JPS6138844B2 - - Google Patents

Description

【発明の詳細な説明】 本発明は超々高圧大容量用に使用する単相変圧
器、特に２分割した単位変圧器を組合せて構成す
る単相変圧器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single-phase transformer used for ultra-super high voltage and large capacity, and particularly to a single-phase transformer constructed by combining two unit transformers.

送電系統の超々高圧大容量化に伴ない、この系
統に使用する変圧器も必然的に大形となつてお
り、１台で３相変圧器を製作することは、輸送限
界高さや重量、いわゆる輸送制限のために不可能
となつている。 As the power transmission system becomes ultra-high voltage and large capacity, the transformers used in this system are inevitably becoming larger, and manufacturing a 3-phase transformer in one unit is difficult due to the limited height and weight of transportation. Transportation restrictions make this impossible.

このため、従来より３相変圧器に３台を単成変
圧器に分割製作し、現地据付時に３相結線する特
別３相変圧器方式や、３相変圧器を相別にタンク
や鉄心及び巻線を分割製作して輸送し、据付現地
において組立を行う方式などが提案されている。 For this reason, conventional 3-phase transformers have been manufactured separately into 3 single-component transformers, and the 3-phase wires are connected at the time of on-site installation. A method has been proposed in which the system is manufactured in parts, transported, and assembled at the installation site.

これらのうち、特別３相変圧器方式は一般的に
実施されているが、最近のような変圧器の容量の
増大によつて、単相変圧器を更に小さな単位変圧
器に分割して製作する必要が生じている。特に、
500KV級の系統では、変電所が山間僻地に設置す
る例が多くなるから、更に輸送寸法及び重量を小
さくせねばならない。 Among these, the special three-phase transformer method is generally implemented, but with the recent increase in the capacity of transformers, the single-phase transformer is divided into smaller unit transformers. A need has arisen. especially,
In 500KV class systems, substations are often installed in remote mountainous areas, so transport dimensions and weight must be further reduced.

一般に、特別３相変圧器を構成する超々高圧の
単相変圧器は、第１図イ，ロ，ハに示すように鉄
道などの輸送限界から、鉄心４や巻線５などの変
圧器中身を収納するため、下タンク２Ａと本体カ
バー２Ｂからなるタンク１の幅Ｂや高さＨが制限
を受ける。このため、鉄心４には単相５脚鉄心を
用いて高さを低くし、この各主脚にそれぞれ単位
容量を小さくして幅を狭くした巻線５を配置し、
これら巻線５をリード線８にて並列に接続して、
タンク１に設けるポケツト６へ樹立する高圧端子
７に至るように構成している。図中９は低圧端
子、１０は３次端子、１１は中性点端子である。
このような単相変圧器の輸送は、各端子類を取外
した本体カバー輸送か、或いはタンク１の本体カ
バー２Ｂに代えて輸送カバー２Ｃを下タンク２Ａ
に取付け、輸送高さ寸法を低くした状態で行なわ
れる。したがつて、輸送カバー２Ｃによる輸送時
には本体カバー２Ｂ上の低圧端子９、３次端子１
０、中性点端子１１及びこれらと接続するリード
線（図示せず）、更には高圧端子７とそのポケツ
ト６を取外して行なつている。 In general, the ultra-high voltage single-phase transformer that constitutes the special three-phase transformer requires the contents of the transformer, such as the iron core 4 and winding 5, to be removed due to the transportation limitations of railways, etc., as shown in Figure 1 A, B, and C. Due to storage, the width B and height H of the tank 1 consisting of the lower tank 2A and the main body cover 2B are limited. For this reason, the iron core 4 is made low in height by using a single-phase five-leg iron core, and a winding 5 with a smaller unit capacity and narrower width is arranged on each of the main legs.
These windings 5 are connected in parallel with lead wires 8,
The high voltage terminal 7 is connected to a pocket 6 provided in the tank 1. In the figure, 9 is a low voltage terminal, 10 is a tertiary terminal, and 11 is a neutral point terminal.
To transport such a single-phase transformer, transport the main body cover with all terminals removed, or replace the main body cover 2B of tank 1 with transport cover 2C and lower tank 2A.
It is installed on the vehicle and transported with a reduced height dimension. Therefore, during transportation using the transportation cover 2C, the low voltage terminal 9 and the tertiary terminal 1 on the main body cover 2B
0, the neutral point terminal 11 and the lead wires (not shown) connected thereto, as well as the high voltage terminal 7 and its pocket 6 are removed.

