EP3786986B1 - Circuit de réduction d'une part de flux continu dans le noyau magnétique mou d'un transformateur - Google Patents

Circuit de réduction d'une part de flux continu dans le noyau magnétique mou d'un transformateur Download PDF

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Publication number
EP3786986B1
EP3786986B1 EP19194173.1A EP19194173A EP3786986B1 EP 3786986 B1 EP3786986 B1 EP 3786986B1 EP 19194173 A EP19194173 A EP 19194173A EP 3786986 B1 EP3786986 B1 EP 3786986B1
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EP
European Patent Office
Prior art keywords
current
transformer
limiting reactor
magnetic core
circuit arrangement
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.)
Active
Application number
EP19194173.1A
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German (de)
English (en)
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EP3786986A1 (fr
Inventor
Peter Hamberger
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.)
Siemens Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
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.)
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Publication date
Application filed by Siemens Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Priority to EP19194173.1A priority Critical patent/EP3786986B1/fr
Publication of EP3786986A1 publication Critical patent/EP3786986A1/fr
Application granted granted Critical
Publication of EP3786986B1 publication Critical patent/EP3786986B1/fr
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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
    • 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
    • H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias

Definitions

  • the invention relates to a circuit arrangement for reducing a direct flux component in the soft magnetic core of a transformer.
  • an undesirable direct current can be fed into the primary winding or secondary winding.
  • a direct current feed also referred to as a DC component
  • GIC geomagnetically induced currents
  • direct current is specifically introduced into a compensation winding CW in order to cancel the direct current magnetization of the transformer core.
  • the alternating voltage induced in the compensation winding CW is used; the compensation winding 1 acts like an ideal alternating voltage source.
  • a diode D1 is connected to the compensation winding CW in series with a current-limiting choke L, by means of which the voltage induced in the compensation voltage CW is rectified.
  • the direct current obtained in this way is indirectly proportional to the effective inductance I DC ⁇ 1/L of the current limiting choke.
  • this is constructed from partial inductances L1, L2, L3, L4 that can be switched using semiconductor switches S 1 , S2,... Sn and therefore has an adjustable inductance.
  • the direct current can be changed in N equal partial steps (increments).
  • a transractor is understood to mean the combination of transductor and choke.
  • the transractor only has to provide the Nth part of the direct current and can be made much more compact than with the solution according to AT 519 338 A1 the case is.
  • Another significant advantage of the solution according to the invention is that the current pulses generated by means of the current limiting choke L and diode D1 only have the fundamental harmonic and a direct current mean value.
  • the partial inductances L1, L2, L3, L4 can be implemented, for example, by taps in the winding of a choke or by separate partial chokes.
  • the construction output of the transractor is comparatively low, it can be implemented with inexpensive standard components.
  • the size of the converter can also be reduced to act on the secondary side of the transractor. It is therefore also possible to do without a control transformer for voltage compensation on the secondary side, which further reduces the space requirement of the solution according to the invention.
  • a preferred embodiment of the invention comprises a controllable resistor ES, which is connected in parallel to the current-limiting choke L instead of a transractor for continuous adjustment of the direct current.
  • the power loss occurring at the controllable resistor ES can be neglected since only the Nth part of the direct current has to be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)

Claims (4)

  1. Montage de diminution d'une composante de flux continu dans un noyau à magnétisme doux d'un transformateur, comprenant un enroulement (CW) de compensation, qui est couplé magnétiquement au noyau du transformateur, dans lequel sur l'enroulement de compensation est montée une diode (D1) et en série avec elle une bobine (L) de limitation du courant, au moyen desquelles la tension induite dans l'enroulement (CW) de compensation est redressée, caractérisé en ce que la bobine (L) de limitation du courant est composée d'inductances partielles pouvant être mises hors circuit au moyen d'interrupteurs (S1, S2, S3, ... SN) à semi-conducteur et a donc une inductance réglable, de sorte qu'en mettant en circuit et hors circuit des inductances (L1, L2, L3, L4) partielles le courant continu peut être modifié, les inductances (L1, L2, L3, L4) partielles pouvant être mises hors circuit étant montées en série avec possibilité d'être mises en circuit.
  2. Montage suivant la revendication 1, caractérisé en ce qu'un transformateur (T) est monté en parallèle avec la bobine (L) de limitation du courant.
  3. Montage suivant la revendication 1, caractérisé en ce qu'une résistance (ES) pouvant être commandée est montée en parallèle avec la bobine (L) de limitation du courant.
  4. Montage suivant l'une des revendications 1 à 3, caractérisé en ce que pour la formation des inductances partielles, l'enroulement de la bobine (L) de limitation du courant est pourvu de plusieurs prises,
    dans lequel les interrupteurs à semi-conducteur sont montés sous la forme d'interrupteurs (S1, S2, S3, S4) synchronisés à étage pour la commande des prises.
EP19194173.1A 2019-08-28 2019-08-28 Circuit de réduction d'une part de flux continu dans le noyau magnétique mou d'un transformateur Active EP3786986B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19194173.1A EP3786986B1 (fr) 2019-08-28 2019-08-28 Circuit de réduction d'une part de flux continu dans le noyau magnétique mou d'un transformateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19194173.1A EP3786986B1 (fr) 2019-08-28 2019-08-28 Circuit de réduction d'une part de flux continu dans le noyau magnétique mou d'un transformateur

Publications (2)

Publication Number Publication Date
EP3786986A1 EP3786986A1 (fr) 2021-03-03
EP3786986B1 true EP3786986B1 (fr) 2023-10-04

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Family Applications (1)

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EP19194173.1A Active EP3786986B1 (fr) 2019-08-28 2019-08-28 Circuit de réduction d'une part de flux continu dans le noyau magnétique mou d'un transformateur

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EP (1) EP3786986B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3786987B1 (fr) * 2019-08-30 2022-07-20 Siemens Energy Global GmbH & Co. KG Dispositif de suppression d'une composante courant continu lors du fonctionnement d'un appareil électrique connecté à un réseau haute tension

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3783630A1 (fr) * 2019-08-22 2021-02-24 Siemens Energy Global GmbH & Co. KG Dispositif de suppression d'une composante courant continu lors du fonctionnement d'un appareil électrique connecté à un réseau haute tension

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2723767A1 (de) * 1977-05-26 1978-11-30 Messer Griesheim Gmbh Wechselstromschweisstromquelle
DE4021860C2 (de) * 1990-07-09 1996-08-22 Siemens Ag Schaltungsanordnung und Verfahren zur Minderung eines Geräusches bei einem Transformator
CN103270561B (zh) 2010-09-29 2016-09-21 西门子公司 用于减少变压器芯中的单向磁通分量的设备和方法
WO2015086048A1 (fr) * 2013-12-10 2015-06-18 Siemens Aktiengesellschaft Dispositif et procédé visant à réduire une composante de flux magnétique continu dans le noyau d'un transformateur
EP3196902B1 (fr) * 2016-01-25 2019-04-24 Siemens Aktiengesellschaft Circuit de reduction d'une part du flux continu dans le noyau magnetique doux d'un transformateur
AT519338A1 (de) 2016-11-15 2018-05-15 Siemens Ag Schaltungsanordnung zur Verringerung eines Gleichfluss-Anteils im weichmagnetischen Kern eines Transformators

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3783630A1 (fr) * 2019-08-22 2021-02-24 Siemens Energy Global GmbH & Co. KG Dispositif de suppression d'une composante courant continu lors du fonctionnement d'un appareil électrique connecté à un réseau haute tension

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EP3786986A1 (fr) 2021-03-03

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