JPH031764B2 - - Google Patents
Info
- Publication number
- JPH031764B2 JPH031764B2 JP58250259A JP25025983A JPH031764B2 JP H031764 B2 JPH031764 B2 JP H031764B2 JP 58250259 A JP58250259 A JP 58250259A JP 25025983 A JP25025983 A JP 25025983A JP H031764 B2 JPH031764 B2 JP H031764B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- insulating
- tube
- capacitor core
- partition wall
- 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 - Lifetime
Links
Landscapes
- Insulators (AREA)
Description
【発明の詳細な説明】
〔発明の概要〕
この発明は、主として直流機器に用いられるガ
スブツシングの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Summary of the Invention] The present invention relates to improvements in gas bushings used primarily in DC equipment.
近年、遠隔地の発電所から都市部へ大きな電力
を長距離送るために、直流送電の有効性が見直さ
れている。この場合、交流−直流変換所などへ直
流機器が必要となるが、大巾な縮小性や優れた耐
汚損性を持ち高い信頼性が得られるSF6ガス絶縁
の採用が考えられている。
In recent years, the effectiveness of DC power transmission has been reconsidered in order to transmit large amounts of power over long distances from power plants in remote areas to urban areas. In this case, DC equipment will be required at the AC-DC converter station, but SF 6 gas insulation is being considered because it has great shrinkability, excellent stain resistance, and high reliability.
これらのガス絶縁機器部から、架空送電線へ接
続する部分にはブツシングが必要となる。ブツシ
ングとしては、油浸紙コンデンサブツシングなど
があるが、ガス絶縁機器には、同じ絶縁媒体を持
つガスブツシングを用いる方が、火災の恐れなど
も無く、好ましい。 Bushings are required for the connection from these gas insulated equipment parts to the overhead power transmission line. Bushings include oil-impregnated paper capacitor bushings, but for gas-insulated equipment, it is preferable to use gas bushings with the same insulating medium since there is no risk of fire.
ガスブツシングは交流用には、種々の形のもの
が作られているが、直流用では、電位分布の様相
が異るためそのままの形では十分な電気的性能が
発揮できない。 Various types of gas bushings are made for AC use, but for DC use, the potential distribution is different, so sufficient electrical performance cannot be achieved if the gas bushing is used as is.
又、ガス絶縁機器では一般に４〜５気圧の加圧
ガスを用いるのでガスブツシングの場合には、併
せて、万一の碍管破損の時、破片飛散しないよ
う、防爆構造とすることが望まれる。 Furthermore, since gas insulated equipment generally uses pressurized gas at 4 to 5 atmospheres, in the case of gas bushings, it is also desirable to have an explosion-proof structure to prevent fragments from scattering in the unlikely event that the insulator tube breaks.
この発明は、かかる点に鑑み、碍管と導体との
間に設けた隔壁をコンデンサコアと、抵抗を均等
にした絶縁筒とで構成することにより、直流機器
に適し、防爆性に秀れたガスブツシングを提供し
ようとするものである。
In view of this, the present invention provides a gas bushing that is suitable for direct current equipment and has excellent explosion-proof properties by constructing a partition wall between the insulator tube and the conductor with a capacitor core and an insulating tube with equal resistance. This is what we are trying to provide.
図はこの発明の一実施例を示すガスブツシング
の断面図である。図において、１は導体であり、
この両端には摺動接触子２，３が設けられ、摺動
接触子２は端子部４へ、又、摺動接触子３は図示
されていないがガス絶縁機器に接続され、これら
は通電路になつている。５は碍管で、内部にSF6
ガスを充填する容器の役目を果し、風雪から内部
を守るとともに、接地部からの絶縁を行つてい
る。６は、導体１に対し、同軸状に箔状電極を多
数枚絶縁物を狭んで配置し、合成樹脂、ここでは
エポキシ樹脂により固化成形したコンデンサコア
であり、碍子５の接地側に近く全長の３分の１以
下の長さの範囲に設けられている。７は、ガラス
繊維やポリエステル繊維などの基材をエポキシ樹
脂で固めて作つた円錐形状をなした絶縁筒であ
り、碍管５の先端近くまで延長されている。この
コンデンサコア６と、絶縁筒７により隔壁８が形
成され、碍管５内のSF6ガスは(A)部と(B)部に区分
される。この例では(A)部と(B)部は、隔壁８により
気密に区分され、(A)部は大気圧に近い0.2〜0.5
Kg／cm2−ｇ程度のガス圧に、(B)部は一般のガス絶
縁機器と同じ３〜５Kg／cm2−ｇ程度のガス圧に設
定されている。
The figure is a sectional view of a gas bushing showing an embodiment of the present invention. In the figure, 1 is a conductor,
Sliding contacts 2 and 3 are provided at both ends, and the sliding contact 2 is connected to the terminal part 4, and the sliding contact 3 is connected to gas insulated equipment (not shown), and these are connected to the current-carrying path. It's getting old. 5 is an insulator, with SF 6 inside.
It serves as a container to fill with gas, protecting the interior from wind and snow, and providing insulation from grounded parts. 6 is a capacitor core in which a large number of foil electrodes are arranged coaxially with the conductor 1 with insulators sandwiched between them, and is solidified and molded with synthetic resin, in this case epoxy resin. It is provided in a range of one-third or less of the length. Reference numeral 7 denotes a conical insulating tube made by solidifying a base material such as glass fiber or polyester fiber with epoxy resin, and extends to near the tip of the insulator tube 5. A partition wall 8 is formed by the capacitor core 6 and the insulating cylinder 7, and the SF 6 gas inside the insulator tube 5 is divided into a part (A) and a part (B). In this example, parts (A) and (B) are airtightly divided by a partition wall 8, and part (A) has a pressure of 0.2 to 0.5, which is close to atmospheric pressure.
The gas pressure in section (B) is set to about 3 to 5 kg/cm 2 -g, which is the same as that of general gas insulated equipment.
ここで、絶縁筒７の肉厚は、次のように決めら
れる。即ち、絶縁筒７の軸直角方向の断面の面積
と、その部分の抵抗率の比が全長に亘つてほゞ一
定になるようにする。即ち、全長に亘つて絶縁筒
７の軸方向の抵抗はほぼ一定になるようにする。 Here, the thickness of the insulating cylinder 7 is determined as follows. That is, the ratio of the cross-sectional area of the insulating tube 7 in the direction perpendicular to the axis and the resistivity of that portion is made to be approximately constant over the entire length. That is, the resistance in the axial direction of the insulating cylinder 7 is made to be approximately constant over the entire length.
したがつて、絶縁筒７が円錐形状の場合は碍管
５の先端側になるほど肉厚を厚くする。 Therefore, if the insulating tube 7 is conical, the wall thickness is increased toward the tip of the insulator tube 5.
ここで抵抗率は温度によりかなり変動するの
で、使用時の温度を考慮に入れる必要がある。こ
のようにすれば、直流電圧が加わつた場合、絶縁
筒７の軸方向の電位はほゞ均一な分布になる。 Here, the resistivity varies considerably depending on temperature, so the temperature at the time of use must be taken into account. In this way, when a DC voltage is applied, the potential in the axial direction of the insulating cylinder 7 will have a substantially uniform distribution.
又、コンデンサコア６では、アルミ箔などで作
られた各電極において、それぞれの相対する面積
がほゞ等しく作られており、相対する電極間の絶
絶厚さもほゞ等しく作られているため、各電極間
の静電容量はほゞ等しくなり、交流や、衝撃波の
加わる場合、コンデンサ内の各電極に加わる電圧
は互に等しい値になり、平等な電位分布となつて
いる。 In addition, in the capacitor core 6, each electrode made of aluminum foil or the like has an approximately equal opposing area, and the absolute thickness between the opposing electrodes is also approximately equal. The capacitance between each electrode is approximately equal, and when an alternating current or shock wave is applied, the voltage applied to each electrode in the capacitor becomes equal to each other, resulting in an equal potential distribution.
さらに、コンデンサコア６の最外層Ｃは取付金
具Ｅと接続され、最内層Ｄは、絶縁筒７の接続金
具Ｆと接続されている。そして、コンデンサコア
６の最内層電極Ｄとで導体１との間の静電容量と
最内層電極Ｄと最外層電極Ｃなどを含む接地部と
の間の静電容量の比を４対６から２対８位になる
ようにしてある。 Further, the outermost layer C of the capacitor core 6 is connected to a mounting fitting E, and the innermost layer D is connected to a connecting fitting F of the insulating cylinder 7. Then, the ratio of the capacitance between the innermost layer electrode D of the capacitor core 6 and the conductor 1 and the capacitance between the innermost layer electrode D and the ground portion including the outermost layer electrode C, etc. is set from 4 to 6. It is set so that the ratio is 2 to 8.
