JP2008153008A - Gas leakage surveillance system of gas-blast circuit breaker - Google Patents

Gas leakage surveillance system of gas-blast circuit breaker Download PDF

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JP2008153008A
JP2008153008A JP2006338306A JP2006338306A JP2008153008A JP 2008153008 A JP2008153008 A JP 2008153008A JP 2006338306 A JP2006338306 A JP 2006338306A JP 2006338306 A JP2006338306 A JP 2006338306A JP 2008153008 A JP2008153008 A JP 2008153008A
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pressure
gas
circuit breaker
gas circuit
temperature
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JP5030574B2 (en
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Katsuhiko Hirashima
克彦 平島
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Chugoku Electric Power Co Inc
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/065—Means for detecting or reacting to mechanical or electrical defects
    • H02B13/0655—Means for detecting or reacting to mechanical or electrical defects through monitoring changes of gas properties

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas leakage surveillance system of a gas-blast circuit breaker capable of early discovering leak of insulation gas sealed inside the breaker. <P>SOLUTION: The system is structured of a pressure sensor 2 detecting pressure of the insulation gas sealed inside the gas-blast circuit breaker, a temperature sensor 3 provided at a gas-blast circuit breaker main body 10, a pressure conversion means 4 converting the pressure measured by the pressure sensor 2 into a pressure of a reference temperature based on temperature measured by the temperature sensor 3, and a leakage detection means 5 detecting leak of the insulation gas from changes of the pressure after the conversion. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ガス遮断器内部に封入された絶縁性ガスの漏洩を検出するガス遮断器のガス漏洩監視システムに関する。   The present invention relates to a gas leakage monitoring system for a gas circuit breaker that detects leakage of an insulating gas sealed inside the gas circuit breaker.

ガス遮断器は、電流を遮断する際に、開閉器の電極間に発生するアーク放電に対して圧縮した絶縁性ガスを吹き付けて消弧させている。このガス遮断器内部に封入された絶縁性ガスの量は、遮断器に設けた圧力センサの指示値により管理され、絶縁性ガスの漏洩などの不具合を検出している。また、ガス遮断器内部に封入された絶縁性ガスの圧力を検出する圧力センサは、例えば特許文献１に記載のものが知られている。   The gas circuit breaker is extinguished by blowing compressed insulating gas against arc discharge generated between the electrodes of the switch when interrupting the current. The amount of the insulating gas sealed in the gas circuit breaker is managed by an indication value of a pressure sensor provided in the circuit breaker, and detects a malfunction such as leakage of the insulating gas. As a pressure sensor for detecting the pressure of the insulating gas sealed inside the gas circuit breaker, for example, the one described in Patent Document 1 is known.

特開平５−３６３３３号公報Japanese Patent Laid-Open No. 5-36333

しかし、ガス遮断器内部に封入された絶縁性ガスの圧力は、ガス温度の変化による影響を大きく受けるために、温度変化が大きい状況下では絶縁性ガスの漏洩の早期発見が困難であるという課題があった。
また、ガス遮断器内部に封入する絶縁性ガスとしては六フッ化硫黄（ＳＦ６）ガスが一般的に使用されており、この六フッ化硫黄ガスは「地球温暖化防止京都会議」で規制対象となり、厳重な管理が要求されている。 However, since the pressure of the insulating gas sealed inside the gas circuit breaker is greatly affected by changes in the gas temperature, it is difficult to detect the leakage of the insulating gas at an early stage under a large temperature change. was there.
In addition, sulfur hexafluoride (SF 6 ) gas is generally used as the insulating gas sealed inside the gas circuit breaker. This sulfur hexafluoride gas is subject to regulation at the Kyoto Conference on Global Warming Prevention. Therefore, strict management is required.

そこで、本発明は、ガス遮断器内部に封入された絶縁性ガスの漏洩を早期に発見することができるガス遮断器のガス漏洩監視システムを提供するものである。   Therefore, the present invention provides a gas leakage monitoring system for a gas circuit breaker that can detect the leakage of the insulating gas sealed inside the gas circuit breaker at an early stage.

