JP3243752B2 - Partial discharge detection device for gas insulated equipment and its calibration method - Google Patents
Partial discharge detection device for gas insulated equipment and its calibration methodInfo
- Publication number
- JP3243752B2 JP3243752B2 JP16727598A JP16727598A JP3243752B2 JP 3243752 B2 JP3243752 B2 JP 3243752B2 JP 16727598 A JP16727598 A JP 16727598A JP 16727598 A JP16727598 A JP 16727598A JP 3243752 B2 JP3243752 B2 JP 3243752B2
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- JP
- Japan
- Prior art keywords
- discharge
- partial discharge
- gas
- detection device
- generating means
- 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.)
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Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ガス絶縁密封形
開閉装置（以下、ＧＩＳと称す）等ガス絶縁装置内の部
分放電検出試験を実施する部分放電検出装置の校正に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to calibration of a partial discharge detection device for performing a partial discharge detection test in a gas insulation device such as a gas-insulated hermetic switchgear (hereinafter referred to as GIS).
【０００２】[0002]
【従来の技術】ガス絶縁機器の絶縁信頼性の確認、保持
のため、密封容器内の部分放電の監視が有力視されてい
る。特に密封容器内に存在する金属異物等を発見するた
めには、精度の良い部分放電の検出が重要である。部分
放電検出を高精度で実施するには、いかに外部ノイズと
の信号を区別するかによる。この外部ノイズの影響を少
なく部分放電検出を高精度で実施する方法として、近
年、部分放電発生時に各部に放射される電磁波を捕らえ
る方法が注目されている。外部ノイズの主原因となる、
電圧印加装置等の気中高電圧露出部からの気中で発生す
る部分放電は、周波数が低く、ガス絶縁機器内で発生し
たガス中の部分放電は、上記気中で発生した部分放電よ
りも周波数が高い特徴がある。この特徴を利用し、外部
ノイズの比較的少ないガス絶縁機器の内部にアンテナを
取り付け、ハイパスフィルタ等により部分放電発生時に
生じる電磁波の高周波成分のみを捕らえれば、外部ノイ
ズに影響されない精度の高い部分放電検出が可能であ
る。2. Description of the Related Art In order to confirm and maintain the insulation reliability of gas-insulated equipment, monitoring of partial discharge in a sealed container is considered to be promising. In particular, accurate detection of partial discharge is important for finding metallic foreign substances and the like existing in a sealed container. In order to perform partial discharge detection with high accuracy, it is necessary to distinguish signals from external noise. In recent years, attention has been focused on a method of capturing an electromagnetic wave radiated to each part when a partial discharge occurs, as a method of performing the partial discharge detection with high accuracy while reducing the influence of the external noise. The main cause of external noise,
The partial discharge generated in the air from the high voltage exposed part in the air such as a voltage applying device has a low frequency, and the partial discharge in the gas generated in the gas insulating device has a higher frequency than the partial discharge generated in the air. There is a high feature. Utilizing this feature, an antenna is mounted inside a gas insulated device with relatively little external noise, and if high-frequency components of electromagnetic waves generated when partial discharge occurs are captured by a high-pass filter or the like, a high-precision part that is not affected by external noise Discharge detection is possible.
【０００３】ところで、部分放電発生時に放射される電
磁波は、反射等により減衰してガス中を伝播し、アンテ
ナで測定される。このため、部分放電検出装置で部分放
電検出試験を実施する際、前もって、機器固有の電磁波
の減衰量を測定して、部分放電の検出感度を測定可能な
管理値内に校正する作業が必要である。図４は、従来の
ガス絶縁機器の部分放電検出装置の校正作業時形態の構
造を示す図であり、図４（ａ）は全体図、図４（ｂ）は
部分断面図である。図において、１はＧＩＳユニット、
２は接地された金属製の密封容器としてのタンク、３は
タンク２に接続するよう取り付けられたコーン状タン
ク、４はコーン状タンク３に接続されたパルスジェネレ
ータ、５は同軸ケーブル、６は部分放電測定用アンテ
ナ、７は内部に部分放電測定用アンテナ６を有する部分
放電検出試験時の電圧印加ブッシングタンク、８はタン
ク２内部と連通し、ガス吸着剤が格納された枝管部、９
はタンク２内に収容され高電圧が印加される導体、１０
は導体９周囲の絶縁ガス、１１は導体９に接続された印
加線、１２は同軸ケーブル５と印加線１１およびコーン
状タンク３との間に設けられたインピーダンス整合用抵
抗である。Incidentally, electromagnetic waves emitted when a partial discharge occurs are attenuated by reflection or the like, propagate through the gas, and are measured by an antenna. For this reason, when conducting a partial discharge detection test with a partial discharge detection device, it is necessary to measure in advance the attenuation of electromagnetic waves specific to the device and calibrate the partial discharge detection sensitivity to a measurable management value. is there. 4A and 4B are views showing a structure of a conventional partial discharge detection device of a gas-insulated device in a calibration work mode. FIG. 4A is an overall view, and FIG. 4B is a partial cross-sectional view. In the figure, 1 is a GIS unit,
2 is a tank as a grounded metal hermetic container, 3 is a cone-shaped tank attached to be connected to the tank 2, 4 is a pulse generator connected to the cone-shaped tank 3, 5 is a coaxial cable, and 6 is a part. An antenna for discharge measurement, 7 is a bushing tank for applying a voltage during a partial discharge detection test having an antenna 6 for partial discharge measurement inside, 8 is a branch pipe communicating with the inside of the tank 2 and containing a gas adsorbent, 9
Are conductors accommodated in the tank 2 and to which a high voltage is applied;
Is an insulating gas around the conductor 9, 11 is an applied wire connected to the conductor 9, and 12 is an impedance matching resistor provided between the coaxial cable 5 and the applied wire 11 and the cone-shaped tank 3.
