JPH03250710A - Partial discharge detecting device for compressed gas insulation equipment - Google Patents
Partial discharge detecting device for compressed gas insulation equipmentInfo
- Publication number
- JPH03250710A JPH03250710A JP2047805A JP4780590A JPH03250710A JP H03250710 A JPH03250710 A JP H03250710A JP 2047805 A JP2047805 A JP 2047805A JP 4780590 A JP4780590 A JP 4780590A JP H03250710 A JPH03250710 A JP H03250710A
- Authority
- JP
- Japan
- Prior art keywords
- slit
- partial discharge
- insulating
- gas
- compressed gas
- 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.)
- Granted
Links
- 238000009413 insulation Methods 0.000 title abstract description 7
- 239000004020 conductor Substances 0.000 claims abstract description 22
- 125000006850 spacer group Chemical group 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 13
- 239000003302 ferromagnetic material Substances 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000005294 ferromagnetic effect Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract 2
- 230000007547 defect Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 230000005684 electric field Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Housings And Mounting Of Transformers (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明はＳＦ６ガス等の絶縁ガス媒体により高電圧導体
を絶縁するようにしたガス絶縁機器の部分放電検出装置
に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a partial discharge detection device for gas insulated equipment in which a high voltage conductor is insulated by an insulating gas medium such as SF6 gas.
（従来の技術）
近年、変電所等においては接地電位にある金属容器内に
高′亀王導体を配設すると共に絶縁性能の浸れたガス、
例えばＳＦ６ガスを圧縮充填して高電圧導体を絶縁する
構成のガス絶縁開閉装置が採用されている。このガス絶
縁開閉装置に使用されているＳＦ６ガスは、平等電界の
もとでは非常に優れた絶縁特性を示すが、不平等電界の
もとでは極端に絶縁性能が低下する性質がある。(Prior art) In recent years, in substations, etc., a high conductor is placed inside a metal container at ground potential, and a gas impregnated with insulating performance,
For example, a gas insulated switchgear configured to insulate a high voltage conductor by compressing and filling SF6 gas is employed. The SF6 gas used in this gas-insulated switchgear exhibits very excellent insulation properties under an even electric field, but has a property that the insulation performance is extremely degraded under an unequal electric field.
ところで、ガス絶縁機器内の電界分布を乱す要因として
は掻々考えられるが、主なものとして高電圧導体表面の
打痕等の欠陥及び組立時あるいは輸送時に内部に混入す
る金属異物が挙げられる。Incidentally, there are many possible factors that can disturb the electric field distribution within gas-insulated equipment, but the main ones include defects such as dents on the surface of the high-voltage conductor and foreign metal particles that get mixed into the equipment during assembly or transportation.
勿論この他にも組立ミスによる高電圧部の接触不良、更
にはディト等の絶縁スペーサの欠陥等も考えられる。Of course, other possible causes include poor contact in the high voltage section due to assembly errors, and defects in insulating spacers such as Dito.
このような欠陥によりがス絶縁機器内に不平等電界が形
成されると、運転状態において部分放１が発生し、つい
には全路破壊といり重大事態に至る可能ヰがある。した
がって、全路破壊に至る前の部分放電を確実に検出し、
絶縁破壊を未然に防ぐ必要がある。このため、ガス絶ｅ
機器は通常工場試験で食入すな部分放電試験を行ない、
内部の欠陥を予め検出できるように工夫されている。If an unequal electric field is formed in the insulated equipment due to such a defect, partial radiation 1 will occur during operation, and there is a possibility that the entire circuit will be destroyed, resulting in a serious situation. Therefore, it is possible to reliably detect partial discharge before it leads to total path failure.
It is necessary to prevent dielectric breakdown. For this reason, the gas
The equipment is usually subjected to a partial discharge test at the factory to avoid corrosion.
It has been devised so that internal defects can be detected in advance.
一般にかかる工場試験はユニット毎に行なわれるため、
当該ユニットの欠陥については工場での部分放電試験に
より確実に検出することができる。Generally, such factory tests are performed on a unit-by-unit basis, so
Defects in the unit can be reliably detected by partial discharge testing at the factory.
しかしながら、ガス絶縁機器は工場試竣後分解されてユ
ニット毎に現地に輸送され、そこで多数のユニットの組
立が行なわれるため、工場試験合格後のこのような過程
、すなわち輸送時あるいは現地組立ｑ：ＩＶＣ当該ユニ
クトに欠陥が生じる可能性がある。したがって、がス絶
１を機器の信頼性を向上させるためシては、このような
欠陥を現地にて運転開始前に事前に見つける必要がある
ことから、通常は現地組立後に部分放電試験が実施され
ている。However, after passing the factory test, gas insulated equipment is disassembled and transported unit by unit to the site, where a large number of units are assembled. There is a possibility that a defect may occur in the IVC unit. Therefore, in order to eliminate gas leaks and improve equipment reliability, it is necessary to detect such defects on-site before starting operation, so partial discharge tests are usually conducted after on-site assembly. has been done.
しかし、現地では工場内とは異なり、様々な！気的およ
び機械的稚音（ノイズ）があるため、感度の高い部分放
電試験は難しい。However, unlike inside the factory, there are various things that can happen on-site! Sensitive partial discharge testing is difficult due to the presence of mechanical and mechanical noise.
そこで、従来このような欠点を除くため種々の部分放電
検出手段が提案されており、その−例を第２図を用いて
説明する。即ち、第２図に示すように接地電位の互いに
対向する一対の金属容器Ｉ。Therefore, various partial discharge detection means have been proposed in the past in order to eliminate such drawbacks, and examples thereof will be explained using FIG. 2. That is, as shown in FIG. 2, a pair of metal containers I facing each other are at ground potential.
２内には高電圧導体３が配設されると共にＳＦ６がスの
ような絶縁性能の優れた絶縁ガス媒体４が所定のガス圧
力で圧縮光てんされている。金属容器１と金属容器２の
端フランツＩＩＬ、Ｘｔｈ間には絶縁スペーサ５が挾ま
れ、高電圧導体３を絶縁支持すると共に金属容器１．２
をガス区分して１図示しないボルト等により結合してい
るうそして、この絶縁ス（−サ５により互いに絶縁され
た金属容器１．２間の′直圧をモニターするだめのケー
ブル６が金属容器１．２に夫々接続されている７このよ
うな部分放電検出装置においては、金属容器）または２
の内部、例えば高電圧導体３の表面で部分放電が発生し
た場合、それに起因してパルス１圧が金属容器ｌと２の
間に発生する。この・２ルス覗圧はケーブル６により監
視装置に伝送してモニターされ、・々シス１圧の発生に
より部分放電を検出するようになっている。A high-voltage conductor 3 is disposed within the chamber 2, and an insulating gas medium 4 having excellent insulation performance, such as SF6 gas, is compressed at a predetermined gas pressure. An insulating spacer 5 is interposed between the ends IIL and Xth of the metal container 1 and the metal container 2, and insulates and supports the high voltage conductor 3 and also protects the metal container 1.2.
A cable 6 for monitoring the direct pressure between the metal containers 1 and 2, which are insulated from each other by an insulator 5, is connected to the metal container. 1.7 In such a partial discharge detection device, the metal container is connected to the
When a partial discharge occurs inside the metal container 1, for example on the surface of the high voltage conductor 3, a pulse 1 pressure is generated between the metal containers 1 and 2 due to this. This .2 rus peeking pressure is transmitted to a monitoring device via a cable 6 and monitored, and partial discharge is detected by the occurrence of .2 rus 1 pressure.
（発明が解決しようとする課題）
しかし、変電所等においては、送電線等を伝搬して外部
から種々の周波数のノイｆ醒圧が高電圧導体に侵入して
きており、これらのノイｆ亀圧が重畳したモニタ波形か
ら部分放電による・９ルス置圧だけを正確に取り出すこ
とは非常に難しい。(Problem to be solved by the invention) However, in substations, etc., noise f disturbance pressures of various frequencies invade high voltage conductors from the outside by propagating through power transmission lines, etc., and these noise f disturbance pressures It is very difficult to accurately extract only the 9-rus pressure due to partial discharge from the monitor waveform superimposed with
特に第２図のように絶縁スペーサ５により絶縁された２
つの金属容器１，２間の直圧をモニターする部分放電検
出装置では、このような同波数選別機能を持たないため
部分放電による・ｌルス信号だけをＳ／Ｎ比よく検出す
ることができない７本発明は以上の欠点を除去してガス
絶縁機器間で発生する部分放電を高感度で検出すること
ができ、′！Ｒ成が簡単で、且つ安価なガス絶縁機器の
部分放電検出装置を提供することを目的とするっ［発明
の構成］
（課題を解決するための手段）
本発明は上記目的を達成するために、フランツ間に絶縁
ス４−サを挾んで互いに結合され友金属容器内に高直圧
導体と共に絶縁ガスを内部に圧縮封入したガス絶縁機器
の部分放電検出装置において、前記絶縁スペーサの絶縁
フランジ部に絶縁部分の長さを調整できるスリット導体
と強磁性体カバーを設ける構成としたものである。In particular, as shown in FIG.
The partial discharge detection device that monitors the direct pressure between the two metal containers 1 and 2 does not have this same wave number selection function, so it cannot detect only the pulse signal caused by partial discharge with a good S/N ratio. The present invention eliminates the above drawbacks and can detect partial discharges occurring between gas-insulated devices with high sensitivity. It is an object of the present invention to provide a partial discharge detection device for gas insulated equipment that is easy to configure and is inexpensive. [Structure of the Invention] (Means for Solving the Problems) , in a partial discharge detection device for gas insulated equipment, which is connected to each other with an insulating spacer sandwiched between the flanges, and insulating gas is compressed and sealed inside a companion metal container together with a high direct voltage conductor, the insulating flange portion of the insulating spacer The structure includes a slit conductor and a ferromagnetic cover that can adjust the length of the insulating part.
（作 用）
コノようにすると、ｅ縁スペーサの絶縁フランツ部を囲
むスリット導体のスリット部がスリットアンテナとして
作用し、このスリットアンテナの共振周波数をスリット
の幅を調整することにより変更することができる。また
、部分放電に起内して金属容器に流れる電流がスリット
アンテナの近傍へ集中して流れるように強磁性体を配置
し、かつスリットアンテナの共振周波数を部分放電によ
る信号の周波数に調整しておくことにより、ノイズの重
畳したモニタ波形の中からＳ／Ｎ比よく部分牧電江起因
した・ぞルス信号を検出することができる。(Function) When configured like this, the slit part of the slit conductor surrounding the insulating flantz part of the e-edge spacer acts as a slit antenna, and the resonant frequency of this slit antenna can be changed by adjusting the width of the slit. . In addition, the ferromagnetic material is arranged so that the current flowing into the metal container due to the partial discharge is concentrated near the slit antenna, and the resonant frequency of the slit antenna is adjusted to the frequency of the signal caused by the partial discharge. By setting this, it is possible to detect the noise signal partially caused by Makidenjie with a good S/N ratio from the monitor waveform on which noise is superimposed.
（実施例）
以下、本発明の一実施例を図面を参照して説明する。第
１図は本発明によるガスｅ縁機器の部分放電検出装置の
構成を示すものである。第１図において、１．２！／′
ｉ基礎上に対向して配置され、且つ図示しない支持部材
により支持された接電電位の金属容器で、この金属容器
１．２の内部には高電圧導体３が配設されるとともに、
絶縁性能の優れた、例えばＳＦ６がス等の絶縁ガス媒体
４が所定の圧力で圧縮光てんてれている。筐た、金属容
器ノと２の端フランツＺＩＬ、２Ｎの間には絶縁ス・ξ
−サ５が挾まれ、高電圧導体３を絶縁支持すると共に金
属容器１．２をガス区分し図示しないデルト等により結
合している。更に、この絶縁スペーサ５の周囲には、ス
リット７＆が形成されこのスリット７＆の絶縁スペーサ
５の絶縁フランツＳ＆に沿った円周方向の長さｄが可変
なカバー７が取り付けられている。このカバー７のスリ
ット７ａから離れた反対側部分は強磁性体８により構成
されており、スリット７１Ｌ周辺のみ導体９で構成され
ている。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of a partial discharge detection device for gas e-edge equipment according to the present invention. In Figure 1, 1.2! /′
i A metal container with a grounding potential that is disposed facing on the foundation and supported by a support member (not shown), and a high voltage conductor 3 is disposed inside this metal container 1.2, and
An insulating gas medium 4 having excellent insulating performance, such as SF6 gas, is compressed at a predetermined pressure. There is an insulating strip between the metal container and the 2nd end Franz ZIL, 2N.
- The metal container 1.2 is sandwiched between the metal containers 1.2 and 1.2 to insulate and support the high-voltage conductor 3, and the metal container 1.2 is gas-divided and connected by a not-shown delt or the like. Furthermore, a cover 7 is attached around the insulating spacer 5, in which a slit 7& is formed and the length d of the slit 7& in the circumferential direction along the insulating flange S& of the insulating spacer 5 is variable. The opposite side of the cover 7 away from the slit 7a is made of a ferromagnetic material 8, and only the periphery of the slit 71L is made of a conductor 9.
この様な構成のガス絶縁機器の部分放電検出装置におい
て１例えば金属容器！内に部分放電が発生すると立ち上
り時間が数Ｉｍという極めて高い周波数の高周波電流が
発生する。この様な高周波電流は高電圧導体３を流れる
と同時に金属容器１の内面を流れる。従って、カバー７
のスリット７＆とケーブル６で構成されるスリットアン
テナの共振＠波数を部分放電による高周波電流に一致さ
せておけばスリットアンテナにより高周波電流を検出し
、部分放電の発生を検出することができる。In a partial discharge detection device for gas insulated equipment with such a configuration, 1. For example, a metal container! When a partial discharge occurs within the battery, a high frequency current with an extremely high frequency with a rise time of several Im is generated. Such high frequency current flows through the high voltage conductor 3 and at the same time flows through the inner surface of the metal container 1. Therefore, cover 7
If the resonance@wavenumber of the slit antenna composed of the slit 7& and the cable 6 is made to match the high frequency current due to partial discharge, the high frequency current can be detected by the slit antenna, and the occurrence of partial discharge can be detected.
このように部分放電による信号を検出する際スリットア
ンテナ周辺での部分放電による高周波直流の密度が大き
いほどＳ／Ｎ比よく部分放電を検出することができる。In this manner, when detecting a signal due to partial discharge, the higher the density of high-frequency direct current due to partial discharge around the slit antenna, the better the S/N ratio can be for detecting partial discharge.
カバー７のスリット７ａから離れた部分が強磁性体８で
構成されていると、高周波電流に対する強磁性体８のイ
ンピーダンスが大きいため、高周波電流は導体９の部分
に矢印で示すように集中する。これにより、スリットア
ンテナのＳ／Ｎ比がよくなり、部分放電による信号をノ
イズの影響が少く検出することができる。部分放電によ
る高周波電流の周波数は変電所の構成により変化する可
能性があるが、スリットの長さを可変とすれば各変電所
に応じてスリットアンテナの共振周波数を調整すること
ができる。If the portion of the cover 7 away from the slit 7a is made of the ferromagnetic material 8, the impedance of the ferromagnetic material 8 to the high frequency current is large, so that the high frequency current is concentrated on the portion of the conductor 9 as shown by the arrow. As a result, the S/N ratio of the slit antenna is improved, and signals caused by partial discharge can be detected with less influence of noise. The frequency of high-frequency current caused by partial discharge may change depending on the configuration of the substation, but if the length of the slit is made variable, the resonant frequency of the slit antenna can be adjusted depending on each substation.
なお、上記実施例では、金属容器１，２の外側にカバー
７を取り付けたが、第３図に示すように金属容器ノ、２
の内面側にスリットを形成した内側カバー７を設けるよ
うにしてもよい。In the above embodiment, the cover 7 was attached to the outside of the metal containers 1 and 2, but as shown in FIG.
An inner cover 7 having a slit formed on the inner surface side may be provided.
［発明の効果］
以上説明したように、本発明によれば、絶縁スに一すを
挾んで結合された接地を位の金属容器内に高電圧導体と
共に絶縁ガスが圧縮封入され九ガス絶縁機器の部分放電
検出装置において、前記絶縁スぜ−サの周辺に部分放電
に起因する高周波電流を検出するスリットアンテナを構
成するスリットを形成し、スリットから離れた部分が１
磁性体で構成されるカバーを取り付けるようにしたので
、ガス絶縁機器内で発生する部分放電を高感度で検出す
ることができ、構成が、を単で且つ安価なガス絶縁機器
り部分数１検出装置を得ることができる。[Effects of the Invention] As explained above, according to the present invention, an insulating gas is compressed and sealed together with a high voltage conductor in a metal container with a ground connected to the insulating gas in between. In this partial discharge detection device, a slit constituting a slit antenna for detecting high frequency current caused by partial discharge is formed around the insulating breather, and a portion away from the slit is 1.
By attaching a cover made of magnetic material, it is possible to detect partial discharges occurring within gas-insulated equipment with high sensitivity, and the configuration is simple and inexpensive. You can get the equipment.
第１図は本発明の一実施例を示す断面図で、（１）は正
面図、（ｂ）は側面図、第２図は従来の部分放電検出装
置を示す断面図、第３図は本発明の他の実施例を示す断
面図で、（ａ）は正面図、（ｂ）は側面図である。
１．２・・・金属容器、３・・・高電圧導体、４・・・
絶縁ガス媒体、５・・・絶縁スペーサ、６・・・ケーブ
ル、７・・・カバー ７ａ・・・スリット、８・・・強
磁性体、９・・・導体。
出頼人代理人Fig. 1 is a sectional view showing an embodiment of the present invention, (1) is a front view, (b) is a side view, Fig. 2 is a sectional view showing a conventional partial discharge detection device, and Fig. 3 is a main view. It is sectional drawing which shows another Example of this invention, (a) is a front view, (b) is a side view. 1.2...Metal container, 3...High voltage conductor, 4...
Insulating gas medium, 5... Insulating spacer, 6... Cable, 7... Cover 7a... Slit, 8... Ferromagnetic material, 9... Conductor. client's agent
Claims (1)
内に高電圧導体と共に絶縁ガスが圧縮封入されたガス絶
縁機器の部分放電検出装置において、前記絶縁スペーサ
の周辺に部分放電に起因する高周波電流を検出するスリ
ットアンテナを構成するスリットを形成し、スリットか
ら離れた部分が強磁性体で構成されるカバーを取り付け
たことを特徴とするガス絶縁機器の部分放電検出装置。In a partial discharge detection device for gas-insulated equipment in which an insulating gas is compressed and sealed together with a high voltage conductor in a metal container at ground potential that is connected with an insulating spacer in between, a high-frequency current caused by the partial discharge is generated around the insulating spacer. 1. A partial discharge detection device for gas-insulated equipment, characterized in that a slit forming a slit antenna for detection is formed, and a cover made of a ferromagnetic material is attached to a portion remote from the slit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2047805A JP2693008B2 (en) | 1990-02-28 | 1990-02-28 | Partial discharge detector for gas insulated equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2047805A JP2693008B2 (en) | 1990-02-28 | 1990-02-28 | Partial discharge detector for gas insulated equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03250710A true JPH03250710A (en) | 1991-11-08 |
| JP2693008B2 JP2693008B2 (en) | 1997-12-17 |
Family
ID=12785585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2047805A Expired - Fee Related JP2693008B2 (en) | 1990-02-28 | 1990-02-28 | Partial discharge detector for gas insulated equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2693008B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0621489A2 (en) * | 1993-03-24 | 1994-10-26 | Schneider Electric Sa | Partial discharge detecting device for electric high voltage appliance |
| JP2007263640A (en) * | 2006-03-28 | 2007-10-11 | Toshiba Corp | Partial discharge detector |
| CN107807311A (en) * | 2017-09-26 | 2018-03-16 | 杭州西湖电子研究所 | A kind of capacitive sleeve pipe high frequency partial discharge signal detection device |
| CN107831410A (en) * | 2017-09-26 | 2018-03-23 | 杭州西湖电子研究所 | A kind of capacitive bottom shielding of bushing signal supervisory instrument |
-
1990
- 1990-02-28 JP JP2047805A patent/JP2693008B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0621489A2 (en) * | 1993-03-24 | 1994-10-26 | Schneider Electric Sa | Partial discharge detecting device for electric high voltage appliance |
| EP0621489A3 (en) * | 1993-03-24 | 1995-04-12 | Merlin Gerin | Partial discharge detecting device for electric high voltage appliance. |
| JP2007263640A (en) * | 2006-03-28 | 2007-10-11 | Toshiba Corp | Partial discharge detector |
| JP4703455B2 (en) * | 2006-03-28 | 2011-06-15 | 株式会社東芝 | Partial discharge detector |
| CN107807311A (en) * | 2017-09-26 | 2018-03-16 | 杭州西湖电子研究所 | A kind of capacitive sleeve pipe high frequency partial discharge signal detection device |
| CN107831410A (en) * | 2017-09-26 | 2018-03-23 | 杭州西湖电子研究所 | A kind of capacitive bottom shielding of bushing signal supervisory instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2693008B2 (en) | 1997-12-17 |
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