JP2008067536A - Gas insulated power apparatus and abnormality detection method therefor - Google Patents

Gas insulated power apparatus and abnormality detection method therefor Download PDF

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JP2008067536A
JP2008067536A JP2006243960A JP2006243960A JP2008067536A JP 2008067536 A JP2008067536 A JP 2008067536A JP 2006243960 A JP2006243960 A JP 2006243960A JP 2006243960 A JP2006243960 A JP 2006243960A JP 2008067536 A JP2008067536 A JP 2008067536A
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gas
sealed container
tank
ground tank
adsorbent
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Hiroyuki Shinkai
裕行 新開
Kaoru Takuma
薫 宅間
Masafumi Yashima
政史 八島
Hisashi Goshima
久司 五島
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Central Research Institute of Electric Power Industry
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<P>PROBLEM TO BE SOLVED: To provide a gas insulated power apparatus which can detect abnormalities of the inside with high sensitivity, and to provide its abnormality detection method. <P>SOLUTION: In the gas insulated power apparatus which contains a conductor 3 in a grounded tank 2, filled with insulating gas 1 in an electrically insulated state and removes decomposed gas of the insulating gas 1 generated in the grounded tank 2, while being adsorbed in an adsorbent 4, the adsorbent 4 is contained in an enclosed container 5 independently of the grounded tank 2, the enclosed container 5 is connected to the grounded tank 2 to are interconnected to the inside of the enclosed containers and to the grounded tank 2. In the interconnection passage from the grounded tank 2 to the adsorbent 4, medication 35 tarnished by contacting the decomposited gas, and a peering portion 38 for making the medicine 35 visible from the outside are provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えばＳＦ６ガスやＳＦ６ガスを含む混合ガス等を主絶縁媒体あるいはアーク消弧媒体等として用いたガス絶縁電力機器、例えば、ガス絶縁開閉装置（ＧＩＳ）、ガス遮断器（ＧＣＢ）、キュービクル形ガス開閉装置（Ｃ−ＧＩＳ）、ガス絶縁変圧器、管路気中ガス絶縁送電線路（ＧＩＬ）などのガス絶縁電力機器、及びその異常検出方法に関する。 The present invention relates to a gas insulated power device using, for example, SF 6 gas or a mixed gas containing SF 6 gas as a main insulating medium or arc extinguishing medium, for example, a gas insulated switchgear (GIS), a gas circuit breaker (GCB) ), Cubicle-type gas switchgear (C-GIS), gas-insulated transformer, gas-insulated power equipment such as a pipe air-gas-insulated transmission line (GIL), and an abnormality detection method thereof.

ガス絶縁電力機器は大気圧以上の絶縁ガスを絶縁媒体に使用するため、電気回路となる高電圧中心導体（主回路）を固体支持絶縁物（スペーサ）とともに金属製の接地タンク（機器外被）内に格納し、密閉構造を成している。そのため、外部環境の影響を受けない、機器のコンパクト化を図れる、保守面で安全であるなど種々の利点を有し、わが国では極めて多用されている。反面、機器外部からは内部の状態を監視しにくく、万一、主回路の導通や機器絶縁に異常が発生しても、その異常を検出しにくいとの問題がある。そこで、機器の内部の状態、特に絶縁性能を外部から検出する技術の開発が強く求められている。   Since gas-insulated power equipment uses an insulating gas above atmospheric pressure as an insulating medium, a high-voltage central conductor (main circuit) that becomes an electric circuit is used together with a solid support insulator (spacer) and a metal ground tank (equipment jacket) It is housed inside and has a sealed structure. Therefore, it has various advantages such as being unaffected by the external environment, being able to reduce the size of the device, and being safe in terms of maintenance, and is extremely frequently used in Japan. On the other hand, there is a problem that it is difficult to monitor the internal state from the outside of the device, and even if an abnormality occurs in the conduction of the main circuit or the device insulation, it is difficult to detect the abnormality. Therefore, there is a strong demand for the development of technology for detecting the internal state of equipment, particularly the insulation performance from the outside.

例えば、ガス絶縁開閉装置内でコロナ放電が発生すると電磁波が放射されることから、この電磁波を受信することでコロナ放電を検出する絶縁異常検出装置がある（特開平０１−２３５８６５号公報）。この絶縁異常検出装置では、コロナ放電により生じる電磁波に対して受信感度が高い位置にコロナ放電検出用アンテナを配置すると共に、コロナ放電により生じる電磁波に対して受信感度が十分低い位置にノイズ検出用アンテナを配置し、コロナ放電検出用アンテナで受信された信号とノイズ検出用アンテナで受信された信号の差をとることにより、コロナ放電信号のみを取り出し異常を検出している。   For example, when a corona discharge occurs in a gas insulated switchgear, an electromagnetic wave is radiated. Therefore, there is an insulation abnormality detection device that detects the corona discharge by receiving this electromagnetic wave (Japanese Patent Laid-Open No. 01-235865). In this insulation abnormality detection device, the antenna for detecting the corona discharge is disposed at a position where the reception sensitivity is high with respect to the electromagnetic wave generated by the corona discharge, and the noise detection antenna is disposed at a position where the reception sensitivity is sufficiently low with respect to the electromagnetic wave generated by the corona discharge. , And taking the difference between the signal received by the corona discharge detection antenna and the signal received by the noise detection antenna, only the corona discharge signal is extracted to detect an abnormality.

また、異常に起因した音を検出する部分放電検出装置がある（特開平５−４５４０２号公報）。この部分放電検出装置では、電気機器を収容する密閉容器にＡＥ（アコースティック・エミッション）センサを取り付け、ＡＥセンサの出力をバンドパスフィルタ、プリアンプに入力している。ＡＥセンサは、部分放電により発生するＡＥ波の周波数スペクトルの強度が最大となる周波数に共振する特性を有しており、部分放電発生時に生じる音波を電気信号に変換する。この電気信号のうちＡＥセンサの共振周波数を中心としてプリアンプの内部雑音が最小となる周波数領域の電気信号だけをバンドパスフィルタで通過させ、外部からのノイズを除去して部分放電を検出するようにしている。   There is also a partial discharge detection device that detects sound caused by an abnormality (Japanese Patent Laid-Open No. 5-45402). In this partial discharge detection device, an AE (acoustic emission) sensor is attached to a sealed container that houses electrical equipment, and the output of the AE sensor is input to a band-pass filter and a preamplifier. The AE sensor has a characteristic of resonating at a frequency at which the intensity of the frequency spectrum of the AE wave generated by the partial discharge is maximized, and converts sound waves generated when the partial discharge is generated into an electric signal. Of these electrical signals, only the electrical signal in the frequency region where the internal noise of the preamplifier is minimized with the resonance frequency of the AE sensor as the center is passed through the bandpass filter, and the external discharge is removed to detect the partial discharge. ing.

さらに、通電異常や絶縁異常に伴う部分放電あるいはアーク放電によってＳＦ６ガスから分解生成された各種の派生ガス（以下、分解ガスという）を化学的に検出する放電検出装置がある（特開昭５０−１２９９３８号公報）。この放電検出装置では、ＳＦ６を充満させたガス絶縁電気装置の密封容器の内部に、分解ガスと反応して抵抗値が低下するガラスエポキシ積層基板からなる検出素子を配置し、検出素子の抵抗値を監視する。放電が発生すると、ＳＦ６が分解して活性ガスが生成され、検出素子がＳＦ６分解生成ガスと反応するため、検出素子の抵抗値の低下を測定することにより放電を検出することができる。 Furthermore, there is a discharge detection device that chemically detects various derived gases (hereinafter referred to as decomposition gas) decomposed and generated from SF 6 gas by partial discharge or arc discharge due to abnormality in energization or insulation (Japanese Patent Laid-Open No. Sho 50). -129938). In this discharge detection device, a detection element made of a glass epoxy laminated substrate whose resistance value is reduced by reacting with decomposition gas is disposed inside a sealed container of a gas-insulated electric apparatus filled with SF 6 , and the resistance of the detection element Monitor the value. When discharge occurs, SF 6 is decomposed to generate active gas, and the detection element reacts with the SF 6 decomposition product gas. Therefore, the discharge can be detected by measuring the decrease in the resistance value of the detection element.

しかしながら、上述の異常発生に伴う電磁波をアンテナで受信して異常を検出する手法や、異常発生に伴うＡＥ波をＡＥセンサによって感知して異常を検出する手法は、ガス絶縁機器が設置されている変電所などの環境下では背景雑音の存在によってその性能を十分に発揮できていない。なぜなら、異常の検出感度を高めるために受信感度・センサ感度を高めても、背景雑音をも検出することになり、異常を示す真の情報と背景雑音の識別（いわゆるＳ／Ｎ比）を高めることは極めて困難だからである。ここで、上述の異常発生に伴う電磁波をアンテナで受信して異常を検出する絶縁異常検出装置では、ノイズ検出用アンテナを設けることで背景雑音のキャンセルを図っているが、コロナ放電検出用アンテナが設けられている場所の背景雑音を計測しているわけではないので、背景雑音の影響を完全に排除することはできないと考えられる。   However, a gas insulating device is installed in the method of detecting an abnormality by receiving an electromagnetic wave accompanying the occurrence of the abnormality with the antenna and the method of detecting an abnormality by detecting an AE wave accompanying the occurrence of the abnormality with an AE sensor. Under the environment of substations, the performance is not fully demonstrated due to the presence of background noise. This is because even if the reception sensitivity / sensor sensitivity is increased in order to increase the detection sensitivity of the abnormality, the background noise is also detected, and the discrimination between the true information indicating the abnormality and the background noise (so-called S / N ratio) is increased. This is extremely difficult. Here, in the insulation abnormality detection device that detects the abnormality by receiving the electromagnetic wave accompanying the occurrence of the abnormality with the antenna, the background noise is canceled by providing the noise detection antenna. Since the background noise of the place where it is provided is not measured, it is considered that the influence of the background noise cannot be completely eliminated.

この点、分解ガスを化学的に検出する手法はこのような背景雑音の問題はなく、しかも、部分放電などの異常が極めて軽微であっても、ＳＦ６ガスの分解ガスは通常蓄積されるため、次第に濃度が増えて検出が容易となる利点がある。ところが、ＳＦ６ガスの分解ガスの多くは金属を腐食するなど、機器に有害な影響を与えるものが多いため、通常は機器の内部に分解ガスを吸着・除去するための吸着材が封入され、機器に有害な影響を与えない程度の濃度に抑えるようにしている。 In this regard, a technique for detecting a decomposed gas chemically is no problem of such background noise, moreover, even an extremely small abnormalities such as partial discharge, because decomposition gas of SF 6 gas that is normally accumulated There is an advantage that the concentration gradually increases and the detection becomes easy. However, since many of the decomposition gases of SF 6 gas corrode metals, and many of them have harmful effects on the equipment, usually an adsorbent for adsorbing and removing the decomposition gas is sealed inside the equipment, The concentration is set to a level that does not adversely affect the equipment.

特開平０１−２３５８６５号Japanese Patent Laid-Open No. 01-235865 特開平５−４５４０２号JP-A-5-45402 特開昭５０−１２９９３８号JP 50-129938 A

このように、ガス絶縁電力機器では、機器内部に分解ガスを吸着する吸着材が封入されているため、通電異常あるいは絶縁異常等をＳＦ６ガスの分解ガスに基づいて検出しようとしても、検出素子等のセンサ類によって分解ガスを検出する前に分解ガスが吸着材に吸着されてしまい、分解ガスを良好に検出することができず、その実用化が難しい。つまり、吸着材に接触した後のガスに基づいてガス中の分解ガスを検出するので、分解ガスの検出感度に劣り、異常発生を良好に検出することが困難である。 As described above, in the gas-insulated power device, since the adsorbent that adsorbs the decomposition gas is enclosed in the device, even if it is attempted to detect an energization abnormality or an insulation abnormality based on the decomposition gas of SF 6 gas, the detection element The cracked gas is adsorbed by the adsorbent before the cracked gas is detected by sensors such as the above, so that the cracked gas cannot be detected well, and its practical use is difficult. That is, since the cracked gas in the gas is detected based on the gas after coming into contact with the adsorbent, the detection sensitivity of the cracked gas is inferior, and it is difficult to detect abnormal occurrences well.

本発明は、内部の異常を高感度に検出することができるガス絶縁電力機器及びその異常検出方法を提供することを目的とする。   An object of the present invention is to provide a gas-insulated power apparatus and an abnormality detection method capable of detecting an internal abnormality with high sensitivity.

かかる目的を達成するために請求項１記載の発明は、絶縁ガスが封入された接地タンク内に導体を電気的に絶縁した状態で収容すると共に、接地タンク内で発生した絶縁ガスの分解ガスを吸着材によって吸着除去するガス絶縁電力機器において、吸着材を接地タンクとは別の密閉容器に収容すると共に、密閉容器を接地タンクに接続して密閉容器内と接地タンク内とを連通させ、接地タンクから吸着材に至るまでの間の連通路に、分解ガスとの接触によって変色する薬剤と、外部からの薬剤の視認を可能にする覗き部とを備えるものである。   In order to achieve this object, the invention according to claim 1 is characterized in that the conductor is electrically insulated in a grounded tank filled with an insulating gas and the decomposition gas of the insulating gas generated in the grounded tank is contained. In gas-insulated power equipment that adsorbs and removes with an adsorbent, the adsorbent is housed in a closed container separate from the ground tank, and the closed container is connected to the ground tank so that the inside of the sealed container and the ground tank communicate with each other. The communication path from the tank to the adsorbent is provided with a drug that changes color due to contact with the cracked gas and a peeping part that allows the drug to be visually recognized from the outside.

接地タンク内で通電異常や絶縁異常等の異常が発生すると、絶縁ガスから分解ガスが発生し、分解ガスの濃度が増加する。接地タンク内と密閉容器内とは連通されており、接地タンク内で発生した分解ガスは密閉容器内へと自然拡散し又は強制循環され、密閉容器内で吸着材によって吸着除去される。このため、接地タンク内の分解ガスの濃度が減少する。また、接地タンクから吸着材に至るまでの間の連通路には分解ガスとの接触によって変色する薬剤が設けられており、接地タンク内で発生した分解ガスは密閉容器内に到達する前に薬剤に接触してこれを変色させる。即ち、吸着材に接触する前の状態で分解ガスをより多く含むガスを薬剤に接触させることができる。薬剤の変色は覗き部を通じて外部から視認することができる。   When an abnormality such as energization abnormality or insulation abnormality occurs in the ground tank, decomposition gas is generated from the insulating gas, and the concentration of the decomposition gas increases. The ground tank and the sealed container are in communication with each other, and the decomposition gas generated in the ground tank is naturally diffused or forcedly circulated into the sealed container, and is adsorbed and removed by the adsorbent in the sealed container. For this reason, the density | concentration of the decomposition gas in a ground tank reduces. In addition, the communication path from the ground tank to the adsorbent is provided with a chemical that changes color by contact with the cracked gas, and the cracked gas generated in the grounded tank is filled with the chemical before reaching the sealed container. Touch this to discolor it. That is, a gas containing a larger amount of decomposition gas can be brought into contact with the drug in a state before contacting the adsorbent. The discoloration of the medicine can be visually recognized from the outside through the peeping portion.

また、請求項２記載のガス絶縁電力機器は、
密閉容器が接地タンクから切り離し可能であり、密閉容器を切り離す場合に接地タンク側連通路を閉じる第１の開閉弁を備えるものである。したがって、密閉容器を切り離す場合、第１の開閉弁によって接地タンク側連通路を閉じることで接地タンク内の気密性を維持できる。つまり、接地タンク内の気密性を維持しながら吸着材を取り出すことができる。 Further, the gas insulated power device according to claim 2 is:
The sealed container can be separated from the ground tank, and includes a first on-off valve that closes the ground tank side communication path when the sealed container is separated. Therefore, when the sealed container is separated, the airtightness in the ground tank can be maintained by closing the ground tank side communication path using the first on-off valve. That is, the adsorbent can be taken out while maintaining the airtightness in the ground tank.

また、請求項３記載のガス絶縁電力機器は、密閉容器を切り離す場合に密閉容器側連通路を閉じる第２の開閉弁を備えるものである。したがって、密閉容器を切り離す場合、第２の開閉弁によって密閉容器側連通路を閉じることで密閉容器内の気密性を維持できる。   According to a third aspect of the present invention, there is provided a gas insulated power device including a second on-off valve that closes the sealed container side communication path when the sealed container is separated. Therefore, when the sealed container is separated, the hermeticity in the sealed container can be maintained by closing the sealed container side communication path using the second on-off valve.

また、請求項４記載のガス絶縁電力機器は、接地タンク内と密閉容器内とを連通する連通路が往路と復路とを有する循環路であり、薬剤及び覗き部は往路に設けられており、接地タンク内のガスを往路から密閉容器内に導いて復路から接地タンクへと循環させる循環装置を備えるものである。したがって、循環装置は循環路内にガスの強制的な流れを形成する。接地タンク内のガスは、接地タンク→往路→密閉容器→復路→接地タンクへと循環される。このガスの流れに乗って分解ガスも流れ、往路に設けられた薬剤に接触してこれを変色させた後、密閉容器内で吸着材に接触し吸着除去される。分解ガスが除去された残りのガスは復路を通って接地タンク内に戻される。   The gas-insulated power device according to claim 4 is a circulation path in which the communication path that connects the inside of the ground tank and the inside of the sealed container has a forward path and a return path, and the medicine and the peeping portion are provided in the forward path. A circulation device is provided that guides the gas in the ground tank from the forward path into the sealed container and circulates it from the return path to the ground tank. Therefore, the circulation device forms a forced flow of gas in the circulation path. The gas in the grounded tank is circulated from the grounded tank to the forward path → the sealed container → the return path → the grounded tank. The decomposition gas also flows along with this gas flow, contacts the drug provided in the outward path and discolors it, then contacts the adsorbent in the sealed container and is removed by adsorption. The remaining gas from which the cracked gas has been removed is returned to the ground tank through the return path.

