JP2598861B2 - Detection method of dissolved gas in oil - Google Patents
Detection method of dissolved gas in oilInfo
- Publication number
- JP2598861B2 JP2598861B2 JP29586492A JP29586492A JP2598861B2 JP 2598861 B2 JP2598861 B2 JP 2598861B2 JP 29586492 A JP29586492 A JP 29586492A JP 29586492 A JP29586492 A JP 29586492A JP 2598861 B2 JP2598861 B2 JP 2598861B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- gas
- insulating oil
- cable
- dissolved
- 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 - Fee Related
Links
Landscapes
- Testing Relating To Insulation (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は絶縁油の劣化測定方法
に関し、特にＯＦケーブルのジョイントボックス（以
下、ＪＢともいう）内に充填された絶縁油中に溶存する
ガスを検出するための方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring deterioration of insulating oil, and more particularly to a method for detecting gas dissolved in insulating oil filled in a joint box (hereinafter, also referred to as JB) of an OF cable. Things.
【０００２】[0002]
【従来の技術】図２に示されているように、ＯＦケーブ
ル１のケーブル導体接続部３には導体露出部を囲繞する
ようにして油密構造のＪＢ２が装着され、そのＪＢ２内
に絶縁油６が充填されている。ＪＢ２の上下に設けられ
た油注入孔５ａ（上口）、５ｂ（下口）の一方の注入孔
５ａにはガスセンサ１２が取り付けられており、このガ
スセンサ１２の検出信号が信号ケーブル９を通して分析
装置へ送られてＪＢ２内の絶縁油中に溶存しているガス
が検出される。2. Description of the Related Art As shown in FIG. 2, an oil-tight structure JB2 is attached to a cable conductor connecting portion 3 of an OF cable 1 so as to surround a conductor exposed portion, and an insulating oil is provided in the JB2. 6 are filled. A gas sensor 12 is attached to one of the oil injection holes 5 a (upper opening) and 5 b (lower opening) provided above and below the JB 2, and a detection signal of the gas sensor 12 is transmitted through the signal cable 9 to the analyzer. And the gas dissolved in the insulating oil in JB2 is detected.
【０００３】この種のガス検出に用いられるセンサとし
ては、２本の光ファイバの先端を光軸を一致させて絶縁
油やその分離ガス中にて向かい合わせ、一方の光ファイ
バには光源を、他方の光ファイバには波長分析装置を接
続し、光源からの特定吸収波長帯の光を絶縁油などに通
過させ、その吸収量から油中溶存ガスを検出するように
したものがある。（特開昭55-87028号等）As a sensor used for this type of gas detection, the ends of two optical fibers are made to face each other in an insulating oil or its separated gas with their optical axes aligned, and one optical fiber is provided with a light source. Some of the other optical fibers are connected to a wavelength analyzer to allow light in a specific absorption wavelength band from a light source to pass through insulating oil or the like, and to detect dissolved gas in oil from the amount of absorption. (JP-A-55-87028, etc.)
【０００４】[0004]
【発明が解決しようとする課題】ところで、ＯＦケーブ
ル１のＪＢ２内はケーブル導体接続部３によって中央部
がほぼ仕切られ左右の油室に分かれた形になっている。
そのため、ケーブル長手方向の絶縁油の移動は極く少な
く、ＪＢ２内のセンサ設置部から離れた箇所で可燃性ガ
スなどが発生し、その付近の絶縁油にガスが溶存したと
しても、これがセンサ１２まで到達するのには相当時間
がかかる。従って、放電が生じＪＢ２が危険な状態にあ
ってもセンサ１２で検知されない場合があり、非常に危
険である。By the way, the inside of the JB 2 of the OF cable 1 is substantially divided at the center by a cable conductor connecting portion 3 and is divided into left and right oil chambers.
Therefore, the movement of the insulating oil in the longitudinal direction of the cable is extremely small, and even if flammable gas or the like is generated at a location away from the sensor installation portion in the JB2, and even if the gas is dissolved in the insulating oil in the vicinity, this is the same as the sensor 12. It takes a considerable amount of time to reach. Therefore, even if JB2 is in a dangerous state due to discharge, it may not be detected by the sensor 12, which is very dangerous.
