DE3422253A1 - High-voltage power circuit breaker for switching short-circuits which are close to the generator - Google Patents

High-voltage power circuit breaker for switching short-circuits which are close to the generator

Info

Publication number
DE3422253A1
DE3422253A1 DE19843422253 DE3422253A DE3422253A1 DE 3422253 A1 DE3422253 A1 DE 3422253A1 DE 19843422253 DE19843422253 DE 19843422253 DE 3422253 A DE3422253 A DE 3422253A DE 3422253 A1 DE3422253 A1 DE 3422253A1
Authority
DE
Germany
Prior art keywords
generator
switching
close
circuits
circuit breaker
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.)
Granted
Application number
DE19843422253
Other languages
German (de)
Other versions
DE3422253C2 (en
Inventor
Karl-Heinrich Dipl.-Ing. 3501 Niestetal Hinterthür
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19843422253 priority Critical patent/DE3422253A1/en
Publication of DE3422253A1 publication Critical patent/DE3422253A1/en
Application granted granted Critical
Publication of DE3422253C2 publication Critical patent/DE3422253C2/de
Granted legal-status Critical Current

Links

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
    • H01H33/006—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means adapted for interrupting fault currents with delayed zero crossings

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The application relates to a high-voltage power circuit breaker having arc voltages of such a magnitude that, in the case of currents having suppressed zero-crossovers which can occur in the case of short-circuits which are close to the generator, a premature current zero-crossover is forced. In order to operate such circuit breakers for correct switching on and off in the case of short-circuits close to the generator as well; of n switching paths, n-m switching paths are switched on in a delayed manner, while during switching off, in contrast, all n switching paths are switched simultaneously.

Description

Hochspannungs-Leistungsschalter zum Schalten generatornaherHigh-voltage circuit breaker for switching closer to the generator

Kurzschlüsse" Die Erfindung befasst sich mit einem Hochspannungs-Leistungsschalter gemaß dem Oberbegriff des Patentanspruches. Short circuits "The invention is concerned with a high-voltage circuit breaker according to the preamble of the claim.

Bei generatornahen Kurzschlüssen kann das Problem ausbleibender Nulldurchgänge entstehen. Dieses Problem tritt dann auf, wenn der Generator untererregt ist und zunächst ein zweiphasiger Kurzschluß im Spannungsnulldurchgang auftritt, der nach einer Viertelperiode in einen dreipoligen Kurzschluß übergeht.In the case of short circuits close to the generator, the problem of missing zero crossings can arise develop. This problem occurs when the generator is underexcited and initially a two-phase short-circuit occurs in the voltage zero crossing, which after a quarter cycle turns into a three-pole short circuit.

Leistungsschalter können einen Strom-Null durchgang durch eine hinreichend große Lichtbogenspannung vorzeitig erzwingen.Circuit breakers can have a current zero passage through a sufficient Force large arc voltage prematurely.

SF6-Schalter mit vergleichsweise kleinen Lichtbogenspannungen erfordern eine größere Zahl von Schaltstrecken als Druckluftschalter. Eine größere Zahl von SFg-Schaltstrecken - beispielsweise 4 Schaltstrecken bei 420 KV-kann dazu führen, daß die Einleitung des Kurzschlusses im Spannungs-Nulldurchgang überhaupt erst möglich wird. Würde man die Zahl der Schaltstrecken herabsetzen, würde der Kurzschluß nicht im Spannungs-Null- durchgang wegen des dann unvermeidlichen Vorüberschlags auftreten. Die Anfangsbedingungen würden zwar erleichtert, die geringere Lichtbogenspannung genügt aber nicht, einen Strom-Nulldurchgang zu erzwingen.Require SF6 switches with comparatively low arc voltages a larger number of switching paths than compressed air switches. A larger number of SFg switching paths - for example 4 switching paths at 420 KV - can lead to that the initiation of the short circuit in the voltage zero crossing is possible in the first place will. If you were to reduce the number of switching paths, the short circuit would not in voltage zero passage because of the inevitable flashover appear. The initial conditions would be easier, the lower arc voltage however, it is not sufficient to force a current zero crossing.

Aufgabe der Erfindung ist es daher, einen Hochspannungs-Leistungsschalter zu schaffen, mit dem die Ein- und Ausschaltung generatornaher Kurzschlüsse gewährleistet wird.The object of the invention is therefore to provide a high-voltage circuit breaker to ensure that short circuits close to the generator are switched on and off will.

Diese Aufgabe wird durch die im Kennzeichen des Hauptanspruchs angegebenen Merkmale gelöst.This task is given by the characterizing part of the main claim Features solved.

Der Schalter nach der Erfindung hat den Vorteil, daß beispielsweise von vier Schaltstrecken zwei Schaltstrecken verzögert eingeschaltet werden, so daß die beiden zuletzt einschaltenden Schaltstrecken immer mit einem Vorüberschlag, also nicht im Spannungs-Nulldurchgang, einschalten, daß dagegen bei einer Ausschaltung alle vier Schaltstrecken gleichzeitig ausschalten und ihre Lichtbogenspannung in den Stromkreis einbringen.The switch according to the invention has the advantage that, for example of four switching paths two switching paths are switched on with a delay, so that the last two switching sections to be switched on always with a flashover, So do not switch on in the voltage zero crossing, but that on the other hand when it is switched off switch off all four switching paths at the same time and set their arc voltage in bring in the circuit.

Claims (1)

PATENTANSPRUCH Hochspannungs-Leistungsschalter mit Lichtbogenspannungen von einer solchen Größe, daß bei Strömen mit unterdrückten Nulldurchgängen, die bei generatornahen Kurzschlüssen auftreten können, ein vorzeitiger Strom-Nulldurchgang erzwungen wird, dadurch gekennzeichnet, daß von n Schaltstrecken des Schalters n - m verzögert einschalten, bei einer Ausschaltu-ng dagegen alle n Schaltstrecken gleichzeitig schalten.PATENT CLAIM High-voltage circuit breaker with arc voltages of such a size that for currents with suppressed zero crossings, the in the case of short circuits close to the generator, a premature current zero crossing can occur is forced, characterized in that of n switching paths of the switch n - Switch on m with a delay, in the case of switch-off, on the other hand, all n switching paths switch at the same time.
DE19843422253 1984-06-15 1984-06-15 High-voltage power circuit breaker for switching short-circuits which are close to the generator Granted DE3422253A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19843422253 DE3422253A1 (en) 1984-06-15 1984-06-15 High-voltage power circuit breaker for switching short-circuits which are close to the generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843422253 DE3422253A1 (en) 1984-06-15 1984-06-15 High-voltage power circuit breaker for switching short-circuits which are close to the generator

Publications (2)

Publication Number Publication Date
DE3422253A1 true DE3422253A1 (en) 1985-12-19
DE3422253C2 DE3422253C2 (en) 1989-08-17

Family

ID=6238436

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843422253 Granted DE3422253A1 (en) 1984-06-15 1984-06-15 High-voltage power circuit breaker for switching short-circuits which are close to the generator

Country Status (1)

Country Link
DE (1) DE3422253A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1227736B (en) * 1959-09-04 1966-10-27 Alan Dewhurst Outer shoe brake that can be released electromagnetically against the force of a brake pressure spring
DE1902211A1 (en) * 1969-01-17 1970-07-30 Licentia Gmbh Extra high voltage circuit breakers with switch-on resistors
DE3038561A1 (en) * 1980-10-13 1982-05-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt HV switch for large transformers - has series switch paths bridged by parallel resistor and by resistor and series secondary switch path

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1227736B (en) * 1959-09-04 1966-10-27 Alan Dewhurst Outer shoe brake that can be released electromagnetically against the force of a brake pressure spring
DE1902211A1 (en) * 1969-01-17 1970-07-30 Licentia Gmbh Extra high voltage circuit breakers with switch-on resistors
DE3038561A1 (en) * 1980-10-13 1982-05-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt HV switch for large transformers - has series switch paths bridged by parallel resistor and by resistor and series secondary switch path

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Z.: Elektrizitätswirtschaft, Jg. 77, 1978, H. 11, S. 385-393 *

Also Published As

Publication number Publication date
DE3422253C2 (en) 1989-08-17

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee