JPS6323560A - Thyristor valve - Google Patents
Thyristor valveInfo
- Publication number
- JPS6323560A JPS6323560A JP16370286A JP16370286A JPS6323560A JP S6323560 A JPS6323560 A JP S6323560A JP 16370286 A JP16370286 A JP 16370286A JP 16370286 A JP16370286 A JP 16370286A JP S6323560 A JPS6323560 A JP S6323560A
- Authority
- JP
- Japan
- Prior art keywords
- thyristor
- thyristors
- thyristor valve
- voltage
- series
- 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.)
- Granted
Links
- 230000003252 repetitive effect Effects 0.000 claims abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Power Conversion In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、例えば無効電力補償装置等に使用される。サ
イリスタを互いに逆並列に接続し、この逆並列接続した
ユニットを１台又は所定数直列接続して成るサイリスタ
バルブに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention is used, for example, in a reactive power compensator. The present invention relates to a thyristor valve in which thyristors are connected in antiparallel to each other, and one unit or a predetermined number of units connected in antiparallel are connected in series.
（従来の技術）
電力系統の電圧安定化のため、サイリスタにより無効電
流を制御する、いわゆるサイリスタ式無効電力補償装置
が知られている。そのシステム構成については、種々提
案されているが、最も基本的なものは第３図に示すサイ
リスタ制御リアクトル方式（以下ＴＣＲと記す）がある
。(Prior Art) A so-called thyristor-type reactive power compensator, which controls reactive current using a thyristor, is known in order to stabilize the voltage of a power system. Various system configurations have been proposed, but the most basic one is the thyristor-controlled reactor system (hereinafter referred to as TCR) shown in FIG.
母線１−にコンデンサ２と制御用リアクトル３とサイリ
スタバルブ４の直列接続したユニットを接続し、母線１
の電圧を電圧変成器５で検出して制御回路６に導く。制
御回路６はゲート制御信号７の位相を制御して、無効電
流を制御し、母線電圧を所定の電圧変動におさめる。サ
イリスタバルブの具体的な構成例を第４図を参照して説
明する。A series-connected unit of capacitor 2, control reactor 3, and thyristor valve 4 is connected to bus 1-, and
The voltage is detected by the voltage transformer 5 and guided to the control circuit 6. The control circuit 6 controls the phase of the gate control signal 7 to control the reactive current and keep the bus voltage within a predetermined voltage fluctuation. A specific example of the configuration of the thyristor valve will be explained with reference to FIG. 4.
サイリスタ８は２個が互いに逆並列に接続されているこ
れらのサイリスタと並列に電圧分担を均等化するため分
圧回路９及び１０が接続され、１つのサイリスタバルブ
を構成する。サイリスタバルブを所定数直列接続したサ
イリスタバルブの端子間にはサージアレスタ１１を設は
サイリスタバルブを過電圧から保護している。サージア
レスタ１１の保護レベル■ρｒとサイリスタ８の耐圧に
より必要となるサイリスタバルブの直列数Ｎ１はω式に
より決定される。なお一般にサイリスタの耐圧は逆方向
耐圧（Ｖｒｓｍ）よりも順方向耐圧（Ｖｄｒｍ）の方が
低いため、Ｎ１はＶｄｒｍで決定される。Two thyristors 8 are connected in antiparallel to each other, and voltage dividing circuits 9 and 10 are connected in parallel to these thyristors to equalize voltage sharing, thereby forming one thyristor valve. A surge arrester 11 is provided between the terminals of a thyristor valve in which a predetermined number of thyristor valves are connected in series to protect the thyristor valve from overvoltage. The number N1 of series-connected thyristor valves required is determined by the protection level ρr of the surge arrester 11 and the withstand pressure of the thyristor 8 using the ω formula. Note that in general, the forward breakdown voltage (Vdrm) of a thyristor is lower than the reverse breakdown voltage (Vrsm), so N1 is determined by Vdrm.
Ｎ １ ＝ＶｐｒＸ Ｋ Ｉ Ｘ Ｋ ２ ／ Ｖｄｒ
ｍ−■ここでに１：Ｖｐｒに対する裕度
に２：サイリスタバルブ間の電圧アンバランスＶｐｒ：
サージアレスタ保護レベル
一方、準方向電圧がスレッシュホールドレベルを越えた
時、自己消弧して自からを保護する機能を有するサイリ
スタ（以下ＶＢＯフリーサイリスタと記す）が開発され
ている。N 1 = VprX K I X K 2 / Vdr
m-■Here 1: Tolerance to Vpr 2: Voltage unbalance between thyristor valves Vpr:
Surge arrester protection level On the other hand, a thyristor (hereinafter referred to as a VBO-free thyristor) has been developed which has the function of self-extinguishing and protecting itself when the forward voltage exceeds a threshold level.
（発明が解決しようとする問題点）
又、一般にサイリスタバルブの電力損失、価格、外形は
サイリスタの直列接続数に比例する。(Problems to be Solved by the Invention) Generally, the power loss, price, and external shape of a thyristor valve are proportional to the number of thyristors connected in series.
本発明は、サイリスタバルブにＶＢＯフリーサイリスタ
を適切に採用することにより、サイリスタ直列数を減少
出来、もって運転中の電力損失が少なく低価格で小形の
サイリスタバルブを得ることを目的とする。An object of the present invention is to appropriately employ a VBO-free thyristor in a thyristor valve so that the number of thyristors connected in series can be reduced, thereby obtaining a small-sized thyristor valve with low power loss during operation and at low cost.
（問題点を解決するための手段と作用）本発明は、ＶＢ
Ｏフリーサイリスタのスレッシュホールドレベル（以下
ＶＢＯ電圧と記す）をそのサイリスタの非繰返し逆耐電
圧（Ｖｒｓｍ）に等しいか、あるいはごくわずか（１〜
１０％）低く設定してサイリスタバルブを構成する。か
かるサイリスタバルブでは、通常の運転電圧でサイリス
タが自己点弧しない条件でサイリスタの直列数を決定す
る。(Means and effects for solving the problems) The present invention is based on VB
The threshold level (hereinafter referred to as VBO voltage) of an O-free thyristor is equal to the non-repetitive reverse withstand voltage (Vrsm) of the thyristor, or is very small (1 to
10%) to configure a thyristor valve. In such a thyristor valve, the number of thyristors connected in series is determined under the condition that the thyristor does not self-ignite at normal operating voltage.
かくして、サイリスタバルブに過電圧が印加されるとサ
イリスタは自己点弧するため従来のようにサイリスタバ
ルブの端子間にサージアレスタを設ける必要はない。Thus, since the thyristor self-ignites when an overvoltage is applied to the thyristor valve, there is no need to provide a surge arrester between the terminals of the thyristor valve as in the conventional case.
（実施例）
本発明を適用したサイリスタバルブの１例を第１図に示
す。第３図に示した従来のサイリスタバルブと異なるの
は、ＶＢＯフリーサイリスタ１２を使用していること、
更にサージアレスタを省略している点である。本構成に
おいて、ＶＢＯフリーサイリスタ１２のＶＢＯ電圧と逆
耐電圧（Ｖｒｓｍ ）をひとしく設定する。(Example) An example of a thyristor valve to which the present invention is applied is shown in FIG. The difference from the conventional thyristor valve shown in FIG. 3 is that a VBO free thyristor 12 is used.
Furthermore, a surge arrester is omitted. In this configuration, the VBO voltage and reverse withstand voltage (Vrsm) of the VBO free thyristor 12 are set to be the same.
ＶＢＯ電圧をＶｒｓｍとひとしく設定した場合の必要な
サイリスタバルブの直列数Ｎ２は０式で求められる。When the VBO voltage is set equal to Vrsm, the necessary number N2 of thyristor valves connected in series can be found using equation 0.
