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WO2015088796A1 - Enroulement à dépôt radial pour transformateurs de type sec à moyenne tension à enroulement ouvert à structure de support améliorée - Google Patents

Enroulement à dépôt radial pour transformateurs de type sec à moyenne tension à enroulement ouvert à structure de support améliorée Download PDF

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Publication number
WO2015088796A1
WO2015088796A1 PCT/US2014/067852 US2014067852W WO2015088796A1 WO 2015088796 A1 WO2015088796 A1 WO 2015088796A1 US 2014067852 W US2014067852 W US 2014067852W WO 2015088796 A1 WO2015088796 A1 WO 2015088796A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
posts
spacer
guide
spacers
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.)
Ceased
Application number
PCT/US2014/067852
Other languages
English (en)
Inventor
Robert C. Ballard
Josiah Levi VANDERVELDE
William Edward PAULEY, Jr.
Joseph Leo TEDESCO
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.)
ABB Technology AG
Original Assignee
ABB Technology 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
Priority claimed from US14/101,440 external-priority patent/US9214273B2/en
Application filed by ABB Technology AG filed Critical ABB Technology AG
Publication of WO2015088796A1 publication Critical patent/WO2015088796A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/098—Mandrels; Formers

Definitions

  • the invention relates to dry type transformers and, more particularly, to a radial drop winding for open wound medium voltage dry type transformers.
  • Dry type transformer windings incorporate a conductor, typically of aluminum or copper, and solid insulation to prevent dielectric failure.
  • a conductor typically of aluminum or copper
  • solid insulation to prevent dielectric failure.
  • One of the metrics to determine material content is the fill factor or the amount of space inside a coil used for the conductor.
  • An object of the invention is to fulfill the need referred to above.
  • this objective is obtained by a method that provides a medium voltage radial drop winding for an open wound transformer.
  • the method provides a plurality of non-electrically conductive posts arranged to define an interior space.
  • Each post is of generally L-shape having a main body and a leg extending from a bottom end of the main body.
  • conductive wire is dropped to build up lengthwise along the posts to define at least one generally cylindrical winding segment supported by the legs of the posts.
  • a radial drop winding for an open wound transformer includes support structure having a plurality of non-electrically conductive posts.
  • Each post is of generally L-shape having a main body and a leg extending from a bottom end of the main body.
  • the posts are arranged so as to define an interior space.
  • At least one generally cylindrical winding segment including conductive wire is disposed about the posts and supported by the legs.
  • FIG. 1 is a perspective view of a post of support structure for a medium voltage radial drop winding in accordance with an embodiment of the invention.
  • FIG. 2 is a perspective view of a spacer of spacer structure of a medium voltage radial drop winding in accordance with an embodiment of the invention.
  • FIG. 3 is a perspective view of the spacer structure defined by the joining of the spacer of FIG. 2 with a spacer guide.
  • FIG. 4 is view of a barrier of a medium voltage radial drop winding that includes the support structure defined by the post of FIG. 1 and the spacer structure of FIG. 3.
  • FIG. 5 is a view of the barrier of FIG. 4, shown with the conductor wound about the posts.
  • FIG. 6 is a view of the barrier with conductor of FIG. 5, shown with a glass tape overlap.
  • FIG. 7 is a view showing directions of winding of the tape overlap of FIG. 5, with the dashed lined arrows showing overlap being wound prior to the solid line arrows, in accordance with an embodiment.
  • FIG. 8 is a view showing a direction of winding of the tape overlap of FIG. 5, in accordance with another embodiment.
  • a post 1 0 is shown to define a mechanical support structure 12 for windings as will be explained below.
  • the post 10 is elongated and generally L-shaped, having a main body 14 and a leg 16 at a bottom end 1 8 of the post 10.
  • the leg 16 extends generally transversely with respect to an axis A of the main body 14.
  • a slot 20 is defined in the leg 16, the function of which will be explained below.
  • a spacer structure is shown, generally indicated at 20.
  • the spacer structure 20 includes a spacer 22 having a body 24 with a first end 26 and an opposing second end 28.
  • a keyway or slot 30 is provided in the second end 28 so as to define first and second opposing legs 32 and 34, respectively.
  • Each leg 32, 34 includes a convex protrusion 36.
  • the spacer structure 20 also includes a spacer guide 38 having opposing sides 40 and 42, with each side including an elongated channel 44 defined therein.
