JP2804739B2 - Induction device for DC transmission - Google Patents
Induction device for DC transmissionInfo
- Publication number
- JP2804739B2 JP2804739B2 JP6816196A JP6816196A JP2804739B2 JP 2804739 B2 JP2804739 B2 JP 2804739B2 JP 6816196 A JP6816196 A JP 6816196A JP 6816196 A JP6816196 A JP 6816196A JP 2804739 B2 JP2804739 B2 JP 2804739B2
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- Japan
- Prior art keywords
- insulating
- liquid
- winding
- insulating paper
- transformer
- Prior art date
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は直流送電用誘導電器
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誘導電器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction transformer for DC transmission, and more particularly to an induction transformer for DC transmission to which a voltage waveform including a DC component is added during operation.
【０００２】[0002]
【従来の技術】従来の交流用油入誘導電器、例えば変圧
器、リアクトルは、交流電圧下での運転および絶縁仕様
確認試験時の絶縁特性のみが考慮されてきた。しかし、
近年、周波数変換装置や交直変換装置などにおいて、高
電圧・大容量の直流送電システムが実用化されてきた。
ここで用いられる油入誘導電器には、交流のみならず、
直流の高電圧が加わることとなる。一般によく知られて
いるように、複数の異なる絶縁材料で構成された絶縁系
に直流電圧が加わった場合の絶縁系内の電界は、各絶縁
材料の体積抵抗率に依存する。特に、現状において用い
られている変圧器用鉱油と絶縁紙からなる絶縁物との複
合絶縁においては、絶縁紙の体積抵抗率が変圧器鉱油の
体積抵抗率に比べて８０℃の場合で１０〜５０倍大きい
ため、交直変換用変圧器における電圧分担は、絶縁紙か
らなる絶縁物に負うところが大きい。この結果、絶縁紙
からなる絶縁物の内部で直流高電界が発生するが、更
に、その絶縁紙からなる各絶縁物の組合せ部周辺に生じ
る油ギャップにおいても直流高電界が生じる結果とな
る。2. Description of the Related Art Conventional oil-immersed induction machines for AC, such as transformers and reactors, have been considered only for operation under AC voltage and insulation characteristics at the time of insulation specification confirmation test. But,
In recent years, DC power transmission systems with high voltage and large capacity have been put to practical use in frequency converters, AC / DC converters, and the like.
The oil-filled induction device used here is not only AC,
High DC voltage is applied. As is generally well known, an electric field in an insulating system when a DC voltage is applied to an insulating system composed of a plurality of different insulating materials depends on the volume resistivity of each insulating material. In particular, in the composite insulation of a mineral oil for transformer and an insulator made of insulating paper, which is currently used, the volume resistivity of the insulating paper is 10 to 50 at 80 ° C. in comparison with the volume resistivity of the transformer mineral oil. Therefore, the voltage sharing in the transformer for AC / DC conversion largely depends on the insulator made of insulating paper. As a result, a high DC electric field is generated inside the insulator made of insulating paper, and further, a high DC electric field is generated also in an oil gap generated around a combined portion of each insulator made of the insulating paper.
【０００３】また、交流用誘導電器において、その絶縁
液として、不燃性に着目してＰＦＣ（パーフルオロカー
ボン）液を使用することは、例えば特開平３−１２０７
０６号公報にみられるように知られている。[0003] Further, in an alternating current induction device, a PFC (perfluorocarbon) liquid has been used as an insulating liquid for its incombustibility, for example, as disclosed in Japanese Patent Laid-Open No. 3-1207.
No. 06 is known.
