CN102646506B - High-voltage coil for dual-voltage conversion dry type transformer - Google Patents

High-voltage coil for dual-voltage conversion dry type transformer Download PDF

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Publication number
CN102646506B
CN102646506B CN201210156673.7A CN201210156673A CN102646506B CN 102646506 B CN102646506 B CN 102646506B CN 201210156673 A CN201210156673 A CN 201210156673A CN 102646506 B CN102646506 B CN 102646506B
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coil
voltage
terminal
insulation
rated
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CN102646506A (en
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柳生旺
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Zhejiang Zhengtai Electric Technology Co ltd
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Chint Electric Co Ltd
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Abstract

The invention provides a high-voltage coil for a dual-voltage conversion dry type transformer. The high-voltage coil comprises an inner coated insulation and an outer coated insulation located outside the inner coated insulation. A coil which is manufactured by coiling a lead wire for a set turn number is arranged between the inner coated insulation and the outer coated insulation; an interlayer insulation is arranged between two adjacent turns of the coil; and end insulations are arranged at the left end and the right end of the coil. The high-voltage coil for the dual-voltage conversion dry type transformer is characterized in that the coil is divided into eight sections with the same winding direction; the coil is in a dual-panel structure and is provided with a high rated voltage and a low rated voltage; and a front panel corresponds to the high rated voltage and a back panel corresponds to the low rated voltage. A wire inlet terminal, a voltage-regulating terminal a and a wire outlet terminal are arranged on the front panel in sequence from left to right; and a voltage-regulating terminal b is arranged on the back panel. The high-voltage coil provided by the invention overcomes defects in the prior art. The high-voltage coil can be used by means of converting between the high rated voltage and the low rated voltage by changing the wiring connection manner, thereby avoiding repeated investment when the system voltage is updated. Compared with the two currently-used transformers, the high-voltage coil has the advantages of small volume, small occupied area and low cost of production materials.

