EP2128882B1 - Hochspannungsschutzschalter - Google Patents

Hochspannungsschutzschalter Download PDF

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Publication number
EP2128882B1
EP2128882B1 EP08157339A EP08157339A EP2128882B1 EP 2128882 B1 EP2128882 B1 EP 2128882B1 EP 08157339 A EP08157339 A EP 08157339A EP 08157339 A EP08157339 A EP 08157339A EP 2128882 B1 EP2128882 B1 EP 2128882B1
Authority
EP
European Patent Office
Prior art keywords
corona ring
circuit breaker
corona
terminals
current interrupter
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.)
Active
Application number
EP08157339A
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English (en)
French (fr)
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EP2128882A1 (de
Inventor
Johan Lidholm
Fredrik Jansson
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.)
Hitachi Energy Ltd
Original Assignee
ABB Technology AG
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Publication date
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Application filed by ABB Technology AG filed Critical ABB Technology AG
Priority to AT08157339T priority Critical patent/ATE516592T1/de
Priority to ES08157339T priority patent/ES2369343T3/es
Priority to EP08157339A priority patent/EP2128882B1/de
Priority to RU2009119057/07A priority patent/RU2496174C2/ru
Priority to CN200910159501.3A priority patent/CN101604595B/zh
Publication of EP2128882A1 publication Critical patent/EP2128882A1/de
Application granted granted Critical
Publication of EP2128882B1 publication Critical patent/EP2128882B1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring

Definitions

  • the present invention relates to a high voltage live tank circuit breaker.
  • circuit breakers are divided in two classes: live tank circuit breakers (LTB) where the enclosure that contains the breaking mechanism is at line potential and the metal enclosed circuit breakers (MEB) where the enclosures are at earth potential.
  • LTB live tank circuit breakers
  • MEB metal enclosed circuit breakers
  • the live tank circuit breakers at high voltage levels have to handle the high potential at the terminal electrodes where the tubes or cables are connected to pass the current through the circuit breaker.
  • the high potential creates high electrical field stress at the terminal electrodes.
  • the terminal electrodes are shielded with corona rings, which purpose is to reduce the local electrical field stress by their smooth shape and relatively large area compared to the terminals.
  • corona rings Two different corona ring designs are common. Either the corona rings are placed as close to the terminal electrode as possible. If capacitors or pre-insertion resistors are used the same philosophy is used. Alternatively, a circular corona ring is placed symmetrically around the circuit breaker center axis.
  • the live tank circuit breaker external isolation media is air.
  • the external insulation is verified with dielectric tests following the requirements in applicable standards. These verifying tests for high voltage circuit breakers include both dry and wet tests since the high voltage circuit breaker is an out door equipment.
  • Document FR 2 707 713 discloses a device according to the preamble of claim 1.
  • the water drops will be affected by the high voltage and change shape; they will be sharper then normal and increase the local electrical field stress.
  • the invention is based on the realization that during switching over voltages during wet conditions the local electrical field at the corona rings lower part will increase in comparison to dry conditions.
  • An object of the present invention is therefore to provide a high voltage live tank circuit breaker with an improved dielectric withstand capability, in particular during wet conditions.
  • a further object of the invention is to provide such a high voltage circuit breaker, which is robust, accurate, uncomplicated, space-saving, and inexpensive, and which has an optimum performance and which fulfills existing safety requirements.
  • a high voltage live tank circuit breaker comprising a support insulator, a horizontally arranged elongated current interrupter provided on the support insulator, terminals connected to the ends of the current interrupter, and at least one corona ring arranged to at least partly surround at least one of the terminals.
  • the corona ring is arranged such that the vertical distance between the inner surface of the lower end of the corona ring and a center axis of the horizontally arranged elongated current interrupter is between about 1.5 and about 4 times shorter than the distance between the inner surface of the upper end of the corona ring and the center axis.
  • the high voltage live tank circuit breaker comprises-a horizontally arranged elongated capacitor and/or resistor connected between the terminals in parallel with the current interrupter, the above distances are measured with respect to the center axis of the current interrupter, the capacitor, if present, or the resistor, if present, whichever being located lowest.
  • the high voltage circuit breaker By the high voltage circuit breaker according to the invention, a more evenly distributed electrical field around the corona ring is obtained in presence of water. As a result the high voltage circuit breaker gets improved dielectric withstand capability in wet conditions.
  • high voltage will be used for voltages of 1 kV and higher. It shall, however, be noted that the present invention is primarily intended for high voltage circuit breakers with much higher voltage ratings, such as 245 kV and above.
  • Fig. 1 illustrates schematically in a side elevation view a one-phase high voltage live tank circuit breaker, which comprises two horizontally arranged and serially connected elongated current interrupters 10 arranged on a support insulator 20.
  • the current interrupters 10 may be referred to as breaker or extinguishing chambers and the assembly of two current interrupters 10 may be referred to as a breaking unit.
  • Each of the current interrupters 10 is connected to a terminal 30 at its far end and to a connection flange 32 at its inner end.
  • the circuit breaker comprises a respective corona ring 40 arranged to at least partly surround the terminal 30 connected to the far ends of the serially interconnected current interrupters 10, that is, typically no corona rings are arranged around the connection flanges 32, which interconnects the current interrupters 10.
  • Fig. 2 illustrates schematically in an end view one of the current interrupters 10 and one of the corona rings 40 of the high voltage circuit breaker of Fig. 1 .
  • the supports 41 holding the corona ring 40 are illustrated.
  • each of the corona rings 40 is located such that the vertical distance d1 between the inner surface of the lower end of the corona ring 40 and a center axis 10a of the current interrupter 10 is between about 1.5 and about 4 times shorter than the distance d2 between the inner surface of the upper end of the corona ring 40 and the center axis 10a.
  • the vertical distance d1 between the inner surface of the lower end of the corona ring 40 and the center axis 10a is between about 2 and about 3 times, and preferably about 7/3, shorter than the distance d2 between the inner surface of the upper end of the corona ring and the center axis.
  • the distance d1 is between 20 and 40 %, preferably between 25 and 33 %, and most preferably about 30 %, of the sum of the distances d1 and d2.
  • the corona rings 40 may be closed or open-ended and they can have different shapes, though the corona rings 40 in Figs. 1-2 are torus shaped. Provided that the corona rings are arranged symmetrically around the current interrupters 10 in the lateral plane the sum of the distances d1 and d2 corresponds to the inner diameter of the corona rings 40.
  • corona rings there can be arranged more corona rings around each terminal.
  • the corona rings are provided in pairs with a short fixed distance in between.
  • circuit breaker may, for each current interrupter, comprise a horizontally arranged elongated capacitor and/or resistor connected between the terminals in parallel with the current interrupter.
  • each corona ring is arranged such that the vertical distance between the inner surface of the lower end of the corona ring 40 and a center axis of the current interrupter (10), of the elongated capacitor, or of the resistor, whichever being located lowest, is between about 1.5 and about 4 times shorter than the distance between the inner surface of the upper end of the corona ring and that center axis.
  • Figs. 3 and 4 illustrate circuit breakers with the above mentioned capacitor and/or resistor.
  • Fig. 3 illustrates schematically in an end view a current interrupter 10, a capacitor 50 and a corona ring 40 as being comprised in a high voltage circuit breaker according to an embodiment of the invention.
  • the corona ring 40 has an upper essentially horizontal bar 40a and a lower essentially horizontal bar 40b and the vertical distance d1+d2 between the inner surface of the lower end of the corona ring and the inner surface of the upper end of the corona ring is the distance between the bars 40a-b.
  • the central axis 50a of the capacitor 50 is located below the central axis 10a of the current interrupter 10.
  • the corona ring 40 is arranged as above with respect to the central axis 50a of the capacitor 50.
  • the distances d1 and d2 are indicated in Fig. 3 , whereas the corona ring supports have been omitted.
  • Fig. 4 illustrates schematically in an end view a current interrupter 10, a capacitor 50, a resistor 60 and a corona ring 40 as being comprised in a high voltage circuit breaker according to an embodiment of the invention.
  • the central axis 60a of the capacitor 60 is located below the central axis 10a of the current interrupter 10 and below the central axis 50a of the capacitor.
  • the corona ring 40 is arranged as above with respect to the central axis 60a of the resistor 60.
  • the distances d1 and d2 are indicated in Fig. 4 , whereas the corona ring supports have been omitted.
  • a three-phase high voltage live tank circuit breaker comprises three of the circuit breaker as disclosed above.