本発明は、上記課題を解決するために、ガス遮断器内部に封入された絶縁性ガスの圧力を検出する圧力センサと、ガス遮断器本体に設けた温度センサと、該温度センサで測定した温度に基づいて前記圧力センサで測定した圧力を基準温度の圧力に換算する圧力換算手段と、換算後の圧力の変化から前記絶縁性ガスの漏洩を検出する漏洩検出手段とからなるガス遮断器のガス漏洩監視システムを提供するものである。   In order to solve the above problems, the present invention provides a pressure sensor for detecting the pressure of an insulating gas sealed in a gas circuit breaker, a temperature sensor provided in the gas circuit breaker body, and a temperature measured by the temperature sensor. A gas circuit breaker gas comprising pressure conversion means for converting the pressure measured by the pressure sensor to a reference temperature pressure and leakage detection means for detecting leakage of the insulating gas from the change in pressure after conversion A leak monitoring system is provided.

また、本発明は、前記圧力換算手段が下記数２式で表す換算式で絶縁性ガスの圧力を換算するようにした請求項１に記載のガス遮断器のガス漏洩監視システムを提供するものである。   Further, the present invention provides a gas leakage monitoring system for a gas circuit breaker according to claim 1, wherein the pressure conversion means converts the pressure of the insulating gas by a conversion formula represented by the following equation (2). is there.

Figure 2008153008
Figure 2008153008

また、本発明は、前記圧力換算手段が、前記圧力センサと前記温度センサの測定値を無線通信によって自動収集するようにした請求項１又は２に記載のガス遮断器のガス漏洩監視システムを提供するものである。   Further, the present invention provides the gas leakage monitoring system for a gas circuit breaker according to claim 1 or 2, wherein the pressure conversion means automatically collects measured values of the pressure sensor and the temperature sensor by wireless communication. To do.

本発明に係るガス遮断器のガス漏洩監視システムによれば、ガス遮断器内部に封入された絶縁性ガスの圧力を検出する圧力センサと、ガス遮断器本体に設けた温度センサと、該温度センサで測定した温度に基づいて前記圧力センサで測定した圧力を基準温度の圧力に換算する圧力換算手段と、換算後の圧力の変化から前記絶縁性ガスの漏洩を検出する漏洩検出手段とからなる構成を有することにより、基準温度の圧力に換算した絶縁性ガスの圧力に基づいてガス遮断器内部に封入されたガス量を正確に把握することができ、換算後の圧力の変化から絶縁性ガスの漏洩を早期に検出することができる効果がある。   According to the gas leakage monitoring system for a gas circuit breaker according to the present invention, the pressure sensor for detecting the pressure of the insulating gas sealed in the gas circuit breaker, the temperature sensor provided in the gas circuit breaker body, and the temperature sensor A pressure conversion means for converting the pressure measured by the pressure sensor into a reference temperature pressure based on the temperature measured in step (b), and a leak detection means for detecting leakage of the insulating gas from the change in pressure after conversion. It is possible to accurately grasp the amount of gas enclosed in the gas circuit breaker based on the pressure of the insulating gas converted to the pressure of the reference temperature, and from the change in pressure after conversion, the insulating gas There is an effect that leakage can be detected at an early stage.

また、本発明は、前記圧力換算手段が上記数２式で表す換算式で絶縁性ガスの圧力を換算するようにした請求項１に記載の構成を有することにより、温度センサによってガス遮断器内部に封入された絶縁性ガスの温度を直接測定することができない場合でも、温度補正によりガス遮断器内部に封入されたガス量を正確に把握することができる。また、温度センサをガス遮断器内部に設ける必要がないから、低コストで絶縁性ガスの圧力を換算することができる効果がある。   Moreover, this invention has the structure of Claim 1 which made the said pressure conversion means convert the pressure of insulating gas with the conversion type | formula represented by said Formula 2, By the temperature sensor, it is the inside of a gas circuit breaker. Even when the temperature of the insulating gas sealed in the tube cannot be directly measured, the amount of gas sealed in the gas circuit breaker can be accurately grasped by the temperature correction. Further, since there is no need to provide a temperature sensor inside the gas circuit breaker, there is an effect that the pressure of the insulating gas can be converted at a low cost.

また、本発明は、前記圧力換算手段が、前記圧力センサと前記温度センサの測定値を無線通信によって自動収集するようにした請求項１又は２に記載の構成を有することにより、絶縁性ガスの圧力及び温度を自動的且つ連続的に測定することができ、絶縁性ガスの漏洩を早期に検出することができる効果がある。   Further, the present invention provides the structure according to claim 1 or 2, wherein the pressure conversion means automatically collects the measured values of the pressure sensor and the temperature sensor by wireless communication. Pressure and temperature can be measured automatically and continuously, and there is an effect that leakage of insulating gas can be detected at an early stage.

本発明の実施の形態を図示する実施例に基づいて説明する。
本発明に係るガス遮断器のガス漏洩監視システムは、ガス遮断器内部に封入された絶縁性ガスの圧力を検出する圧力センサ２と、ガス遮断器本体１０に設けた温度センサ３と、該温度センサ３で測定した温度に基づいて前記圧力センサ２で測定した圧力を基準温度の圧力に換算する圧力換算手段４と、換算後の圧力の変化から前記絶縁性ガスの漏洩を検出する漏洩検出手段５とから構成してある。 Embodiments of the present invention will be described based on examples shown in the drawings.
The gas leakage monitoring system for a gas circuit breaker according to the present invention includes a pressure sensor 2 for detecting the pressure of an insulating gas sealed in the gas circuit breaker, a temperature sensor 3 provided in the gas circuit breaker body 10, and the temperature. Pressure converting means 4 for converting the pressure measured by the pressure sensor 2 into a reference temperature pressure based on the temperature measured by the sensor 3, and leakage detecting means for detecting leakage of the insulating gas from the change in pressure after conversion. 5.

図３乃至図５は、ガス遮断器の動作状態を示している。図示の実施例において、ガス遮断器１１はパッファ形遮断器であり、絶縁性ガスを密封したガス遮断器本体１０内に、固定接触子部２０と可動接触子部３０を対向配置してある。   3 to 5 show the operating state of the gas circuit breaker. In the illustrated embodiment, the gas circuit breaker 11 is a puffer-type circuit breaker, and the fixed contact portion 20 and the movable contact portion 30 are arranged opposite to each other in the gas circuit breaker body 10 sealed with an insulating gas.

図３に示すように、固定接触子部２０は固定接触子２１からなり、ガス遮断器本体１０内に固定して設けてある。可動接触子部３０は、円筒状の絶縁操作ロッド３３により軸方向に往復運動可能に設けてあり、この絶縁操作ロッド３３の先端部にはパッファシリンダ３４を介して、可動アーキング接触子３１と、主可動接触子３２を設けてある。また、パッファシリンダ３４内には、絶縁操作ロッド３３と連動しない固定ピストン３５を挿入してある。   As shown in FIG. 3, the stationary contact portion 20 includes a stationary contact 21 and is fixedly provided in the gas circuit breaker body 10. The movable contact portion 30 is provided so as to be able to reciprocate in the axial direction by a cylindrical insulating operation rod 33, and a movable arcing contact 31 is connected to a distal end portion of the insulating operation rod 33 via a puffer cylinder 34. A main movable contact 32 is provided. Further, a fixed piston 35 that is not interlocked with the insulating operation rod 33 is inserted into the puffer cylinder 34.

図３は、ガス遮断器１１の閉路状態を示す断面図であり、絶縁操作ロッド３３が前進して、固定接触子部２０の固定接触子２１と可動接触子部３０の可動アーキング接触子３１及び主可動接触子３２が接触しており、ガス遮断器１１は投入状態になっている。   FIG. 3 is a cross-sectional view showing a closed state of the gas circuit breaker 11, in which the insulating operation rod 33 moves forward, the fixed contact 21 of the fixed contact 20, the movable arcing contact 31 of the movable contact 30, and The main movable contactor 32 is in contact with the gas circuit breaker 11.

図４は、ガス遮断器１１の開路過程を示す断面図であり、図３の状態から絶縁操作ロッド３３が後退し、固定接触子２１から可動アーキング接触子３１及び主可動接触子３２が開離し、固定接触子２１と可動アーキング接触子３１との間にアークが発生する。パッファシリンダ３４は絶縁操作ロッド３３と共に後退し、固定ピストン３５によりパッファシリンダ３４内の絶縁性ガスが圧縮される。この圧縮された絶縁性ガスは、パッファシリンダ３４の先端部のノズルから吹き出し、固定接触子２１と可動アーキング接触子３１の間のアークを消弧させて、図５に示すようにガス遮断器１１は開路（遮断）された状態になる。   FIG. 4 is a cross-sectional view showing the opening process of the gas circuit breaker 11. The insulating operation rod 33 is retracted from the state of FIG. 3 and the movable arcing contact 31 and the main movable contact 32 are separated from the fixed contact 21. An arc is generated between the stationary contact 21 and the movable arcing contact 31. The puffer cylinder 34 moves backward together with the insulating operation rod 33, and the insulating gas in the puffer cylinder 34 is compressed by the fixed piston 35. The compressed insulating gas blows out from the nozzle at the tip of the puffer cylinder 34, extinguishes the arc between the stationary contact 21 and the movable arcing contact 31, and as shown in FIG. Is in an open (blocked) state.

図１に示すガス漏洩監視システムは、ガス遮断器本体１０内に密封した絶縁性ガスの漏洩を検出することができるように構成してある。
圧力センサ２は、ガス遮断器本体１０内のガス圧力を伝える圧力伝送路と圧力計とからなり、ガス遮断器内部に封入された絶縁性ガスの圧力を検出することができるようにしてある。また、圧力センサ２の測定値は、無線通信によって圧力換算手段４に送信することにより、遠隔地のガス遮断器１１の圧力を自動収集することも可能である。 The gas leakage monitoring system shown in FIG. 1 is configured to detect leakage of an insulating gas sealed in the gas circuit breaker body 10.
The pressure sensor 2 includes a pressure transmission path that transmits the gas pressure in the gas circuit breaker body 10 and a pressure gauge, and can detect the pressure of the insulating gas sealed in the gas circuit breaker. Further, the pressure sensor 2 can automatically collect the pressure of the gas circuit breaker 11 at a remote location by transmitting the measured value of the pressure sensor 2 to the pressure conversion means 4 by wireless communication.

図示の実施例において、温度センサ３は、ガス遮断器本体１０の周囲に設けてある。温度センサ３には種々の温度計を使用することができ、また、ガス遮断器本体１０内に熱電対等の温度計を挿入して、絶縁性ガスの温度を直接測定できるように設けることも可能である。また、温度センサ３の測定値も、無線通信によって圧力換算手段４に送信することができるようにしてある。   In the illustrated embodiment, the temperature sensor 3 is provided around the gas circuit breaker body 10. Various thermometers can be used for the temperature sensor 3, and a thermometer such as a thermocouple can be inserted into the gas circuit breaker body 10 so that the temperature of the insulating gas can be directly measured. It is. The measured value of the temperature sensor 3 can also be transmitted to the pressure conversion means 4 by wireless communication.

図示の実施例において、圧力換算手段４は、温度センサ３で測定したガス遮断器本体１０の周囲の温度Ｔに基づいて、圧力センサ２で測定した圧力Ｐを基準温度Ｔ０の圧力Ｐ０に換算することができるように構成してある。圧力換算手段４は、下記数３式で表す換算式で測定された絶縁性ガスの圧力Ｐを基準温度Ｔ０の圧力Ｐ０に換算するようにしてある。 In the illustrated embodiment, the pressure conversion means 4, based on the temperature T of the gas around the breaker body 10 measured by the temperature sensor 3, the pressure P measured by the pressure sensor 2 to the pressure P 0 of the reference temperature T 0 It is configured so that it can be converted. The pressure conversion means 4 converts the pressure P of the insulating gas measured by the conversion formula represented by the following formula 3 into the pressure P 0 of the reference temperature T 0 .