【０００４】[0004]
【発明が解決しようとする課題】一般に、油入誘導電器
では、その絶縁油としては変圧器用鉱油が用いられ、絶
縁被覆等の絶縁物にはクラフト紙やプレスボードなどの
絶縁紙に変圧器用鉱油を含浸した油浸紙が用いられてい
る。通常、前述のように絶縁紙の体積抵抗率は変圧器用
鉱油の体積抵抗率に比べて一桁以上大きいため、絶縁紙
からなる絶縁物の内部では直流高電界が発生するが、絶
縁紙からなる絶縁物の直流における耐電界値は十分に高
く、絶縁紙からなる絶縁物から絶縁破壊が発生すること
はない。その一方で、複雑な形状をした絶縁構造におい
ては、絶縁紙からなる各絶縁物の組合せ部等で微小な油
ギャップが生じることがある。この部分に発生する直流
電界値は、絶縁紙からなる絶縁物中で生じる高電界をう
けて、非常に高くなる。ところが、変圧器用鉱油の直流
耐圧は、絶縁紙に比べて一桁以上小さいため、このよう
な部分における高電界の発生は絶縁上の弱点となる。In general, in an oil-filled induction electric machine, mineral oil for a transformer is used as the insulating oil. Mineral oil for a transformer is used as an insulating material such as insulating coating for insulating paper such as kraft paper or press board. Oil impregnated paper is used. Normally, as described above, the volume resistivity of insulating paper is one order of magnitude or more greater than the volume resistivity of mineral oil for transformers, so a DC high electric field is generated inside an insulator made of insulating paper, but it is made of insulating paper. The dielectric strength of the insulator at a direct current is sufficiently high, and dielectric breakdown does not occur from the insulator made of insulating paper. On the other hand, in an insulating structure having a complicated shape, a minute oil gap may be generated at a combination portion of each insulator made of insulating paper. The value of the DC electric field generated in this portion becomes extremely high due to the high electric field generated in the insulator made of insulating paper. However, since the DC withstand voltage of the mineral oil for transformers is one or more digits lower than that of insulating paper, the generation of a high electric field in such a portion is a weak point in insulation.
【０００５】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上の弱点を克服
し、絶縁耐力の向上を図る必要がある。直流絶縁におい
て、発生電圧が大きくなれば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。[0005] In the future, as the need for increasing the voltage of DC transmission increases, it is necessary to overcome the insulation weakness of the DC insulation structure and improve the dielectric strength. In DC insulation, when the generated voltage increases, the insulation distance increases according to the ratio, which leads to an increase in the size of the device.
【０００６】したがって、本発明の目的は、絶縁紙から
なる各絶縁物の組合せ部などにおける絶縁液中の局部的
な直流高電界の発生を抑制して、絶縁強度を向上するこ
とにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to suppress the occurrence of a local high DC electric field in an insulating liquid in a combination portion of insulators made of insulating paper and the like, and to improve the insulation strength.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に、本発明は、上記した複合絶縁構造における絶縁液と
して、これまで一般に用いられていた変圧器用鉱油に代
えて、これよりも体積抵抗率の高い絶縁液、例えばＰＦ
Ｃ液を用いることにより、絶縁紙からなる絶縁物の直流
電圧分担に対する絶縁液側の直流電圧分担を増加させて
直流電位分布を均等化したことを特徴とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an insulating liquid in the above-mentioned composite insulating structure, which replaces the mineral oil for transformers which has been generally used so far, with a higher volume resistivity. Insulating liquid with high efficiency, such as PF
By using the liquid C, the DC voltage distribution on the insulating liquid side with respect to the DC voltage distribution of the insulating material made of insulating paper is increased, and the DC potential distribution is equalized.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施形態を図面に
ついて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【０００９】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、絶縁液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。As shown in FIG. 2, a transformer for AC / DC conversion used for DC power transmission includes a tank 2 filled with an insulating liquid 1.
In this case, a transformer main body comprising an iron core 3 and a winding 4 wound in a cylindrical shape on its legs is housed therein, and the windings 4 are sufficiently coaxially cylindrical with each other. It is composed of a DC winding 5 and an AC winding 6 arranged with an insulation distance therebetween, and an insulating cylinder 7 made of insulating paper arranged between these windings 5 and 6 to improve insulation performance. I have.
【００１０】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.
【００１１】直流巻線５は、導体８ａを絶縁紙からなる
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
絶縁紙からなる絶縁物１０ｂで被覆したものに成型絶縁
物１０ｃを沿えてその周囲を絶縁紙からなる絶縁物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
を絶縁紙からなる絶縁物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、それぞれ絶縁紙か
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 includes a plurality of disk-shaped unit windings 9 each formed by winding a wire 8 formed by covering a conductor 8a with an insulating material 8b made of insulating paper in a disk shape a plurality of times. The conductor is formed by vertically stacking via a spacer that does not have a lower end, and a conductor 10a having a large radius of curvature is covered with an insulator 10b made of insulating paper. Insulator 10 made of
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 insulating paper is disposed at the lower end thereof. ing. 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 tube 12, an L-shaped insulating tube 13 and an inverted L-shaped insulating tube, respectively, made of insulating paper. The cylinder 14 is arranged to form an insulating structure.
【００１２】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のスペーサ１５が介挿され、さらに
直流巻線５の内周側および外周側に沿って絶縁紙からな
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 spacer 15 is formed between the DC winding 5 and the shield ring 10 to form a cooling passage and maintain mechanical strength. A cylindrical insulator for insulation reinforcement made of insulating paper (constituted by arranging a plurality of arc-shaped pieces in the circumferential direction) along the inner peripheral side and the outer peripheral side.
Is provided.
【００１３】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。FIGS. 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.
【００１４】ところで、図５中における一点鎖線Ｃ1，
Ｃ2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１０ｄとこれらの間に介挿されるスペーサ１
５との間に、絶縁液１が入り込み、それぞれくさび状の
液ギャップが形成される。これらのくさび状のギャップ
では、絶縁液として従来の変圧器用鉱油を用いた場合に
は、その体積抵抗率が低く、その上下に位置する絶縁紙
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
るが、例えばスペーサ１５からシールドリング１０の被
覆絶縁物１０ｄへと電気力線が渡る際に、液ギャップに
も電圧が分担される部位が生じ、この液ギャップ部分で
は特に高電圧が発生する。上記したように、変圧器用鉱
油の直流耐電界値は、絶縁紙からなる絶縁物に比べて一
桁以上小さいため、この部位では絶縁裕度が非常に小さ
くなって、絶縁上の弱点となる。Incidentally, the dashed line C 1 in FIG.
In the portion surrounded by C 2 , the cylindrical insulators 16 and 17 for insulation reinforcement of the DC winding 5 and the covering insulator 10 d of the shield ring 10 and the spacer 1 interposed therebetween are provided.
5, the insulating liquid 1 enters, and wedge-shaped liquid gaps are respectively formed. In these wedge-shaped gaps, when conventional mineral oil for transformers is used as the insulating liquid, the volume resistivity is low, and the majority of the DC voltage is shared by the insulators located above and below the insulating paper. That is, for example, when electric lines of force pass from the spacer 15 to the coating insulator 10d of the shield ring 10, a portion where a voltage is shared also occurs in the liquid gap, and particularly high voltage is generated in the liquid gap portion. I do. As described above, the DC withstand electric field value of the mineral oil for transformers is smaller than that of the insulator made of insulating paper by one digit or more.
【００１５】このときの直流電界解析マッピング例を図
６に示す。図６における一点鎖線Ｂで囲った絶縁物の組
合せ部分では直流電圧の等電位線Ａの間隔が密となって
いるため、高電界が発生し、この部位が絶縁上の弱点と
なることが予想される。FIG. 6 shows an example of DC electric field analysis mapping at this time. In the combination of insulators surrounded by the dashed line B in FIG. 6, since the equipotential lines A of the DC voltage are closely spaced, a high electric field is generated, and this portion is expected to be a weak point on insulation. Is done.
【００１６】そこで、本実施形態では絶縁液として、変
圧器用鉱油の体積抵抗率と比較してそれよりも高い体積
抵抗率をもった絶縁液を使用し、絶縁液に現状よりも高
い直流電圧を分担させることにより、上記のような各絶
縁物の組合せ部分での絶縁液中の電界値を低減する。Therefore, in the present embodiment, an insulating liquid having a volume resistivity higher than that of the mineral oil for transformer is used as the insulating liquid, and a DC voltage higher than the current level is applied to the insulating liquid. The sharing reduces the electric field value in the insulating liquid at the combination of the insulators as described above.
【００１７】この変圧器用鉱油よりも高い体積抵抗率を
持った絶縁液としては、例えばＰＦＣ（パーフルオロカ
ーボン）液が挙げられる。変圧器用鉱油／絶縁紙からな
る絶縁物、の体積抵抗率比は、１：１０〜１：１００で
あるのに対し、ＰＦＣ液／絶縁紙からなる絶縁物、の体
積抵抗率比は、１：５〜１：１０程度であり、直流電位
分布を均等化する上で好適である。An example of the insulating liquid having a higher volume resistivity than the mineral oil for transformers is a PFC (perfluorocarbon) liquid. The volume resistivity ratio of mineral oil for transformers / insulating paper made of insulating paper is 1:10 to 1: 100, whereas the volume resistivity ratio of PFC liquid / insulating material made of insulating paper is 1: 1. It is about 5 to 1:10, which is suitable for equalizing the DC potential distribution.