  • each channel 44 is defined as a generally arc-shaped trough so as to define a "dog bone" structure.
  • a portion of the spacer guide 38 is received in the generally rectangular slot 30 of the spacer 22 with the protrusions 36 frictionally and slidably engaging the surfaces defining the channels 44 of the guide 38.
  • the spacer 22 is slidable along axis B of the guide 38.
  • the post 10 and spacer structure 20 are of non-electrically conductive material such as polyester glass.
  • each post 10 and guide 38 is arranged to extend from a periphery of an imaginary geometric shape such as a circle to define an interior space 46.
  • Other geometrical shapes can be used instead of circle, such as a rectangle, square, octagon, hexagon, oval, etc.
  • the separate posts 1 0 and guides 38 can be connected by tape or the like.
  • the posts 10 and guides 38 are spaced evenly around the periphery of the circle or, as shown in the embodiment of FIG. 4, they are spaced around a periphery of a conventional cylindrical HiLo barrier 48 having the interior space 46 that is provided for dielectrics and cooling. Voltage adjustment taps 52 are also shown in FIG. 4.
  • each guide 38 is provided between two posts 10.
  • a drop winding conductor or round wire 54 will fall and build up lengthwise along the posts 10 and guides 38 to control the radial and vertical build of the wire 54 while limiting the probability that a turn could drop down and cause a higher than designed dielectric stress from turn to turn.
  • the turns of conductor 54 will fall from the top to the bottom in a partially random fashion to fill the dedicated conductor space.
  • the wire 54 fills the slots 20 of the legs 16 and builds from the slots 20 upwardly to form a generally cylindrical winding supported by the legs 16.
  • the winding is optionally divided at least two more generally cylindrical segments 56 and 58 to allow for the voltage adjustment taps 52 supported off of a mechanical tap box (not shown).
  • the middle spacers 22 are slid onto the guides 38 into position at the desired location above the winding segment 56.
  • each spacer 22 extends outwardly from the associated guide 38.
  • the upper or second winding segment 58 is created by dropping more of the wire 54 along the posts 1 0 above the spacers 22.
  • the spacers 22 are disposed between the segments 56 and 58 and prevent electrical contact between the segments 56 and 58.
  • the middle spacers 22 are secured from vertical movement with respect to the guides 38 by the segments 56 and 58.
  • the middle spacers 22 can be in stacked, abutting relation to increase separation between the segments 56, 58.
  • top spacers 22' can be provided above segment 58 as well such that first winding segment 56 is disposed between the legs 16 of the post 1 0 and the middle spacers 22, and the second winding segment 58 is disposed between the middle spacers 22 and the top spacers 22' to prevent axial movement of the winding segments during manufacturing, shipping, installation, energization or fault conditions.
  • FIG. 6 also shows glass tape or weave overlap 60 wrapped on segments 58 and
  • FIG. 7 A first method of wrapping the segments 56, 58 is shown in FIG. 7, wherein the dashed lined arrows show overlap 60 being wound prior to the solid line arrows. The direction of wrap is shown by the arrows.
  • FIG. 8 shows another way to wrap the overlap 60.
  • the posts 10 and spacer structure 20 ensure that the winding segment(s) hold a predictable shape and survive the manufacturing, shipping, installation, and energization processes.
  • This drop winding concept can be applied to medium voltage dry type transformers that use a dipped or sprayed varnish coating process for environmental protection and enhanced mechanical performance. It can be used with aluminum or copper windings, paper/film wrapped conductors or film coated conductors at voltages presently up to 36kV and 2 MVA, although even higher distribution voltages and higher distribution MVAs are contemplated.
  • the medium voltage radial drop winding 62 for open wound/ventilated coils will reduce direct labor and increases the effective fill factor, while maintaining a nearly linear voltage distribution inside the winding.
  • the open wound or open ventilated coils do not use solid epoxy to fill the space between the coils or turns in the same winding.
  • the radial drop winding 62 solves the issue of how to apply radial drop windings on open wound transformers without relying the vacuum cast or resin encapsulated process.
  • medium voltage radial drop winding 62 includes the reduction of material content, does not require vacuum cast or resin encapsulated processes, reduces manufacturing time, enhances mechanical performance versus a typical open wound disk configuration, and reduces overall footprint and weight.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

