AT48834B - Device for determining the presence and direction of equalizing currents in AC systems. - Google Patents

Device for determining the presence and direction of equalizing currents in AC systems.

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Publication number
AT48834B
AT48834B AT48834DA AT48834B AT 48834 B AT48834 B AT 48834B AT 48834D A AT48834D A AT 48834DA AT 48834 B AT48834 B AT 48834B
Authority
AT
Austria
Prior art keywords
systems
determining
equalizing currents
windings
groups
Prior art date
Application number
Other languages
German (de)
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AT48834B publication Critical patent/AT48834B/en

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  • Supply And Distribution Of Alternating Current (AREA)

Description

  

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 der Phasenvergleicher in Reihe mit Strom versorgt. Der Vorteil dieser Einrichtung besteht darin, dass der diese Wicklungen w2 durch fliessende Summenstrom in allen Wicklungen unbedingt gleich ist und diese dadurch völlig unabhängig von bei Parallelschaltung zuweilen Fehler bedingenden Umstanden, beispielsweise der verschiedenen Länge der Verbindungsleitungen sind. 



   Man kann die in Fig. 3 dargestellte Einrichtung auch gleichzeitig für die Einschaltung der den Summenstrom   überwachenden   Messinstrumente benutzen, indem man diese an die 
 EMI2.2 
 Gesamtstromes in die Leitungen l1 oder l2 unmittelbar oder über Stromwandler eingeschaltet werden. 



   Fig. 4 zeigt schliesslich eine Einrichtung, welche für Anlagen mit einer grösseren Anzahl von Stromerzeugern bestimmt ist und di"dadurch Vorteile bietet, dass sie auch beim Betrieb nur einzelner der Maschinen deren genaue Regelung ermöglicht. Es sind dabei die Stromerzeuger A. B, C und   Al,     Bl,   01 in Gruppen, und zwar vorzugsweise, wie dargestellt, von drei 
 EMI2.3 
 einander erfolgt mittels eines weiteren Phasenvergleichers P4, dessen beide Wicklungen je in Reihe mit den Summenstromwicklungen w2 der   Phasenvergleicher   beider Gruppen geschaltet sind, so dass er also die Gesamtbelastungen der Gruppen im Verhältnis zueinander vergleicht. 



   Die geschilderte Einrichtung lässt sich natürlich auch bei Anlagen mit noch grösserer Zahl von Stromerzeugern anwenden, wobei dann zwischen jede Gruppe je ein Gruppenphasenvergleicher einzuschalten ist. Es können ferner, um noch grössere Genauigkeiten zu erzielen, Gruppen zu je zwei Maschinen verwendet werden. 



   PATENT-ANSPRÜCHE :
1. Einrichtung zum Feststellen des Vorhandenseins und der Richtung von Ausgleichströmen in Wechselstromanlagen, bei welcher in den den einzelnen Maschinen zugeordneten   Phasen-   vcrgleiehern auf ein bewegliches System infolge der Phasenverschiebung zwischen dem Gesamtstrom der parallel geschalteten Maschinen und deren Einzelströmen Drehmomente   ausgeübt.   
 EMI2.4 
 von dem betreffenden   Phasenvprgleicher zugehörigen, in gleichliegende   Phasen der Stromerzeuger eingeschalteten, für gleichen Sekundärstrom eingerichteten Stromtransformatoren (T1, T2, T3) 
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 the phase comparator is powered in series. The advantage of this device is that the total current flowing through these windings w2 is absolutely the same in all windings and these are therefore completely independent of circumstances that sometimes cause errors in parallel connection, for example the different lengths of the connecting lines.



   The device shown in FIG. 3 can also be used at the same time for switching on the measuring instruments monitoring the total current by connecting them to the
 EMI2.2
 Total current in the lines l1 or l2 can be switched on directly or via a current transformer.



   Finally, FIG. 4 shows a device which is intended for systems with a larger number of power generators and which offers advantages in that it enables precise control even when only individual machines are in operation. The power generators A. B, C and Al, B1, 01 in groups, preferably, as shown, of three
 EMI2.3
 each other takes place by means of a further phase comparator P4, the two windings of which are connected in series with the total current windings w2 of the phase comparators of both groups, so that it compares the total loads of the groups in relation to one another.



   The device described can of course also be used in systems with an even larger number of power generators, in which case a group phase comparator has to be connected between each group. In order to achieve even greater accuracy, groups of two machines each can be used.



   PATENT CLAIMS:
1. Device for determining the presence and direction of equalizing currents in AC systems, in which torques are exerted in the phase comparators assigned to the individual machines on a moving system as a result of the phase shift between the total current of the machines connected in parallel and their individual currents.
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 Current transformers (T1, T2, T3) associated with the phase comparator in question, switched on in the same phases of the power generators and set up for the same secondary current
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Claims (1)

Sekundärtransformatorenspulen (s) gemeinsam abgenommenen, mithin der Summe der Einzelströme entsprechenden Strom durchflossen wird 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass je eine Wicklung (Ult) EMI2.6 Secondary transformer coils (s) removed together, thus the current corresponding to the sum of the individual currents flows through 2. Device according to claim 1, characterized in that each one winding (Ult) EMI2.6
AT48834D 1909-10-26 1910-08-23 Device for determining the presence and direction of equalizing currents in AC systems. AT48834B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE48834X 1909-10-26

Publications (1)

Publication Number Publication Date
AT48834B true AT48834B (en) 1911-07-10

Family

ID=5626116

Family Applications (1)

Application Number Title Priority Date Filing Date
AT48834D AT48834B (en) 1909-10-26 1910-08-23 Device for determining the presence and direction of equalizing currents in AC systems.

Country Status (1)

Country Link
AT (1) AT48834B (en)

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