【０００４】この様に構成される部分放電検出装置で
は、その校正作業時に、パルスジェネレータ４からＧＩ
Ｓ内部の部分放電波形を模擬した高周波パルスを導体９
部に打ち込み、部分放電測定用アンテナ６により電磁波
を測定する。パルスジェネレータ４から入力される部分
放電波形を模擬した高周波パルスは、波形の時間積分に
より電荷量が既知のものとし、同軸ケーブル５、インピ
ーダンス整合用抵抗１２を介して高周波パルスが伝送し
やすい形状であるコーン状タンク３内の印加線１１から
導体９に印加される。入力した高周波パルスの電荷量
（注入電荷量）と部分放電測定用アンテナ６の出力値と
の関係を図３に示す。双方の変量を共に対数表示とする
と、一定の傾きを有する直線が得られ、この傾きが機器
固有の電磁波の減衰量を示すものである。この減衰量に
より表される部分放電の検出感度が、管理値内であるこ
とを確認し、管理値を外れる場合は所定の処置を施した
後、再び上述したような減衰量の測定を行うことによ
り、部分放電検出装置を校正する。[0004] In the partial discharge detection device having the above-described configuration, the GI signal is output from the pulse generator 4 during the calibration operation.
The high frequency pulse simulating the partial discharge waveform inside S is applied to conductor 9
The electromagnetic wave is measured by the antenna 6 for partial discharge measurement. A high-frequency pulse simulating a partial discharge waveform input from the pulse generator 4 has a charge amount known by time integration of the waveform, and has such a shape that the high-frequency pulse can be easily transmitted through the coaxial cable 5 and the impedance matching resistor 12. The voltage is applied to the conductor 9 from an application line 11 in a certain cone-shaped tank 3. FIG. 3 shows the relationship between the charge amount (injected charge amount) of the input high-frequency pulse and the output value of the antenna 6 for partial discharge measurement. If both variables are expressed in logarithms, a straight line having a certain slope is obtained, and this slope indicates the attenuation of the electromagnetic wave inherent to the device. Confirm that the detection sensitivity of the partial discharge represented by this attenuation is within the control value.If the detection sensitivity deviates from the control value, take a predetermined measure and measure the attenuation again as described above. Is used to calibrate the partial discharge detection device.
【０００５】[0005]
【発明が解決しようとする課題】従来の部分放電検出装
置は以上のように構成されており、タンク２にコーン状
タンク３を取り付け、インピーダンス整合を行って、部
分放電波形を模擬した高周波パルスを入力して、部分放
電測定用アンテナ６で測定することにより、校正作業を
行っていた。コーン状タンク３の取り付けに当たって
は、タンク２を開放する必要がある。またコーン状タン
ク３は絶縁性能が装置構成上とれないため、校正作業が
終了して電圧を印加する際には、コーン状タンク３を取
り外し、再度絶縁ガス１０のガス処理を行う必要があっ
た。この様に従来の部分放電検出装置は、コーン状タン
ク３の取り付け、取り外しによる著しい不利益を生じる
問題点があった。The conventional partial discharge detecting device is configured as described above. A cone-shaped tank 3 is attached to the tank 2, impedance matching is performed, and a high-frequency pulse simulating a partial discharge waveform is generated. The calibration work was performed by inputting and measuring with the antenna 6 for partial discharge measurement. In mounting the cone-shaped tank 3, it is necessary to open the tank 2. Further, since the insulation performance of the cone-shaped tank 3 cannot be maintained in the apparatus configuration, when the calibration operation is completed and a voltage is applied, it is necessary to remove the cone-shaped tank 3 and perform the gas treatment of the insulating gas 10 again. . As described above, the conventional partial discharge detection device has a problem in that the installation and removal of the cone-shaped tank 3 causes a significant disadvantage.
【０００６】この発明は、上記のような問題点を解消す
るために成されたものであって、部分放電検出試験に前
もって実施される校正作業が、安価で容易に行うことが
できるガス絶縁機器の部分放電検出装置の構造、および
その校正方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and is a gas-insulated apparatus in which a calibration operation performed in advance for a partial discharge detection test can be performed easily at a low cost. It is an object of the present invention to provide a structure of a partial discharge detecting device and a calibration method thereof.