また、請求項５記載のガス絶縁電力機器の異常検出方法は、絶縁ガスが封入されている接地タンク内で発生した分解ガスを吸着する吸着材を接地タンクとは別の密閉容器に収容すると共に、密閉容器内と接地タンク内とを連通し、分解ガスを密閉容器内に導いて吸着材によって吸着除去すると共に、接地タンクから吸着材に至るまでの間の連通路に分解ガスとの接触によって変色する薬剤を配置し、薬剤の変色によって接地タンク内での異常の発生を検出するものである。   According to a fifth aspect of the present invention, there is provided a method for detecting an abnormality of a gas-insulated power device, wherein an adsorbent that adsorbs a decomposition gas generated in a grounded tank in which insulating gas is sealed is housed in a sealed container separate from the grounded tank. The inside of the sealed container communicates with the inside of the grounded tank, the cracked gas is guided into the sealed container and is adsorbed and removed by the adsorbent, and the contact path between the grounded tank and the adsorbent is brought into contact with the cracked gas. An agent that discolors is placed, and the occurrence of an abnormality in the ground tank is detected by the discoloration of the agent.

接地タンク内で通電異常や絶縁異常等の異常が発生すると、絶縁ガスから分解ガスが発生し、分解ガスの濃度が増加する。接地タンク内と密閉容器内とは連通されており、接地タンク内で発生した分解ガスは密閉容器内へと自然拡散し又は強制循環され、密閉容器内で吸着材によって吸着除去される。このため、接地タンク内の分解ガスの濃度は減少する。また、接地タンクから吸着材に至るまでの間の連通路には分解ガスとの接触によって変色する薬剤が設けられており、接地タンク内で発生した分解ガスは密閉容器内に到達する前に薬剤に接触してこれを変色させる。即ち、吸着材に接触する前の状態で分解ガスをより多く含むガスを薬剤に接触させることができる。薬剤の変色は、例えば外部から薬剤の視認が可能な覗き部を設けておくことで確認できる。   When an abnormality such as energization abnormality or insulation abnormality occurs in the ground tank, decomposition gas is generated from the insulating gas, and the concentration of the decomposition gas increases. The ground tank and the sealed container are in communication with each other, and the decomposition gas generated in the ground tank is naturally diffused or forcedly circulated into the sealed container, and is adsorbed and removed by the adsorbent in the sealed container. For this reason, the density | concentration of the decomposition gas in a ground tank reduces. In addition, the communication path from the ground tank to the adsorbent is provided with a chemical that changes color by contact with the cracked gas, and the cracked gas generated in the grounded tank is filled with the chemical before reaching the sealed container. Touch this to discolor it. That is, a gas containing a larger amount of decomposition gas can be brought into contact with the drug in a state before contacting the adsorbent. The discoloration of the medicine can be confirmed, for example, by providing a peeping part that can visually recognize the medicine from the outside.

さらに、請求項６記載のガス絶縁電力機器の異常検出方法は、接地タンク内と密閉容器内とを連通する連通路を往路と復路とを有する循環路にすると共に、循環装置によって接地タンク内のガスを往路から密閉容器内に導いて復路から接地タンク内へと循環させるものである。したがって、接地タンク内のガスを接地タンク→往路→密閉容器→復路→接地タンクへと強制的に循環させて薬剤に接触させることができる。   The abnormality detection method for a gas-insulated power device according to claim 6 is characterized in that the communication path that connects the inside of the ground tank and the inside of the sealed container is a circulation path having an outward path and a return path, and The gas is led from the forward path into the sealed container and circulated from the return path into the ground tank. Therefore, the gas in the ground tank can be forced to circulate from the ground tank to the forward path → the sealed container → the return path → the ground tank and contact the drug.

請求項１記載のガス絶縁電力機器では、吸着材を接地タンクとは別の密閉容器に収容すると共に、密閉容器を接地タンクに接続して密閉容器内と接地タンク内とを連通させ、接地タンクから吸着材に至るまでの間の連通路に、分解ガスとの接触によって変色する薬剤と、外部からの前記薬剤の視認を可能にする覗き部とを備えているので、接地タンク内で発生した分解ガスを密閉容器内の吸着材で吸着除去しながら薬剤の変色によって接地タンク内で発生した異常を検出することができる。また、吸着材に触れる前のガス、即ち分解ガスが吸着除去される前のガスを薬剤に接触させることができるので、吸着材を接地タンク内に配置する場合に比べて分解ガスの検出感度を向上させることができ、接地タンク内の異常発生をより確実に検出することができる。   In the gas insulated power device according to claim 1, the adsorbent is housed in a sealed container different from the ground tank, and the sealed container is connected to the ground tank so that the sealed container and the ground tank communicate with each other. Since it has a medicine that changes color by contact with the decomposition gas and a peeping part that allows the medicine to be visually recognized from the outside, the communication path from to the adsorbent is generated in the ground tank. While the decomposed gas is adsorbed and removed by the adsorbent in the sealed container, it is possible to detect an abnormality occurring in the ground tank due to the discoloration of the medicine. In addition, since the gas before touching the adsorbent, that is, the gas before the decomposition gas is adsorbed and removed, can be brought into contact with the drug, the detection sensitivity of the cracked gas can be improved compared to the case where the adsorbent is placed in the ground tank. The occurrence of abnormality in the ground tank can be detected more reliably.

また、請求項２記載のガス絶縁電力機器では、密閉容器が接地タンクから切り離し可能であり、密閉容器を切り離す場合に接地タンク側連通路を閉じる第１の開閉弁を備えているので、接地タンク内を大気に開放することなく密閉容器を切り離して吸着材を取り出すことができ、ガス絶縁電力機器の運転を止めずに吸着材を取り出したり交換することができる。また、万一、密閉容器に何らかの不具合が生じたとしても、密閉容器ごと交換することができる。   Further, in the gas insulated power device according to claim 2, since the sealed container is separable from the ground tank, and the first on-off valve is provided to close the ground tank side communication path when the sealed container is separated, the ground tank The adsorbent can be taken out by separating the sealed container without opening the inside to the atmosphere, and the adsorbent can be taken out or replaced without stopping the operation of the gas-insulated power device. Moreover, even if some trouble occurs in the sealed container, the entire sealed container can be replaced.

また、請求項３記載のガス絶縁電力機器では、密閉容器を切り離す場合に密閉容器側連通路を閉じる第２の開閉弁を備えているので、密閉容器を密閉したまま接地タンクから切り離すことができる。このため、吸着材を大気に接触させずに運搬することができ、そのままの状態で吸着材を分析にかけることができる。   Further, in the gas insulated power device according to the third aspect, since the second opening / closing valve for closing the closed container side communication path is provided when the closed container is cut off, the closed container can be cut off from the ground tank while being closed. . For this reason, the adsorbent can be transported without being brought into contact with the atmosphere, and the adsorbent can be subjected to analysis as it is.

また、請求項４記載のガス絶縁電力機器では、接地タンク内と密閉容器内とを連通する連通路は往路と復路とを有する循環路であり、薬剤及び覗き部は往路に設けられており、接地タンク内のガスを往路から密閉容器に導いて復路から接地タンクへと循環させる循環装置を備えているので、接地タンク内のガスを強制的に循環させることができ、分解ガスを効率的に薬剤に接触させることができると共に、吸着材によって吸着除去することができる。   Further, in the gas-insulated power device according to claim 4, the communication path that connects the inside of the ground tank and the inside of the sealed container is a circulation path having a forward path and a return path, and the medicine and the peeping portion are provided in the forward path, Since it has a circulation device that guides the gas in the ground tank from the forward path to the sealed container and circulates it from the return path to the ground tank, the gas in the ground tank can be forcibly circulated, and the decomposition gas can be efficiently circulated. While being able to contact a chemical | medical agent, it can adsorb and remove with an adsorbent.

