JPS6117149B2 - - Google Patents
Info
- Publication number
- JPS6117149B2 JPS6117149B2 JP53008935A JP893578A JPS6117149B2 JP S6117149 B2 JPS6117149 B2 JP S6117149B2 JP 53008935 A JP53008935 A JP 53008935A JP 893578 A JP893578 A JP 893578A JP S6117149 B2 JPS6117149 B2 JP S6117149B2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- insulating tube
- potential
- height direction
- pressure air
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000011109 contamination Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 239000012212 insulator Substances 0.000 description 5
- 230000007257 malfunction Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Landscapes
- Rectifiers (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Thyristors (AREA)
Description
【発明の詳細な説明】
本発明は高圧風令式サイリスタバルブに関する
もので、特に光信号伝達制御部の絶縁構成の改良
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-pressure air thyristor valve, and particularly to an improvement in the insulation structure of an optical signal transmission control section.
従来の高圧風令式サイリスタバルブは第１図に
示すように、単体のサイリスター素子１を多数直
列にして、それに電圧分担調整用のCR2を並列に
接続して直列素子の電圧分担を均等にしている。
このようなユニツト構成３−１から３−５を、更
に多段積にして高圧を発生させている。この場合
の各段素子のゲート制御には一般にオプテイカル
フアイバーケーブルと称してガラスの繊維を束ね
その表面をポリエチレン等で被覆した光信号を伝
達する絶縁ケーブル４（以下単にケーブルと略
す）が用いられる。このケーブル４は接地電位側
に設けられた光信号制御装置５に接続されて各段
のサイリスター素子１を制御する。したがつて高
さ方向に対する絶縁強度が必要である。例えば
125kv級では、そのケーブル４の長さは５〜６ｍ
にも達し、その数も100本をこえる。このように
長く、しかも本数が多くなると整理上何本かを一
緒に束ねられて各段から出ているケーブルサポー
ト６に支持されて吊下げられる。従来のケーブル
支持方法の問題点は、風令式であるためケーブル
４は直接気中に露出されており、ケーブル４の表
面に汚損物の付着や湿潤などの影響をうけやすく
なり表面絶縁抵抗が著るしく低下することがあ
る。この場合ケーブル４の高さ方向の電圧分担は
その表面抵抗で決定されるため、ユニツト構成３
の内部に設けられている電圧分担調整用のCR２
が接続されていても、ケーブル４自身の高さ方向
の電圧分担を改善することはできない。特に束ね
られたケーブル本数の異なる上下段で不均等にな
る。即ちケーブル本数の少ない上段側に過剰のス
トレスがかかつて局部的な部分放電を発生するこ
とがある。このような部分放電の発生は、単にケ
ーブル４の絶縁劣化としての悪影響だけでなくケ
ーブル４内の微弱な光信号にも干渉してゲート制
御に誤動作を与える致命的な原因となる。 As shown in Figure 1, the conventional high-pressure air-operated thyristor valve has a large number of single thyristor elements 1 connected in series, and CR2 for voltage sharing adjustment connected in parallel to equalize the voltage sharing among the series elements. There is.
Such unit configurations 3-1 to 3-5 are further stacked in multiple stages to generate high pressure. In this case, for gate control of each stage element, an insulated cable 4 (hereinafter simply referred to as cable) that transmits optical signals is generally used, which is called an optical fiber cable and is made by bundling glass fibers and coating the surface with polyethylene or the like. . This cable 4 is connected to an optical signal control device 5 provided on the ground potential side to control the thyristor elements 1 at each stage. Therefore, insulation strength in the height direction is required. for example
For 125kv class, the length of cable 4 is 5 to 6m.