以上に示したこの発明の一実施例によれば、次
のような効果が得られる。直流電圧が加わつた場
合、電圧は抵抗値に比例して分圧され次のように
なる。コンデンサコア６の部分では、かなりの大
きさのほゞ等しい面積を持つ導電性の電極が対向
しており、抵抗値はそれぞれの電極の間の絶縁物
の抵抗で決り、コンデンサコア６では、各電極間
の電位はほゞ等しい値になりコンデンサコア６′
全体として均等な分布になる。一方、前述のよう
に、絶縁筒７の部分も各部の電位が均等に分布さ
れている。しかも、コンデンサコア６の部分に比
べ、絶縁筒７部は、同様の絶縁材料を用いても断
面積が小さく抵抗値が高いため、隔壁８全体とし
ての電位分布は、コンデンサコア６部には1/10以
下程度の電圧しか加わらず、９割程度以上の電圧
は絶縁筒７に加わる。 According to the embodiment of the present invention described above, the following effects can be obtained. When a DC voltage is applied, the voltage is divided in proportion to the resistance value as follows. In the capacitor core 6, conductive electrodes of considerable size and having approximately equal areas face each other, and the resistance value is determined by the resistance of the insulator between each electrode. The potential between the electrodes becomes approximately equal, and the capacitor core 6'
The overall distribution is even. On the other hand, as described above, the electric potential of each part of the insulating cylinder 7 is evenly distributed. Moreover, compared to the capacitor core 6 part, the insulating tube 7 part has a smaller cross-sectional area and higher resistance value even if the same insulating material is used, so the potential distribution of the partition wall 8 as a whole is Only a voltage of about /10 or less is applied, and about 90% or more of the voltage is applied to the insulating cylinder 7.
従つて、直流が加わつた場合、コンデンサコア
６部には平等に電圧が加わるが、全体としては1/
１０以下程度の電圧しか加わらず、この部分は、先
端が接続金具Ｆの形状をした通常の接地電極に近
い働きをして、碍管５表面部の大気中の電界を緩
和し、９割程度以上の電圧は絶縁筒７の全長に亘
りほゞ均一に分担されることになり、耐電圧特性
の秀れたブツシングとなる。 Therefore, when DC is applied, the voltage is applied equally to the six parts of the capacitor core, but the voltage as a whole is 1/1.
Only a voltage of about 10 or less is applied, and this part functions similar to a normal grounding electrode with the tip shaped like a connecting fitting F, mitigating the electric field in the atmosphere on the surface of the insulator tube 5, and reducing the electric field by about 90% or more. The voltage is distributed almost uniformly over the entire length of the insulating tube 7, resulting in a bushing with excellent withstand voltage characteristics.
又、直流機器にも、雷や開閉サージなどの衝撃
的な異常電圧も加わる。この場合の電位は主に静
電容量に依存して分布する。従つて、前述のよう
な静電容量の比とするとき、コンデンサコア６の
部分に20〜40％の電位が加わり、しかもこの部分
はほゞ平等な電位分布となる。一般に、コンデン
サコア６が無い場合碍管５の接地側に電界強度の
極端に強い部分を生じ耐電圧特性の低下をまねく
が、この発明の一実施例にではこれを防ぎ、衝撃
電圧に対する耐電圧性にも優れたブツシングが得
られる。 Furthermore, shocking abnormal voltages such as lightning and switching surges are also applied to DC equipment. The potential in this case is distributed mainly depending on the capacitance. Therefore, when the capacitance ratio is as described above, 20 to 40% of the potential is applied to the capacitor core 6, and this part has a substantially equal potential distribution. Generally, when there is no capacitor core 6, an extremely strong electric field is generated on the ground side of the insulator tube 5, leading to a drop in withstand voltage characteristics.However, in an embodiment of the present invention, this can be prevented, and the withstand voltage characteristics against shock voltage can be improved. Excellent bushing can also be obtained.
又、コンデンサコア６と絶縁筒７とよりなる隔
壁８により、碍管５の内面のガス圧は、大気圧に
近い低いガス圧となつているので、万一、碍管５
の破損するような場合にも、碍管破片の飛散を防
止することができる。 In addition, the gas pressure on the inner surface of the insulator tube 5 is low, close to atmospheric pressure, due to the partition wall 8 made up of the capacitor core 6 and the insulating tube 7.
