EP1973126B1 - Bobine de tension primaire ajustable pour transformateur sec et transformateur HT/BT la comprenant - Google Patents

Bobine de tension primaire ajustable pour transformateur sec et transformateur HT/BT la comprenant Download PDF

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Publication number
EP1973126B1
EP1973126B1 EP08354010A EP08354010A EP1973126B1 EP 1973126 B1 EP1973126 B1 EP 1973126B1 EP 08354010 A EP08354010 A EP 08354010A EP 08354010 A EP08354010 A EP 08354010A EP 1973126 B1 EP1973126 B1 EP 1973126B1
Authority
EP
European Patent Office
Prior art keywords
power
coil
output
pancake
input
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
EP08354010A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1973126A1 (fr
Inventor
Bernard Ginevra
Jean Megias
Jean-Pierre Meley
Philippe Pulfer
Jean-Michel Carrante
Franck Fausto
Fréderic Walter
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP1973126A1 publication Critical patent/EP1973126A1/fr
Application granted granted Critical
Publication of EP1973126B1 publication Critical patent/EP1973126B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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
    • H01F29/025—Constructional details of transformers or reactors with tapping on coil 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2871—Pancake coils
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • H01F2027/328—Dry-type transformer with encapsulated foil winding, e.g. windings coaxially arranged on core legs with spacers for cooling and with three phases
    • 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
    • H01F27/2828—Construction of conductive connections, of leads
    • 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
    • H01F27/2847—Sheets; Strips
    • H01F27/2852—Construction of conductive connections, of leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers

Definitions

  • the invention generally relates to the realization of power transformers for the distribution of electrical energy, single phase or multiphase, of the coated or immersed type, in which the primary or secondary voltage can be modulated.
  • the invention relates to a high-voltage coil, often external, for an active part of a transformer, made in the form of stacked wafers whose relative orientation makes it possible to modify the input voltage, as well as pancakes adapted for this purpose.
  • the invention also relates to transformer modules and the unit cells of these modules, formed with a variable number of wafers.
  • the grid voltage is usually lowered from the "high voltage” level (between 5 and 52 kV) to a “low voltage” level (less than 1000 V); high voltage / low voltage transformers (HV / LV) allow this modification, at the cost of significant heat exchange.
  • HV / LV high voltage / low voltage transformers
  • these transformers use mineral oils as insulating and heat transfer fluid.
  • coated or solid-insulated transformers In particular in order to preserve the environment and to avoid the risk of fire, so-called coated or solid-insulated transformers have been developed in which the concentric primary and secondary windings are each embedded in dielectric molding resin. In addition to electrical insulation, the resin also exchanges heat with the air to cool the transformer.
  • the coated power transformers can also be shielded, in particular at the external HV coil, to increase their isolation from the environment.
  • An exemplary embodiment is given in the document WO 98/10446 .
  • the process of producing the coils is however heavy, and this type of coated transformer remains expensive.
  • the windings are usually manufactured to order from a specification of the customer, particularly depending on the voltages he wishes to treat and the power envisaged.
  • the invention aims to overcome the disadvantages of existing transformers by rationalizing the range of windings, in particular by producing coils that can be adapted to different power transformers and / or primary voltage.
  • the invention relates to a high-voltage coil (Claim 5) made by superimposing power wafers comprising a plurality of outputs (Claim 1).
  • a high-voltage coil (Claim 5) made by superimposing power wafers comprising a plurality of outputs (Claim 1).
  • the number of slabs it is possible to adjust the power.
  • the invention relates to a power wafer embedded in an insulating resin and having an input and a plurality of accessible outputs, preferably two, of the winding of turns.
  • the angular distribution of the terminals relating to the inputs / outputs is regular.
  • the inlets / outlets are accessible from each face of the wafer thanks to the presence of resin side overmoldings in which a connection device allows the insertion of a connector cooperating with another wafer.
  • a preferred example concerns two outputs, for example at 6 and 7 kV, and an equidistant 120 ° input opening into three protuberances.
  • the invention in another aspect, relates to a coil composed of a plurality of superimposed power wafers connected together in series and / or in parallel, one of at least one, preferably all, of the power wafers comprising a plurality of different voltage outputs.
  • all the power wafers are identical, and in particular comprise a protrusion for each input and output terminal in which a connector can be inserted to directly connect them; plugs may be placed in the non-electrically connected protuberances.
  • the adjustment of the primary voltage is then achieved by the choice of the connection (series or parallel) and the relative orientation of the power wafers.
  • a high voltage transformer coil HT / LV according to the invention comprises several power wafers with several superimposed outputs, associated with two end wafers, each end wafer comprising an external connection terminal .
  • the power wafers are thus simplified and standardized as much as possible, and it is possible, by the end wafers, to adapt to the external connections of the customer and / or to the desired modularity of the transformers.
  • the end wafers may be identical in design, or one of them may be provided with means for connection with the terminal of the other end wafer. At least one of the end slabs is adapted to be connected with another slab (for example the end slab of another spool according to the invention), and / or for the customer connection.
  • a HV coil according to the invention may be associated with a LV coil in order to produce an active transformer part.
  • Three active parts can be associated with a magnetic circuit so as to produce a three-phase transformation module.
  • the figure 1 schematically illustrates the realization of a three-phase transformation module which can be manufactured with wafers according to the invention.
  • the figure 2 represents a power wafer according to a preferred embodiment of the invention as well as the associated connectivity.
  • FIGS. 3A and 3B show obtaining coils of two different primary voltages with the same wafers according to the invention.
  • FIGS. 4A and 4B represent preferred embodiments of end wafers that can be associated with a coil according to the invention.
  • the invention will be described in relation to a stack of four identical power wafers comprising outputs, in particular at 6 and 7 kV, spaced by 120 ° with a 0 V input of the winding.
  • This embodiment is particularly advantageous because, while not excessively complicating the manufacture and maintenance, it makes it possible to cover the majority of the desired applications (in particular the transformers of 6, 7, 12, 14, 18, 21, 24.28 kV).
  • this illustrative example can be adapted to the application and that, in particular, other choices of output voltages are possible, that a different number of wafers can be stacked, each of which can include more outputs if desired, such as three outputs spaced 90 °, ...
  • a transformer 1 comprises three cells 2 of identical characteristics which are secured by yokes.
  • Each cell 2 comprises, concentrically, a core 4 of magnetic circuit, which is preferably made from several sheets of magnetic sheet and an active part; each active part is composed of a coil BT 6, coated or impregnated with insulating resin, around which is placed a coil HT 8, also coated
  • the HT coil 8 is composed of several superimposed power wafers 10; in particular, the power wafers 10 are preferably identical to reduce the number of industrial references.
  • a wafer HT 10 consists of a winding of several conductive turns and an insulation system, for example a coating resin and / or impregnation; shielding can also be provided.
  • At least one wafer 10, illustrated in FIG. figure 2 has an input and several outputs corresponding to a different number of turns, and therefore to different voltage steps, that is to say that the set of turns extends between a first conductor end corresponding to an input and a second conductor end corresponding to an output, and further comprising at least one conductive port between the ends corresponding to an additional output.
  • a connector system makes it possible to connect the inputs and the outputs of the power wafers 10 in series or in parallel so that the resulting coil 8 responds to several primary voltages.
  • connection cable may connect output similar to those present in the winding described in WO 98/10446 .
  • protuberances 12 are made, for example by overmolding the insulation resin 14, to open the inlet and outlet conductors of the wafers 10.
  • the protuberances 12 comprise, at each end, an orifice 16, provided for example with a ring 18 which is connected to the input and output conductive ports of the coil winding; each orifice 16 can receive a connection element 20 in order to make the electrical connection with an adjacent coil 10: thanks to this geometry, a connection of the coils is also ensured.
  • each power wafer 10 is in the form of a resin ring 14 in which is embedded the winding of turns, provided with three protuberances 12 0 , 12 1 , 12 2 to 120 ° respectively corresponding to the input (0 V) of the coil winding and two outputs of different voltage steps, in particular 6 and 7 kV.
  • the three protuberances 12 comprise an orifice 16 at each end in which can be inserted a connecting device 20 which can be conductive, such as a bicon 22, or insulating as a plug 24.
  • the power wafers 10 are stacked: according to the scheduling of the conductive connection devices 22 in the protuberances 12 i , different primary voltages are covered.
  • FIG 3A in order to obtain a primary voltage coil 24 kV, it is possible to use four power wafers 10 1 , 10 2 , 10 3 , 10 4 connected in series: bicones 22 are inserted between the input 12 0 and the output 12 1 at 6 kV of two adjacent pancakes.
  • a device 24 of the insulating plug type is placed between the protuberances 12 2 not used, in order to stabilize the assembly and to provide insulation.
  • each end plate 50 comprises protuberances 52 similar to those of the power wafers 10, provided with orifices, which advantageously only open on one side, in which connecting means such as the bicones 22 and the plugs 24 can be inserted; the orifices are also provided with a system for electrical conduction, for example of a similar nature to that of the power wafers 10 (rings 18, ).
  • the end wafers further comprise one or more input and / or output terminals 54 allowing the more "conventional" connection to external systems (connection cables, other wafer, etc.); the current supply terminals 54 may be lateral or localized on one face of the wafer 50. It is possible, according to the scheduling of the transformer modules, that the end wafers are then fixed orientation.
  • each protuberance 52 is electrically connected to a terminal 54, which serves as a feed into the top and outlet slab into the bottom slab.
  • the terminal can be doubled, preferably with two diametrically opposite input and output terminals, respectively.
  • an end wafer 50 ' preferably the wafer 50' upper, comprising both input terminals 54 'and 56' output, for example on its outer face, as described in the application patent FR 07 02011 entitled "Active part of a coated transformer with a connection system at one end and a modular HV / LV transformer including it ".
  • the two output terminals 56 ' are electrically connected to an access 58', for example lateral, which will be connected to the output terminal 54 of the lower wafer Previous 50; for example the access 58 'is positioned above the terminal 54 so as to use a connecting bar.
  • This option makes the connection area more accessible, which can be particularly advantageous if transformer modules are connected in parallel in order to realize a modular transformation bench.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Rolling Contact Bearings (AREA)
  • Insulating Of Coils (AREA)
EP08354010A 2007-03-20 2008-02-04 Bobine de tension primaire ajustable pour transformateur sec et transformateur HT/BT la comprenant Active EP1973126B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0702010A FR2914105B1 (fr) 2007-03-20 2007-03-20 Bobine de tension primaire ajustable pour transformateur sec et transformateur ht/bt la comprenant

Publications (2)

Publication Number Publication Date
EP1973126A1 EP1973126A1 (fr) 2008-09-24
EP1973126B1 true EP1973126B1 (fr) 2009-07-08

Family

ID=38434696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08354010A Active EP1973126B1 (fr) 2007-03-20 2008-02-04 Bobine de tension primaire ajustable pour transformateur sec et transformateur HT/BT la comprenant

Country Status (5)

Country Link
EP (1) EP1973126B1 (es)
AT (1) ATE436078T1 (es)
DE (1) DE602008000039D1 (es)
ES (1) ES2326846T3 (es)
FR (1) FR2914105B1 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2923954B1 (fr) * 2007-11-20 2010-02-26 Schneider Electric Ind Sas Connexion blindee de deux bornes par contact entre interfaces planes.
EP2189990B1 (de) * 2008-11-22 2011-11-16 ABB Technology AG Einphasen-Wicklungsmodul und Anordnung von Einphasen-Wicklungsmodulen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR702011A (fr) 1930-08-14 1931-03-27 Houtindustrie Picus Voorheen J Procédé de fabrication d'objets ou matériaux revêtus d'une résine artificielle à leur surface
FR1578613A (es) * 1968-08-30 1969-08-14
JPS593907A (ja) * 1982-06-29 1984-01-10 Hitachi Ltd モ−ルド変圧器
FR2637729B1 (fr) * 1988-10-07 1995-03-10 Transfix Soc Nouv Transformateur de distribution haute tension/basse tension a isolement sec et procede pour realiser un tel transformateur
FR2673484B1 (fr) * 1991-03-01 1993-06-04 Thomson Csf Dispositif d'alimentation haute tension, destine en particulier a un generateur de rayons x, procede de fabrication d'un transformateur haute tension et generateur de rayons x mettant en óoeuvre un tel transformateur.
US6445269B1 (en) * 1996-09-04 2002-09-03 E.I. Du Pont De Nemours And Company Dry-type high-voltage winding
FR2822587B1 (fr) * 2001-03-20 2003-05-16 France Transfo Sa Realisation d'enroulements "haute ou moyenne tension" de transformateurs immerges, et enroulements ainsi realises

Also Published As

Publication number Publication date
ES2326846T3 (es) 2009-10-20
FR2914105B1 (fr) 2009-04-24
ATE436078T1 (de) 2009-07-15
DE602008000039D1 (de) 2009-08-20
FR2914105A1 (fr) 2008-09-26
EP1973126A1 (fr) 2008-09-24

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