JPH0787670B2 - Gas pressure abnormality detection device for gas insulation equipment - Google Patents
Gas pressure abnormality detection device for gas insulation equipmentInfo
- Publication number
- JPH0787670B2 JPH0787670B2 JP1015956A JP1595689A JPH0787670B2 JP H0787670 B2 JPH0787670 B2 JP H0787670B2 JP 1015956 A JP1015956 A JP 1015956A JP 1595689 A JP1595689 A JP 1595689A JP H0787670 B2 JPH0787670 B2 JP H0787670B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- gas
- detected
- gas pressure
- container
- 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 - Fee Related
Links
Landscapes
- Gas-Insulated Switchgears (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、ガス絶縁機器において、内部閃絡により生
ずるガス圧力の異常を検出するガス絶縁機器のガス圧力
異常検出装置に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas pressure abnormality detecting device for gas insulating equipment, which detects abnormality in gas pressure caused by an internal flash.
〔従来の技術〕 第３図は、例えば三菱電機技報第53巻10号（1979年）第
771頁の図10に示された従来のガス圧力異常上昇検出装
置である。図において、（１）は接地された第１の容器
で、２〜５気圧に加圧されたガスが封入されている。
（２）は第１の容器（１）に配置された導体等の充電部
材、（３）は充電部材（２）を支持した絶縁体である。
なお、（１）〜（３）でガス絶縁機器（４）を構成して
いる。[Prior Art] FIG. 3 shows, for example, Mitsubishi Electric Technical Report Vol. 53, No. 10 (1979)
It is the conventional gas pressure abnormal rise detection device shown in FIG. 10 on page 771. In the figure, (1) is a grounded first container in which a gas pressurized to 2 to 5 atmospheres is enclosed.
(2) is a charging member such as a conductor arranged in the first container (1), and (3) is an insulator supporting the charging member (2).
The gas insulation device (4) is composed of (1) to (3).
（５）は第１の容器（１）と直結された第２の容器、
（６）は第２の容器（５）を仕切つたベローズ、（７）
は両容器（１）（５）間を連通した小孔である。したが
つて、常時は第２の容器（５）内も第１の容器（１）内
と同じガスが充填されている。（８）はベローズ（６）
の先端に設けられたスイツチ、（９）はスイツチ（８）
の出力端子で、監視装置（図示せず）に接続されてい
る。(5) is a second container directly connected to the first container (1),
(6) is a bellows partitioning the second container (5), (7)
Is a small hole communicating between both containers (1) and (5). Therefore, the second container (5) is always filled with the same gas as that in the first container (1). (8) is a bellows (6)
A switch provided at the tip of the switch, (9) is a switch (8)
Is connected to a monitoring device (not shown).
次にこれらの動作について説明する。今、ガス絶縁機器
（４）の充電部材（２）から容器（１）へＡで示すよう
なアークによる閃絡事故が生じたとすれば、ガス絶縁機
器（４）内のガスの圧力がアークの熱による膨脹などの
ため衝撃的に上昇する。その圧力はベローズ（６）内に
達するが、容器（５）内のガスは小孔（７）を通じて圧
力が上昇するので、地絡アークの継続する0.05〜0.1秒
というような短時間では殆んど変化が無い。したがつ
て、これらの間のガス圧力の差によりベローズ（６）が
伸びてスイツチ（８）が入り、端子（13）から異常圧力
の生じたことを示す信号を監視装置に伝える。Next, these operations will be described. Now, if a flashover accident due to an arc as indicated by A occurs from the charging member (2) of the gas insulation device (4) to the container (1), the pressure of the gas in the gas insulation device (4) is It rises shockly due to expansion due to heat. Although the pressure reaches the bellows (6), the gas in the container (5) rises in pressure through the small holes (7). There is no change. Therefore, due to the difference in gas pressure between them, the bellows (6) expands and the switch (8) enters, and a signal indicating that an abnormal pressure has occurred is transmitted from the terminal (13) to the monitoring device.
従来のガス圧力異常上昇検出装置は以上のように構成さ
れていたので、ガス絶縁機器の容器にかなり大きな孔を
明け相当大きな検出器を備える必要があり、取付部の確
保のためのガス絶縁機器の配置・構成に考慮を要すると
ともに、これらの検出器取付けの不備によるガス漏れ故
障や機構部が多く摩耗や摩擦によるトラブルの発生する
恐れが大きかつた。Since the conventional gas pressure abnormal rise detection device is configured as described above, it is necessary to make a considerably large hole in the container of the gas insulation device and provide a considerably large detector. In addition to the need to consider the arrangement and configuration, there was a large risk of gas leak failure due to improper mounting of these detectors and troubles due to wear and friction on many mechanical parts.
この発明は上記のような問題点を解消するためになされ
たもので、測定された圧力を基に演算する装置を設ける
ことにより、ガス絶縁機器容器には小さな圧力センサを
取付けるだけで済み、ガス絶縁機器への取付けが容易な
ガス圧力異常検出装置を提供することを目的とする。The present invention has been made to solve the above problems, and by providing a device that calculates based on the measured pressure, it is only necessary to attach a small pressure sensor to the gas-insulated equipment container. An object of the present invention is to provide a gas pressure abnormality detection device that can be easily attached to an insulating device.
この発明に係るガス絶縁機器のガス圧力異常検出装置
は、圧力センサにより、ガス絶縁機器内のガス圧力の連
続測定が行われるが、測定時点のガス圧力から短い時間
さかのぼつた時点のガス圧力を差引いた差圧を求め、こ
れが一定値を越えた時、異常の信号を出す演算回路を備
えたものである。The gas pressure abnormality detecting device for a gas insulation device according to the present invention continuously measures the gas pressure in the gas insulation device by the pressure sensor, but subtracts the gas pressure at the time point traced back for a short time from the gas pressure at the measurement time point. The differential pressure is calculated, and when it exceeds a certain value, an arithmetic circuit for outputting an abnormal signal is provided.
この発明におけるガス絶縁機器のガス圧力異常検出装置
では、ガス絶縁機器の内部で閃絡によるアークにより圧
力上昇が起ると、測定時点のガス圧力はアーク継続時間
と電流の大きさに応じ上昇するのに対し、閃絡発生時よ
り短時間前のガス圧は定常状態のガス圧とほとんど等し
いと見てよいので、それらの間の差圧を求めれば、異常
な圧力上昇を検出することができる。In the gas pressure abnormality detecting device for gas insulation equipment according to the present invention, when the pressure rises due to the arc caused by the flashing inside the gas insulation equipment, the gas pressure at the time of measurement rises according to the arc duration and the magnitude of the current. On the other hand, since it can be considered that the gas pressure shortly before the occurrence of the flashover is almost equal to the gas pressure in the steady state, an abnormal pressure rise can be detected by obtaining the differential pressure between them. .
以下、この発明の一実施例を図について説明する。第１
図において、（１）〜（４）は従来のものと同様であ
る。（10）は容器（１）内に設けられた圧力センサで、
絶縁ガスの圧力を測定するもので、圧電型や歪検出型な
ど小形で感度のよいものが最近作られている。（11）は
遅延回路で、圧力センサ（10）で検出した第１の検出圧
力の値を所定の時間遅らせて出力する。（12）は演算回
路で、遅延回路（11）が第１の検出圧力を出力する時点
に圧力センサ（10）が検出した第２の検出圧力と、遅延
回路（11）から出力された第１の検出圧力との差圧を演
算し、差圧が所定の値を越えると信号を出す。（13）は
温度センサであり、熱電対やサーミスタなど小形で精度
のよいものが入手できるので、感温部が絶縁ガスの温度
を示すように容器（１）内に取付けられる。（14）は演
算部で、温度センサ（13）及び圧力センサ（10）と接続
されている。An embodiment of the present invention will be described below with reference to the drawings. First
In the figure, (1) to (4) are the same as the conventional one. (10) is a pressure sensor provided in the container (1),
For measuring the pressure of insulating gas, small and sensitive ones such as piezoelectric type and strain detection type have been recently made. Reference numeral (11) is a delay circuit, which delays the value of the first detected pressure detected by the pressure sensor (10) for a predetermined time and outputs it. (12) is an arithmetic circuit, which is the second detected pressure detected by the pressure sensor (10) at the time when the delay circuit (11) outputs the first detected pressure, and the first output output from the delay circuit (11). The pressure difference with the detected pressure is calculated, and a signal is output when the pressure difference exceeds a predetermined value. (13) is a temperature sensor, and a small and highly accurate one such as a thermocouple or a thermistor is available. Therefore, the temperature sensing part is mounted in the container (1) so as to indicate the temperature of the insulating gas. A calculation unit (14) is connected to the temperature sensor (13) and the pressure sensor (10).
