CN104752039A - Insulation structure of 132 kV duplex-winding on-load tap changing transformer - Google Patents

Insulation structure of 132 kV duplex-winding on-load tap changing transformer Download PDF

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Publication number
CN104752039A
CN104752039A CN201510173612.5A CN201510173612A CN104752039A CN 104752039 A CN104752039 A CN 104752039A CN 201510173612 A CN201510173612 A CN 201510173612A CN 104752039 A CN104752039 A CN 104752039A
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China
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coil
voltage
voltage regulation
insulation
winding
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CN201510173612.5A
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CN104752039B (en
Inventor
李静
张国运
赵徐
郑赞
张立明
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BAODING TIANWEI GROUP TEBIAN ELECTRIC Co Ltd
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BAODING TIANWEI GROUP TEBIAN ELECTRIC Co Ltd
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Abstract

The invention relates to an insulation structure of a 132 kV duplex-winding on-load tap changing transformer, and belongs to the technical field of manufacturing a transformer. The technical scheme is: a low-voltage coil (3) is a continuous and middle symmetrical structure and composed of a coil; a high-voltage coil (2) is two-paths parallel linked and inserted shield continuous type; a first end (6) of a high-voltage coil is an inserted shield type winding structure, and the other sections are continuous winding structure; fiber container oil clearance insulation structures (12) are arranged between the high-voltage coil (2) and the low-voltage coil (3), between the high-voltage coil (2) and a pressure regulating coil I and between the high-voltage coil (2) and a pressure regulating coil II; a voltage regulating coil static ring (10), a voltage regulating coil inside diameter side angle ring (16) and a voltage regulating coil reverse angle ring (14) are arranged among a tail end (7) of the voltage regulating coil I (7), a head end of the voltage regulating coil II and an end part coil (9) of the voltage regulating coil. The insulation structure of the 132 kV duplex-winding on-load tap changing transformer is positively effected on a large-capacity low-loss dual-winding on-load tap grading insulation transformer, and used for producing a high-end 132 kV voltage grade transformer; the insulation performance is reliable; and the insulation structure can meet market demand.

Description

A kind of 132kV double winding on-load tap-changing transformer insulation system
Technical field
The present invention relates to a kind of 132kV double winding on-load tap-changing transformer insulation system, belong to the manufacturing technology field of transformer.
Background technology
At present, China's electrical network does not have 132kV electric pressure, and therefore China does not have relative maturity reliable 132kV design of transformer manufacturing technology.International market was in great demand to 132kV level power transformer product in the last few years, and China's transformer industry is badly in need of the high-end 132kV electric pressure transformer of research and development.Particularly 132kV double winding on-load tap-changing transformer insulation system is 132kV design of transformer emphasis, and this structure is specially adapted to 132kV Large Copacity low-loss double winding on-load voltage regulation graded insulated transformer.
Summary of the invention
The object of the invention is to provide a kind of 132kV double winding on-load tap-changing transformer insulation system, is applicable to Large Copacity low-loss double winding on-load voltage regulation graded insulated transformer, and insulation property are reliable, solves background technology Problems existing.
Technical scheme of the present invention is: a kind of 132kV double winding on-load tap-changing transformer insulation system, comprises iron core, high-tension coil, low-voltage coil, voltage regulation coil I and voltage regulation coil II; High-tension coil, low-voltage coil, voltage regulation coil I and voltage regulation coil II are placed on three core limbs respectively; Low-voltage coil is a road continous way and intermediate symmetry structure, is made up of a coil; High-tension coil is that shielding continous way is inserted in two-way parallel connection, and high-tension coil head end is for inserting protected type winding structure, and other line segment is continous way winding structure; Between high-tension coil and low-voltage coil and high-tension coil and be paper web oil clearance insulation system between voltage regulation coil I and voltage regulation coil II; Structure between voltage regulation coil I tail end with voltage regulation coil end paper circle is identical with the structure between voltage regulation coil II head end and voltage regulation coil end paper circle, be equipped with voltage regulation coil electrostatic ring, voltage regulation coil internal side diameter square ring and voltage regulation coil dihedral ring, for improving impact characteristics and the Electric Field Distribution of voltage regulation coil end; Between the low-voltage coil and core limb of inner side, be provided with iron core column barricade, make the corner angle of core limb all be placed within the electric shield of iron core column barricade like this, the partial discharge quantity of device body reduces.
The coated electric insulation crimped paper of high-tension coil head end outlet, strengthens high-tension coil head end electrical insulation strength; Outermost layer adds the two square ring in the first head place of double-deck high-tension coil, and support with stay between voltage regulation coil internal side diameter square ring and high-tension coil head end, blank space crimped paper is filled, and extends the creepage distance between pressure regulation circle.
The top of described high-tension coil and low-voltage coil is fixed by pressing plate, secondary pressing plate and briquetting.
Good effect of the present invention is used for Large Copacity low-loss double winding on-load voltage regulation graded insulated transformer, produces high-end 132kV electric pressure transformer, and insulation property are reliable, meet market demand.
Accompanying drawing explanation
Fig. 1 is Facad structure cutaway view of the present invention;
In figure, 1 is core limb, 2 is high-tension coil, 3 is low-voltage coil, 4 be voltage regulation coil I, 5 be voltage regulation coil II, 6 for high-tension coil head end, 7 is voltage regulation coil I tail end, 8 is voltage regulation coil II head end, and 10 is voltage regulation coil electrostatic ring, and 11 is iron core column barricade, 12 is paper web oil clearance insulation system, the two square ring in the 13 first head places of high-tension coil, 14 is line ball circle dihedral ring, and 15 is voltage regulation coil outside diameter paper web, 16 is voltage regulation coil internal side diameter square ring, 17 is pressing plate, and 18 is secondary pressing plate, and 19 is that briquetting, 24 is for insulating part.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the invention will be further described.
A kind of 132kV double winding on-load tap-changing transformer insulation system, comprises iron core 1, high-tension coil 2, low-voltage coil 3, voltage regulation coil I4 and voltage regulation coil II5; High-tension coil 2, low-voltage coil 3, voltage regulation coil I4 and voltage regulation coil II5 are placed on three core limbs 1 respectively; Low-voltage coil 3 is a road continous way and intermediate symmetry structure, is made up of a coil; High-tension coil 2 is that shielding continous way is inserted in two-way parallel connection, and high-tension coil head end 6 is for inserting protected type winding structure, and other line segment is continous way winding structure; Between high-tension coil 2 and low-voltage coil 3 and high-tension coil 2 and be paper web oil clearance insulation system 12 between voltage regulation coil I and voltage regulation coil II; Structure between voltage regulation coil I tail end 7 with voltage regulation coil end paper circle is identical with the structure between voltage regulation coil II head end 8 and voltage regulation coil end paper circle, be equipped with voltage regulation coil electrostatic ring 10, voltage regulation coil internal side diameter square ring 16 and voltage regulation coil dihedral ring 14, for improving impact characteristics and the Electric Field Distribution of voltage regulation coil end; Be provided with iron core column barricade 11 between the low-voltage coil 3 of inner side and core limb 1 at core limb, make the corner angle of core limb all be placed within the electric shield of iron core column barricade like this, the partial discharge quantity of device body reduces.
The coated electric insulation crimped paper of high-tension coil head end 6 outlet, strengthens high-tension coil head end electrical insulation strength; Outermost layer adds the two square ring 13 in double-deck first head place of high-tension coil, and support with stay between voltage regulation coil internal side diameter square ring 16 and high-tension coil head end, blank space crimped paper is filled, and extends the creepage distance between pressure regulation circle.
The top of described high-tension coil 2 and low-voltage coil 3 is fixed by pressing plate 17, secondary pressing plate 18 and briquetting 19.
With reference to accompanying drawing, embodiment more specifically execution mode is as follows:
Low-voltage coil 3 is a road continous way and intermediate symmetry structure, is made up of a coil; High-tension coil 2 is that shielding continous way is inserted in two-way parallel connection, and high-tension coil head end 6 is for inserting protected type winding structure, and other line segment is continous way winding structure; Between high-tension coil 2 and low-voltage coil 3 and high-tension coil 2 and be paper web oil clearance insulation system 12 between voltage regulation coil I and voltage regulation coil II.Because high-tension coil 2 is 132kV insulation system, the voltage of its high-tension coil head end 6 is 132kV, and for reducing surge voltage bottom voltage gradient, high-tension coil head end 6 adopts and inserts protected type coiling, and other line segment adopts continous way coiling.
Voltage regulation coil I tail end 7 and be provided with voltage regulation coil electrostatic ring 10 between voltage regulation coil II head end 8 and voltage regulation coil end paper circle, can reduce electric field strength maximum between voltage regulation coil I4 and voltage regulation coil II5, uniform end Electric Field Distribution like this.Voltage regulation coil I tail end 7 is with being provided with voltage regulation coil internal side diameter square ring 16, voltage regulation coil dihedral ring 14 between voltage regulation coil II head end 8, also be provided with voltage regulation coil outside diameter paper web 15 and insulating part 24, ensure that voltage regulation coil I and the insulation distance between voltage regulation coil II and high-tension coil head end 6.The coated electric insulation crimped paper of high-tension coil head end 6 outlet, strengthens high-tension coil head end electrical insulation strength, and outermost layer adds high pressure the two square ring 13 in the first head place of coil; Support with stay between voltage regulation coil internal side diameter square ring 16 and high-tension coil head end, blank space crimped paper is filled, and extends the creepage distance between pressure regulation circle.
Be provided with iron core column barricade 11 between inner side low-voltage coil and core limb 1, make the corner angle of core limb all be placed within the electric shield of iron core column barricade like this, the partial discharge quantity of device body reduces.
The top of high-tension coil 2 and low-voltage coil 3 is fixed by pressing plate 17, secondary pressing plate 18 and briquetting 19.

Claims (3)

1. a 132kV double winding on-load tap-changing transformer insulation system, is characterized in that: comprise iron core (1), high-tension coil (2), low-voltage coil (3), voltage regulation coil I(4) and voltage regulation coil II(5); High-tension coil (2), low-voltage coil (3), voltage regulation coil I(4) and voltage regulation coil II(5) be placed on three core limbs (1) respectively; Low-voltage coil (3) is a road continous way and intermediate symmetry structure, is made up of a coil; High-tension coil (2) inserts for two-way parallel connection and shields continous way, and high-tension coil head end (6) is for inserting protected type winding structure, and other line segment is continous way winding structure; Between high-tension coil (2) and low-voltage coil (3) and high-tension coil (2) and be paper web oil clearance insulation system (12) between voltage regulation coil I and voltage regulation coil II; Structure between voltage regulation coil I tail end (7) with voltage regulation coil end paper circle is identical with the structure between voltage regulation coil II head end (8) and voltage regulation coil end paper circle, be equipped with voltage regulation coil electrostatic ring (10), voltage regulation coil internal side diameter square ring (16) and voltage regulation coil dihedral ring (14), for improving impact characteristics and the Electric Field Distribution of voltage regulation coil end; Be positioned at core limb inner side be provided with iron core column barricade (11) between low-voltage coil (3) and core limb (1), make the corner angle of core limb all be placed within the electric shield of iron core column barricade, the partial discharge quantity reduction of device body.
2. a kind of 132kV double winding on-load tap-changing transformer insulation system according to claim 1, is characterized in that: the coated electric insulation crimped paper of high-tension coil head end (6) outlet, strengthens high-tension coil head end electrical insulation strength; Outermost layer adds the two square ring (13) in double-deck first head place of high-tension coil, and support with stay between voltage regulation coil internal side diameter square ring (16) and high-tension coil head end, blank space crimped paper is filled, and extends the creepage distance between pressure regulation circle.
3. a kind of 132kV double winding on-load tap-changing transformer insulation system according to claim 1 and 2, is characterized in that: the top of described high-tension coil (2) and low-voltage coil (3) is fixed by pressing plate (17), secondary pressing plate (18) and briquetting (19).
CN201510173612.5A 2015-04-14 2015-04-14 A kind of 132kV double windings ULTC insulation system Active CN104752039B (en)

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CN201510173612.5A CN104752039B (en) 2015-04-14 2015-04-14 A kind of 132kV double windings ULTC insulation system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106653324A (en) * 2016-12-01 2017-05-10 保定天威保变电气股份有限公司 Voltage-regulating winding end part insulating structure for controlling creepage for transformer
CN109192455A (en) * 2018-08-06 2019-01-11 孝感安元机械科技有限公司 transformer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0286107A (en) * 1988-09-22 1990-03-27 Hitachi Ltd Three-phase on-load tap changing transformer
CN201060733Y (en) * 2007-06-19 2008-05-14 上海南桥变压器有限责任公司 Device structure of enhanced anti-outburst short-circuit capacity transformer
CN102360828A (en) * 2011-08-04 2012-02-22 保定天威集团有限公司 220kV-grade Vx connection traction transformer body structure
CN103280305A (en) * 2013-07-01 2013-09-04 保定天威集团有限公司 132kV-class 36-pulse-wave transmission rectifier transformer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0286107A (en) * 1988-09-22 1990-03-27 Hitachi Ltd Three-phase on-load tap changing transformer
CN201060733Y (en) * 2007-06-19 2008-05-14 上海南桥变压器有限责任公司 Device structure of enhanced anti-outburst short-circuit capacity transformer
CN102360828A (en) * 2011-08-04 2012-02-22 保定天威集团有限公司 220kV-grade Vx connection traction transformer body structure
CN103280305A (en) * 2013-07-01 2013-09-04 保定天威集团有限公司 132kV-class 36-pulse-wave transmission rectifier transformer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106653324A (en) * 2016-12-01 2017-05-10 保定天威保变电气股份有限公司 Voltage-regulating winding end part insulating structure for controlling creepage for transformer
CN109192455A (en) * 2018-08-06 2019-01-11 孝感安元机械科技有限公司 transformer
CN109192455B (en) * 2018-08-06 2020-12-08 嘉兴华竹电子有限公司 Transformer device

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