上記のような単相変圧器の構造は、その幅Ｂ及
び高さＨが制限される場合には一般的であるが、
特に鉄道輸送のときには長さＬの制限から、単相
５脚以上の構成は困難であり、また更に巻線の数
を増していくと変圧器中身の総重量が増大してし
まうので、これによつても制限を受けることにな
る。 The structure of a single-phase transformer as described above is common when its width B and height H are limited, but
Particularly when transporting by rail, it is difficult to construct a configuration with five or more single-phase legs due to the restriction on length L, and further increasing the number of windings increases the total weight of the transformer. However, you will still be subject to restrictions.

それ故、単相変圧器の輸送重量が据付場所によ
つて制約を受けるときには、第１図の構造に代え
て第２図イ，ロに示すような構造も提案されてい
る。この単相変圧器２０は、分割形成した２台の
単位変圧器２１，２２を組合せて構成するもの
で、各単位変圧器２１，２２はそれぞれ２つの主
脚と２つの側脚を有する単相４脚鉄心２４を用
い、この各主脚にそれぞれ巻線２５を巻装した変
圧器中身２３をタンク２６内に配置している。こ
れら各単位変圧器２１，２２の各巻線２５から引
出す低圧端子２７、３次端子２８、中性点端子２
９への各リード線（図示せず）は、タンク２６の
上方空間を通して、各タンク２６間を連結する接
続油道３０内で接続するようにしており、また巻
線２５の外周に沿つて引出す各高圧リード線３４
は、タンク２６間を側面で結合する接続箱３１内
に導びき、接続箱３１に設けたポケツト３２に樹
立した高圧端子３３と接続している。 Therefore, when the transport weight of a single-phase transformer is restricted by the installation location, structures such as those shown in FIGS. 2A and 2B have been proposed in place of the structure shown in FIG. This single-phase transformer 20 is constructed by combining two unit transformers 21 and 22 that are formed separately, and each unit transformer 21 and 22 is a single-phase transformer that has two main legs and two side legs. A transformer body 23 in which a four-leg iron core 24 is used and a winding 25 is wound around each of the main legs is arranged in a tank 26. A low voltage terminal 27, a tertiary terminal 28, and a neutral terminal 2 drawn out from each winding 25 of each unit transformer 21, 22.
Each lead wire (not shown) to 9 passes through the space above the tank 26 and is connected in a connection oil pipe 30 that connects each tank 26, and is also led out along the outer periphery of the winding 25. Each high voltage lead wire 34
is led into a junction box 31 that connects the tanks 26 on its side, and is connected to a high voltage terminal 33 established in a pocket 32 provided in the junction box 31.

しかし、このような２台の単位変圧器２１，２
２を組合せて構成する単相変圧器では、低圧端子
２７の絶縁階級が大きいと、これに接続するリー
ド線は長大となり接続油道３０も大きくせねばな
らないし、高圧リード線３４は鉄心２４とタンク
２６間の狭い空間部分を屈曲して通るため、その
構造及び絶縁も極めて難しくなる。また、高圧端
子３３は長く重量も大きいので、タンク２６間を
側面で連結する接続箱３１だけでは十分な支持が
行なえず、補強構造が大掛りとなつてしまう欠点
がある。 However, such two unit transformers 21, 2
In a single-phase transformer configured by combining 2, if the insulation class of the low voltage terminal 27 is high, the lead wire connected to it will be long and the connecting oil pipe 30 must also be made large, and the high voltage lead wire 34 is connected to the iron core 24. Since it bends and passes through the narrow space between the tanks 26, its structure and insulation become extremely difficult. Furthermore, since the high voltage terminals 33 are long and heavy, the junction box 31 that connects the tanks 26 on their sides cannot provide sufficient support, resulting in a large-scale reinforcement structure.

