JPH09190934A - Dc transmission transformer - Google Patents
Dc transmission transformerInfo
- Publication number
- JPH09190934A JPH09190934A JP8002535A JP253596A JPH09190934A JP H09190934 A JPH09190934 A JP H09190934A JP 8002535 A JP8002535 A JP 8002535A JP 253596 A JP253596 A JP 253596A JP H09190934 A JPH09190934 A JP H09190934A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- spacer
- electric field
- oil
- shield ring
- 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
- Insulating Of Coils (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、直流送電用変圧器
に係り、特に、運転時に直流分を含む電圧波形が加わる
直流送電用の交直変換用変圧器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC transmission transformer, and more particularly to a DC transmission AC / DC conversion transformer to which a voltage waveform including a DC component is added during operation.
【０００２】[0002]
【従来の技術】直流送電に用いられる交直変換用変圧器
は、図２に示すように、絶縁油１が充填されたタンク２
内に、鉄心３とその脚部に円筒状に巻回された巻線４と
からなる変圧器本体を収納することによって構成されて
おり、上記巻線４は、互に同軸円筒状に十分な絶縁距離
を保って配置された直流巻線５および交流巻線６と、絶
縁性能を向上させるためにこれらの巻線５，６間に配置
された絶縁紙からなる絶縁筒７とから構成されている。2. Description of the Related Art As shown in FIG. 2, a transformer for AC / DC conversion used for DC power transmission has a tank 2 filled with insulating oil 1.
It is constituted by accommodating therein a transformer main body composed of an iron core 3 and a winding wire 4 wound around its leg portion in a cylindrical shape, and the winding wire 4 is sufficiently coaxial with each other. It is composed of a DC winding 5 and an AC winding 6 arranged with an insulation distance maintained, and an insulating tube 7 made of insulating paper arranged between these windings 5 and 6 for improving the insulation performance. There is.
【０００３】図３および図４は、このような交直変換用
変圧器の絶縁構造の各例を示すものである。FIGS. 3 and 4 show examples of the insulating structure of such a transformer for AC / DC conversion.
【０００４】直流巻線５は、導体８ａを油浸紙からなる
絶縁物８ｂで被覆してなる素線８を円盤状に複数回巻回
して構成された複数個の円盤状単位巻線９を図示しない
スペーサを介して上下方向に積み重ねることによって構
成され、その下端には、曲率半径の大きい導体１０ａを
油浸紙からなる絶縁物１０ｂで被覆したものに成型絶縁
物１０ｃを沿えてその周囲を油浸紙からなる絶縁物１０
ｄで一体に被覆してなる電界緩和用シールドリング１０
が配置されている。交流巻線６も直流巻線５と同様に構
成され、その下端に曲率半径の大きい導体１１ａの周囲
を油浸紙からなる絶縁物１１ｂで被覆してなる電界緩和
用シールドリング１１が同様に配置されている。また、
直流巻線５およびシールドリング１０と、交流巻線６お
よびシールドリング１１の周囲には、それぞれ油浸紙か
らなる断面Ｉ字型絶縁筒１２、断面Ｌ字型絶縁筒１３お
よび断面逆Ｌ字型絶縁筒１４が配置されて絶縁構造が構
成されている。The DC winding 5 is composed of a plurality of disk-shaped unit windings 9 formed by winding a wire 8 formed by covering a conductor 8a with an insulator 8b made of oil-impregnated paper in a disk shape a plurality of times. It is constructed by vertically stacking via a spacer (not shown), and a lower end thereof is formed by covering a conductor 10a having a large radius of curvature with an insulator 10b made of oil-impregnated paper along a molded insulator 10c. Insulator made of oil-immersed paper 10
d. Shield ring for electric field relaxation integrally coated with d
Is arranged. The AC winding 6 is also configured in the same manner as the DC winding 5, and an electric field alleviating shield ring 11 in which the periphery of a conductor 11 a having a large radius of curvature is covered with an insulator 11 b made of oil-impregnated paper is similarly arranged at the lower end. Have been. Also,
Around the DC winding 5 and the shield ring 10 and the AC winding 6 and the shield ring 11, an I-shaped insulating cylinder 12, an L-shaped insulating cylinder 13 and an inverted L-shaped cross-section made of oil-impregnated paper, respectively. The insulating tube 14 is arranged to form an insulating structure.
