WO2012137444A1 - 密閉型開閉装置 - Google Patents
密閉型開閉装置 Download PDFInfo
- Publication number
- WO2012137444A1 WO2012137444A1 PCT/JP2012/002141 JP2012002141W WO2012137444A1 WO 2012137444 A1 WO2012137444 A1 WO 2012137444A1 JP 2012002141 W JP2012002141 W JP 2012002141W WO 2012137444 A1 WO2012137444 A1 WO 2012137444A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal powder
- high voltage
- voltage conductor
- film
- fine metal
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/063—Totally-enclosed installations, e.g. in metal casings filled with oil or gas
Definitions
- Embodiments described herein relate generally to a hermetic switchgear that improves insulation performance.
- a hermetic switchgear is adopted as a gas insulated switchgear.
- the hermetic switchgear is configured by housing a high-voltage conductor in a hermetically sealed container and enclosing an insulating gas. Since it is desired to reduce the cost and environmental load of the hermetic switchgear, it is aimed to reduce the size of the device. Therefore, airtight containers are being made more compact by rationalizing insulation design and integrating three phases.
- the size of the hermetic container of the hermetic switchgear is basically determined based on insulation and thermal design.
- the degree of influence on the insulation performance when metal powder is present in the sealed container should be considered. This point will be specifically described with reference to FIGS.
- a high voltage conductor 1 is supported by an insulator 2 and an insulating gas 3 is sealed inside the sealed container 4.
- an insulating gas 3 is sealed inside the sealed container 4.
- the fine metal powder 5 When the fine metal powder 5 is present inside the sealed container 4, the fine metal powder 5 floats as the insulating gas 3 is enclosed in the sealed container 4. Some of the fine metal powders 5 floating in the hermetic container 4 continue to float in the vicinity of the high voltage conductor 1 for a considerable time, while others adhere to the high voltage conductor 1 itself.
- the former is called the nearby metal powder 6 and the latter is called the attached metal powder 7.
- the adhered metal powder 7 causes a local electric field concentration 9 on the high voltage conductor 1.
- a high voltage such as a lightning impulse voltage
- the locally concentrated electric field 9 may exceed the breakdown electric field of the insulating gas 3 and possibly cause a dielectric breakdown.
- the nearby metal powder 6 and the adhered metal powder 7 may cause dielectric breakdown, the presence of these metal powders 6 and 7 is a limiting condition for the insulation design. Therefore, it is required to perform an insulation design so that the withstand voltage performance is not affected even if the nearby metal powder 6 or the adhered metal powder 7 exists.
- One way to meet this requirement is to keep the surface electric field 8 of the high voltage conductor 1 low.
- the strength of the surface electric field 8 depends on the distance between the high voltage conductor 1 and the inner surface of the sealed container 4, if the strength of the surface electric field 8 is lowered, the high voltage conductor 1 and the inner surface of the sealed container 4 must be separated. . In other words, the presence of the nearby metal powder 6 and the adhered metal powder 7 has been a factor that causes the sealed container 4 to become large.
- Patent Literature 1 Japanese published patent gazettes and Japanese Patent Laid-Open No. 2004-40970 (hereinafter referred to as Patent Literature 1). This insulating coating technique will be described with reference to FIG. In the hermetic switch shown in FIG. 7, the outer surface of the high voltage conductor 1 is coated with an insulating film 11 such as epoxy.
- the surface of the high voltage conductor 1 has a micron-order sharp unevenness 14, which is covered with an insulating film 11. Thereby, it is possible to suppress the initial electron supply necessary for the discharge from the surface of the high voltage conductor 1 to the insulating gas 3.
- the minute gap 10 between the high voltage conductor 1 and the floating nearby metal powder 6 is not generated. Discharge can be prevented. Further, even if the adhered metal powder 7 exists on the high voltage conductor 1, it is possible to prevent the occurrence of dielectric breakdown by suppressing the initial electron supply from the surface of the high voltage conductor 1.