L'invention concerne un procédé qui réalise un enroulement de chute radial pour un transformateur à enroulement ouvert. Une pluralité de perches (10) non électriquement conductrices sont agencées pour définir un espace intérieur. Chaque perche présente une forme générale en L comportant un corps principal (14) et une jambe (16) s'étendant depuis une extrémité inférieure du corps principal. Pendant un processus d'enroulement ouvert, du fil conducteur (54) est lâché pour s'accumuler dans le sens de la longueur le long des perches pour définir au moins un segment d'enroulement (56, 58) sensiblement cylindrique supporté par les jambes des perches.
PCT/US2014/067852 2013-12-10 2014-12-01 Enroulement à dépôt radial pour transformateurs de type sec à moyenne tension à enroulement ouvert à structure de support améliorée Ceased WO2015088796A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/101,440 US9214273B2 (en) 2013-06-11 2013-12-10 Radial drop winding for open-wound medium voltage dry type transformers with improved support structure
US14/101,440 2013-12-10

Publications (1)

Publication Number Publication Date
WO2015088796A1 true WO2015088796A1 (fr) 2015-06-18

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Family Applications (1)

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PCT/US2014/067852 Ceased WO2015088796A1 (fr) 2013-12-10 2014-12-01 Enroulement à dépôt radial pour transformateurs de type sec à moyenne tension à enroulement ouvert à structure de support améliorée

Country Status (1)

Country Link
WO (1) WO2015088796A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017208814A1 (de) 2017-05-24 2018-11-29 Isotek Gmbh Distanzband, Transformatorenwicklung und Transformator sowie das Verfahren zur Herstellung eines Distanzbandes
CN120432302A (zh) * 2025-07-09 2025-08-05 葫芦岛中电电力设备有限公司 油浸式电力变压器简易绕线模具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327267A (en) * 1965-05-17 1967-06-20 Westinghouse Electric Corp Potential transformer
CH567327A5 (fr) * 1973-12-19 1975-09-30 Bbc Brown Boveri & Cie
DE102005030014B3 (de) * 2005-06-17 2006-11-30 Ismet Ag Windungsseparierungselement zum Separieren von Windungen einer Spule, und zugehörige Spule, insbesondere Transformatorspule
US20070279177A1 (en) * 2006-05-30 2007-12-06 Sarver Charlie H Disc-wound transformer with foil conductor and method of manufacturing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327267A (en) * 1965-05-17 1967-06-20 Westinghouse Electric Corp Potential transformer
CH567327A5 (fr) * 1973-12-19 1975-09-30 Bbc Brown Boveri & Cie
DE102005030014B3 (de) * 2005-06-17 2006-11-30 Ismet Ag Windungsseparierungselement zum Separieren von Windungen einer Spule, und zugehörige Spule, insbesondere Transformatorspule
US20070279177A1 (en) * 2006-05-30 2007-12-06 Sarver Charlie H Disc-wound transformer with foil conductor and method of manufacturing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017208814A1 (de) 2017-05-24 2018-11-29 Isotek Gmbh Distanzband, Transformatorenwicklung und Transformator sowie das Verfahren zur Herstellung eines Distanzbandes
CN120432302A (zh) * 2025-07-09 2025-08-05 葫芦岛中电电力设备有限公司 油浸式电力变压器简易绕线模具
CN120432302B (zh) * 2025-07-09 2025-09-26 葫芦岛中电电力设备有限公司 油浸式电力变压器简易绕线模具

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