Figure 2008153008
Figure 2008153008

実施例において、測定温度Ｔはガス遮断器本体１０の周囲の温度であり、絶縁性ガスの温度と一致しないから、圧力換算手段４が数３式に示すように圧力の補正を行うようにしてある。絶縁性ガスは、ガス遮断器本体１０よりも温度変化が小さいことから、基準温度Ｔ０を年平均温度近くに設定し、測定温度と基準温度の温度差（Ｔ−Ｔ０）に比例した補正を行っている。実施例では、基準温度Ｔ０を２０℃とし、補正係数Ｋを０．００１５としてある。 In the embodiment, the measured temperature T is the ambient temperature of the gas circuit breaker main body 10 and does not coincide with the temperature of the insulating gas, so that the pressure conversion means 4 corrects the pressure as shown in equation (3). is there. Since the temperature change of the insulating gas is smaller than that of the gas circuit breaker body 10, the reference temperature T 0 is set close to the annual average temperature, and the correction is proportional to the temperature difference (T−T 0 ) between the measured temperature and the reference temperature. It is carried out. In the embodiment, the reference temperature T 0 is 20 ° C., and the correction coefficient K is 0.0015.

漏洩検出手段５は、図２に示すように、換算後の圧力Ｐ０の変化から絶縁性ガスの漏洩を検出することができるように構成してある。漏洩検出手段５は、圧力Ｐ０が年平均のガス圧力から一定値を引いた値（点検値）以下になると、異常を検出するようにしてある。異常を検出した漏洩検出手段５は、ガス遮断器１１の状態を判別し、ガス遮断器１１が遮断状態で圧力Ｐ０が点検値から０．０３ＭＰａ以内のときは漏洩無しと判断し、ガス遮断器１１が投入状態又は圧力Ｐ０が点検値から０．０３ＭＰａ以上低いときは漏洩の恐れがあると判断して圧力変化を監視するようにしてある。 As shown in FIG. 2, the leak detection means 5 is configured to detect the leak of the insulating gas from the change in the converted pressure P 0 . The leak detection means 5 detects an abnormality when the pressure P 0 is equal to or less than a value (inspection value) obtained by subtracting a constant value from the annual average gas pressure. The leak detection means 5 that has detected the abnormality determines the state of the gas circuit breaker 11 and determines that there is no leakage when the gas circuit breaker 11 is in the cut-off state and the pressure P 0 is within 0.03 MPa from the inspection value. vessel 11 when the closed state or the pressure P 0 is less than 0.03MPa from inspection values are to be monitored a pressure change is determined that there is a risk of leakage.

漏洩検出手段５は、圧力変化を監視して圧力低下が検出されたときに、絶縁性ガスの漏洩有りと判断して、警報を発することができるように構成してある。
上述のように、漏洩検出手段５は、ガス遮断器１１が遮断状態のときに電流が流れないことによるガス温度の低下（ガス圧力の低下）を考慮し、ガス遮断器１１が遮断状態のときは投入状態より低い圧力で漏洩を検出するようにしてある。 The leak detection means 5 is configured to be able to issue an alarm by judging that there is a leak of the insulating gas when a pressure drop is detected by monitoring a pressure change.
As described above, when the gas circuit breaker 11 is in the cut-off state, the leak detection means 5 takes into account the gas temperature drop (gas pressure drop) due to the current not flowing when the gas circuit breaker 11 is in the cut-off state. Is designed to detect leaks at a lower pressure than the charged state.

本発明に係るガス遮断器のガス漏洩監視システムの一実施例を示す構成図。The block diagram which shows one Example of the gas leak monitoring system of the gas circuit breaker which concerns on this invention. その一実施例の作用を示すフローチャート。The flowchart which shows the effect | action of the one Example. ガス遮断器の閉路状態を示す断面図。Sectional drawing which shows the closed circuit state of a gas circuit breaker. ガス遮断器の開路過程を示す断面図。Sectional drawing which shows the open circuit process of a gas circuit breaker. ガス遮断器の開路状態を示す断面図。Sectional drawing which shows the open circuit state of a gas circuit breaker.

