DE372056C - Procedure for bumpless switching on of asynchronous generators - Google Patents

Procedure for bumpless switching on of asynchronous generators

Info

Publication number
DE372056C
DE372056C DEB95586D DEB0095586D DE372056C DE 372056 C DE372056 C DE 372056C DE B95586 D DEB95586 D DE B95586D DE B0095586 D DEB0095586 D DE B0095586D DE 372056 C DE372056 C DE 372056C
Authority
DE
Germany
Prior art keywords
procedure
asynchronous generators
generator
bumpless switching
speed
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
DEB95586D
Other languages
German (de)
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.)
Bergmann Elektricitaets Werke AG
Original Assignee
Bergmann Elektricitaets Werke AG
Publication date
Priority to DEB95586D priority Critical patent/DE372056C/en
Application granted granted Critical
Publication of DE372056C publication Critical patent/DE372056C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
    • H02P1/34—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive reduction of impedance in secondary circuit

Landscapes

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

Description

Verfahren zum stoßfreien Einschalten von Asynchrongeneratoren. Asynchrongeneratoren werden nach der Erfindung auf folgende Weise stoßfrei eingeschaltet: Der Generator wird zunächst auf annähernd synchrone Drehzahl gebracht und dann bei offener Sekundärseite an die Spannung :gelegt. Auf der Sekundärseite ist dabei ein Meßinstrument angeschlossen, das durch entsprechende Schwingungen nie sekundäre Frequenz anzeigt. Die Drehzahl wird nun so geregelt, daß die Schwingungen des Meßinstrumentes möglichst langsam erfolgen, also die sekundäre Frequenz möglichst gering ist. Erst wenn dieser Zustand erreicht ist, wird der Sekundärstromkreis kurzgeschlossen.Procedure for bumpless switching on of asynchronous generators. Asynchronous generators are switched on smoothly according to the invention in the following way: The generator is first brought to an approximately synchronous speed and then with the secondary side open to the tension: laid. A measuring instrument is connected to the secondary side, which never shows secondary frequency due to corresponding vibrations. The speed is now regulated so that the vibrations of the measuring instrument as slowly as possible take place, so the secondary frequency is as low as possible. Only when this condition is reached, the secondary circuit is short-circuited.

An Hand der Zeichnung ist das neue Verfahren näher erläutert. Während 4er Generator auf annähernd synchrone Drehzahl gebracht wird, ist sowohl der Schalter auf der Statorseite als der Kurzschließer auf der Rotorseite geöffnet. Alsdann wird zunächst der Schalter auf der Statorseite geschlossen, während der Kurzschließer auf der Rotor-Seite offen bleibt. Im Gegensatz zu -dem bekennten Einschaltverfahren, .das .mit geschlossenem Rotorstromkreis arbeitet, führt dabei die Maschine außer dem Magnetisieru.ngsstrom noch keinen Strom. Es tritt jedoch ein Drehfell auf, und durch dieses wird in der Rotorwicklung eine Wcehselspannung hervorgebracht, deren Größe und Frequenz der Abweichung vom Synchronismus entspricht. Um genau auf Synchronismus einstellen zu können, ist daher z. B. zwischen zwei Rotorphasen ein Voltmeter gelegt. Zeigt dieses die Spannung Null an, so steht damit fest, daß .der Generator synchron läuft, und zwar, was von Wichtigkeit ist, für die jeweils tatsächlich vorhandene Netzfrequenz. Die Drehzahl des Generators wird .also so geregelt, daß das Voltmeter möglichst die Spannung Null anzeigt. Dann :erst wird mittels des Kurzschließers der Rotorstromkreis geschlossen, ohne .daß sich dabei ein Stromstoß ergibt, und die Maschine kann, übersynchron angetrieben, als Generator Leistung an das Netz abgeben.The new process is explained in more detail using the drawing. While 4 generator is brought to almost synchronous speed, is both the switch open on the stator side than the short circuiter on the rotor side. Then will initially the switch on the stator side is closed, while the short-circuiter remains open on the rotor side. In contrast to the well-known switch-on procedure, .that .works with a closed rotor circuit, the machine also performs the magnetizing current does not yet have any current. However, a rotary skin occurs, and through this an alternating voltage is produced in the rotor winding, whose Size and frequency corresponds to the deviation from synchronism. To be exact on synchronism to be able to adjust is therefore z. B. placed a voltmeter between two rotor phases. If this shows the voltage zero, then it is certain that the generator is synchronous runs, and that is important for what is actually present Grid frequency. The speed of the generator is regulated so that the voltmeter if possible shows the voltage zero. Then: only by means of the short-circuiter the rotor circuit is closed without .that there is a current surge, and the machine, driven over-synchronously, can supply power to the grid as a generator hand over.

Claims (2)

P.1TF_NT-ANSPRÜCHR: i. Verfahren zum stoßfreien Einschalten von Asynchrongeneratoren, dadurch gekennzeichnet, daß der Generator bei offenem Sekundärstromkreis an :die Spannung gelegt, die sekundäre Frequenz durch Einstellung der Drehzahl auf einen möglichst geringen Wert gebracht und dann erst der Sekundärstromkreis kurzgeschlossen wird. P.1TF_NT-ANSPRÜCHR: i. Procedure for bumpless switching on of asynchronous generators, characterized in that the generator with the secondary circuit open to: the Voltage applied, the secondary frequency by setting the speed to one brought the lowest possible value and only then short-circuited the secondary circuit will. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß der Generator bei angenähert synchroner Drehzahl an die Spannung gelegt wird.2. The method according to claim i, characterized in that the generator at approximately synchronous speed is applied to the voltage.
DEB95586D Procedure for bumpless switching on of asynchronous generators Expired DE372056C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB95586D DE372056C (en) Procedure for bumpless switching on of asynchronous generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB95586D DE372056C (en) Procedure for bumpless switching on of asynchronous generators

Publications (1)

Publication Number Publication Date
DE372056C true DE372056C (en) 1923-03-20

Family

ID=6988227

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB95586D Expired DE372056C (en) Procedure for bumpless switching on of asynchronous generators

Country Status (1)

Country Link
DE (1) DE372056C (en)

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