【００１８】この高い体積抵抗率をもったＰＦＣ液を絶
縁液として用いた場合の直流電界解析マッピング例を図
１に示す。図１を見て分かるように、変圧器用鉱油／絶
縁紙からなる絶縁物、の複合絶縁構造では、微小な油ギ
ャップに高電界が発生していた絶縁紙からなる絶縁物の
組合せ部分が、絶縁液にＰＦＣ液を用いることで、図６
と比べ、全体的に直流電圧の等電位線Ａの間隔が均等と
なっているため、全体的に直流の電位分布が均等に近く
なる方向になり、Ｂ部における局部的な高電界の発生が
抑制されている。FIG. 1 shows an example of DC electric field analysis mapping when the PFC liquid having a high volume resistivity is used as an insulating liquid. As can be seen from FIG. 1, in the composite insulating structure of mineral oil for a transformer / insulating material made of insulating paper, the combined portion of the insulating material made of insulating paper in which a high electric field was generated in the minute oil gap was insulated. By using a PFC liquid as the liquid, FIG.
In comparison, since the intervals of the equipotential lines A of the DC voltage are generally uniform, the distribution of the DC potential becomes generally uniform as a whole, and the local high electric field is generated in the portion B. Is suppressed.
【００１９】なお、上記した実施形態では、誘導電器と
して電器本体が鉄心と巻線を備えた内鉄形変圧器につい
て述べたが、本発明はこれに限らず、外鉄形変圧器はも
ちろんのこと、鉄心と巻線を備える鉄心形リアクトル
や、巻線のみで鉄心を持たない空心形リアクトルなどに
も広く適用することができる。In the above-described embodiment, the core-type transformer in which the electric body has an iron core and a winding has been described as an induction electric device. However, the present invention is not limited to this, and it is needless to say that the core-type transformer is not limited to the core-type transformer. In addition, the present invention can be widely applied to an iron-core reactor having an iron core and a winding, and an air-core reactor having only a winding and having no iron core.
【００２０】[0020]
【発明の効果】以上説明したように、本発明によれば、
直流電圧が印加される直流送電用誘導電器において、絶
縁油と絶縁紙からなる絶縁物との複合絶縁構造における
絶縁油として、従来用いられていた変圧器用鉱油に代え
て、これよりも体積抵抗率の高い絶縁液、例えばＰＦＣ
液を用いたので、絶縁紙からなる絶縁物の直流電圧分担
に対する絶縁液の直流電圧分担を増加させて、絶縁液と
絶縁紙からなる絶縁物との直流電位分布を均等化する方
向にし、絶縁紙からなる各絶縁物の組合せ部などで絶縁
液中に発生する直流高電界を抑制することができる。そ
の結果、絶縁距離を短縮した絶縁構成が得られ、誘導電
器の寸法を縮小し、省スペース化、低損化を図り、経済
性に優れた直流送電用誘導電器を提供することができ
る。As described above, according to the present invention,
Inductor for direct current power transmission, to which direct current voltage is applied, replaces the conventionally used mineral oil for transformer as the insulating oil in the composite insulating structure of the insulating oil and the insulating material made of insulating paper. High insulation liquid, such as PFC
Since the liquid is used, the DC voltage sharing of the insulating liquid with respect to the DC voltage sharing of the insulating material made of insulating paper is increased, so that the DC potential distribution between the insulating liquid and the insulating material made of insulating paper is equalized, It is possible to suppress a high DC electric field generated in the insulating liquid in a combination portion of each insulator made of paper. As a result, it is possible to obtain an insulation configuration with a reduced insulation distance, to reduce the dimensions of the induction device, to save space and reduce loss, and to provide an induction device for DC power transmission excellent in economic efficiency.
【図１】本発明の一実施形態における交直交換用変圧器
の要部の直流電界解析マッピング例を示す説明図であ
る。FIG. 1 is an explanatory diagram showing a DC electric field analysis mapping example of a main part of an AC / DC exchange 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】交直変換用変圧器の詳細構造の一例を示す縦断
面図である。FIG. 3 is a longitudinal sectional view showing an example of a detailed structure of a transformer for AC / DC conversion.
【図４】交直変換用変圧器の詳細構造の他例を示す縦断
面図である。FIG. 4 is a longitudinal sectional view showing another example of the detailed structure of the 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縦断面図である。5 is an enlarged vertical 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】従来における交直変換用変圧器の要部の直流電
界解析マッピング例を示す説明図である。FIG. 6 is an explanatory diagram showing a DC electric field analysis mapping example of a main part of a conventional AC / DC conversion transformer.
１ 絶縁液（ＰＦＣ液） ２ タンク ３ 鉄心 ５ 直流巻線 ６ 交流巻線 １０ 電界緩和用シールドリング １２〜１４ 絶縁筒 １５ 絶縁スペーサ １６，１７ 絶縁補強用円筒状絶縁物 Ａ 直流電圧の等電位線 Ｂ 液ギャップを含む各絶縁物の組合せ部分 DESCRIPTION OF SYMBOLS 1 Insulation liquid (PFC liquid) 2 Tank 3 Iron core 5 DC winding 6 AC winding 10 Shield ring for electric field relaxation 12-14 Insulation cylinder 15 Insulation spacer 16, 17 Cylindrical insulator for insulation reinforcement A DC voltage equipotential line B Combined parts of insulators including liquid gap
───────────────────────────────────────────────────── 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 藤田 裕幸 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 畑野 雅幸 東京都中央区銀座六丁目15番１号 電源 開発 株式会社内 (58)調査した分野(Int.Cl.6，ＤＢ名) H01F 27/10──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Shin Kadowaki 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Hitachi, Ltd. Kokubu Plant (72) Inventor Toshimitsu Obata 1-1-1 Kokubuncho, Hitachi City, Ibaraki Prefecture No. 1 Hitachi, Ltd. Kokubu Plant (72) Inventor Hiroyuki Fujita 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside Hitachi, Ltd. Kokubu Plant (72) Inventor Hiroaki Kojima Omika, Hitachi City, Ibaraki Prefecture 7-2-1, Machi-cho Hitachi Power Systems Co., Ltd. (72) Inventor Kazuo Sekine 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Hitachi, Ltd. Kokubu Plant (72) Inventor Tanaka Makoto Makoto 3-3-22 Nakanoshima, Kita-ku, Osaka-shi Kansai Electric Power Co., Inc. (72) Inventor Hiroshi Sugihara 2-5 Marunouchi, Takamatsu City, Kagawa Prefecture Shikoku Within the force Co., Ltd. (72) inventor Masayuki Hatano, Chuo-ku, Tokyo Ginza 6-chome 15th No. 1 Electric Power Development Co., Ltd. in the (58) investigated the field (Int.Cl. 6, DB name) H01F 27/10
Claims (2)
とも直流巻線および交流巻線を備えた誘導電器本体を収
納し、これらの各巻線はその周囲に配置された絶縁紙か
らなる絶縁物によって絶縁された直流送電用誘導電器に
おいて、上記絶縁液として体積抵抗率が変圧器用鉱油の
体積抵抗率よりも高いものを用い、絶縁紙からなる絶縁
物の直流電圧分担に対する絶縁液の直流電圧分担を増加
させたことを特徴とする直流送電用誘導電器。1. An induction device body having at least a DC winding and an AC winding is housed in a tank filled with an insulating liquid, and each of these windings is made of an insulating paper made of insulating paper disposed around the winding. Insulation device for direct current power transmission insulated by using a material having a volume resistivity higher than the volume resistivity of mineral oil for transformer as the insulating liquid, and the DC voltage sharing of the insulating liquid to the DC voltage sharing of the insulating material made of insulating paper. An induction device for DC power transmission, characterized by an increase in
ルオロカーボン液であることを特徴とする直流送電用誘
導電器。2. The induction device for DC power transmission according to claim 1, wherein the insulating liquid is a perfluorocarbon liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6816196A JP2804739B2 (en) | 1996-03-25 | 1996-03-25 | Induction device for DC transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6816196A JP2804739B2 (en) | 1996-03-25 | 1996-03-25 | Induction device for DC transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09260150A JPH09260150A (en) | 1997-10-03 |
| JP2804739B2 true JP2804739B2 (en) | 1998-09-30 |
Family
ID=13365765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6816196A Expired - Lifetime JP2804739B2 (en) | 1996-03-25 | 1996-03-25 | Induction device for DC transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2804739B2 (en) |
-
1996
- 1996-03-25 JP JP6816196A patent/JP2804739B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09260150A (en) | 1997-10-03 |
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