Description

A kind of two voltage transitions dry transformer high-tension coils
Technical field
The present invention relates to a kind of two voltage transitions dry transformer high-tension coils, can be used in electric power system, belong to transformer technology field.
Background technology
The dry-type transformer using in electric power system is at present mostly univoltage dry-type transformer, high-tension coil is the important component part of dry-type transformer, as shown in Figure 1, existing high-tension coil comprises interior bag insulation 2 and is positioned at the outsourcing insulation 4 outside bag insulation 2, the coil of the setting number of turn being turned to by wire 1 is between interior bag insulation 2 and outsourcing insulation 4, between adjacent two circle coils, be provided with layer insulation 3, between interior bag insulation 2 and outsourcing insulation 4, be cast with mixture of epoxy resins 5, the two ends, left and right of coil are provided with end insulation 6.
Above-mentioned high-tension coil has the following disadvantages: in the situation that input voltage is certain, a transformer only has a kind of rated voltage, can only be used for a kind of distribution system of voltage, in the time that the input voltage of this distribution system raises or reduces, use the transformer of this high-tension coil just cannot re-use.
Summary of the invention
The object of this invention is to provide a kind of dry transformer high-tension coil that can change use between two rated voltages.
In order to achieve the above object, technical scheme of the present invention is to provide a kind of two voltage transitions dry transformer high-tension coils, comprise interior bag insulation and be positioned at the outsourcing insulation outside bag insulation, the coil of the setting number of turn being turned to by wire is between interior bag insulation and outsourcing insulation, between adjacent two circle coils, be provided with layer insulation, two ends, coil left and right are provided with end insulation, it is characterized in that: described coil is divided into around to identical eight sections; Described coil is double sided board structure, is provided with high and low two kinds of rated voltages, the corresponding high voltage-rated of front plate, the corresponding low rated voltage of backplate.In front plate, be from left to right provided with successively input terminal, pressure regulation terminal a and outlet terminal, input terminal comprises the input terminal a that connects first paragraph coil start-up portion, input terminal b is connected between first paragraph coil and second segment coil, and input terminal c is connected between second segment coil and the 3rd section of coil; Outlet terminal comprises the outlet terminal a that connects the 8th section of coil latter end, and outlet terminal b is connected between the 6th section of coil and the 7th section of coil, and outlet terminal c is connected between the 7th section of coil and the 8th section of coil; Backplate is provided with pressure regulation terminal b.
Preferably, the number of turn of described wire is chosen by high voltage-rated, and the size of wire is chosen by rated current corresponding to low rated voltage.
Preferably, described high voltage-rated is 15kV, and described low rated voltage is 10kV.
Preferably, the number of turn corresponding to described low rated voltage is made as four sections of the centres of described coil, and the number of turn of high and low two kinds of poor correspondences of rated voltage is made as initial two sections and last two sections of described coil.
Preferably, every section of equal turn numbers of initial two sections and last two sections of described coil, structure is identical.
A kind of two voltage transitions dry transformer high-tension coils provided by the invention in use, if input voltage is 10~15kV, are selected high voltage-rated, connect respectively into and out of line terminals a into and out of line, disconnect pressure regulation terminal b, and with pressure regulation terminal, a carrys out pressure regulation; If input voltage is less than 10kV, select low rated voltage, connect respectively input terminal a, input terminal b and outlet terminal a, outlet terminal b, connect respectively into and out of line terminals c into and out of line, disconnect pressure regulation terminal a, with pressure regulation terminal, b carrys out pressure regulation.While using two kinds of rated voltages, voltage change ratio error is all very little, and coil reactance is highly equal, and short-circuit impedance error is also very little.
Device provided by the invention has overcome the deficiencies in the prior art, by changing the connected mode of wiring, can between high and low two rated voltages, change use, overlapping investment while having avoided system voltage upgrading; Compared with two transformers of current use, volume is little, floor space is little, and the cost of material is low in production.
Brief description of the drawings
Fig. 1 is the high-voltage coil structure schematic diagram of former univoltage dry-type transformer;
Fig. 2 is a kind of two voltage transitions structure of high-voltage coil for dry-type transformer schematic diagrames provided by the invention;
Fig. 3 be in Fig. 2 B to (front plate) structural representation;
Fig. 4 be in Fig. 2 C to (backplate) structural representation;
Fig. 5 is the inner number of turn row of a kind of two voltage transitions dry transformer high-tension coils provided by the invention portion schematic diagram.
Embodiment
For the present invention is become apparent, hereby with a preferred embodiment, and coordinate accompanying drawing to be described in detail below.
Fig. 2 is a kind of two voltage transitions structure of high-voltage coil for dry-type transformer schematic diagrames provided by the invention, Fig. 3 be in Fig. 2 B to structural representation, Fig. 4 be in Fig. 2 C to structural representation, in conjunction with Fig. 2, Fig. 3 and Fig. 4, described two voltage transitions dry transformer high-tension coils are made up of wire 1, interior bag insulation 2, layer insulation 3, outsourcing insulation 4, mixture of epoxy resins 5, end insulation 6, input terminal 7, pressure regulation terminal a8, outlet terminal 9 and pressure regulation terminal b10.
Outsourcing insulation 4 is positioned at bag 2 outsides of insulating, the coil of the setting number of turn being turned to by wire 1 is between interior bag insulation 2 and outsourcing insulation 4, between adjacent two circle coils, be provided with layer insulation 3, between interior bag insulation 2 and outsourcing insulation 4, be cast with mixture of epoxy resins 5, the two ends, left and right of coil are also provided with end insulation 6.
Interior bag insulation 2 and outsourcing insulation 4 are glass fiber grid cloth, and thickness is generally 0.5~2.0mm, and sizing grid is 10mm × 10mm, can play the effect that improves coil intensity after cast cured explosive.
Layer insulation 3 is the soft composite insulating foil of polyester film and polyester fibre non woven fabric, works to improve dielectric strength.
The epoxy resin that mixture of epoxy resins 5 is a kind of filler that is silicon powder with main component, is mainly used to fill coil internal voids, and fixing cord 1 plays the effect that improves dielectric strength.
Coil is double sided board structure, has high and low two kinds of rated voltages, the corresponding high voltage-rated of front plate, the corresponding low rated voltage of backplate.High voltage-rated is 15kV, and low rated voltage is 10kV.The number of turn of wire 3 is chosen by high voltage-rated, and size is chosen by rated current corresponding to low rated voltage.
Coil is divided into around to identical eight sections, four sections of the centres that the number of turn corresponding to low rated voltage is coil, the number of turn of high and low two kinds of poor correspondences of rated voltage is coil initial two sections and last two sections.Every section of equal turn numbers of initial two sections and last two sections of coil, structure is identical.
In conjunction with Fig. 5, in front plate, from left to right arrange successively input terminal 7, pressure regulation terminal a8 and outlet terminal 9, on backplate, arrange pressure regulation terminal b10.Input terminal 7 comprises the input terminal a7-1 that connects first paragraph coil start-up portion, and input terminal c7-2 is connected between first paragraph coil and second segment coil, and input terminal b7-3 is connected between second segment coil and the 3rd section of coil; Outlet terminal 9 comprises the outlet terminal a9-1 that connects the 8th section of coil latter end, and outlet terminal b9-2 is connected between the 6th section of coil and the 7th section of coil, and outlet terminal c9-3 is connected between the 7th section of coil and the 8th section of coil.
A kind of two voltage transitions dry transformer high-tension coils provided by the invention by changing the connected mode of wiring, can be changed use between high and low two rated voltages.If input voltage is 10~15kV, select high voltage-rated, connect respectively input terminal a7-1, outlet terminal a9-1 into and out of line, disconnect pressure regulation terminal b, with pressure regulation terminal, a carrys out pressure regulation; If input voltage is less than 10kV, select low rated voltage, connect respectively input terminal a7-1, input terminal b7-3 and outlet terminal a9-1, outlet terminal b9-2, coil starts two sections and last two sections of counteractings respectively, connect respectively into and out of line terminals c into and out of line, disconnect pressure regulation terminal a, with pressure regulation terminal, b carrys out pressure regulation.