Even in the event of damage to the insulator, it is possible to prevent fragments of the insulator from scattering.
なお、この隔壁８は、完全な気密とはしない
で、小孔でガス区分(A)及び(B)を通じガス圧はいず
れも３〜５Kg／cm2−ｇのガス絶縁機器の通常の値
とするが、隔壁８によりガス区分(A)の部分の容積
を小さくし碍管破損時に働く高圧ガスの量を少く
してガスエネルギを小さくして、飛散量を少くす
る方策を取ることもできる。 Note that this partition wall 8 is not completely airtight, but has small holes through gas sections (A) and (B), and the gas pressure is 3 to 5 kg/cm 2 -g, which is the normal value for gas insulated equipment. However, it is also possible to take measures to reduce the amount of scattering by reducing the volume of the gas section (A) by using the partition wall 8 to reduce the amount of high-pressure gas that acts when the insulator tube breaks, thereby reducing the gas energy.
なお、絶縁筒７は、円筒状の絶縁筒を複数個接
続して、概略の円錐形状として形成することも、
製作上有利な場合もある。 Note that the insulating cylinder 7 can also be formed into a roughly conical shape by connecting a plurality of cylindrical insulating cylinders.
There are also some manufacturing advantages.
〔発明の効果〕
この発明は以上説明したように、隔壁をコンデ
ンサコアと、抵抗を軸方向に沿つて均等にした絶
縁筒とで構成したので、耐サージ、防爆性に優れ
るとともに直流電位分布が良好となり直流耐電圧
が向上するという効果がある。[Effects of the Invention] As explained above, in this invention, the partition wall is composed of a capacitor core and an insulating tube with equal resistance along the axial direction, so it has excellent surge resistance and explosion resistance, and has a DC potential distribution. This has the effect of improving DC withstand voltage.
図はこの発明の一実施例におけるガスブツシン
グを示す断面図である。図において、１は導体、
５は碍管、６はコンデンサコア、７は絶縁筒、８
は隔壁、Ｃ，Ｄは箔状電極である。
The figure is a sectional view showing a gas bushing in an embodiment of the present invention. In the figure, 1 is a conductor,
5 is an insulator tube, 6 is a capacitor core, 7 is an insulating tube, 8
are partition walls, and C and D are foil electrodes.
Claims (1)
上記碍管の一端で支持して、上記碍管と上記導体
との間に同軸状に配置した隔壁で上記碍管と上記
隔壁との間に上記絶縁ガスが所定の圧力で充填さ
れたガス室を構成し、上記碍管の他端が接地され
るガスブツシングにおいて、上記隔壁は上記碍管
の一端側に配置され上記導体の軸方向と直角の断
面積と抵抗率との比が上記軸方向に沿つてほぼ一
定となる厚さをもつ円筒あるいは円錐状の絶縁筒
と、上記碍管の他端側に配置され最外層の電極が
接地される多層箔状電極と絶縁物とで略円筒状に
形成されたコンデンサコアとで構成されているこ
とを特徴とするガスブツシング。1. A conductor filled with insulating gas and passed through the insulating tube is supported at one end of the insulating tube, and a partition wall is disposed coaxially between the insulating tube and the conductor, and the insulating gas is disposed between the insulating tube and the partition wall. constitutes a gas chamber filled with a predetermined pressure, and the other end of the insulator tube is grounded. a cylindrical or conical insulating cylinder having a thickness such that the ratio of A gas bushing characterized in that it is composed of a capacitor core formed in a substantially cylindrical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25025983A JPS60143520A (en) | 1983-12-29 | 1983-12-29 | Gas bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25025983A JPS60143520A (en) | 1983-12-29 | 1983-12-29 | Gas bushing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60143520A JPS60143520A (en) | 1985-07-29 |
| JPH031764B2 true JPH031764B2 (en) | 1991-01-11 |
Family
ID=17205221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25025983A Granted JPS60143520A (en) | 1983-12-29 | 1983-12-29 | Gas bushing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60143520A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018215274A1 (en) * | 2018-09-07 | 2020-03-12 | Siemens Aktiengesellschaft | Arrangement and method for potential reduction in high voltage technology |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341745U (en) * | 1976-09-14 | 1978-04-11 | ||
| JPS5889719A (en) * | 1981-11-20 | 1983-05-28 | 三菱電機株式会社 | Bushing |
-
1983
- 1983-12-29 JP JP25025983A patent/JPS60143520A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60143520A (en) | 1985-07-29 |
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