EP2189998A1 - Agencement de commutation de générateur - Google Patents

Agencement de commutation de générateur Download PDF

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Publication number
EP2189998A1
EP2189998A1 EP08169795A EP08169795A EP2189998A1 EP 2189998 A1 EP2189998 A1 EP 2189998A1 EP 08169795 A EP08169795 A EP 08169795A EP 08169795 A EP08169795 A EP 08169795A EP 2189998 A1 EP2189998 A1 EP 2189998A1
Authority
EP
European Patent Office
Prior art keywords
switch
generator
main
arrangement according
switch arrangement
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.)
Withdrawn
Application number
EP08169795A
Other languages
German (de)
English (en)
Inventor
Lukas Zehnder
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.)
ABB Technology AG
Original Assignee
ABB Technology AG
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
Application filed by ABB Technology AG filed Critical ABB Technology AG
Priority to EP08169795A priority Critical patent/EP2189998A1/fr
Publication of EP2189998A1 publication Critical patent/EP2189998A1/fr
Withdrawn legal-status Critical Current

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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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • H01H33/168—Impedances connected with contacts the impedance being inserted both while closing and while opening the switch
    • 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
    • H01H33/002—Very heavy-current switches
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H33/6661—Combination with other type of switch, e.g. for load break switches

Definitions

  • the invention relates to a generator switch arrangement according to the preamble of claim 1. Such arrangements are used in power plants for producing a separable connection of generators to the electrical network.
  • Commonly known generator switch assemblies include a single SF 6 switch. Such arrangements can switch as short-circuit currents up to about 210kA at rated voltages up to about 30kV. Increasingly, however, higher switching capacities are required, in particular for switching off even higher short-circuit currents, which can not be achieved with such generator switch arrangements.
  • a generator switch arrangement with a secondary current path in which approximately a semiconductor switch made up of turn-off thyristors and a PTC resistor are connected in series is out of order EP 1 014 403 A1 known.
  • EP 1 098 332 A2 shows a similar arrangement. Because of the limited switching power of the semiconductor switches, however, only short-circuit currents of a few tens of kA can be handled with such generator switch arrangements.
  • the invention is based on the object to provide a generic generator switch arrangement, with the very high short-circuit currents, preferably of more than 210kA, can be handled at rated voltages of up to 36kV.
  • the generator switch assembly has a main current path 1, in which a main switch 2 is located and a secondary current path 3, in which in series a generator side arranged damping resistor 4 and a sub-switch 5 are.
  • a main current path 1 in which a main switch 2 is located
  • a secondary current path 3 in which in series a generator side arranged damping resistor 4 and a sub-switch 5 are.
  • the main switch 2 is designed as a closed SF 6 switch, ie as a SF 6 switch with a closed gas volume with a rated current contact arrangement and a burn-off contact arrangement parallel thereto. It may be a switch of the type HEC 7, HEC 8 or HECS ABB. These switches can break short-circuit currents of 140-160kA at a rated voltage of up to 30kV or 161-190kA at 27.5kV and 191-210kA at 25.2kV. The rated current at 50Hz mains frequency is 24kA, 28kA or 18kA. The switches come with pressures of about 6 bar and therefore require no large drives and no compressors.
  • the sub-switch 5 need not have a rated current contact arrangement. It can be about a vacuum switch, eg VE1 of the ABB, the short-circuit currents of up to 31.5kA can switch off at a rated voltage of 36kV. It is also possible to use another encapsulated SF 6 switch, eg ABB's HD4, which can handle short-circuit currents of up to 50kA with a nominal voltage of up to 40.5kV. The rated current contact arrangement provided with this switch can be omitted. Again, the eligible switch only low requirements in terms of drive and maintenance. In general, sub-switches are switches with rated voltages between 20kV and 42kV and rated currents between 2.5kA and 3.6kA, capable of handling maximum short-circuit currents between 30kA and 50kA.
  • the damping resistor 4 must be able to absorb a relatively high power.
  • it is formed as a wire resistor, which consists of a plurality of parallel resistance wires of a refractory material. Its resistance value can be between 0.1 ⁇ and 10 ⁇ . It is preferably between 1 ⁇ and 5 ⁇ .
  • the main switch 2 In a shutdown, especially in the event of a short circuit, the main switch 2 is first opened, wherein the current commutes when opening the rated current contact arrangement on the Abbrandpfad with the Abbrandcardan ever. In the separation of the Abbrand tokene an arc is drawn between them, which increases the voltage drop in the main current path 1 and causes a predominant commutation of the Maustrom path 3, which has a reduction of the current in the main current path 1 result, which deletes the arc in the main current path 1 between allowed the burn-off contacts at the next current zero crossing. After extinguishing the arc in the main current path, the current is thus completely commutated to the secondary current path 3.
  • the contact arrangement of the sub-switch 5 is opened.
  • the damping resistor 4 limited after the extinguishment of the arc in the main switch 2 under high power consumption, the short-circuit current, so that the same can be safely switched off by the relatively small sub-switch 5.
  • short-circuit currents up to 250kA can be switched off at nominal voltages up to about 36 kV with the described generator switch arrangement, whereby even the highest current requirements are met.

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  • Control Of Eletrric Generators (AREA)
EP08169795A 2008-11-24 2008-11-24 Agencement de commutation de générateur Withdrawn EP2189998A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08169795A EP2189998A1 (fr) 2008-11-24 2008-11-24 Agencement de commutation de générateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08169795A EP2189998A1 (fr) 2008-11-24 2008-11-24 Agencement de commutation de générateur

Publications (1)

Publication Number Publication Date
EP2189998A1 true EP2189998A1 (fr) 2010-05-26

Family

ID=40139422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08169795A Withdrawn EP2189998A1 (fr) 2008-11-24 2008-11-24 Agencement de commutation de générateur

Country Status (1)

Country Link
EP (1) EP2189998A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514872A1 (fr) * 1991-05-23 1992-11-25 Hitachi, Ltd. Disjoncteur avec une résistance en parallèle
EP1014403A1 (fr) 1998-12-21 2000-06-28 Asea Brown Boveri AG Interrupteur limiteur de courant
EP1098332A2 (fr) 1999-11-08 2001-05-09 ABB Hochspannungstechnik AG Interrupteur limiteur de courant rapide
FR2896335A1 (fr) * 2006-01-17 2007-07-20 Areva T & D Sa Disjoncteur de generateur avec resistance inseree

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514872A1 (fr) * 1991-05-23 1992-11-25 Hitachi, Ltd. Disjoncteur avec une résistance en parallèle
EP1014403A1 (fr) 1998-12-21 2000-06-28 Asea Brown Boveri AG Interrupteur limiteur de courant
EP1098332A2 (fr) 1999-11-08 2001-05-09 ABB Hochspannungstechnik AG Interrupteur limiteur de courant rapide
FR2896335A1 (fr) * 2006-01-17 2007-07-20 Areva T & D Sa Disjoncteur de generateur avec resistance inseree

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