- the field emission of initial electrons from the surface of the high voltage conductor 1 can be suppressed by coating the surface of the high voltage conductor 1 with the insulating film 11. Thereby, the surface electric field 8 of the high voltage conductor 1 is made high, and the airtight container 4 is made compact.
- the charge polarity of the fine metal powder 5 is a charged charge, it is kept constant for a long time. As a result, the charge polarity of the fine metal powder 5 and the polarity of the AC applied voltage to the high voltage conductor 1 are often different, and the fine metal powder 5 has an electrostatic action in the direction of adsorbing to the surface of the insulating film 11. . Therefore, the fine metal powder 5 stays on the surface of the insulating film 11 and is easily accumulated.
- the nearby metal powder 6 and the adhered metal powder 7 are a constraint on the insulation design, so it is desirable to avoid the generation of these metal powders 6 and 7. Therefore, in order to ensure excellent insulation reliability and downsizing in the hermetic switchgear, in addition to suppressing initial electrons radiated from the surface of the high voltage conductor 1, a fine metal on the surface of the high voltage conductor 1 is used. It has been a problem to reliably prevent the accumulation and accumulation of the powder 5.
- Embodiments of the present invention have been made to solve the above-described problems, and the purpose of the present invention is to allow fine metal powder existing on the surface of the high voltage conductor to stay and accumulate on the surface of the high voltage conductor or in the vicinity thereof.
- An object of the present invention is to provide a compact switchgear with high insulation reliability by preventing initial electron supply from the surface of a high-voltage conductor, which is necessary for the occurrence of dielectric breakdown.
- an embodiment of the present invention has the following configuration. That is, in a hermetic switchgear in which a high voltage conductor supported by an insulator is sealed inside a container filled with an insulating gas, a resistance film having a resistance characteristic is provided on the surface of the high voltage conductor. Yes.
- Sectional drawing of 1st Embodiment which concerns on this invention The principal part sectional view for explaining the operation effect of a 1st embodiment.
- the principal part sectional view for explaining the operation effect of a 1st embodiment Sectional drawing of 2nd Embodiment which concerns on this invention.
- Sectional drawing of the conventional closed type switchgear Explanatory drawing in case near metal powder exists. Explanatory drawing in case adhesion metal powder exists.
- FIG. 1 A first embodiment according to the present invention will be described with reference to FIGS.
- the surface of the high voltage conductor 1 is coated with a resistance film 12 having resistance characteristics.
- the resistance film 12 is made of a material powder having resistance characteristics or a resin mixed with the powder.
- the volume resistivity of the resistive film 12 is set to 1E7 ⁇ ⁇ cm or more and 1E11 ⁇ ⁇ cm or less.
- the fine metal powder 5 should have adhered to the resistive film 12 as shown in FIG.
- the electrostatic force 16 acting on the metal powder 5 can be set to a direction in which the metal powder 5 is detached from the periphery of the high voltage conductor 1 (upward direction in FIG. 3), even if the fine metal powder 5 adheres to the resistance film 12. Even so, the metal powder 5 is easily detached from the high-voltage conductor 1.
- the resistance film 12 acts as an insulating film because the time constant of the resistance film 12 is long with respect to the duration of the lightning impulse. Will do. Therefore, the field emission of the initial electrons from the surface of the high voltage conductor 1 can be suppressed, and the discharge from the surface of the high voltage conductor 1 to the insulating gas 3 can be prevented, and the occurrence of dielectric breakdown can be reliably prevented. is there.
- the resistance film 12 covers the unevenness 14 on the order of microns on the surface of the high voltage conductor 1. Therefore, the initial electron supply from the surface of the high voltage conductor 1 can be suppressed. Therefore, the discharge of the minute gap 10 between the high voltage conductor 1 and the floating metal powder 5 can be reliably prevented.
- the initial electron supply from the surface of the high voltage conductor 1 is suppressed by the coating of the resistance film 12, and at the same time, even if the resistance film 12 and the fine metal powder 5 are charged, Because of the resistance film 12, the fine metal powder 5 can be prevented from staying and accumulating on the surface.
- the fine metal powder 5 exists in the sealed container 4, it is rare that the metal powder 5 becomes the nearby metal powder 6 or the attached metal powder 7, and the insulation performance by the metal powders 6 and 7 is improved. Can be avoided. As a result, the surface electric field 8 of the high voltage conductor 1 can be increased, and the compactness of the sealed container 4 can be sufficiently promoted.
- the second embodiment is characterized in that the resistance film 12 shown in FIG. 1 is composed of a diamond-like carbon (hereinafter referred to as DLC film) 13. To do.
- DLC film diamond-like carbon
- the second embodiment having the above configuration has the following unique operational effects in addition to the operational effects of the first embodiment. That is, in the second embodiment, the DLC film 13 used as the resistance film 12 has extremely good lubricity and peelability on the film surface.
- the residence time of the fine metal powder 5 in the DLC film 13 can be significantly shortened, and the influence on the insulation performance by the fine metal powder 5 can be surely avoided.
- the DLC film 13 can easily change its volume resistivity, a desired volume resistivity can be easily obtained.
- the charge polarity of the metal powder 5 attached to the resistance film 12 can be easily made the same as the polarity of the AC voltage applied to the high voltage conductor 1, and the metal powder 5 is excluded from the periphery of the high voltage conductor 1. It is possible. That is, the fine metal powder 5 does not adhere to the surface of the high voltage conductor 1 and does not stay around the surface, and the surface electric field 8 of the high voltage conductor 1 is further increased to further reduce the size and improve the insulation reliability. Can be achieved.
- the present invention can be applied to a hermetic switchgear.
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Gas-Insulated Switchgears (AREA)
- Installation Of Bus-Bars (AREA)
- Elimination Of Static Electricity (AREA)
- Insulating Bodies (AREA)
Abstract
Description
[構成]
図1~図3を用いて、本発明に係る第1の実施形態について説明する。図1に示すように、本発明に係る第1の実施形態は、高電圧導体1表面に、抵抗特性を有する抵抗膜12がコーティングされている。抵抗膜12は、抵抗特性を有する材料粉もしくはこれを混入させた樹脂から構成されている。また、抵抗膜12の体積抵抗率は1E7Ω・cm以上で且つ1E11Ω・cm以下に設定されている。
以上のような構成を有する第1の実施形態では、図2に示すように、仮に抵抗膜12が帯電した場合でも、帯電電荷17を抵抗膜12の漏れ抵抗RLを通して比較的短時間で漏洩させることができる。つまり、抵抗膜12は直流電界を短時間で減衰させることが可能であり、集塵性を低減させることができる。したがって、抵抗膜12はその表面に微細金属粉5を集め難く、仮に抵抗膜12付近に微細金属粉5が浮遊、飛来していても、微細金属粉5が抵抗膜12表面に付着することがない。
[構成]