【０００７】[0007]
【課題を解決するための手段】この発明に係わる請求項
１記載のガス絶縁機器の部分放電検出装置は、高電圧が
印加される導体および絶縁ガスを収容した密封容器内部
で発生した部分放電を、該部分放電発生時に生じる電磁
波を測定する電磁波測定手段を有して検出する装置校正
であって、上記導体に対向するように上記密封容器に絶
縁支持された中間電極と、該中間電極と所定の間隔で対
向するように配置された接地側電極とから成り、上記中
間電極と上記接地側電極との間に放電を発生させる放電
発生手段と、上記接地側電極と接地との間に接続され、
上記放電発生手段により発生した放電電荷量を検出する
放電電荷量検出手段と、上記放電発生手段による放電発
生時に上記電磁波測定手段により電磁波測定を行なっ
て、該電磁波測定手段の出力と上記放電電荷量検出手段
の出力とで上記部分放電検出の校正を行う校正手段とを
有するものである。According to a first aspect of the present invention, there is provided an apparatus for detecting partial discharge of a gas-insulated apparatus, wherein a partial discharge generated inside a sealed container containing a conductor to which a high voltage is applied and an insulating gas is contained. An apparatus for detecting and detecting an electromagnetic wave generated when the partial discharge occurs, comprising: an intermediate electrode insulated and supported by the sealed container so as to face the conductor; A discharge generating means for generating a discharge between the intermediate electrode and the ground electrode; and a discharge generating means connected between the ground electrode and the ground. ,
A discharge charge amount detecting means for detecting a discharge charge amount generated by the discharge generating means, and an electromagnetic wave measurement by the electromagnetic wave measuring means when a discharge is generated by the discharge generating means, and an output of the electromagnetic wave measuring means and the discharge charge amount Calibrating means for calibrating the partial discharge detection with the output of the detecting means.
【０００８】この発明に係わる請求項２記載のガス絶縁
機器の部分放電検出装置は、中間電極および接地側電極
のいずれか一方に他方に向かって突起を有するものであ
る。According to a second aspect of the present invention, there is provided a partial discharge detection device for a gas insulated device, wherein one of the intermediate electrode and the ground electrode has a projection toward the other.
【０００９】この発明に係わる請求項３記載のガス絶縁
機器の部分放電検出装置は、放電発生手段を導体に対し
て接離する方向に密封容器内で移動させる移動手段を有
するものである。According to a third aspect of the present invention, there is provided a partial discharge detecting device for a gas insulated device, comprising moving means for moving the discharge generating means in a sealed container in a direction of coming into contact with and separating from the conductor.
【００１０】この発明に係わる請求項４記載のガス絶縁
機器の部分放電検出装置は、放電発生手段の移動手段
が、導体と垂直方向に移動するものである。According to a fourth aspect of the present invention, in the gas discharge apparatus, the moving means of the discharge generating means moves in a direction perpendicular to the conductor.
【００１１】この発明に係わる請求項５記載のガス絶縁
機器の部分放電検出装置は、密封容器を該密封容器内部
と連通する枝管部を備えたものとし、放電発生手段を、
該放電発生時以外に上記枝管部に収納するものである。According to a fifth aspect of the present invention, there is provided a partial discharge detecting device for a gas insulated device, wherein the sealed container is provided with a branch pipe portion communicating with the inside of the sealed container, and the discharge generating means includes:
It is housed in the branch pipe portion except when the discharge occurs.
【００１２】この発明に係わる請求項６記載のガス絶縁
機器の部分放電検出装置は、枝管部内にガス吸着剤を格
納し、該ガス吸着剤を覆うように上記枝管部の密封容器
側に接地シールドを設け、放電発生手段を、該放電発生
時以外に上記枝管部の接地シールド内に収納するもので
ある。According to a sixth aspect of the present invention, there is provided a partial discharge detecting device for a gas insulated device, wherein a gas adsorbent is stored in a branch pipe portion, and the gas adsorbent is covered on the side of the sealed vessel side of the branch pipe portion. A ground shield is provided, and the discharge generating means is housed in the ground shield of the branch pipe portion except when the discharge occurs.
【００１３】[0013]
【発明の実施の形態】実施の形態１．以下、この発明の
実施の形態１を図について説明する。図１は、この発明
の実施の形態１によるガス絶縁機器の部分放電検出装置
の校正作業時形態の構造を示す図であり、図１（ａ）は
全体図、図１（ｂ）は部分断面図である。図において、
１３はＧＩＳユニット、１４は接地された金属製の密封
容器としてのタンク、１５はタンク１４内部と連通する
枝管部、１６は枝管部１５に設けられた放電発生装置、
１７は電磁波測定手段としての部分放電測定用アンテ
ナ、１８は内部に部分放電測定用アンテナ１７を有する
部分放電検出試験時の電圧印加ブッシングタンクであ
る。また、図１（ｂ）に示す放電発生装置１６において
は、１９はタンク２内に収容され高電圧が印加される導
体、２０は導体１９周囲の絶縁ガス、２１はタンク１４
内で導体１９に対向する様に配置された中間電極、２２
は中間電極２１と所定の間隔、例えば１５ｍｍ程度離間
して、中間電極２１に対向するように配置された接地側
電極、２３はこれら中間電極２１と接地側電極２２とで
構成される放電発生手段、２４は中間電極２１に接地側
電極２２に向かって設けられた突起、２５および２６は
絶縁物で、放電発生手段２３をタンク１４内で絶縁支持
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a structure of a partial discharge detection device for a gas insulated device according to a first embodiment of the present invention in a calibration operation mode, wherein FIG. 1 (a) is an overall view and FIG. 1 (b) is a partial cross section. FIG. In the figure,
13 is a GIS unit, 14 is a grounded metal sealed container tank, 15 is a branch pipe communicating with the inside of the tank 14, 16 is a discharge generator provided in the branch pipe 15,
Reference numeral 17 denotes an antenna for measuring partial discharge as an electromagnetic wave measuring means, and reference numeral 18 denotes a bushing tank for applying a voltage during a partial discharge detection test, which has an antenna 17 for measuring partial discharge therein. In the discharge generator 16 shown in FIG. 1B, reference numeral 19 denotes a conductor accommodated in the tank 2 to which a high voltage is applied, reference numeral 20 denotes an insulating gas around the conductor 19, and reference numeral 21 denotes a tank 14
An intermediate electrode 22 arranged to face the conductor 19 within
Is a ground electrode disposed at a predetermined distance from the intermediate electrode 21, for example, about 15 mm, and opposed to the intermediate electrode 21. 23 is a discharge generating means composed of the intermediate electrode 21 and the ground electrode 22. , 24 are projections provided on the intermediate electrode 21 toward the ground electrode 22, and 25 and 26 are insulators, which insulate and support the discharge generating means 23 in the tank 14.
【００１４】また２７は接地側電極２２に接続され放電
により生じた電流をインピーダンスにより電圧に変換し
て検出する検出インピーダンス、２８は同軸ケーブル、
２９は検出された電圧波形を観測するオシロスコープ、
３０は枝管部１５の底部に設けられ絶縁ガス２０を密封
するフランジ、３１はフランジ３０の外側（気中部）に
取り付けられた、放電発生手段２３の移動手段としての
昇降装置、３２はフランジ３０に設けられたＯリング
で、絶縁ガス２０の密封を保ち、昇降装置３１による放
電発生手段２３の昇降を可能にする。また３３は枝管部
１５のタンク１４側に設けられた接地シールド、３４は
接地シールド３３に覆われる様に枝管部１５内に格納さ
れた、分解ガスの吸着およびタンク１４内の水分管理の
ためのガス吸着剤である。Reference numeral 27 denotes a detection impedance which is connected to the ground electrode 22 and converts a current generated by the discharge into a voltage by impedance and detects the voltage. 28 denotes a coaxial cable.
29 is an oscilloscope for observing the detected voltage waveform,
Reference numeral 30 denotes a flange provided at the bottom of the branch pipe portion 15 to seal the insulating gas 20; 31 denotes an elevating device as a moving means of the discharge generating means 23 which is attached to the outside (aerial part) of the flange 30; The O-ring provided at the base plate keeps the insulating gas 20 sealed, and allows the lifting / lowering device 31 to raise / lower the discharge generating means 23. Reference numeral 33 denotes a ground shield provided on the tank 14 side of the branch pipe portion 15, and reference numeral 34 denotes absorption of decomposition gas and moisture management in the tank 14 stored in the branch pipe portion 15 so as to be covered by the ground shield 33. Is a gas adsorbent.
【００１５】上述したように、部分放電検出装置におい
て、部分放電発生時に放射される電磁波は、反射等によ
り減衰して絶縁ガス２０中を伝播し、部分放電測定用ア
ンテナ１７で測定される。このため、部分放電検出装置
により部分放電検出試験を実施する際、前もって、機器
固有の電磁波の減衰量を測定して、部分放電の検出感度
を測定可能な管理値内に校正する作業が必要である。上
記のように構成されるこの実施の形態１による部分放電
検出装置では、その校正作業時に、ブッシングタンク１
８で導体１９に電圧印加を行い、放電発生手段２３によ
り、中間電極２１と接地側電極２２との間に微小な放電
を発生させる。中間電極２１と接地側電極２２との間に
は、導体１９と中間電極２１間の静電容量Ｃ１と、中間
電極２１と接地側電極２２間の静電容量Ｃ２との比率で
決定される分担電圧が加わり、この分担電圧が放電開始
電圧以上になると、中間電極２１の突起２４と接地側電
極２２との間に放電が発生する。突起２４は放電開始電
圧を小さくし、安定した放電を得る効果があり、放電開
始電圧は、導体１９と中間電極２１間よりも中間電極２
１と接地側電極２２間の方が小さいため、全路破壊を招
く導体１９と中間電極２１間の放電を生じることなく、
中間電極２１と接地側電極２２との間に微小な放電を発
生させることができる。なお、突起２４は高電圧側であ
る中間電極２１に設けられるのがより効果的であるが、
接地側電極２２に設けられても良い。As described above, in the partial discharge detecting device, the electromagnetic wave radiated when the partial discharge occurs is attenuated by reflection or the like, propagates through the insulating gas 20, and is measured by the partial discharge measuring antenna 17. For this reason, when conducting a partial discharge detection test using a partial discharge detection device, it is necessary to measure in advance the attenuation of electromagnetic waves specific to the device and calibrate the partial discharge detection sensitivity to a measurable management value. is there. In the partial discharge detection device according to the first embodiment configured as described above, the bushing tank 1
At 8, a voltage is applied to the conductor 19, and the discharge generating means 23 generates a minute discharge between the intermediate electrode 21 and the ground electrode 22. The sharing between the intermediate electrode 21 and the ground electrode 22 is determined by the ratio of the capacitance C1 between the conductor 19 and the intermediate electrode 21 and the capacitance C2 between the intermediate electrode 21 and the ground electrode 22. When a voltage is applied and the shared voltage becomes equal to or higher than the discharge starting voltage, a discharge occurs between the protrusion 24 of the intermediate electrode 21 and the ground electrode 22. The projections 24 have the effect of reducing the discharge starting voltage and obtaining a stable discharge. The discharge starting voltage is higher than that between the conductor 19 and the intermediate electrode 21.
1 and the ground-side electrode 22 are smaller, so that no discharge occurs between the conductor 19 and the intermediate electrode 21 that causes the entire circuit to be destroyed.
A minute discharge can be generated between the intermediate electrode 21 and the ground electrode 22. It is more effective that the protrusion 24 is provided on the intermediate electrode 21 on the high voltage side.
It may be provided on the ground electrode 22.
【００１６】発生した放電は、接地側電極２２と接地間
に接続された検出インピーダンス２７で検出して同軸ケ
ーブル２８によりオシロスコープ２９に導いて電圧波形
を観測して、電圧を時間積分することにより放電電荷量
を検出する。一方、この放電発生手段２３による放電発
生時に、部分放電測定用アンテナ１７により電磁波を測
定する。放電発生手段２３により発生した放電電荷量
（注入電荷量）と部分放電測定用アンテナ１７の出力値
との関係から、図３に示す従来のものと同様の特性が得
られる。双方の変量を共に対数表示とすると、一定の傾
きを有する直線が得られ、この傾きが機器固有の電磁波
の減衰量を示すものである。この減衰量により表される
部分放電の検出感度が、管理値内であることを確認し、
管理値を外れる場合は所定の処置を施した後、再び上述
したような減衰量の測定を行うことにより、部分放電検
出装置を校正する。この様に、放電発生手段２３により
微小な放電を発生させて、機器固有の減衰量を測定する
ため、従来のように、大規模なコーン状タンク３による
高周波パルスを発生させる場合に比べ、小さな放電発生
手段２３で済み、装置構成が簡便になると共に、校正作
業終了時の放電発生手段２３の処置も容易になる。The generated discharge is detected by a detection impedance 27 connected between the ground electrode 22 and the ground, guided to an oscilloscope 29 by a coaxial cable 28, and a voltage waveform is observed. The amount of charge is detected. On the other hand, when a discharge is generated by the discharge generating means 23, an electromagnetic wave is measured by the partial discharge measuring antenna 17. From the relationship between the amount of discharge charge (the amount of injected charge) generated by the discharge generation means 23 and the output value of the antenna 17 for partial discharge measurement, the same characteristics as those of the related art shown in FIG. 3 can be obtained. If both variables are expressed in logarithms, a straight line having a certain slope is obtained, and this slope indicates the attenuation of the electromagnetic wave inherent to the device. Confirm that the partial discharge detection sensitivity represented by this attenuation is within the control value,
If the value deviates from the control value, a predetermined measure is taken, and the above-described measurement of the amount of attenuation is performed again to calibrate the partial discharge detection device. As described above, since a small discharge is generated by the discharge generating means 23 and the amount of attenuation inherent to the device is measured, a smaller amount of the high-frequency pulse is generated as compared with the conventional case where a high-frequency pulse is generated by the large-scale cone-shaped tank 3. Since the discharge generating means 23 is sufficient, the configuration of the apparatus is simplified, and the treatment of the discharge generating means 23 at the end of the calibration work is also facilitated.
【００１７】この校正作業終了時の放電発生手段２３の
処置については、この実施の形態では放電発生手段２３
を昇降装置３１によって移動可能とし、校正作業時にタ
ンク１４内で導体１９側に配置された放電発生手段２３
を、校正作業終了時には、導体１９から遠方位置に移動
させる。この場合、導体１９と垂直方向に移動し、校正
作業時以外は、放電発生手段２３を枝管部１５に収納す
ることにより、微小放電の生じることのない状態に即座
にできる。これにより、校正作業のためにタンク１４を
開放する必要なく、そのためのガス処理作業などを省略
でき、ガス絶縁機器の信頼性が向上すると共に、容易で
安価に信頼性の高い部分放電検出装置の校正を行うこと
ができる。また、この実施の形態では、枝管部１５にガ
ス吸着剤３４を格納し、ガス吸着剤３４を覆うように、
枝管部１５のタンク１４側に接地シールド３３を備え、
この接地シールド３３の中央に設けられたくぼみに放電
発生手段２３を収納できるようにした。このため、ガス
吸着剤３４を格納する枝管部１５を放電発生手段２３の
収納に用いることができ、枝管部１５を増設することな
く装置構成が簡便になるとともに、ガス漏れの可能性の
ある箇所が低減できることによりガス絶縁機器の信頼性
も向上できる。また、校正作業終了後（校正作業時以
外）は、図２に示すように、放電発生手段２３を接地シ
ールド３３の設けられた枝管部１５に収納し、昇降装置
３１を取り外して、フランジ３０と０リングで接合する
カバー３５を取り付ける。Regarding the treatment of the discharge generating means 23 at the end of this calibration work, in this embodiment,
Can be moved by an elevating device 31, and the discharge generating means 23 disposed on the conductor 19 side in the tank 14 during the calibration operation.
Is moved to a position far from the conductor 19 at the end of the calibration work. In this case, by moving in a direction perpendicular to the conductor 19 and storing the discharge generating means 23 in the branch tube portion 15 except during calibration work, a state in which a minute discharge does not occur can be immediately achieved. Accordingly, it is not necessary to open the tank 14 for the calibration work, and the gas processing work for the tank work can be omitted. As a result, the reliability of the gas insulated equipment is improved, and the partial discharge detection device which is easy, inexpensive and has high reliability is provided. Calibration can be performed. Further, in this embodiment, the gas adsorbent 34 is stored in the branch pipe portion 15 so as to cover the gas adsorbent 34.
A ground shield 33 is provided on the tank 14 side of the branch pipe section 15,
The discharge generating means 23 can be accommodated in a recess provided at the center of the ground shield 33. For this reason, the branch 15 storing the gas adsorbent 34 can be used for storing the discharge generating means 23, and the apparatus configuration is simplified without adding the branch 15 and the possibility of gas leakage is increased. The reliability of the gas-insulated equipment can be improved by reducing a certain portion. After completion of the calibration work (other than at the time of the calibration work), as shown in FIG. And a cover 35 to be joined with the O-ring.
