JP2001194409A - Apparatus and method for testing withstand voltage of gas insulated device - Google Patents
Apparatus and method for testing withstand voltage of gas insulated deviceInfo
- Publication number
- JP2001194409A JP2001194409A JP2000006307A JP2000006307A JP2001194409A JP 2001194409 A JP2001194409 A JP 2001194409A JP 2000006307 A JP2000006307 A JP 2000006307A JP 2000006307 A JP2000006307 A JP 2000006307A JP 2001194409 A JP2001194409 A JP 2001194409A
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- Prior art keywords
- gas
- withstand voltage
- electric field
- voltage test
- air
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はガス絶縁機器の絶縁
部品の絶縁特性を検証するガス絶縁機器の耐電圧試験装
置及び方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for testing the withstand voltage of gas-insulated equipment for verifying the insulation characteristics of insulating parts of the gas-insulated equipment.
【０００２】[0002]
【従来の技術】ガス絶縁機器には、例えば、ＳＦ６ガス
を略大気圧で封入したガス絶縁スイッチギヤ（Ｃ−ＧＩ
Ｓ）などがあり、高い信頼性と大幅な縮小化が計られ数
多くの変電所で使用されている。これは、ＳＦ6ガスの
高い絶縁耐力と、無毒、無臭の不活性ガスにより達成さ
れるものである。このガス絶縁機器の主絶縁には、例え
ばエポキシ樹脂からなる絶縁物が用いられているが、機
器内に組み込む前には部分放電特性や破壊電圧特性など
の絶縁特性を調べることがある。これは、初期不良の選
別を目的として行われるものである。一般的な試験装置
を図９に示す。１は試験用のタンク、４は試験電圧を印
加するブッシング、５は圧力計、６はタンク内が規定以
上に加圧された場合の放圧弁、７は開閉用バルブ、１９
は真空ポンプ、２０はＳＦ6ガスボンベである。タンク
１に図示しない供試の絶縁部品をセットして真空ポンプ
１９で真空引き後、 ＳＦ6ガスをＳＦ6ガスボンベ２０
より供給して部分放電試験や破壊電圧試験などを行う。
試験終了後には、真空ポンプ１９から図示していない水
分除去装置などを介して、不純物が除去されたＳＦ6ガ
スを回収して再利用がされている。2. Description of the Related Art For example, gas-insulated switchgear (C-GI) in which SF 6 gas is sealed at substantially atmospheric pressure is used for gas-insulated equipment.
S), etc., which are used in many substations because of their high reliability and significant downsizing. This is because the high dielectric strength of SF 6 gas, non-toxic, is intended to be achieved by odorless inert gas. An insulator made of, for example, epoxy resin is used for the main insulation of the gas-insulated equipment. However, before the gas-insulated equipment is incorporated in the equipment, insulation characteristics such as partial discharge characteristics and breakdown voltage characteristics are sometimes examined. This is performed for the purpose of selecting an initial failure. FIG. 9 shows a general test apparatus. 1 is a test tank, 4 is a bushing for applying a test voltage, 5 is a pressure gauge, 6 is a pressure relief valve when the inside of the tank is pressurized more than a specified value, 7 is an opening / closing valve, 19
Is a vacuum pump and 20 is a SF 6 gas cylinder. After vacuuming with a vacuum pump 19 by setting the test of insulation components (not shown) to the tank 1, the SF 6 gas SF 6 gas cylinder 20
And then perform a partial discharge test and breakdown voltage test.
After the end of the test, the SF 6 gas from which impurities have been removed is recovered from the vacuum pump 19 via a moisture removing device (not shown) and reused.
【０００３】これにより、ガス絶縁機器の定格ガス圧力
に合わせてタンク１内にＳＦ6ガスを加圧封入して絶縁
物の絶縁特性が求められていた。例えば、Ｃ−ＧＩＳで
は、０．１３ＭＰａ（絶対値、以下同様に表示）まで封
入していた。[0003] Accordingly, SF 6 gas is pressurized and sealed in the tank 1 in accordance with the rated gas pressure of the gas insulating equipment, and the insulating properties of the insulator have been required. For example, in C-GIS, it was sealed up to 0.13 MPa (absolute value, hereinafter similarly indicated).
【０００４】[0004]
【発明が解決しようとする課題】このような構成におい
て、絶縁的に信頼性の高いガス絶縁機器が達成されてき
た。ガス絶縁機器本体では、約３０年のメンテナンスフ
リーから内部を点検するためのＳＦ6ガス開放に伴う回
収はごく希であり万全の対応をしている。しかしなが
ら、絶縁部品の耐電圧試験では、数種類の絶縁部品を連
続で検証するため、一日で数回という多頻度でＳＦ6ガ
スの回収が必要となる。ここで、 ＳＦ6ガスは、地球
温暖化防止京都会議（１９９７年１２月）で温暖化に寄
与するガスとされ、温暖化の効果が炭酸ガスの２３００
０倍であり、大気に漏らしたり放出させることが規制さ
れた。このため、回収に伴う作業では、設備のなどの取
り扱いに細心の注意を払い、管理された工程の手順が決
められている。この回収作業を一日で数回という多頻度
で行うことは高度な作業が必要で困難性があった。これ
らのことから、 ＳＦ6ガスを使用しなければ前述の対
応は不要となるが、ＳＦ6ガスに優る絶縁媒体がないの
が現状であった。本発明は大気に放出することのできる
乾燥空気を用いてＳＦ6ガスと同程度の絶縁耐力を得
て、絶縁部品の耐電圧試験を行う耐電圧試験装置を提供
することを目的とする。In such a configuration, a gas-insulated device having high reliability in terms of insulation has been achieved. In the gas insulated equipment itself, the recovery associated with the release of SF 6 gas for inspecting the inside from the maintenance free for about 30 years is extremely rare and we are taking thorough measures. However, the withstand voltage test of the insulating part, to verify several types of insulating parts in a row, it is necessary to recovery of SF 6 gas at frequent as several times a day. Here, SF 6 gas is a gas contributing to global warming prevention of global warming Kyoto Conference (December 1997), 2300 the effect of warming the carbon dioxide
It is zero times and regulated to be released or released to the atmosphere. For this reason, in the work associated with collection, the handling of equipment and the like is paid close attention, and the procedure of the controlled process is determined. Performing this collection operation several times a day frequently requires a high level of operation and is difficult. For these reasons, if the SF 6 gas is not used, the above-mentioned measures are not necessary, but at present, there is no insulating medium superior to the SF 6 gas. SUMMARY OF THE INVENTION It is an object of the present invention to provide a withstand voltage test apparatus for obtaining a withstand voltage equivalent to that of SF 6 gas using dry air that can be released into the atmosphere, and for performing a withstand voltage test on an insulating component.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に本発明においては、ＳＦ6ガスと同程度の絶縁耐力を
得るために空気を少なくとも０．３５ＭＰａに加圧し、
かつ空気の相対湿度を９０％ＲＨ以下とし、供試の絶縁
部品に電圧を印加して耐電圧試験をするガス絶縁機器の
耐電圧試験装置を提供する。ＳＦ6ガスの代わりに空気
を用いてＳＦ6ガスと同程度の絶縁耐力を得られるので
ガス回収の必要がなく装置を簡単にできる。そのうえ空
気なので調達コストがかからない。In order to achieve the above object, according to the present invention, air is pressurized to at least 0.35 MPa in order to obtain the same dielectric strength as SF 6 gas,
In addition, the present invention provides a withstand voltage test apparatus for a gas insulated device that performs a withstand voltage test by applying a voltage to an insulating component to be tested with a relative humidity of air of 90% RH or less. Since using air in place of SF 6 gas is obtained with SF 6 gas and comparable dielectric strength can be simplified device without the need for gas recovery. In addition, because it is air, there is no procurement cost.
【０００６】[0006]
【発明の実施の形態】以下本発明によるガス絶縁機器の
絶縁部品における試験装置および方法の実施形態を図面
を参照して説明する。なお、従来方法と同一の構成にお
いては同一符号を記した。図１に耐電圧試験装置を示
す。１はタンク、２はコンプレッサ、３は湿度制御装
置、４はブッシング、５は圧力計、６は放圧弁、７はバ
ルブである。タンク１内には、図示していない絶縁部品
をセットし、コンプレッサ２から湿度制御装置３を介し
て乾燥空気が封入される。湿度制御装置３は、フィルタ
やシリカゲルなどでコンプレッサ２から送られてくる空
気の水分や塵埃などの不純物を除去する。出口には湿度
センサーがあり、水分除去が不十分な時にはフィードバ
ックがかかりコンプレッサ２からの風量を少なくするな
どして湿度を制御する。ブッシング４は電圧印加用のも
のである。圧力計５で圧力を測り、タンク１内が規定以
上に加圧された場合には放圧弁６で放圧する。バルブ７
を開閉させて空気の封入、放出を行う。このような構成
において、６６／７７ｋＶクラスのガス絶縁スイッチギ
ヤに一般的に用いられる支持がいしを供試して、圧力と
破壊電圧との特性を図２に示す。特性曲線（ａ）は乾燥
空気で、特性曲線（ｂ）はＳＦ6ガスである。図２から
ＳＦ6ガスの０．１ＭＰａと同程度の破壊電圧を得るた
めの乾燥空気の圧力は０．３５ＭＰａとなる。このこと
から、６６／７７ｋＶクラスの耐電圧が１６０ｋＶであ
ることから、乾燥空気を０．３５ＭＰａまで加圧すれば
耐電圧試験が行えることになる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a test apparatus and method for insulating parts of gas-insulated equipment according to the present invention will be described below with reference to the drawings. The same reference numerals are used for the same components as those of the conventional method. FIG. 1 shows a withstand voltage test apparatus. 1 is a tank, 2 is a compressor, 3 is a humidity control device, 4 is a bushing, 5 is a pressure gauge, 6 is a pressure relief valve, and 7 is a valve. Insulating parts (not shown) are set in the tank 1, and dry air is sealed from the compressor 2 via the humidity controller 3. The humidity control device 3 removes impurities such as moisture and dust in the air sent from the compressor 2 using a filter, silica gel, or the like. There is a humidity sensor at the outlet, and when moisture is not sufficiently removed, feedback is applied to control the humidity by reducing the air volume from the compressor 2 or the like. The bushing 4 is for applying a voltage. The pressure is measured by a pressure gauge 5, and when the pressure in the tank 1 is increased beyond a specified value, the pressure is released by a pressure relief valve 6. Valve 7
Is opened and closed to release and release air. In such a configuration, a support insulator generally used for a gas insulated switchgear of 66/77 kV class is tested, and the characteristics of pressure and breakdown voltage are shown in FIG. The characteristic curve (a) is for dry air, and the characteristic curve (b) is for SF 6 gas. From FIG. 2, the pressure of the dry air for obtaining a breakdown voltage approximately equal to 0.1 MPa of SF 6 gas is 0.35 MPa. From this, since the withstand voltage of the 66/77 kV class is 160 kV, the withstand voltage test can be performed by pressing dry air to 0.35 MPa.
【０００７】つまり、耐電圧試験にＳＦ6ガスにかわっ
て加圧した空気を使用すれば、試験終了後には大気に放
出することができる。このため、ＳＦ6ガスの取り扱い
が皆無となり、耐電圧試験が容易となり、環境に適した
試験方法となる。ここで、ＳＦ6ガスを０．２ＭＰａ以
下で封入したガス絶縁スイッチギヤ（Ｃ−ＧＩＳ）で
は、大気で耐電圧を保証している場合が多いので、乾燥
空気の圧力は０．３５ＭＰａでよい。なお、保証ガス圧
力が大気圧より加圧されたものについては、比例させて
乾燥空気の圧力を増せばいい。また、上述の電圧表記は
ＡＣ電圧であるが、インパルス電圧においても同様であ
る。次に、加圧した空気はコンプレッサなどで容易に作
ることができるが、不純物が混入しやすい。不純物の影
響を調べたものがないため、実験的に加圧した空気の耐
電圧特性を調べた。図３に実験に用いた電極形状を示
す。電極は球電極８と平板電極９からなり準平等電界を
形成し、Ｃ−ＧＩＳに用いられる代表的な電極構成とし
ている。この電極を用いて、空気の圧力を０．４ＭＰａ
と一定にして、湿度と破壊電圧との絶縁特性を図４に示
す。図４からこの実験に用いた電極形状では、破壊電圧
は湿度の変化に影響されないことがわかった。In other words, if pressurized air is used in place of SF 6 gas in the withstand voltage test, it can be released to the atmosphere after the test is completed. For this reason, SF 6 gas is not handled at all, and the withstand voltage test is facilitated, and the test method is suitable for the environment. Here, in a gas-insulated switchgear (C-GIS) in which SF 6 gas is sealed at 0.2 MPa or less, the withstand voltage is often guaranteed in the atmosphere, so the pressure of the dry air may be 0.35 MPa. When the guaranteed gas pressure is higher than the atmospheric pressure, the pressure of the dry air may be increased in proportion. Although the above-mentioned voltage notation is an AC voltage, the same applies to an impulse voltage. Next, pressurized air can be easily produced by a compressor or the like, but impurities are easily mixed therein. Since there was no study on the influence of impurities, the withstand voltage characteristics of the experimentally pressurized air were examined. FIG. 3 shows the electrode shapes used in the experiment. The electrode is composed of a spherical electrode 8 and a flat plate electrode 9 to form a quasi-equivalent electric field, and has a typical electrode configuration used for C-GIS. By using this electrode, the pressure of air is increased to 0.4 MPa.