続いて、図4を用いて第2の実施形態を説明する。図4に示すように、第2の実施形態は、図1に示した抵抗膜12を、ダイヤモンドライクカーボン膜(Diamond-like Carbon)(以下、DLC膜という))13から構成したことを特徴とするものである。
以上の構成を有する第2の実施形態では、上記第1の実施形態の持つ作用効果に加えて、次のような独自の作用効果を有している。すなわち、第2の実施形態において、抵抗膜12として用いたDLC膜13は、膜表面の潤滑性や剥離性が極めて良好である。
なお、本明細書はおいては、本発明に係る複数の実施形態を説明したが、これらの実施形態は例として提示したものであって、発明の範囲を限定することを意図していない。これらの実施形態は、その他の様々な形態で実施されるこが可能であり、発明の範囲を逸脱しない範囲で、種々の省略や置き換え、変更を行うことが可能である。これらの実施形態やその変形例は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。
2…絶縁物
3…絶縁ガス
4…容器
5…微細金属粉
6…近傍金属粉
7…付着金属粉
8…表面電界
9…局所電界集中
10…微小ギャップ
11…絶縁膜
12…抵抗膜
13…DLC膜
14…高電圧導体上の凹凸
15…高電圧導体からの電荷
16…静電気力
17…帯電電荷
Claims (3)
- 絶縁性ガスを封入した容器内部に、絶縁物で支持した高電圧導体を密閉してなる密閉型開閉装置において、
前記高電圧導体表面に、抵抗特性を有する材料もしくはこれを混入させた樹脂からなる抵抗膜を設ける密閉型開閉装置。
- 前記抵抗膜は、その体積抵抗率を1E7Ω・cm以上で且つ1E11Ω・cm以下とする請求項1に記載の密閉型開閉装置。
- 前記抵抗膜をダイヤモンドライクカーボンから構成する請求項1又は2に記載の密閉型開閉装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112013025389A BR112013025389A2 (pt) | 2011-04-01 | 2012-03-28 | quadro de distribuição blindado |
CN201280015417.4A CN103444035B (zh) | 2011-04-01 | 2012-03-28 | 封闭型开关装置 |
EP12768192.2A EP2696459A4 (en) | 2011-04-01 | 2012-03-28 | HERMETICALLY SEALED SWITCHING APPARATUS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011082295A JP5738655B2 (ja) | 2011-04-01 | 2011-04-01 | 密閉型開閉装置 |
JP2011-082295 | 2011-04-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012137444A1 true WO2012137444A1 (ja) | 2012-10-11 |
Family
ID=46968858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/002141 WO2012137444A1 (ja) | 2011-04-01 | 2012-03-28 | 密閉型開閉装置 |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2696459A4 (ja) |
JP (1) | JP5738655B2 (ja) |
CN (1) | CN103444035B (ja) |
BR (1) | BR112013025389A2 (ja) |
WO (1) | WO2012137444A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014097729A1 (ja) * | 2012-12-21 | 2014-06-26 | 三菱電機株式会社 | ガス絶縁電気機器 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2950407A1 (de) * | 2014-05-28 | 2015-12-02 | Siemens Aktiengesellschaft | Vorrichtung zur Leitung elektrischen Gleichstroms |
WO2016006137A1 (ja) * | 2014-07-10 | 2016-01-14 | 三菱電機株式会社 | ガス絶縁電気機器およびガス絶縁電気機器の製造方法 |
JP2016208670A (ja) * | 2015-04-22 | 2016-12-08 | 株式会社東芝 | 密閉型開閉装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000184563A (ja) * | 1998-12-14 | 2000-06-30 | Mitsubishi Electric Corp | ガス絶縁機器母線 |
JP2002152927A (ja) * | 2000-11-10 | 2002-05-24 | Toshiba Corp | 複合絶縁方式ガス絶縁開閉装置 |
JP2004040970A (ja) | 2002-07-05 | 2004-02-05 | Toshiba Corp | ガス絶縁機器 |
JP2009077579A (ja) * | 2007-09-21 | 2009-04-09 | Toshiba Corp | 絶縁物および開閉装置 |
JP2010022081A (ja) * | 2008-07-08 | 2010-01-28 | Toshiba Corp | ガス絶縁機器 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3856978A (en) * | 1974-02-21 | 1974-12-24 | Westinghouse Electric Corp | Adherent coating for captivating small particles in gas-insulated electrical equipment |
JP2003023725A (ja) * | 2001-07-05 | 2003-01-24 | Toshiba Corp | 電気機器の絶縁支持体 |
JP5135263B2 (ja) * | 2009-03-06 | 2013-02-06 | 株式会社東芝 | 密閉型絶縁装置 |
