JPS59197115A - Stationary induction electric apparatus - Google Patents
Stationary induction electric apparatusInfo
- Publication number
- JPS59197115A JPS59197115A JP58071354A JP7135483A JPS59197115A JP S59197115 A JPS59197115 A JP S59197115A JP 58071354 A JP58071354 A JP 58071354A JP 7135483 A JP7135483 A JP 7135483A JP S59197115 A JPS59197115 A JP S59197115A
- Authority
- JP
- Japan
- Prior art keywords
- electrostatic shield
- foil
- electrostatic shielding
- semiconductor
- induction electric
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
Description
【発明の詳細な説明】
[発明の技術分野]
本発明は、金属シートと絶縁シー1〜を重ねて巻いた箔
状の巻線を有し、この巻線内に冷却ダクトを内蔵した方
式の静止誘導電気機器に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention has a foil-like winding in which a metal sheet and an insulating sheet 1 to 1 are wound in layers, and a cooling duct is built into the winding. Concerning stationary induction electrical equipment.
[発明の技術的背景]
箔状巻線を有する静止誘導電気機器、例えば箔巻変圧器
は、占積率がよいので、小形・軽量化を実現できる特徴
がある。既に数KV、数100KVA稈度の比較的電圧
の低い小容量の変圧器では実用化されている。[Technical Background of the Invention] Stationary induction electrical equipment having a foil winding, such as a foil-wound transformer, has a good space factor and is therefore characterized by its ability to be made smaller and lighter. It has already been put to practical use in small capacity transformers with relatively low voltages of several KV and several hundred KVA.
最近に至り、その優れた長所に鑑み、より高電圧・大容
量の例えば275KV、300MVA変圧器に適用拡大
が研究されているが、実用化に当って最大の問題点は、
いかに冷却能力を向上させ、高い絶縁能力を巻線にもた
せられるかという点である。この様に箔巻巻線を用いた
高電圧入容量変圧器の実用化には種々の問題点があるが
、既に公知であり研究されている箔巻変圧器としては、
巻線内に冷却ダクトを内蔵させ、ここに蒸発特性のほれ
た冷媒をポンプにより送り込み、巻線損失がら発生ずる
熱を直接的に冷やず、いわばヒートパイプ式のものがあ
る。Recently, in view of its excellent advantages, research has been conducted to expand its application to higher voltage and larger capacity transformers, such as 275KV and 300MVA, but the biggest problem in practical application is:
The question is how to improve cooling capacity and provide high insulation capacity to the windings. As described above, there are various problems in the practical application of high-voltage input capacity transformers using foil-wound windings, but as foil-wound transformers that are already known and have been studied,
There is a heat pipe type in which a cooling duct is built into the winding, and a refrigerant with good evaporation properties is pumped into this duct, and the heat generated by winding loss is not directly cooled.
第1図に、このヒートバイブ式箔巻変圧器の構造を示す
。Figure 1 shows the structure of this heat vib type foil-wound transformer.
鉄心の脚部1の外周に金属シート2が絶縁シー1−3を
介して多数回巻付りられて、低圧巻線4と高圧巻線5と
が形成されている。これらの低高圧巻線4,5間には、
中空状の金属製冷却ダクト6が内蔵されている。この冷
却ダク1〜6は、巻線の巻回方向に沿った円筒状或は分
割された円筒状をしており、その中空部である傳い隙間
内にはフロンR−113やノロリナートFC75といっ
た冷!7が封入されている。この冷媒7は、変圧器外部
に設(プられた冷却装置のポンプ8により、導液管10
及び絶縁バイブ9を介して冷却ダク1−6に循環されて
、巻線内の発熱を冷媒の蒸発潜熱で奪い、その後再び絶
縁バイブ9及び導液管10を介して冷却装置11に導く
。そして、冷却装置の凝縮器11内において水冷却管1
2で冷却させ、再び凝縮させる様になっている。凝縮さ
れて液化された冷媒7は、冷媒タンク13に溜めら°れ
、更にポンプ8で再び巻線内の冷却ダクト6に送り込ま
れる。A metal sheet 2 is wound many times around the outer periphery of the leg portion 1 of the iron core via an insulating sheath 1-3 to form a low-voltage winding 4 and a high-voltage winding 5. Between these low and high voltage windings 4 and 5,
A hollow metal cooling duct 6 is built-in. The cooling ducts 1 to 6 have a cylindrical shape or a divided cylindrical shape along the winding direction of the winding wire, and have a hollow space filled with Freon R-113 or Norolinert FC75. cold! 7 is included. This refrigerant 7 is supplied to the liquid conduit 10 by a pump 8 of a cooling device installed outside the transformer.
