EP3065150A1 - Transformateur et procédé de rééquipement d'un transformateur - Google Patents

Transformateur et procédé de rééquipement d'un transformateur Download PDF

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Publication number
EP3065150A1
EP3065150A1 EP15157688.1A EP15157688A EP3065150A1 EP 3065150 A1 EP3065150 A1 EP 3065150A1 EP 15157688 A EP15157688 A EP 15157688A EP 3065150 A1 EP3065150 A1 EP 3065150A1
Authority
EP
European Patent Office
Prior art keywords
transformer
yoke
compensation
winding arrangement
leg
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.)
Granted
Application number
EP15157688.1A
Other languages
German (de)
English (en)
Other versions
EP3065150B1 (fr
Inventor
Alfons-Karl Schrammel
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 AG
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
Priority to EP15157688.1A priority Critical patent/EP3065150B1/fr
Priority to EP16703763.9A priority patent/EP3224844B1/fr
Priority to CN201680013885.6A priority patent/CN107430927B/zh
Priority to US15/554,952 priority patent/US10559420B2/en
Priority to CA2977716A priority patent/CA2977716C/fr
Priority to PCT/EP2016/052626 priority patent/WO2016139030A1/fr
Publication of EP3065150A1 publication Critical patent/EP3065150A1/fr
Application granted granted Critical
Publication of EP3065150B1 publication Critical patent/EP3065150B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • 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
    • 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

Definitions

  • the invention relates generally to the field of electrical transformers provided with compensation means for compensating for a DC magnetic flux component.
  • DC component direct current
  • Cause of this DC component can be, for example, power electronic circuits, as you are used today in the control of electrical drives or for reactive power compensation in an energy distribution network.
  • GIC Garnier Induced Currents
  • a so-called compensation winding To reduce the noise emission of a transformer is used in the DE 40 21 860 C2
  • a so-called compensation winding In this compensation winding, a compensation current is fed, which is directed in its magnetic effect so that it counteracts or compensates for the magnetic direct flux in the core of the transformer.
  • a measuring device for detecting the DC component is for example from the WO2011 / 127969 A1 known.
  • a compensation winding in conjunction with a current control device is for example from the WO2012 / 041368 A1 known.
  • the compensation winding is already provided in the manufacture of the transformer, for example, by carrying each such arm of the transformer in the region of the lower yoke such a compensation winding.
  • the object is achieved with a transformer by the features of claim 1 and with a method for retrofitting a transformer by the features of claim 7.
  • a compensation winding arrangement which is not arranged on a winding-carrying leg of the transformer but on the yoke of the transformer core, as hitherto usual.
  • This compensation winding arrangement is electrically connected to at least one associated current control device for the purpose of compensating for a DC component flowing in one leg of the transformer. Since the yoke carries the compensation winding arrangement, it is achieved that the structural design and also the arrangement of the primary winding or the secondary winding, as well as the structural design of the core of the transformer need not be changed.
  • the transformer only has to be taken off the grid for a short time and an access to the upper yoke of the transformer has to be created.
  • the transformer cover is opened and the insulation and cooling liquid is partially pumped out. Once the level of isolation and cooling liquid is lowered to a level below the upper yoke, a compensating winding can be manually manually attached to the upper yoke, at one or more sections.
  • the compensation winding is connected by means of a connecting line to a power supply device outside the boiler. Subsequently, the insulation and cooling liquid is pumped back to the original level in the transformer tank.
  • the transformer cover is closed and the transformer can then be switched back to the mains.
  • the invention thus makes it possible, with comparatively little effort, to have a transformer already in operation, irrespective of the design of a transformer (for example single-core or multi-leg core construction), in which it becomes an infeed during operation a DC share or exposed to a GDC should be equipped with a DC compensation device.
  • This opens up the possibility for these already operationally used transformers to lower losses, to reduce the warming, as well as to curb their noise emission. In particular, the latter is becoming increasingly important.
  • the advantages mentioned above also result in an analogous manner in the production of a transformer: even in the production process, the inventive arrangement of the compensation winding arrangement on the yoke requires no change to an existing design of a transformer, neither the winding nor the magnetic core.
  • the compensation winding arrangement is arranged on a portion of the upper yoke. At the upper yoke a compensation winding can be attached easily. A “retrofit solution” is possible at low cost.
  • an embodiment of the invention may be preferably constructed such that the compensation winding assembly is formed of a plurality of winding loops, each passed through a cooling gap between a press plate and an upper yoke section.
  • This installation space is usually available as a cooling gap in larger power transformers anyway. It requires no structural change a winding or insulation. The looping takes place directly around the yoke.
  • a preferred embodiment may be constructed such that at least two loops of the compensation winding assembly always loop around a portion of the upper yoke between two main legs. These are in turn passed through the cooling gap formed between the outer lamination of the yoke and the adjacent opposing pressure plate.
  • the compensation winding arrangement can be formed from at least two conductor loops. Each of these conductor loops continues with sections extending in the direction of the yoke. A first corresponding line pair of these line sections is connected to each other, for example by crimping. The second corresponding line pair ends in connection contacts. At this an associated power control device is connected by means of a connecting line. As a result, an individually predetermined compensation current can be fed in for each main limb. This allows a differentiated, matched to the main leg compensation of a DC component ⁇ DC .
  • the compensation winding can be formed from one or more windings, adapted to the predetermined voltage burden of the current control device used.
  • This method makes it possible, with very little effort, to retrofit a transformer that is already in operation, including transformers of older design, with a compensation device.
  • the compensation winding is simply wrapped around portions of the upper yoke.
  • existing channels of the cooling system can be used.
  • the individual loops of the compensation winding are simply passed through between the yoke press plates and the yoke.
  • each winding can consist of one or more windings.
  • the winding loops are connected to each other and connected to a power control device. This power control device is usually located outside of the transformer tank.
  • transformers are designed for a long service life. If, for example, an increased noise level develops in such a transformer, which has been in operation for years, due to a DC feed, then this transformer can be modernized with little modification and equipped with the functionality of a DC compensation, so that the transformer is quieter during operation.
  • FIG Figures 1-5 each showing the upper portion of a magnetic core of a particular type of transformer in a spatial representation.
  • Corresponding structural units are provided with the same reference numerals.
  • a conductor loop is generally understood to mean a surface defined by a conductor, wherein the conductor loop is intended to embody an elementary form of a winding, which may consist of a single turn or also of several turns.
  • each of the conductor structures identified below by the reference numeral 12 is to be understood as either a single loop or a multi-turn winding.
  • FIG. 1 shows in a perspective view of the upper portion of the magnetic core of an electrical transformer 1 in 1-leg-core construction.
  • the middle leg 10 of the transformer 1 carries an in figure 1 Winding arrangement not shown, consisting of primary winding and secondary winding; the two legs left and right of the leg 10 form the magnetic inference of this construction.
  • a yoke 11 connects the two return legs and the middle leg 10 FIG. 1 are two yoke-pressing plates 6, 8 drawn by means of which the sheet-metal plates of Jochblechwovenes 11 are pressed together. Between the front yoke press plate 8 and the yoke 11, a clearance or cooling gap 9 is formed, as well as between the back yoke press plate 6 and the yoke 11, a cooling gap 7 FIG.
  • the compensation winding assembly 12 is disposed on the yoke 11 in the region of the middle leg 10.
  • the compensation winding arrangement 12 essentially consists of two conductor loops 13, 15. Each of these conductor loops 13, 15 wraps around a section of the upper yoke 11 formed between limb 10 and magnetic yoke. After their looping around, the two conductor loops 13, 15 pass through conductor sections 17,18, which extend in the longitudinal direction of the yoke 11.
  • the two rear converging conductor sections 17, 18 are in the gap 7. Their ends are connected by crimping.
  • the two front conductor sections 17, 18 extend in the front gap 9. Their ends form contact terminals for a connecting line, which leads to an in FIG. 1 with the reference numeral 120 provided current control means.
  • the current control device 120 serves to feed in a compensation current whose magnetic effect in the transformer core is explained below with reference to the description of FIG. 6 is explained in more detail.
  • the injection of the compensation current is carried out in accordance with a sensor that detects the disturbing DC component according to direction and size. This sensor is not shown in the drawings.
  • FIG. 2 shows an embodiment of the invention with reference to a core for a 2-leg core transformer 2.
  • the magnetic core consists of two legs 10, each carrying the transformer winding.
  • the two legs 10 are connected by the yoke 11.
  • a compensation winding assembly 12 In FIG. 2 is drawn to the upper yoke 11 according to the invention, a compensation winding assembly 12.
  • the compensation winding assembly 12 consists of a single conductor loop or multiple conductor turns. It is wrapped around the upper yoke 11 around. The looping takes place so that the wiring again in the gap 7, the lower portion of the upper yoke 11 and then in the gap 9 extends upward.
  • the two ends of the conductor loop 12 open into connection contacts. From these connection contacts again leads a connecting line to a current control device 120, which is provided for feeding a compensation current.
  • FIG. 3 shows a third embodiment of the invention using the example of an electrical transformer 3 in 3-leg core design.
  • the 3-leg core consists of three winding-carrying legs 10 and a connecting yoke 11. Again, the laminated core of the yoke 11 is pressed together on both sides with yoke press plates 6, 8.
  • the two yoke-pressing plates 6 and 8 are each arranged laterally at a distance 7 or 9 to the yoke 11.
  • the compensation winding arrangement 12 here consists of two conductor loops 12 ', 12 ".
  • the left of the two conductor loops 12 ' is arranged on an upper yoke section 11, which connects the left leg 10 and the middle leg 10; in the FIG.
  • the right-hand conductor loop 12 is arranged on an upper yoke section 11, which connects the middle leg 10 and the right leg 10.
  • the cable routing takes place as shown in FIG. 3 from the top arranged connection contacts looking into the gap 9 between front yoke-pressing plate 8 and yoke 11, then wraps around the lower part of the yoke 11 and leads in the gap 7 between the back yoke-pressing plate 6 and yoke 11 back up to terminal contacts.
  • the connection contacts of each conductor loop 12 ', 12 are each again connected to a current control device 120', 120".
  • Compensating winding 12 ', 12 By everyone Compensating winding 12 ', 12 "each a separate associated power control device 120' or 120" is driven, it is possible to differentiated act on a compensated for direct-current component in the left and right leg 10.
  • Each current controller 120 ', 120 "operates autonomously, and by these two separate current controllers 120', 120", the compensation of a DC component in each leg 10 is possible individually and independently.
  • FIG. 4 shows a fourth embodiment of the invention. Shown again is the upper portion of the magnetic core of a transformer, illustrated by the example of the construction of a 4-leg core transformer 4.
  • the two main legs 10 each carry a in the FIG. 4 not shown winding package.
  • the magnetic return via yoke legs takes place.
  • the compression of the layered yoke laminations of the yoke 11 takes place by means of two yoke-pressing plates 6, 8.
  • Compensation winding assembly 12 is comprised of a first compensation winding 12 'and a second compensation winding 12 ".
  • Each of these compensation windings 12', 12" is disposed on upper yoke 11 at the head of a leg 10, respectively. Similar to the in FIG. 1
  • Each of these windings 12 ', 12 " consists of two conductor loops 13 and 15, which continue along the yoke 11 - in the present example in stepped linear conductor sections. or 9. These stepped linear conductor sections of a winding 12 'or 12 "again lead to each other.
  • FIG. 5 shows a fifth embodiment of the invention with reference to a transformer in so-called 5-leg core design.
  • This 5-leg core 5 consists of three main legs each carrying a winding arrangement 10 and two outer yoke legs. A yoke 11 again connects these three legs 10 and the two return legs.
  • the compensating winding assembly 12 in this embodiment consists of three separate windings 12 ', 12 "and 12"' , which are again arranged on the upper yoke 11 and fed by three separate power sources 120 ', 120 "and 120'". Again, the separate specification of the compensation current in each of the windings 12 ', 12 "and 12''' allows a differentiated influence in the compensation of an unwanted DC component ⁇ DC in the three legs 10th
  • the boiler passage for the connection line connecting the compensation winding to the current control means disposed outside the boiler is placed on the low-voltage side of the transformer for space.
  • FIG. 6 shows this embodiment of the compensation winding assembly 12 in the region of the connection between the upper yoke 11 and leg 20.
  • ⁇ DC flow In the leg 20 is an undesirable DC flow ⁇ DC flow.
  • This magnetic constant flux ⁇ DC is superimposed on the alternating flux, so that the magnetic material in the two half-waves is controlled differently. It leads to increased losses and increases the noise emission.
  • the compensation winding arrangement 12 serves for the purpose of compensating for this magnetic direct current ⁇ DC .
  • the conductor loop 13 consists essentially of two open conductor loops 13, 15, the curved loop around the yoke and continue in pairs with conductor sections 17 and 18 in the direction of the yoke. With their curvature, the conductor loops 13, 15 each span a surface which extends approximately orthogonally to the direction of the magnetic flux in the yoke 11. As in FIG. 6 1, the first conductor loop 13 is looped around a yoke section 21 on the left of the leg 20, the second conductor loop 15 around a yoke section 22 on the right of the leg 20. After looping, the conductor loop 13 is connected to the line pair 17 and the conductor loop 15 with the pair of wires 17 in the direction of the yoke, with the ends of the sections 17 and 18 facing each other.
  • the two rear conductor sections 17 and 18 are connected to one another at a connection point 23.
  • the two front conductor sections 17 and 18 terminate in two connection contacts K1 and K2.
  • this terminal contacts K1, K2 the feed of a compensation current I K occurs .
  • this compensation current I K flows in via the terminal K1 and out of the compensation winding arrangement 12 via the terminal K2.
  • the magnetic field strength concatenated with the current flow in the conductor loop 15 has a direction according to arrow 16 (seen in the current direction) Right screw), which in the conductor loop 13 in accordance with arrow 14.
  • a magnetic compensation flux ⁇ DC * from.
  • This magnetic compensation flux ⁇ DC * is in FIG.
  • a compensation winding 12, 12 ', 12' ', 12' '' each consist of one or more windings.
  • the number of turns depends on the voltage class of the transformer, since the compensation control means 120 'or 120 "or 120' '' induced in a compensation winding 12 'or 12' 'or 12' '' In a practical example, at 300V induced voltage, the compensating winding assembly 12 consists of two turns.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Transformers For Measuring Instruments (AREA)
EP15157688.1A 2015-03-05 2015-03-05 Transformateur Active EP3065150B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP15157688.1A EP3065150B1 (fr) 2015-03-05 2015-03-05 Transformateur
EP16703763.9A EP3224844B1 (fr) 2015-03-05 2016-02-08 Transformateur et procédé de rééquipement d'un transformateur
CN201680013885.6A CN107430927B (zh) 2015-03-05 2016-02-08 变压器以及用于改装变压器的方法
US15/554,952 US10559420B2 (en) 2015-03-05 2016-02-08 Transformer and method for retrofitting a transformer
CA2977716A CA2977716C (fr) 2015-03-05 2016-02-08 Transformateur et methode de remise en etat du transformateur
PCT/EP2016/052626 WO2016139030A1 (fr) 2015-03-05 2016-02-08 Transformateur et procédé de post-équipement d'un transformateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15157688.1A EP3065150B1 (fr) 2015-03-05 2015-03-05 Transformateur

Publications (2)

Publication Number Publication Date
EP3065150A1 true EP3065150A1 (fr) 2016-09-07
EP3065150B1 EP3065150B1 (fr) 2017-11-29

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EP15157688.1A Active EP3065150B1 (fr) 2015-03-05 2015-03-05 Transformateur
EP16703763.9A Active EP3224844B1 (fr) 2015-03-05 2016-02-08 Transformateur et procédé de rééquipement d'un transformateur

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EP16703763.9A Active EP3224844B1 (fr) 2015-03-05 2016-02-08 Transformateur et procédé de rééquipement d'un transformateur

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US (1) US10559420B2 (fr)
EP (2) EP3065150B1 (fr)
CN (1) CN107430927B (fr)
CA (1) CA2977716C (fr)
WO (1) WO2016139030A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3839992A1 (fr) * 2019-12-19 2021-06-23 Siemens Aktiengesellschaft Moyen de traction à culasse en tant qu'enroulement auxiliaire dans un transformateur ou une bobine d'inductance

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019023794A1 (fr) * 2017-08-01 2019-02-07 Hyperion Sensors Inc. Procédés et systèmes de détection optique pour transformateurs et leur construction
EP3576106B1 (fr) * 2018-05-30 2021-03-03 ABB Power Grids Switzerland AG Câble à conducteurs continuellement transposés comportant un dispositif de détection intégré

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4021860C2 (de) 1990-07-09 1996-08-22 Siemens Ag Schaltungsanordnung und Verfahren zur Minderung eines Geräusches bei einem Transformator
WO2008151661A1 (fr) * 2007-06-12 2008-12-18 Siemens Transformers Austria Gmbh & Co Kg Transformateur électrique avec compensation du flux continu
WO2011127969A1 (fr) 2010-04-14 2011-10-20 Siemens Transformers Austria Gmbh & Co Kg Procédé et dispositif pour la détection d'une grandeur magnétique caractéristique dans un noyau
WO2012041368A1 (fr) 2010-09-29 2012-04-05 Siemens Transformers Austria Gmbh & Co Kg Dispositif et procédé pour réduire une composante de flux magnétique continu dans le noyau d'un transformateur
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE525698C2 (sv) * 2003-06-27 2005-04-05 Forskarpatent I Syd Ab Transformator med skydd mot likströmsmagnetisering förorsakad av nollföljdsström
CN101309011A (zh) * 2008-07-16 2008-11-19 山东新科特电气有限公司 磁控调压式无功自动补偿方法及装置
EP3021335B1 (fr) * 2014-11-11 2018-12-26 Siemens Aktiengesellschaft Système et procédé de réduction d'une part de flux continu magnétique dans le noyau d'un transformateur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4021860C2 (de) 1990-07-09 1996-08-22 Siemens Ag Schaltungsanordnung und Verfahren zur Minderung eines Geräusches bei einem Transformator
WO2008151661A1 (fr) * 2007-06-12 2008-12-18 Siemens Transformers Austria Gmbh & Co Kg Transformateur électrique avec compensation du flux continu
WO2011127969A1 (fr) 2010-04-14 2011-10-20 Siemens Transformers Austria Gmbh & Co Kg Procédé et dispositif pour la détection d'une grandeur magnétique caractéristique dans un noyau
WO2012041368A1 (fr) 2010-09-29 2012-04-05 Siemens Transformers Austria Gmbh & Co Kg Dispositif et procédé pour réduire une composante de flux magnétique continu dans le noyau d'un transformateur
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3839992A1 (fr) * 2019-12-19 2021-06-23 Siemens Aktiengesellschaft Moyen de traction à culasse en tant qu'enroulement auxiliaire dans un transformateur ou une bobine d'inductance

Also Published As

Publication number Publication date
CN107430927B (zh) 2020-09-04
EP3224844B1 (fr) 2019-11-06
CA2977716A1 (fr) 2016-09-09
US10559420B2 (en) 2020-02-11
WO2016139030A1 (fr) 2016-09-09
CA2977716C (fr) 2020-01-07
CN107430927A (zh) 2017-12-01
US20180033545A1 (en) 2018-02-01
EP3065150B1 (fr) 2017-11-29
EP3224844A1 (fr) 2017-10-04

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