Claims (4)

1. a voltage transitions dry transformer high-tension coil, comprise interior bag insulation (2) and be positioned at the outer outsourcing insulation (4) of bag insulation (2), the coil of the setting number of turn being turned to by wire (1) is positioned between bag insulation (2) and outsourcing insulation (4), between adjacent two circle coils, be provided with layer insulation (3), between interior bag insulation (2) and outsourcing insulation (4), be cast with mixture of epoxy resins (5), the two ends, left and right of coil are provided with end insulation (6), it is characterized in that: described coil is divided into around to identical eight sections, described coil is double sided board structure, is provided with high and low two kinds of rated voltages, the corresponding high voltage-rated of front plate, the corresponding low rated voltage of backplate, in front plate, be from left to right provided with successively input terminal (7), pressure regulation terminal a (8) and outlet terminal (9), input terminal (7) comprises input terminal a (7-1), input terminal c (7-2) and input terminal b (7-3), input terminal a (7-1) connects first paragraph coil start-up portion, input terminal c (7-2) is connected between first paragraph coil and second segment coil, and input terminal b (7-3) is connected between second segment coil and the 3rd section of coil, outlet terminal (9) comprises outlet terminal a (9-1), outlet terminal b (9-2) and outlet terminal c (9-3), outlet terminal a (9-1) connects the 8th section of coil latter end, outlet terminal b (9-2) is connected between the 6th section of coil and the 7th section of coil, and outlet terminal c (9-3) is connected between the 7th section of coil and the 8th section of coil, backplate is provided with pressure regulation terminal b (10),
The number of turn corresponding to described low rated voltage is made as four sections of the centres of described coil, and the number of turn of high and low two kinds of poor correspondences of rated voltage is made as initial two sections and last two sections of described coil.
2. a kind of two voltage transitions dry transformer high-tension coils as claimed in claim 1, it is characterized in that: the number of turn of described wire (1) is chosen by high voltage-rated, the size of wire (1) is chosen by rated current corresponding to low rated voltage.
3. a kind of two voltage transitions dry transformer high-tension coils as claimed in claim 1 or 2, is characterized in that: described high voltage-rated is 15kV, and described low rated voltage is 10kV.
4. a kind of two voltage transitions dry transformer high-tension coils as claimed in claim 3, is characterized in that: every section of equal turn numbers of initial two sections and last two sections of described coil, structure is identical.
CN201210156673.7A 2012-05-17 2012-05-17 High-voltage coil for dual-voltage conversion dry type transformer Active CN102646506B (en)

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CN102646506B true CN102646506B (en) 2014-11-26

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326181A (en) * 1977-11-18 1982-04-20 General Electric Company High voltage winding for dry type transformer
SU1150665A1 (en) * 1983-06-15 1985-04-15 Производственное Объединение "Уралэлектротяжмаш" Им.В.И.Ленина Transformer
CN201315223Y (en) * 2008-09-26 2009-09-23 江西大族电源科技有限公司 Novel high tension coil for encapsulating dry type transformer
CN101847494A (en) * 2010-05-12 2010-09-29 九川(浙江)科技股份有限公司 Double-voltage dry type transformer
CN101930833A (en) * 2009-06-26 2010-12-29 苏州工业园区隆盛电器成套设备制造有限公司 Terminal arrangement structure of epoxy cast dry transformer high-voltage coil
CN202120724U (en) * 2011-05-19 2012-01-18 正泰电气股份有限公司 High-voltage coil of large-capacity 35kV dry type transformer
CN202134380U (en) * 2011-07-11 2012-02-01 申达电气集团有限公司 Double-voltage dry type transformer
CN102360837A (en) * 2011-10-10 2012-02-22 正泰电气股份有限公司 High-tension coil of dry-type transformer for photovoltaic power generation
CN202650799U (en) * 2012-05-17 2013-01-02 正泰电气股份有限公司 High-voltage coil of two-voltage conversion dry-type transformer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5458819A (en) * 1977-10-19 1979-05-11 Hitachi Ltd Transformer winding

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326181A (en) * 1977-11-18 1982-04-20 General Electric Company High voltage winding for dry type transformer
SU1150665A1 (en) * 1983-06-15 1985-04-15 Производственное Объединение "Уралэлектротяжмаш" Им.В.И.Ленина Transformer
CN201315223Y (en) * 2008-09-26 2009-09-23 江西大族电源科技有限公司 Novel high tension coil for encapsulating dry type transformer
CN101930833A (en) * 2009-06-26 2010-12-29 苏州工业园区隆盛电器成套设备制造有限公司 Terminal arrangement structure of epoxy cast dry transformer high-voltage coil
CN101847494A (en) * 2010-05-12 2010-09-29 九川(浙江)科技股份有限公司 Double-voltage dry type transformer
CN202120724U (en) * 2011-05-19 2012-01-18 正泰电气股份有限公司 High-voltage coil of large-capacity 35kV dry type transformer
CN202134380U (en) * 2011-07-11 2012-02-01 申达电气集团有限公司 Double-voltage dry type transformer
CN102360837A (en) * 2011-10-10 2012-02-22 正泰电气股份有限公司 High-tension coil of dry-type transformer for photovoltaic power generation
CN202650799U (en) * 2012-05-17 2013-01-02 正泰电气股份有限公司 High-voltage coil of two-voltage conversion dry-type transformer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP昭54-58819A 1979.05.11 *

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Effective date of registration: 20220621

Address after: 314004 plant 6, No. 379, Ziyu Road, Daqiao Town, Nanhu District, Jiaxing City, Zhejiang Province

Patentee after: Zhejiang Zhengtai Electric Technology Co.,Ltd.

Address before: 201614 No. 855, Wen Jie Road, Shanghai, Songjiang District

Patentee before: Chint Electric Co.,Ltd.