EP1052659B1 - Mittel- oder Niedrigspannungstrockentransformator mit linear verteiltem elektrischem Feld zur Verteilung von elektrischer Energie für ländliche Netzwerke - Google Patents

Mittel- oder Niedrigspannungstrockentransformator mit linear verteiltem elektrischem Feld zur Verteilung von elektrischer Energie für ländliche Netzwerke Download PDF

Info

Publication number
EP1052659B1
EP1052659B1 EP00401081A EP00401081A EP1052659B1 EP 1052659 B1 EP1052659 B1 EP 1052659B1 EP 00401081 A EP00401081 A EP 00401081A EP 00401081 A EP00401081 A EP 00401081A EP 1052659 B1 EP1052659 B1 EP 1052659B1
Authority
EP
European Patent Office
Prior art keywords
winding
transformer
distribution
cylinder
layer
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 - Lifetime
Application number
EP00401081A
Other languages
English (en)
French (fr)
Other versions
EP1052659A1 (de
Inventor
Philippe Trifigny
Jean-Francis Faltermeier
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.)
Societe Nouvelle Transfix Toulon SA
Original Assignee
Societe Nouvelle Transfix Toulon SA
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 Societe Nouvelle Transfix Toulon SA filed Critical Societe Nouvelle Transfix Toulon SA
Publication of EP1052659A1 publication Critical patent/EP1052659A1/de
Application granted granted Critical
Publication of EP1052659B1 publication Critical patent/EP1052659B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • 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
    • H01F27/288—Shielding