【００１８】実際の校正作業においては、例えば、ブッ
シングタンク１８で導体１９に６０ｋＶ程度の一定電圧
を印加し、放電発生手段２３を昇降装置３１により導体
１９に向かって徐々に移動させて、中間電極２１と接地
側電極２２との間に放電を発生させる。このときの放電
電圧を検出インピーダンス２７で検出した後放電電荷量
を演算して検出するとともに、この放電発生時に部分放
電測定用アンテナ１７により電磁波を測定し、この測定
値と上記放電電荷量の値とから部分放電検出装置の校正
を行う。これにより、校正作業のためにタンク１４を開
放する必要なく、ガス絶縁機器の信頼性が向上でき、容
易で安価に信頼性の高い部分放電検出装置の校正を行う
ことができる。なお、例えば、導体１９とタンク１４壁
面との距離が４００ｍｍ程度とするとき、中間電極２１
と導体１９との距離が２５０ｍｍ程度で放電発生手段２
３を配置し、この位置で放電発生手段を２３を固定した
状態で、ブッシングタンク１８から導体１９に印加する
電圧を徐々に上昇させることによって放電を発生させて
も良く、上記導体１９に一定電圧を印加した場合と同様
の効果が得られる。In an actual calibration operation, for example, a constant voltage of about 60 kV is applied to the conductor 19 in the bushing tank 18 and the discharge generating means 23 is gradually moved toward the conductor 19 by the lifting device 31 to thereby change the intermediate electrode. A discharge is generated between the first electrode 21 and the ground electrode 22. After the discharge voltage at this time is detected by the detection impedance 27, the discharge charge amount is calculated and detected, and at the time of this discharge, an electromagnetic wave is measured by the partial discharge measurement antenna 17, and the measured value and the value of the discharge charge amount are measured. Then, the calibration of the partial discharge detection device is performed. This makes it possible to improve the reliability of the gas insulated equipment without having to open the tank 14 for the calibration work, and to perform the calibration of the highly reliable partial discharge detection device easily, at low cost. For example, when the distance between the conductor 19 and the wall surface of the tank 14 is about 400 mm, the intermediate electrode 21
The distance between the conductor and the conductor 19 is about 250 mm
The discharge may be generated by gradually increasing the voltage applied from the bushing tank 18 to the conductor 19 with the discharge generator 23 fixed at this position. The same effect as in the case of applying is obtained.
【００１９】[0019]
【発明の効果】以上の様に、この発明に係わる請求項１
記載のガス絶縁機器の部分放電検出装置は、導体に対向
するように密封容器に絶縁支持された中間電極と、該中
間電極と所定の間隔で対向するように配置された接地側
電極とから成り、上記中間電極と上記接地側電極との間
に放電を発生させる放電発生手段と、上記接地側電極と
接地との間に接続され、上記放電発生手段により発生し
た放電電荷量を検出する放電電荷量検出手段と、上記放
電発生手段による放電発生時に電磁波測定手段により電
磁波測定を行なって、該電磁波測定手段の出力と上記放
電電荷量検出手段の出力とで上記部分放電検出の校正を
行う校正手段とを有するため、ガス絶縁機器の信頼性を
向上することができるとともに、部分放電検出装置の装
置構成が簡便になり、容易で安価に部分放電検出装置の
校正が可能になる。As described above, the first aspect of the present invention is as follows.
The partial discharge detection device for a gas-insulated device according to the present invention includes an intermediate electrode insulated and supported in a sealed container so as to face a conductor, and a ground-side electrode arranged to face the intermediate electrode at a predetermined interval. A discharge generating means for generating a discharge between the intermediate electrode and the ground electrode; and a discharge charge connected between the ground electrode and the ground for detecting a discharge charge generated by the discharge generating means. Calibration means for performing an electromagnetic wave measurement by an electromagnetic wave measurement means when a discharge is generated by the discharge generation means, and calibrating the partial discharge detection with an output of the electromagnetic wave measurement means and an output of the discharge charge amount detection means Therefore, the reliability of the gas insulated equipment can be improved, and the configuration of the partial discharge detection device can be simplified, and the calibration of the partial discharge detection device can be performed easily and inexpensively.
【００２０】またこの発明に係わる請求項２記載のガス
絶縁機器の部分放電検出装置は、中間電極および接地側
電極のいずれか一方に他方に向かって突起を有するた
め、放電開始電圧を小さくして安定した微小な放電を容
易に得ることができ、全路破壊を確実に防止する。Further, in the partial discharge detecting device for gas-insulated equipment according to the present invention, one of the intermediate electrode and the ground-side electrode has a projection toward the other, so that the discharge starting voltage is reduced. It is possible to easily obtain a stable and minute discharge, and to reliably prevent the entire road from being destroyed.
