JPS6156405A - Autotransformer - Google Patents

Abstract

PURPOSE:To obtain a practically excellent equipment in the case that a required tap width is wider reducing the change of iron core magnetic flux density by providing a three winding series transformer which has the thrid winding connected to the series winding of an autotransformer. CONSTITUTION:A voltage regulation transformer 10 consisting of a tap winding 12 and a magnetizing winding 11 is connected to the neutral point side of a main autotransformer consisting of a series winding 1, a shunt winding 2 and a tertiary winding 3. The third winding 23 of a series transformer 20 is connected in series to the series winding 1 of the autotransformer. This adds the voltage proportional to regulation voltage to the high voltage of the autotransformer and the primary regulation voltage can be made wider to the extent against the output voltage of the tap winding 12 of the voltage regulation transformer. Consequently, the voltage of the tap winding 12 can be made lower against the same required high voltage regulation width. For example, the voltage of the tap winding can be reduced to 1/2 and the variation of the magnetic flux of an iron core to 40%.

Description

【発明の詳細な説明】 〔発明の技術分野〕 この発明は、単巻変圧器装置に関するものであり、とり
わけ、中性点側に電圧調整変圧器を設置した単巻変圧器
装置に関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an autotransformer device, and particularly to an autotransformer device in which a voltage regulating transformer is installed on the neutral point side. .

〔従来の技術〕[Conventional technology]

従来、この種の装置として、第１図に示す構成のものが
広く採用されていた。すなわち、−相分を示す第１図に
おいて、直列巻線／１分路巻線コ。Conventionally, as this type of device, one having the configuration shown in FIG. 1 has been widely adopted. That is, in FIG. 1 showing the negative phase component, the series winding/1 shunt winding.

三次巻線３でなる主単巻変圧器の中性点側に、タップ巻
線／、２と励磁巻線ｌ／でなる電圧調整変圧器ＩＯを接
続してなるものである。しかし、かかる構成になるもの
は、三次電圧が従属的に変化するため、三次端子に他の
電気装置を接続した場合に支障を生ずること、タップ間
隔が等間隔にならない等の欠点があった。A voltage regulating transformer IO consisting of a tap winding /2 and an excitation winding l/ is connected to the neutral point side of a main autotransformer consisting of a tertiary winding 3. However, with such a configuration, the tertiary voltage changes dependently, which causes problems when other electrical devices are connected to the tertiary terminal, and the taps are not equally spaced.

以上の点を改良するため、すでに第二図に示す三次巻線
Ｊに直列変圧器コＯを挿入した構成になるものが提案さ
れた（特公昭ｓｂ−，ｔ／ｌＪｔ、）。In order to improve the above points, a structure has already been proposed in which a series transformer O is inserted into the tertiary winding J shown in FIG.

＝７は第１巻線、−一は第２巻線である。しかし。=7 is the first winding, and -1 is the second winding. but.

この構成のものも単巻変圧器の巻数公比（Ｃｏ−ｒａｔ
ｉｏ）が小さく、かつ、所要タップ幅が広い場合には単
巻変圧器の鉄心磁束密度のタップによる変化が大きくな
りすぎること、タップ巻線／−２の誘起電圧が窩くなり
すぎ、通常のタップ切換器が使用できなくなる等、上記
の改良では解決し得ない欠点が顕著となってくる。例え
ば、ｇ／表の左欄は、第２図の構成のものを３φ２００
±Ｊ’ＯｋＶ／Ｊ　弘ｊｋＶ／６６ｋＶの単巻変圧器装
置に適用した場合を示すが、これにより明らかなように
、タップ巻線全電圧が士／／１３ｋＶと実調整電圧士！
ＯｋＶのコ倍以上となり、！圧能力的に使用できるタッ
プ切換器が存在せず、また。This configuration also has the common winding ratio (Co-rat) of an autotransformer.
io) is small and the required tap width is wide, the change in the core magnetic flux density of the autotransformer due to the tap becomes too large, the induced voltage in the tap winding /-2 becomes too large, and the normal Disadvantages that cannot be solved by the above improvements, such as the tap changer becoming unusable, become noticeable. For example, the left column of the g/table shows the configuration shown in Figure 2 as 3φ200.
The case where it is applied to a ±J'OkV/J kV/66kV auto-transformer device is shown, and as is clear from this, the total tap winding voltage is +//13kV, which is the actual regulated voltage!
It is more than twice as large as OkV! There is no tap changer that can be used in terms of pressure capacity.

鉄心磁束変化量も９！ｒ％と極めて大きくなるため。The amount of change in iron core magnetic flux is also 9! Because it becomes extremely large as r%.

最高タップ以外での鉄心磁束密度を極端に低下させねば
ならず、鉄心が大幅に大形化するなど、所望の電圧仕様
の単巻変圧器を製作することが困難であった。It was difficult to manufacture an autotransformer with desired voltage specifications because the iron core magnetic flux density at areas other than the highest tap had to be extremely reduced, and the iron core had to be significantly larger.

、　　　　　〔発明の概要〕 この発明は１以上のような従来のものの欠点を解決しよ
うとするもので、直列変圧器のｇ１巻線には常に調整電
圧に比例した電圧が誘起されていることに着目し、直列
変圧器に設げた第３の巻線を単巻変圧器に接続したこと
により、直列巻線電圧に、調整電圧に比的した電圧が加
味されるようにしてなる単巻変圧器装置を提供する。, [Summary of the Invention] This invention attempts to solve one or more of the drawbacks of the conventional ones, and focuses on the fact that a voltage proportional to the regulated voltage is always induced in the g1 winding of a series transformer. An autotransformer device in which a third winding provided in the series transformer is connected to the autotransformer, so that a voltage proportional to the regulated voltage is added to the series winding voltage. I will provide a.

〔発明の実施例〕[Embodiments of the invention]

第３図の一実施例は、直列変圧器−２０に第一の巻線２
Ｊを設け、この第３巻線コＪを単巻変圧器の直列巻線ｌ
と直列に接続してなるものである。One embodiment of FIG. 3 shows a first winding 2 in series transformer-20.
J is provided, and this third winding J is connected to the series winding l of an autotransformer.
It is connected in series with.

矢印Ｉ／・・・・・・工ｓｓは該当部位における電流方
向を示すＯ 以上の構成により、単巻変圧器の高圧側電圧には調整電
圧に比例した電圧が加算されることになり、その分だけ
同じ調整変圧器タップ巻線／２の出力電圧に対して一次
側の調整電圧を広くすることができる。The arrow I/...... ss indicates the current direction in the relevant part O With the above configuration, a voltage proportional to the regulated voltage is added to the high voltage side voltage of the autotransformer, and the The regulating voltage on the primary side can be made wider by the same amount as the output voltage of the same regulating transformer tap winding/2.

このことは、換言すれば、同じ所要高圧側調整幅に対し
、タップ巻線ｌコの電圧を低くすること　　ｌができる
ことを意味し、第２図に示した従来のものの欠点を著し
く緩和することが可能となる。この−例を第１表右欄に
示したが、同一電圧仕様の単Ｓｖ圧器においても１本発
明によれば、従来のものにくらべてタップ巻線電圧は／
／２以下に、また鉄心磁束変化量もダＯ％に低減でき、
実用的に丁ぐれた単巻変圧器を提供することができる。In other words, this means that the voltage of the tap winding can be lowered for the same required high-voltage side adjustment width, which significantly alleviates the drawbacks of the conventional one shown in Figure 2. becomes possible. An example of this is shown in the right column of Table 1. Even in a single Sv voltage transformer with the same voltage specifications, according to the present invention, the tap winding voltage is lower than that of the conventional one.
/2 or less, and the change in core magnetic flux can be reduced to 0%.
A practically neat autotransformer can be provided.

また、舅／表下欄には、装置容量を３φｔｏｏｏ／１０
００／ＪＯＯＭＶｋ　　とした場合に各巻線電流および
各巻線実容量を従来装置（特公昭ｒ　ｂ　−ａ／７３ｂ
）とこの実施例を比奴して示したが、この発明による場
合は巻線総容量が従来のものの９０％程度となっており
、仮にタップ切換器の電圧的能力が解決されたとしても
、本発明による方が経衝的な変圧器装置を提供できるこ
とを示している。In addition, the device capacity is 3φtoo/10 in the bottom column of the table.
00/JOOMVk, each winding current and each winding actual capacity are compared to the conventional device
) and this embodiment was shown in comparison, but in the case of this invention, the total winding capacity is about 90% of that of the conventional one, and even if the voltage capacity of the tap changer could be solved, This shows that the present invention can provide a more economical transformer device.

なお、上記は高圧側電圧調整の場合について説明したが
、低圧側電圧調整の場合は、第９図に示すように直列変
圧器第３巻線コＪを低圧端子と直列巻線−分路巻線の接
続点の間に挿入することに、　　より同様の効果を得る
ことができる。The above description has been made for the case of high-voltage side voltage adjustment, but in the case of low-voltage side voltage adjustment, as shown in Figure 9, the third winding of the series transformer is connected to the low-voltage terminal and the series winding - shunt winding. A similar effect can be achieved by inserting it between the connection points of the lines.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明は、中性点側に電圧調整
変圧器を設置した琳巻変圧器装置において、三次電圧を
タップにかかわらず一定に保ち。As explained above, the present invention maintains the tertiary voltage constant regardless of the tap in a Rinwaki transformer device in which a voltage regulating transformer is installed on the neutral point side.

かつ、タップ幅を一定化すると共にタップ切換器電圧負
担、鉄心磁束密度１化を軽減し、所要タップ幅が広い場
合にも実用的にすぐれた装置を提供することができる。In addition, it is possible to make the tap width constant, reduce the voltage burden on the tap changer and reduce the iron core magnetic flux density from becoming 1, and provide a practically excellent device even when the required tap width is wide.

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

第１図および第２図はそれぞれ従来装置の要部概略結線
図、第３図および第参図はそれぞれこの発明の実施例の
要部概略結線図である。 ／・・直列巻線１．２・・分路巻線、３・・三次巻線、
１０・・電圧調整変圧器、／／・・電圧調整変圧器の励
磁＠、線、／２・・電圧ＦＡ整整圧圧器タップ巻線、二
〇・・直列変圧器、２１・・直列変圧器の第１巻線、２
コ・＠直列変圧器の第二巻線、コ３・・直列変圧器の第
３巻線。 なお、各図中、同一符号は同−又は相当部分を示す。 １１′FIGS. 1 and 2 are schematic wiring diagrams of main parts of a conventional device, and FIGS. 3 and 3 are schematic wiring diagrams of main parts of an embodiment of the present invention, respectively. /...Series winding 1.2...Shunt winding, 3...Tertiary winding,
10...Voltage regulation transformer, //...Voltage regulation transformer excitation@, line, /2...Voltage FA regulator tap winding, 20...Series transformer, 21...Series transformer's 1st winding, 2
Co.@Second winding of series transformer, Co.3...Third winding of series transformer. In each figure, the same reference numerals indicate the same or corresponding parts. 11'

Claims (3)

【特許請求の範囲】[Claims] （１）中性点側にタップ巻線が分路巻線と直列に接続さ
れ、三次巻線により励磁される電圧調整変圧器を有する
単巻変圧器装置において、 前記タップ巻線の電圧により励磁される第１巻線と、前
記三次巻線の一端と三次端子間に直列に接続された第２
巻線と、単巻変圧器の直列巻線と低圧端子間に接続され
た第３巻線とからなる３巻線直列変圧器を備えてなるこ
とを特徴とする単巻変圧器装置。(1) In an autotransformer device having a voltage regulating transformer in which a tap winding is connected in series with a shunt winding on the neutral point side and is excited by a tertiary winding, the tap winding is excited by the voltage of the tap winding. and a second winding connected in series between one end of the tertiary winding and the tertiary terminal.
An autotransformer device comprising a three-winding series transformer comprising a winding and a third winding connected between the series winding of the autotransformer and a low voltage terminal. （２）第３巻線が、単巻変圧器の直列巻線と分路巻線間
に直列に接続された特許請求の範囲第１項記載の単巻変
圧器装置。(2) The autotransformer device according to claim 1, wherein the third winding is connected in series between the series winding and the shunt winding of the autotransformer. （３）第３巻線が、単巻変圧器の直列巻線と分路巻線の
接続点と低圧端子間に接続された特許請求の範囲第１項
記載の単巻変圧器装置。(3) The autotransformer device according to claim 1, wherein the third winding is connected between the connection point between the series winding and the shunt winding of the autotransformer and the low voltage terminal.