本発明の単相変圧器の目的は、これを構成する
単位変圧器の各リード線の接続空間を確保して絶
縁を容易に且確実に行えるようにすると共に、各
タンク間の結合部を利用して高圧端子を強固に支
持できるようにすることにある。 The purpose of the single-phase transformer of the present invention is to secure connection space for each lead wire of the unit transformers that make up the transformer, so that insulation can be easily and reliably performed, and to utilize the joint between each tank. The purpose is to firmly support the high voltage terminal.

上記の目的を達成するため、本発明では長手方
向の端面に開口部を設ける各タンク内に、主脚と
少なくとも一端を自由端とした上下の継鉄からな
る鉄心と、この主脚に巻装する巻線とを備える変
圧器中身を収納して単位変圧器を構成し、これら
単位変圧器をタンクの開口部が対向するように配
置し、この開口部間を高圧端子を樹立するポケツ
トを設ける接続タンクにて連結し、この内部で各
鉄心の継鉄間を結合すると共に、各巻線からのリ
ード線を接続するようにしたことを特徴とするも
のである。 In order to achieve the above object, the present invention includes an iron core consisting of a main leg and upper and lower yokes with at least one free end, which is wrapped around the main leg, in each tank having an opening in the longitudinal end face. A unit transformer is constructed by accommodating the contents of a transformer having a winding wire, and these unit transformers are arranged so that the openings of the tank face each other, and a pocket is provided between the openings for establishing a high voltage terminal. The yoke of each iron core is connected within the connection tank, and the lead wires from each winding are connected.

以下、本発明の単相変圧器を第３図から第５図
を用いて説明する。 Hereinafter, the single-phase transformer of the present invention will be explained using FIGS. 3 to 5.

本発明の一実施例である第３図イ，ロの単相変
圧器４０は、それぞれタンク４６内に鉄心４４と
この主脚に巻線４５を巻装してなる変圧器中身４
３を収納した２台の単位変圧器４１，４２を組合
せて構成する。この単位変圧器４１，４２の各タ
ンク４６は、その長手方向の対向端面に開口部４
６Ａを設け、この対向させるタンク４６の端面間
に配置する接続タンク５０によつて両者間を一体
に結合する。この接続タンク５０には、連通用の
開口の他高圧端子（図示せず）を樹立するポケツ
ト５１が一体に、或いは着脱自在に設けられて輸
送制限に対処することのできるようにする。単位
変圧器４１，４２の変圧器中身４３となる鉄心４
４は、それぞれこの例では２つの主脚と１つの側
脚とこれら間を磁気的に結合して一端を自由端と
する上下の継鉄とによつて、不完全な磁気回路の
状態に構成し、各主脚に巻線４５を巻装して使用
される。各鉄心４４の上下の継鉄の自由端は、タ
ンク４６間を接続タンク５０にて一体に結合した
後、接続タンク５０内の空間を利用し、接続用鉄
心５２，５３にて磁気的に結合され、これによつ
て単相変圧器４０は完全な磁気回路を備えた単相
６脚鉄心構成となる。各鉄心４４の主脚に巻線４
５から引出され、各タンク４６上に取付ける低圧
端子４７、３次端子４８、中性点端子４９へのリ
ード線（図示せず）は、接続タンク５０内の空間
を利用して接続される。また、巻線４５の外周に
沿つて引出す高圧リード線５４は、接続タンク５
０内に位置する上下の接続用鉄心５２，５３に挾
まれる空間部分に導き、予じめ接続タンク５０内
に配置して高圧端子（図示せず）と接続する接続
用リード線５４Ａと接続するか、或いは直接高圧
端子まで導びいて接続して単相変圧器を構成す
る。このように、高圧リード線５４を接続タンク
５０内の空間に導びき高圧端子との接続を行なう
ようにすれば、不用空間を活用できる上、高圧リ
ード線５４の絶縁が簡単に行える。また、接続及
び絶縁作業は各タンク４６間を接続タンク５０に
て一体に結合した状態で、接続タンク５０内に入
つて行えるため、変圧器中身４３の露出は開口部
４６Ａを接続するのみであり、その後の作業は空
調設備をタンクに取付けて行えるから、絶縁物の
吸湿などを最小限に抑制することが可能になる。
しかも、単位変圧器４１，４２側とは別の独立し
た接続タンク５０に、高圧端子のポケツト５１を
設けているため、高圧端子の支持も強固に行え
る。 The single-phase transformers 40 shown in FIGS. 3A and 3B, which are embodiments of the present invention, each have a transformer contents 4 consisting of an iron core 44 in a tank 46 and a winding 45 wound around the main leg.
The transformer is constructed by combining two unit transformers 41 and 42 each containing a transformer. Each tank 46 of the unit transformers 41, 42 has an opening 4 on the opposite end surface in the longitudinal direction.
6A, and a connection tank 50 disposed between the end faces of the opposing tanks 46 connects them together. In addition to a communication opening, a pocket 51 for establishing a high voltage terminal (not shown) is integrally or detachably provided in the connection tank 50 to cope with transportation restrictions. Iron core 4 which becomes transformer contents 43 of unit transformers 41 and 42
4 is configured in an incomplete magnetic circuit by, in this example, two main legs, one side leg, and upper and lower yokes that magnetically connect these legs and have one end as a free end. However, each main landing gear is used with a winding 45 wound around it. The free ends of the upper and lower yokes of each iron core 44 are connected together between the tanks 46 at a connecting tank 50, and then magnetically connected using the space inside the connecting tank 50 at connecting iron cores 52 and 53. Thus, the single-phase transformer 40 has a single-phase six-legged core configuration with a complete magnetic circuit. Winding 4 on the main leg of each iron core 44
Lead wires (not shown) drawn out from the connection tank 50 and attached to the low voltage terminal 47, the tertiary terminal 48, and the neutral point terminal 49 are connected using the space inside the connection tank 50. In addition, a high voltage lead wire 54 drawn out along the outer periphery of the winding 45 is connected to the connection tank 5.
0 and connected to a connecting lead wire 54A placed in the connecting tank 50 in advance and connected to a high voltage terminal (not shown). Alternatively, connect it directly to the high-voltage terminal to form a single-phase transformer. By leading the high voltage lead wire 54 into the space within the connection tank 50 and connecting it to the high voltage terminal in this manner, unnecessary space can be utilized and the high voltage lead wire 54 can be easily insulated. Furthermore, since the connection and insulation work can be carried out by entering the connection tank 50 while the tanks 46 are integrally connected by the connection tank 50, the transformer contents 43 are exposed only by connecting the opening 46A. Since the subsequent work can be carried out with the air conditioning equipment attached to the tank, it is possible to minimize moisture absorption by the insulation.
Moreover, since the pocket 51 for the high voltage terminal is provided in the connection tank 50 which is separate from the unit transformers 41 and 42, the high voltage terminal can be firmly supported.

単相変圧器４０を構成する各単位変圧器４１，
４２の輸送は、第４図イ，ロに示すように各タン
ク４６に形成した開口部にカバー５５を取付けて
行ない、据付現地において中央に接続タンク５０
を配置して対向させ、それぞれカバー５５を取外
して一体に結合する。 Each unit transformer 41 that constitutes the single-phase transformer 40,
42 is transported by attaching a cover 55 to the opening formed in each tank 46 as shown in FIG.
are arranged to face each other, and the covers 55 are removed from each, and they are joined together.