【００２１】またこの発明に係わる請求項３記載のガス
絶縁機器の部分放電検出装置は、放電発生手段を導体に
対して接離する方向に密封容器内で移動させる移動手段
を有するため、放電発生手段を、校正作業時に導体側
に、校正作業時以外に、導体から遠方位置に容易に移動
させることができ、ガス絶縁機器の信頼性を向上するこ
とができるとともに、部分放電検出装置の装置構成が簡
便になり、容易で安価に部分放電検出装置の校正が可能
になる効果を確実に得ることができる。According to a third aspect of the present invention, there is provided a partial discharge detecting device for a gas insulated device, which includes a moving means for moving the discharge generating means in a direction toward and away from the conductor in the sealed container. The means can be easily moved to the conductor side during the calibration work, and can be easily moved to a position far from the conductor except during the calibration work, so that the reliability of the gas insulated equipment can be improved and the device configuration of the partial discharge detection device Therefore, it is possible to reliably obtain the effect that the partial discharge detection device can be calibrated easily and inexpensively.
【００２２】またこの発明に係わる請求項４記載のガス
絶縁機器の部分放電検出装置は、放電発生手段の移動手
段が、導体と垂直方向に移動するものであるため、放電
発生手段を導体に対して接離する方向に効果的に移動で
き、ガス絶縁機器の信頼性を向上することができるとと
もに、部分放電検出装置の装置構成が簡便になり、容易
で安価に部分放電検出装置の校正が可能になる効果を確
実に得ることができる。According to the fourth aspect of the present invention, in the partial discharge detecting device for a gas insulated device, the moving means of the discharge generating means moves in a direction perpendicular to the conductor. Can effectively move in the direction of contact and separation, improve the reliability of gas-insulated equipment, simplify the device configuration of the partial discharge detection device, and can calibrate the partial discharge detection device easily and inexpensively Can be reliably obtained.
【００２３】またこの発明に係わる請求項５記載のガス
絶縁機器の部分放電検出装置は、密封容器を該密封容器
内部と連通する枝管部を備えたものとし、放電発生手段
を、該放電発生時以外に上記枝管部に収納するため、校
正作業時以外に早く確実に放電発生を消滅させることが
でき、ガス絶縁機器の信頼性を向上することができると
ともに、部分放電検出装置の装置構成が簡便になり、容
易で安価に部分放電検出装置の校正が可能になる効果を
確実に得ることができる。According to a fifth aspect of the present invention, there is provided a partial discharge detecting device for a gas insulated device, wherein the sealed container is provided with a branch pipe portion communicating with the inside of the sealed container. Since it is housed in the above-mentioned branch pipe portion other than at the time, the occurrence of discharge can be eliminated quickly and reliably other than at the time of calibration work, the reliability of the gas insulated equipment can be improved, and the device configuration of the partial discharge detection device Therefore, it is possible to reliably obtain the effect that the partial discharge detection device can be calibrated easily and inexpensively.
【００２４】またこの発明に係わる請求項６記載のガス
絶縁機器の部分放電検出装置は、枝管部内にガス吸着剤
を格納し、該ガス吸着剤を覆うように上記枝管部の密封
容器側に接地シールドを設け、放電発生手段を、該放電
発生時以外に上記枝管部の接地シールド内に収納するた
め、ガス絶縁機器の信頼性をさらに向上することができ
るとともに、部分放電検出装置の装置構成もさらに簡便
になり、容易で安価に部分放電検出装置の校正が可能に
なる効果を確実に得ることができる。According to a sixth aspect of the present invention, there is provided a partial discharge detecting device for a gas insulated device, wherein a gas adsorbent is stored in a branch pipe, and the branch pipe is provided on the side of the sealed vessel so as to cover the gas adsorbent. A grounding shield is provided in the grounding shield, and the discharge generating means is housed in the grounding shield of the branch pipe portion except when the discharge occurs, so that the reliability of the gas insulated equipment can be further improved and the partial discharge detection device The apparatus configuration is further simplified, and the effect that the partial discharge detection device can be calibrated easily and inexpensively can be reliably obtained.
【図１】 この発明の実施の形態１によるガス絶縁機器
の部分放電検出装置の校正作業時形態の構造を示す全体
図および部分拡大図である。FIG. 1 is an overall view and a partially enlarged view showing a structure of a partial discharge detection device for a gas insulated device according to a first embodiment of the present invention in a calibration work mode.
【図２】 この発明の実施の形態１によるガス絶縁機器
の部分放電検出装置の校正作業終了時形態の構造を示す
部分拡大図である。FIG. 2 is a partially enlarged view showing the structure of the partial discharge detection device for a gas insulated device according to Embodiment 1 of the present invention at the end of the calibration operation.
【図３】 ガス絶縁機器の部分放電検出装置の校正時の
出力特性を説明する図である。FIG. 3 is a diagram illustrating output characteristics at the time of calibration of a partial discharge detection device of a gas insulated device.
【図４】 従来のガス絶縁機器の部分放電検出装置の校
正作業時形態の構造を示す全体図および部分拡大図であ
る。FIG. 4 is an overall view and a partially enlarged view showing the structure of a conventional partial discharge detection device of a gas-insulated device in a calibration work mode.
１４ 密封容器としての導体、１５ 枝管部、１７ 電
磁波測定手段としての部分放電測定アンテナ、１８ 電
圧印加ブロッシングタンク、１９ 導体、２０ 絶縁ガ
ス、２１ 中間電極、２２ 接地側電極、２３ 放電発
生手段、２４ 突起、２５，２６ 絶縁物、２７ 検出
インピーダンス、３１ 移動手段としての昇降装置、３
３ 接地シールド、３４ ガス吸着剤。14 Conductor as a sealed container, 15 Branch pipe part, 17 Partial discharge measurement antenna as an electromagnetic wave measuring means, 18 Voltage applying blossing tank, 19 Conductor, 20 Insulating gas, 21 Intermediate electrode, 22 Ground electrode, 23 Discharge generating means , 24 protrusion, 25, 26 insulator, 27 detection impedance, 31 lifting device as moving means, 3
3 Ground shield, 34 gas adsorbent.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松田 道明 東京都千代田区丸の内二丁目２番３号 三菱電機株式会社内 (56)参考文献 特開 平５−74256（ＪＰ，Ａ) 特開 平９−196997（ＪＰ，Ａ) 特開 平10−185980（ＪＰ，Ａ) 特開 平10−170598（ＪＰ，Ａ) 特開 平10−38959（ＪＰ，Ａ) 特開 昭59−143973（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01R 31/12 G01R 35/00 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Michiaki Matsuda 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (56) References JP-A-5-74256 (JP, A) JP-A-9 JP-A-196997 (JP, A) JP-A-10-185980 (JP, A) JP-A-10-170598 (JP, A) JP-A-10-38959 (JP, A) JP-A-59-143973 (JP, A) (58) Fields surveyed (Int. Cl. 7 , DB name) G01R 31/12 G01R 35/00
Claims (6)
を収容した密封容器内部で発生した部分放電を、該部分
放電発生時に生じる電磁波を測定する電磁波測定手段を
有して検出するガス絶縁機器の部分放電検出装置におい
て、上記導体に対向するように上記密封容器に絶縁支持
された中間電極と、該中間電極と所定の間隔で対向する
ように配置された接地側電極とから成り、上記中間電極
と上記接地側電極との間に放電を発生させる放電発生手
段と、上記接地側電極と接地との間に接続され、上記放
電発生手段により発生した放電電荷量を検出する放電電
荷量検出手段と、上記放電発生手段による放電発生時に
上記電磁波測定手段により電磁波測定を行なって、該電
磁波測定手段の出力と上記放電電荷量検出手段の出力と
で上記部分放電検出の校正を行う校正手段とを有するこ
とを特徴とするガス絶縁機器の部分放電検出装置。1. A gas insulation device for detecting a partial discharge generated inside a sealed container containing a conductor to which a high voltage is applied and an insulating gas and having an electromagnetic wave measuring means for measuring an electromagnetic wave generated when the partial discharge occurs. The partial discharge detection device of the above, comprising: an intermediate electrode insulated and supported by the sealed container so as to face the conductor; and a ground-side electrode disposed so as to face the intermediate electrode at a predetermined interval. Discharge generating means for generating a discharge between an electrode and the ground electrode, and discharge charge detecting means connected between the ground electrode and the ground for detecting a discharge charge generated by the discharge generating means And performing an electromagnetic wave measurement by the electromagnetic wave measuring means when a discharge is generated by the discharge generating means, and detecting the partial discharge by an output of the electromagnetic wave measuring means and an output of the discharge charge amount detecting means. A partial discharge detection device for gas-insulated equipment, comprising: a calibrating means for calibrating the partial discharge.
方に他方に向かって突起を有することを特徴とする請求
項１記載のガス絶縁機器の部分放電検出装置。2. The partial discharge detection device for gas-insulated equipment according to claim 1, wherein one of the intermediate electrode and the ground electrode has a protrusion toward the other.
向に密封容器内で移動させる移動手段を有することを特
徴とする請求項１または２記載のガス絶縁機器の部分放
電検出装置。3. The partial discharge detection device for gas-insulated equipment according to claim 1, further comprising moving means for moving the discharge generating means in a direction in which the discharge generating means comes into contact with or separate from the conductor in the sealed container.
方向に移動するものであることを特徴とする請求項３記
載のガス絶縁機器の部分放電検出装置。4. The partial discharge detecting device for gas-insulated equipment according to claim 3, wherein the moving means of the discharge generating means moves in a direction perpendicular to the conductor.
管部を備えたものとし、放電発生手段を、該放電発生時
以外に上記枝管部に収納することを特徴とする請求項３
または４記載のガス絶縁機器の部分放電検出装置。5. The sealed container is provided with a branch pipe portion communicating with the inside of the sealed container, and discharge generating means is housed in the branch pipe portion except when the discharge occurs.
Or a partial discharge detection device for gas-insulated equipment according to 4.
吸着剤を覆うように上記枝管部の密封容器側に接地シー
ルドを設け、放電発生手段を、該放電発生時以外に上記
枝管部の接地シールド内に収納することを特徴とする請
求項５記載のガス絶縁機器の部分放電検出装置。6. A branch pipe section containing a gas adsorbent, a grounding shield provided on the side of the branch pipe section on the side of the sealed vessel so as to cover the gas adsorbent, and a discharge generating means, wherein the discharge generating means is provided except when the discharge occurs. 6. The partial discharge detection device for gas-insulated equipment according to claim 5, wherein the partial discharge detection device is housed in a ground shield of a branch pipe portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16727598A JP3243752B2 (en) | 1998-06-15 | 1998-06-15 | Partial discharge detection device for gas insulated equipment and its calibration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16727598A JP3243752B2 (en) | 1998-06-15 | 1998-06-15 | Partial discharge detection device for gas insulated equipment and its calibration method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000002742A JP2000002742A (en) | 2000-01-07 |
| JP3243752B2 true JP3243752B2 (en) | 2002-01-07 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16727598A Expired - Fee Related JP3243752B2 (en) | 1998-06-15 | 1998-06-15 | Partial discharge detection device for gas insulated equipment and its calibration method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3243752B2 (en) |
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