JPS6111522B2 - - Google Patents
Info
- Publication number
- JPS6111522B2 JPS6111522B2 JP54047790A JP4779079A JPS6111522B2 JP S6111522 B2 JPS6111522 B2 JP S6111522B2 JP 54047790 A JP54047790 A JP 54047790A JP 4779079 A JP4779079 A JP 4779079A JP S6111522 B2 JPS6111522 B2 JP S6111522B2
- Authority
- JP
- Japan
- Prior art keywords
- metal container
- cylindrical metal
- main electrode
- grounding wire
- failure prediction
- 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
Links
- 239000002184 metal Substances 0.000 claims description 37
- 229910052751 metal Inorganic materials 0.000 claims description 37
- 239000012212 insulator Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 230000005856 abnormality Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
Landscapes
- Locating Faults (AREA)
- Gas-Insulated Switchgears (AREA)
- Protection Of Static Devices (AREA)
Description
【発明の詳細な説明】
この発明は、開閉器本体に接続された主電極を
内蔵しかつSF6（六フツ化硫黄）ガスなどの絶縁
媒体を封入した接地金属容器形電力用開閉機器の
内部異常を検出するようにした開閉機器の故障予
知装置に関する。[Detailed Description of the Invention] This invention provides an internal structure of a grounded metal container-type power switchgear which has a built-in main electrode connected to the switch body and is filled with an insulating medium such as SF 6 (sulfur hexafluoride) gas. The present invention relates to a failure prediction device for switching equipment that detects abnormalities.
従来、この種電力用開閉機器において、内部短
絡事故につながる内部異常、たとえば、部分放電
（コロナ）などの発生を検出する部分放電検出用
電極としては、高圧主電極を包むように内蔵した
筒体金属容器を利用することが可能であつた。 Conventionally, in this type of power switchgear, partial discharge detection electrodes used to detect internal abnormalities that could lead to internal short circuits, such as partial discharges (corona), were made using a metal cylindrical body built into the high-voltage main electrode. It was possible to use containers.
しかしながら、このように、金属容器を部分放
電検出用電極として使用するためには、この金属
容器を接地電位と絶縁して据え付けなければなら
ない。このため、通常金属容器と据付基礎鉄鋼と
の間に絶縁物を挿入することになるが、金属容器
の重量が非常に大である上に、上記絶縁物の長期
的機械強度が十分でないこと、さらに、屋外据え
付けなどの場合には、長期に亘つて水分、紫外線
などに曝されることなどとあいまつて、絶縁物に
十分な電気的機械的強度を維持させることは困難
であつた。 However, in order to use the metal container as a partial discharge detection electrode in this manner, the metal container must be installed insulated from the ground potential. For this reason, an insulator is usually inserted between the metal container and the installation foundation steel, but the metal container is extremely heavy and the long-term mechanical strength of the insulator is insufficient. Furthermore, when the insulator is installed outdoors, it is difficult to maintain sufficient electrical and mechanical strength in the insulator due to long-term exposure to moisture, ultraviolet rays, etc.
したがつて、長期間据え付け使用される変電所
現場などの電力用開閉機器において、その金属容
器を部分放電検出用電極として利用することは困
難であり、上記開閉機器の絶縁診断を行い、短絡
大事故につながる内部異常を高信頼度で予知する
ことは困難であつた。 Therefore, it is difficult to use the metal container as an electrode for detecting partial discharge in power switchgear that is installed and used for a long period of time, such as at substation sites. It has been difficult to reliably predict internal abnormalities that may lead to accidents.
この発明は、上記従来の欠点を除去するために
なされたもので、金属容器と据付基礎鉄鋼との間
に絶縁物を挿入することなく、金属容器を接地し
た状態とし、金属容器の接地線にリング状の鉄心
を取り付けることにより、接地線のインダクタン
スが増大することを利用して部分放電を検出する
ようにして、筒体金属容器を絶縁して取り付けす
る必要がなく、かつ外部雑音に影響されにくい開
閉機器の故障予知装置を提供することを目的とす
る。 This invention was made in order to eliminate the above-mentioned conventional drawbacks, and the metal container is grounded without inserting an insulator between the metal container and the installation foundation steel, and the ground wire of the metal container is connected to the ground wire of the metal container. By installing a ring-shaped iron core, partial discharge can be detected by utilizing the increased inductance of the grounding wire, eliminating the need to insulate the cylindrical metal container and making it less susceptible to external noise. The purpose of the present invention is to provide a failure prediction device for switching equipment that is difficult to use.
以下、この発明の開閉機器の故障予知装置の実
施例について図面に基づき説明する。第１図はそ
の一実施例を示す断面図である。この第１図にお
ける１は筒体金属容器であり、複数個長手方向に
連結され、この筒体金属容器１のそれぞれの内部
にはSF6ガスなどの絶縁媒体２が充填されてい
る。この絶縁媒体２に接触されるように、主電極
３が筒体金属容器１内に収納されている。そし
て、筒体金属容器１内において、主電極３はこの
筒体金属容器１と同軸状になるように、所定の間
隔をもつて複数個の支持用絶縁物４により支持さ
れている。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the failure prediction device for switching equipment according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing one embodiment. Reference numeral 1 in FIG. 1 denotes a cylindrical metal container. A plurality of cylindrical metal containers 1 are connected in the longitudinal direction, and each of the cylindrical metal containers 1 is filled with an insulating medium 2 such as SF 6 gas. A main electrode 3 is housed in a cylindrical metal container 1 so as to be in contact with this insulating medium 2 . Inside the cylindrical metal container 1, the main electrode 3 is supported by a plurality of supporting insulators 4 at predetermined intervals so as to be coaxial with the cylindrical metal container 1.
筒体金属容器１の外側には接地線５の一端が接
続されており、この接地線５はドーナツ状の鉄心
６を通して大地８に接続されている。この接地線
にはコロナ検出器７が接続されており、コロナ検
出器７は大地８に接続されている。接地線５、鉄
心６、コロナ検出器７は各筒体金属容器１ごとに
設けられている。 One end of a grounding wire 5 is connected to the outside of the cylindrical metal container 1, and this grounding wire 5 is connected to the earth 8 through a doughnut-shaped iron core 6. A corona detector 7 is connected to this ground wire, and the corona detector 7 is connected to the earth 8. A grounding wire 5, an iron core 6, and a corona detector 7 are provided for each cylindrical metal container 1.
次に、以上のように構成されたこの発明の開閉
機器の故障予知装置の動作について説明する。主
電極３と筒体金属容器１との間にコロナなどの内
部異常が生じた場合、そのコロナ電流は主電極３
より絶縁媒体２の浮遊容量および支持用絶縁物４
の主電極３と筒体金属容器１との間の容量の２種
の容量を介して筒体金属容器１に流れ、筒体金属
容器１より接地線５を通して大地に流れる。 Next, the operation of the failure prediction device for switching equipment of the present invention configured as described above will be explained. If an internal abnormality such as corona occurs between the main electrode 3 and the cylindrical metal container 1, the corona current will be transferred to the main electrode 3.
Stray capacitance of insulating medium 2 and supporting insulator 4
It flows into the cylindrical metal container 1 through two kinds of capacitances, that is, the capacitance between the main electrode 3 and the cylindrical metal container 1, and flows from the cylindrical metal container 1 to the ground through the grounding wire 5.
また、上述のコロナ電流はパルス電流であり、
そのパルスの立上り時間は数10ナノセカンドであ
るため、誘導性インピーダンス（インダクタン
ス）により容易に検出できる。第１図において、
接地線５のみのインダクタンスは極めて小さい
が、図のように、接地線５は鉄心６の中心を貫通
するようにしており、したがつて、接地線５の磁
気抵抗は小さくなり、インダクタンスを増大させ
ることができる。 In addition, the above-mentioned corona current is a pulse current,
Since the pulse rise time is several tens of nanoseconds, it can be easily detected by inductive impedance. In Figure 1,
The inductance of the grounding wire 5 alone is extremely small, but as shown in the figure, the grounding wire 5 passes through the center of the iron core 6, so the magnetic resistance of the grounding wire 5 becomes small and the inductance increases. be able to.
したがつて、接地線５に鉄心６を設けることに
よつて、筒体金属容器１を大地８から絶縁物を介
して浮かせることなく、接地線５をコロナ検出用
電極として使用することができる。 Therefore, by providing the iron core 6 on the grounding wire 5, the grounding wire 5 can be used as a corona detection electrode without floating the cylindrical metal container 1 from the ground 8 via an insulator.
以上のような接地線５に付随した鉄心６および
コロナ検出器７を複数からなる筒体金属容器１の
それぞれに配設し、それぞれのコロナ検出器７の
出力を集中管理することにより、内部異常個所を
検知することができ、内部短絡大事故を予知し、
未然に防止することができる。 By disposing the iron core 6 and corona detector 7 attached to the grounding wire 5 as described above in each of the plurality of cylindrical metal containers 1, and centrally controlling the output of each corona detector 7, internal abnormalities can be detected. It is possible to detect the location and predict a major internal short circuit accident.
This can be prevented.
第２図はこの発明の開閉機器の故障予知装置の
他の実施例を示す断面図であり、第１図と同一部
分には同一符号を付してその説明を省略し、第１
図とは異なる部分を重点的に述べることにする。
この第２図の実施例では、隣り合う筒体金属容器
１の接地線５間にコロナ検出器７を設け、両接地
線５間の電位差を検出するようにしてもよい。こ
のようにすることにより、変電所現場などにおけ
る外部雑音を低減することができ、故障予知装置
の信頼性をさらに高めることができる。 FIG. 2 is a sectional view showing another embodiment of the failure prediction device for switching equipment according to the present invention, and the same parts as in FIG.
I will focus on the parts that differ from the diagram.
In the embodiment shown in FIG. 2, a corona detector 7 may be provided between the ground wires 5 of adjacent cylindrical metal containers 1 to detect the potential difference between both ground wires 5. By doing so, it is possible to reduce external noise at a substation site, etc., and further improve the reliability of the failure prediction device.
以上のように、この発明の開閉機器の故障予知
装置によれば、複数個連結した筒体金属容器のそ
れぞれに接地線を接続し、この接地線を鉄心を通
して接地するようにし、接地線に流れるコロナ電
流などの異常電流を検出器で検出するようにした
ので、筒体金属容器を接地電位から浮させるため
の絶縁取付けが不要となるとともに、外部雑音を
拾いにくいなどの効果を奏するものである。 As described above, according to the failure prediction device for switching equipment of the present invention, a grounding wire is connected to each of a plurality of connected cylindrical metal containers, and this grounding wire is grounded through an iron core. Since abnormal currents such as corona currents are detected by a detector, there is no need to install insulation to keep the cylindrical metal container above ground potential, and it also has the effect of being less likely to pick up external noise. .
第１図はこの発明の開閉機器の故障予知装置の
一実施例の構成を示す断面図、第２図はこの発明
の開閉機器の故障予知装置の他の実施例を示す断
面図である。
１……筒体金属容器、２……絶縁媒体、３……
主電極、４……支持用絶縁物、５……接地線、６
……鉄心、７……コロナ検出器、８……大地。な
お、図中同一符号は同一部分または相当部分を示
す。
FIG. 1 is a sectional view showing the structure of one embodiment of the failure prediction device for switching equipment according to the present invention, and FIG. 2 is a sectional view showing another embodiment of the failure prediction device for switching equipment according to the invention. 1... Cylindrical metal container, 2... Insulating medium, 3...
Main electrode, 4...Supporting insulator, 5...Grounding wire, 6
...Iron core, 7...Corona detector, 8...Earth. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
連結された筒体金属容器、この筒体金属容器内に
それぞれ支持用絶縁物を介してほぼ軸心方向に支
持された主電極、この主電極と上記筒体金属容器
間に生ずる異常放電による電流を流すために大地
と各筒体金属容器間に接続された接地線、この接
地線のそれぞれを周回し各接地線のインダクタン
スを増大させるための鉄心、上記筒体金属容器と
主電極間に生ずる異常放電による電流を上記接地
線より検出する検出器を備えてなる開閉機器の故
障予知装置。 ２ 検出器は各接地線と大地間に接続され各筒体
金属容器と主電極間でこの異常放電を検出するこ
とを特徴とする特許請求の範囲第１項記載の開閉
機器の故障予知装置。 ３ 検出器は隣接する接地線間に接続されてこの
隣接する接地線間の電位差を検出することにより
筒体金属容器と主電極間の異常放電を検出するこ
とを特徴とする特許請求の範囲第１項記載の開閉
機器の故障予知装置。[Scope of Claims] 1. A cylindrical metal container filled with an insulating medium and connected in the axial direction, each of which is supported substantially in the axial direction via a supporting insulator. A main electrode, a grounding wire connected between the earth and each cylindrical metal container in order to flow current due to abnormal discharge occurring between this main electrode and the cylindrical metal container, and each grounding wire going around each of the grounding wires. A failure prediction device for switching equipment, comprising: an iron core for increasing the inductance of the cylindrical metal container; and a detector for detecting current due to an abnormal discharge occurring between the cylindrical metal container and the main electrode from the ground wire. 2. The failure prediction device for switching equipment according to claim 1, wherein the detector is connected between each grounding wire and the earth to detect this abnormal discharge between each cylindrical metal container and the main electrode. 3. Claim No. 3 characterized in that the detector is connected between adjacent ground wires and detects an abnormal discharge between the cylindrical metal container and the main electrode by detecting the potential difference between the adjacent ground wires. A failure prediction device for a switching device according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4779079A JPS55139025A (en) | 1979-04-17 | 1979-04-17 | Switching device trouble prenotifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4779079A JPS55139025A (en) | 1979-04-17 | 1979-04-17 | Switching device trouble prenotifying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55139025A JPS55139025A (en) | 1980-10-30 |
| JPS6111522B2 true JPS6111522B2 (en) | 1986-04-03 |
Family
ID=12785161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4779079A Granted JPS55139025A (en) | 1979-04-17 | 1979-04-17 | Switching device trouble prenotifying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55139025A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58193711U (en) * | 1982-06-10 | 1983-12-23 | 関西電力株式会社 | Potential detection device for internal bus bar of gas insulated switchgear |
| JPS593708U (en) * | 1982-06-28 | 1984-01-11 | 関西電力株式会社 | Phase-to-phase surge voltage detection device |
| JPS61223567A (en) * | 1985-03-29 | 1986-10-04 | Toshiba Corp | Fault detector for gas insulated equipment |
| JP6588781B2 (en) * | 2015-09-17 | 2019-10-09 | 株式会社東芝 | Partial discharge detection device and detection method thereof |
| JP6878538B2 (en) * | 2019-09-13 | 2021-05-26 | 株式会社東芝 | Partial discharge detector and its detection method |
-
1979
- 1979-04-17 JP JP4779079A patent/JPS55139025A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55139025A (en) | 1980-10-30 |
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