JPH02311104A - Compressed gas insulation switching device - Google Patents
Compressed gas insulation switching deviceInfo
- Publication number
- JPH02311104A JPH02311104A JP1131363A JP13136389A JPH02311104A JP H02311104 A JPH02311104 A JP H02311104A JP 1131363 A JP1131363 A JP 1131363A JP 13136389 A JP13136389 A JP 13136389A JP H02311104 A JPH02311104 A JP H02311104A
- Authority
- JP
- Japan
- Prior art keywords
- insulated switchgear
- insulator
- gas insulated
- coupling electrode
- 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.)
- Pending
Links
- 238000009413 insulation Methods 0.000 title claims abstract 4
- 230000008878 coupling Effects 0.000 claims abstract description 30
- 238000010168 coupling process Methods 0.000 claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 claims abstract description 30
- 239000012212 insulator Substances 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 claims 1
- 239000003822 epoxy resin Substances 0.000 claims 1
- 229920000647 polyepoxide Polymers 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000004020 conductor Substances 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000001228 spectrum Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Installation Of Bus-Bars (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はガス絶縁開閉装置(以下、GISと略す)の内
部で発生する微小部分放電を測定するのに適切な検出器
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a detector suitable for measuring minute partial discharges occurring inside a gas insulated switchgear (hereinafter abbreviated as GIS).
従来の装置は、GIS内部に発生する微小部分放電を検
出するために、GISタンクのハンド・ホール内に結合
電極を設け、これの信号を密封端子を介してGIS外部
に導いていた。この種の装置に関連するものには、日立
評論 voff、7ONα8第105頁から第112頁
のr過変f!設備の予測保全システム」が挙げられる。In the conventional device, in order to detect minute partial discharges occurring inside the GIS, a coupling electrode is provided in the hand hole of the GIS tank, and a signal from this is guided to the outside of the GIS via a sealed terminal. Related to this type of device, see Hitachi Review voff, 7ONα8, pages 105 to 112, r overvariant f! "Equipment Predictive Maintenance System".
上記従来技術はGISの気密性、及び、信号の伝送特性
の点について完全な配慮がされておらず。The above-mentioned conventional technology does not fully consider the airtightness of GIS and the signal transmission characteristics.
ガス漏れが発生する可能性があること、及び、信号の伝
送を忠実に行えない問題があった。即ち、前者は密封端
子部の気密性が必ずしも信頼のおけるものでないことに
よる。一方、後者は従来の密封端子の導体が、単に、タ
ンクを貫通するような構造であり、数MHz以上の高周
波信号の伝送を忠実に行えないことによる。There were problems such as the possibility of gas leakage and the inability to faithfully transmit signals. That is, the former is due to the fact that the airtightness of the sealed terminal portion is not necessarily reliable. On the other hand, the latter is due to the fact that the conductor of the conventional sealed terminal simply passes through the tank, and cannot faithfully transmit high frequency signals of several MHz or higher.
本発明はGIS内部の微小部分放電を検出することがで
き、ガス漏れが発生しないようにGISの信頼性を高く
することを目的としており、さらに、忠実な信号検出を
行えるようにすることを目的とする。The present invention is capable of detecting minute partial discharges inside a GIS, and aims to increase the reliability of the GIS so that gas leaks do not occur, and further aims to enable faithful signal detection. shall be.
上記目的を達成するために、GIS内部の微小部分放電
を検出する結合電極をGrSの外部に出し、微小部分放
電による電磁波信号はタンクのフランジに設けた結合絶
縁体を介して外部に出るようにしたものである。In order to achieve the above objective, the coupling electrode for detecting minute partial discharges inside the GIS is placed outside the GrS, and the electromagnetic wave signal due to minute partial discharges is output to the outside via the coupling insulator provided on the flange of the tank. This is what I did.
他の目的を達成するためには、従来技術で使っていた密
封端子を、−切、使わないようにし1周知の高周波伝送
系を用いるようにしたものである。In order to achieve the other purpose, the sealed terminal used in the prior art is cut off and not used, and a well-known high frequency transmission system is used.
微小部分放電により発生する数MHz以主の高周波電磁
波は、金属体があれば透過せず5反射するが、絶縁体の
場合は透過する。また、ガスの気密は金属体でも絶縁体
でも行える。従って、GISの外部に高周波の電磁波を
導出できるように所定のGISハンドホールの当て板に
絶縁板を用いた。High-frequency electromagnetic waves of several MHz or higher generated by minute partial discharges do not pass through a metal body and are reflected, but are transmitted through an insulator. Further, gas-tightness can be achieved with either a metal body or an insulator. Therefore, an insulating plate was used as a cover plate for a predetermined GIS handhole so that high-frequency electromagnetic waves could be guided to the outside of the GIS.
また、従来の密封端子は小型の貫通ブッシングであり、
貫通導体が長さ方向の位置によりインピーダンスが異な
るため高周波の電磁波を忠実に伝送できないが、本発明
ではGIS外部に電磁波が導出されるため、外部に設け
た結合電極に現われた電磁波を適切な高周波ケーブルで
所定の測定装置に伝送できる。In addition, conventional sealed terminals are small through bushings,
Since the impedance of the through conductor varies depending on its position in the length direction, high-frequency electromagnetic waves cannot be faithfully transmitted. However, in the present invention, the electromagnetic waves are guided outside the GIS, so the electromagnetic waves appearing at the coupling electrode provided outside are transmitted to the appropriate high-frequency It can be transmitted via cable to a designated measuring device.
以下、本発明の一実施例を第1図および第2図により説
明する。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
例えば、GISのガス母線の断面は第1図のようであり
、同軸円筒の高圧導体1と圧力タンク2が数気圧のSF
eガス3で絶縁され、図示しないスペーサにより機械的
に支持されている。一般に。For example, the cross section of a GIS gas bus line is as shown in Figure 1, where a coaxial cylindrical high voltage conductor 1 and a pressure tank 2 are connected to an SF of several atmospheres.
It is insulated with e-gas 3 and mechanically supported by a spacer (not shown). in general.
タンク2には吸着材を設置するようなハンドホールが取
り付けられる。本発明では第1図のように特別のハンド
ホール4をタンク2に設けた。即ち、このハンドホール
4にはタンク2から出ている開口部5にフランジ6が設
けられており、フランジ6に本発明の絶縁透過板7.結
合電極部8、金属板9がサンドイッチ状に取り付けられ
ている。これらには取り付は穴が周囲に設けられており
、ボルト10、ナツト11によって締め付けられ、フラ
ンジ6に固定されている。また、金、肩板9に信号引出
用孔12が開いており、さらに信号中継箱13が金属板
9に設けられている。中継箱13から所定の高周波同軸
ケーブル14により図示しないが、電磁波測定装置1例
えば、前段増幅器を介してスペクトルアナライザに電磁
波信号を伝送する。A hand hole is attached to the tank 2 for installing an adsorbent. In the present invention, a special hand hole 4 is provided in the tank 2 as shown in FIG. That is, this hand hole 4 is provided with a flange 6 at an opening 5 protruding from the tank 2, and the flange 6 is provided with an insulating transparent plate 7 of the present invention. A coupling electrode section 8 and a metal plate 9 are attached in a sandwich manner. For mounting, holes are provided around the periphery, and these are tightened with bolts 10 and nuts 11 to be fixed to the flange 6. Further, a signal extraction hole 12 is opened in the metal shoulder plate 9, and a signal relay box 13 is further provided in the metal plate 9. Though not shown, an electromagnetic wave signal is transmitted from the relay box 13 to a spectrum analyzer via a pre-stage amplifier of the electromagnetic wave measuring device 1, for example, through a predetermined high-frequency coaxial cable 14 (not shown).
なお、フランジ6には円周溝15が設けられており、絶
縁透過板7と溝内に挿入したパツキン16によってGI
Sの気密を確保することができる。Note that the flange 6 is provided with a circumferential groove 15, and the GI
The airtightness of S can be ensured.
結合電極部8、中継箱13などの詳細を第2図に示す、
結合電極部8は絶縁透過板7と面する結合電極20、フ
ィルムシート21(例えば、カプトンフィルム)及び接
地電極22から構成されている。接地電極22は接続部
23を介して、金属板9につなぎ、接地電位が確保され
ている。フィルムシート21.接地電極22には信号引
出貫通孔24が設けてあり、結合電極20の信号は接続
点25から引出され、導体、及び、マツチング抵抗26
(必要に応じて付ける)を介して高周波同軸ケーブル2
7により、金属板9に設けられた貫通孔28を通って、
外に導かれる。なお、高周波同軸ケーブル27のシース
29は接地電極22に接続される。Details of the coupling electrode section 8, relay box 13, etc. are shown in FIG.
The coupling electrode section 8 is composed of a coupling electrode 20 facing the insulating transparent plate 7, a film sheet 21 (for example, Kapton film), and a ground electrode 22. The ground electrode 22 is connected to the metal plate 9 via a connecting portion 23 to ensure a ground potential. Film sheet 21. A signal extraction through hole 24 is provided in the ground electrode 22, and the signal of the coupling electrode 20 is extracted from a connection point 25, and is connected to a conductor and a matching resistor 26.
(attached if necessary) via high frequency coaxial cable 2
7, through the through hole 28 provided in the metal plate 9,
led outside. Note that the sheath 29 of the high frequency coaxial cable 27 is connected to the ground electrode 22.
高周波同軸ケーブル27は中継箱13を介して、高周波
同軸ケーブル14に至る。The high frequency coaxial cable 27 reaches the high frequency coaxial cable 14 via the relay box 13.
GIS内部に、例えば、金属線の異物が存在し、ここか
ら部分放電が発生しているとこれによる電磁波が高圧導
体1を介して、GIS内を伝搬する。If a foreign object, for example a metal wire, is present inside the GIS and a partial discharge is generated therefrom, electromagnetic waves caused by this will propagate inside the GIS via the high voltage conductor 1.
即ち、導体1からタンク方向に電磁波が伝搬し。That is, electromagnetic waves propagate from the conductor 1 toward the tank.
本発明の場合、この電磁波はフランジ4の開口部5を通
り、さらに絶縁透過体7も通り、結合電極20に到達す
る。つまり、G・IS内部の電磁波がGIS外部に引出
されたことになる。結合電極20の電磁波は伝送特性の
良いマツチング抵抗26及び高周波同軸ケーブル27.
14を介して。In the case of the present invention, this electromagnetic wave passes through the opening 5 of the flange 4 and also passes through the insulating transparent body 7 to reach the coupling electrode 20. In other words, the electromagnetic waves inside the G-IS are extracted to the outside of the GIS. The electromagnetic waves of the coupling electrode 20 are transmitted through a matching resistor 26 with good transmission characteristics and a high frequency coaxial cable 27.
Via 14.
前段増幅器、スペクトルアナライザ等の高周波電磁波測
定器に伝送される。The signal is transmitted to a high-frequency electromagnetic wave measuring device such as a preamplifier or spectrum analyzer.
本実施例によれば、GIS内部に発生した微小部分放電
による数MHz以上の高周波電磁波信号をGIS外部に
引出すことが出来、従来と同様の気密構造を用いること
が出来、ガス漏れが発生することなく、内部の微小部分
放電を精度良く検出することができる。別の効果として
、この測定系を導体1とタンク2間で発生する高周波サ
ージ電圧の測定にも使える。According to this embodiment, high-frequency electromagnetic wave signals of several MHz or higher due to minute partial discharges generated inside the GIS can be extracted to the outside of the GIS, and the same airtight structure as the conventional one can be used, which prevents gas leakage from occurring. Therefore, internal minute partial discharges can be detected with high accuracy. Another advantage is that this measurement system can also be used to measure high frequency surge voltages generated between the conductor 1 and the tank 2.
第3図は本発明の変形例であり、ハンドホール4の開口
部5の空間が電磁波の伝搬に支障をきたす場合、絶縁透
過板7の上に減衰低減金属50を設ける。このようにす
ると結合電極をGISの内部に入れたと同様の微小部分
放電検出の効果がある。FIG. 3 shows a modification of the present invention, in which an attenuation reducing metal 50 is provided on the insulating and transparent plate 7 when the space of the opening 5 of the handhole 4 interferes with the propagation of electromagnetic waves. In this way, there is an effect of detecting minute partial discharges similar to when a coupling electrode is placed inside a GIS.
第4図は他の変形例であり、第1図の金属板9を省略し
た例である。より単純な構成にできる効果があるが、結
合f!!極部8のカバー60が必要となる。もちろん、
結合電極部8内の接地電極22はタンク2と同電位に構
成される。FIG. 4 shows another modification, in which the metal plate 9 in FIG. 1 is omitted. Although it has the effect of making the configuration simpler, the combination f! ! A cover 60 for the pole portion 8 is required. of course,
The ground electrode 22 in the coupling electrode section 8 is configured to have the same potential as the tank 2 .
なお、第2図において、結合電極20、接地電極12は
フィルム・シート21に金属を蒸着して形成することも
できる。この場合、取付がより簡便になる効果がある。In addition, in FIG. 2, the coupling electrode 20 and the ground electrode 12 can also be formed by vapor depositing metal on a film sheet 21. In this case, there is an effect that the installation becomes easier.
本発明によれば、従来のように密封端子を使わないで、
GISのタンクに設けたハンドホールと絶縁透過板の組
合せにより内部の高周波の電磁波を外部に導出すること
ができるのでGIS内部で発生し゛た微小部分放電の検
出をガス漏れ現象を呈することなく行うことができる。According to the present invention, without using a sealed terminal as in the past,
The combination of the hand hole provided in the GIS tank and the insulating transparent plate allows the internal high-frequency electromagnetic waves to be guided to the outside, so it is possible to detect minute partial discharges generated inside the GIS without causing gas leakage phenomena. I can do it.
また、密封端子を使わず、高周波用同軸ケーブルにより
信号を伝送できるので内部の高周波電磁波を忠実に測定
装置に伝送することができる。Furthermore, since signals can be transmitted using a high-frequency coaxial cable without using sealed terminals, internal high-frequency electromagnetic waves can be faithfully transmitted to the measuring device.
第1図は本発明の一実施例のGIS微小部分放電の検出
部の断面図、第2図は第1図の結合電極部分の断面図、
第3図、第4図はそれぞれ本発明の第二、第三の実施例
の断面図である。
4・・・ハンドホール、6・・・フランジ、7・・・絶
縁透過板、8・・・結合電極部、20・・・結合電極、
21・・・フィルム・シート、22・・・接地ffi極
、26・・・マッチ231図
第2図
第3図FIG. 1 is a cross-sectional view of a GIS minute partial discharge detection section according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the coupling electrode portion of FIG. 1,
3 and 4 are sectional views of second and third embodiments of the present invention, respectively. 4... Hand hole, 6... Flange, 7... Insulating transparent plate, 8... Coupling electrode part, 20... Coupling electrode,
21... Film sheet, 22... Ground ffi pole, 26... Match 231 Figure 2 Figure 3
Claims (1)
過できる絶縁体を設け、気密構造とし、前記絶縁体の大
気側に結合電極部を取付け、この電極から前記電磁波を
測定し、前記ガス絶縁開閉装置の内部に発生した部分放
電を検出することを特徴とするガス絶縁開閉装置。 2、請求項1において、前記電磁波を透過できる前記絶
縁体の高気圧ガス側に電磁波伝搬減衰の低減用金属体を
設けたことを特徴とするガス絶縁開閉装置。 3、請求項1において、前記電磁波を透過する前記絶縁
体の大気側に結合電極部を設け、さらに機械的補強の役
目をする金属体を外側に配置することを特徴とするガス
絶縁開閉装置。 4、請求項1において、前記結合電極部を結合電極、絶
縁フィルムシート、接地電極で構成したことを特徴とす
るガス絶縁開閉装置。 5、請求項1において、前記結合電極部を円板状にした
ことを特徴とするガス絶縁開閉装置。 6、請求項1において、前記結合電極部の結合電極の形
状を線状、または、片状にしたことを特徴とするガス絶
縁開閉装置。 7、請求項1において、電磁波を透過する絶縁体として
フィラー入りエポキシ樹脂を材料とする固体絶縁物を使
うことを特徴とするガス絶縁開閉装置。 8、請求項1において、複数個の検出部分を設けること
を特徴とするガス絶縁開閉装置。 9、SF_6ガスを用いるガス絶縁開閉装置において、
圧力タンクに開口部を設け、前記開口部のフランジに絶
縁体を設け、気密構造とし、絶縁体の大気側に結合電極
と絶縁フィルム・シートと接地電極で構成した結合電極
部を設けるようにしたことを特徴とするガス絶縁開閉装
置。 10、SF_6ガスを用いるガス絶縁開閉装置において
、圧力タンクに開口部を設け、そのフランジに絶縁体を
設け、気密構造とし、絶縁体の大気側に結合電極を設け
、ガス絶縁開閉装置の内部の部分放電を検出することを
特徴とする診断システム。 11、請求項10において、部分放電の位置標定を行い
、絶縁異常の進展具合を判定することを特徴とする診断
システム。[Claims] 1. In a gas insulated switchgear using SF_6 gas, an opening is provided in the pressure tank, an insulator that can transmit electromagnetic waves is provided on the flange of the opening, an airtight structure is formed, and the insulator is connected to the atmosphere side. A gas insulated switchgear, characterized in that an electrode part is attached, the electromagnetic waves are measured from the electrode, and partial discharge generated inside the gas insulated switchgear is detected. 2. The gas insulated switchgear according to claim 1, further comprising a metal body for reducing electromagnetic wave propagation attenuation provided on the high-pressure gas side of the insulator through which the electromagnetic waves can pass. 3. The gas insulated switchgear according to claim 1, wherein a coupling electrode portion is provided on the atmosphere side of the insulator that transmits the electromagnetic waves, and further a metal body serving as mechanical reinforcement is placed outside. 4. The gas insulated switchgear according to claim 1, wherein the coupling electrode section is composed of a coupling electrode, an insulating film sheet, and a ground electrode. 5. The gas insulated switchgear according to claim 1, wherein the coupling electrode portion is disk-shaped. 6. The gas insulated switchgear according to claim 1, wherein the coupling electrode of the coupling electrode portion has a linear shape or a strip shape. 7. A gas insulated switchgear according to claim 1, characterized in that a solid insulator made of filled epoxy resin is used as the insulator that transmits electromagnetic waves. 8. The gas insulated switchgear according to claim 1, characterized in that a plurality of detection parts are provided. 9. In gas insulated switchgear using SF_6 gas,
An opening is provided in the pressure tank, an insulator is provided on the flange of the opening to create an airtight structure, and a coupling electrode section consisting of a coupling electrode, an insulating film/sheet, and a ground electrode is provided on the atmosphere side of the insulator. A gas insulated switchgear characterized by: 10. In gas insulated switchgear using SF_6 gas, an opening is provided in the pressure tank, an insulator is provided on the flange of the pressure tank, an airtight structure is provided, and a coupling electrode is provided on the atmosphere side of the insulator, and the inside of the gas insulated switchgear is A diagnostic system characterized by detecting partial discharge. 11. The diagnostic system according to claim 10, wherein the diagnostic system locates the position of the partial discharge and determines the progress of the insulation abnormality.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1131363A JPH02311104A (en) | 1989-05-26 | 1989-05-26 | Compressed gas insulation switching device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1131363A JPH02311104A (en) | 1989-05-26 | 1989-05-26 | Compressed gas insulation switching device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02311104A true JPH02311104A (en) | 1990-12-26 |
Family
ID=15056177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1131363A Pending JPH02311104A (en) | 1989-05-26 | 1989-05-26 | Compressed gas insulation switching device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02311104A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006047285A (en) * | 2004-06-29 | 2006-02-16 | Japan Ae Power Systems Corp | Partial discharge sensor, partial discharge sensing device, and gas insulated electrical equipment with partial discharge sensor |
-
1989
- 1989-05-26 JP JP1131363A patent/JPH02311104A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006047285A (en) * | 2004-06-29 | 2006-02-16 | Japan Ae Power Systems Corp | Partial discharge sensor, partial discharge sensing device, and gas insulated electrical equipment with partial discharge sensor |
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