The number has reached over 100. When the cables are long and there are a large number of cables, several cables are bundled together and suspended while being supported by cable supports 6 protruding from each tier. The problem with the conventional cable support method is that the cable 4 is directly exposed to the air because it is a wind system, and the surface of the cable 4 is easily affected by contaminants and moisture, resulting in a decrease in surface insulation resistance. It may decrease significantly. In this case, since the voltage distribution in the height direction of the cable 4 is determined by its surface resistance, the unit configuration 3
CR2 for voltage sharing adjustment installed inside
Even if the cable 4 is connected, the voltage distribution in the height direction of the cable 4 itself cannot be improved. In particular, the number of bundled cables becomes uneven between the upper and lower tiers, which differ in number. That is, excessive stress may be applied to the upper stage side where the number of cables is small, causing local partial discharge. The occurrence of such a partial discharge not only has an adverse effect as a result of deterioration of the insulation of the cable 4, but also interferes with a weak optical signal within the cable 4, resulting in a fatal cause of malfunction in gate control.
以上はケーブルの表面抵抗が低下することによ
つて起る問題であるが、逆に低温度の乾燥時に
は、ケーブルの表面抵抗率が高過ぎるために前述
と同様の問題を起すことがある。例えば、電圧極
性を急に反転したとき、また逆極性のサージ電圧
が印加されたときなどは、ケーブルの表面に残留
電荷が残るため局部的に部分放電を起し誤動作の
原因となる。 The above problems are caused by a decrease in the surface resistance of the cable, but conversely, when drying at a low temperature, the surface resistivity of the cable is too high, which may cause the same problems as mentioned above. For example, when the voltage polarity is suddenly reversed or when a surge voltage of the opposite polarity is applied, residual charges remain on the surface of the cable, causing local partial discharge and causing malfunction.
本発明は、ケーブルが汚損湿潤をうけないよう
に絶縁筒の内部に収納し、支持したもので、ケー
ブルの表面抵抗が若干変化しても高さ方向の電位
分担が安定するように絶縁筒の内部に、またケー
ブル自身に高抵抗を施して高さ方向の電位を固定
するとともに残留電荷も除去し、安定した光信号
を伝達制御する高圧風冷式サイリスタバルブを提
供することを目的とする。 In the present invention, the cable is housed and supported inside an insulating tube to prevent it from getting dirty or wet.The insulating tube is designed to stabilize the potential distribution in the height direction even if the cable's surface resistance changes slightly. The purpose of the present invention is to provide a high-pressure air-cooled thyristor valve that fixes the potential in the height direction by applying high resistance internally and to the cable itself, and also removes residual charges, thereby controlling the transmission of stable optical signals.
本発明を図面にもとづいて説明すると第２図に
示すように従来の絶縁サポート６に替つて、絶縁
筒７を設けて、この内部にケーブル４を収納して
いる。絶縁筒７を拡大したものを第３図に示す。
絶縁筒７の内面には高抵抗体８を施したものであ
る。この高抵抗体の一実施例としては、絶縁筒７
に磁器を用い、その内部の表面には通常磁器がい
しの釉薬に変えて、導電性の金属酸化物を加えた
導電釉を施せばその表面抵抗は105〜10Ωcm／cmの
抵抗値が得られ、ケーブルの表面抵抗108〜15Ω
cm／cmより低い一種の抵抗体がいしとなり、この
内面にケーブル４を接触させることによりケーブ
ル４の高さ方向の電位を固定させることができ
る。しかもケーブル４の表面の残留電荷はこの表
面抵抗で放電されるため極性反転の苛酷な条件に
そうぐうしても局部的なストレスを緩和し、部分
放電の発生を防止することができる。またケーブ
ル４自身の表面に半導塗料として、油成ワニスを
主成分とし、これにシリコーン、カーバイドを添
加し混合したもので、その混合割合によつて表面
抵抗率の好ましい値が得られる。この塗料を収納
される全ケーブルに塗布すれば、絶縁筒内部のケ
ーブル４の全数が抵抗体８に接触させなくても良
く、絶縁筒内部の支持が容易になる。 The present invention will be explained based on the drawings. As shown in FIG. 2, an insulating tube 7 is provided in place of the conventional insulating support 6, and the cable 4 is housed inside the insulating tube 7. An enlarged view of the insulating tube 7 is shown in FIG.