【０００５】この発明の目的は、前記した従来技術の欠
点を解消し、絶縁油中に発生したガスを短時間のうちに
センサ部に到達させて絶縁油劣化の早期診断を行うこと
ができる油中溶存ガスの検出方法を提供することにあ
る。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to make it possible for gas generated in insulating oil to reach a sensor section within a short period of time, thereby enabling early diagnosis of deterioration of insulating oil. It is an object of the present invention to provide a method for detecting dissolved gas.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
この発明は、ＯＦケーブルの導体接続部を囲繞するジョ
イントボックスにセンサを取り付けてボックス内の絶縁
油中に溶存しているガスを検出するようにした油中溶存
ガスの検出方法において、磁性流体を封入した螺旋形状
のチューブを上記導体接続部の周囲を取り巻くようにし
て且つ遊びを持たせて設け、ケーブル導体に流れる交流
電流の誘導磁界を利用して上記チューブを振動させるこ
とにより上記ジョイントボックス内の絶縁油を撹拌する
ようにしたことを特徴としている。According to the present invention, a sensor is attached to a joint box surrounding a conductor connection portion of an OF cable to detect gas dissolved in insulating oil in the box. In the method for detecting dissolved gas in oil as described above, a spiral tube enclosing a magnetic fluid is provided so as to surround the periphery of the conductor connection portion with a play, and an induction magnetic field of an alternating current flowing through the cable conductor is provided. By vibrating the tube by utilizing the above, the insulating oil in the joint box is agitated.
【０００７】[0007]
【作用】ＯＦケーブルの周囲には、そのケーブル導体に
流れる交流電流による強力な誘導磁界（交流磁界）が常
時発生している。したがって、上記のように磁性流体の
入ったチューブを導体接続部の周囲に設けておけば、そ
のチューブは誘導磁界の影響で自然に振動することにな
る。チューブの振動によってジョイントボックス内の絶
縁油が強制的に撹拌されるので、絶縁油中に発生したガ
スは，短時間のうちにセンサ部に到達することになり、
絶縁油の劣化を早期に検出できる。A strong induction magnetic field (AC magnetic field) is constantly generated around an OF cable by an AC current flowing through the cable conductor. Therefore, if the tube containing the magnetic fluid is provided around the conductor connection portion as described above, the tube will naturally vibrate under the influence of the induced magnetic field. Since the insulating oil in the joint box is forcibly stirred by the vibration of the tube, the gas generated in the insulating oil will reach the sensor in a short time,
Deterioration of insulating oil can be detected early.
【０００８】[0008]
【実施例】以下、この発明の一実施例を図１に基いて説
明する。An embodiment of the present invention will be described below with reference to FIG.
【０００９】ＯＦケーブル１のケーブル導体接続部３に
は導体露出部を囲繞するようにして油密構造のＪＢ２が
装着され、そのＪＢ２内に絶縁油８が充填されている。
ＪＢ２の上下には油注入孔５ａ（上口）、５ｂ（下口）
が既設されており、一方の注入孔５ａにはガスセンサ１
２が取り付けられている。ガスセンサ１２は、フィルタ
１１、ガス検出部１０等から構成されており、ガス検出
部１０の出力は信号ケーブル９を介して分析装置（図示
せず）に接続されている。An oil-tight JB 2 is mounted on the cable conductor connection portion 3 of the OF cable 1 so as to surround the exposed conductor portion, and the JB 2 is filled with an insulating oil 8.
Oil injection holes 5a (upper), 5b (lower) above and below JB2
Is provided, and the gas sensor 1 is provided in one injection hole 5a.
2 are installed. The gas sensor 12 includes a filter 11, a gas detector 10, and the like. The output of the gas detector 10 is connected to an analyzer (not shown) via the signal cable 9.
【００１０】ＪＢ２内には、磁性流体６を封入してなる
チューブ７が導体接続部３の周囲を取り巻くようにし
て、且つＪＢ２と導体接続部３の両方に対して遊びを持
たせるようにして導体接続部３の長手方向に螺旋状に布
設されている。In the JB 2, a tube 7 enclosing a magnetic fluid 6 is formed so as to surround the periphery of the conductor connection portion 3, and both the JB 2 and the conductor connection portion 3 have play. The conductor connection portion 3 is laid in a spiral shape in the longitudinal direction.
【００１１】このチューブ７は、ケーブル導体を流れる
交流電流の誘導磁界の影響でその全体が微少振動を起こ
す。この微少振動によって絶縁油８が撹拌され、放電な
どによって生じたガスは絶縁油８中に溶解しやすくな
る。また、チューブ７を導体接続部３の周囲に螺旋状に
巻いてあるので、従来自然拡散と導体の熱による上下方
向の対流によってのみ移動していた絶縁油８中の溶存ガ
スは、チューブ７の螺旋形状に沿って進むようになり、
ＪＢ２の長手方向にも良好に移動できるようになる。す
なわち、絶縁油８中の溶存ガスは、ＪＢ２内全域に亘り
均一に拡散することになる。[0011] The tube 7 entirely generates minute vibrations under the influence of an induced magnetic field of an alternating current flowing through the cable conductor. The insulating oil 8 is stirred by the minute vibration, and the gas generated by the discharge or the like is easily dissolved in the insulating oil 8. In addition, since the tube 7 is spirally wound around the conductor connection portion 3, the dissolved gas in the insulating oil 8 which has been moved only by the natural diffusion and the vertical convection due to the heat of the conductor in the related art is reduced to It starts to follow the spiral shape,
It is also possible to move well in the longitudinal direction of JB2. That is, the dissolved gas in the insulating oil 8 is diffused uniformly throughout the entire area of the JB 2.
【００１２】したがって、ガスセンサ１２から離れた箇
所において放電などによりガスが生じた場合でも、その
ガスはチューブ７の撹拌作用で速やかに絶縁油８中に溶
解し、絶縁油８中に均一に拡散してガスセンサ１２内に
短時間で到達することになる。ガスセンサ１２内に入っ
た油中溶存ガスはガスセンサ１２内のフィルタ１１によ
って分離され、ガス検出部１０に送り込まれて検出され
る。このガスセンサ１２の検出信号は信号ケーブル９を
通って分析装置へ送られる。Therefore, even when gas is generated due to electric discharge or the like at a location distant from the gas sensor 12, the gas is rapidly dissolved in the insulating oil 8 by the stirring action of the tube 7, and diffuses uniformly into the insulating oil 8. Therefore, the gas reaches the gas sensor 12 in a short time. The dissolved gas in oil that has entered the gas sensor 12 is separated by the filter 11 in the gas sensor 12 and sent to the gas detection unit 10 to be detected. The detection signal of the gas sensor 12 is sent to the analyzer through the signal cable 9.
【００１３】なお、上記チューブ７の材質は特に限定さ
れず、耐油性のものであればよい。磁性流体６をチュー
ブ７内の媒体としているので、チューブ７の曲げ加工性
は良い。The material of the tube 7 is not particularly limited and may be any oil-resistant material. Since the magnetic fluid 6 is used as the medium in the tube 7, the tube 7 has good bending workability.
【００１４】[0014]
【発明の効果】以上要するにこの発明によれば、ケーブ
ル導体に流れる交流電流の誘導磁界を利用して磁性流体
入りのチューブを振動させることによりジョイントボッ
クス内の絶縁油を強制的に撹拌するようにしたので、放
電などによって発生したガスが速やかに絶縁油中に溶解
してジョイントボックス内に均一に拡散し、センサ部に
短時間で到達するようになり、絶縁油の劣化を早期に検
出することができる。In summary, according to the present invention, the insulating oil in the joint box is forcibly stirred by vibrating the tube containing the magnetic fluid by using the induced magnetic field of the alternating current flowing through the cable conductor. As a result, the gas generated by electric discharge etc. quickly dissolves in the insulating oil and diffuses uniformly in the joint box, and reaches the sensor in a short time, so that the deterioration of the insulating oil can be detected early. Can be.
【図１】この発明の一実施例を示すＯＦケーブル接続部
の縦断面図である。FIG. 1 is a longitudinal sectional view of an OF cable connecting portion showing one embodiment of the present invention.
【図２】従来例を示すＯＦケーブル接続部の縦断面図で
ある。FIG. 2 is a longitudinal sectional view of an OF cable connection portion showing a conventional example.
１ ＯＦケーブル ２ ジョイントボックス（ＪＢ） ３ 導体接続部 ６ 磁性流体 ７ チューブ ８ 絶縁油 １２ ガスセンサ（センサ） DESCRIPTION OF SYMBOLS 1 OF cable 2 Joint box (JB) 3 Conductor connection part 6 Magnetic fluid 7 Tube 8 Insulating oil 12 Gas sensor (sensor)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 晃之 茨城県日立市日高町５丁目１番１号 日 立電線株式会社オプトロシステム研究所 内 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Akiyuki Nakamura 5-1-1 Hidakacho, Hitachi City, Ibaraki Pref.
Claims (1)
ョイントボックスにセンサを取り付けてボックス内の絶
縁油中に溶存しているガスを検出するようにした油中溶
存ガスの検出方法において、磁性流体を封入した螺旋形
状のチューブを上記導体接続部の周囲を取り巻くように
して且つ遊びを持たせて設け、ケーブル導体に流れる交
流電流の誘導磁界を利用して上記チューブを振動させる
ことにより上記ジョイントボックス内の絶縁油を撹拌す
るようにしたことを特徴とする油中溶存ガスの検出方
法。1. A method for detecting a gas dissolved in oil, wherein a sensor is attached to a joint box surrounding a conductor connection portion of an OF cable to detect a gas dissolved in insulating oil in the box. A spiral tube enclosing the joint box is provided so as to surround the periphery of the conductor connection portion with play, and vibrates the tube using an induced magnetic field of an alternating current flowing through the cable conductor, thereby forming the joint box. A method for detecting dissolved gas in oil, wherein the insulating oil in the oil is stirred.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29586492A JP2598861B2 (en) | 1992-11-05 | 1992-11-05 | Detection method of dissolved gas in oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29586492A JP2598861B2 (en) | 1992-11-05 | 1992-11-05 | Detection method of dissolved gas in oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06148173A JPH06148173A (en) | 1994-05-27 |
| JP2598861B2 true JP2598861B2 (en) | 1997-04-09 |
Family
ID=17826178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29586492A Expired - Fee Related JP2598861B2 (en) | 1992-11-05 | 1992-11-05 | Detection method of dissolved gas in oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2598861B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9117952B2 (en) * | 2011-02-10 | 2015-08-25 | Lg Chem, Ltd. | Front sheet of solar cell, method of manufacturing the same and photovoltaic module comprising the same |
| JP5755161B2 (en) * | 2012-02-18 | 2015-07-29 | 株式会社ビスキャス | OF cable line degradation diagnosis method and OF cable line equipment suitable for it |
| CN107091656B (en) * | 2017-04-24 | 2019-06-28 | 北京交通大学 | A kind of magnetic liquid seal for underwater detectoscope detecting element |
| CN109991225A (en) * | 2017-12-30 | 2019-07-09 | 光力科技股份有限公司 | Transformer dissolved gas analysis device |
| CN108579135A (en) * | 2018-04-28 | 2018-09-28 | 国家电网公司 | A kind of portability insulating oil degassing device of constant temperature |
| CN108680838A (en) * | 2018-05-21 | 2018-10-19 | 国网天津市电力公司电力科学研究院 | A kind of transformer insulated deterioration mode discrimination method |
-
1992
- 1992-11-05 JP JP29586492A patent/JP2598861B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06148173A (en) | 1994-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4949583A (en) | Method of mass flow measurement by the coriolis principle and mass flow meter operating by the coriolis principle | |
| US4843233A (en) | Device for detecting vibrations including a multimode optical fiber as sensitive element | |
| JP2598861B2 (en) | Detection method of dissolved gas in oil | |
| EP0953830A3 (en) | Apparatus for and method to detect vibrations using optical interference in an optical fiber loop | |
| US5258898A (en) | Electric lighting support assembly | |
| US4378497A (en) | Optical fiber magnetic field sensor with thermal and acoustic isolation | |
| US4648082A (en) | Marine acoustic gradient sensor | |
| SU618061A3 (en) | Wire rope-to-chain connecting device containing sleeve with taper axial hole for securing wire rope end | |
| WO1996012189A3 (en) | METHODS OF SCREENING FOR ULCERATIVE COLITIS AND CROHN'S DISEASE BY DETECTING VH3-15 AUTOANTIBODY AND pANCA | |
| BR9913894A (en) | Horn speaker system | |
| KR980003498A (en) | Elongated Flexible Spaced Specific Gravity Fiber Optic Interference Hearing Aid | |
| DE60230675D1 (en) | OUTSIDE LIMIT SECURITY SYSTEM AND OUTER LIMIT MONITORING PROCEDURES | |
| KR970052760A (en) | Endpoint Detection Device in Plasma Etching Equipment | |
| KR930002844A (en) | Fiber Coupler Manufacturing Equipment | |
| KR830009477A (en) | Fiber optic rotation sensor | |
| NO891335L (en) | DEVICE FOR AA BOARD UNDERWATING OF LIVELY CABLE OR PIPE PIPE AT LARGE DEPTH. | |
| GB2111209B (en) | Piezoelectric oscillatory gyroscopes | |
| FR2611333B1 (en) | DEVICE FOR TRANSMITTING AN ELECTRICAL SIGNAL THROUGH A WALL OF A FARADAY CAGE | |
| GB1463910A (en) | Liquid level sensor | |
| JPS6186630A (en) | Method for detecting water intrusion in communication cable using optical fiber | |
| JP5187674B2 (en) | Sensor head for gas detection | |
| SU905764A1 (en) | Method of checking pipe-line condition in the process of operation | |
| JP2826011B2 (en) | Coriolis flow meter | |
| SU1214212A1 (en) | Apparatus for electric separation of loose mixture | |
| JPH04160350A (en) | Optical fiber type liquid detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |