EP1974362B1 - Generator-isolator mit integriertem widerstand - Google Patents

Generator-isolator mit integriertem widerstand Download PDF

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Publication number
EP1974362B1
EP1974362B1 EP07703847A EP07703847A EP1974362B1 EP 1974362 B1 EP1974362 B1 EP 1974362B1 EP 07703847 A EP07703847 A EP 07703847A EP 07703847 A EP07703847 A EP 07703847A EP 1974362 B1 EP1974362 B1 EP 1974362B1
Authority
EP
European Patent Office
Prior art keywords
switch
circuit
contacts
breaker
current
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.)
Revoked
Application number
EP07703847A
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English (en)
French (fr)
Other versions
EP1974362A1 (de
Inventor
Jean-Marc Willieme
François Biquez
Denis Frigiere
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.)
General Electric Technology GmbH
Original Assignee
Alstom Grid SAS
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
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Application filed by Alstom Grid SAS filed Critical Alstom Grid SAS
Publication of EP1974362A1 publication Critical patent/EP1974362A1/de
Application granted granted Critical
Publication of EP1974362B1 publication Critical patent/EP1974362B1/de
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H33/60—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
    • 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

Definitions

  • the invention relates to the field of electrical equipment equipping the energy evacuation devices of generators in power generation plants.
  • the invention relates to increasing the performance by interrupting the short-circuit current by inserting a resistor.
  • the invention relates to a generator circuit breaker comprising a first main circuit interrupter connected in parallel with a second auxiliary breaking switch associated with a fixed value resistor.
  • a safety option is to have a circuit breaker to isolate the circuit before the transformer connected to a power line.
  • This type of switchgear under a voltage of the order of 15 kV to 36 kV, then performs the functions of passing strong permanent current (of the order of several thousand amperes) and breaking high fault current. (of the order of tens of thousands of amperes), while isolating the circuit.
  • the cut is performed in two stages by two switches in parallel, one permitting the passage of permanent nominal current and the other ensuring the breaking of the current of short circuit.
  • alternator breaking devices thus suffer from power constraints that do not allow the same designs to be applied to the arrangement. and the actuation of the different elements.
  • the main circuit switch contacts for these generator circuit breakers are large enough to withstand high nominal currents without overheating, and they define a relatively large volume.
  • the cut-off switch conventionally comprises a bulb of reduced dimensions, disposed inside this volume and comprising movable arcing contacts relative to each other, which in fact only support the breaking current of the breaker.
  • the contacts of the two switches extend in the same longitudinal direction and are displaced in translation parallel to this direction; the main contacts first deviate and travel a sufficient distance before the current is switched on the arcing contacts, which then open and cause the interruption of the current.
  • the currents flowing in the generator circuit breakers can be of such intensity that the sizing of the switches becomes problematic.
  • the short-circuit currents can reach several hundred kiloamperes, which considerably increases the cost of the associated breaking chamber.
  • the object of the invention is to overcome the above disadvantages by providing generator circuit breakers in which the performance of the short-circuit current is increased, for which it is not necessary to develop a special breaking chamber that is compatible with such intense currents.
  • This objective is achieved by inserting a resistor using an auxiliary switch, the resistance value being much greater than that of the switch but limited to obtain a reduction in the voltage recovery rate after cutoff.
  • the invention relates in one aspect to a generator circuit breaker comprising a main switch, which may in particular be composed of a circuit breaker, in parallel with an auxiliary circuit cutoff, comprising for example a light bulb empty, each being associated with control means.
  • the circuit breaker further comprises synchronization means, preferably associated with the control means, allowing, during a break, to separate successively and in this order the contacts of the first main switch, then the second auxiliary switch.
  • the same control means comprise these synchronization means and allow, by a single command, the successive implementation of each of the elements.
  • the circuit breaker according to the invention comprises a resistor of fixed ohmic value inserted on the auxiliary circuit, placed in series with the second switch.
  • the value of the resistance is superior of an order 10,000 or even ten million, the resistance of the first main switch, between 0.1 to 40 ⁇ , and preferably between 0.1 and 10 ⁇ .
  • synchronization means make it possible, during closure, to contact the contacts of the first switch before contacting the contacts of the second switch.
  • a second cut-off switch 2 is connected in parallel with the first switch 1 in order to perform the function of breaking the short-circuit current I sc , the opening of the first switch 1 actually switching the current of the nominal circuit 5 on this cutoff circuit 7; the contacts of this second switch 2, for example tungsten, are of limited performance with respect to the passage of the rated current I, but have a high breaking capacity.
  • circuit breakers One way to reduce the development costs of such circuit breakers is to associate with a known device elements to facilitate the cutting of intense short circuit currents.
  • the document EP 1 117 114 proposes for example to insert an arc generating device to facilitate the action of the second cutoff switch, which however increases the circuit breaker, both in terms of size and economy.
  • FIG. 1B a different principle of cutting, illustrated in Figure 1B , was then considered preferable: two switches 10, 20 are connected in parallel on a main circuit 5 and an auxiliary circuit 7, each of the switches comprising at least one pair of movable contacts relative to each other.
  • the opening of the main switch 10 allows the actual breaking of the current I sc in conditions made favorable by the presence of a resistor placed at its terminals, the auxiliary switch 20 for a final cut.
  • a resistance 30 of determined value R is placed on the auxiliary circuit 7, in series with the switch 20.
  • the rate of increase of the recovery voltage (VATR) across the switch 10 is reduced. It is significantly reduced with a value between 0.1 and 10 ohms. Indeed, in the absence of the resistance insertion circuit 7, the opening of the switch 10 and the interruption of the current give rise to a very high VATR indicated by the standards, for example 4 to 6 kV / ⁇ s .
  • the presence of the additional resistor 30 makes it possible to significantly reduce the VATR, typically from 0.01 kV / ⁇ s to 1 kV / ⁇ s, and thus facilitates the interruption of the current by delaying the increase of the voltage across the terminals.
  • the cut-off function can be accomplished at a lower cost initially by the switch 10 of the main circuit 5.
  • the opening of the second auxiliary switch 20 is caused, preferably by the same control means, in order to ensure the definitive breaking of the current.
  • the resistive current I r established in the auxiliary branch 7 of the circuit is much smaller than the current I 0 flowing in the main circuit 5, which is almost identical to the nominal current I or to the short-circuit current I sc .
  • the switch cutoff 20 may be sized appropriately, and especially for a lower intensity, for a reduced current I r much less than I sc .
  • the auxiliary switch 20 may be a gas-off chamber, but, in particular, it becomes possible thanks to the invention to use a vacuum interrupter 20 '(shown schematically in FIG. figure 1C ) although the intensity of the short-circuit current a priori suggests a dimensioning too expensive or impossible for this type of interruption device for a conventional circuit breaker.
  • the insertion of the resistor 30 allows a much easier dimensioning of the main breaking chamber 10.
  • the adjustment of the value R of the resistor 30 makes it possible to optimize the torque of the main chamber 10 / auxiliary chamber 20: if R decreases, the first switch 10 is less stressed and the second 20 is more, and vice versa.
  • the main switch 10 can also be a SF 6 gas-type switching chamber.
  • the first switch 10 'itself consists of a circuit breaker comprising two switches 12, 14 in parallel on two branches 2 , 5 4 of the main circuit 5.
  • a practical embodiment is for example illustrated, only as an indication and schematic, in figure 2 , in which the upper part represents the closed circuit breaker 40, and the lower part the current passing through the bus bars 42, 44 cut.
  • the circuit breaker 40 is advantageously secured to the ground 46 in a fixed manner between a central alternator coupled to the first busbar 42 and a high-voltage transformer coupled to the second busbar 44.
  • the synchronization means 50 may for example comprise a sliding rod, at its end, in an inclined slot allowing the delay in opening.
  • the configuration shown, in which the vacuum bulb 20 'is above the pole of the circuit breaker 40, can naturally be replaced by an auxiliary switch 20 located on a horizontal plane at the axis AA of the first switch 10, or any other plane by rotating the bulb around this axis AA.
  • the resistors 30 can be anywhere in the circuit breaker 40 where space is available.
  • the circuit breaker according to the invention may further comprise a third switch 60 in series with the second switch 20, for purposes of section and not of cut-off, in order to avoid a drop in dielectric strength of the second switch 20 which could accidentally allow the current flow in the branch 7 associated.

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Control Of Eletrric Generators (AREA)
  • Control Of Electrical Variables (AREA)
  • Emergency Protection Circuit Devices (AREA)

Claims (6)

  1. Generator-Leistungsschalter (40), enthaltend:
    - einen ersten Hauptschalter (10) mit einem ersten Paar von Kontaktstücken, die entlang einer ersten Achse (AA) translatorisch zueinander verschiebbar sind;
    - einen zweiten Kurzschluss-Hilfsschalter (20) mit einem zweiten Paar von Kontaktstücken, die zueinander beweglich sind und mit dem ersten Schalter (10) parallel geschaltet sind, wobei der zweite Schalter einem Widerstand (30) mit festem Wert (R) in Reihe zugeordnet ist;
    - Synchronisationsmittel (50), die bei einer Abschaltung die Trennung der Kontaktstücke des ersten Schalters (10) vor der Trennung der Kontaktstücke des zweiten Schalters (20) gestatten;
    dadurch gekennzeichnet, dass der Widerstand des ersten Schalters (10) in der Größenordnung von 10-6 bis 10-4 Ω liegt und der zugeordnete Widerstand in der Größenordnung von 0,1 bis 40 Ω liegt.
  2. Generator-Leistungsschalter nach Anspruch 1, wobei der zugeordnete Widerstand in der Größenordnung von 0,1 bis 10 Ω liegt.
  3. Generator-Leistungsschalter nach Anspruch 1 oder 2, wobei Synchronisationsmittel bei einem Einschalten gestatten, die Kontaktstücke des ersten Schalters (10) in Kontakt zu bringen, bevor die Kontaktstücke des zweiten Schalters (20) in Kontakt gebracht werden.
  4. Generator-Leistungsschalter nach einem der vorangehenden Ansprüche, wobei der zweite Schalter (20') eine Vakuumröhre ist.
  5. Leistungsschalter nach einem der Ansprüche 1 bis 4, ferner enthaltend einen dritten Schalter (60) in Reihe mit dem zweiten Schalter (20), wobei die Synchronisationsmittel (50) dazu ausgelegt sind, das Paar von Kontaktstücken des zweiten Schalters (20) vor dem Paar von Kontaktstücken des dritten Schalters (60) zu trennen.
  6. Leistungsschalter nach einem der Ansprüche 1 bis 4, wobei der erste Schalter (10') ein Leistungsschalter mit zwei parallel geschalteten Schaltern (12, 14) ist.
EP07703847A 2006-01-17 2007-01-15 Generator-isolator mit integriertem widerstand Revoked EP1974362B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0650155A FR2896335B1 (fr) 2006-01-17 2006-01-17 Disjoncteur de generateur avec resistance inseree
PCT/EP2007/050329 WO2007082858A1 (fr) 2006-01-17 2007-01-15 Disjoncteur de générateur avec résistance insérée

Publications (2)

Publication Number Publication Date
EP1974362A1 EP1974362A1 (de) 2008-10-01
EP1974362B1 true EP1974362B1 (de) 2012-05-02

Family

ID=37076360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07703847A Revoked EP1974362B1 (de) 2006-01-17 2007-01-15 Generator-isolator mit integriertem widerstand

Country Status (6)

Country Link
US (1) US8264803B2 (de)
EP (1) EP1974362B1 (de)
CN (1) CN101375357B (de)
AT (1) ATE556421T1 (de)
FR (1) FR2896335B1 (de)
WO (1) WO2007082858A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005015366A2 (en) 2003-08-08 2005-02-17 Electric Power Group, Llc Real-time performance monitoring and management system
JP5166204B2 (ja) * 2008-10-24 2013-03-21 株式会社東芝 ガス絶縁遮断器システムおよびガス絶縁遮断器監視方法
EP2189998A1 (de) * 2008-11-24 2010-05-26 ABB Technology AG Generatorschalteranordnung
FR2946792A1 (fr) * 2009-06-10 2010-12-17 Areva T & D Sa Enroulement pour contact d'ampoule a vide a moyenne tension a endurance amelioree, ampoule a vide et disjoncteur, tel qu'un disjoncteur sectionneur d'alternateur associes.
FR2946790B1 (fr) * 2009-06-10 2011-07-01 Areva T & D Sa Contact pour ampoule a vide a moyenne tension a coupure d'arc amelioree, ampoule a vide et disjoncteur, tel qu'un disjoncteur sectionneur d'alternateur associes.
FR2946791B1 (fr) * 2009-06-10 2011-09-23 Areva T & D Sa Contact pour ampoule a vide a moyenne tension a structure renforcee, ampoule a vide et disjoncteur, tel qu'un disjoncteur sectionneur d'alternateur associes.
FR2985081B1 (fr) 2011-12-21 2015-03-06 Alstom Technology Ltd Dispositif de protection contre les particules engendrees par un arc electrique de commutation
FR2996352B1 (fr) 2012-10-02 2014-10-31 Alstom Technology Ltd Dispositif de contact electrique de type doigt de contact a fort courant nominal
US9054530B2 (en) 2013-04-25 2015-06-09 General Atomics Pulsed interrupter and method of operation
DE102013225112B4 (de) * 2013-12-06 2021-06-02 Siemens Aktiengesellschaft Elektrisches Schaltgerät

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH425949A (de) * 1965-09-06 1966-12-15 Bbc Brown Boveri & Cie Druckgasschalter mit Mehrfachunterbrechung
US3590186A (en) * 1968-12-19 1971-06-29 Allis Chalmers Mfg Co Vacuum interrupter having series connected resistor and shunting means for the latter
US3970809A (en) * 1975-02-10 1976-07-20 General Electric Company Electric circuit breaker comprising parallel-connected vacuum interrupters
JPS56152125A (en) * 1980-04-25 1981-11-25 Tokyo Shibaura Electric Co Breaker
JPS6155829A (ja) * 1984-08-28 1986-03-20 株式会社東芝 しや断器
JPH01298617A (ja) * 1988-05-27 1989-12-01 Toshiba Corp 真空バルブ用接点とその製造方法
JPH0719504B2 (ja) * 1988-11-08 1995-03-06 三菱電機株式会社 断路器
JP3799924B2 (ja) 2000-01-11 2006-07-19 株式会社日立製作所 電力用遮断器および発電所電気回路装置

Also Published As

Publication number Publication date
EP1974362A1 (de) 2008-10-01
FR2896335B1 (fr) 2008-11-14
WO2007082858A1 (fr) 2007-07-26
FR2896335A1 (fr) 2007-07-20
ATE556421T1 (de) 2012-05-15
CN101375357A (zh) 2009-02-25
US8264803B2 (en) 2012-09-11
US20100220418A1 (en) 2010-09-02
CN101375357B (zh) 2012-04-04

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