DE604937C - Device for the rapid de-excitation of synchronous generators - Google Patents

Device for the rapid de-excitation of synchronous generators

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Publication number
DE604937C
DE604937C DE1930604937D DE604937DD DE604937C DE 604937 C DE604937 C DE 604937C DE 1930604937 D DE1930604937 D DE 1930604937D DE 604937D D DE604937D D DE 604937DD DE 604937 C DE604937 C DE 604937C
Authority
DE
Germany
Prior art keywords
excitation
circuit
rapid
auxiliary
winding
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.)
Expired
Application number
DE1930604937D
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German (de)
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BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri France SA
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 BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
Application granted granted Critical
Publication of DE604937C publication Critical patent/DE604937C/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/10Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
    • H02P9/12Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for demagnetising; for reducing effects of remanence; for preventing pole reversal
    • H02P9/123Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for demagnetising; for reducing effects of remanence; for preventing pole reversal for demagnetising; for reducing effects of remanence

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Description

Einrichtung zur Schnellentregung von Synchrongeneratoren Bei Defekten im Innern von Synchrongeneratoren können starke Beschädigungen dadurch auftreten, daß die im Generator induzierte EMK nicht genügend rasch zum Verschwinden gebracht wird. Es. sind bereits verschiedene Methoden angegeben worden, um eine Beschleunigung der Entregung herbeizuführen. Es ist z. B. angegeben worden, daß in den Haupterregerkreis im Augenblick der Störung ein Widerstand eingeschaltet wird, welcher eine rasche. Abnahme des Erregerstromes bewirkt. Es sind auch Verfahren bekanntgeworden, welche die Umpolung der Erregermaschine bewirken, die dann motorisch wirkt und die magnetische Energie der Feldwicklung entzieht.Device for quick de-excitation of synchronous generators in the event of defects Severe damage can occur inside synchronous generators as a result that the EMF induced in the generator is not made to disappear quickly enough will. It. Various methods have already been given to achieve an acceleration to bring about de-excitation. It is Z. B. has been stated that in the main excitation circuit at the moment of the disturbance a resistance is switched on, which a rapid. Causes a decrease in the excitation current. There are also methods known which cause the polarity reversal of the exciter, which then acts as a motor and the magnetic Removes energy from the field winding.

Es ist ferner eine Vorrichtung zum. Schnellentregen von Synchronmotoren bekannt, bei der in. Reihe mit der Erregerwicklung einer Gleichstrommaschine der Ankereiner kleinen Zusatzgleichstrommaschine geschaltet ist, die abhängig vom Strom der Hauptmaschine erregt wird unter Verwendung eines Transformators, der primär im Ankerstromkreis liegt. Weiter ist es bekannt'= zur Verkleinerung des normalen Kurzschlußstromes von Drehstromgeneratoren über die im Haupterregerkreis des Drehstromgenerators liegende Primärwicklung eines Reihenschlußtransformators in der in den Erregerkreis der Erregermaschine eingeschalteten Sekundärwicklung eine Spannung zu induzieren, die den Fluß der Erregermaschine im entgegengesetzten Sinn der Flußänderungen des Transformators beeinflußt. Ferner hat man in den Ha@upterregerkreis des Generators emne Compoundwicklung der Erregermaschine geschaltet, die normalerweise kurzgeschlossen ist und die der Nebenschlußerregerwi:cklung des Generators entgegenwirkt. Insbesondere bei den @erstgenannten Einrichtungen kann lediglich der plötzliche Anstieg des Erregerstromes beim -Eintritt eines Kurzschlusses zur Entregung `benutzt und dahernur der Stoßkurzschlußstrom beeinflußt werden.It is also a device for. Rapid de-energizing of synchronous motors known in the series with the excitation winding of a DC machine A small additional DC machine is connected, which depends on the current the main engine is energized using a transformer that is primary lies in the armature circuit. It is also known '= to reduce the normal Short-circuit current from three-phase generators via the one in the main excitation circuit of the three-phase generator lying primary winding of a series transformer in the in the excitation circuit the secondary winding switched on to induce a voltage, the flow of the exciter in the opposite sense of the flow changes of the Transformer affects. Furthermore, one has in the main exciter circuit of the generator A compound winding of the exciter is switched, which is normally short-circuited and which counteracts the generator's shunt excitation. In particular in the case of the first-mentioned devices, only the sudden increase in the excitation current When a short circuit occurs, it is used for de-excitation and therefore only the surge short-circuit current to be influenced.

Die Erfindung bezieht sich nun auf Einrichtungen zur Schnellentregung von Synchrongeneratoren, bei denen ,auf die Erregermaschine des Synchrongenerators eine mit dem Erregerkreis dieses Generators rein induktiv gekoppelte Hilfserregerwicklung während der Entregung in -feldschwächendem Sinne ,einwirkt.The invention now relates to devices for rapid de-energization of synchronous generators, where, on the exciter of the synchronous generator an auxiliary excitation winding that is purely inductively coupled to the excitation circuit of this generator acts during the de-excitation in a field-weakening sense.

Das Merkmal der Erfindung besteht darin, daß in dem Erregerkreis des Synchrongenerators ein Widerstand vorgesehen ist, der betriebsmäßig überbrückt -und zu Beginn der Entregung eingeschaltet wird.The feature of the invention is that in the excitation circuit of the Synchronous generator, a resistor is provided, which bridges and operationally is switched on at the beginning of de-excitation.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt. ist der zu erstregende Generator mit der Erregerwicklung b und der Erregermaschine c. Die Erregermaschine besitzt eine Hilfserregerwicklung d, die über dien Transformator e mit dem Haupterregerkreis induktiv gekoppelt ist. Im Haupterregerkreis liegt ferner der Widerstand f, der normalerweise durch den Schalterg überbrückt ist. Die Betätigungsspule des Schalters g wird bei Auftreten einer Störung im Generator .erregt, so daß dieüberbrückung des Widerstandes/ aufgehoben wird. Infolgedessen tritt nahezu gleichzeitig mit der Störung eine plötzliche Stromabnahme im Haupternegerkreis ein. Diese Stromabnahme bewirkt in dem mit dem Haupterregerkreis gekoppelten Hilfserregerkreis eine Schwächung des Erregerfeldes der Erregermaschine c -und damit eine weitere Verkleinerung der induzierten EMK der Erregermaschine. Wird die Zeitkonstante dieses Hilfsernpgerkneises so gewählt, daß der negative Stromflluß im Stronn.-kreis der Hilfserregerwicklung d für längere Zeit die Feldschwächung der Erregermaschine bewirkt, so kann dadurch eine sehr rasche Entregung des Hauptgenerators erzielt werden. Der den Widerstand f im Ha:upterregerkreis überbrückende Schalter kann in Abhängigkeit von einem Differential- oder Erdschlußschutzrelais gesteuert werden.An exemplary embodiment of the invention is shown schematically in the drawing. is the generator to be excited with the excitation winding b and the excitation machine c. The excitation machine has an auxiliary excitation winding d which is inductively coupled to the main excitation circuit via the transformer e. In the main excitation circuit there is also the resistance f, which is normally bridged by the switchg. The actuating coil of switch g is energized when a fault occurs in the generator, so that the bridging of the resistance / is canceled. As a result, there is a sudden decrease in current in the main energy circuit almost simultaneously with the disturbance. In the auxiliary excitation circuit coupled to the main excitation circuit, this decrease in current causes a weakening of the excitation field of the excitation machine c - and thus a further reduction in the induced EMF of the excitation machine. If the time constant of this auxiliary energy circuit is chosen so that the negative current flow in the current circuit of the auxiliary excitation winding d causes the field of the exciter machine to be weakened for a long time, then the main generator can be de-excited very quickly. The switch bridging the resistance f in the main exciter circuit can be controlled as a function of a differential or earth fault protection relay.

Claims (3)

PATENTANSPRÜCHE: i. Einrichtung zur Schnellentregumg von Synchrongeneratoren, bei der auf die Erregermaschine des Synchrongenerators@eirne mit dem Erregerkreis dieses Generators reise induktiv gekoppelte Hilfserregerwicklung während der Entregung in feldschwächendem Sinne einwirkt, dadurch ge-' kennzeichnet, daß in dem Erregerkreis des Synchrongenerators (a, b) ,ein Widerstand (f) vorgesehen ist, der betriebsmäßig überbrückt und zu Beginn der Entregung eingeschaltet wird. PATENT CLAIMS: i. Device for the rapid deregulation of synchronous generators, in which an inductively coupled auxiliary excitation winding acts on the excitation machine of the synchronous generator @ an inductively coupled auxiliary excitation winding during the de-excitation in a field-weakening sense, characterized in that in the excitation circuit of the synchronous generator (a, b) , a resistor (f) is provided, which is bridged during operation and switched on at the beginning of the de-excitation. 2. Einrichtung nach Anspruch i, dadurch gekennzeichnet, daß der den Widerstand im Haupterregexkreis überbrückende Schalter von einem Differential- bzw. Erdschlußschutzrelais gesteuert wird. 2. Establishment according to claim i, characterized in that the resistance in the main excitation circuit Bridging switches controlled by a differential or earth fault protection relay will. 3. Einrichtung nach Anspruch i und 2, dadurch gekennzeichnet, daß die Zeitkonstante des Hilfserregerkneises so gewählt ist, daß der negative Stromfluß im Stromkreis der Hilfserregerwicklung (d) für längere Zeit die Feldschwächung der Erregermaschine (c) bewirkt.3. Device according to claim i and 2, characterized in that the time constant of the auxiliary excitation circuit is chosen so that the negative current flow in the circuit the auxiliary excitation winding (d) the field weakening of the excitation machine for a longer period of time (c) causes.
DE1930604937D 1930-09-09 1930-09-09 Device for the rapid de-excitation of synchronous generators Expired DE604937C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE604937T 1930-09-09

Publications (1)

Publication Number Publication Date
DE604937C true DE604937C (en) 1934-10-31

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ID=6575277

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930604937D Expired DE604937C (en) 1930-09-09 1930-09-09 Device for the rapid de-excitation of synchronous generators

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DE (1) DE604937C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1228708B (en) * 1955-07-14 1966-11-17 Siemens Ag Method and arrangement for the rapid de-excitation of alternators for welding machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1228708B (en) * 1955-07-14 1966-11-17 Siemens Ag Method and arrangement for the rapid de-excitation of alternators for welding machines

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