CN101826391B - Segmented layered structure transformer - Google Patents

Segmented layered structure transformer Download PDF

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Publication number
CN101826391B
CN101826391B CN2010103005545A CN201010300554A CN101826391B CN 101826391 B CN101826391 B CN 101826391B CN 2010103005545 A CN2010103005545 A CN 2010103005545A CN 201010300554 A CN201010300554 A CN 201010300554A CN 101826391 B CN101826391 B CN 101826391B
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China
Prior art keywords
transformer
coil winding
tap
layered structure
item
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Expired - Fee Related
Application number
CN2010103005545A
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Chinese (zh)
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CN101826391A (en
Inventor
江惠贞
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State Grid Corp of China SGCC
Fuzhou Tianyu Electric Co Ltd
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Fuzhou Tianyu Electric Co Ltd
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Priority to CN2010103005545A priority Critical patent/CN101826391B/en
Publication of CN101826391A publication Critical patent/CN101826391A/en
Application granted granted Critical
Publication of CN101826391B publication Critical patent/CN101826391B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention relates to a segmented layered structure transformer, comprising a high voltage coil winding and a low voltage coiling winding which are in spiral shapes. The spiral high voltage coil winding and the spiral low voltage coiling winding are wound at the periphery of an iron core, and the segmented layered structure transformer is characterized in that a pair of taps are respectively arranged on the two ends of an upper half section of the high voltage coil winding; the lower half section is also provided with a pair of taps; winding directions of the upper half section of the coil winding and the lower half section of the coil winding are opposite while the number of turns is same, and an upper half section of tail-end tap is connected with a lower half section of initial-end tap. The invention can effectively reduce interlayer voltage of the coil winding of the transformer and can reduce the influence on internal materials of the transformer by the interlayer voltage so as to improve the work stability of the transformer.

Description

Segmented layered structure transformer
Technical field
The present invention relates to a kind of segmented layered structure transformer, be applied to 35KV level electric power system.
Background technology
Transformer 35kV level electric power system is commonly used to meet method Yyn0, and this method that connects can cause that output current is asymmetric under secondary side asymmetric load situation, thereby primary side produces the neutral point drift.Therefore answer the power supply department requirement, produced the 35kV level and connect the design that method is Dyn11.The conventional design that 35kV level high-tension coil D connects is common layered structure, because the phase voltage that every phase coil bears is high, the number of turn is many, thereby produces very high interlayer operating voltage.Transformer wet goods dielectric is under the too high interlayer operating voltage for a long time, and ageing of insulation takes place easily, and transformer oil decomposes problems such as producing gas and partial discharge.Therefore, how addressing the above problem is the object that the present invention studies.
Summary of the invention
The present invention relates to a kind of segmented layered structure transformer, purpose is to design a kind of transformer device structure that can reduce transformer interlayer operating voltage.
Technical scheme of the present invention is achieved in that a kind of segmented layered structure transformer; Comprise and be wrapped in iron core peripheral spiral helicine high-tension coil winding and low-voltage coil winding; It is characterized in that: the two ends of said high-tension coil winding upper semisection respectively are provided with a pair of tap, and lower semisection also is provided with a pair of tap, and upper semisection coil windings and lower semisection coil windings are around on the contrary; The number of turn is identical, and the terminal tap of upper semisection is connected with the tap of lower semisection top.
The present invention can effectively solve the voltage between layers that reduces transformer coli winding, reduces the influence of voltage between layers to the transformer internal material, thereby has improved the job stability of transformer.
Description of drawings
Fig. 1 is segmented layered structure transformer basic principle figure
Fig. 2 is a segmented layered structure transformer high-tension coil structure chart
Fig. 3 is a segmented layered structure transformer high-tension coil lower semisection tap clamping sketch
Fig. 4 is a segmented layered structure transformer high-voltage coil insulation spare structure diagram (1)
Fig. 5 is a segmented layered structure transformer high-voltage coil insulation spare structure diagram (2)
Fig. 6 is a segmented layered structure transformer high-tension coil coiling sketch
Fig. 7 is a segmented layered structure transformer device body scheme of erection
Embodiment
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4; Fig. 5, Fig. 6 and Fig. 7, a kind of segmented layered structure transformer; Comprise being wrapped in iron core peripheral spiral helicine high-tension coil winding and low-voltage coil winding, the two ends of said high-tension coil winding upper semisection respectively are provided with a pair of tap, and lower semisection also is provided with a pair of tap; Upper semisection coil windings and lower semisection coil windings are around on the contrary, and the number of turn is identical, and the terminal tap of upper semisection is connected with the tap of lower semisection top.
The latter half of said high-tension coil winding upper semisection is provided with some terminal taps, through middle part tap changer and the corresponding connection of some tops tap that the first half of lower semisection is provided with, is beneficial to reduce the interlayer operating voltage of coil windings.
Explain that according to Fig. 2 there are following characteristics in this novel high-pressure loop construction:
Main empty path A1 is followed successively by from inside to outside: item is 6. cardboard+item 8. 9. corrugation oil duct of cardboard+item of oil duct+item that 7. insulate of corrugation oil duct+item 5., and the A1 minimum value is 20mm
High-tension coil is followed successively by apart from core end insulation H1 from top to bottom: core insulation+item 4. paper circle+item 3. square ring+item 2. insulating end ring+item 1. hold insulation, the h1 minimum value is 35mm.
Middle part insulation H2 is for be followed successively by from top to bottom: 10. item 10. end insulation+item (11) insulating end ring+item (12) square ring+item (12) square ring+item (11) insulating end ring+item holds insulation, and the H2 minimum value is 41mm.
Because high-tension coil does not highly have ampere-turn at H2, causes along coil height ampere-turn skewness, produce horizontal stray field and relevant additional impedance thus, should revise short-circuit impedance during the design high-tension coil.
Whole high-tension coil is without electrostatic shielding, and the employing square ring improves electric field, improves dielectric strength.
High-tension coil is the 35kV level, and D connects, and wire insulation is 0.45mm;
High-tension coil is a segmented layered structure, and the two parts that are divided into are arranged above and below vertically, two parts insulation system symmetry up and down, but around on the contrary.
Layer insulation: choose by the interlayer operating voltage, and will suitably strengthen;
Axial oil road size and quantity are calculated to confirm it by temperature rise;
Two parts distribute at the total number of turns and the number of turn up and down, oil duct size, quantity and placement location, and choosing of layer insulation is all identical.
The shunting tap 2,4,6 of the first half is drawn for radial at outermost layer; The shunting tap 3,5,7 of Lower Half is at innermost layer, for axially drawing.
The coil tap 3,5,7 of high-tension coil the latter half needs to grip with wire clamp when the lead-in wire assembling, sees Fig. 3 for details.
High-voltage coil insulation spare structure has novelty: item is insulating end ring 2., adopts paper circle both sides to paste different length and width cushion block, sees Fig. 4 for details.The item oil duct that 7. insulate: two ends and middle part otch see Fig. 5 for details to place square ring.
High-voltage coil and low-voltage coil cover winding technologe; The maximum characteristics of coiling high-tension coil are: by two parts up and down simultaneously around, its coiling is in proper order: on coil winding machine, load onto the high-tension coil winding former and grab and the low-voltage coil that has wound is fixed on the accurate position of high-tension coil winding former grabs by the high-tension coil structure chart and load onto 5. corrugation oil duct of item successively, item is cardboard 6.; The item oil duct that 7. insulate is grabbed in half place line of whole high-tension coil height and is confirmed (12) square ring position; Simultaneously first-class (12) square ring of two parts up and down, (a 11) insulating end ring grab up and down two parts re-lay simultaneously item 9. the corrugation oil duct grab up and down that two parts have fixed respectively around head, (item 2. item 3. item 4. in winding process, temporarily do not load onto; When the device body assembles; Refill and join item 2. item is 3. 4.), item 2. item 3. item 4. assemble interim wood block filler in the position, to keep its 2. 3. item former having living space 4. of item; Lay item 1. the end insulation grab then up and down two parts simultaneously by two ends to middle spaced winding grab after the intact regulation number of turn, lay item 10. end insulate; Method according to this behind intact ground floor around complete high-tension coil, sees Fig. 6 for details.

Claims (2)

1. segmented layered structure transformer; Comprise and be wrapped in iron core peripheral spiral helicine high-tension coil winding and low-voltage coil winding; It is characterized in that: the two ends of said high-tension coil winding upper semisection respectively are provided with a pair of tap, and lower semisection also is provided with a pair of tap, and upper semisection coil windings and lower semisection coil windings are around on the contrary; The number of turn is identical, and the terminal tap of upper semisection is connected with the tap of lower semisection top.
2. segmented layered structure transformer according to claim 1 is characterized in that: the terminal tap of said high-tension coil winding upper semisection is beneficial to reduce the interlayer operating voltage of coil windings through the corresponding connection with the tap of lower semisection top of middle part tap changer.
CN2010103005545A 2009-07-29 2010-01-21 Segmented layered structure transformer Expired - Fee Related CN101826391B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010103005545A CN101826391B (en) 2009-07-29 2010-01-21 Segmented layered structure transformer

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN200910304971 2009-07-29
CN200910304971.4 2009-07-29
CN2010103005545A CN101826391B (en) 2009-07-29 2010-01-21 Segmented layered structure transformer

Publications (2)

Publication Number Publication Date
CN101826391A CN101826391A (en) 2010-09-08
CN101826391B true CN101826391B (en) 2012-04-25

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CN2010103005545A Expired - Fee Related CN101826391B (en) 2009-07-29 2010-01-21 Segmented layered structure transformer

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102360794B (en) * 2011-05-26 2014-03-26 艾默生网络能源有限公司 Phase shift rectifier transformer and series connection topology frequency converter
CN103680864A (en) * 2013-12-30 2014-03-26 国能子金电器(苏州)有限公司 Coil of combined transformer for photovoltaic power generation
CN106291296B (en) * 2016-09-29 2018-10-26 国家电网公司 A kind of partial discharge of transformer defects simulation device and method
CN108847331B (en) * 2018-07-02 2024-01-19 河南森源电气股份有限公司 Transformer and coil assembly
CN111354548A (en) * 2020-04-09 2020-06-30 常州工学院 Oil-immersed transformer
CN117524670B (en) * 2023-10-30 2024-08-23 山东泰开变压器有限公司 Layer-type winding voltage regulating structure of on-load linear voltage regulating distribution transformer

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Owner name: STATE ELECTRIC NET CROP.

Effective date: 20121101

C41 Transfer of patent application or patent right or utility model
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Effective date of registration: 20121101

Address after: Nanping East Road, Jinan District, Fuzhou city of Fujian Province, No. 130 350012

Patentee after: Fuzhou Tianyu Electric Co., Ltd.

Patentee after: State Grid Corporation of China

Address before: 350012 No. 80 East Nanping Road, Fuzhou, Fujian

Patentee before: Fuzhou Tianyu Electric Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120425

Termination date: 20200121