JPH0566989B2 - - Google Patents
Info
- Publication number
- JPH0566989B2 JPH0566989B2 JP60296630A JP29663085A JPH0566989B2 JP H0566989 B2 JPH0566989 B2 JP H0566989B2 JP 60296630 A JP60296630 A JP 60296630A JP 29663085 A JP29663085 A JP 29663085A JP H0566989 B2 JPH0566989 B2 JP H0566989B2
- Authority
- JP
- Japan
- Prior art keywords
- deterioration
- terminal
- cable
- insulator
- insulation
- 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 - Lifetime
Links
- 230000006866 deterioration Effects 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 claims description 18
- 239000012212 insulator Substances 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 11
- 239000011888 foil Substances 0.000 claims description 9
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、電極ケーブルの終端接続部の劣化
検出方法、更に詳しくは終端接続部がコンデンサ
分圧形の構造を有する超高圧電力ケーブルの終端
部における劣化を検出する方法に関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for detecting deterioration of a terminal connection part of an electrode cable, and more specifically, to a method for detecting deterioration of a terminal connection part of an electrode cable, and more specifically, a method for detecting deterioration of a terminal connection part of an electrode cable. The present invention relates to a method for detecting deterioration in a part.
［従来の技術］
電極ケーブルの絶縁劣化の状況を検出する手段
は、いくつかあつた終端部、それもコンデンサ分
圧形の構造を有する終端部の絶縁劣化を検出する
手段は、今迄提供されていない。[Prior Art] Until now, there have been several means for detecting insulation deterioration of an electrode cable at its terminal end, particularly at a terminal end having a capacitor voltage division type structure. Not yet.
従つて、従来は終端部が絶縁破壊を起こし、そ
れを解体してみて始めてそれが劣化していたこと
を知るというのが現状であつた。 Therefore, in the past, the current situation was that dielectric breakdown occurred at the terminal end, and it was only after dismantling it that it was discovered that it had deteriorated.
［発明が解決しようとする問題点］
そこで、本発明では終端接続部がコンデンサ分
圧形の構造を有する電力ケーブルの終端部におい
ては、同終端部が劣化するとコンデンサに流れる
電流に異常を来すことに着目し、これを利用して
電力ケーブルの終端接続部の劣化を検出する方法
を提供するにある。[Problems to be Solved by the Invention] Therefore, in the present invention, in the terminal part of a power cable whose terminal connection part has a structure of capacitor voltage division type, if the terminal part deteriorates, the current flowing through the capacitor will become abnormal. The object of the present invention is to provide a method for detecting deterioration of a terminal connection portion of a power cable by utilizing this fact.
［問題点を解決するための手段および作用］
本発明の劣化検出方法は、コンデンサ分圧形構
造を有する終端部が絶縁劣化するとコンデンサに
流れる電流に、劣化による特有なパルス性電流成
分が重畳されるので、この劣化信号成分を絶縁劣
化測定器等により検出できるようにしたものであ
る。[Means and effects for solving the problem] The deterioration detection method of the present invention detects that when the insulation of the terminal end having a capacitor voltage division type structure deteriorates, a unique pulsed current component due to the deterioration is superimposed on the current flowing through the capacitor. Therefore, this deterioration signal component can be detected by an insulation deterioration measuring device or the like.
［実施例］
以下、本発明の劣化検出方法を図示の一実施例
によつて説明する。第１図は本発明の適用された
終端接続部の内部構造を示したものであつて、ケ
ーブル高圧側導体１には絶縁紙からなるケーブル
絶縁体２が巻装され、更にケーブル絶縁体２上に
は矢張り絶縁紙からなる端末補強絶縁体３が巻装
されていて、その上にAl箔等からなるコンデン
サ用電極箔４が巻装されている。そして、この周
囲を金属製の下部フランジ９と上部フランジ１０
とによつて支持された碍子７によつて包囲し、内
部に絶縁油８が充填せられる。上記下部フランジ
９には端末立上り絶縁補強部１２がケーブル立上
り部接地リード線１１によつて接続されている。[Example] Hereinafter, the deterioration detection method of the present invention will be explained with reference to an illustrated example. FIG. 1 shows the internal structure of a terminal connection part to which the present invention is applied, in which a cable insulator 2 made of insulating paper is wrapped around a cable high-voltage side conductor 1, and a cable insulator 2 made of insulating paper is further wrapped around the cable high-voltage side conductor 1. A terminal reinforcing insulator 3 made of diagonal insulating paper is wrapped around the terminal, and a capacitor electrode foil 4 made of Al foil or the like is wrapped thereon. Then, around this, a metal lower flange 9 and an upper flange 10 are formed.