【０００５】また、図５に示すように、直流巻線５とシ
ールドリング１０の間には、冷却通路を形成しかつ機械
的強度を保持するために、径方向に延びる複数のスペー
サ１５が周方向に間隔をあけた状態で介挿され、さらに
直流巻線５の内周側および外周側に沿って油浸紙からな
る絶縁補強用の円筒状絶縁物（複数の円弧状部片を周方
向に並べることによって構成されている。）１６，１７
が設けられている。As shown in FIG. 5, a plurality of radially extending spacers 15 are provided between the DC winding 5 and the shield ring 10 to form a cooling passage and maintain mechanical strength. And a cylindrical insulator for insulation reinforcement made of oil-impregnated paper (a plurality of arc-shaped pieces are inserted along the inner and outer sides of the DC winding 5 in the circumferential direction). 16 and 17).
Is provided.
【０００６】なお、図３と図４は直流巻線５と交流巻線
６の配置が径方向において互に反対になっている点が相
違するだけで、その他の構造は同じである。3 and 4 have the same structure except that the arrangement of the DC winding 5 and the AC winding 6 is opposite to each other in the radial direction.
【０００７】ところで、交直変換用変圧器の直流巻線５
およびシールドリング１０に加えられた直流高電圧下の
直流電位分布は、その構成絶縁物の抵抗率に支配される
が、油浸紙の抵抗率は主たる絶縁油である変圧器油の抵
抗率に比べて８０℃で１０〜５０倍と大きいため、これ
らの部分における電圧分担は油浸紙からなる絶縁物に負
うところが大きく、この結果、油浸紙からなる絶縁物内
部で高電界が生じることになる。By the way, the DC winding 5 of the AC / DC conversion transformer
And the DC potential distribution under DC high voltage applied to the shield ring 10 is governed by the resistivity of the constituent insulators, but the resistivity of the oil-immersed paper depends on the resistivity of the transformer oil, which is the main insulating oil. At 80 ° C., it is as large as 10 to 50 times, so that the voltage sharing in these parts largely depends on the insulator made of oil immersion paper. As a result, a high electric field is generated inside the insulator made of oil immersion paper. Become.
【０００８】そこで従来は、例えば特開昭６０−２００
５０９号公報や特開昭６２−２５０９号公報に見られる
ように、直流巻線端部での絶縁耐力を向上させるため
に、その最内層および最外層に位置する素線の被覆絶縁
物を取り除くことにより、この部分での電圧分担を少な
くして高電界の発生を抑制するといった改善策がなされ
てきた。Therefore, conventionally, for example, JP-A-60-200
As disclosed in Japanese Unexamined Patent Publication No. 509 and Japanese Unexamined Patent Publication (Kokai) No. 62-2509, in order to improve the dielectric strength at the end of the DC winding, the insulation covering the wires located at the innermost and outermost layers is removed. As a result, improvement measures have been taken to reduce the voltage distribution in this portion and suppress the generation of a high electric field.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、近年、
直流電圧の大半を分担する油浸紙からなる絶縁物の抵抗
率に方向性があり、その中でも、油浸紙の沿層方向の破
壊電界値は変圧器油並みであることが判明し、油浸紙の
沿層方向の電界値の低減を行なう必要が生じてきた。However, in recent years,
The resistivity of the insulator made of oil-impregnated paper that shares most of the DC voltage has directionality, and among them, the breakdown electric field value in the layered direction of oil-impregnated paper was found to be comparable to that of transformer oil. A need has arisen to reduce the electric field value in the layered direction of the paper immersion.
【００１０】また、今後、直流送電の電圧上昇のニーズ
が高まるに伴い、直流絶縁構造における絶縁耐力を向上
させる必要があるが、上記した油浸紙の方向性を考慮し
た改善は行なわれていない。[0010] Further, in the future, as the need for increasing the voltage of DC power transmission increases, it is necessary to improve the dielectric strength of the DC insulation structure, but the above-described improvement in consideration of the directionality of the oil immersion paper has not been made. .
【００１１】さらに、上記したように、直流絶縁におけ
る電圧分担の度合いは、その絶縁構造を構成する要素の
抵抗率に支配されるため、発生電圧が大きくなれば同様
の電界値を保つためには、絶縁距離はその比率に応じて
大きくなり、それは機器のサイズ増大につながる。した
がって、絶縁距離を低減するために局部的に高電界の発
生する部位の電界値を抑制する必要がある。Furthermore, as described above, the degree of voltage sharing in DC insulation is governed by the resistivity of the elements constituting the insulation structure. Therefore, if the generated voltage increases, it is necessary to maintain the same electric field value. In addition, the insulation distance increases according to the ratio, which leads to an increase in the size of the equipment. Therefore, in order to reduce the insulation distance, it is necessary to suppress the electric field value at a site where a high electric field is locally generated.
【００１２】図５中における一点鎖線Ｄ1，Ｄ2で囲った
部分においては、直流巻線５の絶縁補強用の円筒状絶縁
物１６，１７およびシールドリング１０の被覆絶縁物１
０ｄとこれらの間に介挿されるスペーサ１５との間に、
絶縁油１が入り込み、それぞれくさび状の油ギャップが
形成されるが、これらのくさび状のギャップでは絶縁油
の抵抗率が低く、その上下に位置する油浸紙からなる各
絶縁物で直流電圧の大半を分担することになる。In the portions surrounded by alternate long and short dash lines D 1 and D 2 in FIG. 5, cylindrical insulators 16 and 17 for insulation reinforcement of the DC winding 5 and a coating insulator 1 of the shield ring 10 are provided.
0d and a spacer 15 interposed therebetween.
The insulating oil 1 enters, and wedge-shaped oil gaps are formed. In these wedge-shaped gaps, the resistivity of the insulating oil is low. Most will be shared.
【００１３】図５のＤ2部分を拡大して図６に示す。こ
の図６中の一点鎖線Ｂ1で囲った部分、すなわち油浸紙
からなるスペーサ１５とシールドリング１０の油浸紙か
らなる被覆絶縁物１０ｄの間のくさび状の油ギャップの
ように、その沿層方向Ｃが互に径方向である絶縁物の組
合せ部を電気力線が渡る場合や、また、一点鎖線Ｂ2で
囲った部分、すなわち油浸紙からなる円筒状絶縁物１７
と油浸紙からなるスペーサ１５の間のくさび状の油ギャ
ップのように、その沿層方向Ｃが互に異なる上下方向と
径方向である絶縁物の組合せ部を電気力線が渡る場合、
これらの組合せ部には電界が集中し易く、特に油浸紙か
らなる絶縁物の沿層方向に高電圧が発生する。[0013] an enlarged D 2 parts of FIG. 5 is shown in FIG. A portion surrounded by the one-dot chain line B 1 in FIG. 6, that is, like a wedge-shaped oil gap between the spacer 15 made of oil-impregnated paper and the coated insulator 10d made of oil-impregnated paper of the shield ring 10, its vicinity is formed. In the case where the lines of electric force cross a combination portion of the insulators in which the layer directions C are radial directions to each other, or the portion surrounded by the one-dot chain line B 2 , that is, the cylindrical insulator 17 made of oil-impregnated paper.
When a line of electric force crosses a combined portion of insulators whose vertical directions C are different from each other, such as a wedge-shaped oil gap between the spacer 15 and the spacer 15 made of oil-immersed paper,
An electric field tends to concentrate on these combination parts, and a high voltage is generated particularly in a layer direction of an insulator made of oil immersion paper.
【００１４】上記したように、油浸紙からなる絶縁物の
破壊電界値には異方性があり、直流耐電界値はその沿層
方向では絶縁油とほぼ同等であるため、上記Ｂ1，Ｂ2部
分では絶縁物の沿層方向、すなわち径方向の絶縁裕度が
非常に低くなって、絶縁上の弱点となる。なお、このよ
うな問題はＤ1部分においても同様に生じる。[0014] As described above, since the breakdown electric field value of the insulator made of oil-immersed paper has anisotropy, DC withstand field value at that edgewise is almost equivalent to the insulating oil, the B 1, edgewise of the insulator in the B 2 moiety, i.e. the radial direction of the insulating tolerance becomes very low, the weaknesses insulation. Incidentally, such a problem occurs also in D 1 part.
【００１５】このときの直流電界解析マッピング例を図
７に示す。この図において、矢印Ｆで示すように、直流
電圧の等電位線Ｅに対して垂直方向の直流電界が発生
し、かつ、この直流電界Ｆは油浸紙からなるスペーサ１
５や被覆絶縁物１０ｄの沿層方向と一致しているため、
この沿層方向に高電圧が発生していることが分る。FIG. 7 shows an example of DC electric field analysis mapping at this time. In this figure, as shown by an arrow F, a DC electric field is generated in a direction perpendicular to the equipotential line E of the DC voltage, and the DC electric field F is a spacer 1 made of oil-impregnated paper.
5 and the covering insulating material 10d,
It can be seen that a high voltage is generated in this direction.
【００１６】直流送電の電圧上昇に伴って、このような
くさび状の油ギャップにおける電界の集中は、絶縁破壊
を引き起こす要因になると考えられる。It is considered that such a concentration of the electric field in the wedge-shaped oil gap with a rise in the voltage of the DC power transmission causes a dielectric breakdown.
【００１７】したがって、本発明の目的は、上記スペー
サと上記電界緩和用シールドリングの境界部、あるい
は、上記直流巻線の端部と上記スペーサの境界部、ある
いはまた、上記両境界部における油浸紙からなる絶縁物
の沿層方向に加わる直流電圧の電界値を低減してその絶
縁強度を向上し得る直流送電用変圧器を提供することに
ある。Therefore, an object of the present invention is to provide an oil immersion at the boundary between the spacer and the shield ring for reducing electric field, or at the boundary between the end of the DC winding and the spacer, or at both boundaries. An object of the present invention is to provide a DC power transmission transformer capable of reducing an electric field value of a DC voltage applied in a layer direction of an insulator made of paper and improving the insulation strength.
【００１８】[0018]
【課題を解決するための手段】油浸紙からなる絶縁物の
破壊電界値は、その沿層方向においては絶縁油とほぼ同
じであるが、その貫層方向においては沿層方向や絶縁油
の破壊電界値よりも一桁以上高い。The breakdown electric field value of an insulator made of oil-impregnated paper is almost the same as that of the insulating oil in the direction along the layer. One or more digits higher than the breakdown electric field value.
【００１９】本発明は、この点に着目してなされたもの
で、上記スペーサと上記電界緩和用シールドリングの境
界部、あるいは、上記直流巻線の端部と上記スペーサの
境界部、あるいはまた、上記両境界部にわたる領域の内
径側と外径側に沿って、その貫層方向が径方向である油
浸紙からなる直流電圧分担用絶縁物を設け、これらの境
界部や両境界部にわたる領域に加わる直流電圧を直流電
圧分担用絶縁物の貫層方向で分担するようにしたことを
特徴とする。The present invention has been made in view of this point, and the boundary between the spacer and the shield ring for alleviating the electric field, or the boundary between the end of the DC winding and the spacer, or Along the inner diameter side and the outer diameter side of the region extending over the two boundaries, a DC voltage sharing insulator made of oil-impregnated paper whose permeation direction is the radial direction is provided, and the region extending over these boundaries and the two boundaries is provided. The DC voltage applied to the DC voltage is distributed in the direction of the penetrating layer of the DC voltage sharing insulator.
【００２０】[0020]
【発明の実施の形態】以下、本発明の一実施形態を図１
について説明する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
Will be described.
【００２１】スペーサ１５は、その内外周側の突出部分
が削除されて、その内外周面が円筒状絶縁物１６の内周
面、円筒状絶縁物１７の外周面、および電界緩和用シー
ルドリング１０の内外周面とほぼ面一に形成され、円筒
状絶縁物１７の下端面とスペーサ１５の上面との重合部
の上方からスペーサ１５の下面と電界緩和用シールドリ
ング１０の上方外径側角部との間に形成された油ギャッ
プの下方にわたり、これらに当接して直流電圧分担用絶
縁板１８が設けられている。この直流電圧分担用絶縁板
１８は、油浸紙からなり、その貫層方向Ａが径方向であ
る絶縁板を、周方向に順次折り曲げて円筒状に形成さ
れ、かつ各スペーサ１５間の冷却通路に対応する位置に
は、径方向に貫通孔１８ａが形成されて、冷却通路への
絶縁油１の流通を妨げないようになっている。その他の
構成は上記した従来例と同様である。The spacer 15 has its inner and outer peripheral portions removed, and its inner and outer peripheral surfaces are the inner peripheral surface of the cylindrical insulator 16, the outer peripheral surface of the cylindrical insulator 17, and the shield ring 10 for reducing the electric field. Are formed substantially flush with the inner and outer peripheral surfaces of the spacer, and from above the overlapping portion between the lower end surface of the cylindrical insulator 17 and the upper surface of the spacer 15, from above the lower surface of the spacer 15 and the upper outer diameter side corner of the electric field mitigation shield ring 10. A DC voltage sharing insulating plate 18 is provided below and in contact with the oil gaps formed between them. The DC voltage sharing insulating plate 18 is made of oil-impregnated paper, and is formed by bending an insulating plate having a radial direction of the permeation layer direction A sequentially in the circumferential direction so as to have a cylindrical shape. Are formed at the positions corresponding to the radial direction, so that the flow of the insulating oil 1 to the cooling passage is not hindered. Other configurations are the same as those of the above-described conventional example.
【００２２】なお、図１では、直流巻線の下端部および
下方の電界緩和用シールドリングの外径側部分のみしか
図示していないが、その内径側部分や、直流巻線の上端
部および上方の電界緩和用シールドリングの内外径側部
分においても同様に直流電圧分担用絶縁板が設けられ
る。In FIG. 1, only the lower end portion of the DC winding and the outer diameter side portion of the lower electric field reducing shield ring are shown. Similarly, a DC voltage sharing insulating plate is provided on the inner and outer diameter sides of the electric field relaxing shield ring.
【００２３】この実施例によれば、円筒状絶縁物１７の
下端面とスペーサ１５の上面との重合部や、スペーサ１
５の下面と電界緩和用シールドリング１０との間に形成
された油ギャップに加わる直流電圧を、これらの部分の
内径側および外径側に沿って設けた油浸紙からなる直流
電圧分担用絶縁板１８の抵抗率の高い貫層方向で分担す
るので、これらの部分に加わる直流電圧のほとんどは直
流電圧分担用絶縁板１８で分担されることになり、その
結果、これらの部分の絶縁構造を構成する油浸紙からな
るスペーサ１５や電界緩和用シールドリング１０の被覆
絶縁物１０ｄなどでの沿層方向に発生する電界値を低く
抑え、絶縁耐力を向上することができる。According to this embodiment, the overlapping portion between the lower end surface of the cylindrical insulator 17 and the upper surface of the spacer 15 or the spacer 1
The DC voltage applied to the oil gap formed between the lower surface of the filter 5 and the shield ring 10 for reducing electric field is converted into a DC voltage sharing insulation made of oil-impregnated paper provided along the inner and outer diameter sides of these portions. Since the plate 18 is shared in the direction of the transmissive layer having high resistivity, most of the DC voltage applied to these portions is shared by the DC voltage sharing insulating plate 18, and as a result, the insulating structure of these portions is reduced. The electric field value generated in the layer direction along the spacer 15 made of the oil-impregnated paper and the insulating insulator 10d of the shield ring 10 for reducing the electric field can be suppressed low, and the dielectric strength can be improved.
【００２４】図８は本実施形態の直流電界解析マッピン
グ例を示すものである。図８中、Ｇは等電位線、矢印Ｈ
は直流電界の発生方向を示す。FIG. 8 shows an example of DC electric field analysis mapping according to this embodiment. 8, G is an equipotential line, arrow H
Indicates the direction in which the DC electric field is generated.
【００２５】この図８と、直流電圧分担用絶縁板１８を
設けない従来例の直流電界解析マップ例を示す図７を比
較すれば、これらの部分での直流電界値は直流電圧分担
用絶縁板１８を設けることにより、これを設ける以前に
対して大幅に減少していることが分かる。すなわち、直
流電圧分担用絶縁板１８を設けることにより、これらの
部分での直流電圧分担をコントロールし、これらの部分
で発生する沿層方向の電界値を抑制することができる。FIG. 8 is compared with FIG. 7 which shows an example of a DC electric field analysis map of the conventional example in which the DC voltage sharing insulating plate 18 is not provided. It can be seen that the provision of 18 significantly reduces the size before the provision. That is, by providing the DC voltage sharing insulating plate 18, the DC voltage sharing in these portions can be controlled, and the electric field value in the layer direction generated in these portions can be suppressed.
【００２６】上記実施形態では、直流電圧分担用絶縁板
１８を円筒状絶縁物１７とスペーサ１５との重合部、お
よびスペーサ１５と電界緩和用シールドリング１０との
間に形成された油ギャップの両部分にわたって設けた
が、これに限らず、これらの部分のうちの上記重合部の
みあるいは油ギャップのみにわたって設けたり、またこ
れらの部分の上記重合部および油ギャップにわたって各
別に設けることもできる。In the above-described embodiment, the DC voltage sharing insulating plate 18 is used for both the overlapping portion of the cylindrical insulator 17 and the spacer 15 and the oil gap formed between the spacer 15 and the shield ring 10 for reducing the electric field. Although provided over the portion, the invention is not limited to this, and it is also possible to provide over only the overlapping portion or the oil gap of these portions, or to separately provide over the overlapping portion and the oil gap of these portions.
【００２７】さらに、直流電圧分担用絶縁板１８を円筒
状に形成し、これをスペーサ１５が配置された周方向の
各位置に共通して設けられているが、直流電圧分担用絶
縁板１８を複数個の円弧状板とし、これらをスペーサ１
５が配置された周方向の各位置に対応して各別に設けて
もよい。Further, the DC voltage sharing insulating plate 18 is formed in a cylindrical shape and is provided in common at each circumferential position where the spacer 15 is arranged. A plurality of arc-shaped plates and these are spacers 1
5 may be provided separately corresponding to each position in the circumferential direction where the 5 is arranged.
