVENTION The present invention, which has been made to solve the above-mentioned problems, has a main conducting portion in which a central conductor penetrating the inside of a porcelain insulator is connected to the main conducting portion and its atmosphere side portion. And a shield for adjusting the electric field between the connection part and the lower end of the atmosphere-side high-voltage shield is attached to the periphery of the connection part. . In addition, it is preferable to provide a heat transfer promoting means inside the connection conductor.
【０００７】[0007]
【作用】本発明のガス絶縁ブッシングは、碍管の内部を
貫通する中心導体の大気側の部分を主通電部よりも径の
太い接続導体からなるものとしたので、この部分におけ
る通電による発熱が緩和されるとともに放熱性が向上
し、特に接続導体の内部にヒートパイプのような熱伝達
促進手段を設ければ、通電発熱による温度上昇を確実に
抑制することができる。また本発明のガス絶縁ブッシン
グは、この接続導体を主通電部と分離して製造できるの
で、従来のような一体型の中心導体よりも製造が容易と
なるうえ、接続導体を太径としたため地震襲来時等に最
大の曲げ応力が発生する中心導体上端の断面係数を大き
くすることができ、発生応力を低減することができる。In the gas-insulated bushing of the present invention, the portion of the central conductor that penetrates the inside of the porcelain tube on the atmosphere side is made of a connecting conductor having a diameter larger than that of the main conducting portion. In addition, the heat dissipation is improved, and in particular, if a heat transfer promoting means such as a heat pipe is provided inside the connection conductor, it is possible to reliably suppress the temperature rise due to heat generation by energization. Further, since the gas-insulated bushing of the present invention can be manufactured by separating this connection conductor from the main current-carrying part, the gas-insulated bushing is easier to manufacture than the conventional integral type center conductor, and since the connection conductor has a large diameter, the earthquake It is possible to increase the section modulus of the upper end of the center conductor where the maximum bending stress occurs at the time of an attack or the like, and to reduce the generated stress.
【０００８】更に本発明のガス絶縁ブッシングは、接続
部の周囲に電界調整用シールドを取り付けたので、大気
側高圧シールドの表面の最大電位傾度の位置を大気側高
圧シールドの下端部よりも上方へ移動させることがで
き、降雨時に水滴が生じてもその影響を受けないように
することができる。このため、前記したような降雨時に
おける不規則な放電、閃絡を防止することができる。Further, in the gas-insulated bushing of the present invention, since the electric field adjusting shield is attached around the connecting portion, the position of the maximum potential gradient on the surface of the atmosphere-side high-voltage shield is set higher than the lower end of the atmosphere-side high-voltage shield. It can be moved so that it will not be affected even if water drops occur during rainfall. Therefore, it is possible to prevent the irregular discharge and flashover at the time of rainfall as described above.
【０００９】[0009]
【実施例】以下に本発明を図１〜図５に示す実施例によ
り、更に詳細に説明する。図１において、１は内部に絶
縁ガスが充填された磁器製の碍管、２は碍管１の内部を
貫通する中心導体、３はブッシングの頭部の気中ターミ
ナル７の周囲に形成された大気側高圧シールド、５は碍
管１の下部内側に設けられたガス中部接地シールド、４
は中間電極、６は碍管１の下部外側に設けられた気中部
接地シールド６である。以上の構成は従来のこの種のガ
ス絶縁ブッシングと基本的に同じである。EXAMPLES The present invention will be described in more detail with reference to the examples shown in FIGS. In FIG. 1, 1 is a porcelain porcelain tube with an insulating gas filled inside, 2 is a central conductor penetrating the inside of the porcelain tube 1, and 3 is the atmosphere side formed around the air terminal 7 at the head of the bushing. High-voltage shield, 5 is a gas middle grounding shield provided inside the lower part of the porcelain insulator 1, 4
Is an intermediate electrode, and 6 is an aerial part grounding shield 6 provided outside the lower part of the porcelain insulator 1. The above structure is basically the same as that of the conventional gas-insulated bushing of this type.
【００１０】しかし本発明においては中心導体２が一体
のものではなく、主通電部2aの大気側の部分に主通電部
2aよりも径の太い接続導体８を接続した構造とされてい
る。中心導体２の全長が13〜15ｍの場合、接続導体８の
長さは２〜５ｍ程度が適当である。このように中心導体
２を分割型としたことにより、製造が容易となるうえ
に、中心導体２の端部の接続導体８の断面係数を大きく
できるため、地震襲来時の振動に対しても発生応力が小
さくなり、信頼性を向上させることができる。また径の
太い接続導体８は中心導体２の振動を抑制できる効果が
あるので、中心導体２と中間電極４との間隙の変化を低
減し、絶縁面での信頼性を向上させることもできる。However, in the present invention, the central conductor 2 is not integrated, but the main conducting portion 2a is provided on the atmosphere side portion of the main conducting portion 2a.
It has a structure in which a connecting conductor 8 having a diameter larger than 2a is connected. When the total length of the central conductor 2 is 13 to 15 m, the length of the connecting conductor 8 is preferably about 2 to 5 m. Since the center conductor 2 is of the split type as described above, it is easy to manufacture and the section modulus of the connection conductor 8 at the end of the center conductor 2 can be increased, so that it is generated against vibration during an earthquake. Stress is reduced and reliability can be improved. Further, since the connecting conductor 8 having a large diameter has the effect of suppressing the vibration of the central conductor 2, it is possible to reduce the change in the gap between the central conductor 2 and the intermediate electrode 4 and improve the reliability of the insulating surface.
【００１１】また本発明では、主通電部2aと接続導体８
との接続部の周囲に、接続導体８と同電位の電界調整用
シールド９を取り付けてある。この電界調整用シールド
９は接続部をシールドするとともに、図２に示すように
大気側高圧シールド３の表面に沿う等電位線を外側へ移
動させることにより、従来は大気側高圧シールド３の下
端部（E1またはE2の点）にあった最大電位傾度の位置を
上方（E3の点）へ動かす効果がある。このため、従来は
図３のように降雨時にE2の点から水滴が垂れ下がると開
閉サージ電圧による放電、閃絡が生じ易かったのである
が、本発明では大気側高圧シールド３の下端部の電位傾
度が緩和され、降雨時にも開閉サージ電圧による放電、
閃絡が生じにくくなる。Further, in the present invention, the main conducting portion 2a and the connecting conductor 8 are
An electric field adjusting shield 9 having the same electric potential as the connecting conductor 8 is attached around the connection portion with. The electric field adjusting shield 9 shields the connection portion and moves the equipotential line along the surface of the atmosphere-side high-voltage shield 3 to the outside as shown in FIG. It has the effect of moving the position of the maximum potential gradient that was at (points E 1 or E 2 ) upward (point E 3 ). Therefore, conventionally, when water drops droop from the point of E 2 during rainfall as shown in FIG. 3, discharge and flashover due to the switching surge voltage were likely to occur. The gradient is alleviated, and even when it is raining, discharge due to the switching surge voltage,
Flashover is less likely to occur.