本発明の第５図イ，ロに示す単相変圧器６０の
実施例は、各単位変圧器６１，６２のうち、一方
は２つの主脚と１つの側脚及びこれらを結合する
上下の継鉄からなる鉄心６４と各主脚の巻線６５
などからなる変圧器中身６３をタンク６６内に収
納しており、また他方は１つの主脚と１つの側脚
及び上下の継鉄からなる鉄心６８と主脚に巻装し
た巻線６９などからなる変圧器中身６７を収納し
て構成しており、上記した例と同様両タンク６
６，７０間は接続タンク７１にて一体に連結し、
対向した鉄心６５，６８の上下の継鉄の自由端
は、接続用鉄心にて磁気的に結合し、これによつ
て単相変圧器６０が完全な単相５脚鉄心構成とな
るようにしたもので、他の点については前述の例
と同一である。このようにすれば、上述の効果を
達成すると共に、単相変圧器の長さ寸法を小さく
することができる。 The embodiment of the single-phase transformer 60 shown in FIGS. Iron core 64 made of iron and windings 65 of each main landing gear
The contents of the transformer 63 are stored in a tank 66, and the other is an iron core 68 consisting of one main leg, one side leg, and upper and lower yokes, and a winding 69 wrapped around the main leg. It is constructed by storing the transformer contents 67, and as in the above example, both tanks 6
6 and 70 are integrally connected by a connecting tank 71,
The free ends of the upper and lower yokes of the opposing iron cores 65 and 68 are magnetically coupled by a connecting iron core, so that the single-phase transformer 60 has a complete single-phase five-legged iron core configuration. This is the same as the previous example in other respects. In this way, the above-mentioned effects can be achieved and the length dimension of the single-phase transformer can be reduced.

本発明の単相変圧器では、その鉄心構造は上記
の例に限らず単相２脚鉄心、或いは単相４脚鉄心
でも適用できる。また、各単位変圧器の一方或い
は双方に、負荷時タツプ切換器や負荷時電圧調整
変圧器などを接続若しくは内臓させて、電圧の調
整が行なえるようにすることもできる。 In the single-phase transformer of the present invention, the core structure is not limited to the above example, and a single-phase two-legged core or a single-phase four-legged core can also be applied. Further, an on-load tap changer, an on-load voltage adjustment transformer, etc. may be connected to or incorporated in one or both of the unit transformers to adjust the voltage.

本発明のように単相変圧器を構成すれば、単位
変圧器のタンク間をその長手方向の対向面間に配
置する接続タンクにて一体に結合し、接続タンク
内の空間部を利用して各鉄心の上下継鉄間を接続
用鉄心で磁気的に結合すると共に、各高圧リード
線間の接続及び絶縁作業を行うので、広い作業空
間内で容易に行なえ、しかも高圧リード線の絶縁
も確実に施せるのでその信頼性も向上でき、また
接続タンクに高圧端子を樹立するポケツトを設け
たので、高圧端子の支持が強固となるし、高圧リ
ード線との接続も簡単になるなどの効果がある。 If a single-phase transformer is configured as in the present invention, the tanks of the unit transformers are connected together by a connection tank placed between their longitudinally opposing surfaces, and the space inside the connection tank is utilized. The upper and lower yoke of each iron core are magnetically coupled using a connecting iron core, and the connection and insulation work between each high voltage lead wire is performed, so it can be easily carried out in a large work space, and the insulation of the high voltage lead wires is also ensured. Since it can be applied to the terminal, its reliability can be improved, and since the connection tank has a pocket for establishing the high voltage terminal, the support for the high voltage terminal is strong, and the connection with the high voltage lead wire is also easy. .