The refrigerant is circulated through the cooling duct 1-6 via the insulating vibe 9, and the heat generated in the windings is removed by the latent heat of evaporation of the refrigerant, after which it is led to the cooling device 11 again via the insulating vibe 9 and the liquid guide pipe 10. In the condenser 11 of the cooling device, the water cooling pipe 1
2, it is cooled and condensed again. The condensed and liquefied refrigerant 7 is stored in a refrigerant tank 13, and is sent again to the cooling duct 6 within the windings by the pump 8.
この様にして冷w7の循環回路の設けられた箔巻変圧器
本体は、絶縁油或はS F6ガスといった絶縁媒体14
と共に、タンク15内に収納されている。この場合、ス
テンレス等の金属で造られた導液管10はタンク15等
のアース電位に、また冷却ダクト6は、巻線4,5間に
組込まれている関係上、近接する巻線と同電位に電気的
に接続されている。In this way, the main body of the foil-wound transformer provided with the cold W7 circulation circuit is coated with an insulating medium 14 such as insulating oil or SF6 gas.
It is also housed in the tank 15. In this case, the liquid guide pipe 10 made of metal such as stainless steel is connected to the ground potential of the tank 15, etc., and the cooling duct 6 is installed between the windings 4 and 5, so that it is at the same potential as the adjacent winding. electrically connected to a potential.
以上説明した様な構造の変圧器は、冷却の為の冷媒と絶
縁の為の絶縁媒体14とが完全に分離(セパレート)さ
れていることから、特にセパレート式箔巻変圧器と呼ば
れている。The transformer with the structure described above is particularly called a separate foil-wound transformer because the refrigerant for cooling and the insulating medium 14 for insulation are completely separated. .
[背景技術の問題点]
本方式の変圧器は冷媒の蒸発潜熱を利用しているので、
侵れIζ冷却特性を期待できるので大容量変圧器には有
望である。[Problems with the background technology] Since the transformer of this method uses the latent heat of vaporization of the refrigerant,
Since erosion Iζ cooling characteristics can be expected, it is promising for large capacity transformers.
しかし、第1図に示す様な従来のセパレート式箔巻変圧
器には、次の問題点がある。However, the conventional separate foil-wound transformer as shown in FIG. 1 has the following problems.