FIG. 4 shows the insulation characteristics between humidity and breakdown voltage. From FIG. 4, it was found that the breakdown voltage was not affected by changes in humidity in the electrode shape used in this experiment.
【０００８】また、図５も実験に用いた電極形状を示
す。上下の電極１０―１、１０―２に絶縁物１１を挟ん
だ構成である。絶縁物１１には、上下に埋め込み電極１
２―１、１２―２を設けている。このような電極構成に
より絶縁物１１の沿面が準平等電界に制御でき、沿面の
絶縁特性の実験を行うことができる。このような電界分
布はＣ−ＧＩＳの代表的な構成である。この電極構成を
用いて、空気の圧力を０．４ＭＰａと一定にして、湿度
と破壊電圧との絶縁特性を図６に示す。図６から破壊電
圧は、相対湿度９０％ＲＨ以上（絶対湿度１０ｇ／ｍ３
以上）から急激に低下することが分かる。これは、沿面
付近に湿度が多くなると、電界分布が乱されて破壊電圧
が低下すると考えられる。これよりこの実験に用いた電
極形状においては、タンク１に封入する空気を相対湿度
９０％ＲＨ以下の乾燥空気にしなければならない。なお
この実験は、周囲の温度１２℃で行なっており、気温が
低下すれば飽和水蒸気圧が下がるので、その気温に合わ
せて相対湿度が９０％ＲＨ以下になるようにしなければ
ならない。なお、ＳＦ6ガス０．１ＭＰａと同程度の破
壊電圧を得るため圧力０．３５ＭＰａ、相対湿度９０％
ＲＨ以下とした乾燥空気をＳＦ6ガスにかわって使用す
ることは、ガス絶縁部品の耐電圧試験の時だけでなく、
ガス絶縁スイッチギヤ（Ｃ−ＧＩＳ）の絶縁そのものに
も適用できる。FIG. 5 also shows an electrode shape used in the experiment. In this configuration, an insulator 11 is interposed between upper and lower electrodes 10-1 and 10-2. The insulator 11 has embedded electrodes 1 at the top and bottom.
2-1 and 12-2 are provided. With such an electrode configuration, the creeping surface of the insulator 11 can be controlled to a quasi-equal electric field, and an experiment on the insulating properties of the creeping surface can be performed. Such an electric field distribution is a typical configuration of C-GIS. With this electrode configuration, the pressure of air is kept constant at 0.4 MPa, and the insulation characteristics between humidity and breakdown voltage are shown in FIG. According to FIG. 6, the breakdown voltage is 90% RH or more relative humidity (absolute humidity 10 g / m 3).
From the above, it can be seen that the temperature drops sharply. It is considered that when the humidity increases near the creepage, the electric field distribution is disturbed and the breakdown voltage decreases. Thus, in the electrode shape used in this experiment, the air to be filled in the tank 1 must be dry air having a relative humidity of 90% RH or less. Note that this experiment was performed at an ambient temperature of 12 ° C. Since the saturated water vapor pressure decreases as the temperature decreases, the relative humidity must be adjusted to 90% RH or less in accordance with the temperature. The pressure was 0.35 MPa and the relative humidity was 90% in order to obtain the same breakdown voltage as 0.1 MPa of SF 6 gas.
The use of dry air of RH or less in place of SF 6 gas is not only used during the withstand voltage test of gas insulating parts,
It can also be applied to the insulation of a gas insulated switchgear (C-GIS).
【０００９】次に、絶縁部品の耐電圧試験の場合は電界
緩和リングを取り付けて行うので、このリングに相当す
る半球棒電極と平板電極との絶縁特性を図7に示す。直
径１０ｍｍの半球棒電極と平板電極を用い、ギャップ長
を５０ｍｍとしたときの部分放電開始電圧特性を
（ａ）、破壊電圧特性を（ｂ）、直径５ｍｍの半球棒電
極と平板電極を用い、ギャップ長を５０ｍｍとしたとき
の部分放電開始電圧特性を（ｃ）、破壊電圧特性を
（ｄ）に示す。図７から、前者の電極構成では（ａ）と
（ｂ）の曲線がほぼ同じであり、後者の電極構成では
（ｃ）が（ｄ）よりも高くなり、特に圧力０．３ＭＰａ
付近で上に凸型の特性になることがわかる。これは後者
の電極構成においては、この圧力付近でコロナ安定化作
用が大きく働くと考えられる。つまり、 ＳＦ6ガスに
存在していた特性が、乾燥空気においても、圧力と破壊
電圧特性の間に特異点が生じることが見出された。な
お、ＳＦ6ガスの場合は、針電極などもっと不平等な電
界の時に特異点が生じるとされている。ここで、乾燥空
気の場合の特異点が生じる不平等な電界の目安を不平等
係数ｆで表示する。ｆは下記の簡易式から容易に算出で
きる。Next, the withstand voltage test of the insulating parts is performed by attaching an electric field relaxation ring. FIG. 7 shows the insulation characteristics between the hemispherical rod electrode and the plate electrode corresponding to this ring. Using a hemispherical rod electrode having a diameter of 10 mm and a flat plate electrode, a partial discharge starting voltage characteristic when the gap length was set to 50 mm, (a), a breakdown voltage characteristic (b), and using a hemispherical rod electrode having a diameter of 5 mm and a flat electrode, The partial discharge starting voltage characteristics when the gap length is 50 mm are shown in (c), and the breakdown voltage characteristics are shown in (d). From FIG. 7, the curves of (a) and (b) are almost the same in the former electrode configuration, and (c) is higher than (d) in the latter electrode configuration, in particular, the pressure is 0.3 MPa.
It can be seen that the characteristic becomes convex upward in the vicinity. This is thought to be due to the fact that the corona stabilizing action largely works around this pressure in the latter electrode configuration. That is, it has been found that the characteristic existing in the SF 6 gas has a singular point between the pressure and the breakdown voltage characteristic even in dry air. In the case of SF 6 gas, it is said that a singular point is generated in the case of a more uneven electric field such as a needle electrode. Here, a measure of an unequal electric field at which a singular point occurs in the case of dry air is indicated by an unequal coefficient f. f can be easily calculated from the following simple formula.
【００１０】[0010]
【数１】 ｒは棒電極先端の曲率半径、ｇはギャップ長である。図
７の（ａ）、（ｂ）はｆ＝９．９、（ｃ）、（ｄ）はｆ
＝１８．９となる。なお、ｆが更に大きい電極形状で
は、部分放電開始電圧と破壊電圧に差が出るものの、圧
力０．６ＭＰａ以下の領域では特異点が見られなかっ
た。このため、特異点が生じるのはｆ＝２０近傍と考え
てよい。このような電極形状の部分放電開始電圧特性と
破壊電圧特性の結果から、電界緩和リングを用いた絶縁
ブッシングの耐電圧試験装置を図８に示す。逆Ｔ字型の
接地の架台１３には絶縁ブッシング１４が取り付けら
れ、ブッシングの両端の中心導体には電界緩和リング１
５が取り付けられている。そして、これらをタンク１内
にセットして、一方の電界緩和リング１５―１にリード
線１６を接続して電圧を印加して絶縁特性の評価を行
う。他方の電界緩和リング１５―２には、固定用のボル
ト１７を貫通させた開口穴を覆う電極栓１８を設けてい
る。これにより、電界緩和リング１５―２は、見かけ上
の球電極となり電界緩和を図ることができる。この球電
極の曲率半径と架台１３までのギャップ長を適切に設定
すれば、目的に応じた耐電圧試験が可能となる。つま
り、部分放電特性と破壊電圧特性の両方を試験しようと
するならば、ｆ＝１０以下になる曲率半径とギャップ長
を選んだ電界緩和リングを用いればよい。また、耐電圧
試験をしようとするならば、ｆ＝２０程度になるような
電界緩和リングを選べばよい。なお、ｆが大きいほど、
曲率半径が小さくなり軽量化となるので、タンク１へセ
ットする作業が容易になる。(Equation 1) r is the radius of curvature of the tip of the rod electrode, and g is the gap length. FIGS. 7A and 7B show f = 9.9, and FIGS. 7C and 7D show f
= 18.9. In the case of an electrode shape having a larger f, although there is a difference between the partial discharge starting voltage and the breakdown voltage, no singular point was observed in the region where the pressure was 0.6 MPa or less. Therefore, it can be considered that the singular point occurs near f = 20. FIG. 8 shows a withstand voltage test apparatus for an insulating bushing using an electric field relaxation ring based on the results of the partial discharge start voltage characteristic and the breakdown voltage characteristic of such an electrode shape. An insulating bushing 14 is attached to the inverted T-shaped grounding pedestal 13, and an electric field relaxation ring 1 is provided at the center conductor at both ends of the bushing.
5 is attached. Then, these are set in the tank 1, the lead wire 16 is connected to one of the electric field relaxation rings 15-1, and a voltage is applied to evaluate the insulation characteristics. The other electric field relaxation ring 15-2 is provided with an electrode plug 18 that covers an opening hole through which a fixing bolt 17 passes. As a result, the electric field relaxation ring 15-2 becomes an apparent spherical electrode and can reduce the electric field. By appropriately setting the radius of curvature of the spherical electrode and the gap length up to the gantry 13, a withstand voltage test according to the purpose can be performed. That is, if both the partial discharge characteristics and the breakdown voltage characteristics are to be tested, an electric field relaxation ring having a radius of curvature and a gap length of f = 10 or less may be used. If a withstand voltage test is to be performed, an electric field relaxation ring that satisfies f = about 20 may be selected. In addition, as f is larger,
Since the radius of curvature is reduced and the weight is reduced, the work of setting the tank 1 is easy.
【００１１】電極栓１８がない場合、電界緩和リング１
７―２の開口穴の端部が鋭角なエッジとなり、極端な不
平等電界となる。このため、電界緩和リングの曲率半径
に見合った絶縁特性が得られず、部分放電開始電圧が低
下し、破壊電圧も同様に低いレベルであった。つまり、
加圧した乾燥空気では極端な不平等電界での耐電圧試験
はできないので、電界緩和を図ることが必要である。ち
なみにＳＦ6ガスでは、一般的に極端な不平等電界とな
る木綿針の実験において、コロナ安定化作用が働いて破
壊電圧が上昇するとされている。加圧した乾燥空気では
極端な不平等電界での耐電圧試験はできないので、電界
緩和を図ることが必要である。電界緩和リングは、部分
放電特性と破壊電圧特性の両方を試験するときはｆ＝１
０以下に、破壊電圧試験だけをするときはｆ＝２０程度
になるように選べば、目的に応じた耐電圧試験が可能と
なる。When the electrode plug 18 is not provided, the electric field relaxation ring 1
The end of the opening hole of 7-2 becomes a sharp edge, resulting in an extremely uneven electric field. For this reason, the insulating property corresponding to the radius of curvature of the electric field relaxation ring was not obtained, the partial discharge starting voltage was lowered, and the breakdown voltage was also at a low level. That is,
Since a withstand voltage test with an extremely uneven electric field cannot be performed with pressurized dry air, it is necessary to reduce the electric field. Incidentally, in the case of SF 6 gas, in a cotton needle experiment, which generally has an extremely unequal electric field, it is said that the corona stabilizing action works to increase the breakdown voltage. Since a withstand voltage test with an extremely uneven electric field cannot be performed with pressurized dry air, it is necessary to reduce the electric field. The electric field relaxation ring has f = 1 when testing both partial discharge characteristics and breakdown voltage characteristics.
If only the breakdown voltage test is performed to a value of 0 or less, the withstand voltage test according to the purpose can be performed by selecting f = about 20.
【００１２】[0012]
【発明の効果】本発明によれば、 ＳＦ6ガスの代わり
に乾燥空気を用いて絶縁部品の耐電圧試験を行うことが
できるので、試験終了後にガス回収などの作業が不要と
なりタンク内の乾燥空気を大気に放出することができ
る。According to the present invention, it is possible to perform the withstand voltage test of the insulating parts with dry air in place of SF 6 gas, dried in the tank becomes unnecessary operations such as gas recovered after the test Air can be released to the atmosphere.
【図１】本発明の実施形態におけるガス絶縁機器の耐電
圧試験装置の構成を示す図。FIG. 1 is a diagram showing a configuration of a withstand voltage test device for a gas insulated device according to an embodiment of the present invention.
【図２】本発明の実施形態におけるＳＦ6ガスと乾燥空
気における圧力と破壊電圧との絶縁特性を示す図。FIG. 2 is a diagram showing insulation characteristics between pressure and breakdown voltage in SF 6 gas and dry air in the embodiment of the present invention.
【図３】本発明の実施形態における実験に用いた電極形
状を示す図。FIG. 3 is a diagram showing electrode shapes used in an experiment according to the embodiment of the present invention.
【図４】本発明の実施形態における湿度と破壊電圧との
絶縁特性を示す図。FIG. 4 is a diagram showing insulation characteristics between humidity and breakdown voltage in the embodiment of the present invention.
【図５】本発明の実施形態における実験に用いた電極形
状を示す図。FIG. 5 is a diagram showing electrode shapes used in an experiment according to the embodiment of the present invention.
【図６】本発明の実施形態における湿度と破壊電圧との
絶縁特性を示す図。FIG. 6 is a diagram showing insulation characteristics between humidity and breakdown voltage in the embodiment of the present invention.
【図７】本発明の実施形態における半球棒電極と平板電
極との絶縁特性を示す図。FIG. 7 is a view showing insulation characteristics between a hemispherical rod electrode and a flat plate electrode according to the embodiment of the present invention.
【図８】本発明の実施形態における電界緩和リングを用
いた絶縁ブッシングの耐電圧試験装置を示す図。FIG. 8 is a diagram showing a withstand voltage test apparatus for an insulating bushing using an electric field relaxation ring according to an embodiment of the present invention.
【図９】従来の絶縁機器の耐電圧試験装置の構成を示す
図。FIG. 9 is a diagram showing a configuration of a conventional withstand voltage test apparatus for insulating equipment.
１…タンク ２…コンプレッサ ３…湿度制御装置 ４…ブッシング ５…圧力計 ６…放圧弁 ７…バルブ ８…球電極 ９…平板電極 １０…電極 １１…絶縁物 １２…埋め込み電極 １３…架台 １４…絶縁ブッシング １５…電界緩和リング １６…リード線 １７…ボルト １８…電極栓 １９…真空ポンプ ２０…ＳＦ6ガスボンベDESCRIPTION OF SYMBOLS 1 ... Tank 2 ... Compressor 3 ... Humidity control device 4 ... Bushing 5 ... Pressure gauge 6 ... Pressure relief valve 7 ... Valve 8 ... Ball electrode 9 ... Flat plate electrode 10 ... Electrode 11 ... Insulator 12 ... Embedded electrode 13 ... Stand 14 ... Insulation Bushing 15 ... Electric field relaxation ring 16 ... Lead wire 17 ... Bolt 18 ... Electrode plug 19 ... Vacuum pump 20 ... SF 6 gas cylinder
Claims (6)
る加圧手段と、空気の相対湿度を９０％ＲＨ以下にする
湿度制御手段と、供試の絶縁部品に電圧を印加する電圧
印加手段とを具備したことを特徴とするガス絶縁機器の
耐電圧試験装置。A pressure means for pressurizing air to at least 0.35 MPa, a humidity control means for adjusting the relative humidity of air to 90% RH or less, and a voltage applying means for applying a voltage to an insulating part to be tested. A withstand voltage test apparatus for gas-insulated equipment, comprising:
電界調整手段を具備したことを特徴とする請求項１記載
のガス絶縁機器の耐電圧試験装置。2. A withstand voltage test apparatus for gas-insulated equipment according to claim 1, further comprising electric field adjusting means for adjusting an electric field in said voltage applying means.
ＭＰａに加圧する第１の工程と、加圧した空気を湿度制
御手段を介して相対湿度を９０％ＲＨ以下に乾燥させる
第２の工程と、乾燥させ加圧した空気を絶縁部品が収納
された密閉箱体内に封入する第３の工程と、電圧印加手
段により絶縁部品に電圧を印加して耐電圧試験を行う第
４の工程と、試験終了後加圧した空気を大気に放出する
第５の工程とからなるガス絶縁機器の耐電圧試験方法。3. The pressurizing means removes at least 0.35 air.
A first step of pressurizing to MPa, a second step of drying the pressurized air to a relative humidity of 90% RH or less through a humidity control means, and an insulating component for storing the dried and pressurized air. A third step of enclosing in a closed box, a fourth step of applying a voltage to the insulating component by a voltage applying means to perform a withstand voltage test, and a fifth step of releasing pressurized air to the atmosphere after the test is completed. Method for testing the withstand voltage of gas-insulated equipment.
格ガス圧力を０．２０ＭＰａ以下とすることを特徴とす
る請求項３記載のガス絶縁機器の耐電圧試験方法。4. A withstand voltage test method for gas-insulated equipment according to claim 3, wherein the rated gas pressure of the insulating parts housed in said sealed box is 0.20 MPa or less.
電極に取り付けられた電界調整手段で電界を調整して耐
電圧試験を行うことを特徴とする請求項３または請求項
４記載のガス絶縁機器の耐電圧試験方法。5. The gas according to claim 3, wherein in the fourth step, a withstand voltage test is performed by adjusting an electric field by electric field adjusting means attached to the electrode of the insulating component. Withstand voltage test method for insulation equipment.
うに調整して、少なくとも破壊電圧試験を行うことを特
徴とする請求項５記載のガス絶縁機器の耐電圧試験方
法。6. A withstand voltage test method for gas-insulated equipment according to claim 5, wherein the electric field adjusting means is adjusted so as to generate a singular point, and at least a breakdown voltage test is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000006307A JP2001194409A (en) | 2000-01-12 | 2000-01-12 | Apparatus and method for testing withstand voltage of gas insulated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000006307A JP2001194409A (en) | 2000-01-12 | 2000-01-12 | Apparatus and method for testing withstand voltage of gas insulated device |
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| JP2001194409A true JP2001194409A (en) | 2001-07-19 |
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| JP2000006307A Pending JP2001194409A (en) | 2000-01-12 | 2000-01-12 | Apparatus and method for testing withstand voltage of gas insulated device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011233310A (en) * | 2010-04-26 | 2011-11-17 | Toshiba Corp | Vacuum circuit breaker |
| JP2011252792A (en) * | 2010-06-02 | 2011-12-15 | Fuji Electric Co Ltd | Testing device and testing method |
| KR101269020B1 (en) | 2011-10-10 | 2013-06-04 | 한국전력공사 | Apparatus and method for testing gas insulation switchgear using dry air |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011233310A (en) * | 2010-04-26 | 2011-11-17 | Toshiba Corp | Vacuum circuit breaker |
| JP2011252792A (en) * | 2010-06-02 | 2011-12-15 | Fuji Electric Co Ltd | Testing device and testing method |
| US20110309850A1 (en) * | 2010-06-02 | 2011-12-22 | Fuji Electric Co., Ltd. | Testing device and testing method |
| CN102313864A (en) * | 2010-06-02 | 2012-01-11 | 富士电机株式会社 | Testing apparatus and method of testing |
| US8610446B2 (en) | 2010-06-02 | 2013-12-17 | Fuji Electric Co., Ltd. | Testing device and testing method |
| KR101269020B1 (en) | 2011-10-10 | 2013-06-04 | 한국전력공사 | Apparatus and method for testing gas insulation switchgear using dry air |
| CN103823167A (en) * | 2014-03-14 | 2014-05-28 | 云南电力试验研究院（集团）有限公司电力研究院 | 2MV portable fast-front-edge compact type site-impact testing device for power and control method thereof |
| US11509121B2 (en) * | 2016-08-19 | 2022-11-22 | Siemens Aktiengesellschaft | Electrical energy transmission device and life cycle management |
| KR20180138454A (en) | 2017-06-21 | 2018-12-31 | 현대일렉트릭앤에너지시스템(주) | Guage apparatus for gas insulated switchgear |
| WO2019096589A1 (en) * | 2017-11-17 | 2019-05-23 | Siemens Aktiengesellschaft | Method for filling a container, and service device for carrying out the method |
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