JPH0677037B2 - Measuring method of main circuit resistance - Google Patents
Measuring method of main circuit resistanceInfo
- Publication number
- JPH0677037B2 JPH0677037B2 JP62081025A JP8102587A JPH0677037B2 JP H0677037 B2 JPH0677037 B2 JP H0677037B2 JP 62081025 A JP62081025 A JP 62081025A JP 8102587 A JP8102587 A JP 8102587A JP H0677037 B2 JPH0677037 B2 JP H0677037B2
- Authority
- JP
- Japan
- Prior art keywords
- main circuit
- resistance
- conductor
- circuit resistance
- ground
- 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
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Description
【発明の詳細な説明】 「産業上の利用分野」 本発明は変電所で使用されるガス絶縁開閉装置の主回路
抵抗の測定方法に関するものである。The present invention relates to a method for measuring a main circuit resistance of a gas insulated switchgear used in a substation.
「従来の技術」 近年、SF6などの絶縁媒体を封入したガス絶縁開閉装置
が多用されるようになってきた。このガス絶縁開閉装置
は容器を密封してあるため、内部を容易に点検出来ない
という欠点がある。“Prior Art” In recent years, gas-insulated switchgear enclosing an insulating medium such as SF6 has been widely used. This gas-insulated switchgear has a drawback that the inside cannot be easily inspected because the container is sealed.
このため、容器内に収納した接地装置を用いて主回路抵
抗を測定し、内部の異常を検知する方法が用いられてい
る。For this reason, a method of measuring the main circuit resistance using a grounding device housed in a container and detecting an internal abnormality is used.
第３図は、従来の主回路抵抗を測定する方法の一例を示
すもので、ガス絶縁開閉装置13の容器１内には絶縁媒体
1aが封入されるとともに、遮断器10、断路器２、接地装
置３、3a、高圧導体11などが収納されて主回路が構成さ
れている。また12は避雷器、14はケーブルヘッドであ
る。FIG. 3 shows an example of a conventional method for measuring the main circuit resistance. In the container 1 of the gas insulated switchgear 13, an insulating medium is provided.
The main circuit is constructed by accommodating the circuit breaker 10, the disconnector 2, the grounding devices 3, 3a, the high-voltage conductor 11 and the like while the 1a is enclosed. 12 is a lightning arrester and 14 is a cable head.
接地装置３、3aは主回路の接地の目的の他に、主回路抵
抗の測定を実施できるように、接地側電極４、4aが容器
１から絶縁板５、5aにより絶縁支持されるとともに、絶
縁媒体1aを封止可能でかつ容器１に絶縁して取付けられ
た密封端子６、6aに接続されることにより接地回路がそ
れぞれ容器１の外部に引出されている。In addition to the purpose of grounding the main circuit, the grounding devices 3 and 3a are insulated and supported by the insulating plates 5 and 5a from the container 1 so that the ground side electrodes 4 and 4a are insulated and supported so that the main circuit resistance can be measured. Grounding circuits are drawn out of the container 1 by being connected to the sealed terminals 6 and 6a which can seal the medium 1a and are attached to the container 1 in an insulated manner.
このような構造において、常時は密封端子６、6aは接地
線７、7aにより大地Ｅと接続されて接地回路が構成され
ているが、主回路抵抗を測定する場合、第４図に示すよ
うにまず接地装置３、3aを投入し、密封端子６の接地線
７を外し、直流電源装置８を密封端子６に接続し、ここ
から電流Ｉを接地装置3aに向って流す。このとき、密封
端子６と6a間の電位差Ｖを測定することにより、ｒ＝V/
Iの関係から主回路抵抗ｒを測定することができる。In such a structure, the sealed terminals 6 and 6a are normally connected to the ground E by the ground wires 7 and 7a to form a ground circuit. However, when measuring the main circuit resistance, as shown in FIG. First, the grounding devices 3 and 3a are turned on, the ground wire 7 of the sealed terminal 6 is removed, the DC power supply device 8 is connected to the sealed terminal 6, and a current I is flown from there to the grounding device 3a. At this time, by measuring the potential difference V between the sealed terminals 6 and 6a, r = V /
The main circuit resistance r can be measured from the relationship of I.
「発明が解決しようとする問題点」 このような従来の方法では主回路抵抗側にあたって、上
記の如く接地線７を取外すこと、即ち接地回路の一部を
開放する必要が生ずる。このとき万一送電線路に雷サー
ジ、開閉サージ等が侵入した場合には、主回路抵抗の測
定作業者にこのサージが直撃することになり、非常に危
険であった。[Problems to be Solved by the Invention] In such a conventional method, it is necessary to remove the ground wire 7 as described above, that is, to open a part of the ground circuit on the main circuit resistance side. Should a lightning surge, a switching surge, or the like enter the transmission line at this time, the surge would be directly hit by a worker who measures the main circuit resistance, which was extremely dangerous.
「問題点を解決するための手段」 従来は接地回路の一部を開放し、直列に直流電源を挿入
し、電流を流して電圧降下を測定して、主回路抵抗の測
定を実施していたが、本発明は主回路抵抗に並列に抵抗
を有する導体を接続すれば接地回路は開放することなく
主回路抵抗が測定（計算）できる事に着目し、接地装置
を開閉することにより抵抗を有する導体を主回路に並列
に接続まは開放し、接続・開放の各状態における抵抗値
を測定し、その両者の差異により主回路の抵抗をもとめ
る。"Means for solving problems" Conventionally, a part of the ground circuit was opened, a DC power supply was inserted in series, a current was passed to measure the voltage drop, and the main circuit resistance was measured. However, the present invention focuses on the fact that the main circuit resistance can be measured (calculated) without opening the ground circuit if the conductor having the resistance is connected in parallel to the main circuit resistance, and the resistance is provided by opening and closing the grounding device. Connect or open the conductor in parallel to the main circuit, measure the resistance value in each state of connection and open, and determine the resistance of the main circuit by the difference between the two.
「実施例」 本発明の実施例を示す第１図は開閉器を容器に一括収納
した例であり、第２図は、開閉器を各々の容器に収納し
組合わせることにより構成した例である。なお、従来技
術と同一部分については同一番号を付し、重複する説明
を省略する。接地装置３、3aは容器１から絶縁支持され
ており、密封端子６、6aによって接地回路が外部に引出
されている。密封端子６、6a間には抵抗を有する導体20
が接続されており、その一端は接地線７により大地Ｅに
接続されている。このような構造において、第１−ａ図
に示すように接地装置３、3aを開放状態とし、密封端子
６、6a間に直流電源装置８を接続して電流Ｉを流入す
る。"Embodiment" FIG. 1 showing an embodiment of the present invention is an example in which switches are housed in a container at a time, and FIG. 2 is an example constructed by housing switches in respective containers and combining them. . The same parts as those of the conventional technique are designated by the same reference numerals, and a duplicate description will be omitted. The grounding devices 3 and 3a are insulated and supported from the container 1, and the grounding circuit is drawn to the outside by the sealed terminals 6 and 6a. Conductor 20 having resistance between the sealed terminals 6 and 6a
Are connected, and one end thereof is connected to the ground E by a ground wire 7. In such a structure, as shown in FIG. 1-a, the grounding devices 3 and 3a are opened, the DC power supply device 8 is connected between the sealed terminals 6 and 6a, and the current I flows in.
そのときの密封端子６と6a間の電圧降下をV1とすれば、
導体20の抵抗Ｒは Ｒ＝V1/Iから測定できる。If the voltage drop between the sealed terminals 6 and 6a at that time is V 1 ,
The resistance R of the conductor 20 can be measured from R = V 1 / I.
然るのちに第１−ｂ図のように接地装置３、3aを投入
し、前記と同様に電流Ｉを流入する。このときの密封端
子６と6a間の電圧降下をV2とすれば、主回路抵抗ｒと導
体20の抵抗Ｒとの合成抵抗Ｒ′は Ｒ′＝V2/Iから測定できる。After that, the grounding devices 3 and 3a are turned on as shown in FIG. 1-b, and the current I flows in as in the above. If the voltage drop between the sealed terminals 6 and 6a at this time is V 2 , the combined resistance R'of the main circuit resistance r and the resistance R of the conductor 20 can be measured from R '= V 2 / I.
一方、主回路抵抗ｒは の関係にあるので、上記の如く測定した導体20の抵抗Ｒ
及び合成抵抗Ｒ′の値より主回路抵抗ｒをもとめること
が可能となる。On the other hand, the main circuit resistance r is Therefore, the resistance R of the conductor 20 measured as described above is
It is possible to obtain the main circuit resistance r from the value of the combined resistance R ′.
このように主回路抵抗測定中でも、接地回路を開放する
事がないので、安全に測定を実施する事ができる。In this way, even during the main circuit resistance measurement, the ground circuit is not opened, so that the measurement can be performed safely.
「発明の効果」 以上説明したように本発明によれば、接地装置の接地回
路を開放する事なくガス絶縁開閉装置の主回路抵抗を測
定する事ができるので、万一送電線路に雷サージ、開閉
サージ等が侵入した場合でも、安全にその作業を実施す
ることができる。As described above, according to the present invention, the main circuit resistance of the gas insulated switchgear can be measured without opening the ground circuit of the grounding device. Even if a switching surge or the like enters, the work can be safely performed.
第１図、第２図は本発明のガス絶縁開閉装置を示す図、 第１−ａ図は導体の抵抗測定状況を、第１−ｂ図は合成
抵抗の測定状況を示す図、 第３図は従来のガス絶縁開閉装置を、 第４図は従来技術による主回路抵抗の測定状況をそれぞ
れ示す図である。 図において １は容器 1aは絶縁媒体 ３、3aは接地装置 ６、6aは密封端子 13はガス絶縁開閉装置 20は抵抗を有する導体 である。1 and 2 are views showing a gas-insulated switchgear of the present invention, FIG. 1-a is a conductor resistance measurement situation, FIG. 1-b is a composite resistance measurement situation, and FIG. Is a conventional gas-insulated switchgear, and FIG. 4 is a diagram showing the measurement status of the main circuit resistance according to the prior art. In the figure, 1 is a container 1a is an insulating medium 3, 3a is a grounding device 6, 6a is a sealed terminal 13 is a gas insulated switchgear 20 is a conductor having a resistance.
Claims (1)
２台以上の接地装置が収納されて主回路が構成されたガ
ス絶縁開閉装置の主回路測定方法において、 前記接地装置の接地側電極を前記容器に対して絶縁し、 これらの接地側電極間を、抵抗を有する導体により接続
するとともに、一方の接地側電極を接地し、 前記接地装置を開放した状態で、前記接地側電極間に直
流電流を流入して、前記導体の抵抗値を測定し、 前記接地装置を投入した状態で、前記接地側電極間に直
流電流を流入して、前記導体と前記主回路との合成抵抗
値を測定し、 前記導体の抵抗値と前記合成抵抗値とから、前記主回路
の抵抗値を求める、 ことを特徴とする主回路抵抗の測定方法。1. A method for measuring a main circuit of a gas insulated switchgear in which at least two or more grounding devices are housed in a container in which an insulating medium is enclosed to form a main circuit. Insulate with respect to the container, and connect these ground side electrodes with a conductor having resistance, ground one of the ground side electrodes, and leave the grounding device open. A current is flown in to measure the resistance value of the conductor, and in the state where the grounding device is turned on, a DC current is flown between the ground side electrodes to measure the combined resistance value of the conductor and the main circuit. Then, the resistance value of the main circuit is obtained from the resistance value of the conductor and the combined resistance value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62081025A JPH0677037B2 (en) | 1987-04-03 | 1987-04-03 | Measuring method of main circuit resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62081025A JPH0677037B2 (en) | 1987-04-03 | 1987-04-03 | Measuring method of main circuit resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63247670A JPS63247670A (en) | 1988-10-14 |
| JPH0677037B2 true JPH0677037B2 (en) | 1994-09-28 |
Family
ID=13734935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62081025A Expired - Lifetime JPH0677037B2 (en) | 1987-04-03 | 1987-04-03 | Measuring method of main circuit resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0677037B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60158162U (en) * | 1984-03-30 | 1985-10-21 | 横河電機株式会社 | resistance measuring device |
-
1987
- 1987-04-03 JP JP62081025A patent/JPH0677037B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63247670A (en) | 1988-10-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070928 Year of fee payment: 13 |