Claims (11)

  1. Ein Hochspannungs-Freiluftleistungsschalter, umfassend:
    - einen Unterstützungsisolator (20);
    - mindestens einen horizontal angeordneten länglichen Stromunterbrecher (10), der auf dem Unterstützungsisolator (20) angeordnet ist;
    - Anschlüsse (30), die mit den Enden des Stromunterbrechers verbunden sind; und
    - mindestens einen Koronaring (40), der ausgelegt ist, um mindestens teilweise einen der Anschlüsse zu umschließen;
    gekennzeichnet dadurch, dass
    der Koronaring (40) so ausgelegt ist, dass der vertikale Abstand (d1) zwischen der inneren Fläche des unteren Endes des Koronarings und einer Mittelachse (10a) des horizontal angeordneten länglichen Stromunterbrechers (10) zwischen etwa 1,5 und etwa 4 mal kürzer als der Abstand (d2) zwischen der inneren Fläche des oberen Endes des Koronarings und der Mittelachse ist.
  2. Hochspannungs-Freiluftleistungsschalter nach Anspruch 1, wobei der vertikale Abstand (d1) zwischen der inneren Fläche des unteren Endes des Koronarings und der Mittelachse (10a) zwischen etwa 2 und etwa 3 mal, bevorzugt etwa 7/3 mal, kürzer ist als der Abstand (d2) zwischen der inneren Fläche des oberen Endes des Koronarings und der Mittelachse.
  3. Ein Hochspannungs-Freiluftleistungsschalter, umfassend:
    - einen Unterstützungsisolator (20);
    - mindestens einen horizontal angeordneten länglichen Stromunterbrecher (10), der auf dem Unterstützungsisolator (20) angeordnet ist;
    - Anschlüsse (30), die mit den Enden des Stromunterbrechers verbunden sind;
    - einen horizontal angeordneten länglichen Kondensator (50) und/oder Widerstand (60), der zwischen den Anschlüssen parallel zu dem Stromunterbrecher (10) verbunden ist; und
    - mindestens einen Koronaring (50), der ausgelegt ist, um mindestens teilweise einen der Anschlüsse zu umschließen;
    gekennzeichnet dadurch, dass
    - der Koronaring (40) so ausgelegt ist, dass der vertikale Abstand (d1) zwischen der inneren Fläche des unteren Endes des Koronarings und einer Mittelachse (10a, 50a, 60a) des horizontal angeordneten länglichen Stromunterbrechers (10), des horizontal angeordneten länglichen Kondensators (50), oder des horizontal angeordneten länglichen Widerstands (60), je nachdem welcher am tiefsten angeordnet ist, zwischen etwa 1,5 mal und etwa 4 mal kleiner als der Abstand (d2) zwischen der inneren Fläche des oberen Endes des Koronarings und der Mittelachse ist.
  4. Hochspannungs-Freiluftleistungsschalter nach Anspruch 1, wobei der vertikale Abstand (d1) zwischen der inneren Fläche des unteren Endes des Koronarings und der Mittelachse (10a) zwischen etwa 2 und etwa 3 mal, und bevorzugt etwa 7/3 mal, kürzer als der Abstand (d2) zwischen der inneren Fläche des oberen Endes des Koronarings und der Mittelachse ist.
  5. Hochspannungs-Freiluftleistungsschalter nach irgendeinem der Ansprüche 1-4, wobei der Koronaring die Form eines Torus hat, und der vertikale Abstand (d1+d2) zwischen der inneren Fläche des unteren Endes des Koronarings und der inneren Fläche des oberen Endes des Koronarings der innere Durchmesser des Koronarings ist.
  6. Hochspannungs-Freiluftleistungsschalter nach irgendeinem der Ansprüche 1-4, wobei der Koronaring einen oberen, im wesentlichen horizontalen Abschnitt hat, und einen unteren, im wesentlichen horizontalen Abschnitt hat, und wobei der vertikale Abstand (d1+d2) zwischen der inneren Fläche des unteren Endes des Koronarings und der inneren Fläche des oberen Endes des Koronarings der Abstand zwischen diesen Abschnitten ist.
  7. Hochspannungs-Freiluftleistungsschalter nach irgendeinem der Ansprüche 1-6, wobei der Koronaring offene Enden hat.
  8. Hochspannungs-Freiluftleistungsschalter nach irgendeinem der Ansprüche 1-7, umfassend einen Koronaring, der ausgelegt ist, mindestens teilweise einen der Anschlüsse zu umschließen, wobei die Koronaringe konzentrisch zueinander angeordnet sind.
  9. Hochspannungs-Freiluftleistungsschalter nach irgendeinem der Ansprüche 1-8, umfassend einen Koronaring, der ausgelegt ist, mindestens teilweise einen anderen der Anschlüsse zu umschließen, wobei die Koronaringe konzentrisch zueinander angeordnet sind.
  10. Hochspannungs-Freiluftleistungsschalter nach irgendeinem der Ansprüche 1-7, umfassend einen horizontal angeordneten länglichen Stromunterbrecher (10) und Anschlüsse (30), die mit den Enden des Stromunterbrechers verbunden sind, wobei die Stromunterbrecher konzentrisch zueinander angeordnet sind und in Reihe verbunden sind, wobei derjenige Anschluss, der zumindest teilweise von dem Koronaring (40) umschlossen ist, ein äußerer Anschluss der in Reihe geschalteten Stromunterbrecher ist; weiter umfassend einen Koronaring (40), der dazu ausgelegt ist, zumindest teilweise den anderen äußeren Anschluss der in Reihe geschalteten Stromunterbrecher zu umschließen, wobei die Koronaringe konzentrisch zueinander angeordnet sind.
  11. Ein dreiphasiger Hochspannungs-Freiluftleistungsschalter, umfassend drei der Hochspannungs-Freiluftleistungsschalter nach einem der Ansprüche 1-10, einen für jede Phase.
EP08157339A 2008-05-30 2008-05-30 Hochspannungsschutzschalter Active EP2128882B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT08157339T ATE516592T1 (de) 2008-05-30 2008-05-30 Hochspannungsschutzschalter
ES08157339T ES2369343T3 (es) 2008-05-30 2008-05-30 Interruptor automático de alta tensión.
EP08157339A EP2128882B1 (de) 2008-05-30 2008-05-30 Hochspannungsschutzschalter
RU2009119057/07A RU2496174C2 (ru) 2008-05-30 2009-05-21 Высоковольтный выключатель с дугогасящей камерой (варианты)
CN200910159501.3A CN101604595B (zh) 2008-05-30 2009-05-27 高压断路器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08157339A EP2128882B1 (de) 2008-05-30 2008-05-30 Hochspannungsschutzschalter

