JPH025281B2 - - Google Patents
Info
- Publication number
- JPH025281B2 JPH025281B2 JP56187799A JP18779981A JPH025281B2 JP H025281 B2 JPH025281 B2 JP H025281B2 JP 56187799 A JP56187799 A JP 56187799A JP 18779981 A JP18779981 A JP 18779981A JP H025281 B2 JPH025281 B2 JP H025281B2
- Authority
- JP
- Japan
- Prior art keywords
- tap
- winding
- phase
- windings
- transformer
- 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
- 238000004804 winding Methods 0.000 claims description 55
- 230000005284 excitation Effects 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 230000004907 flux Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000009413 insulation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Description
【発明の詳細な説明】
発明の技術分野
本発明は変圧器に係り、特に負荷時電圧調整を
行うに好適な変圧器の構造に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a transformer, and more particularly to a structure of a transformer suitable for adjusting voltage under load.
発明の技術的背景
近年、電力需要の増大に伴い、送電電圧も高く
なり、変圧器も超々高圧、大容量化をたどり、現
在はバンク容量1500MVAの500kV単巻変圧器も
製作、運転されている。Technical background of the invention In recent years, as the demand for electricity has increased, the transmission voltage has also increased, and transformers have also become extremely high voltage and large in capacity.Currently, 500kV autotransformers with a bank capacity of 1500MVA are also manufactured and in operation. .
このような大形変圧器の電圧調整を行う場合、
タツプ巻線を主変圧器内に設けると、寸法、重量
がふえ鉄道輸送などの輸送制限内に抑えることが
できなくなる。そこで、タツプ巻線をもたない主
変圧器と負荷時電圧調整器を組み合わせて電圧調
整を行う方法がとられているのは周知の通りであ
る。 When adjusting the voltage of such a large transformer,
If a tap winding is provided within the main transformer, the size and weight will increase and it will not be possible to keep it within transportation limits such as rail transportation. Therefore, as is well known, a method is used in which the voltage is adjusted by combining a main transformer without tap windings and a load voltage regulator.
第1図は、そのような負荷時電圧調整器を構成
する励磁変圧器の従来例を示したもので、aはそ
の構成図、bはその結線図である。図において、
1は単相三脚鉄心で、主脚には励磁巻線2とタツ
プ巻線3が巻かれている。このタツプ巻線3の素
線あるいはタツプ切換器との接続リード線は、図
には1本しか示されていないが、2回路あるいは
3回路並列構成として3相用負荷時タツプ切換器
の各相セレクターに対応接続し、小形のタツプ切
換器を使用できるようにしている例もある。 FIG. 1 shows a conventional example of an excitation transformer constituting such an on-load voltage regulator, in which a is a block diagram thereof and b is a wiring diagram thereof. In the figure,
1 is a single-phase tripod iron core, and an excitation winding 2 and a tap winding 3 are wound around the main leg. Although only one wire of this tap winding 3 or a lead wire connecting it to the tap changer is shown in the figure, it can be configured as a two-circuit or three-circuit parallel configuration for each phase of the tap changer at the time of a three-phase load. In some cases, it is connected to a selector so that a small tap changer can be used.
技術的背景の問題点
ところが最近は、電力需要の伸びから増々変圧
器単器あたりの容量増加が要求され、また、系統
運用を容易にすべく電圧調整幅を大きくしたいと
いう要求が大きくなつてきている。このような要
求を満たすためには、負荷時電圧調整器もその容
量あるいはタツプ電圧を大きくしなければならな
くなる。この場合、上記従来構成では、巻線1脚
あたりでサージ侵入時に誘起する全タツプ電圧に
耐える絶縁が必要となるから、タツプ電圧の増大
に伴つてタツプ巻線3内の絶縁強化が必要とな
り、巻線の大形化、機器の重量増加を招く欠点が
でてくる。Problems in the technical background Recently, however, there has been a growing demand for increased capacity per transformer due to the growth in power demand, and there has also been a growing demand for a wider voltage adjustment range to facilitate grid operation. There is. In order to meet such requirements, the on-load voltage regulator must also increase its capacity or tap voltage. In this case, in the conventional configuration described above, each leg of the winding requires insulation that can withstand the entire tap voltage induced when a surge enters, so as the tap voltage increases, it is necessary to strengthen the insulation within the tap winding 3. The drawback is that the winding becomes larger and the weight of the device increases.
発明の目的
本発明は上述した点を考慮し、軽量化をはかる
と共に損失の少ない変圧器を提供することを目的
とする。OBJECTS OF THE INVENTION The present invention takes the above-mentioned points into consideration and aims to provide a transformer that is light in weight and has less loss.
発明の概要
この目的を達成するため、本発明は、鉄心には
単相二脚鉄心を用い、この二つの主脚にそれぞれ
内側からタツプ巻線、励磁巻線を順に巻回し、そ
の二つの脚の励磁巻線同士は並列接続する一方、
タツプ巻線同士は直列接続して全体のタツプ巻線
を形成して変圧器を構成し、三相にする場合は、
これを3個組み合わせるようにしたことを特徴と
する。Summary of the Invention In order to achieve this object, the present invention uses a single-phase two-leg iron core, and winds a tap winding and an excitation winding around each of the two main legs in order from the inside. While the excitation windings of are connected in parallel,
Tap windings are connected in series to form the entire tap winding to form a transformer, and when making a three-phase transformer,
The feature is that three of these are combined.
発明の実施例
以下、本発明の実施例を図面を参照して説明す
る。Embodiments of the Invention Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第2図は、本発明の一実施例に係る単相負荷時
電圧調整器を構成する励磁変圧器を示したもの
で、aはその構造図、bはその結線図である。 FIG. 2 shows an excitation transformer constituting a single-phase on-load voltage regulator according to an embodiment of the present invention, in which a is a structural diagram thereof and b is a wiring diagram thereof.
図において、鉄心は二つの脚11,12および
継鉄からなる単相二脚鉄心で構成され、その鉄心
脚内側からタツプ巻線31、励磁巻線21および
タツプ巻線32、励磁巻線22が順に同心状に巻
かれている。その励磁巻線21,22は、図示の
如く並列接続される一方、タツプ巻線31,32
は、直列接続されて全体のタツプ巻線が構成され
ている。従つて、タツプ巻線31,32は、それ
ぞれ全タツプ巻線の約半分ずつの容量をもつてい
る。 In the figure, the iron core is composed of a single-phase two-legged iron core consisting of two legs 11 and 12 and a yoke, and from the inside of the iron core legs, a tap winding 31, an excitation winding 21, a tap winding 32, and an excitation winding 22 are connected. They are wound concentrically in order. The excitation windings 21 and 22 are connected in parallel as shown, while the tap windings 31 and 32 are connected in parallel.
are connected in series to form the entire tap winding. Therefore, the tap windings 31 and 32 each have a capacity approximately half that of all the tap windings.
上記構成によれば、タツプ巻線31,32は直
列接続であることから、各タツプ巻線の分担電圧
は全タツプ巻線の分担電圧の約半分程度となる。
従つて、タツプ巻線の電圧が大きくなつても、各
タツプ巻線31,32内の絶縁強化は、前記従来
例に比べて少なくすることができ、タツプ巻線の
大形化を防ぐことができる。また、タツプリード
4の全体の本数は、各タツプ巻線31,32に分
散される結果、引き出し構造が簡単になる。 According to the above configuration, since the tap windings 31 and 32 are connected in series, the shared voltage of each tap winding is about half of the shared voltage of all the tap windings.
Therefore, even if the voltage of the tap winding increases, the insulation reinforcement within each tap winding 31, 32 can be reduced compared to the conventional example, and it is possible to prevent the tap winding from increasing in size. can. In addition, the total number of tap leads 4 is distributed among the tap windings 31 and 32, which simplifies the lead-out structure.
更に、タツプ巻線を励磁巻線の内側に巻くこと
から巻線もれ磁束による源遊損も低減できる。こ
れを第3図、第4図を参照して説明する。尚、こ
れらの図においては、説明を簡単にするため、脚
11,12内の巻線は省略して示している。 Furthermore, since the tap winding is wound inside the excitation winding, source loss due to winding leakage magnetic flux can also be reduced. This will be explained with reference to FIGS. 3 and 4. Incidentally, in these figures, the windings in the legs 11 and 12 are omitted to simplify the explanation.
即ち、第3図に示すようにタツプ巻線31,3
2を励磁巻線21,22の外側に巻いた場合は、
励磁巻線21,22は並列接続されているから、
鉄心脚11,12内を通る主磁束51,52は等
しくなつて、二つの励磁巻線に同一の電圧を誘起
させることになる。従つて、巻線22,32の通
電による巻線もれ磁束6は鉄心脚内に入れず、殆
どタンク壁7などの外部に流れる。このため、タ
ンク壁7での漂遊損増大、ひいては局部加熱など
を引き起こすおそれがある。 That is, as shown in FIG.
2 is wound outside the excitation windings 21 and 22,
Since the excitation windings 21 and 22 are connected in parallel,
The main magnetic fluxes 51 and 52 passing through the core legs 11 and 12 become equal and induce the same voltage in the two excitation windings. Therefore, the winding leakage magnetic flux 6 due to the energization of the windings 22 and 32 does not enter the core leg, but almost flows to the outside, such as the tank wall 7. For this reason, there is a risk that stray loss on the tank wall 7 will increase and local heating may occur.
これに対して、本実施例の場合は、第4図に示
すように、外側にある励磁巻線21,22内の磁
束量が同一となつて同じ電圧を誘起する。このた
め、巻線22,32の通電による巻線もれ磁束8
は、第3図とは逆に鉄心内に入つて循環するよう
に流れる。この場合、鉄心はすぐれた低損失の材
質であることから、このもれ磁束による漂遊損発
生が非常に少なくなる。 On the other hand, in the case of this embodiment, as shown in FIG. 4, the amount of magnetic flux in the outer excitation windings 21 and 22 is the same, and the same voltage is induced. For this reason, the winding leakage magnetic flux 8 due to the energization of the windings 22 and 32
Contrary to FIG. 3, the gas enters the core and flows in a circular manner. In this case, since the iron core is made of an excellent low-loss material, the stray loss caused by this leakage magnetic flux is extremely reduced.
以上、片方のタツプ巻線にだけ電流が流れる極
端な場合について説明したが、容量が2つの脚で
多少異なるタツプ位置の場合も同様のことが言え
る。 Although the extreme case in which current flows only in one tap winding has been described above, the same can be said in the case where the capacitances of the two legs are at slightly different tap positions.
従つて、本実施例によれば、漂遊損失も少な
く、かつ、大容量器では過熱防止など品質上もす
ぐれた単相負荷時電圧調整器が得られる。 Therefore, according to this embodiment, a single-phase on-load voltage regulator can be obtained which has low stray loss and is excellent in quality such as overheat prevention in a large capacity device.
尚、上記実施例で説明した単相負荷時電圧調整
器を3個組み合わせれば、三相負荷時電圧調整器
が得られることは言う迄もない。 It goes without saying that a three-phase on-load voltage regulator can be obtained by combining three single-phase on-load voltage regulators explained in the above embodiments.
この場合、3個の単相電圧調整器は、油中ダク
トなどで接続してもよいし、あるいは中身を3個
1つのタンク内に設置して構成してもよいことは
勿論のことである。また、単相器でも三相器で
も、従来例で説明したように2回路、3回路のタ
ツプ素線、リード線の並列構成としてもよいこと
も当然のことである。更に、上記実施例では、説
明の都合上、タツプ巻線の途中からタツプリード
を引き出した図で説明したが、実際には、円筒状
に各タツプ巻線を巻き、巻線上下端から各タツプ
リードを引き出すことが多いことは言う迄もな
い。更にまた、上記実施例では、負荷時電圧調整
器を例にとつて説明したが、本発明はこれに限ら
ず、例えばタツプ切換変圧器等でもよいことは勿
論である。 In this case, it goes without saying that the three single-phase voltage regulators may be connected through an oil submerged duct, or the contents may be installed in one tank. . Furthermore, whether it is a single-phase device or a three-phase device, it goes without saying that a parallel configuration of two or three circuits of tapped wires and lead wires may be used as explained in the conventional example. Furthermore, in the above embodiment, for convenience of explanation, the tap lead is drawn out from the middle of the tap winding, but in reality, each tap winding is wound in a cylindrical shape, and each tap lead is pulled out from the upper and lower ends of the winding. Needless to say, this happens a lot. Furthermore, although the above embodiment has been described using an on-load voltage regulator as an example, the present invention is not limited to this, and it goes without saying that, for example, a tap-switching transformer or the like may be used.
発明の効果
以上のように本発明によれば、軽量かつ低損失
の変圧器を得ることができる。Effects of the Invention As described above, according to the present invention, a lightweight and low-loss transformer can be obtained.
第1図は従来の負荷時電圧調整器の中身構成図
を示し、aはその構造図、bはその結線図、第2
図は本発明の一実施例に係る負荷時電圧調整器の
中身構成図を示し、aはその構造図、bはその結
線図、第3図は第2図と異なる巻線配置のもれ磁
束の説明図、第4図は第2図の巻線配置のもれ磁
束の説明図である。
1…単相三脚鉄心、2,21,22…励磁巻
線、3,31,32…タツプ巻線、4…タツプリ
ード、6,8…巻線もれ磁束、7…タンク壁、1
1,12…単相二脚鉄心脚、51,52…主磁
束。
Figure 1 shows the internal configuration of a conventional on-load voltage regulator, where a is its structural diagram, b is its wiring diagram, and
The figure shows the internal configuration of a load voltage regulator according to an embodiment of the present invention, in which a is a structural diagram, b is a wiring diagram, and FIG. 3 is a leakage magnetic flux with a winding arrangement different from that in FIG. 2. FIG. 4 is an explanatory diagram of leakage magnetic flux in the winding arrangement of FIG. 2. 1... Single-phase tripod iron core, 2, 21, 22... Excitation winding, 3, 31, 32... Tap winding, 4... Tap lead, 6, 8... Winding leakage magnetic flux, 7... Tank wall, 1
1, 12...Single phase biped iron core leg, 51, 52...Main magnetic flux.
Claims (1)
プ巻線、励磁巻線を順に巻回し、かつ、前記各励
磁巻線同士は並列接続する一方、タツプ巻線同士
は直列接続して全体のタツプ巻線を構成して成る
ことを特徴とする変圧器。 2 特許請求の範囲第1項記載において、前記構
成の変圧器を3個組み合わせて三相としたことを
特徴とする変圧器。[Scope of Claims] 1. A tap winding and an excitation winding are wound in order from the inside on each core leg of a single-phase two-leg iron core, and the excitation windings are connected in parallel, while the tap winding A transformer characterized by connecting two wires in series to form a tap winding. 2. A transformer according to claim 1, characterized in that three transformers having the above configuration are combined to form a three-phase system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56187799A JPS5889817A (en) | 1981-11-25 | 1981-11-25 | Transformer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56187799A JPS5889817A (en) | 1981-11-25 | 1981-11-25 | Transformer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5889817A JPS5889817A (en) | 1983-05-28 |
JPH025281B2 true JPH025281B2 (en) | 1990-02-01 |
Family
ID=16212431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56187799A Granted JPS5889817A (en) | 1981-11-25 | 1981-11-25 | Transformer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5889817A (en) |
-
1981
- 1981-11-25 JP JP56187799A patent/JPS5889817A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5889817A (en) | 1983-05-28 |
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