符号の説明Explanation of symbols

１ 中央制御装置
２ 圧力センサ
３ 温度センサ
４ 圧力換算手段
５ 漏洩検出手段
１０ ガス遮断器本体
１１ ガス遮断器
２０ 固定接触子部
２１ 固定接触子
３０ 可動接触子部
３１ 可動アーキング接触子
３２ 主可動接触子
３３ 絶縁操作ロッド
３４ パッファシリンダ
３５ 固定ピストン
DESCRIPTION OF SYMBOLS 1 Central controller 2 Pressure sensor 3 Temperature sensor 4 Pressure conversion means 5 Leak detection means 10 Gas circuit breaker main body 11 Gas circuit breaker 20 Fixed contact part 21 Fixed contact 30 Movable contact part 31 Movable arcing contact 32 Main movable contact Child 33 Insulating operation rod 34 Puffer cylinder 35 Fixed piston

Claims (3)

ガス遮断器内部に封入された絶縁性ガスの圧力を検出する圧力センサと、ガス遮断器本体に設けた温度センサと、該温度センサで測定した温度に基づいて前記圧力センサで測定した圧力を基準温度の圧力に換算する圧力換算手段と、換算後の圧力の変化から前記絶縁性ガスの漏洩を検出する漏洩検出手段とからなるガス遮断器のガス漏洩監視システム。   A pressure sensor for detecting the pressure of the insulating gas sealed in the gas circuit breaker, a temperature sensor provided in the gas circuit breaker body, and a pressure measured by the pressure sensor based on the temperature measured by the temperature sensor A gas leakage monitoring system for a gas circuit breaker comprising pressure conversion means for converting to a temperature pressure and leakage detection means for detecting leakage of the insulating gas from a change in pressure after conversion. 前記圧力換算手段が下記数１式で表す換算式で絶縁性ガスの圧力を換算するようにした請求項１に記載のガス遮断器のガス漏洩監視システム。
Figure 2008153008
 The gas leakage monitoring system for a gas circuit breaker according to claim 1, wherein the pressure conversion means converts the pressure of the insulating gas by a conversion formula expressed by the following equation (1).
Figure 2008153008
 前記圧力換算手段が、前記圧力センサと前記温度センサの測定値を無線通信によって自動収集するようにした請求項１又は２に記載のガス遮断器のガス漏洩監視システム。
The gas leakage monitoring system for a gas circuit breaker according to claim 1 or 2, wherein the pressure conversion means automatically collects measured values of the pressure sensor and the temperature sensor by wireless communication.
JP2006338306A 2006-12-15 2006-12-15 Gas circuit breaker monitoring system Expired - Fee Related JP5030574B2 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03222613A (en) * 1990-01-26 1991-10-01 Nissin Electric Co Ltd Gas leakage-monitoring device of gas-insulated electric equipment
JP2005027439A (en) * 2003-07-03 2005-01-27 Japan Ae Power Systems Corp Gas insulated switchgear
JP2005228174A (en) * 2004-02-16 2005-08-25 Sanyo Electric Co Ltd Tank monitoring system
JP2006268374A (en) * 2005-03-23 2006-10-05 Fuji Xerox Co Ltd Control system, road surface, and control unit
JP2006304523A (en) * 2005-04-22 2006-11-02 Tokyo Gas Co Ltd Management system of power distribution facility and management method of power distribution facility

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03222613A (en) * 1990-01-26 1991-10-01 Nissin Electric Co Ltd Gas leakage-monitoring device of gas-insulated electric equipment
JP2005027439A (en) * 2003-07-03 2005-01-27 Japan Ae Power Systems Corp Gas insulated switchgear
JP2005228174A (en) * 2004-02-16 2005-08-25 Sanyo Electric Co Ltd Tank monitoring system
JP2006268374A (en) * 2005-03-23 2006-10-05 Fuji Xerox Co Ltd Control system, road surface, and control unit
JP2006304523A (en) * 2005-04-22 2006-11-02 Tokyo Gas Co Ltd Management system of power distribution facility and management method of power distribution facility

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