JP2018050465A - 電力系統保護用の連続無停止ac接地システム - Google Patents
電力系統保護用の連続無停止ac接地システム Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/50—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the appearance of abnormal wave forms, e.g. ac in dc installations
- H02H3/52—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the appearance of abnormal wave forms, e.g. ac in dc installations responsive to the appearance of harmonics
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/005—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to ionising radiation; Nuclear-radiation circumvention circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
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- Supply And Distribution Of Alternating Current (AREA)
- Protection Of Transformers (AREA)
Abstract
【解決手段】変圧器を含むAC系統に使用される連続接地システムであり、変圧器12の変圧器中性点10とアース14との間に接続されたスイッチ集合体202を備える。このスイッチ集合体は、開位置と閉位置を有し、開位置にすると電気的接続と変圧器中性点との間のスイッチ集合体を介した経路を遮断し、閉位置にすると前記電気的接続から変圧器中性点へスイッチ集合体を介して接続する経路を確立する、そして、AC電気装置の通常動作時にはスイッチ集合体は閉位置の状態となっている。変圧器の一つ以上の電力位相の高調波信号または変圧器中性点と前記アースとの間のDC電流のいずれかが所定の閾値となったことを検知すると、スイッチ集合体を開位置に作動させるように構成されたセンサを含む、制御回路を備える。
【選択図】図2
Description
本願は、2010年10月29日に出願された米国仮出願第61/408,319号、2011年1月6日に出願された米国仮出願第61/430,388号、2011年1月28日に出願された米国仮出願第61/437,498号、2011年5月16日に出願された米国仮出願第61/486,635号、2011年6月13日に出願された米国有用特許出願第13159,374号の優先権を主張し、これらはいずれも本明細書に引用により援用される。
前記回路に於いて、スイッチ集合体は電子制御入力を介して閉位置と開位置を移行可能で、前記電子制御入力は、変圧器の一つ以上の通電相に高調波信号が発生するかもしくは変圧器中性点とアースとの間のDC電流が所定の閾値となるとスイッチ集合体を開位置に作動させる。
C=I/ωV
ここで、Iはキャパシタを流れる電流、Vは印加された電圧、ωは印加された電圧の角周波数(ω=2πf)
抵抗遮断素子の場合、抵抗値は R=V/I で得られる。
Claims (11)
- 変圧器を含む交流系統で使用する接地回路であって、
(a)変圧器の変圧器中性点とアースとの間に接続されるスイッチ集合体であって、
(i)前記スイッチ集合体は、第一スイッチ機構と第二スイッチ機構とを備え、前記第二スイッチ機構は前記第一スイッチ機構が前記変圧器中性点における高電圧が原因で損傷するのを保護するようになっており、
(ii)前記スイッチ集合体は、前記第一スイッチ機構および前記第二スイッチ機構の少なくとも一つが開位置にある開位置と、前記第一スイッチ機構および前記第二スイッチ機構の両方が閉位置にある閉位置と、を有し、前記開位置にすると電気的接続とアース接続との間の前記スイッチ集合体を通る経路を遮断し、前記閉位置にすると電気的接続とアース接続とを前記スイッチ集合体を介して接続する経路を確立し、
(iii)前記スイッチ集合体は、電子制御入力に応じて動作するようになっており、
(iv)前記交流系統の通常動作時には前記スイッチ集合体は閉位置の状態になっている、スイッチ集合体と
(b)前記スイッチ集合体と並列に接続され、前記変圧器中性点と前記アースとの間に接続された遮断部と、を備え、
前記スイッチ集合体は、前記電子制御入力を介して前記閉位置と前記開位置との間を移行可能である
ことを特徴とする、接地回路。 - 前記電子制御入力は、(1)前記変圧器の少なくとも一つの相に高調波信号が発生するか、(2)前記変圧器中性点とアースとの間を流れるDC電流が所定の閾値に達するか、(3)前記変圧器中性点と前記アースとの間を流れる疑似DC電流が所定の閾値に達するか、のいずれかが起こると、前記スイッチ集合体を前記開位置にする
ことを特徴とする、請求項1に記載の接地回路。 - 前記第一スイッチ機構は、前記第二スイッチ機構と電気的に直列に接続される
ことを特徴とする、請求項1に記載の接地回路。 - 前記電子制御入力を介して前記スイッチ集合体と電気的に接続される制御回路を、さらに備える
ことを特徴とする、請求項1に記載の接地回路。 - 前記遮断部は、キャパシタを備える
ことを特徴とする、請求項1に記載の接地回路。 - 前記キャパシタと前記変圧器中性点との間に直列に接続される抵抗をさらに備える
ことを特徴とする、請求項1に記載の接地回路。 - 前記抵抗は、前記キャパシタのインピーダンスと整合するように選択される
ことを特徴とする、請求項6に記載の接地回路。 - 前記抵抗は、前記キャパシタと前記変圧器のインダクタンスによって発生する鉄共振を防止するために選択される高電力用抵抗器から成る
ことを特徴とする、請求項6に記載の接地回路。 - 前記制御回路に電気的に接続された電磁場検出器を、さらに備える
ことを特徴とする、請求項4に記載の接地回路。 - 前記制御回路は、電磁遮蔽された筐体内に配置され、前記スイッチ集合体と前記遮断部と前記電磁場検出器とは、前記電磁遮蔽された筐体の外側に配置される
ことを特徴とする、請求項9に記載の接地回路。 - 前記第一スイッチ機構は、前記所定の閾値を超えるDC電流を検知すると、前記電子制御入力に応じて前記開位置に移行する
ことを特徴とする、請求項1に記載の接地回路。
Applications Claiming Priority (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36608810P | 2010-07-20 | 2010-07-20 | |
US61/366,088 | 2010-07-20 | ||
US40831910P | 2010-10-29 | 2010-10-29 | |
US61/408,319 | 2010-10-29 | ||
US201161430388P | 2011-01-06 | 2011-01-06 | |
US61/430,388 | 2011-01-06 | ||
US201161437498P | 2011-01-28 | 2011-01-28 | |
US61/437,498 | 2011-01-28 | ||
US201161486635P | 2011-05-16 | 2011-05-16 | |
US61/486,635 | 2011-05-16 | ||
US13/159,374 US8878396B2 (en) | 2010-07-20 | 2011-06-13 | Continuous uninterruptable AC grounding system for power system protection |
US13/159,374 | 2011-06-13 |
Related Parent Applications (1)
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JP2016115759A Division JP6251322B2 (ja) | 2010-07-20 | 2016-06-09 | 電力系統保護用の連続無停止ac接地システム |
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JP2018050465A true JP2018050465A (ja) | 2018-03-29 |
JP6560731B2 JP6560731B2 (ja) | 2019-08-14 |
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JP2013520809A Active JP6008853B2 (ja) | 2010-07-20 | 2011-07-19 | 電力系統保護用の連続無停止ac接地システム |
JP2016115759A Active JP6251322B2 (ja) | 2010-07-20 | 2016-06-09 | 電力系統保護用の連続無停止ac接地システム |
JP2017226037A Active JP6560731B2 (ja) | 2010-07-20 | 2017-11-24 | 電力系統保護用の連続無停止ac接地システム |
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JP2013520809A Active JP6008853B2 (ja) | 2010-07-20 | 2011-07-19 | 電力系統保護用の連続無停止ac接地システム |
JP2016115759A Active JP6251322B2 (ja) | 2010-07-20 | 2016-06-09 | 電力系統保護用の連続無停止ac接地システム |
Country Status (13)
Country | Link |
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US (1) | US8878396B2 (ja) |
EP (1) | EP2596565B1 (ja) |
JP (3) | JP6008853B2 (ja) |
KR (1) | KR101911417B1 (ja) |
CN (1) | CN103222145B (ja) |
AU (1) | AU2011282288B2 (ja) |
BR (1) | BR112013001568B1 (ja) |
CA (1) | CA2805652C (ja) |
DK (1) | DK2596565T3 (ja) |
HK (1) | HK1186006A1 (ja) |
IL (1) | IL224228A (ja) |
MX (1) | MX2013000738A (ja) |
WO (1) | WO2012012426A2 (ja) |
Cited By (1)
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US20120019965A1 (en) | 2012-01-26 |
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JP6008853B2 (ja) | 2016-10-19 |
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WO2012012426A2 (en) | 2012-01-26 |
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