JPH06222085A - Optical current transformer - Google Patents
Optical current transformerInfo
- Publication number
- JPH06222085A JPH06222085A JP5025957A JP2595793A JPH06222085A JP H06222085 A JPH06222085 A JP H06222085A JP 5025957 A JP5025957 A JP 5025957A JP 2595793 A JP2595793 A JP 2595793A JP H06222085 A JPH06222085 A JP H06222085A
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- pipe
- light
- wave
- collimator
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 22
- 239000004020 conductor Substances 0.000 claims abstract description 26
- 230000000694 effects Effects 0.000 claims abstract description 25
- 239000013307 optical fiber Substances 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000020169 heat generation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ファラデー効果を利用
して導体に流れる電流を測定する周回積分型光変流器に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circular integration type optical current transformer for measuring a current flowing through a conductor by using the Faraday effect.
【０００２】[0002]
【従来の技術】図２に従来の光変流器の構成を示す。2. Description of the Related Art FIG. 2 shows the configuration of a conventional optical current transformer.
【０００３】ＳＦ6 ガスなどの絶縁媒体を充填した密閉
容器内に設置された高圧導体の電流を計測するための光
変流器は、密閉容器を構成する管体１２の内側に位置す
る導体１１を周回するように設置された、高圧側コリメ
ータ１４および受送光部３を有したファラデー効果素子
２と、外部磁界の影響を防止するシールドケース９と、
そのシールドケース９とファラデー効果素子２をつなぐ
支持体１０と、シールドケース９を管体１２に支持する
絶縁塔１５と、管体１２に設置され、密閉容器の外部と
内部との光の授受をおこなう気密コネクタ５と、管体１
２の外部から気密コネクタ５に接続された送光用光ファ
イバ６および受光用光ファイバ７ａ、７ｂと、気密コネ
クタ５に管体１２内部に向かって取り付けられた接地側
コリメータ１３により構成されている。An optical current transformer for measuring the current of a high-voltage conductor installed in a hermetically sealed container filled with an insulating medium such as SF 6 gas is a conductor 11 located inside a tubular body 12 constituting the hermetically sealed container. A Faraday effect element 2 having a high-voltage side collimator 14 and a light receiving / transmitting unit 3, which are installed so as to circulate around, and a shield case 9 for preventing the influence of an external magnetic field,
A support body 10 that connects the shield case 9 and the Faraday effect element 2, an insulating tower 15 that supports the shield case 9 to the tube body 12, and a transmission / reception of light between the outside and the inside of the closed container installed in the tube body 12. Airtight connector 5 and tube body 1
2, the light-transmitting optical fiber 6 and the light-receiving optical fibers 7a and 7b are connected to the airtight connector 5 from the outside, and the ground-side collimator 13 attached to the airtight connector 5 toward the inside of the tube 12. .
【０００４】なお、受送光部３は、検光子および偏光子
から構成される。The light transmitting / receiving section 3 is composed of an analyzer and a polarizer.
【０００５】送光用光ファイバ６により気密コネクタ５
を介して管体１２内部に入射した光は、接地側コリメー
タ１３により平行光線にされ、ファラデー効果素子２の
高圧側コリメータ１４に入射する。このとき光は、接地
側コリメータ１３と高圧側コリメータ１４との間を空間
伝送する。An airtight connector 5 using an optical fiber 6 for transmitting light.
The light that has entered the inside of the tube body 12 via is collimated by the grounding side collimator 13 and enters the high voltage side collimator 14 of the Faraday effect element 2. At this time, the light is spatially transmitted between the ground side collimator 13 and the high voltage side collimator 14.
【０００６】ファラデー効果素子２に到達した光は、高
圧側コリメータ１４で再び平行光線にされ、受送光部３
で一定方向の光が選別されファラデー効果素子２内部に
入り、その形状に従い導体１１を周回し、導体１１の電
流によって生じる磁界により偏光される。The light that has reached the Faraday effect element 2 is collimated again by the high voltage side collimator 14, and the light receiving and transmitting section 3
Light in a certain direction is selected by, enters the inside of the Faraday effect element 2, circulates around the conductor 11 according to its shape, and is polarized by the magnetic field generated by the current of the conductor 11.
【０００７】次に偏光された光は受送光部３でＳ波とＰ
波に分けられ、高圧側コリメータ１４から接地側コリメ
ータ１３に向かって出光する。接地側コリメータ１３に
到達した光は集光され、気密コネクタ５を介してＳ波受
光用光ファイバ７ａ、Ｐ波受光用光ファイバ７ｂにより
管体１２外部に導かれる。Next, the polarized light is transmitted by the light transmitting / receiving section 3 to the S wave and P wave.