It is surrounded by an insulator 7 supported by an insulator 7, and the inside is filled with insulating oil 8. A terminal rising insulation reinforcing portion 12 is connected to the lower flange 9 by a cable rising portion grounding lead wire 11.
本発明においては、上記コンデンサ用電極箔４
の接地側電極を対地絶縁して外部に導出してあ
る。即ち、外部引出用リード線５および上記下記
フランジ９に取り付けられた絶縁用ブツシング６
を介して接地側電極は外部に導出されている。 In the present invention, the capacitor electrode foil 4
The ground side electrode is insulated to the ground and led out. That is, the external lead wire 5 and the insulating bushing 6 attached to the flange 9 described below.
The ground side electrode is led out to the outside via.
このように構成されている終端部においては、
商用周波数の高電圧がケーブル導体１に加わる
と、これをケーブル絶縁体２および端末補強絶縁
体３で分担し、その分担効果はコンデンサ用電極
箔４で改善される。このコンデンサは当然のこと
ながら終端部に劣化による部分放電が生じると、
これが高圧導体の微小な対地電位変化となり、こ
れは高周波成分のため、このコンデンサ部を容易
に通過して外部引出用リード線５に流れる充電々
流に部分放電によるパルス性電流成分が重畳され
るようになる。 In the terminal section configured in this way,
When a high voltage at a commercial frequency is applied to the cable conductor 1, the voltage is shared by the cable insulator 2 and the terminal reinforcing insulator 3, and the sharing effect is improved by the capacitor electrode foil 4. Naturally, if a partial discharge occurs due to deterioration at the terminal end of this capacitor,
This causes a minute ground potential change in the high-voltage conductor, and since this is a high-frequency component, a pulsed current component due to partial discharge is superimposed on the charging current that easily passes through this capacitor section and flows to the external lead wire 5. It becomes like this.
従つて、上記リード線５の外部導出端５ａに絶
縁劣化測定器を接続し、常時または任意の時期に
測定して上記パルス性電流成分を検出すれば、終
端部の劣化を知ることができる。 Therefore, if an insulation deterioration measuring device is connected to the external lead-out end 5a of the lead wire 5 and the pulsed current component is detected by measuring at all times or at an arbitrary time, it is possible to know the deterioration of the terminal end.
また、第２図に示すように端末立上り絶縁補強
部１２の一部１２ａを測定リード線に接続する
か、あるいは端末施工時に電極部を内部でリード
線５，５Ａのように接続して一体化しておけば、
立上り絶縁補強部まで高感度で劣化検出が可能と
なる。 In addition, as shown in Fig. 2, a part 12a of the terminal rising insulation reinforcing part 12 can be connected to the measurement lead wire, or the electrode part can be connected internally like the lead wires 5 and 5A when the terminal is installed. If you keep it,
Deterioration can be detected with high sensitivity even in the rising insulation reinforcement section.
なお、本発明はコンデンサ分圧形構造を有する
終端部であれば、上記碍子７内に充填される媒体
は上記実施例のように絶縁油８のみでなく、ガス
絶縁式のものであつてもよいこと勿論である。 In addition, in the present invention, as long as the terminal part has a capacitor partial pressure type structure, the medium filled in the insulator 7 is not only the insulating oil 8 as in the above embodiment, but also a gas insulated type. Of course it's a good thing.
［発明の効果］
以上述べたように、本発明によればコンデンサ
分圧方式における端末補強の接地側電極のみを簡
単な対地絶縁を行なつて外部に取り出すことによ
り、これに測定器を接続するだけで端末部の部分
放電による劣化、あるいは流れる電流の位相角等
から誘電劣化の検出を容易に行うことができる。[Effects of the Invention] As described above, according to the present invention, only the ground side electrode of the terminal reinforcement in the capacitor voltage division method is simply insulated to the ground and taken out to the outside, and a measuring instrument can be connected to it. Deterioration due to partial discharge in the terminal portion or dielectric deterioration can be easily detected from the phase angle of the flowing current.
また、接地側コンデンサ電極が対地絶縁して外
部に測定用として導出されているので、終端部の
絶縁性能の定期点検あるいは常時監視も容易にで
きる。 Furthermore, since the ground-side capacitor electrode is insulated to the ground and led out for measurement, periodic inspection or constant monitoring of the insulation performance of the termination section can be easily performed.
第１図は、本発明の方法の適用された電力ケー
ブル終端部の要部断面図、第２図は、外部引出用
リード線の別の変形例を示す線図である、
４……コンデンサ用電極箔、５……外部引出用
リード線、５ａ……導出端。
FIG. 1 is a cross-sectional view of a main part of a power cable termination part to which the method of the present invention is applied, and FIG. 2 is a line diagram showing another modification of an external lead wire. 4...For capacitors Electrode foil, 5...Lead wire for external extraction, 5a...Leading end.
Claims (1)
端末補強絶縁体を設け、さらにこの上に金属箔か
らなるコンデンサ電極箔を設けたコンデンサ分圧
形の構造を有する終端接続部において、 上記コンデンサ電極箔を対地絶縁してリード線
により外部に導出し、この導出端を絶縁劣化測定
器に接続させ、 上記コンデンサ電極箔に流れる劣化信号成分を
絶縁劣化測定器で検出することにより終端部の絶
縁劣化を測定するようにしたことを特徴とする電
力ケーブルの終端接続部の劣化検出方法。[Scope of Claims] 1. In a terminal connection part having a capacitor partial voltage type structure in which a cable insulator and a terminal reinforcing insulator are provided on the outer periphery of a cable conductor, and a capacitor electrode foil made of metal foil is further provided on the cable insulator and a terminal reinforcing insulator, The capacitor electrode foil is insulated to ground and led out to the outside through a lead wire, and this lead end is connected to an insulation deterioration measuring device.The deterioration signal component flowing through the capacitor electrode foil is detected by the insulation deterioration measuring device. A method for detecting deterioration of a terminal connection part of a power cable, characterized in that the deterioration of insulation of a power cable is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29663085A JPS62156574A (en) | 1985-12-27 | 1985-12-27 | Detecting method for deterioration of terminal connecting part of power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29663085A JPS62156574A (en) | 1985-12-27 | 1985-12-27 | Detecting method for deterioration of terminal connecting part of power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62156574A JPS62156574A (en) | 1987-07-11 |
| JPH0566989B2 true JPH0566989B2 (en) | 1993-09-22 |
Family
ID=17836028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29663085A Granted JPS62156574A (en) | 1985-12-27 | 1985-12-27 | Detecting method for deterioration of terminal connecting part of power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62156574A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640431B2 (en) * | 1973-02-23 | 1981-09-21 | ||
| JPS59104567A (en) * | 1982-12-07 | 1984-06-16 | Hitachi Cable Ltd | Cable electro-mechanical test terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640431U (en) * | 1979-09-04 | 1981-04-15 |
-
1985
- 1985-12-27 JP JP29663085A patent/JPS62156574A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640431B2 (en) * | 1973-02-23 | 1981-09-21 | ||
| JPS59104567A (en) * | 1982-12-07 | 1984-06-16 | Hitachi Cable Ltd | Cable electro-mechanical test terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62156574A (en) | 1987-07-11 |
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