JP2536942Y2 - SF ▲ 6 ▼ Partial discharge detection device in gas - Google Patents
SF ▲ 6 ▼ Partial discharge detection device in gasInfo
- Publication number
- JP2536942Y2 JP2536942Y2 JP1990019222U JP1922290U JP2536942Y2 JP 2536942 Y2 JP2536942 Y2 JP 2536942Y2 JP 1990019222 U JP1990019222 U JP 1990019222U JP 1922290 U JP1922290 U JP 1922290U JP 2536942 Y2 JP2536942 Y2 JP 2536942Y2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- ultrasonic
- valve
- sensor
- partial discharge
- 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
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
- Locating Faults (AREA)
- Gas-Insulated Switchgears (AREA)
Description
【考案の詳細な説明】 A.産業上の利用分野 本考案は、ガス絶縁開閉装置（GIS）の予測保全装置
として使用するSF6ガス中部分放電検出装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION A. Industrial Field of the Invention The present invention relates to a partial discharge detection device in SF 6 gas used as a predictive maintenance device of a gas insulated switchgear (GIS).
B.考案の概要 本考案は、超音波によってコロナ放電を検出するSF6
ガス中部分放電検出装置において、 タンクに検出用開口部を設け、ここにガス用バルブを
介して超音波センサを取り付けることにより、 超音波センサをタンク内部に臨ませてコロナ放電に伴
う超音波を適確に検出可能とするとともに、超音波セン
サの交換を容易に行うことができるようにしたものであ
る。B. Outline of the invention The invention is based on SF 6 that detects corona discharge by ultrasonic waves.
In the gas partial discharge detection device, a detection opening is provided in the tank, and an ultrasonic sensor is attached here via a gas valve, so that the ultrasonic sensor faces the inside of the tank and the ultrasonic waves accompanying corona discharge are emitted. The ultrasonic sensor can be accurately detected, and the replacement of the ultrasonic sensor can be easily performed.
C.従来の技術 SF6ガス中の部分放電（コロナ放電）を超音波によっ
て検出する場合は、一般にタンク壁に超音波センサ（AE
センサ）を取り付けている。この場合、センサに検出さ
れる超音波は、ガス中のパーティクルが交流電界により
タンク内にジャンピングしている時、タンクとの衝突に
より生じる超音波である。C. Conventional technology When detecting partial discharge (corona discharge) in SF 6 gas by ultrasonic waves, an ultrasonic sensor (AE
Sensor). In this case, the ultrasonic wave detected by the sensor is an ultrasonic wave generated by collision with the tank when particles in the gas are jumping into the tank by the AC electric field.
D.考案が解決しようとする課題 このように超音波センサをタンク壁に取り付けた場合
は、風雨がタンク外面に当たった時に生じる超音波がGI
S内のコロナ放電音がタンクに伝わる周波数帯と同じで
あるため、風雨による超音波が大きなノイズとしてセン
サに検出されることになり、風雨によってコロナ検出が
できない時間が発生する。D. Problems to be solved by the invention When the ultrasonic sensor is mounted on the tank wall in this way, the ultrasonic waves generated when the wind and rain hit the outer surface of the tank are GI.
Since the corona discharge sound in S is the same as the frequency band transmitted to the tank, the ultrasonic waves due to the wind and rain will be detected by the sensor as large noise, and the corona cannot be detected due to the wind and rain.
この対策としては、超音波センサをタンク内に設置す
ることが考えられる。その場合、電力機器の電気、機械
ノイズの環境下での超音波センサの寿命、信頼性に未知
な点があるため、電力機器に影響を及ぼすことなく交換
が可能な取り付け状態としたり、校正，動作チェックに
十分な配慮が必要となる。As a countermeasure, it is conceivable to install an ultrasonic sensor in the tank. In such a case, the life and reliability of the ultrasonic sensor in the environment of electrical and mechanical noise of power equipment are unknown, so it is necessary to change the mounting state so that it can be replaced without affecting the power equipment. Careful consideration is required for operation check.
本考案の目的は、超音波センサの交換が容易で、かつ
コロナ放電に伴う超音波を適確に検出することができる
SF6ガス中部分放電検出装置を提供することにある。The purpose of the present invention is to easily replace the ultrasonic sensor and accurately detect the ultrasonic wave accompanying the corona discharge.
An object of the present invention is to provide a partial discharge detection device in SF 6 gas.
E.課題を解決するための手段 本考案は、超音波検出によってコロナ放電を検出する
SF6ガス中部分放電検出装置において、導体を絶縁するS
F6ガスが充填されたタンクに検出用の開口部を形成する
一方、検出面を除いて超音波吸収材で包まれるように超
音波センサを収納筒に収納し、これを前記開口部全体を
開閉するガス用バルブを介して取り付けたことを特徴と
するものである。E. Means to solve the problem The present invention detects corona discharge by ultrasonic detection.
In SF 6 gas partial discharge detection device, S to insulate the conductors
While F 6 gas to form an opening for detecting the tank filled, with the exception of the detection surface accommodating the ultrasonic sensor as wrapped ultrasonically absorbent material containing cylinder, the entire opening this It is characterized in that it is mounted via a gas valve that opens and closes.
F.作用 コロナ放電に伴って発生した超音波は、タンク内を進
行し開口部、バルブを経て超音波センサに達する。受信
信号は信号処理部で処理され、判定される。F. Action The ultrasonic waves generated by the corona discharge travel in the tank, reach the ultrasonic sensor via the opening and the valve. The received signal is processed and determined by the signal processing unit.
センサ交換時には、まずバルブが閉じられる。この
後、筒が外され、内部の超音波センサの交換が行われ
る。そして、再びバルブ端に取り付けられる。交換完了
後、バルブが開かれる。When replacing the sensor, the valve is first closed. Thereafter, the tube is removed, and the internal ultrasonic sensor is replaced. Then, it is attached to the valve end again. After the replacement is completed, the valve is opened.
G.実施例 以下、本考案を図面に示す実施例に基づいて詳細に説
明する。G. Embodiment Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.
第１図は本考案の一実施例を示すもので、１はGISの
タンク、２はこのタンク１内に配設された導体、３はSF
6ガスである。前記タンク１には検出用の開口部1Aを形
成し、その先端にガス用バルブ４の一端を取り付け、バ
ルブ４の他端にセンサ収納筒５を取り付けている。この
筒５の内部に超音波センサ６を収納している。筒５は超
音波吸収材（振動吸収材）で形成するか、あるいは内面
に超音波吸収材を張り付けた構造とし、前記超音波セン
サ６のリード線を気密に引き出している。FIG. 1 shows an embodiment of the present invention, wherein 1 is a GIS tank, 2 is a conductor disposed in this tank 1, and 3 is a SF.
There are 6 gases. An opening 1A for detection is formed in the tank 1, one end of a gas valve 4 is attached to the tip, and a sensor storage tube 5 is attached to the other end of the valve 4. An ultrasonic sensor 6 is housed inside the cylinder 5. The tube 5 is formed of an ultrasonic absorbing material (vibration absorbing material) or has a structure in which an ultrasonic absorbing material is adhered to the inner surface, and the lead wire of the ultrasonic sensor 6 is drawn out in an airtight manner.
７は発信回路、８は受信回路、９は前記バルブ４の開
閉に伴う開閉信号を受け、バルブ閉止時に前記発信回路
７にスタート信号を送り、前記受信回路８の受信信号を
取り入れて超音波センサ６の良否を判別する超音波セン
サ自己診断処理回路、10は超音波信号処理部（コロナ検
出部）、11は前記自己診断処理回路９による診断処理時
に前記超音波信号処理部10へ受信信号が伝送されるのを
阻止するためのスイッチである。Reference numeral 7 denotes a transmitting circuit, 8 denotes a receiving circuit, 9 receives an opening / closing signal accompanying opening / closing of the valve 4, sends a start signal to the transmitting circuit 7 when the valve is closed, takes in the receiving signal of the receiving circuit 8, and receives an ultrasonic sensor. 6 is an ultrasonic sensor self-diagnosis processing circuit for judging pass / fail, 10 is an ultrasonic signal processing section (corona detection section), and 11 is a reception signal to the ultrasonic signal processing section 10 at the time of diagnosis processing by the self-diagnosis processing circuit 9. This is a switch for preventing transmission.
なお、前記ガス用バルブ４は、第２図（開状態）、第
３図（閉状態）に示すように開状態では弁体が開いて直
線的な通路となり、閉状態では弁体により通路が閉じら
れる構造、即ち超音波の導入を妨げない構造のものを用
いる。As shown in FIG. 2 (open state) and FIG. 3 (closed state), the gas valve 4 opens the valve body to form a linear passage, and in the closed state, the passage is formed by the valve body. Use a closed structure, that is, a structure that does not hinder the introduction of ultrasonic waves.
次に、動作について述べる。通常は、バルブ４は開状
態となっており、タンク１内のｘ点でのコロナ放電に伴
って超音波が発生すると、その超音波は開口部1A、バル
ブ４を通って超音波センサ６の検出面に達する。この場
合、管路長が多少長くなっても途中に障害物がなければ
減衰は僅かであり、検出レベル以上の大きさとなる。こ
の超音波の受信信号が受信回路８からスイッチ11を介し
て超音波信号処理部10へ送られ、信号処理によってコロ
ナ放電発生と判定される。Next, the operation will be described. Normally, the valve 4 is in an open state, and when an ultrasonic wave is generated along with the corona discharge at the point x in the tank 1, the ultrasonic wave passes through the opening 1A and the valve 4, and the ultrasonic sensor 6 Reach the detection surface. In this case, even if the length of the pipeline is slightly longer, if there is no obstacle in the middle, the attenuation is small, and the attenuation is larger than the detection level. The reception signal of the ultrasonic wave is sent from the reception circuit 8 to the ultrasonic signal processing unit 10 via the switch 11, and it is determined by signal processing that corona discharge has occurred.
一方、超音波センサ自己診断時には、バルブ４を開状
態から閉状態にする。この開閉信号を受けて自己診断処
理回路９からスタート信号が発信回路７に送られる。同
時に、スイッチ11が開路される。発信回路７にスタート
（トリガー）信号が加わると、一定時間超音波センサ６
が発信用として動作する。この超音波はバルブ４の弁体
で反射し、これがセンサ６によって検出される。この反
射波の受信信号が受信回路８から自己診断処理回路９へ
送られ、反射波の伝搬時間、レベルが測定される。この
測定値が超音波信号処理部10へ送られ、良否判定が行わ
れる。その結果、不良であれば、センサ放電故障警報が
出される。On the other hand, at the time of the ultrasonic sensor self-diagnosis, the valve 4 is changed from the open state to the closed state. In response to the opening / closing signal, a start signal is sent from the self-diagnosis processing circuit 9 to the transmission circuit 7. At the same time, the switch 11 is opened. When a start (trigger) signal is applied to the transmission circuit 7, the ultrasonic sensor 6
Works for outgoing calls. This ultrasonic wave is reflected by the valve element of the valve 4 and is detected by the sensor 6. The received signal of the reflected wave is sent from the receiving circuit 8 to the self-diagnosis processing circuit 9, and the propagation time and level of the reflected wave are measured. The measured value is sent to the ultrasonic signal processing unit 10, and the quality is determined. As a result, if defective, a sensor discharge failure alarm is issued.
センサ交換時にはバルブ４を閉状態とし、筒５を外し
て内部のセンサ６を正常なものと交換した後、筒５をバ
ルブ４に取り付ける。この交換作業は電力機器に影響を
与えることなく実施できる。At the time of sensor replacement, the valve 4 is closed, the cylinder 5 is removed, and the internal sensor 6 is replaced with a normal one. This replacement work can be performed without affecting the power equipment.
H.考案の効果 以上のように本考案によれば、タンクに開口部全体が
開閉するガス用バルブを介して超音波センサが設けられ
た収納筒を取り付けているため、風雨による超音波があ
ってもGISのコロナ放電を適確に検出することができ
る。また、検出部にガス用バルブを設け、その端部にセ
ンサを取り付けたので、超音波センサの交換を電力機器
に影響を与えることなく行うことが可能である。更に、
自己診断処理回路を付設し、バルブ弁体からの反射波を
利用することにより、超音波センサの自己診断を容易に
行うことができるといった利点が生じる。H. Effect of the Invention As described above, according to the present invention, since the storage cylinder provided with the ultrasonic sensor is attached to the tank via the gas valve that opens and closes the entire opening, the ultrasonic waves due to the wind and rain are not affected. Even so, the corona discharge of the GIS can be accurately detected. In addition, since the gas valve is provided in the detection unit and the sensor is attached to the end, the replacement of the ultrasonic sensor can be performed without affecting the power device. Furthermore,
By providing a self-diagnosis processing circuit and utilizing the reflected wave from the valve valve body, there is an advantage that the self-diagnosis of the ultrasonic sensor can be easily performed.
第１図は本考案に係るSF6ガス中部分放電検出装置の一
実施例を示す構成説明図、第２図及び第３図は同実施例
におけるガス用バルブの構造例を示す断面図である。 １……GISのタンク、1A……検出用開口部、２……導
体、３……SF6ガス、４……ガス用バルブ、５……セン
サ収納筒、６……超音波センサ、７……発信回路、８…
…受信回路、９……センサ自己診断処理回路、10……超
音波信号処理部（コロナ検出部）、11……スイッチ。FIG. 1 is a structural explanatory view showing an embodiment of a partial discharge detecting device in SF 6 gas according to the present invention, and FIGS. 2 and 3 are sectional views showing a structural example of a gas valve in the embodiment. . 1 ... GIS tank, 1A ... Detection opening, 2 ... Conductor, 3 ... SF 6 gas, 4 ... Gas valve, 5 ... Sensor storage cylinder, 6 ... Ultrasonic sensor, 7 ... ... Transmission circuit, 8 ...
... Receiving circuit, 9 ... Sensor self-diagnosis processing circuit, 10 ... Ultrasonic signal processing unit (corona detecting unit), 11 ... Switch.
Claims (1)
SF6ガス中部分放電検出装置において、導体を絶縁するS
F6ガスが充填されたタンクに検出用の開口部を形成する
一方、検出面を除いて超音波吸収材で包まれるように超
音波センサを収納筒に収納し、これを前記開口部全体を
開閉するガス用バルブを介して取り付けたことを特徴と
するSF6ガス中部分放電検出装置。1. Corona discharge is detected by ultrasonic detection.
In SF 6 gas partial discharge detection device, S to insulate the conductors
While F 6 gas to form an opening for detecting the tank filled, with the exception of the detection surface accommodating the ultrasonic sensor as wrapped ultrasonically absorbent material containing cylinder, the entire opening this SF6 gas partial discharge detector mounted via a gas valve that opens and closes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990019222U JP2536942Y2 (en) | 1990-02-27 | 1990-02-27 | SF ▲ 6 ▼ Partial discharge detection device in gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990019222U JP2536942Y2 (en) | 1990-02-27 | 1990-02-27 | SF ▲ 6 ▼ Partial discharge detection device in gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03110378U JPH03110378U (en) | 1991-11-12 |
| JP2536942Y2 true JP2536942Y2 (en) | 1997-05-28 |
Family
ID=31522355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990019222U Expired - Lifetime JP2536942Y2 (en) | 1990-02-27 | 1990-02-27 | SF ▲ 6 ▼ Partial discharge detection device in gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2536942Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5344774U (en) * | 1976-09-22 | 1978-04-17 | ||
| JPS63117274A (en) * | 1986-11-05 | 1988-05-21 | Mitsubishi Electric Corp | Internal abnormality detector for gas sealed type electric apparatus |
-
1990
- 1990-02-27 JP JP1990019222U patent/JP2536942Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03110378U (en) | 1991-11-12 |
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