これらの動作は次のようになる。今、ガス絶縁機器
（４）の充電部材（２）から、容器（１）へＡで示すよ
うなアークによる地絡事故が発生したとすれば、ガス絶
縁機器（４）内のガスの圧力がアークの熱による膨脹な
どのため衝撃的に上昇する。地絡事故は関連する保護継
電器や遮断器（図示されていない）により通常0.05秒〜
0.1秒で遮断されて取除かれるので、地絡部でのガス圧
は第２図に示されるようにtaのアークの続く間急激に上
昇する。この地絡点のガス圧力の上昇は、地絡時の電流
や地絡場所からの圧力の伝播する面の大きさなどにより
異なる。その圧力は音速で伝わり、圧力センサ（10）の
部分に達した時には反射や減衰などで波形もくずれる
が、ほぼ第２図に示すような圧力上昇が現われる。この
発明の装置では、ガス圧力を圧力センサーで測定し、第
２の検出圧力は即刻演算回路（12）へ測定値を送り、第
１の検出圧力は遅延回路に入れ、例えばt1＝10秒遅らせ
て、10秒前のガス圧力値を演算回路（12）へ送りこむ。
数秒から数分のオーダの短時間t1では、絶縁ガスの温度
変化による圧力変動もなく、ガス漏れも急激に生じるこ
とはまず無いので、遅延回路（11）から得られるガス圧
力は、正常である場合のガス圧力と考えてよい。These operations are as follows. Now, if a ground fault accident due to an arc as indicated by A occurs from the charging member (2) of the gas insulation device (4) to the container (1), the pressure of the gas in the gas insulation device (4) is It rises shockly due to expansion due to the heat of the arc. A ground fault is usually 0.05 seconds ~ due to the associated protective relays and circuit breakers (not shown).
The gas pressure at the ground fault rises sharply for the duration of the arc of t a as shown in FIG. 2 because it is shut off and removed in 0.1 second. The increase in the gas pressure at the ground fault depends on the current at the time of the ground fault and the size of the surface where the pressure from the ground fault propagates. The pressure is transmitted at the speed of sound, and when it reaches the pressure sensor (10), the waveform is distorted due to reflection and attenuation, but the pressure rise as shown in FIG. 2 appears. In the device of the present invention, the gas pressure is measured by the pressure sensor, the second detected pressure is immediately sent to the calculation circuit (12), and the first detected pressure is put in the delay circuit, for example, t 1 = 10 seconds. Delay and send the gas pressure value 10 seconds before to the arithmetic circuit (12).
In a short time t 1 of the order of several seconds to several minutes, there is no pressure fluctuation due to the temperature change of the insulating gas, and gas leakage is unlikely to occur suddenly, so the gas pressure obtained from the delay circuit (11) is normal. It can be thought of as the gas pressure in some cases.
演算回路（12）ではこの差圧を求めるので、衝撃的な圧
力上昇分のみ取り出すことができ、この値が誤差と区別
できる一定値を越えれば、ガス圧力異常の信号を出す。
これは監視盤（図示していない）などへ伝えられるが、
電気信号から光信号などに変換して送つてもよい。Since the arithmetic circuit (12) obtains this differential pressure, only a shocking pressure increase can be taken out, and if this value exceeds a certain value that can be distinguished from an error, a gas pressure abnormal signal is output.
This is transmitted to a monitoring board (not shown) etc.,
It may be converted from an electric signal to an optical signal and sent.
さらに、温度センサ（13）を追加することによつて、ガ
ス漏れの検出も可能である。即ち、封じ切られた一定量
のガスの温度と圧力とがボイルシヤールの法則に従うの
で、ガス圧力はガス温度に比例する。したがつて、基準
温度におけるガス圧力を演算回路（14）に記憶してお
き、温度センサ（13）で検出された検出温度における圧
力センサ（10）の検出圧力を、演算回路（14）の換算手
段で基準温度での圧力に換算し、換算圧力が所定の圧力
以下になつたとき信号を出すようにする。例えば、演算
回路（14）に記憶している圧力との差が0.5気圧以上に
なつたら信号を出すように演算回路の出力手段を調整す
る。Furthermore, by adding a temperature sensor (13), it is possible to detect gas leakage. That is, since the temperature and pressure of a fixed amount of gas that has been sealed off complies with Boyle-Schiar's law, the gas pressure is proportional to the gas temperature. Therefore, the gas pressure at the reference temperature is stored in the arithmetic circuit (14), and the pressure detected by the pressure sensor (10) at the detected temperature detected by the temperature sensor (13) is converted by the arithmetic circuit (14). The pressure is converted into the pressure at the reference temperature by means, and a signal is output when the converted pressure falls below a predetermined pressure. For example, the output means of the arithmetic circuit is adjusted so as to output a signal when the difference from the pressure stored in the arithmetic circuit (14) becomes 0.5 atmospheric pressure or more.
この場合、圧力センサ（10）は、ガス圧異常上昇検出用
のものと共用できる。温度センサ（13）は、最近の監視
装置付のガス絶縁機器では、通電による発熱異常を検出
するために設けられることが多いので、これと共用する
こともできるので、少しの部品の追加で、内部閃絡によ
るガス圧異常とガス漏れによるガス圧低下検出の二役を
果し、経済的である。In this case, the pressure sensor (10) can also be used as a sensor for detecting an abnormal rise in gas pressure. Since the temperature sensor (13) is often provided to detect a heat generation abnormality due to energization in a gas-insulated device with a recent monitoring device, it can be shared with the temperature sensor (13). It is economical because it plays two roles of abnormal gas pressure due to internal flashover and detection of gas pressure drop due to gas leakage.
なお、上記説明は単相形の機器に達して行つたが三相一
括形の機器で相間閃絡などによるガス圧上昇も検出でき
る。Although the above description has been given to a single-phase type device, it is also possible to detect an increase in gas pressure due to an interphase flashover or the like in a three-phase batch type device.
以上のように、この発明によれば、小形の圧力センサを
ガス絶縁機器容器に取りつけ、その測定値を処理して、
地絡事故による衝撃圧力上昇を検出する構造としたの
で、取付部からのガス漏れなどのトラブルの生じる恐れ
も小さくなるとともに、経済的なガス圧力監視システム
が構築できる。As described above, according to the present invention, the small pressure sensor is attached to the gas-insulated equipment container, and the measured value is processed,
Since the structure is such that the rise in impact pressure due to a ground fault is detected, the risk of trouble such as gas leakage from the mounting portion is reduced, and an economical gas pressure monitoring system can be constructed.
第１図はこの発明の一実施例を示すガス圧力異常検出装
置の構成図、第２図は内絡事故時のガス圧力の変化を示
す説明図、第３図は従来のガス圧力異常上昇検出装置の
構造図である。 図において、（４）はガス絶縁機器、（10）は圧力セン
サ、（11）は遅延回路、（12）（14）は演算回路、（1
3）は温度センサである。 なお、各図中同一符号は同一又は相当部分を示す。FIG. 1 is a block diagram of a gas pressure abnormality detecting device showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing changes in gas pressure at the time of an internal fault, and FIG. 3 is a conventional gas pressure abnormality increase detection. It is a structural drawing of an apparatus. In the figure, (4) is a gas insulation device, (10) is a pressure sensor, (11) is a delay circuit, (12) and (14) are arithmetic circuits, and (1
3) is a temperature sensor. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
縁ガスの圧力を検出する圧力センサ、この圧力センサが
検出した第１の検出圧力を所定時間遅れて出力する遅延
回路、この遅延回路が上記第１の検出圧力を出力する時
点に上記圧力センサが検出した第２の検出圧力と上記遅
延回路から出力された第１の検出圧力との差圧を演算
し、上記差圧が所定の値を越えると信号を出す演算回路
を備えたガス絶縁機器のガス圧力異常検出装置。1. A pressure sensor for detecting the pressure of an insulating gas mounted in a container of a gas insulating device, a delay circuit for outputting a first detected pressure detected by the pressure sensor with a delay of a predetermined time, and this delay circuit. The differential pressure between the second detected pressure detected by the pressure sensor and the first detected pressure output from the delay circuit at the time of outputting the first detected pressure is calculated, and the differential pressure is a predetermined value. Gas pressure abnormality detection device for gas insulated equipment equipped with an arithmetic circuit that outputs a signal when the temperature exceeds the limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1015956A JPH0787670B2 (en) | 1989-01-25 | 1989-01-25 | Gas pressure abnormality detection device for gas insulation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1015956A JPH0787670B2 (en) | 1989-01-25 | 1989-01-25 | Gas pressure abnormality detection device for gas insulation equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02197210A JPH02197210A (en) | 1990-08-03 |
| JPH0787670B2 true JPH0787670B2 (en) | 1995-09-20 |
Family
ID=11903193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1015956A Expired - Fee Related JPH0787670B2 (en) | 1989-01-25 | 1989-01-25 | Gas pressure abnormality detection device for gas insulation equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0787670B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2853370B2 (en) * | 1990-07-13 | 1999-02-03 | 三菱電機株式会社 | Pressure abnormality detection device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5074744A (en) * | 1973-11-07 | 1975-06-19 | Mitsubishi Electric Corp | Fault detection apparatus for electric equipment |
| JPS614407A (en) * | 1984-06-15 | 1986-01-10 | 株式会社日立製作所 | Gas monitor of gas insulated switching device |
-
1989
- 1989-01-25 JP JP1015956A patent/JPH0787670B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 三菱電機技報、Ｖｏｌ．５３，Ｎｏ．１０，１９７９、Ｐ．７６８〜７７２ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02197210A (en) | 1990-08-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |