JP2004120944A - Point of accident locator for gas-insulated switchgear - Google Patents

Point of accident locator for gas-insulated switchgear Download PDF

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Publication number
JP2004120944A
JP2004120944A JP2002283609A JP2002283609A JP2004120944A JP 2004120944 A JP2004120944 A JP 2004120944A JP 2002283609 A JP2002283609 A JP 2002283609A JP 2002283609 A JP2002283609 A JP 2002283609A JP 2004120944 A JP2004120944 A JP 2004120944A
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JP
Japan
Prior art keywords
gas
accident
point
insulated switchgear
accident point
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.)
Pending
Application number
JP2002283609A
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Japanese (ja)
Inventor
Hideo Kawaguchi
川口 英雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Engineering Corp
Original Assignee
Toshiba Engineering Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to JP2002283609A priority Critical patent/JP2004120944A/en
Publication of JP2004120944A publication Critical patent/JP2004120944A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a point of accident spotting apparatus for gas-insulated switchgear wherein any point of accident can be visually checked without opening equipment or a gas-sealed point and the time required for locating an accident can be shortened. <P>SOLUTION: A transparent material 11 is used for a gas-introduced area, and as a point of accident locating portion, a litmus liquid coated sheet 12, a spherical friction pointer instrument 13, or a label-type thermometer is provided. Thus, a point where an accident has occurred can be visually checked from outside, and the time required for locating the accident can be shortened. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、受変電設備などで使用されているガス絶縁開閉装置の主回路内部で発生する短絡又は地絡などの事故発生箇所を標定するための事故点標定装置に関する。
【0002】
【従来の技術】
図4に示すようにSF6ガス41を封入したガス絶縁開閉装置は、第1ガス区分45、第2ガス区分46に仕切られており、両ガス区分45、46間には配管ボス47を介して故障点標定装置48が接続されている。いま、主回路導体42にて短絡又は地絡事故43が発生するとアーク電流48が起きてしまう。ガス絶縁開閉装置の外部は金属タンク44に覆われているため、事故発生箇所の特定が困難であった。
【0003】
従来は、事故の箇所から発生する分解ガス臭を探し出したり、SF6ガス41が熱分解によって発生する分解生成物を検知管で検出したり、SF6ガス41が熱膨張によって圧力上昇する変化信号を圧力センサを使用して標定したりしていた。(例えば特許文献1参照)。
【0004】
また、ガス絶縁開閉装置は、複数のガス区画間が絶縁スペーサで仕切られているが、各絶縁スペーサの外周に零相電流検出用光ファイバ変流器を設け、この変流器の出力を用いて事故点を標定する。(例えば特許文献2参照)。
【0005】
【特許文献1】
特開平8−182132号公報
【特許文献2】
特開平8−149633号公報
【0006】
【発明が解決しようとする課題】
上記いずれの従来の技術においても、肉眼で事故点を確認するためには、ガス封入箇所の開放などが必要となり、外部から事故点をすばやく見つけるには問題があった。
【0007】
本発明は上記した従来の課題を解決するためになされたもので、機器やガス封入箇所を開放せずに目視で事故点を確認することができ、事故点の標定時間が短縮できるガス絶縁開閉装置の事故点標定装置を提供することを目的とする。
【0008】
【課題を解決するための手段】
上記目的を達成するためになされた本発明に係わるガス絶縁開閉装置の事故点標定装置は、ガス誘導部分に透明材料を使用した事故点標定部を設けたことを要旨とする。
【0009】
更に本発明に係わるガス絶縁開閉装置の事故点標定装置は、前記事故点標定部としてリトマス液塗布シートを設けたことを要旨とする。
【0010】
更に本発明に係わるガス絶縁開閉装置の事故点標定装置は、前記事故点標定部として球形置針装置を封入したことを要旨とする。
【0011】
更に本発明に係わるガス絶縁開閉装置の事故点標定装置は、前記事故点標定部としてラベル式温度計を設けたことを要旨とする。
【0012】
【発明の実施の形態】
以下に本発明の実施形態を図を参照して説明する。なお、各図において図4にて説明したと同一の箇所は重複して説明は行わず、本発明の実施形態の説明に欠かせない箇所についてのみ示してある。
【0013】
ガス絶縁開閉装置にて短絡または地絡を起こした場合、事故を起こした主回路導体間または主回路導体と金属タンク間にアーク電流が流れる。アーク電流によってSF6ガスがアークで熱を帯びたり、アーク熱により膨張ガスや分解生成物が発生する。
【0014】
そこで、本発明にあっては、ガス区分と隣接ガス区分を接続する配管やガス区分との接続部に透明材料を使用することで、分解生成物や短絡または地絡現象を外部から確認することを可能とし、事故発生時の迅速な対応が可能となる。具体的には透明材料部分に各種標定処置を施すことにより標定効率の向上が可能となる。以下に種々の実施例を図を参照して説明する。
【0015】
図1を参照して第1実施例を説明する。SF6ガスは通常安定した分子構造で中性である。しかしながら、ガス絶縁開閉装置が地絡した場合には、地絡電流によるアーク熱によりHF、SO2、SO4などの酸性分解生成物が発生する。ガス区分とガス区分を接続する配管または継手部分に透明材料11を使用し、内面にリトマス液塗布シート12を貼着する。地絡時の酸性分解生成物により、リトマス液塗布シート12が赤色に変化することを外部から目視で確認し地絡発生箇所を標定することができる。
【0016】
次に図2を参照して第2実施例を説明する。ガス絶縁開閉装置内部で地絡した場合、SF6ガスと地絡熱による分解生成物が発生するとともにアーク熱により内部SF6ガスが膨張し圧力上昇が発生する。そこで、ガス区分とガス区分を接続する配管または継手部分に透明材料11を使用し、更に、内部に通気可能な球形置針装置13を封入することで、地絡時の圧力により球形置針装置13が図のA点からB点のように定位置から移動したことを外部から目視で確認することにより、地絡箇所を標定することができる。
【0017】
次に図3を参照して第3実施例を説明する。ガス絶縁開閉装置内部で地絡した場合、SF6ガスと地絡アークによる分解生成物が発生するとともにアーク熱が発生し周囲に温度が伝播するガス区分とガス区分を接続する配管又は継手部分に透明材料11を使用し、内面にラベル式温度計14を封入することで、地絡箇所からのアーク熱を検出することができる。地絡事故の際、外部からラベル式温度計14を目視で確認することにより地絡事故を標定することができる。
【0018】
【発明の効果】
上述したように、事故発生箇所が機器やガス封入箇所を開放せず目視で確認することができ、事故点の標定時間が短縮することが可能となった。また、ガス絶縁開閉装置は電磁誘導作用により主回路導体と平行にシース電流が流れるガスタンクにはシース電流を流すためシャントバーの取り付けなどの処置を行っている。このシース電流がガスタンクに接続されたガス配管に分流し、不適合を起こさないようガス配管に絶縁処理が必要である。本発明に係わる標定装置の透明材料部分をプラスチックなどの絶縁物を使用することにより、絶縁継手の機能も備えた複合型事故点標定装置としての効果も認められる。
【図面の簡単な説明】
【図1】本発明の第1の実施例を示す断面図。
【図2】本発明の第2の実施例を示す断面図。
【図3】本発明の第3の実施例を示す断面図。
【図4】従来の技術を説明するための断面図。
【符号の説明】
11…透明材料
12…リトマス液塗布シート
13…球形置針装置
14…ラベル式温度計
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fault point locating device for locating a fault location such as a short circuit or a ground fault occurring in a main circuit of a gas insulated switchgear used in a substation facility or the like.
[0002]
[Prior art]
As shown in FIG. 4, the gas insulated switchgear in which SF6 gas 41 is sealed is partitioned into a first gas section 45 and a second gas section 46, and a pipe boss 47 is provided between the two gas sections 45 and 46. A fault point locating device 48 is connected. Now, when a short circuit or ground fault 43 occurs in the main circuit conductor 42, an arc current 48 occurs. Since the outside of the gas insulated switchgear is covered with the metal tank 44, it was difficult to identify the location where the accident occurred.
[0003]
Conventionally, a decomposition gas odor generated from the accident site is searched for, a decomposition product generated by thermal decomposition of the SF6 gas 41 is detected by a detector tube, and a change signal in which the SF6 gas 41 increases in pressure due to thermal expansion is detected as a pressure signal. Orientation using sensors. (See, for example, Patent Document 1).
[0004]
In the gas insulated switchgear, a plurality of gas compartments are partitioned by insulating spacers, and an optical fiber current transformer for zero-phase current detection is provided on the outer periphery of each insulating spacer, and the output of the current transformer is used. To locate the accident point. (See, for example, Patent Document 2).
[0005]
[Patent Document 1]
JP-A-8-182132 [Patent Document 2]
JP-A-8-149633
[Problems to be solved by the invention]
In any of the above-mentioned conventional techniques, it is necessary to open a gas-filled portion in order to check the accident point with the naked eye, and there is a problem in quickly finding the accident point from the outside.
[0007]
The present invention has been made in order to solve the above-mentioned conventional problems, and it is possible to visually confirm an accident point without opening a device or a gas filled portion, and to shorten a time required for locating the accident point by using a gas insulated switchgear. An object of the present invention is to provide a device for locating an accident.
[0008]
[Means for Solving the Problems]
The gist of the present invention for achieving the above object is to provide a gas insulated switchgear with an accident point locator using a transparent material in a gas guiding portion.
[0009]
Further, the accident point locating device of the gas insulated switchgear according to the present invention is characterized in that a litmus liquid application sheet is provided as the accident point locating section.
[0010]
Further, the gazetteer for a gas insulated switchgear according to the present invention is characterized in that a spherical needle device is sealed as the gazetteer.
[0011]
Furthermore, the gist of the accident point locating device for a gas insulated switchgear according to the present invention is that a label type thermometer is provided as the accident point locating unit.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings. In each of the drawings, the same portions as those described in FIG. 4 will not be redundantly described, and only the portions indispensable for the description of the embodiments of the present invention are shown.
[0013]
When a short circuit or a ground fault occurs in the gas insulated switchgear, an arc current flows between the main circuit conductors in which the accident has occurred or between the main circuit conductor and the metal tank. The arc current causes the SF6 gas to be heated by the arc, and the arc heat generates expansion gas and decomposition products.
[0014]
Therefore, in the present invention, by using a transparent material for the pipe connecting the gas section and the adjacent gas section and for the connection part of the gas section, it is possible to externally check decomposition products, short circuits or ground fault phenomena. And quick response in the event of an accident. Specifically, by performing various orientation treatments on the transparent material portion, the orientation efficiency can be improved. Hereinafter, various embodiments will be described with reference to the drawings.
[0015]
The first embodiment will be described with reference to FIG. SF6 gas is usually neutral with a stable molecular structure. However, when the gas insulated switchgear is grounded, acidic decomposition products such as HF, SO2, and SO4 are generated by arc heat due to the ground fault current. A transparent material 11 is used for a pipe or a joint portion connecting the gas sections, and a litmus liquid application sheet 12 is adhered to the inner surface. It can be visually confirmed from the outside that the litmus liquid application sheet 12 turns red due to the acidic decomposition product at the time of the ground fault, and the location of the ground fault occurrence can be determined.
[0016]
Next, a second embodiment will be described with reference to FIG. When a ground fault occurs inside the gas insulated switchgear, a decomposition product due to the SF6 gas and ground fault heat is generated, and the internal SF6 gas expands due to the arc heat, causing a pressure rise. Therefore, the transparent material 11 is used for a pipe or a joint part connecting the gas sections and the gas section, and furthermore, the spherical needle apparatus 13 which can be ventilated is sealed therein, so that the spherical needle apparatus 13 is formed by the pressure at the time of the ground fault. A ground fault location can be located by visually confirming from outside that it has moved from a fixed position as indicated by point A to point B in the figure.
[0017]
Next, a third embodiment will be described with reference to FIG. When a ground fault occurs inside the gas insulated switchgear, SF6 gas and decomposition products due to the ground fault arc are generated, and arc heat is generated. By using the material 11 and enclosing the label-type thermometer 14 on the inner surface, it is possible to detect arc heat from a ground fault location. In the event of a ground fault, the ground fault can be located by visually checking the label-type thermometer 14 from outside.
[0018]
【The invention's effect】
As described above, the location of the accident can be visually confirmed without opening the device or the gas-filled portion, and the time required for locating the accident point can be reduced. In addition, the gas insulated switchgear performs a measure such as mounting a shunt bar to supply a sheath current to a gas tank in which a sheath current flows in parallel with the main circuit conductor by an electromagnetic induction action. This sheath current is diverted to the gas pipe connected to the gas tank, and the gas pipe needs to be insulated so as not to cause incompatibility. By using an insulating material such as plastic for the transparent material portion of the locating device according to the present invention, the effect as a combined accident locating device having the function of an insulating joint is also recognized.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a first embodiment of the present invention.
FIG. 2 is a sectional view showing a second embodiment of the present invention.
FIG. 3 is a sectional view showing a third embodiment of the present invention.
FIG. 4 is a sectional view for explaining a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Transparent material 12 ... Litmus liquid application sheet 13 ... Spherical needle placement device 14 ... Label type thermometer

Claims (4)

ガス絶縁開閉装置の事故点標定装置において、ガス誘導部分に透明材料を使用した事故点標定部を設けたことを特徴とするガス絶縁開閉装置の事故点標定装置。An accident point locating device for a gas insulated switchgear, wherein an accident point locating unit using a transparent material is provided in a gas guiding portion. 前記事故点標定部としてリトマス液塗布シートを設けたことを特徴とする請求項1記載のガス絶縁開閉装置の事故点標定装置。The accident point locating device for a gas insulated switchgear according to claim 1, wherein a litmus liquid application sheet is provided as the accident point locating section. 前記事故点標定部として球形置針装置を封入したことを特徴とする請求項1記載のガス絶縁開閉装置の事故点標定装置。2. The accident point locating device for a gas insulated switchgear according to claim 1, wherein a spherical needle device is enclosed as the accident point locating unit. 前記事故点標定部としてラベル式温度計を設けたことを特徴とする請求項1記載のガス絶縁開閉装置の事故点標定装置。The accident point locating device for a gas insulated switchgear according to claim 1, wherein a label type thermometer is provided as the accident point locating unit.
JP2002283609A 2002-09-27 2002-09-27 Point of accident locator for gas-insulated switchgear Pending JP2004120944A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110514924A (en) * 2019-08-12 2019-11-29 武汉大学 The Winding in Power Transformer Fault Locating Method of depth convolutional neural networks fusion visual recognition

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110514924A (en) * 2019-08-12 2019-11-29 武汉大学 The Winding in Power Transformer Fault Locating Method of depth convolutional neural networks fusion visual recognition
CN110514924B (en) * 2019-08-12 2021-04-27 武汉大学 Power transformer winding fault positioning method based on deep convolutional neural network fusion visual identification

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