A high resistance element 8 is applied to the inner surface of the insulating cylinder 7. As an example of this high resistance body, the insulating cylinder 7
If porcelain is used for the insulator, and a conductive glaze containing a conductive metal oxide is applied to the internal surface of the insulator instead of the glaze normally used for porcelain insulators, a surface resistance value of 10 5 to 10 Ωcm/cm can be obtained. cable surface resistance 10 8~15 Ω
A type of resistor with a resistance lower than cm/cm acts as an insulator, and by bringing the cable 4 into contact with the inner surface of this insulator, the potential in the height direction of the cable 4 can be fixed. Moreover, since the residual charge on the surface of the cable 4 is discharged by this surface resistance, even if the cable 4 is subjected to severe conditions of polarity reversal, local stress can be alleviated and the occurrence of partial discharge can be prevented. Further, a semiconducting paint on the surface of the cable 4 itself is made by mixing an oil varnish as a main component with the addition of silicone and carbide, and depending on the mixing ratio, a preferable value of surface resistivity can be obtained. If this paint is applied to all the cables housed, it is not necessary for all the cables 4 inside the insulating tube to come into contact with the resistor 8, and the support inside the insulating tube becomes easier.
本発明の特性を示すと、第４図のようになりイ
は従来方法の特性図で、ロは本発明の特性図で、
高さ方向に対し均等な電位分担となり安定した光
信号伝達制御が可能である。 The characteristics of the present invention are shown in Figure 4, where A is a characteristic diagram of the conventional method, B is a characteristic diagram of the present invention,
The potential is shared evenly in the height direction, allowing stable optical signal transmission control.
第１図は従来の高圧風冷サイリスタバルブの絶
縁構成図、第２図は本発明の高圧風冷サイリスタ
バルブの絶縁構成図、第３図は絶縁筒の拡大横断
面図、第４図は本発明と従来との特性比較図であ
る。
１……サイリスタ素子、２……CR、３……ユ
ニツト、４……ケーブル、５……光信号制御装
置、６……サポート、７……絶縁筒、８……高抵
抗体。
Fig. 1 is an insulation configuration diagram of a conventional high-pressure air-cooled thyristor valve, Fig. 2 is an insulation configuration diagram of a high-pressure air-cooled thyristor valve of the present invention, Fig. 3 is an enlarged cross-sectional view of an insulating cylinder, and Fig. 4 is an insulating configuration diagram of a conventional high-pressure air-cooled thyristor valve. It is a characteristic comparison diagram of the invention and the conventional one. DESCRIPTION OF SYMBOLS 1... Thyristor element, 2... CR, 3... Unit, 4... Cable, 5... Optical signal control device, 6... Support, 7... Insulating tube, 8... High resistance body.
Claims (1)
気中の汚損湿潤から避け、かつその絶縁筒の内面
に高抵抗体を施してそれにケーブルを接触させ、
ケーブルの表面電位を絶縁筒の抵抗体の電位に固
定し高さ方向の電位を均等化した高圧風冷式サイ
リスタバルブ。1. The cable for optical signal control is housed in an insulating tube to avoid contamination and moisture in the air, and the inner surface of the insulating tube is coated with a high resistance material and the cable is brought into contact with it.
A high-pressure air-cooled thyristor valve that fixes the surface potential of the cable to the potential of the resistor in the insulating tube and equalizes the potential in the height direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP893578A JPS54102989A (en) | 1978-01-31 | 1978-01-31 | Thyristor valve of high-voltage air blast cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP893578A JPS54102989A (en) | 1978-01-31 | 1978-01-31 | Thyristor valve of high-voltage air blast cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54102989A JPS54102989A (en) | 1979-08-13 |
| JPS6117149B2 true JPS6117149B2 (en) | 1986-05-06 |
Family
ID=11706515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP893578A Granted JPS54102989A (en) | 1978-01-31 | 1978-01-31 | Thyristor valve of high-voltage air blast cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54102989A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62156142U (en) * | 1986-03-26 | 1987-10-03 |
-
1978
- 1978-01-31 JP JP893578A patent/JPS54102989A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62156142U (en) * | 1986-03-26 | 1987-10-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54102989A (en) | 1979-08-13 |
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