【図面の簡単な説明】[Brief explanation of the drawing]

第１図イは従来の単相変圧器の概略側面図、第
１図ロはイの概略正面図、第１図ハはロの概略平
面図、第２図イは従来の他の単相変圧器の概略平
面図、第２図ロはイの概略正面図、第３図イは本
発明の単相変圧器の一実施例を示す概略平面図、
第３図ロはイの概略正面図、第４図イおよびロは
第３図イおよびロの解体状態を示す概略平面図と
概略正面図、第５図イは本発明の単相変圧器の他
の例を示す概略平面図、第５図ロはイの概略正面
図である。 ４０……単相変圧器、４１，４２……単位変圧
器、４３……変圧器中身、４４……鉄心、４５…
…巻線、４６……タンク、４６Ａ……開口部、５
０……接続タンク、５１……ポケツト、５２，５
３……接続用鉄心、５４……高圧リード線、５４
Ａ……接続用リード線。 Figure 1 (a) is a schematic side view of a conventional single-phase transformer, Figure 1 (b) is a schematic front view of (a), Figure 1 (c) is a schematic plan view of (b), and Figure 2 (a) is another conventional single-phase transformer. A schematic plan view of the transformer, FIG. 2B is a schematic front view of FIG. 3A, and FIG.
Figure 3B is a schematic front view of the single-phase transformer of the present invention, Figures 4A and 4B are a schematic plan view and front view showing the disassembled state of Figures 3A and 3B, and Figure 5A is a schematic front view of the single-phase transformer of the present invention. FIG. 5B is a schematic plan view showing another example, and FIG. 5B is a schematic front view of FIG. 40... Single phase transformer, 41, 42... Unit transformer, 43... Transformer contents, 44... Iron core, 45...
...Winding, 46...Tank, 46A...Opening, 5
0...Connection tank, 51...Pocket, 52,5
3... Connection core, 54... High voltage lead wire, 54
A... Connection lead wire.

Claims (1)

【特許請求の範囲】 １ 少なくとも２つの単位変圧器を並置し、該単
位変圧器間を機械的及び電気的に接続するものに
おいて、前記単位変圧器はそれぞれ長手方向端面
に開口部を設けるタンク内に、主脚と少なくとも
一端を自由端とする上下の継鉄からなる鉄心と前
記主脚に巻装する巻線とを備える変圧器中身を収
納して構成し、前記各単位変圧器をタンクの開口
部が対向するように配置し、該開口部間に高圧端
子を樹立するポケツトを設ける接続タンクを配置
して前記タンク間を連結し、前記接続タンクの空
間内で前記各鉄心間の上下継鉄間を接続用鉄心に
て磁気的に結合すると共に、各巻線からのリード
線を接続したことを特徴とする単相変圧器。 ２ 特許請求の範囲第１項において、前記接続タ
ンクのポケツトは着脱自在に形成したことを特徴
とする単相変圧器。 ３ 特許請求の範囲第１項において、前記接続タ
ンク内には高圧端子と接続する高圧リード線の一
部となる接続用リード線を配置し、該接続用リー
ド線と前記各巻線からの高圧リード線とを接続し
たことを特徴とする単相変圧器。[Claims] 1. At least two unit transformers are juxtaposed and the unit transformers are mechanically and electrically connected, and each of the unit transformers is located in a tank having an opening in its longitudinal end face. The transformer is constructed by housing the contents of a transformer comprising a main leg, an iron core consisting of an upper and lower yoke with at least one free end, and a winding wound around the main leg, and each of the unit transformers is connected to a tank. Connecting tanks are arranged such that their openings face each other and have pockets for establishing high-voltage terminals between the openings, and the tanks are connected, and upper and lower joints between each of the iron cores are formed within the space of the connecting tank. A single-phase transformer characterized by magnetically coupling the iron parts with a connecting iron core and connecting lead wires from each winding. 2. The single-phase transformer according to claim 1, wherein the pocket of the connection tank is formed to be detachable. 3. In claim 1, a connection lead wire that becomes a part of a high voltage lead wire connected to a high voltage terminal is arranged in the connection tank, and the connection lead wire and the high voltage leads from each of the windings are disposed in the connection tank. A single-phase transformer characterized by being connected to a line.