Ｎ ２ ＝ＶｏｐＸ Ｋ ２ Ｘ Ｋ ３ ／ Ｖｒｓ
ｍ −■ただしＶＯＰ：運転電圧最大値
に２：サイリスタバルブ間のアンバランスに３：安全係
数
１ばこで、Ｎ１とＮ２を比較するため両者の比をとって
みる。N2=VopXK2XK3/Vrs
m -■ However, VOP: Maximum operating voltage 2: Unbalance between thyristor valves 3: Safety factor 1 To compare N1 and N2, take the ratio of the two.
Ｎ ２／Ｎ １ ＝Ｖｄｒｍ／ＶＲ８Ｍ ＸＶｏｐ／Ｖ
ｐｒＸＫ３／Ｋ １−■右辺の第１項は一般に１／１．
１〜１／１．１５である。N2/N1=Vdrm/VR8M XVop/V
prXK3/K 1-■ The first term on the right side is generally 1/1.
It is 1 to 1/1.15.
右辺の第２項は一般に酸化亜鉛ギヤプレス形で１／１．
４程度である。、Ｋｌ、に３は一般にそれぞれ１、］、
５．１．０５〜１．１に選定する。以上の条件より■式
より、Ｎ２／Ｎｌは
Ｎ ２ ／Ｎ １ ＝０．５７〜０．６２となる
このことは、本発明によりサイリスタの直列数を従来の
５７％〜６０％程度に減少できることを示している。The second term on the right side is generally 1/1 for zinc oxide gear press type.
It is about 4. , Kl, and 3 are generally each 1, ],
5. Select from 1.05 to 1.1. Based on the above conditions, N2/Nl is N 2 /N 1 = 0.57 to 0.62 from equation (2).This means that the present invention can reduce the number of thyristors in series to about 57% to 60% of the conventional number. It shows.
ＶＢＯ電圧がＶｒｓｍよりわずかでも大きくなると、成
るサイリスタがＶＢＯターンオンした時。When the VBO voltage becomes even slightly larger than Vrsm, the thyristor turns on VBO.
そのサイリスタに逆並列接続されているサイリスタはＶ
ｒｓｍを越える逆電圧が印加されるのでサイリスタは破
損してしまう。従って、経時変化等を考慮して第４図の
ようにＶｒｓｍに対してＶＢ○電圧を係数に４だけ小さ
く選定して、実施することも出来る。図に示すように、
この場合も運転電圧最大値Ｖｏｐよりに３だけ太きくＶ
ＢＯ電圧を選定する。この場合のサイリスタ直列数Ｎ３
は次式％式％
（イ）式より明らかなように、この場合のサイリスタ直
列数は、ＶＢＯ電圧をＶ ｒｓｍと等しくした場合に比
べて、Ｎ４倍だけ多くなる。従ってに４を出来るだけ小
さくすると本発明の効果は大きくなる。The thyristor connected in antiparallel to that thyristor is V
Since a reverse voltage exceeding rsm is applied, the thyristor is damaged. Therefore, in consideration of changes over time, etc., it is also possible to select the VB○ voltage as a coefficient smaller than Vrsm by 4 as shown in FIG. 4. As shown in the figure,
In this case as well, V is 3 thicker than the maximum operating voltage Vop.
Select BO voltage. In this case, the number of thyristors connected in series N3
As is clear from equation (a), the number of thyristors connected in series in this case is N4 times greater than when the VBO voltage is equal to Vrsm. Therefore, if 4 is made as small as possible, the effect of the present invention will be increased.
以上説明したように、本発明によればサイリスタ直列数
を少なく、従って電力損失が小さく、安価で、小形のサ
イリスタバルブを提供することが出来る。As explained above, according to the present invention, it is possible to reduce the number of thyristors connected in series, thereby providing a small-sized, inexpensive thyristor valve with low power loss.
第１図は本発明の一実施例を示す回路図、第２図は本発
明を説明するための各種電圧レベルの関係を示す図、第
３図は本発明が適用されるサイリスタバルブを使用して
いる従来の静止形無動電力補償装置の単線結線図、第４
図は第３図の静止形無動電力補償装置で使用しているサ
イリスタバルブの回路図である。
１・・・母線、 ２・・・コンデンサ、
３・・・制御用リアクｌ−ル、 ４・・・サイリスタバ
ルブ、５・・・電圧変圧器、 ６・・・制御回路
、７・・・グー１〜制御信号、 ８・・・ザイリス
タ。
９．１０・・・分圧回路、 １１・・・サー
ジアレスタ。
１２・・・ＶＢＯフリーサイリスタ。
第１図
第２図
第３図
第４図Fig. 1 is a circuit diagram showing one embodiment of the present invention, Fig. 2 is a diagram showing the relationship between various voltage levels to explain the invention, and Fig. 3 is a circuit diagram showing an example of the present invention using a thyristor valve. Single-line diagram of a conventional static static power compensator, Part 4
This figure is a circuit diagram of a thyristor valve used in the static type passive power compensator shown in FIG. 3. 1... Bus bar, 2... Capacitor,
3... Control reactor, 4... Thyristor valve, 5... Voltage transformer, 6... Control circuit, 7... Goo 1~control signal, 8... Zyristor. 9.10...Voltage divider circuit, 11...Surge arrester. 12...VBO free thyristor. Figure 1 Figure 2 Figure 3 Figure 4
Claims (1)
己点弧して自からを保護する機能を有するサイリスタを
、互いに逆並列に接続し、この逆並列接続したユニット
を１台又は所定数直列接続して成るサイリスタバルブに
おいて、前記サイリスタのスレッシュホールドレベルを
非繰返し頭逆耐圧に等しいか、僅かに低く選定し、前記
サイリスタバルブの端子間に設けられるサージアレスタ
を省略したことを特徴とするサイリスタバルブ。When the forward voltage exceeds a threshold level, thyristors that have the function of self-ignition to protect themselves are connected in anti-parallel to each other, and one or a predetermined number of units connected in anti-parallel are connected in series. A thyristor valve comprising a thyristor valve, characterized in that the threshold level of the thyristor is selected to be equal to or slightly lower than the non-repetitive head reverse withstand voltage, and a surge arrester provided between terminals of the thyristor valve is omitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61163702A JP2670261B2 (en) | 1986-07-14 | 1986-07-14 | Thyristor valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61163702A JP2670261B2 (en) | 1986-07-14 | 1986-07-14 | Thyristor valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6323560A true JPS6323560A (en) | 1988-01-30 |
| JP2670261B2 JP2670261B2 (en) | 1997-10-29 |
Family
ID=15778993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61163702A Expired - Fee Related JP2670261B2 (en) | 1986-07-14 | 1986-07-14 | Thyristor valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2670261B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01209950A (en) * | 1988-02-15 | 1989-08-23 | Toshiba Corp | Power conversion device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56162971A (en) * | 1980-05-15 | 1981-12-15 | Fuji Electric Co Ltd | Emergency ignition detecting circuit for thyristors connected in series |
| JPS60183815A (en) * | 1984-03-02 | 1985-09-19 | Toshiba Corp | Overvoltage protecting device of thyristor valve |
-
1986
- 1986-07-14 JP JP61163702A patent/JP2670261B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56162971A (en) * | 1980-05-15 | 1981-12-15 | Fuji Electric Co Ltd | Emergency ignition detecting circuit for thyristors connected in series |
| JPS60183815A (en) * | 1984-03-02 | 1985-09-19 | Toshiba Corp | Overvoltage protecting device of thyristor valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01209950A (en) * | 1988-02-15 | 1989-08-23 | Toshiba Corp | Power conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2670261B2 (en) | 1997-10-29 |
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