-
2011
- 2011-04-01 JP JP2011082295A patent/JP5738655B2/ja active Active
-
2012
- 2012-03-28 WO PCT/JP2012/002141 patent/WO2012137444A1/ja active Application Filing
- 2012-03-28 BR BR112013025389A patent/BR112013025389A2/pt not_active IP Right Cessation
- 2012-03-28 EP EP12768192.2A patent/EP2696459A4/en not_active Withdrawn
- 2012-03-28 CN CN201280015417.4A patent/CN103444035B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000184563A (ja) * | 1998-12-14 | 2000-06-30 | Mitsubishi Electric Corp | ガス絶縁機器母線 |
JP2002152927A (ja) * | 2000-11-10 | 2002-05-24 | Toshiba Corp | 複合絶縁方式ガス絶縁開閉装置 |
JP2004040970A (ja) | 2002-07-05 | 2004-02-05 | Toshiba Corp | ガス絶縁機器 |
JP2009077579A (ja) * | 2007-09-21 | 2009-04-09 | Toshiba Corp | 絶縁物および開閉装置 |
JP2010022081A (ja) * | 2008-07-08 | 2010-01-28 | Toshiba Corp | ガス絶縁機器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2696459A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014097729A1 (ja) * | 2012-12-21 | 2014-06-26 | 三菱電機株式会社 | ガス絶縁電気機器 |
CN104919667A (zh) * | 2012-12-21 | 2015-09-16 | 三菱电机株式会社 | 气体绝缘电气设备 |
US9508507B2 (en) | 2012-12-21 | 2016-11-29 | Mitsubishi Electric Corporation | Gas insulated electrical equipment |
Also Published As
Publication number | Publication date |
---|---|
BR112013025389A2 (pt) | 2016-12-13 |
CN103444035A (zh) | 2013-12-11 |
CN103444035B (zh) | 2016-08-17 |
EP2696459A4 (en) | 2014-09-10 |
EP2696459A1 (en) | 2014-02-12 |
JP5738655B2 (ja) | 2015-06-24 |
JP2012217308A (ja) | 2012-11-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5135263B2 (ja) | 密閉型絶縁装置 | |
JP5859142B2 (ja) | ガス絶縁電気機器 | |
JP5738655B2 (ja) | 密閉型開閉装置 | |
RU2543984C2 (ru) | Компактный вакуумный прерыватель с избирательным инкапсулированием | |
JPWO2014112123A1 (ja) | ガス絶縁開閉装置 | |
JPWO2016080018A1 (ja) | ガス絶縁開閉装置 | |
CN106133869B (zh) | 断路设备 | |
JP6067150B2 (ja) | ガス絶縁電気機器 | |
JP2016033861A (ja) | コンデンサブッシング及びその製造方法 | |
JP4764139B2 (ja) | ガス絶縁開閉装置と油入変圧器の接続構造 | |
JP5044345B2 (ja) | 開閉装置 | |
WO2017141474A1 (ja) | ガス絶縁電気機器 | |
JP6807276B2 (ja) | 絶縁スペーサ及びそれを用いたガス絶縁開閉装置 | |
JP2008172976A (ja) | 直流ガス絶縁母線 | |
CN207009266U (zh) | 一种干式变电器静电屏蔽装置 | |
JP2015220261A (ja) | 変換器用変圧器 | |
JP7374668B2 (ja) | 電気機器 | |
WO2019206808A1 (en) | Electromechanical actuator and high voltage (hv) switch | |
JP2014007887A (ja) | ガス絶縁開閉装置 | |
US10862362B2 (en) | Corona shielding system and electrical machine | |
AU9290898A (en) | Insulation for a conductor | |
JP2009054400A (ja) | コンデンサユニットおよび密閉型開閉装置 | |
JP2002152927A (ja) | 複合絶縁方式ガス絶縁開閉装置 | |
JP2011100904A (ja) | 静止誘導電器 | |
JP6640651B2 (ja) | ガス絶縁型負荷時タップ切換装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12768192 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012768192 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112013025389 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112013025389 Country of ref document: BR Kind code of ref document: A2 Effective date: 20131001 |