DE755902C - Arrangement for suppressing the fifth harmonic of the current in a three-phase network - Google Patents

Arrangement for suppressing the fifth harmonic of the current in a three-phase network

Info

Publication number
DE755902C
DE755902C DEA76473D DEA0076473D DE755902C DE 755902 C DE755902 C DE 755902C DE A76473 D DEA76473 D DE A76473D DE A0076473 D DEA0076473 D DE A0076473D DE 755902 C DE755902 C DE 755902C
Authority
DE
Germany
Prior art keywords
network
current
harmonic
arrangement
suppressing
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
DEA76473D
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.)
AEG AG
Original Assignee
AEG 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 AEG AG filed Critical AEG AG
Priority to DEA76473D priority Critical patent/DE755902C/en
Application granted granted Critical
Publication of DE755902C publication Critical patent/DE755902C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/38—Auxiliary core members; Auxiliary coils or windings
    • H01F27/385—Auxiliary core members; Auxiliary coils or windings for reducing harmonics

Description

Die Erfindung betrifft eine Anordnung, um die in einem Leitungsnetz auftretende fünfte Harmonische der Grundwelle des Stromes zu kompensieren. Die Erfindung beruht auf der Erkenntnis, daß bei zwei parallel geschalteten induktiven Apparaten, von denen der eine in Stern und der andere in Dreieck geschaltet ist und welche daher bezüglich der Grund"velle eine Phasenverschiebung von 30° besitzen, die von jedem Apparat aus dem Netz entnommenen fünften Harmonischen eine Phasenverschiebung von 5 # 30 = 15o° gegeneinander besitzen, also nahezu in Gegenphase zueinander sind. Bei einem Leitungsnetz ist man aber nur selten in der Lage, die Schaltung der daran angeschlossenen Transformatoren mit Rücksicht auf die: fünfte Harmonische zu bestimmen. Vielmehr sind hierfür andere Gesichtspunkte maßgebend. Es ist daher zweckmäßiger, zur Aufhebung der fünften Harmonischen einen zusätzlichen dreiphasigen induktiven Apparat an das Netz anzuschließen.The invention relates to an arrangement to that in a line network to compensate occurring fifth harmonic of the fundamental wave of the current. The invention is based on the knowledge that with two inductive devices connected in parallel, one of which is connected in star and the other in delta and which therefore have a phase shift of 30 ° with respect to the fundamental wave, that of a phase shift of every fifth harmonic taken from the network of 5 # 30 = 15o ° against each other, i.e. they are almost in phase opposition to each other. In the case of a line network, however, one is rarely able to switch the circuit on it connected transformers with regard to the: fifth harmonic to be determined. Rather, other aspects are decisive for this. It is therefore more appropriate to cancel the fifth harmonic an additional three-phase inductive Connect the device to the network.

Gemäß der Erfindung wird eine hochgesättigte Drosselspule an das Netz angeschlossen, welche so bemessen und. geschaltet ist, daß sie eine gegenphasige fünfte Stromharmonische in der Größenordnung der von den andern Apparaten dem Netz entnommenen fünften Stromharmonischen aufnimmt. Es kommt mithin für die Drosselspule eine Sternschaltung in Frage, wenn: die ans Netz angeschlossenen Transformatoren vorzugsweise in Dreieck geschaltet sind, und umgekehrt eine Dreieckschaltung, wenn die ans Netz angeschlossenen Transformatoren vorzugsweise in Stern geschaltet sind. Die Drosselspule kann infolge der hohen Sättigung des Eisenkerns recht klein gehalten werden. Im Bedarfsfall wird man sogar den Eisenkern, mit einer Sekundärwicklung versehen, der man in beschränktem Maß eine Leistung entnehmen kann. Die zurr Aufnahme der gewünschten fünften Harmonischen bestimmte Drosselspule kann entweder unmittelbar ans Netz angeschlossen werden oder auch mit einem der ans Netz angeschlossenen Transformatoren vereinigt bzw. in dessen Gehäuse eingebaut werden.According to the invention, a highly saturated choke coil is connected to the network connected, which so sized and. is connected so that they are in phase opposition fifth current harmonic in the order of magnitude of the other devices in the network picked up fifth current harmonics. It therefore comes for the choke coil a star connection is possible if: the transformers connected to the network are preferably connected in delta, and vice versa a delta connection if the transformers connected to the network are preferably connected in star. The choke coil can be kept quite small due to the high saturation of the iron core will. If necessary, you can even use the iron core with a secondary winding provided, from which one can derive a performance to a limited extent. The recording the desired fifth harmonic specific inductor can either be immediate connected to the grid or with one of the transformers connected to the grid be combined or installed in its housing.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es sind R, 5', T die drei Leitungen eines Drehstromnetzes. An dieses ist der Transformator d angeschlossen, dessen miit dem Netz verbundene Wicklung in Stern geschaltet ist. Zur Kompensation der vom Transformator a dem Netz entnommenen fünften Harmonischen ist eine Drosselspule b vorgesehen, die in Dreieck geschaltet ist. Sie besitzt eine Sekundärwicklung c, welche in beschränktem Maß zur Leistungsabgabe herangezogen werden kann.An exemplary embodiment of the invention is shown in the drawing. R, 5 ', T are the three lines of a three-phase network. At this is the transformer d, whose winding connected to the network is connected in star. To compensate for the fifth harmonic taken from the network by transformer a a choke coil b is provided, which is connected in delta. She owns one Secondary winding c, which is used to a limited extent for power output can be.

Claims (2)

PATI:NTANSPßt caE: i. Anordnung zur Unterdrückung der fünften Harmonischen des Stromes in einem Drehstromnetz, dadurch gekennzeichnet, daß an das Netz eine hochgesättigte Drosselspule angeschlossen ist, welche so bemessen und geschaltet ist, daß sie eine gegenphasige- fünfte Stromharznoonische in der Größenordnung der von den anderen Apparaten dem Netz entnommenen fünften Stromharmonischen aufnimmt. PATI: NTANSPasst caE: i. Arrangement for suppressing the fifth harmonic of the current in a three-phase network, characterized in that a Highly saturated choke coil is connected, which is dimensioned and switched is that they have an anti-phase fifth current resinnoonic of the order of magnitude picks up fifth current harmonics taken from the network by the other devices. 2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Drosselspule mit einem der Netztransformatoren vereinigt bzw. in dessen Gehäuse eingebaut ist. Zur Abgrenzung des Erfindungsgegenstands vom Stand der Technik sind im Erteilungsverfahren folgende Druckschriften in Betracht gezogen worden: Französische Patentschrift Nr. 571 Gig; Elektrotechnische Zeitschrift, 1929, S. r196.2. Arrangement according to claim 1, characterized in that the choke coil with a the network transformers are combined or built into its housing. For demarcation of the subject matter of the invention from the prior art are the following in the grant procedure Documents considered: French Patent No. 571 Gig; Elektrotechnische Zeitschrift, 1929, p. R196.
DEA76473D 1935-07-11 1935-07-11 Arrangement for suppressing the fifth harmonic of the current in a three-phase network Expired DE755902C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA76473D DE755902C (en) 1935-07-11 1935-07-11 Arrangement for suppressing the fifth harmonic of the current in a three-phase network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA76473D DE755902C (en) 1935-07-11 1935-07-11 Arrangement for suppressing the fifth harmonic of the current in a three-phase network

Publications (1)

Publication Number Publication Date
DE755902C true DE755902C (en) 1954-02-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEA76473D Expired DE755902C (en) 1935-07-11 1935-07-11 Arrangement for suppressing the fifth harmonic of the current in a three-phase network

Country Status (1)

Country Link
DE (1) DE755902C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR571619A (en) * 1922-10-09 1924-05-21 Brown Assembly for rectifier installations

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR571619A (en) * 1922-10-09 1924-05-21 Brown Assembly for rectifier installations

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