【００２８】[0028]
【発明の効果】以上説明した本発明によれば、油浸紙か
らなる絶縁物における破壊電界値の異方性に着目し、上
記スペーサと上記電界緩和用シールドリングの境界部、
あるいは、上記直流巻線の端部と上記スペーサの境界
部、あるいはまた上記両境界部にわたる領域の内径側お
よび外径側に沿って、その貫層方向が径方向である油浸
紙からなる直流電圧分担用絶縁物を設け、これらの境界
部や両境界部にわたる領域に加わる直流電圧を抵抗率の
高い直流電圧分担用絶縁物の貫層方向で分担するように
したので、これらの各部分に加わる直流電圧のほとんど
はこの直流電圧分担用絶縁物で分担されることになり、
その結果、これらの部分の絶縁構造を構成する油浸紙か
らなるスペーサや被覆絶縁物での沿層方向の電界値が低
減し、絶縁耐力を向上することができる。According to the present invention described above, focusing on the anisotropy of the breakdown electric field value in the insulator made of oil-impregnated paper, the boundary portion between the spacer and the electric field relaxation shield ring,
Alternatively, a direct current made of oil-impregnated paper whose permeation direction is radial along an inner diameter side and an outer diameter side of an end portion of the DC winding and a boundary portion of the spacer or a region extending between the two boundary portions. A voltage sharing insulator is provided, and the DC voltage applied to these boundaries and the region extending between both boundaries is shared in the direction of the transmissive layer of the DC voltage sharing insulator having a high resistivity. Most of the applied DC voltage will be shared by this DC voltage sharing insulator,
As a result, the electric field value in the layer direction in the spacer or the covering insulator made of oil-impregnated paper constituting the insulating structure of these portions is reduced, and the dielectric strength can be improved.
【図１】本発明の一実施形態に係る交直変換用変圧器の
要部拡大断面図である。FIG. 1 is an enlarged sectional view of a main part of an AC / DC conversion transformer according to an embodiment of the present invention.
【図２】交直変換用変圧器の全体構造を示す概略断面図
である。FIG. 2 is a schematic sectional view showing the entire structure of the AC / DC conversion transformer.
【図３】従来の交直変換要変圧器の一例を示す断面図で
ある。FIG. 3 is a sectional view showing an example of a conventional AC / DC conversion required transformer.
【図４】従来の交直変換用変圧器の他の例を示す断面図
である。FIG. 4 is a cross-sectional view showing another example of the conventional AC / DC conversion transformer.
【図５】図３または図４に示した交直変換用変圧器の直
流巻線の下端部付近を示す拡大断面図である。5 is an enlarged sectional view showing the vicinity of the lower end of the DC winding of the transformer for AC / DC conversion shown in FIG. 3 or FIG. 4;
【図６】図５のＤ2部分付近を示す要部拡大断面図であ
る。6 is an enlarged sectional view showing the vicinity of D 2 parts of FIG.
【図７】図６に示したＤ2部分付近の直流電界解析マッ
ピング例を示す説明図である。7 is an explanatory diagram showing a DC electric field analysis mapping example in the vicinity of D 2 portion shown in FIG.
【図８】図１に示した交直変換用変圧器におけるＤ2部
分に相当する部分付近の直流電界解析マッピング例を示
す説明図である。8 is an explanatory diagram showing a DC electric field analysis mapping example in the vicinity of the portion corresponding to D 2 parts of AC-DC converter transformer shown in FIG.
１ 絶縁油 ２ タンク ３ 鉄心 ５ 直流巻線 ６ 交流巻線 ８ 素線 ８ａ 素線導体 ８ｂ 素線絶縁物 ９ 円盤状単位巻線 １０ 電界緩和用シールドリング １０ａ シールドリングの導体 １０ｄ シールドリングの油浸紙からなる被覆絶縁物 １２，１３，１４ 絶縁筒 １５ 油浸紙からなる絶縁スペーサ １６，１７ 絶縁補強用円筒状絶縁物 １８ 直流電圧分担用絶縁板 DESCRIPTION OF SYMBOLS 1 Insulating oil 2 Tank 3 Iron core 5 DC winding 6 AC winding 8 Element wire 8a Element conductor 8b Element insulator 9 Disc-shaped unit winding 10 Electric field relaxation shield ring 10a Shield ring conductor 10d Shield ring oil immersion Insulating insulator made of paper 12, 13, 14 Insulating cylinder 15 Insulating spacer made of oil-impregnated paper 16, 17 Insulating reinforcing cylindrical insulator 18 DC voltage sharing insulating plate
フロントページの続き (72)発明者 門脇 慎 茨城県日立市国分町一丁目１番１号 株式 会社日立製作所国分工場内 (72)発明者 小幡 俊光 茨城県日立市国分町一丁目１番１号 株式 会社日立製作所国分工場内 (72)発明者 小島 啓明 茨城県日立市大みか町七丁目２番１号 株 式会社日立製作所電力・電機開発本部内 (72)発明者 関根 一夫 茨城県日立市国分町一丁目１番１号 株式 会社日立製作所国分工場内 (72)発明者 田中 誠 大阪府大阪市北区中之島３丁目３番22号 関西電力 株式会社内 (72)発明者 杉原 洋 香川県高松市丸の内２番５号 四国電力 株式会社内 (72)発明者 牧野 芳範 東京都中央区銀座六丁目15番１号 電源開 発 株式会社内Front Page Continuation (72) Inventor Shin Kadowaki 1-1-1 Kokubuncho, Hitachi City, Ibaraki Hitachi Ltd. Kokubun Plant (72) Inventor Toshimitsu Obata 1-1-1 Kokubuncho, Hitachi City, Ibaraki (72) Inventor, Hiroaki Kojima, 7-2-1, Omika-cho, Hitachi-shi, Ibaraki, Hitachi, Ltd. Electricity and Electric Power Development Division, Hitachi, Ltd. (72) Kazuo Sekine, Kokubun-cho, Hitachi-shi, Ibaraki 1-1-1, Hitachi Kokubun Plant, Ltd. (72) Inventor Makoto Tanaka 3-3-22 Nakanoshima, Kita-ku, Osaka-shi, Osaka Kansai Electric Power Co., Inc. (72) Inventor Hiroshi Sugihara 2 Marunouchi, Takamatsu-shi, Kagawa Prefecture No. 5 Shikoku Electric Power Co., Inc. (72) Inventor Yoshinori Makino 6-15-1, Ginza, Chuo-ku, Tokyo Power source development Co., Ltd.
Claims (3)
この鉄心に巻回された直流巻線および交流巻線からなる
変圧器本体を収納し、上記直流巻線の端部にスペーサを
介して電界緩和用シールドリングを配置するとともに、
上記直流巻線はその周囲に巻回された絶縁紙からなる絶
縁物によって絶縁され、上記スペーサはその沿層方向が
径方向である絶縁紙からなる絶縁物によって構成され、
上記電界緩和用シールドリングは導体とその周囲に巻回
された絶縁紙からなる絶縁物によって構成された直流送
電用変圧器において、上記スペーサと上記電界緩和用シ
ールドリングの間の内径側および外径側に沿って、その
貫層方向が径方向である油浸紙からなる直流電圧分担用
絶縁物を設け、上記スペーサと上記電界緩和用シールド
リングの境界部に加わる直流電圧を上記直流電圧分担用
絶縁物の貫層方向で分担するようにしたことを特徴とす
る直流送電用変圧器。1. A transformer filled with an iron core and a DC winding and an AC winding wound around the iron core is accommodated in a tank filled with insulating oil, and a spacer is provided at an end of the DC winding. Shield ring for electric field mitigation
The DC winding is insulated by an insulator made of insulating paper wound therearound, and the spacer is made of an insulator made of insulating paper having a radial direction along its layer direction,
In the DC transmission transformer, the shield ring for electric field relaxation is composed of a conductor and an insulator made of insulating paper wound around the conductor, the inner diameter and outer diameter between the spacer and the shield ring for electric field relaxation. Along the side, a DC voltage sharing insulator made of oil-impregnated paper whose permeation direction is a radial direction is provided, and the DC voltage applied to the boundary between the spacer and the electric field mitigation shield ring is used for the DC voltage sharing. A transformer for DC power transmission, wherein the transformer is shared in the direction of the penetrating layer of the insulator.