また、請求項５記載のガス絶縁電力機器の異常検出方法では、絶縁ガスが封入されている接地タンク内で発生した分解ガスを吸着する吸着材を接地タンクとは別の密閉容器に収容すると共に、密閉容器内と接地タンク内とを連通し、分解ガスを密閉容器内に導いて吸着材によって吸着除去すると共に、接地タンクから吸着材に至るまでの間の連通路に分解ガスとの接触によって変色する薬剤を配置し、薬剤の変色によって接地タンク内での異常の発生を検出するようにしているので、接地タンク内で発生した分解ガスを吸着除去しながら、薬剤の変色によって接地タンク内の異常を検出することができる。また、吸着材に接する前の状態で分解ガスをより多く含むガスを薬剤に接触させることができるので、吸着材を接地タンク内に配置して分解ガスを吸着除去する場合と比べて分解ガスの検出感度を向上させることができ、接地タンク内の異常発生をより確実に検出することができる。   In the abnormality detection method for a gas-insulated power device according to claim 5, the adsorbent that adsorbs the decomposition gas generated in the ground tank in which the insulation gas is sealed is housed in a sealed container separate from the ground tank. The inside of the sealed container communicates with the inside of the grounded tank, the cracked gas is guided into the sealed container and is adsorbed and removed by the adsorbent, and the contact path between the grounded tank and the adsorbent is brought into contact with the cracked gas. Since the discoloration medicine is arranged and the occurrence of abnormality in the ground tank is detected by the discoloration of the medicine, the decomposition gas generated in the ground tank is adsorbed and removed, and the discoloration of the medicine Abnormalities can be detected. In addition, since the gas containing a larger amount of the cracked gas can be brought into contact with the drug in the state before coming into contact with the adsorbent, the decomposition gas can be removed compared with the case where the adsorbent is disposed in the ground tank and the cracked gas is adsorbed and removed. The detection sensitivity can be improved, and the occurrence of an abnormality in the ground tank can be detected more reliably.

さらに、請求項６記載のガス絶縁電力機器の異常検出方法では、接地タンク内と密閉容器内とを連通する連通路を往路と復路とを有する循環路にすると共に、循環装置によって接地タンク内のガスを往路から密閉容器内に導いて復路から接地タンク内へと循環させるので、接地タンク内のガスを密閉容器へと強制的に循環させることができる。このため、発生した分解ガスが薬剤に接触するまでの時間を短縮することができ、異常の発生を素早く検出することができると共に、接地タンク内に分解ガスが残留するのをより確実に防止できる。   Furthermore, in the abnormality detection method for a gas-insulated power device according to claim 6, the communication path connecting the inside of the ground tank and the inside of the sealed container is a circulation path having an outward path and a return path, and the circulation device Since the gas is guided from the forward path into the sealed container and circulated from the return path into the grounded tank, the gas in the grounded tank can be forcibly circulated to the sealed container. For this reason, it is possible to shorten the time until the generated decomposed gas comes into contact with the medicine, to quickly detect the occurrence of abnormality, and to more reliably prevent the decomposed gas from remaining in the ground tank. .

以下、本発明の構成を図面に示す最良の形態に基づいて詳細に説明する。   Hereinafter, the configuration of the present invention will be described in detail based on the best mode shown in the drawings.

図１及び図２に本発明のガス絶縁電力機器の第１の実施形態を示す。このガス絶縁電力機器は、絶縁ガス１が封入された接地タンク２内に導体３を電気的に絶縁した状態で収容すると共に、接地タンク２内で発生した絶縁ガス１の分解ガスを吸着材４によって吸着除去するものである。そして、吸着材４を接地タンク２とは別の密閉容器５に収容すると共に、密閉容器５を接地タンク２に接続して密閉容器５内と接地タンク２内とを連通させ、接地タンク２から吸着材４に至るまでの間の連通路９に、分解ガスとの接触によって変色する薬剤３５と、外部からの薬剤３５の視認を可能にする覗き部３８とを備えている。本実施形態では、密閉容器５は接地タンク２から切り離し可能であり、密閉容器５を切り離す場合に接地タンク側連通路２８を閉じる第１の開閉弁を備えている。また、連通路９は密閉容器側連通路１０と接地タンク側連通路２８より構成されている。   1 and 2 show a first embodiment of a gas-insulated power apparatus according to the present invention. This gas-insulated power device accommodates a conductor 3 in a grounded tank 2 in which an insulating gas 1 is sealed in an electrically insulated state, and adsorbs a decomposition gas of the insulating gas 1 generated in the grounded tank 2. Is removed by adsorption. The adsorbent 4 is accommodated in a sealed container 5 separate from the ground tank 2, and the sealed container 5 is connected to the ground tank 2 so that the sealed container 5 communicates with the ground tank 2. The communication path 9 up to the adsorbent 4 is provided with a drug 35 that changes color due to contact with the decomposition gas and a peeping part 38 that enables the drug 35 to be visually recognized from the outside. In the present embodiment, the sealed container 5 can be separated from the ground tank 2 and includes a first on-off valve that closes the ground tank side communication path 28 when the sealed container 5 is detached. The communication path 9 is composed of a closed container side communication path 10 and a ground tank side communication path 28.

導体（主回路）３は、例えば高電圧中心導体で、例えば円筒形状を成している。導体３は、例えば円筒形状を成す接地タンク（機器外被）２の中心位置に配置され、支持絶縁物（スペーサ）８によって支持されている。絶縁ガス１は、例えばＳＦ６ガス、ＳＦ６ガスを含む混合ガス等である。ただし、これらのガスに限るものではなく、例えばＮ２ガス，ＣＯ２ガス，Ｃ３Ｆ８ガス，ｃ−Ｃ４Ｆ８ガス，ＣＦ３Ｉガス，ＣＦ４ガスおよびこれらの混合ガス等でも良い。 The conductor (main circuit) 3 is, for example, a high-voltage center conductor and has, for example, a cylindrical shape. The conductor 3 is arranged at the center position of a ground tank (equipment jacket) 2 having a cylindrical shape, for example, and is supported by a support insulator (spacer) 8. Insulating gas 1 is, for example, SF 6 gas, mixed gas containing SF 6 gas. However, the gas is not limited to these gases, and for example, N 2 gas, CO 2 gas, C 3 F 8 gas, c-C 4 F 8 gas, CF 3 I gas, CF 4 gas, and a mixed gas thereof may be used. .

接地タンク２は、例えばＧＩＳの接地タンクである。ただし、ＧＩＳの接地タンクに限るものではなく、ＧＣＢの接地タンク、Ｃ−ＧＩＳの接地タンク、ガス絶縁変圧器の接地タンク、ＧＩＬの接地タンク等であっても良い。   The ground tank 2 is, for example, a GIS ground tank. However, the ground tank is not limited to a GIS, but may be a ground tank of GCB, a ground tank of C-GIS, a ground tank of a gas insulation transformer, a ground tank of GIL, or the like.

接地タンク２には、内部の真空引き及び絶縁ガス１の封入に使用する給排気管（ガス配管）６と、この給排気管６を開閉する開閉弁７が設けられている。本実施形態では、接地タンク側連通路２８は接地タンク２の給排気管６であり、第１の開閉弁は給排気管６に設けられた開閉弁７である。つまり、接地タンク２に通常設けられている既存の給排気管６と開閉弁７を利用している。このため、密閉容器５の取り付けが容易である。また、既存の接地タンク２の設計変更を行わずにそのまま密閉容器５を取り付けることができ、特に、既に設置され運転されているガス絶縁電力機器に対しても後付けすることができる。さらに、後付けした密閉容器５を取り外すことでガス絶縁電力機器を元の状態に戻すことができる。なお、既に設置され運転されているガス絶縁電力機器に適用する場合には、接地タンク２内に設けられている吸着材を撤去しておく。   The ground tank 2 is provided with an air supply / exhaust pipe (gas pipe) 6 used for evacuating the inside and sealing the insulating gas 1 and an opening / closing valve 7 for opening and closing the air supply / exhaust pipe 6. In the present embodiment, the ground tank side communication path 28 is the supply / exhaust pipe 6 of the ground tank 2, and the first on-off valve is the on-off valve 7 provided on the supply / exhaust pipe 6. That is, the existing air supply / exhaust pipe 6 and on-off valve 7 normally provided in the ground tank 2 are used. For this reason, attachment of the airtight container 5 is easy. Further, the sealed container 5 can be attached as it is without changing the design of the existing grounded tank 2, and in particular, it can be retrofitted to gas-insulated power equipment that has already been installed and operated. Furthermore, the gas-insulated power device can be returned to its original state by removing the airtight container 5 attached later. In addition, when applying to the gas-insulated electric power apparatus already installed and operated, the adsorbent provided in the ground tank 2 is removed.

ただし、必ずしも接地タンク側連通路２８として、接地タンク２に既存の給排気管６を利用する必要はなく、給排気管６とは別に接地タンク側連通路２８を設けても良い。   However, it is not always necessary to use the existing supply / exhaust pipe 6 for the ground tank 2 as the ground tank side communication path 28, and the ground tank side communication path 28 may be provided separately from the supply / exhaust pipe 6.

密閉容器５には、密閉容器側連通路１０と、密閉容器５を切り離す場合に密閉容器側連通路１０を閉じる第２の開閉弁１１が設けられている。密閉容器側連通路１０は接地タンク側連通路２８に接続されている。密閉容器側連通路１０と接地タンク側連通路２８とは、互いのフランジ１０ａ，６ａを突き合わせてボルトによって固定することで切り離し可能に接続されている。   The hermetic container 5 is provided with a hermetic container side communication path 10 and a second on-off valve 11 that closes the hermetic container side communication path 10 when the hermetic container 5 is separated. The closed container side communication path 10 is connected to the ground tank side communication path 28. The sealed container side communication path 10 and the ground tank side communication path 28 are detachably connected by abutting each other's flanges 10a and 6a and fixing them with bolts.

薬剤３５はガス検知管３６に充填されている薬剤３５である。即ち、本実施形態では、ガス検知管３６を密閉容器側連通路１０の途中に設けることで、ガス検知管３６自体を密閉容器側連通路１０の一部とし、ガス検知管３６内に充填されている薬剤３５を密閉容器側連通路１０内に配置する。ガス検知管３６内には、接地タンク２内で発生した分解ガスが自然拡散によって密閉容器５内に到達できる程度の流路が少なくとも確保されている。即ち、一般的なガス検知管の場合、内部には高密度に薬剤が充填されており、手動のポンプ等を使用して強制的にガス検知管の中に被検査ガスを通過させる必要がある。しかしながら、本実施形態のガス検知管３６は薬剤３５の充填率が低く、接地タンク２内で発生した分解ガスが自然拡散によって密閉容器５内に到達できる程度の流路が少なくとも確保されている。なお、一般的なガス検知管の場合、手動ポンプ等を使用して強制的に管の中に被検査ガスを通過させ、短時間に薬剤の呈色反応を起こさせ、その変化した量によりガスの濃度を明らかにする。これに対し、本発明では分解ガスを検出できれば良く、濃度の定量化までは不要である。このため、薬剤３５を変色させることができれば十分である。薬剤３５は連通路９内のガスに曝されており、しかも長期にわたって曝され続けるので、薬剤３５の呈色反応は十分に起きる。   The medicine 35 is the medicine 35 filled in the gas detection tube 36. That is, in the present embodiment, the gas detection pipe 36 is provided in the middle of the closed container side communication path 10 so that the gas detection pipe 36 itself becomes a part of the closed container side communication path 10 and is filled in the gas detection pipe 36. The medicine 35 is disposed in the closed container side communication path 10. In the gas detection pipe 36, at least a flow path is secured so that the decomposition gas generated in the ground tank 2 can reach the sealed container 5 by natural diffusion. That is, in the case of a general gas detector tube, the inside is filled with a medicine at a high density, and it is necessary to forcibly pass the gas to be inspected into the gas detector tube using a manual pump or the like. . However, the gas detection tube 36 of the present embodiment has a low filling rate of the drug 35, and at least a flow path is secured so that the decomposition gas generated in the ground tank 2 can reach the sealed container 5 by natural diffusion. In the case of a general gas detection tube, the gas to be inspected is forcibly passed through the tube using a manual pump or the like, causing a color reaction of the drug in a short time, and the gas depending on the changed amount. Reveal the concentration of. On the other hand, in the present invention, it is only necessary to detect the cracked gas, and it is unnecessary to quantify the concentration. For this reason, it is sufficient if the medicine 35 can be discolored. Since the drug 35 is exposed to the gas in the communication path 9 and continues to be exposed for a long period of time, the color reaction of the drug 35 occurs sufficiently.

ガス検知管３６の外管は透明であり、薬剤３５の変色を外部から視認することができる。即ち、透明な外管が覗き部３８となっている。   The outer tube of the gas detection tube 36 is transparent, and the discoloration of the medicine 35 can be visually recognized from the outside. That is, the transparent outer tube serves as the peeping portion 38.

分解ガスとして、例えばＳＯ２，ＨＦ，Ｆ−，ＳＦ４，ＳＯＦ４，ＳＯＦ２，ＳＯ２Ｆ２，ＣＦ４等を検出する。ガス検知管は対象とする特定のガスだけではなく、その他各種のガス（妨害ガス）にも反応する。そのため、分解ガスとして様々なガスの発生が予想される場合、検出の感度を向上させるためにはガス検知管の使用は有利である。接地タンク２内で発生した分解ガスに感度の認められたガス検知管、即ち使用可能なガス検知管として確認されたものとして、例えば二酸化硫黄（ＳＯ２）検知管（光明理化学工業株式会社製）、フッ化水素（ＨＦ）検知管（光明理化学工業株式会社製）、一酸化炭素（ＣＯ）検知管（光明理化学工業株式会社製）、二酸化炭素（ＣＯ２）検知管（光明理化学工業株式会社製）、二硫化炭素（ＣＳ２）検知管（株式会社ガステック製）がある。即ち、これらのいずれか一つのガス検知管を選択して使用することができる。これらのガス検知管内に充填されている薬剤が、薬剤３５である。ただし、使用可能なガス検知管としては、これらに限るものではなく、接地タンク２内で発生した分解ガスに感度の認められるガス検知管であれば使用可能である。 For example, SO 2 , HF, F − , SF 4 , SOF 4 , SOF 2 , SO 2 F 2 , CF 4, etc. are detected as the cracked gas. The gas detector tube reacts not only to a specific gas of interest but also to various other gases (interfering gases). For this reason, when various gases are expected to be generated as the cracked gas, it is advantageous to use a gas detector tube in order to improve the detection sensitivity. For example, a sulfur dioxide (SO 2 ) detector tube (manufactured by Komyo Chemical Co., Ltd.), which has been confirmed as a gas detector tube that is sensitive to the cracked gas generated in the grounded tank 2, that is, a usable gas detector tube. , Hydrogen fluoride (HF) detector tube (manufactured by Komyo Chemical Co., Ltd.), carbon monoxide (CO) detector tube (manufactured by Komyo Chemical Co., Ltd.), carbon dioxide (CO 2 ) detector tube (manufactured by Komyo Chemical Co., Ltd.) ), Carbon disulfide (CS 2 ) detector tube (manufactured by Gastec Co., Ltd.). That is, any one of these gas detection tubes can be selected and used. The medicine filled in these gas detection tubes is the medicine 35. However, usable gas detector tubes are not limited to these, and any gas detector tube can be used as long as it is sensitive to the cracked gas generated in the ground tank 2.

薬剤３５を充填したガス検知管３６を密閉容器側連通路１０に設けることで、密閉容器５と一体したしたユニットして取り扱うことができるので、その扱いが容易である。ただし、接地タンク側連通路２８にガス検知管３６即ち薬剤３５を設けても良い。   Since the gas detection tube 36 filled with the medicine 35 is provided in the closed container side communication path 10, it can be handled as a unit integrated with the closed container 5, and therefore it is easy to handle. However, the gas detection pipe 36, that is, the medicine 35 may be provided in the ground tank side communication path 28.

また、接地タンク２から吸着材４に至るまでの間の連通路９には吸着材４に接する前のガスを採取する採取口１３が設けられている。本実施形態では、密閉容器５に採取口１３が設けられている。ただし、採取口１３を設ける位置は密閉容器５に限るものではなく、吸着材４に接する前のガスを採取できる位置であれば良い。採取口１３を密閉容器５に設けることで、採取口１３の設置が容易であると共に、一体化したユニットとして取り扱うことができるので、その扱いが容易である。採取口１３には開閉弁１４が設けられており、ガスを採取する時以外の時には採取口１３を閉じておき、接地タンク２内及び密閉容器５内の気密性を確保している。   A sampling port 13 is provided in the communication path 9 from the ground tank 2 to the adsorbent 4 to collect gas before coming into contact with the adsorbent 4. In the present embodiment, a sampling port 13 is provided in the sealed container 5. However, the position where the sampling port 13 is provided is not limited to the sealed container 5, and may be a position where the gas before contacting the adsorbent 4 can be sampled. By providing the sampling port 13 in the sealed container 5, the sampling port 13 can be easily installed and handled as an integrated unit, which is easy to handle. The sampling port 13 is provided with an opening / closing valve 14, and the sampling port 13 is closed at times other than when gas is sampled to ensure airtightness in the ground tank 2 and the sealed container 5.

ガス絶縁電力機器の運転時には、第１及び第２の開閉弁７，１１を開き、接地タンク２内と密閉容器５内とを連通させておく。また、開閉弁１４を閉じておく。接地タンク２内で通電異常や絶縁異常等の異常が発生すると、絶縁ガス１から分解ガスが発生し、分解ガスの濃度が増加する。接地タンク２内と密閉容器５内とは連通されており、分解ガスは自然に拡散して密閉容器５内に到達し、吸着材４によって吸着除去される。このため、接地タンク２内の分解ガスの濃度を減少させることができる。分解ガスの多くは金属を腐食させる腐食性ガスである。吸着材４によって分解ガスを吸着除去するので、接地タンク２や導体３等を腐食させる程には分解ガスの濃度は高くならず、これらの腐食を防止することができる。   During operation of the gas insulated power device, the first and second on-off valves 7 and 11 are opened to allow the inside of the ground tank 2 and the inside of the sealed container 5 to communicate with each other. Moreover, the on-off valve 14 is closed. When an abnormality such as an energization abnormality or an insulation abnormality occurs in the ground tank 2, a decomposition gas is generated from the insulating gas 1, and the concentration of the decomposition gas increases. The ground tank 2 and the sealed container 5 are in communication with each other, and the decomposition gas naturally diffuses to reach the sealed container 5 and is adsorbed and removed by the adsorbent 4. For this reason, the concentration of the cracked gas in the ground tank 2 can be reduced. Many of the cracked gases are corrosive gases that corrode metals. Since the decomposition gas is adsorbed and removed by the adsorbent 4, the concentration of the decomposition gas does not become so high that the ground tank 2, the conductor 3 and the like are corroded, and these corrosions can be prevented.

また、ガス検知管３６を吸着材４よりも接地タンク２側に設けており、吸着材４によって吸着される前に分解ガスを薬剤３５に接触させることができる。このため、より多くの分解ガスを薬剤３５に接触させることができる。また、薬剤３５を長期にわたってガスに曝しておくことができる。これらのため、分解ガスの検出感度を向上させることができ、接地タンク２内での異常発生をより迅速且つ容易に検出することができる。また、薬剤３５の変色は覗き部３８から確認することができるので、分解ガスを外部に採取しなくても分解ガスの発生、即ち異常の発生を検出することができる。このため、検出の為に煩雑な作業を行なう必要がなく簡便である。   Further, the gas detection pipe 36 is provided on the ground tank 2 side of the adsorbent 4 so that the decomposition gas can be brought into contact with the medicine 35 before being adsorbed by the adsorbent 4. For this reason, more decomposition gas can be brought into contact with the medicine 35. Moreover, the chemical | medical agent 35 can be exposed to gas over a long period of time. For these reasons, the detection sensitivity of the cracked gas can be improved, and the occurrence of abnormality in the ground tank 2 can be detected more quickly and easily. Further, since the discoloration of the medicine 35 can be confirmed from the peeping portion 38, generation of decomposition gas, that is, occurrence of abnormality can be detected without collecting the decomposition gas outside. For this reason, it is not necessary to perform complicated work for detection, and it is simple.

このように薬剤３５の変色により分解ガスを検出することができる。薬剤３５に変色が認められず、分解ガスの発生が認められない場合には、機器の健全性を直接証明することができる。   Thus, the decomposition gas can be detected by the discoloration of the medicine 35. When no discoloration is observed in the medicine 35 and no generation of decomposition gas is observed, the soundness of the device can be directly proved.

密閉容器５を接地タンク２から切り離す場合、第１の開閉弁７によって接地タンク側連通路２８を閉じることで接地タンク２内の気密性を維持できる。このため、ガス絶縁電力機器の運転を止めずに密閉容器５を切り離すことができ、吸着材４を取り出して交換や修理・再生を行うことができる。また、吸着材４自体を分析の対象にすることが可能になる。また、第２の開閉弁１１によって密閉容器側連通路１０を閉じることで密閉容器５内の気密性を維持することができ、密閉容器５内の吸着材４を外気に接触させることなく分析にかけることができる。   When the sealed container 5 is separated from the ground tank 2, the air tightness in the ground tank 2 can be maintained by closing the ground tank side communication path 28 using the first on-off valve 7. For this reason, the sealed container 5 can be separated without stopping the operation of the gas-insulated power device, and the adsorbent 4 can be taken out and replaced, repaired, or regenerated. Further, it becomes possible to make the adsorbent 4 itself an object of analysis. Moreover, the airtightness in the airtight container 5 can be maintained by closing the airtight container side communication path 10 with the second on-off valve 11, and the analysis can be performed without bringing the adsorbent 4 in the airtight container 5 into contact with the outside air. You can hang it.

このように、本発明のガス絶縁電力機器の異常検出方法は、絶縁ガス１が封入されている接地タンク２内で発生した分解ガスを吸着する吸着材４を接地タンク２とは別の密閉容器５に収容すると共に、密閉容器５内と接地タンク２内とを連通し、分解ガスを密閉容器５内に導いて吸着材４によって吸着除去すると共に、接地タンク２から吸着材４に至るまでの間の連通路９に分解ガスとの接触によって変色する薬剤３５を配置し、薬剤３５の変色によって接地タンク２内での異常の発生を検出するものである。   As described above, the abnormality detection method for the gas-insulated power device according to the present invention uses a sealed container separate from the ground tank 2 for the adsorbent 4 that adsorbs the decomposition gas generated in the ground tank 2 in which the insulating gas 1 is sealed. 5, communicates the inside of the sealed container 5 and the inside of the ground tank 2, introduces the decomposition gas into the sealed container 5, removes it by the adsorbent 4, and extends from the ground tank 2 to the adsorbent 4. The chemical | medical agent 35 which discolors by contact with decomposition gas is arrange | positioned in the communication path 9 between, and generation | occurrence | production of abnormality in the ground tank 2 is detected by discoloration of the chemical | medical agent 35.

また、接地タンク２内での異常発生を、吸着材４の分析によっても検出することもできる。即ち、接地タンク側連通路２８を閉じた状態で接地タンク２から密閉容器５を切り離し吸着材４を分析して接地タンク２内での異常の発生を検出することもできる。   Further, the occurrence of abnormality in the ground tank 2 can also be detected by analyzing the adsorbent 4. That is, it is possible to detect the occurrence of abnormality in the ground tank 2 by separating the sealed container 5 from the ground tank 2 and analyzing the adsorbent 4 while the ground tank side communication path 28 is closed.

密閉容器５内の吸着材４によって発生した分解ガスを吸着除去することで、吸着材４には分解ガスが蓄積されている。第１及び第２の開閉弁７，１１を閉じて密閉容器５を接地タンク２から切り離し、外気を遮断した状態で吸着材４を取り出して分析する。吸着材４の分析によって分解ガスを検出し、これによって接地タンク２内での異常発生を検出する。吸着材４には分解ガスが蓄積されているので、たとえ接地タンク２内の分解ガス濃度が低くても、分解ガスの検出は容易であり、接地タンク２内での異常発生を容易に検出することができる。   The decomposition gas is accumulated in the adsorbent 4 by adsorbing and removing the decomposition gas generated by the adsorbent 4 in the sealed container 5. The first and second on-off valves 7 and 11 are closed, the sealed container 5 is disconnected from the ground tank 2, and the adsorbent 4 is taken out and analyzed in a state where the outside air is shut off. The decomposition gas is detected by analyzing the adsorbent 4, thereby detecting the occurrence of abnormality in the ground tank 2. Since the decomposition gas is accumulated in the adsorbent 4, the detection of the decomposition gas is easy even if the concentration of the decomposition gas in the ground tank 2 is low, and the occurrence of an abnormality in the ground tank 2 is easily detected. be able to.

また、接地タンク２内の異常を採取口１３から採取したガスを分析することによっても検出することができる。採取口１３は吸着材４に接する前のガスを採取することができるので、分解ガスをより多く含んでおり、分解ガスの検出が容易である。   Further, an abnormality in the ground tank 2 can also be detected by analyzing the gas collected from the collection port 13. Since the collection port 13 can collect the gas before coming into contact with the adsorbent 4, it contains a larger amount of cracked gas, and the cracked gas can be easily detected.

なお、本実施形態では、薬剤３５の変色に基づいて分解ガスの検出を行なう他に、吸着材４に吸着されているガスを分析して分解ガスの検出を行なうことと、採取口１３から採取したガスを分析して分解ガスの検出行なうことを併用していたが、吸着材４に吸着されているガスを分析して分解ガスの検出を行なうことと、採取口１３から採取したガスを分析して分解ガスの検出行なうことのいずれか一方又は両方を行なわなくても良い。   In this embodiment, in addition to detecting the decomposition gas based on the discoloration of the medicine 35, the decomposition gas is detected by analyzing the gas adsorbed on the adsorbent 4, and the sample is collected from the sampling port 13. However, the analysis of the gas adsorbed by the adsorbent 4 and the detection of the decomposition gas, and the analysis of the gas collected from the sampling port 13 were performed. Thus, either or both of the detection of the cracked gas may not be performed.

また、接地タンク２から密閉容器５を切り離した場合に、吸着材４が外気に触れても良い場合等には、第２の開閉弁１１を省略しても良い。   In addition, when the sealed container 5 is separated from the ground tank 2, the second opening / closing valve 11 may be omitted when the adsorbent 4 may touch the outside air.

次に、本発明のガス絶縁電力機器の第２の実施形態を示す。このガス絶縁電力機器を図３に示す。なお、上述のガス絶縁電力機器の部材と同一の部材には同一の符号を付し、それらの説明は省略する。   Next, a second embodiment of the gas insulated power device of the present invention will be described. This gas insulated power device is shown in FIG. In addition, the same code | symbol is attached | subjected to the member same as the member of the above-mentioned gas insulated power apparatus, and those description is abbreviate | omitted.

このガス絶縁電力機器は、接地タンク２内と密閉容器５内とを連通する連通路９を往路１５と復路１６とを有する循環路にすると共に、薬剤３５及び覗き部３８は往路１５に設けられており、接地タンク２内のガスを往路１５から密閉容器５に導いて吸着材４に接触させた後、復路１６から接地タンク２へと循環させる循環装置２２を備えている。   In this gas insulated power device, the communication path 9 that communicates the inside of the ground tank 2 and the inside of the sealed container 5 is a circulation path having the forward path 15 and the return path 16, and the medicine 35 and the peeping portion 38 are provided in the forward path 15. A circulation device 22 is provided that circulates the gas in the ground tank 2 from the forward path 15 to the sealed container 5 to contact the adsorbent 4 and then circulates from the return path 16 to the ground tank 2.

このガス絶縁電力機器は、往路１５と復路１６を別々に設けた配管２５，２６，３２，３３によって構成している。配管２５，２６は、例えばハンドホールフランジ蓋２４に孔を設けて固着している。また、配管３２，３３は密閉容器５に固着している。配管３２は配管２５に、配管３３は配管２６にそれぞれ切り離し可能に接続されている。   This gas-insulated power device is constituted by pipes 25, 26, 32, and 33 in which an outward path 15 and a return path 16 are separately provided. For example, the pipes 25 and 26 are fixed by providing holes in the hand hole flange lid 24. The pipes 32 and 33 are fixed to the sealed container 5. The pipe 32 is connected to the pipe 25 and the pipe 33 is connected to the pipe 26 so as to be separable.

循環装置２２は例えば密閉容器５内の吸着材４よりも下流側の位置に設けられている。循環装置２２は、例えば図示しないモータによって駆動される電動ファンである。   The circulation device 22 is provided, for example, at a position downstream of the adsorbent 4 in the sealed container 5. The circulation device 22 is an electric fan driven by a motor (not shown), for example.

配管３２の途中にはガス検知管３６が設けられており、ガス検知管３６が往路１５の一部を構成している。これにより、ガス検知管３６内の薬剤３５が往路１５の途中に設けらる。本実施形態では循環装置２２を設けてガスを強制的に循環させるので、分解ガスを自然拡散させて吸着材４にまで到達させる場合に比べて、薬剤３５のガス検知管３６内への充填率を高めることができる。ただし、ガス検知管３６内には、接地タンク２内で発生した分解ガスを循環装置２２による強制循環によって密閉容器５内に到達させることができる程度の流路が少なくとも確保されている。   A gas detection pipe 36 is provided in the middle of the pipe 32, and the gas detection pipe 36 constitutes a part of the forward path 15. Thereby, the medicine 35 in the gas detection tube 36 is provided in the middle of the forward path 15. In the present embodiment, since the circulation device 22 is provided to forcibly circulate the gas, the filling rate of the medicine 35 into the gas detection tube 36 is compared with the case where the decomposition gas is naturally diffused and reaches the adsorbent 4. Can be increased. However, at least a flow path is secured in the gas detection pipe 36 so that the decomposition gas generated in the ground tank 2 can reach the sealed container 5 by forced circulation by the circulation device 22.

循環装置２２を始動させると、密閉容器５内の循環装置２２よりも上流側が負圧、下流側が正圧となり、強制的なガスの流れが形成される。接地タンク２内のガスは配管２５内に吸い込まれ、往路１５（配管２５→配管３２）→密閉容器５→復路１６（配管３３→配管２６）→接地タンク２へと強制的に循環される。接地タンク２内で発生した分解ガスはこの流れに乗って流れ、往路１５内で薬剤３５に接触してこれを変色させた後、密閉容器５内に到達して吸着材４に接して吸着除去される。   When the circulation device 22 is started, the upstream side of the circulation device 22 in the hermetic container 5 has a negative pressure and the downstream side has a positive pressure, and a forced gas flow is formed. The gas in the ground tank 2 is sucked into the pipe 25 and is forcedly circulated to the forward path 15 (pipe 25 → pipe 32) → the sealed container 5 → return path 16 (pipe 33 → pipe 26) → the ground tank 2. The cracked gas generated in the ground tank 2 flows along this flow, contacts the drug 35 in the forward path 15 and discolors it, reaches the inside of the sealed container 5 and contacts the adsorbent 4 for adsorption removal. Is done.

このように、連通路９を循環路とし、循環装置２２を設けて強制的にガスを循環させるので、分解ガスが自然拡散によって吸着材４に到達するのを待つ場合に比べ、素早く分解ガスを吸着除去することができると共に、接地タンク２内への分解ガスの残留防止を図ることができる。   In this way, the communication path 9 is a circulation path, and the circulation device 22 is provided to forcibly circulate the gas. Therefore, compared with the case where the decomposition gas waits for the natural gas to reach the adsorbent 4, the decomposition gas can be quickly generated. While being able to be removed by adsorption, it is possible to prevent the decomposition gas from remaining in the ground tank 2.

また、本実施形態でも、ガス検知管３６を吸着材４よりも接地タンク２側である往路１５に設けており、吸着材４によって吸着される前に分解ガスを薬剤３５に接触させることができるので、より多くの分解ガスを薬剤３５に接触させることができ、分解ガスの検出感度を向上させることができる。また、薬剤３５を長期にわたってガスに曝しておくことができる。これらのため、接地タンク２内での異常発生をより迅速且つ容易に検出することができる。また、薬剤３５の変色は覗き部３８から確認することができるので、分解ガスを外部に採取しなくても分解ガスの発生、即ち異常の発生を検出することができる。このため、検出の為に煩雑な作業を行なう必要がなく簡便である。   Also in this embodiment, the gas detection tube 36 is provided in the forward path 15 on the ground tank 2 side of the adsorbent 4 so that the decomposition gas can be brought into contact with the drug 35 before being adsorbed by the adsorbent 4. Therefore, more decomposition gas can be brought into contact with the medicine 35, and the detection sensitivity of the decomposition gas can be improved. Moreover, the chemical | medical agent 35 can be exposed to gas over a long period of time. For these reasons, the occurrence of an abnormality in the ground tank 2 can be detected more quickly and easily. Further, since the discoloration of the medicine 35 can be confirmed from the peeping portion 38, generation of decomposition gas, that is, occurrence of abnormality can be detected without collecting the decomposition gas outside. For this reason, it is not necessary to perform complicated work for detection, and it is simple.

ハンドホールフランジ蓋２４はある程度の直径を有しており、往路１５と復路１６との間を離して設置することができる。このため、接地タンク２内でガスをより効率よく循環させることができ、接地タンク２内の分解ガスの残留をより一層防止することができる。また、ハンドホールフランジ蓋２４への配管２５，２６の固着は容易であり、ガス絶縁電力機器の製造は簡単である。なお、配管２５，２６をハンドホールフランジ蓋２４以外の部分に固着させても良い。また、各配管２５，２６のいずれか一方を給排気管６を利用して構成しても良い。また、ガス絶縁電力機器の同一ガス区画に２ヵ所以上のハンドホールフランジ蓋２４が設けられている場合には、別々のハンドホールフランジ蓋２４に往路１５となる配管２５と復路１６となる配管２６を固着するようにしても良い。この場合には、往路１５と復路１６をさらに離すことができるため、接地タンク２内でガスをより一層効率よく循環させることができ、接地タンク２内の分解ガスの残留をさらに防止することができる。   The handhole flange lid 24 has a certain diameter, and can be installed with a distance between the forward path 15 and the return path 16. For this reason, it is possible to circulate the gas more efficiently in the ground tank 2 and to further prevent the decomposition gas from remaining in the ground tank 2. Further, the pipes 25 and 26 are easily fixed to the handhole flange lid 24, and the manufacture of the gas insulated power device is simple. The pipes 25 and 26 may be fixed to portions other than the hand hole flange lid 24. Moreover, you may comprise either one of each piping 25 and 26 using the air supply / exhaust pipe 6. FIG. Further, when two or more handhole flange lids 24 are provided in the same gas section of the gas-insulated power device, a pipe 25 serving as the forward path 15 and a pipe 26 serving as the return path 16 are provided in different handhole flange lids 24. May be fixed. In this case, since the forward path 15 and the return path 16 can be further separated from each other, the gas can be circulated more efficiently in the ground tank 2, and the residual cracked gas in the ground tank 2 can be further prevented. it can.

また、上述の説明では、循環装置２２を密閉容器５内に設けていたが、ガスの強制的な循環流を発生させることが可能な位置であれば循環装置２２を他の位置に設けても良い。例えば、図４に示すように密閉容器５とは別個に循環装置２２を設けても良い。この循環装置２２は、例えばドライポンプである。なお、密閉容器５とは別個に循環装置２２を設ける場合には、例えば配管３３又は配管３２の途中に設けることが好ましい。配管３３又は配管３２の途中に循環装置２２を設けることで、密閉容器５と一緒に接地タンク２から循環装置２２を取り外すことができる。即ち、密閉容器５と循環装置２２とをユニット化できるので、取り扱いに便利である。   In the above description, the circulation device 22 is provided in the sealed container 5. However, the circulation device 22 may be provided at another position as long as it is a position where a forced circulation flow of gas can be generated. good. For example, as shown in FIG. 4, a circulation device 22 may be provided separately from the sealed container 5. The circulation device 22 is, for example, a dry pump. In addition, when providing the circulation apparatus 22 separately from the airtight container 5, it is preferable to provide in the middle of the piping 33 or the piping 32, for example. By providing the circulation device 22 in the middle of the pipe 33 or the pipe 32, the circulation device 22 can be removed from the ground tank 2 together with the sealed container 5. That is, since the sealed container 5 and the circulation device 22 can be unitized, it is convenient for handling.

なお、上述の形態は本発明の好適な形態の一例ではあるがこれに限定されるものではなく本発明の要旨を逸脱しない範囲において種々変形実施可能である。   The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

例えば、上述の説明では、接地タンク２から吸着材４に至るまでの間の連通路９にガス検知管３６を設けることで薬剤３５を配置するようにしていたが、ガス検知管３６全体を設ける代わりに、中身である薬剤３５を連通路９に直接配置するようにしても良い。この場合の一例を図５に示す。例えば、密閉容器側連通路１０（図１の場合）又は往路１５（図３の場合）の途中に薬剤室３７が設けられており、薬剤室３７内に薬剤３５を直接収容する。薬剤室３７内の薬剤３５は、密閉容器側連通路１０又は往路１５を自然拡散又は強制循環される分解ガスに接触することができる。薬剤室３７の蓋の中央部は透明になっており、これによって薬剤３５の変色を外部から視認できる覗き部３８が形成されている。この場合にも薬剤３５の変色によって分解ガスの発生を検出することができ、これによって異常の発生を検出することができる。   For example, in the above description, the gas detection pipe 36 is provided in the communication path 9 from the ground tank 2 to the adsorbent 4 so that the drug 35 is disposed. However, the entire gas detection pipe 36 is provided. Instead, the medicine 35 as the contents may be directly arranged in the communication path 9. An example of this case is shown in FIG. For example, a medicine chamber 37 is provided in the middle of the sealed container side communication path 10 (in the case of FIG. 1) or the outward path 15 (in the case of FIG. 3), and the medicine 35 is directly accommodated in the medicine chamber 37. The chemical | medical agent 35 in the chemical | medical agent chamber 37 can contact the cracked gas naturally diffused or forcedly circulated through the airtight container side communication path 10 or the outward path 15. The central part of the lid of the medicine chamber 37 is transparent, thereby forming a peeping part 38 where the discoloration of the medicine 35 can be visually recognized from the outside. Also in this case, the generation of the decomposition gas can be detected by the discoloration of the medicine 35, whereby the occurrence of the abnormality can be detected.

本発明のガス絶縁電力機器の第１の実施形態を示す概略構成図である。1 is a schematic configuration diagram illustrating a first embodiment of a gas insulated power device according to the present invention. 図１のガス検知管３６の断面図である。It is sectional drawing of the gas detection pipe | tube 36 of FIG. 本発明のガス絶縁電力機器の第２の実施形態を示す概略構成図である。It is a schematic block diagram which shows 2nd Embodiment of the gas insulated power apparatus of this invention. 本発明のガス絶縁電力機器の第３の実施形態を示す概略構成図である。It is a schematic block diagram which shows 3rd Embodiment of the gas insulated power equipment of this invention. 本発明のガス絶縁電力機器の第４の実施形態を示し、その薬剤室３７の断面図である。4 shows a gas insulated power device according to a fourth embodiment of the present invention, and is a sectional view of a drug chamber 37 thereof.

符号の説明Explanation of symbols

１ 絶縁ガス
２ 接地タンク
３ 導体
４ 吸着材
５ 密閉容器
６ 接地タンク側連通路
９ 連通路
１５ 往路
１６ 復路
２２ 循環装置
３５ 薬剤
３８ 覗き部 DESCRIPTION OF SYMBOLS 1 Insulating gas 2 Grounding tank 3 Conductor 4 Adsorbent 5 Sealed container 6 Grounding tank side communication path 9 Communication path 15 Outward path 16 Return path 22 Circulator 35 Drug 38 Peeping part

Claims (6)

絶縁ガスが封入された接地タンク内に導体を電気的に絶縁した状態で収容すると共に、前記接地タンク内で発生した前記絶縁ガスの分解ガスを吸着材によって吸着除去するガス絶縁電力機器において、前記吸着材を前記接地タンクとは別の密閉容器に収容すると共に、前記密閉容器を前記接地タンクに接続して前記密閉容器内と前記接地タンク内とを連通させ、前記接地タンクから前記吸着材に至るまでの間の連通路に、前記分解ガスとの接触によって変色する薬剤と、外部からの前記薬剤の視認を可能にする覗き部とを備えることを特徴とするガス絶縁電力機器。   In a gas-insulated power device that accommodates a conductor in a grounded tank filled with insulating gas in an electrically insulated state, and adsorbs and removes the decomposition gas of the insulating gas generated in the grounded tank with an adsorbent, The adsorbent is housed in a sealed container separate from the ground tank, and the sealed container is connected to the ground tank so that the inside of the sealed container and the ground tank communicate with each other. A gas-insulated power device comprising: a medicine that changes color by contact with the decomposition gas; and a peeping part that enables the medicine to be visually recognized from outside. 前記密閉容器は前記接地タンクから切り離し可能であり、前記密閉容器を切り離す場合に接地タンク側連通路を閉じる第１の開閉弁を備えることを特徴とする請求項１記載のガス絶縁電力機器。   2. The gas-insulated power apparatus according to claim 1, wherein the sealed container is separable from the ground tank, and includes a first on-off valve that closes the ground tank side communication path when the sealed container is separated. 前記密閉容器を切り離す場合に密閉容器側連通路を閉じる第２の開閉弁を備えることを特徴とする請求項１又は２記載のガス絶縁電力機器。   The gas insulated power device according to claim 1 or 2, further comprising a second on-off valve that closes the closed container side communication path when the sealed container is separated. 前記接地タンク内と前記密閉容器内とを連通する連通路は往路と復路とを有する循環路であり、前記薬剤及び前記覗き部は前記往路に設けられており、前記接地タンク内のガスを前記往路から前記密閉容器内に導いて前記復路から前記接地タンクへと循環させる循環装置を備えることを特徴とする請求項１から３のいずれか１つに記載のガス絶縁電力機器。   The communication path that connects the inside of the ground tank and the inside of the sealed container is a circulation path having a forward path and a return path, the drug and the peeping portion are provided in the forward path, and the gas in the ground tank is transferred to the ground path. The gas-insulated power apparatus according to any one of claims 1 to 3, further comprising a circulation device that leads from the forward path into the sealed container and circulates from the return path to the ground tank. 絶縁ガスが封入されている接地タンク内で発生した分解ガスを吸着する吸着材を前記接地タンクとは別の密閉容器に収容すると共に、前記密閉容器内と前記接地タンク内とを連通し、前記分解ガスを前記密閉容器内に導いて前記吸着材によって吸着除去すると共に、前記接地タンクから前記吸着材に至るまでの間の連通路に前記分解ガスとの接触によって変色する薬剤を配置し、前記薬剤の変色によって前記接地タンク内での異常の発生を検出することを特徴とするガス絶縁電力機器の異常検出方法。   The adsorbent that adsorbs the decomposition gas generated in the grounding tank in which the insulating gas is sealed is housed in a sealed container different from the grounded tank, and the sealed container and the grounded tank are communicated with each other. The cracked gas is introduced into the sealed container and adsorbed and removed by the adsorbent, and a chemical that changes color by contact with the cracked gas is disposed in the communication path from the grounded tank to the adsorbent. An abnormality detection method for a gas-insulated power device, wherein the occurrence of an abnormality in the ground tank is detected by a discoloration of a medicine. 前記接地タンク内と前記密閉容器内とを連通する連通路を往路と復路とを有する循環路にすると共に、循環装置によって前記接地タンク内のガスを前記往路から前記密閉容器内に導いて前記復路から前記接地タンク内へと循環させることを特徴とする請求項５記載のガス絶縁電力機器の異常検出方法。   The communication path that connects the inside of the grounded tank and the inside of the sealed container is a circulation path that has a forward path and a return path, and the return path is configured to guide the gas in the grounded tank from the forward path to the sealed container by a circulation device. 6. The method for detecting an abnormality of a gas insulated power device according to claim 5, wherein the abnormality is circulated from the ground to the ground tank.
JP2006243960A 2006-09-08 2006-09-08 Gas insulated power apparatus and abnormality detection method therefor Pending JP2008067536A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009254140A (en) * 2008-04-07 2009-10-29 Mitsubishi Electric Corp Manufacturing method of gas filter and chemical cylinder using it, and manufacturing method of gas-insulated switchgear
DE112009000497T5 (en) 2008-03-17 2011-04-21 Mitsubishi Electric Corp. Origin position signal detector

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112009000497T5 (en) 2008-03-17 2011-04-21 Mitsubishi Electric Corp. Origin position signal detector
JP2009254140A (en) * 2008-04-07 2009-10-29 Mitsubishi Electric Corp Manufacturing method of gas filter and chemical cylinder using it, and manufacturing method of gas-insulated switchgear

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