Definitions

  • the present invention relates to a single phase or polyphase electrically insulated MV / LV transformer with dry insulation for indoor or outdoor installation for the distribution of electrical energy.
  • dry isolation transformers allow the operator to overcome the constraints related to the protection of the environment and imposed by the presence of a dielectric liquid such as a mineral oil which, although generally not particularly toxic, nevertheless implies a means of retention in the event of a leak to prevent any accidental spreading which could pollute the runoff water, the water table, etc.
  • this retention means is difficult to envisage for a transformer intended for an outdoor installation, as is the case for distribution transformers installed at the top of the pole for example.
  • Dry-insulated MV / LV transformers are widely used in the distribution of electrical energy. Nevertheless, the technologies generally used, on the one hand, do not make it possible to produce devices at comparable costs to those of liquid dielectric transformers, in particular in powers of less than or equal to 250 kVA, and, on the other hand, do not allow a outdoor installation. As a result, the user of a dry type transformer is forced to place the device in a weather protection envelope, which increases the cost of the installation.
  • known dry insulated MV / LV transformers generally include encapsulation of the MV winding with a thermosetting resin, such as an epoxy resin.
  • a thermosetting resin such as an epoxy resin.
  • Other solutions may also be considered: the FR-A-2,637,729 (No. 88 13 180, patent TRANSFIX) has one of them, particularly suitable for the realization of power transformers used indoors.
  • the electric field is not directed, which on the one hand, leads to relatively large dielectric distances, and on the other hand, is incompatible with external and polluted environments.
  • the object of the invention is to overcome the disadvantages of the cited prior art by means of a dry isolation transformer of simple design and low cost.
  • the transformer according to the invention is characterized in that it comprises for each of its phases an insulating cylinder located between the winding BT and the winding MT, and in that this cylinder is coated on its inner surface with a conductive or semiconductor layer brought to the potential of the earth, and on its outer surface of a layer of RLT linear voltage distribution conductor material, on which is wound locally the MV winding.
  • the MV winding of the transformer according to the invention has a wafer structure of small width, consisting of a superposition of layers of turns, and connected in series, so that the distribution of the potential in said winding is of type axial.
  • the figure 1 represents a three-phase dry-insulated MV / LV electric transformer for indoor or outdoor installation for the distribution of electrical energy.
  • a winding BT 2 around a magnetic circuit 1, is placed a winding BT 2 and, positioned concentrically to this winding 2, an insulating cylinder 3 having on its surface a conductive or semiconducting layer 4 connected to the earth potential, and on its outer surface, a layer of semiconductor material designated RLT, the function of which is to ensure a linear distribution of the voltage over the entire length. of the insulating cylinder.
  • An MT winding 6 is positioned directly on the layer of material RLT and covers the central portion. This winding has the particularity of being realized so that the evolution of the potential between the various turns that constitute it is done in a preferred way in the axial direction.
  • the insulating cylinder 3 is made of a material with high dielectric characteristics and obtained by molding, extrusion or any other method making it possible to obtain a cylinder that is free of vacuoles and perfectly homogeneous.
  • This material may be a thermoplastic material, such as polyethylene used in the manufacture of high voltage cables, or an elastomer, silicone or EPDM for example.
  • the conductive or semi-conductive layer 4 can be obtained by spraying a synthetic material loaded with a metal powder onto the inside diameter of the insulating tube 3.
  • the semiconductor materials whose permittivity and resistivity vary according to the field Electrical are known and used in electrical engineering for the realization of high voltage cable accessories, and more particularly in the manufacture of retractable ends that equip these cables.
  • linear voltage divider (RLT) materials generally consist of one or more oxides, such as silicon carbide, mixed with a resin or putty.
  • the layer 5 of material RLT can be obtained by the winding of a sheet, the winding of a ribbon, or the shrinkage of a pre-molded tube on the outside diameter of the insulating cylinder 3.
  • the winding MT 6 consists of wafers 7 of small width, interconnected in series. Each of these slabs consists of superimposed layers of turns 9, made from a wire of conductive material 8 of circular section coated with an insulating varnish.
  • the winding MT is obtained using a ribbon 10 of bare conductive material of rectangular section, the material used being chosen for its ductility.
  • This conductive strip 10 is wound on the field and associated with an insulating film 11 of small thickness.
  • the shape of the electric field resulting from this design mode corresponds to the case of a three-phase transformer whose MT windings 6 are coupled in a triangle, as is presented on the figure 3 .
  • the radial electric field situated between the winding MT 6 and the winding BT 2 is completely contained in the insulating cylinder 3, between the layer 4 connected to the earth potential and the RLT layer 5.
  • the axial field is distributed on the one hand over the entire axial length of the winding MT 6, and secondly at the ends of the insulating cylinder 3 not covered by the winding MT 6, but nevertheless covered with the layer 5 of material RLT .
  • the field electrical radiating in the air is distributed homogeneously and remains small enough to exclude any risk of partial discharges or bypassing by an electric arc.
  • the transformer is entirely coated with a layer 12 of synthetic material having good resistance to ultraviolet radiation, electrical pathways, and transverse electrical constraints that could lead to perforation of said coating.
  • a layer 12 of synthetic material having good resistance to ultraviolet radiation, electrical pathways, and transverse electrical constraints that could lead to perforation of said coating.
  • This can be obtained for example by dipping the transformer in a bath, or by spraying with a pneumatic gun, a synthetic material having the desired characteristics. In this way is also provided the protection against corrosion of the mechanical parts and the filling of existing gaps between the different parts of the device.
  • the figure 4 presents the transformer described in figure 1 and provided with its coating 12.
  • the figure 5 presents a variant whose interest is to lengthen the tracking distance in the areas where the electric field radiating in the air is the most dense, and which correspond to the ends of the insulating cylinder not covered by the winding MT.
  • rings 13 of insulating material are evenly distributed on the insulating cylinder (13).
  • the coating 12 applied to the entire transformer tightens the contact area between the rings 13 and the layer 5 of material RLT and thus performs skirts identical to those that would comprise an electrical insulator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Organic Insulating Materials (AREA)

Claims (5)

  1. Ein- oder mehrphasiger elektrischer Mittelspannungs-/Niederspannungstransformator mit Trockenisolierung, der für eine Installation im Innen- oder Aussenbereich bestimmt ist, dadurch gekennzeichnet, dass er für jede seiner Phasen einen Isolierzylinder (3) enthält, der zwischen der Niederspannungswicklung (2) und der Mittelspannungswicklung (6) liegt, und dass dieser Zylinder (3) an seiner Innenfläche mit einer leitenden bzw. halbleitenden Schicht (4) beschichtet ist, die an das Erdpotential angelegt ist, sowie an seiner Aussenfläche mit einer Schicht aus halbleitendem Material als linearer Spannungsverteiler (5), auf welche die Mittelspannungswicklung (2) lokal aufgewickelt ist.
  2. Transformator nach Anspruch 1, dadurch gekennzeichnet, dass die Mittelspannungswicklung (6) einen Aufbau in Form von Scheiben geringer Breite hat, die aus einer Übereinanderordnung von Windungsschichten (9) bestehen und in Reihe so verbunden sind, dass die Verteilung des Potentials in der Wicklung (6) von axialer Art ist.
  3. Transformator nach Anspruch 1, dadurch gekennzeichnet, dass die Mittelspannungswicklung (6) aus der Feldspule eines Leiterbandes (10) in Verbindung mit einer Isoliermaterialfolie (11) besteht, so dass die Verteilung des Potentials in der Wicklung von axialer Art ist.
  4. Transformator nach Anspruch 1, dadurch gekennzeichnet, dass er eine einheitliche Beschichtung (12) enthält, die aus einer Schicht aus synthetischem Material mit für eine Verwendung im Aussenbereich adäquaten elektrischen und physikalischen Eigenschaften besteht, wobei diese Beschichtung (12) durch Tauchbeschichtung oder Anspritzen erhalten werden kann.
  5. Transformator nach Anspruch 4, dadurch gekennzeichnet, dass er beiderseits der Mittelspannungswicklung Ringe (13) aus Isoliermaterial enthält, welche Mäntel bilden, die dazu bestimmt sind, die Stromleitungsabstände zwischen der Mittelspannungswicklung (6) und den mit dem Massepotential des Transformators verbundenen Teilen zu verlängern, wobei die Mäntel sich an dem Isolierzylinder (3) befinden, der mit der Schicht aus halbleitendem Material als linearer Spannungsverteiler beschichtet ist, und mit der lsolierbeschichtung (12) überdeckt sind, die auf den gesamten Transformator aufgebracht ist.
EP00401081A 1999-05-10 2000-04-18 Mittel- oder Niedrigspannungstrockentransformator mit linear verteiltem elektrischem Feld zur Verteilung von elektrischer Energie für ländliche Netzwerke Expired - Lifetime EP1052659B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9905938A FR2793599B1 (fr) 1999-05-10 1999-05-10 Transformateur mt/bt a isolement sec, a champ electrique lineairement reparti, pour la distribution de l'energie electrique en milieu rural
FR9905938 1999-05-10

Publications (2)

Publication Number Publication Date
EP1052659A1 EP1052659A1 (de) 2000-11-15
EP1052659B1 true EP1052659B1 (de) 2008-08-13

Family

ID=9545413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00401081A Expired - Lifetime EP1052659B1 (de) 1999-05-10 2000-04-18 Mittel- oder Niedrigspannungstrockentransformator mit linear verteiltem elektrischem Feld zur Verteilung von elektrischer Energie für ländliche Netzwerke

Country Status (5)

Country Link
EP (1) EP1052659B1 (de)
AT (1) ATE404984T1 (de)
DE (1) DE60039813D1 (de)
ES (1) ES2312326T3 (de)
FR (1) FR2793599B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007006005B3 (de) * 2007-02-07 2008-07-31 Volker Werner Hanser Transformator
CN108987038B (zh) * 2017-05-31 2021-11-26 台达电子工业股份有限公司 磁性组件

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2150214A1 (de) * 1971-10-08 1973-04-12 Transformatoren Union Ag Mit einem schild versehene wicklung fuer transformatoren
US4518941A (en) * 1983-11-16 1985-05-21 Nihon Kohden Corporation Pulse transformer for switching power supplies
CZ386898A3 (cs) * 1996-05-29 1999-02-17 Abb Ab Elektromagnetické zařízení

Also Published As

Publication number Publication date
ES2312326T3 (es) 2009-03-01
DE60039813D1 (de) 2008-09-25
FR2793599A1 (fr) 2000-11-17
ATE404984T1 (de) 2008-08-15
FR2793599B1 (fr) 2001-07-06
EP1052659A1 (de) 2000-11-15

Similar Documents

Publication Publication Date Title
EP1816656B1 (de) Korrosionsgeschütztes elektrisches Kabel
KR20150099373A (ko) Dc용 케이블의 종단접속함
EP1052659B1 (de) Mittel- oder Niedrigspannungstrockentransformator mit linear verteiltem elektrischem Feld zur Verteilung von elektrischer Energie für ländliche Netzwerke
EP0923785B1 (de) Hochspannungs-/niederspannungstransformator mit thermoplastischer trockenisolation
EP0860835A1 (de) Lackierter Draht mit hoher Teilentladungsfestigkeit
KR20010032415A (ko) 절연 전기 도전체 및 접점방법
EP0248717B1 (de) Elektromagnetische Spule und Zündvorrichtung für Verbrennungsmotor mit einer solchen Spule
FR2518837A1 (fr) Procede de preparation d'extremites de cables electriques a champ radial haute tension et cables electriques ainsi obtenus
FR2691591A1 (fr) Limiteur de courant hybride supraconducteur pour réseau alternatif haute tension.
CA2285806A1 (fr) Transformateur sec de puisssance ou de distribution de l'energie electrique
WO2000074211A1 (en) A power cable
EP0115322B1 (de) Ein Ende eines elektrischen Mittelspannungskabels abdeckende gegossene Vorrichtung
KR20010049161A (ko) 고정 부분을 가진 전기 장치의 권선
Egiziano et al. Electrical properties of different composite materials for stress relief in HV cable accessories
JP4827131B2 (ja) モールド変圧器
JP2001189113A (ja) バイポーラ統合同軸ケーブル
EP1016165B1 (de) Strahlendes kabel
FR2735898A1 (fr) Procede de fabrication d'un isolateur en materiau composite
EP0494807B1 (de) Anschlussklemme für Hochspannung
JP3813315B2 (ja) 電力ケーブル外部半導電層縁切り方法および該電力ケーブルのシース縁切り部
KR20090023239A (ko) 전기 전도성 와이어 및 그 제조방법
FR2852746A1 (fr) Systeme de transmission d'energie a haute tension
JP2001345224A (ja) 変圧器またはリアクトル
RU1786510C (ru) Неизолированный провод дл воздушных линий электропередач
FR2461385A2 (fr) Dispositif de protection d'arret d'ecran pour cable electrique

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010417

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REF Corresponds to:

Ref document number: 60039813

Country of ref document: DE

Date of ref document: 20080925

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080813

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080813

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080813

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2312326

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080813

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080813

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090113

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20090514

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20090508

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090420

Year of fee payment: 10

Ref country code: IT

Payment date: 20090421

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20090417

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090415

Year of fee payment: 10

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090430

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090430

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081114

BERE Be: lapsed

Owner name: SOC. NOUVELLE TRANSFIX TOULON

Effective date: 20100430

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100418

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100430

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090418

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20110714

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110704

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080813

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100419

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

Owner name: TRANSFIX, FR

Effective date: 20131129

Ref country code: FR

Ref legal event code: CA

Effective date: 20131129

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20180323

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190430