JPS6290545A - Method for measuring current of transmission/ distribution cable - Google Patents
Method for measuring current of transmission/ distribution cableInfo
- Publication number
- JPS6290545A JPS6290545A JP60047260A JP4726085A JPS6290545A JP S6290545 A JPS6290545 A JP S6290545A JP 60047260 A JP60047260 A JP 60047260A JP 4726085 A JP4726085 A JP 4726085A JP S6290545 A JPS6290545 A JP S6290545A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- optical fiber
- distribution cable
- power transmission
- cable
- 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
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は例えば地中送配電用ケーブルの電流を光ファイ
バ磁界センサを用いて計測する方法に関するものである
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of measuring, for example, current in an underground power transmission and distribution cable using an optical fiber magnetic field sensor.
（従来技術及び解決すべき問題点）
地中送配電用ケーブルの高圧倒（配電線は６．６ＫＶ１
２２ＫＶが主）の区間電流や通過電流、幹線電流あるい
は地中電気機器の電流の計測を行なうことは、送配電線
の管理、運用面において非常に作動であるが、これを行
なうためにはケーブル等へ計器用ＣＴを取付ける必要が
ある。(Prior art and problems to be solved) Underground power transmission and distribution cables are overpowered (distribution lines are 6.6KV1
Measuring the section current (mainly 22KV), passing current, mains current, or current of underground electrical equipment is very useful in the management and operation of power transmission and distribution lines. It is necessary to attach an instrument CT to the equipment.
しかし計器用ＣＴを用いて電気的に計測する限り、誘導
は皆無にはできず信号伝送部（リード線）で７ｒ１磁誘
導、静電誘導の影響やサージの侵入のおそれがあった。However, as long as measurement is carried out electrically using an instrument CT, induction cannot be completely eliminated, and there is a risk of 7r1 magnetic induction, electrostatic induction, or surge intrusion in the signal transmission section (lead wire).
又計器用ＣＴは通常外径が５０■ｌφ以上あり、取付け
には７０璽−×７０箇曹×５０１璽φ以上のスペースが
必要であるがこのようなスペースがなかったり、計器用
ＣＴは巻線ををするためにケーブルクランプの機能を持
たせられる程の機械的強度を持たせるのが困難である等
の問題があった。Also, instrument CTs usually have an outer diameter of 50 lφ or more, and a space of 70 mm x 70 mm x 501 mm or more is required for installation. There were problems such as it was difficult to provide enough mechanical strength to function as a cable clamp for holding cables.
（問題点を解決するための手段）
本発明は上述の問題点を解消した新規な送配電ケーブル
の電流計測方法を提供するもので、その特徴は送配電ケ
ーブルの外周上に光ファイバ磁界センサを具えた磁性体
を配置し、送配電ケーブルの生ずる磁界を上記磁性体で
集束し、これを光ファイバ磁界センサで検出することに
ある。(Means for Solving the Problems) The present invention provides a novel current measurement method for power transmission and distribution cables that solves the above-mentioned problems. The purpose of the present invention is to arrange a magnetic body with a magnetic body, to focus the magnetic field generated by the power transmission/distribution cable with the magnetic body, and to detect this with an optical fiber magnetic field sensor.
（実施例）
第１図は本発明の方法を実施のためケーブルのクランプ
部において、送配電ケーブルの外周上に光ファイバ磁界
センサを具えた磁性体を配置した状態の横断面図である
。(Example) FIG. 1 is a cross-sectional view of a state in which a magnetic body provided with an optical fiber magnetic field sensor is arranged on the outer periphery of a power transmission/distribution cable in a cable clamp portion for carrying out the method of the present invention.
図面において、（１）は送配電用ケーブルで、その外周
上にはゴムスペーサ■を介して光ファイバ磁界センサ（
Φを挾み込んだドーナツ杖の半割磁性体（３）を配置し
ている。上記磁性体■の外周上には上下金具（７）■よ
り成るクランプ金具０が位置し、上下金具■（８）のフ
ランジ部（７ａ） （８ａ）をボルトで締付けることに
より内部のケーブル（１）及び磁性体（３）を固定して
いる。なおりランプ金具（６）の下部金具■には機器や
壁面等への取付けのための固定台（９）が一体に設けら
れている。In the drawing, (1) is a power transmission and distribution cable, and an optical fiber magnetic field sensor (
A half-split magnetic body (3) of a donut cane with Φ sandwiched in between is arranged. Clamp fitting 0 consisting of upper and lower fittings (7) ■ is located on the outer periphery of the magnetic body ■, and by tightening the flanges (7a) and (8a) of the upper and lower fittings ■ (8) with bolts, the internal cable (1 ) and the magnetic body (3) are fixed. A fixing base (9) for attachment to equipment, a wall surface, etc. is integrally provided to the lower metal fitting (2) of the naori lamp fitting (6).
０１１記光ファイバ磁界センサ（４）はファラデー素子
を仔しており、磁界センサ（Φの周囲は導？ｆ１層■で
覆われ、この導電層■は接地用端子ＯＧによって接地さ
れて静電シールドされている。The optical fiber magnetic field sensor (4) has a Faraday element, and the magnetic field sensor (Φ) is surrounded by a conductive layer (2), and this conductive layer (3) is grounded by a grounding terminal OG and acts as an electrostatic shield. has been done.
上記ファラデー素子としてはＢＳＯ（Ｂ ｉ＋２Ｓ １
ｏ２ｏ）、ＢＧＯ（Ｂｉ１２ Ｇｅ０２ｏ） 、Ｚｎ５
ｅ １鉛ガラス、ＹＩＧ系磁性ガーネット、等が使用さ
れ、磁性体（３）としては純鉄、炭素鋼、合金鋼、けい
素鋼、等の鋼材、あるいは、パーマロイ、センダスト合
金、モリブデンパーマロイ等の圧粉心、フェライト、焼
結軟磁性材料等が使用される。The above Faraday element is BSO (B i + 2S 1
o2o), BGO (Bi12 Ge02o), Zn5
e1 Lead glass, YIG magnetic garnet, etc. are used, and the magnetic material (3) is steel such as pure iron, carbon steel, alloy steel, silicon steel, or permalloy, sendust alloy, molybdenum permalloy, etc. Powder cores, ferrite, sintered soft magnetic materials, etc. are used.
上述のように送配電ケーブル（１）のクランプ部におい
て、光ファイバ磁界センサに）を具えた磁性体（３）を
配置することにより、送配電ケーブル（１）の電流によ
る磁界は磁性体（３）で集束され、これを光ファイバ磁
界センサ（２）で検出する。光ファイバ磁界センサ（４
で検出された信号は第２図に示すように光ファイバケー
ブルＱｌ） ニ、ｉ、すＥｌｏ 、 Ｏ／Ｅ変ｔｉ ｉ
ｏ２１に送られて電気信号に変換され計測器に送られ
て？′ｌＸ流として読みとることができる。As described above, by arranging the magnetic body (3) equipped with an optical fiber magnetic field sensor) in the clamp part of the power transmission and distribution cable (1), the magnetic field caused by the current of the power transmission and distribution cable (1) is suppressed by the magnetic body (3). ), and this is detected by the optical fiber magnetic field sensor (2). Optical fiber magnetic field sensor (4
The signal detected by the optical fiber cable Ql) d, i, Elo, O/E change ti i as shown in Figure 2
It is sent to o21, converted into an electrical signal, and sent to a measuring device? It can be read as 'lX style.
（発明の効果）
−に述した本発明の送配電ケーブルの電流計測方法によ
れば次のような利点を有するものである。(Effects of the Invention) The current measuring method for power transmission and distribution cables of the present invention described in - has the following advantages.
■ケーブルのクランプ部等においてケーブルの外周上に
光ファイバ磁界センサを具えた磁性体を配置できるので
、従来のような計器用ＣＴを取付けるためのスペースを
必要としない。(2) Since a magnetic body equipped with an optical fiber magnetic field sensor can be placed on the outer periphery of the cable at the cable clamp portion, etc., there is no need for space for installing a conventional instrument CT.
■検出部が磁性体でシールドされているので電磁誘導を
受は難く、他相電流による磁界の影響がない。■Since the detection part is shielded with a magnetic material, it is difficult to receive electromagnetic induction and is not affected by magnetic fields caused by other phase currents.
■光ファイバ磁界センサは周囲の導電層により静電／−
ルドされているので、静電誘導を受は難い。■Optical fiber magnetic field sensors generate static electricity/- due to the surrounding conductive layer.
Since it is shielded, it is difficult to receive electrostatic induction.
■光ファイバ磁界センサを使用するため、信号伝電磁誘
導や静電誘導を受けることがなく、又検出部よりサージ
が侵入し計測器まで伝搬することがない。■Since an optical fiber magnetic field sensor is used, signal transmission is not affected by electromagnetic induction or electrostatic induction, and surges do not enter from the detection section and propagate to the measuring instrument.
■送配電ケーブル上に単に磁界センサを配置しただけで
は、ケーブル周囲の磁界が弱いため電流検出感度が低く
、電流値が小さいときにはＴ１１度が悪いが、本発明の
方法では、ケーブルの周囲に磁性体を配置し磁界を集束
するので感度が高（０，２Ａから計測できる。このこと
は磁性体のない場合の５〜ＩＯ倍の感度である。■Simply placing magnetic field sensors on power transmission and distribution cables would result in low current detection sensitivity due to the weak magnetic field around the cable, and poor T11 degree when the current value is small.However, with the method of the present invention, the magnetic field around the cable is Since the magnetic field is focused by arranging the magnetic body, the sensitivity is high (measurable from 0.2 A. This is 5 to IO times more sensitive than when there is no magnetic material.
第１図は本発明の計測方法の実施のためケーブルのクラ
ンプ部において、送配電ケーブルの外周上に光ファイバ
磁界センサを具えた磁性体を配置した状態の横断面図、
第２図は計測方法の線図的説明図である。
１・・・送配電用ケーブル、３・・・磁性体、４・・・
光ファイバ磁界センサ、６・・・クランプ金具。FIG. 1 is a cross-sectional view of a state in which a magnetic body equipped with an optical fiber magnetic field sensor is arranged on the outer periphery of a power transmission and distribution cable at a cable clamp portion for carrying out the measurement method of the present invention;
FIG. 2 is a diagrammatic illustration of the measurement method. 1... Power transmission and distribution cable, 3... Magnetic material, 4...
Optical fiber magnetic field sensor, 6...clamp fitting.
Claims (3)
サを具えた磁性体を配置し、送配電ケーブルの生ずる磁
界を上記磁性体で集束し、これを光ファイバ磁界センサ
で検出することを特徴とする送配電ケーブルの電流計測
方法。(1) A magnetic body equipped with an optical fiber magnetic field sensor is arranged on the outer circumference of the power transmission and distribution cable, and the magnetic field generated by the power transmission and distribution cable is focused by the magnetic body, and this is detected by the optical fiber magnetic field sensor. A method for measuring current in power transmission and distribution cables.
いることを特徴とする特許請求の範囲第１項記載の送配
電用ケーブルの電流計測方法。(2) The method for measuring current in a power transmission/distribution cable according to claim 1, wherein the optical fiber magnetic field sensor includes a Faraday element.
れ静電シールドされていることを特徴とする特許請求の
範囲第１項記載の送配電用ケーブルの電流計測方法。(3) The method for measuring current in a power transmission and distribution cable according to claim 1, wherein the optical fiber magnetic field sensor is surrounded by a conductive layer and electrostatically shielded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60047260A JPS6290545A (en) | 1985-03-08 | 1985-03-08 | Method for measuring current of transmission/ distribution cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60047260A JPS6290545A (en) | 1985-03-08 | 1985-03-08 | Method for measuring current of transmission/ distribution cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6290545A true JPS6290545A (en) | 1987-04-25 |
Family
ID=12770313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60047260A Pending JPS6290545A (en) | 1985-03-08 | 1985-03-08 | Method for measuring current of transmission/ distribution cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6290545A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01162668U (en) * | 1988-04-28 | 1989-11-13 | ||
| JPH04106477A (en) * | 1990-08-27 | 1992-04-08 | Ngk Insulators Ltd | Electroscope |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5897669A (en) * | 1981-12-07 | 1983-06-10 | Sumitomo Electric Ind Ltd | Magnetic field-light converter |
| JPS58124960A (en) * | 1982-01-21 | 1983-07-25 | Mitsubishi Electric Corp | Current measuring device |
| JPS59191100A (en) * | 1983-04-15 | 1984-10-30 | 株式会社日立製作所 | Biased self-correlation analysis system |
| JPS59198360A (en) * | 1983-04-27 | 1984-11-10 | Kansai Electric Power Co Inc:The | Optical current transformer apparatus |
| JPS6033060A (en) * | 1983-08-02 | 1985-02-20 | Hitachi Ltd | Photocurrent probe |
-
1985
- 1985-03-08 JP JP60047260A patent/JPS6290545A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5897669A (en) * | 1981-12-07 | 1983-06-10 | Sumitomo Electric Ind Ltd | Magnetic field-light converter |
| JPS58124960A (en) * | 1982-01-21 | 1983-07-25 | Mitsubishi Electric Corp | Current measuring device |
| JPS59191100A (en) * | 1983-04-15 | 1984-10-30 | 株式会社日立製作所 | Biased self-correlation analysis system |
| JPS59198360A (en) * | 1983-04-27 | 1984-11-10 | Kansai Electric Power Co Inc:The | Optical current transformer apparatus |
| JPS6033060A (en) * | 1983-08-02 | 1985-02-20 | Hitachi Ltd | Photocurrent probe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01162668U (en) * | 1988-04-28 | 1989-11-13 | ||
| JPH04106477A (en) * | 1990-08-27 | 1992-04-08 | Ngk Insulators Ltd | Electroscope |
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