Publications (2)

Publication Number Publication Date
EP2128882A1 EP2128882A1 (de) 2009-12-02
EP2128882B1 true EP2128882B1 (de) 2011-07-13

Family

ID=39864922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08157339A Active EP2128882B1 (de) 2008-05-30 2008-05-30 Hochspannungsschutzschalter

Country Status (5)

Country Link
EP (1) EP2128882B1 (de)
CN (1) CN101604595B (de)
AT (1) ATE516592T1 (de)
ES (1) ES2369343T3 (de)
RU (1) RU2496174C2 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1351535A (fr) * 1962-12-22 1964-02-07 Merlin Gerin Disjoncteur à gaz comprimé
DE2708660C3 (de) * 1977-02-28 1980-09-18 Franz Wirschitz Gmbh Herstellung Von Freileitungs- Und Schaltanlagenarmaturen, 8000 Muenchen Lichtbogenschutzarmatur für Isolatoren von elektrischen Hochspannungsfreileitungen
DE8007102U1 (de) * 1980-03-13 1981-03-26 Siemens AG, 1000 Berlin und 8000 München Freiluft-Hochspannungs-Leistungsschalter
FR2707793B1 (fr) * 1993-07-13 1995-08-25 Gec Alsthom T & D Sa Pôle de disjoncteur à deux chambres de coupure en T ou en V.
CN2442378Y (zh) * 2000-09-22 2001-08-08 河南平高电气股份有限公司 一种超高压隔离开关
DE10221580B3 (de) * 2002-05-08 2004-01-22 Siemens Ag Unterbrechereinheit eines Hochspannungs-Leistungsschalters
RU2323499C1 (ru) * 2006-11-27 2008-04-27 Открытое акционерное общество "Научно-исследовательский и проектно-конструкторский институт высоковольтного аппаратостроения" (ОАО "НИИВА") Дугогасительное устройство компактного высоковольтного газонаполненного выключателя
CN201048104Y (zh) * 2007-03-07 2008-04-16 湖南长高高压开关集团股份公司 1100kV特高压接地开关

Also Published As

Publication number Publication date
RU2496174C2 (ru) 2013-10-20
CN101604595B (zh) 2013-11-06
RU2009119057A (ru) 2010-11-27
ES2369343T3 (es) 2011-11-29
EP2128882A1 (de) 2009-12-02
ATE516592T1 (de) 2011-07-15
CN101604595A (zh) 2009-12-16

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