The light is divided into waves and emitted from the high voltage side collimator 14 toward the ground side collimator 13. The light that has reached the ground side collimator 13 is condensed and guided to the outside of the tube body 12 through the airtight connector 5 by the S-wave receiving optical fiber 7a and the P-wave receiving optical fiber 7b.
【０００８】導体１１の電流値は、Ｓ波受光用光ファイ
バ７ａおよびＰ波受光用光ファイバ７ｂにより得られる
光強度を光電変換器により電圧信号に変換した後、演算
回路で処理することにより算出される。The current value of the conductor 11 is calculated by converting the light intensity obtained by the S-wave receiving optical fiber 7a and the P-wave receiving optical fiber 7b into a voltage signal by a photoelectric converter and then processing it by an arithmetic circuit. To be done.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら上述した
従来の光変流器は、ファラデー効果素子２を高電圧部に
設置する構造であるため、接地側にある管体１２とファ
ラデー効果素子２との間の絶縁を確保するために空間伝
送部を設ける必要があるが、空間伝送部を持つ光変流器
は、機器への設置時の際、接地側コリメータ１３と高圧
側コリメータ１４との間の光路の調整に繁雑な操作を必
要とする。また、導体１１の発熱により生じるＳＦ6 ガ
スなどの絶縁媒体の揺らぎは、空間伝送中の光を揺らが
せることにより、算出する導体１１の電流値に誤差を生
じさせる。However, since the above-mentioned conventional optical current transformer has a structure in which the Faraday effect element 2 is installed in the high voltage portion, the tube body 12 and the Faraday effect element 2 on the ground side are connected to each other. Although it is necessary to provide a space transmission section in order to ensure insulation between them, the optical current transformer having the space transmission section has a space between the ground side collimator 13 and the high voltage side collimator 14 when it is installed in the device. It requires complicated operations to adjust the optical path. Fluctuations in the insulating medium such as SF 6 gas caused by heat generation of the conductor 11 also cause fluctuations in light during spatial transmission, causing an error in the calculated current value of the conductor 11.
【００１０】そこで本発明は、空間伝送を無くすことに
より、光路の調整を不要にするとともに、導体の発熱に
より生じるＳＦ6 ガスなどの絶縁媒体の揺らぎの影響を
防止することができるようにしたものである。In view of the above, the present invention eliminates the need for adjustment of the optical path by eliminating the spatial transmission, and can prevent the influence of the fluctuation of the insulating medium such as SF 6 gas caused by the heat generation of the conductor. Is.
【００１１】[0011]
【課題を解決するための手段】本発明では、密閉容器内
に設置された、課電される導体と、この導体を周回して
設置されたファラデー効果素子との間に、この導体と同
心的に接地管体を設け、上記ファラデー効果素子と上記
密閉容器の内壁との間の光伝送に光ファイバを用いる。According to the present invention, a conductor to be charged, which is installed in a closed container, and a Faraday effect element that is installed around the conductor, are concentric with the conductor. A ground tube is provided in the optical fiber, and an optical fiber is used for optical transmission between the Faraday effect element and the inner wall of the closed container.
【００１２】[0012]
【作用】上記の構造による本発明の光変流器において
は、課電される導体と同心的に接地管体を設け、該接地
管体を周回するようにファラデー効果素子を設置するた
め、密閉容器を構成する管体とファラデー効果素子の間
を絶縁する必要がない。また、ファラデー効果素子と密
閉容器の内壁との間の光伝送に光ファイバを用いるた
め、設置時における光路の調整が不要である。In the optical current transformer of the present invention having the above-mentioned structure, the grounding tube is provided concentrically with the conductor to be charged, and the Faraday effect element is installed so as to surround the grounding tube. There is no need to insulate between the tubular body forming the container and the Faraday effect element. Further, since the optical fiber is used for the optical transmission between the Faraday effect element and the inner wall of the closed container, it is not necessary to adjust the optical path at the time of installation.
【００１３】[0013]
【実施例】図１は本発明の光変流器の一例を示す。FIG. 1 shows an example of the optical current transformer of the present invention.
【００１４】導体１１と同心的に接地管体１を設け、受
送光部３とコリメータ４を有するファラデー効果素子２
を接地管体１を周回するように設置する。また、コリメ
ータ４と管体１２に設置した気密コネクタ５の間の光伝
送は送光用光ファイバ６、Ｓ波受光用光ファイバ７ａお
よびＰ波受光用光ファイバ７ｂを用いる。A Faraday effect element 2 having a ground tube 1 concentrically with the conductor 11 and having a light receiving / transmitting section 3 and a collimator 4.
Is installed so as to circulate the grounding tube 1. Optical transmission between the collimator 4 and the airtight connector 5 installed in the tube body 12 uses the optical fiber 6 for transmitting light, the optical fiber 7a for receiving S wave, and the optical fiber 7b for receiving P wave.
【００１５】ファラデー効果素子２は支持体１０により
外部磁界の影響を防止するシールドケース９に固定す
る。また、シールドケース９は支持塔８により管体１２
に固定する。The Faraday effect element 2 is fixed to a shield case 9 which prevents the influence of an external magnetic field by a support body 10. In addition, the shield case 9 is supported by the support tower 8 to form a tube body 12
Fixed to.
【００１６】送光用光ファイバ６により気密コネクタ５
を介して管体１２内部に入射した光は、送光用光ファイ
バ６を通りコリメータ４で平行光線にされ、受送光部３
で一定方向の光のみ選別され、ファラデー効果素子２内
部に入り、その形状に従い導体１１を周回し、導体１１
の電流によって生じる磁界により偏光される。An airtight connector 5 is provided by an optical fiber 6 for transmitting light.
The light that has entered the inside of the tube 12 through the collimator 4 passes through the optical fiber 6 for light transmission to be a parallel light beam, and the light receiving and transmitting unit 3
Only the light in a certain direction is selected by, enters the Faraday effect element 2, and circulates around the conductor 11 according to its shape.
Is polarized by the magnetic field produced by the electric current in the.
【００１７】次に偏光された光は受送光部３でＳ波とＰ
波に分けられた後、コリメータ４で集光され、Ｓ波受光
用光ファイバ７ａおよびＰ波受光用光ファイバ７ｂを通
り、気密コネクタ５を介して管体１２外部に導かれる。Next, the polarized light is transmitted by the light transmitting / receiving section 3 to the S wave and P wave.
After being divided into waves, the light is condensed by the collimator 4, passes through the S-wave receiving optical fiber 7a and the P-wave receiving optical fiber 7b, and is guided to the outside of the tube body 12 via the airtight connector 5.
【００１８】導体１１の電流算出方法は従来法と同様で
ある。The method of calculating the current of the conductor 11 is the same as the conventional method.
【００１９】[0019]
【発明の効果】上述した本発明によれば、接地側にファ
ラデー効果素子を設置し、該ファラデー効果素子と密閉
容器を構成する管体の内壁との間の光伝送に光ファイバ
を用いることにより、光路の調整を不要にするととも
に、導体の発熱により生じるＳＦ6 ガスなどの絶縁媒体
の揺らぎの影響を防止することができる。According to the present invention described above, the Faraday effect element is installed on the ground side, and the optical fiber is used for the optical transmission between the Faraday effect element and the inner wall of the tubular body forming the closed container. Therefore, it is possible to eliminate the need for adjusting the optical path and prevent the influence of fluctuations of the insulating medium such as SF 6 gas caused by heat generation of the conductor.
【図１】本発明の光変流器の一例を示す図である。FIG. 1 is a diagram showing an example of an optical current transformer of the present invention.
【図２】従来の光変流器の一例を示す図である。FIG. 2 is a diagram showing an example of a conventional optical current transformer.
１ 接地管体 ２ ファラデー効果素子 ３ 受送光部 ４ コリメータ ５ 気密コネクタ ６ 送光用光ファイバ ７ａ Ｓ波受光用光ファイバ ７ｂ Ｐ波受光用光ファイバ １１ 導体 １２ 管体 1 Grounding Tube 2 Faraday Effect Element 3 Receiving and Transmitting Section 4 Collimator 5 Airtight Connector 6 Optical Fiber for Transmitting 7a Optical Fiber for S Wave Receiving 7b Optical Fiber for P Wave Receiving 11 Conductor 12 Tube
Claims (1)
と、この導体を周回して設置されたファラデー効果素子
との間に、この導体と同心的に接地管体を設け、上記フ
ァラデー効果素子と上記密閉容器の内壁との間の光伝送
に光ファイバを用いた光変流器。1. A grounding tube is provided concentrically with the conductor between a conductor to be charged and a Faraday effect element installed around the conductor, the conductor being installed in a closed container. An optical current transformer using an optical fiber for optical transmission between the Faraday effect element and the inner wall of the closed container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5025957A JPH06222085A (en) | 1993-01-22 | 1993-01-22 | Optical current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5025957A JPH06222085A (en) | 1993-01-22 | 1993-01-22 | Optical current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06222085A true JPH06222085A (en) | 1994-08-12 |
Family
ID=12180234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5025957A Pending JPH06222085A (en) | 1993-01-22 | 1993-01-22 | Optical current transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06222085A (en) |
-
1993
- 1993-01-22 JP JP5025957A patent/JPH06222085A/en active Pending
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