AT119312B - Asynchronous reactive power machine excited by its own network. - Google Patents

Asynchronous reactive power machine excited by its own network.

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Publication number
AT119312B
AT119312B AT119312DA AT119312B AT 119312 B AT119312 B AT 119312B AT 119312D A AT119312D A AT 119312DA AT 119312 B AT119312 B AT 119312B
Authority
AT
Austria
Prior art keywords
voltage
reactive power
network
machine
power machine
Prior art date
Application number
Other languages
German (de)
Original Assignee
Bbc Ag Oesterr
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 Ag Oesterr filed Critical Bbc Ag Oesterr
Application granted granted Critical
Publication of AT119312B publication Critical patent/AT119312B/en

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Description

  

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  Vom eigenen Netz erregte asynchrone   Blindleistllngsmaschine.   
 EMI1.1 
 

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 standes 11 zur Einstellung   der Über-oder   Untererregung der Maschine 2 ist bei konstantem Übersetzungsverhältnis des Transformators ohne Einfluss auf die durch eine Netzspannungsänderung bestimmter Grösse hervorgerufene Änderung der Blindleistung der Hauptmaschine. Eine bestimmte   Spannungsändemng   im Netz ruft bei jeder Erregung der Synchronmaschine 7 die gleiche Änderung der Blindleistung der Hauptmaschine hervor. Wird dagegen das Übersetzungsverhältnis des Transformators bei konstanter Erregung der Synchronmaschine verändert, so nimmt bei gleicher Spannungsänderung im Netz die Änderung der Blindleistung mit-abnehmender Übererregung zu.

   Unabhängig von der Einstellungsart der Erregung wird bei gegebener Netzspannungsänderung die Blindleistungsänderung um so grösser, je kleiner das Verhältnis von resultierender Erregerspannung zur Spannung der Maschine 7 gemacht wird. 



   Soll die Maschine 2 nur im übererregten Gebiet arbeiten, so kann zur Regelung der Blindleistung auch Bürstensteuerung am Frequenzwandler oder Regelung des Widerstandes 5 angewendet werden. 



  Bei geringer   Übererregung wird   dabei zweckmässig das Verhältnis von netzabhängiger zu konstanter Erregerspannung vergrössert, um einen zu starken Rückgang der Spannungsabhängigkeit der Blindleistungsmaschine zu vermeiden. 



   PATENT-ANSPRÜCHE :
1. Vom eigenen Netz erregte asynchrone Blindleistungsmaschine, dadurch gekennzeichnet, dass ihr Läuferkreis mittelbar oder unmittelbar von einer von der Netzspannung unabhängigen und konstanten, durch äusseren Eingriff regelbaren Spannung und einer dieser entgegengerichteten, der Netzspannung proportionalen Spannung gespeist wird, wobei für den Nennwert der Netzspannung die der Netzspannung proportionale Spannung   bei Übererregungkleiner, bei Untererregung grosser   als die konstante Spannung ist.



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  Asynchronous reactive power machine excited by its own network.
 EMI1.1
 

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 Standes 11 for setting the overexcitation or underexcitation of the machine 2 is with a constant transformation ratio of the transformer without influence on the change in the reactive power of the main machine caused by a change in the mains voltage of a certain magnitude. A certain voltage change in the network causes the same change in the reactive power of the main machine with every excitation of the synchronous machine 7. If, on the other hand, the transformation ratio of the transformer is changed with constant excitation of the synchronous machine, the change in reactive power increases with decreasing overexcitation with the same voltage change in the network.

   Regardless of the type of setting of the excitation, the change in reactive power is greater, the smaller the ratio of the resulting excitation voltage to the voltage of the machine 7 is made for a given line voltage change.



   If the machine 2 is to work only in the overexcited area, brush control on the frequency converter or regulation of the resistor 5 can also be used to regulate the reactive power.



  In the case of low overexcitation, the ratio of network-dependent to constant excitation voltage is expediently increased in order to avoid an excessive decrease in the voltage dependency of the reactive power machine.



   PATENT CLAIMS:
1. Asynchronous reactive power machine excited by its own network, characterized in that its rotor circuit is fed indirectly or directly by a constant voltage that is independent of the network voltage and controllable by external intervention and a voltage that is opposite to this and is proportional to the network voltage, with the nominal value of the network voltage the voltage proportional to the mains voltage is smaller in the event of overexcitation and greater than the constant voltage in the event of underexcitation.

Claims (1)

2. Maschine nach Anspruch 1, dadurch gekennzeichnet, dass zur Erzeugung der konstanten Spannung ein an das Netz angeschlossener Synchron-Synchronumformer dient. 2. Machine according to claim 1, characterized in that a synchronous-synchronous converter connected to the network is used to generate the constant voltage. 3. Maschine nach Anspruch 1, dadurch gekennzeichnet, dass die Blindleistung der Maschine durch Regelung der von der Netzspannung unabhängigen Spannung bei konstantem Verhältnis der Netzspannung zu der ihr proportionalen Spannung geregelt wird. 3. Machine according to claim 1, characterized in that the reactive power of the machine is regulated by regulating the voltage independent of the mains voltage with a constant ratio of the mains voltage to the voltage proportional to it. 4. Maschine nach Anspruch l, dadurch gekennzeichnet, dass die Blindleistung der Maschine durch Regelung des Verhältnisses der Netzspannung zu der ihr proportionalen Spannung bei Konstanthaltnng der von der Netzspannung unabhängigen Spannung geregelt wird. EMI2.1 4. Machine according to claim l, characterized in that the reactive power of the machine is regulated by regulating the ratio of the mains voltage to the voltage proportional to it while keeping the voltage independent of the mains voltage constant. EMI2.1
AT119312D 1928-04-12 1929-03-25 Asynchronous reactive power machine excited by its own network. AT119312B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE119312X 1928-04-12

Publications (1)

Publication Number Publication Date
AT119312B true AT119312B (en) 1930-10-10

Family

ID=5655994

Family Applications (1)

Application Number Title Priority Date Filing Date
AT119312D AT119312B (en) 1928-04-12 1929-03-25 Asynchronous reactive power machine excited by its own network.

Country Status (1)

Country Link
AT (1) AT119312B (en)

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