【００１２】なお、上記の効果を得るためには、電界調
整用シールド９の径寸法は実用的には主通電部2aの径寸
法の1.2 〜２倍とする。またこの電界調整用シールド９
の下端部と大気側高圧シールド３の下端部との共通接線
が、中心導体２の中心線に対してなす角度が10〜25°の
範囲にあるようにすることが好ましい。これよりも角度
が小さくなると図２のE1及びE2の点の電位傾度を緩和す
る効果が少なく、逆にこの角度を越えるとE3の点の点の
電位傾度を緩和する効果が少なくなる。これらの条件を
満足させるように電界調整用シールド９を取り付けれ
ば、各部の電位傾度を10〜30％低減させることができ
る。In order to obtain the above effect, the diameter of the electric field adjusting shield 9 is practically 1.2 to 2 times the diameter of the main conducting portion 2a. Also, this electric field adjustment shield 9
It is preferable that the common tangent line between the lower end of the core and the lower end of the atmosphere-side high-voltage shield 3 forms an angle with the center line of the central conductor 2 in the range of 10 to 25 °. If the angle is smaller than this, the effect of reducing the potential gradient at the points E 1 and E 2 in FIG. 2 is small, and conversely, if the angle is exceeded, the effect of reducing the potential gradient at the point E 3 is small. . If the electric field adjusting shield 9 is attached so as to satisfy these conditions, the potential gradient of each part can be reduced by 10 to 30%.
【００１３】中心導体２の主通電部2a及び接続導体８は
熱伝導率の大きい銅、アルミニウム及びそれらの合金か
らなるものとすることが好ましい。接続導体８は中実体
であってもよいが、図４に示すように中空体とし、その
内部にヒートパイプのような熱伝達促進手段10を設ける
ことにより主通電部2a及び接続導体８の熱をより速やか
に外部へ逃がすことができる。（図５に熱伝達促進手段
10のみの外観を示す）この場合、主通電部2a及び接続導
体８に通気孔11を設けておくことが好ましい。このよう
に太径化した接続導体８の内部空間を有効に利用して通
電発熱を強制的に放熱させれば、ブッシングの熱的信頼
性を一層向上させることができることとなる。The main conducting portion 2a of the central conductor 2 and the connecting conductor 8 are preferably made of copper, aluminum and their alloys, which have high thermal conductivity. The connection conductor 8 may be a solid body, but as shown in FIG. 4, a hollow body is provided, and a heat transfer promoting means 10 such as a heat pipe is provided in the hollow body to heat the main conducting portion 2a and the connection conductor 8. Can be released to the outside more quickly. (See FIG. 5 for heat transfer promoting means.
In this case, it is preferable to provide ventilation holes 11 in the main conducting portion 2a and the connecting conductor 8. By effectively utilizing the internal space of the connection conductor 8 having such a large diameter to forcibly dissipate the energized heat generation, the thermal reliability of the bushing can be further improved.
【００１４】[0014]
【発明の効果】以上に説明したように本発明のガス絶縁
ブッシングは、中心導体を主通電部とその大気側の部分
に接続された径の太い接続導体とからなるものとしたの
で、ブッシングの大気側の部分に熱がこもることがな
く、地震襲来時における中心導体の振動を抑制すること
もできる。また本発明のガス絶縁ブッシングは、接続部
の周囲に電界調整用シールドを取り付けたので、降雨時
にも開閉サージ電圧による放電、閃絡を生ずることがな
い。よって本発明は超超高圧の機器に適したガス絶縁ブ
ッシングとして、産業の発展に寄与するところは極めて
大である。As described above, in the gas-insulated bushing of the present invention, the central conductor is composed of the main current-carrying portion and the connecting conductor having a large diameter connected to the atmosphere side portion thereof. No heat is trapped in the atmosphere side portion, and it is possible to suppress vibration of the central conductor when an earthquake strikes. Further, in the gas-insulated bushing of the present invention, since the electric field adjusting shield is attached around the connection portion, discharge or flashover due to the switching surge voltage does not occur even during rainfall. Therefore, the present invention, as a gas-insulated bushing suitable for ultra-high pressure equipment, has a great contribution to the development of industry.
【図１】本発明の実施例を示す中央縦断面図である。FIG. 1 is a central longitudinal sectional view showing an embodiment of the present invention.
【図２】実施例のガス絶縁ブッシングの電界調整用シー
ルドの作用を示す等電位線図である。FIG. 2 is an equipotential diagram showing the action of the electric field adjusting shield of the gas insulating bushing of the example.