この鉄心に巻回された直流巻線および交流巻線からなる
変圧器本体を収納し、上記直流巻線の端部にスペーサを
介して電界緩和用シールドリングを配置するとともに、
上記直流巻線はその周囲に巻回された絶縁紙からなる絶
縁物によって絶縁され、上記スペーサはその沿層方向が
径方向である絶縁紙からなる絶縁物によって構成され、
上記電界緩和用シールドリングは導体とその周囲に巻回
された絶縁紙からなる絶縁物によって構成された直流送
電用変圧器において、上記直流巻線の端部と上記スペー
サの間の内径側と外径側に沿って、その貫層方向が径方
向である油浸紙からなる直流電圧分担用絶縁物を設け、
上記直流巻線の端部と上記スペーサの境界部に加わる直
流電圧を上記直流電圧分担用絶縁物の貫層方向で分担す
るようにしたことを特徴とする直流送電用変圧器。2. A transformer main body comprising an iron core and a DC winding and an AC winding wound around the iron core is housed in a tank filled with insulating oil, and a spacer is provided at an end of the DC winding. While arranging the shield ring for electric field relaxation via
The DC winding is insulated by an insulator made of insulating paper wound therearound, and the spacer is made of an insulator made of insulating paper having a radial direction along its layer direction,
In the DC power transmission transformer, the shield ring for electric field relaxation is formed of an insulator made of a conductor and insulating paper wound around the conductor, an inner diameter side between the end of the DC winding and the spacer and an outer side. Along the radial side, a DC voltage sharing insulator made of oil-impregnated paper whose permeation direction is the radial direction is provided,
A DC transmission transformer, wherein a DC voltage applied to an end portion of the DC winding and a boundary portion of the spacer is shared in a penetrating direction of the DC voltage sharing insulator.
この鉄心に巻回された直流巻線および交流巻線からなる
変圧器本体を収納し、上記直流巻線の端部にスペーサを
介して電界緩和用シールドリングを配置するとともに、
上記直流巻線はその周囲に巻回された絶縁紙からなる絶
縁物によって絶縁され、上記スペーサはその沿層方向が
径方向である絶縁紙からなる絶縁物によって構成され、
上記電界緩和用シールドリングは導体とその周囲に巻回
された絶縁紙からなる絶縁物によって構成された直流送
電用変圧器において、上記直流巻線の端部から上記スペ
ーサを介して上記電界緩和用シールドリングにわたる領
域の内径側および外径側に沿って、その貫層方向が径方
向である油浸紙からなる直流電圧分担用絶縁物を設け、
上記領域に加わる直流電圧を上記直流電圧分担用絶縁物
の貫層方向で分担するようにしたことを特徴とする直流
送電用変圧器。3. A transformer filled with an iron core and a DC winding and an AC winding wound around the iron core is accommodated in a tank filled with insulating oil, and a spacer is provided at an end of the DC winding. Shield ring for electric field mitigation
The DC winding is insulated by an insulator made of insulating paper wound therearound, and the spacer is made of an insulator made of insulating paper having a radial direction along its layer direction,
The shield ring for electric field relaxation is a transformer for DC power transmission composed of an insulator made of a conductor and insulating paper wound around the conductor, wherein the shield ring for electric field relaxation is provided from the end of the DC winding via the spacer. Along the inner diameter side and the outer diameter side of the region extending over the shield ring, a DC voltage sharing insulator made of oil-impregnated paper whose permeation direction is the radial direction is provided,
A DC transmission transformer, wherein a DC voltage applied to the region is shared in a direction in which the DC voltage sharing insulator penetrates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8002535A JP2728162B2 (en) | 1996-01-10 | 1996-01-10 | Transformer for DC transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8002535A JP2728162B2 (en) | 1996-01-10 | 1996-01-10 | Transformer for DC transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09190934A true JPH09190934A (en) | 1997-07-22 |
| JP2728162B2 JP2728162B2 (en) | 1998-03-18 |
Family
ID=11532085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8002535A Expired - Fee Related JP2728162B2 (en) | 1996-01-10 | 1996-01-10 | Transformer for DC transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2728162B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6733369B1 (en) | 2002-09-30 | 2004-05-11 | Carl Zeiss Semiconductor Manufacturing Technologies, Ag | Method and apparatus for polishing or lapping an aspherical surface of a work piece |
| JP2014165431A (en) * | 2013-02-27 | 2014-09-08 | Fuji Electric Co Ltd | Superconducting coil and superconducting transformer |
| JP2019212483A (en) * | 2018-06-05 | 2019-12-12 | トヨタ自動車株式会社 | Lithium ion secondary battery |
-
1996
- 1996-01-10 JP JP8002535A patent/JP2728162B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6733369B1 (en) | 2002-09-30 | 2004-05-11 | Carl Zeiss Semiconductor Manufacturing Technologies, Ag | Method and apparatus for polishing or lapping an aspherical surface of a work piece |
| JP2014165431A (en) * | 2013-02-27 | 2014-09-08 | Fuji Electric Co Ltd | Superconducting coil and superconducting transformer |
| JP2019212483A (en) * | 2018-06-05 | 2019-12-12 | トヨタ自動車株式会社 | Lithium ion secondary battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2728162B2 (en) | 1998-03-18 |
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