即ち、レバレート式箔巻変圧器では、巻線と同電位の金
属製冷却ダクト6と、アース電位の金属製導液管10と
の接続には絶縁バイブ9が用いられる。そして、第2図
に示す様に、冷却ダクト6と絶縁バイブ9の接続は、冷
却ダク1〜6の上縁に設りられた口出しバイブロ1の先
端i1を絶縁バイブ9の下端に挿入することにより行う
。ところが、この接続部においては、口出しバイブロ1
と導液’fl 10とが大きな電位差を有する為、口出
しバイブロ1の先端aに電界が集中して、絶縁バイブ9
を這って放電が進展するクリープ破壊の原因となったり
、また接続部に金属製の止め具62を用いた場合、これ
を突起部として電界が集中し、絶縁媒体中の部分放電の
原因となったりする等、絶縁上の弱点を有していた。That is, in the levered foil-wound transformer, the insulating vibrator 9 is used to connect the metal cooling duct 6, which has the same potential as the winding, and the metal liquid guiding pipe 10, which has the earth potential. As shown in FIG. 2, the cooling duct 6 and the insulating vibrator 9 are connected by inserting the tip i1 of the opening vibro 1 provided at the upper edge of the cooling ducts 1 to 6 into the lower end of the insulating vibrator 9. This is done by However, in this connection, the opening vibro 1
Since there is a large potential difference between
If a metal stopper 62 is used at the connection, the electric field will concentrate using this as a protrusion, causing partial discharge in the insulating medium. It had insulation weaknesses such as
この弱点を補うべく、第3図に示す様に金属製の口出し
バイブロ1の上部に、金Iil製の環状リング等からな
る静電シールド63を設け、口出しバイブロ1の先端に
電界が集中しない様に構成した箔巻変圧器が提案されて
いる。ところが°、この種の箔巻変圧器においても、次
の様な問題点が存在づる。In order to compensate for this weakness, as shown in FIG. 3, an electrostatic shield 63 made of an annular ring made of gold or the like is provided on the top of the metal outlet vibro 1 to prevent the electric field from concentrating on the tip of the outlet vibro 1. A foil-wound transformer configured as follows has been proposed. However, even this type of foil-wound transformer has the following problems.
即ち、箔巻巻線は、鉄心の脚部の外周に金属シート2が
絶縁シート3を介して巻回されるから、その磁束は鉄心
の脚部に多数流れるが、この時洩れ磁束が巻線内部や巻
線とヨーク鉄心16間の絶縁空間に流れる。この洩れ磁
束が静電シールド63を通過すると、従来の箔巻変圧器
では静電シールド63が金属製rある為、そこにうり゛
電流が流れ局部加熱を生じる。この局部加熱によって口
出しバイブロ1内を通過する冷媒が暖められてしまい、
暖められた冷媒が冷却ダクトを流れることになる為に、
冷却効率が低下して変圧器全体の湿度が上界し、これに
より更に冷媒が暖められ冷却効率が低下するという悪循
環を引き起こすおそれがある。そして、これを防止刃−
るには、巻線に内蔵する冷却ダク]〜数を増加しlζす
、冷却装置として能力の人ぎな大型のものが必要どなり
、変圧器の小型化が困tliとなる不都合があった。That is, in the foil-wound winding, a metal sheet 2 is wound around the outer periphery of the leg of the iron core with an insulating sheet 3 interposed therebetween, so a large amount of the magnetic flux flows through the leg of the iron core, but at this time, leakage magnetic flux flows into the winding. It flows inside and in the insulating space between the winding and the yoke core 16. When this leakage magnetic flux passes through the electrostatic shield 63, since the electrostatic shield 63 is made of metal in the conventional foil-wound transformer, a current flows there and causes local heating. This local heating warms the refrigerant passing through the outlet vibro 1,
Because the warmed refrigerant flows through the cooling duct,
There is a risk that the cooling efficiency will decrease and the humidity of the entire transformer will reach an upper limit, which will further warm the refrigerant and cause a vicious cycle in which the cooling efficiency will decrease. And the blade to prevent this
In order to increase the number of cooling ducts built into the windings, a large and powerful cooling device is required, which makes it difficult to downsize the transformer.
[発明の目的]
本発明は、上記の如き従来技術の欠点に鑑み提案された
もので、静電シールドの局部加熱を防止し、冷媒による
冷却効率を高め、小型化された大容量の箔巻変圧器を提
供することを目的とする。[Object of the Invention] The present invention was proposed in view of the above-mentioned shortcomings of the prior art, and it provides a miniaturized large-capacity foil wrapping that prevents local heating of the electrostatic shield and improves the cooling efficiency of the refrigerant. The purpose is to provide transformers.
[発明の概要]
本発明の箔巻変圧器は、金属製の口出しパイプの上部に
設けた静電シールドを、ある程度の抵抗率を右する半導
体材料により]14成させたものであり、半導体材料の
抵抗により洩れ磁束油清時にお(Jるうず電流の発生を
防ぎ静電シールドの局部加熱を解消したものである。[Summary of the Invention] The foil-wound transformer of the present invention has an electrostatic shield provided at the top of a metal outlet pipe made of a semiconductor material having a certain degree of resistivity. This resistor prevents the generation of eddy current during leakage magnetic flux and eliminates local heating of the electrostatic shield.
[発明の実施例] 本発明の第1実施例を第4図においで説明する。[Embodiments of the invention] A first embodiment of the present invention will be explained with reference to FIG.
第1図乃至第3図の従来の箔巻変圧器と同一の部分につ
いては、同一符号を付して説明を省略する。The same parts as those of the conventional foil-wound transformer shown in FIGS. 1 to 3 are given the same reference numerals, and the description thereof will be omitted.
本実施例の箔巻変圧器において、口出しバイブロ1と絶
縁パイプ9とは止め具62によって接続され、この口出
しバイブロ1にお()る絶縁パイプとの接続箇所には、
環状をした静電シールド64が設けられている。この静
電シールド64は、半導体材料の1つである抵抗率10
−4〜106mΩ程度の導電性ゴムにより構成されてい
る。この静電シールド64は、口出しバイブロ1どは別
体でしかも口出しバイブロ1を両側から取り囲む様な半
割状に形成されている。この静電シールド64と口出し
バイブロ1との接続は、口出しバイブロ1の上部に設け
られたフランジ61aに、上記半割状の静電シールド6
4に設り1〔接続フランジ部65をボルト等を用いて取
付けることにより行なわれている。In the foil-wound transformer of this embodiment, the lead vibro 1 and the insulating pipe 9 are connected by a stopper 62, and the connection point with the insulating pipe on the lead vibro 1 is as follows.
An annular electrostatic shield 64 is provided. This electrostatic shield 64 is made of a semiconductor material with a resistivity of 10
It is made of conductive rubber of about -4 to 106 mΩ. The electrostatic shield 64 is separate from the leading vibro 1 and is formed in a half-shape so as to surround the leading vibro 1 from both sides. The electrostatic shield 64 and the outlet vibro 1 are connected to each other by attaching the half-shaped electrostatic shield 6 to the flange 61a provided on the upper part of the outlet vibro 1.
This is done by attaching the connecting flange portion 65 to 4 using bolts or the like.
この様な構成を有する本実施例の箔巻変圧器においては
、静電シールド64が半導体であるS電性ゴムで製作さ
れている為、静電シールド内を洩れ磁束が通過してもゴ
ムの電気抵抗によりうず電流が発生しにくくなり、静電
シールドの局部加熱を解消できる。従って、静電シール
ドの局部加熱による冷媒の加熱を生じることもない。ま
た、半導体は高電圧においては、良導体として作用ター
るから、巻線の高電位は静電シールド64に印加される
こととなり、パイプの接続部分や止め具62は静電シー
ルド64に覆われて電界が加わることがないので、この
部分からの絶縁破壊を防止できる。更に、本実施例にお
いては、静電シールドが)R電性ゴムによって形成され
ているので、静電シールドを押し型や注型等の手段で製
作することが可能となり、従来の金属製シールドに比較
すると、加工が容易となり製作工数や作業11間の短縮
が可能となる。In the foil-wound transformer of this embodiment having such a configuration, the electrostatic shield 64 is made of S-conductive rubber, which is a semiconductor, so even if magnetic flux leaks and passes through the electrostatic shield, the rubber Electrical resistance makes it difficult for eddy currents to occur, eliminating local heating of the electrostatic shield. Therefore, heating of the refrigerant due to local heating of the electrostatic shield does not occur. Furthermore, since semiconductors act as good conductors at high voltages, the high potential of the windings is applied to the electrostatic shield 64, and the pipe connections and stops 62 are covered with the electrostatic shield 64. Since no electric field is applied, dielectric breakdown from this part can be prevented. Furthermore, in this embodiment, since the electrostatic shield is made of R-conductive rubber, it is possible to manufacture the electrostatic shield by means such as pressing or casting. By comparison, processing becomes easier and the number of manufacturing steps and 11 operations can be shortened.