【図３】降雨時の状態を示す要部の断面図である。FIG. 3 is a cross-sectional view of a main part showing a state during rainfall.
【図４】実施例のガス絶縁ブッシングの接続導体の部分
の拡大断面図である。FIG. 4 is an enlarged cross-sectional view of a connection conductor portion of the gas-insulated bushing of the example.
【図５】熱伝達促進手段の斜視図である。FIG. 5 is a perspective view of a heat transfer promoting means.
【図６】従来のガス絶縁ブッシングを示す中央縦断面図
である。FIG. 6 is a central longitudinal sectional view showing a conventional gas-insulated bushing.
【図７】従来の他のガス絶縁ブッシングを示す中央縦断
面図である。FIG. 7 is a central longitudinal sectional view showing another conventional gas-insulated bushing.
１ 碍管 ２ 中心導体 2a 主通電部 ３ 大気側高圧シールド ８ 接続導体 ９ 電界調整用シールド 10 熱伝達促進手段 1 Insulator 2 Central conductor 2a Main conducting part 3 Atmospheric pressure shield 8 Connection conductor 9 Shield for electric field adjustment 10 Heat transfer promotion means
Claims (2)
電部とその大気側の部分に接続された、主通電部よりも
径の太い接続導体とからなるものとするとともに、この
接続部の周囲に、この接続部と大気側高圧シールド下端
部との電界調整用シールドを取り付けたことを特徴とす
るガス絶縁ブッシング。1. A central conductor penetrating the inside of the porcelain bushing is composed of a main conducting portion and a connecting conductor having a diameter larger than that of the main conducting portion, which is connected to a portion on the atmosphere side of the main conducting portion. A gas-insulated bushing in which a shield for adjusting the electric field between this connection portion and the lower end portion of the atmosphere-side high-pressure shield is attached to the periphery of.
たことを特徴とする請求項１記載のガス絶縁ブッシン
グ。2. The gas insulated bushing according to claim 1, wherein a heat transfer promoting means is provided inside the connection conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5018804A JP2724086B2 (en) | 1993-02-05 | 1993-02-05 | Gas insulated bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5018804A JP2724086B2 (en) | 1993-02-05 | 1993-02-05 | Gas insulated bushing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06231636A true JPH06231636A (en) | 1994-08-19 |
| JP2724086B2 JP2724086B2 (en) | 1998-03-09 |
Family
ID=11981783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5018804A Expired - Fee Related JP2724086B2 (en) | 1993-02-05 | 1993-02-05 | Gas insulated bushing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2724086B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010097887A1 (en) | 2009-02-24 | 2010-09-02 | 三菱電機株式会社 | Gas bushing |
| EP2704157A1 (en) * | 2012-12-19 | 2014-03-05 | ABB Technology Ltd | Electrical insulator bushing |
| KR20220071712A (en) * | 2020-11-24 | 2022-05-31 | 인텍전기전자 주식회사 | Bushing with built-in shield for electric field relaxation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50119999U (en) * | 1974-03-11 | 1975-09-30 | ||
| JPS59230214A (en) * | 1983-06-13 | 1984-12-24 | 日新電機株式会社 | Device for insulating high voltage conductor |
-
1993
- 1993-02-05 JP JP5018804A patent/JP2724086B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50119999U (en) * | 1974-03-11 | 1975-09-30 | ||
| JPS59230214A (en) * | 1983-06-13 | 1984-12-24 | 日新電機株式会社 | Device for insulating high voltage conductor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010097887A1 (en) | 2009-02-24 | 2010-09-02 | 三菱電機株式会社 | Gas bushing |
| EP2704157A1 (en) * | 2012-12-19 | 2014-03-05 | ABB Technology Ltd | Electrical insulator bushing |
| KR20220071712A (en) * | 2020-11-24 | 2022-05-31 | 인텍전기전자 주식회사 | Bushing with built-in shield for electric field relaxation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2724086B2 (en) | 1998-03-09 |
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