次に、第5図に示り′第2実施例の箔巻変圧器は、プラ
スチックや絶縁組等の絶縁材からなる芯材66の外周に
、半導体被覆67を施して静電シールI・を構成したも
のである。ここで半導体液!Ji67としては、薄い導
電性ゴムを芯材66の表面に密盾させI、:ものや、或
は芯材66の表面に導電性ゴムのエマルジョンその他の
半導体塗料をへケまたはスプレーで塗布したものを用い
る。Next, in the foil-wound transformer of the second embodiment shown in FIG. It is composed of Semiconductor liquid here! Ji67 is made by tightly shielding the surface of the core material 66 with thin conductive rubber, or by applying a conductive rubber emulsion or other semiconductor paint to the surface of the core material 66 by brushing or spraying. Use.
この第2実施例においても、前記第1実施例と同様の効
果を有することはもらろんであるが、半導体塗料を用い
た場合は、既存の静電シールドに対し塗料を塗布づ−る
だけで良いので、半導体製の静電シールドを製作するこ
とが極めて容易となり、しかもどの様な形状のものでも
製作可能である。It goes without saying that this second embodiment also has the same effect as the first embodiment, but when semiconductor paint is used, it is possible to simply apply the paint to the existing electrostatic shield. This makes it extremely easy to manufacture a semiconductor electrostatic shield, and it can also be manufactured in any shape.
なお、以上の実施例は本発明を箔巻変圧器に適用したも
のであるが、他の静止誘導電気機器についても同様に実
施できるものである。Although the above embodiments apply the present invention to a foil-wound transformer, the present invention can be similarly applied to other static induction electrical equipment.
[発明の効果]
以上の通り、本発明によれば、静電シールドにおけろう
ず電流の発生が防止され、口出しパイプ部分での局部加
熱による冷媒の加熱を防ぐことが可能となるから、冷却
効率が向上し、しかも口出しパイプの先端は電気的にシ
ールドされ電界集中が緩和されるので、絶縁破壊のおそ
れもなく、高圧大容量の静止誘導電気機器を提供できる
。また、 □静電シールドの製作や加工が容易で
ある為、機器製造に当っても作業時間が短縮できる効果
もある。[Effects of the Invention] As described above, according to the present invention, it is possible to prevent the generation of melting current in the electrostatic shield and to prevent heating of the refrigerant due to local heating at the outlet pipe. Efficiency is improved, and since the tip of the outlet pipe is electrically shielded and electric field concentration is alleviated, there is no fear of dielectric breakdown, and high-voltage, large-capacity static induction electrical equipment can be provided. In addition, since the electrostatic shield is easy to manufacture and process, it also has the effect of shortening work time when manufacturing equipment.
第1図は従来のけバレート弐箭巻変圧器の構造を示す断
面図、第2図(△)は従来の冷k】ダク(〜と絶縁バイ
ブの接続を示J−斜視図、第2図(8)は第2図く△)
の断面図、第3図(△)は従来の箔巻変圧器におりる冷
却ダク1〜と絶縁パイプの接わCを示ター斜祝図、第3
図(B)は′!53図(△)の断面図、第4図(A>は
本発明の第1実施例の斜視図、第4図(B)は第4図(
A>の断面図、第5図は本発明の他の実施例を示す断面
図である。
1・・・鉄心の脚部、2・・・金属シー1〜.3・・・
絶縁シート、4・・・低圧巻線、5・・・高圧巻線、6
・・・冷却ダクト、7・・・冷媒、8・・・ポンプ、9
・・・絶縁パイプ、10・・・尋液管、11・・・凝縮
器、12・・・水冷7、dI管、13・・・冷媒タンク
、14・・・絶縁媒体、15・・・変圧器タンク、16
・・・ヨーク鉄心、61・・・l」出しバイブ、62・
・・止め具、63.64・・・静電シールド、65・・
・接続7ランジ、66・・・芯材、67・・・半導体被
覆。
第1図
第 2 図
(A) (巳)第
3 図 (B)
第4図
(B)Figure 1 is a cross-sectional view showing the structure of a conventional double-wound transformer, Figure 2 (△) is a perspective view showing the connection between a conventional cooling duct and an insulating vibrator. (8) is △ in Figure 2)
Figure 3 (△) is a cross-sectional view of the conventional foil-wound transformer showing the connection C between the cooling ducts 1 and the insulating pipes.
Figure (B) is '! 53 (△) is a sectional view, FIG. 4 (A> is a perspective view of the first embodiment of the present invention, and FIG. 4 (B) is a cross-sectional view of FIG. 4 (
FIG. 5 is a cross-sectional view showing another embodiment of the present invention. 1... Legs of iron core, 2... Metal seams 1~. 3...
Insulating sheet, 4...Low voltage winding, 5...High voltage winding, 6
...Cooling duct, 7...Refrigerant, 8...Pump, 9
... Insulated pipe, 10 ... Liquid pipe, 11 ... Condenser, 12 ... Water cooling 7, dI pipe, 13 ... Refrigerant tank, 14 ... Insulating medium, 15 ... Transformer vessel tank, 16
...Yoke iron core, 61...L" out vibe, 62.
... Stopper, 63.64 ... Electrostatic shield, 65...
- Connection 7 lange, 66...core material, 67...semiconductor coating. Figure 1 Figure 2 (A) (Snake) Figure 3 (B) Figure 4 (B)
Claims (4)
多数回巻f」けて箔状巻線を形成し、この箔状巻線間に
金属製の冷却ダクトを内蔵し、この冷却ダクトに設りた
金属製口出しバイブを絶縁パイプに接続し、この絶縁バ
イブを金属製の導液管を経て冷却装置に接続した静止誘
導電気機器において、「」出しバイブにお()る絶縁パ
イプどの連結部分に環状の静電シールドを設(Jlこの
静電シールドを゛16導体(ΔIslから1・14成し
たことを特徴とげる静止誘導電気機器1、(1) A foil winding is formed by wrapping a metal sheet around the leg of the iron core many times through an insulating sheet, and a metal cooling duct is built in between the foil windings. In stationary induction electrical equipment, in which a metal outlet vibrator installed at A static induction electric device 1 characterized in that a ring-shaped electrostatic shield is provided at the connecting part (Jl).
なる特許請求の範囲第1項記載の静止誘導電気機器。(2) The static induction electric device according to claim 1, wherein the electrostatic shield is made of conductive rubber that is a semiconductor.
’F電性ゴムを密着させたものである特許請求の範囲第
1項記載の静止誘導電気機器。(3) The electrostatic shield has a semiconductor on its surface.
The stationary induction electric device according to claim 1, wherein the electric rubber is adhered to the stationary induction electric device.
したものである特許請求の範囲第1項記載の静止誘導電
気機器。(4) The static induction electric device according to claim 1, wherein the electrostatic shield has a surface coated with a semiconductor sake bottle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58071354A JPS59197115A (en) | 1983-04-25 | 1983-04-25 | Stationary induction electric apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58071354A JPS59197115A (en) | 1983-04-25 | 1983-04-25 | Stationary induction electric apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59197115A true JPS59197115A (en) | 1984-11-08 |
Family
ID=13458069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58071354A Pending JPS59197115A (en) | 1983-04-25 | 1983-04-25 | Stationary induction electric apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59197115A (en) |
-
1983
- 1983-04-25 JP JP58071354A patent/JPS59197115A/en active Pending
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