CN2054197U - Insulation structure of superhigh voltage tri-coil transformer - Google Patents

Insulation structure of superhigh voltage tri-coil transformer Download PDF

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Publication number
CN2054197U
CN2054197U CN 89209560 CN89209560U CN2054197U CN 2054197 U CN2054197 U CN 2054197U CN 89209560 CN89209560 CN 89209560 CN 89209560 U CN89209560 U CN 89209560U CN 2054197 U CN2054197 U CN 2054197U
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CN
China
Prior art keywords
coil
winding
transformer
insulating paper
paper cylinder
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.)
Withdrawn
Application number
CN 89209560
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Chinese (zh)
Inventor
李文海
周重芝
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SHENYANG TRANSFORMER FACTORY
Original Assignee
SHENYANG TRANSFORMER FACTORY
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 SHENYANG TRANSFORMER FACTORY filed Critical SHENYANG TRANSFORMER FACTORY
Priority to CN 89209560 priority Critical patent/CN2054197U/en
Publication of CN2054197U publication Critical patent/CN2054197U/en
Withdrawn legal-status Critical Current

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Abstract

The utility model relates to a new insulation structure of a single-phase or three-phase superhigh voltage tri-coil transformer. The insulation structure of superhigh voltage tri-coil transformer is applicable to a pie winding transformer, and belongs to an electric transmission and transformation equipment. The utility model divides an intermediate-voltage winding coil into two parts and places the two parts at the internal and external sides of the high-voltage coil respectively. The utility model has the advantages of compact structure; the utility model abates the weight of the transformer, reduces electric loss and increases the efficiency of the transformer.

Description

Insulation structure of superhigh voltage tri-coil transformer
The utility model is single-phase or a kind of new insulation system of three-phase superhigh pressure three-winding transformer.Be applicable to the pie winding transformer, belong to power transmission and transforming equipment.
At present, transformer generally can be divided into main transformer that links to each other with motor and the system interconnection transformer that joins with electrical network.System interconnection transformer is generally self coupling or three-winding type and mostly is on-load voltage regulation.Main transformer all is two coil transformers, and self-coupling on-load voltage-regulating transformer generally all is three coil transformer.The aligning method of winding can have various ways according to the requirement of aspects such as impedance, and the insulation system of this class transformer is than main transformer complexity.Especially the longitudinal insulating structure of winding.Concerning the big capacity of superhigh pressure, traditional insulation system is unfavorable for improving the winding impact characteristics, also is unfavorable for reducing transformer loss and hauled weight.
But the purpose of this utility model provides a kind of impact characteristics weight reduction again that promptly helps improving coil, reduces loss, the insulation system of the compact conformation of raising the efficiency.
The utility model is realized with following technical scheme: a part of number of turn of middle pressure winding is positioned over high pressure winding outside diameter and near its end, constitutes new winding, occupy the alternate place that is not fully utilized.In addition, the small part number of turn with middle pressure winding occupies a part of available space between high pressure-middle pressure winding again, and this part number of turn still belongs to former middle pressure winding and must not constitute new winding.The new winding that places the high pressure winding outside is that the variation by himself structure improves the impact characteristics of going out under the voltage effect.In the design of EHV transformer, because of involving industrial frequency experiment voltage, alternate operation is relatively 1.5 times, alternate size is bigger, but because the closer to the high pressure winding overhang, alternate test is just low more, original 3-phase autotransformer whole alternate be same size, its deficiency is can make full use of in the space of voltage lower position.Same reason, the high pressure winding between the middle pressure winding also some space be not utilized.With carrying object is that lead occupies these places, has improved the usage factor of window unshakable in one's determination undoubtedly, makes transformer device structure compact more.
The utlity model has and alleviate transformer weight, reduce electrical loss, raise the efficiency, reduce the characteristics of the outer limit of transformer transportation.
Now in conjunction with the accompanying drawings the utility model is described in further detail.
Fig. 1 is that the utility model is along longitudinal sectional drawing unshakable in one's determination.
Fig. 1 is a specific embodiment of the utility model.In the outer felt of transformer core 1 around low-voltage coil 2, insulating paper cylinder 11 is placed in low-voltage coil 2 outsides, in insulating paper cylinder 11 outer felt around voltage regulation coil 3, insulating paper cylinder 12 is placed in voltage regulation coil 3 outsides, around middle pressure winding coil 4, the middle pressure winding coil 4 top width of cloth increase to size in the outer felt of insulating paper cylinder 12, and it is little therefore to locate between winding 4 and 5 potential difference, do like this, can realize not reducing the coil working circle and freely adopt the inner shield structure.In order to ampere-turn equilibrium with improve impact characteristics.Increase the short insulating paper cylinder 8 of placement in middle pressure winding coil 4 bottoms as Main Insulation Structure of Electric.Correspondingly to improve cooling condition, the number of short paper web 8 can be decided as the case may be.Also place insulating paper cylinder 9 in middle pressure winding coil 4 outsides, in insulating paper cylinder 9 outsides, twining series connection is high pressure winding coil 5, place insulating paper cylinder 13 in the high pressure winding coil outside, the middle pressure winding coil 6 that increases newly is placed at two ends up and down in insulating paper cylinder 13 outsides, support tube 10 is strutting pieces of the newly-increased winding coil 6 of upper/lower terminal, at voltage regulation coil 3, the upper ends of the two ends of high-tension coil 5 and middle line ball group coil 4 has static board 7, H is that high pressure A arrives the mutually required alternate size of B mutually, and M is the phase spacing of the lower winding of rated voltage.Concerning no-load voltage ratio was the 500:220 EHV transformer of the second of the three ten-day periods of the hot season, H was approximately 3 times of M, also promptly can have the space of 2 times of M width to utilize in alternate certain altitude scope.The connected mode of pressure winding 6 and high pressure winding 5 can be the N type and also can be the ㄇ type in newly-increased, winding 6 and winding 4 are for being connected in series, tie point is generally on top, have at line end and to carry or during No-load changer, one end of winding 6 also will join with winding 3 or realize joining by switch, and upper and lower two parts of winding 6 are to be connected in parallel.
The utility model had under the identical condition of short-circuit impedance setting up with the comparable traditional structure of the improvement of winding 4 of winding 6 than former super-pressure auto-transformer and chooses littler core-diameter, thereby reduced product weight and reduce the outer limit of transportation. Be conducive to improve public i.e. middle impact characteristics of pressing winding, and the ampere-turn equilibrium between favourable winding, electric power reduced. And can reduce added losses, improve the efficient of transformer.

Claims (1)

1, a kind of insulation system of superhigh pressure three coil transformer, in the outer felt of transformer core 1 around low-voltage coil 2, in the low-voltage coil outer felt around voltage regulation coil 3, place insulating paper cylinder 12 in voltage regulation coil 3 outsides, in the outer felt of insulating paper cylinder 12 around middle pressure winding coil 4, press the winding coil 4 top width of cloth to increase in it is characterized in that to size, increase short insulating paper cylinder 8 as Main Insulation Structure of Electric in the bottom of middle pressure winding coil 4, also place insulating paper cylinder 9 in middle pressure winding coil 4 outsides, the outside at insulating paper cylinder 9, twining series connection is high-tension coil winding 5, insulating paper cylinder 13 is placed in its outside, on insulating paper cylinder 13 outsides, the middle pressure winding coil 6 that increases newly is placed at following two ends, support tube 10 is on the winding coil 6, the strutting piece at following two ends, at voltage regulation coil 3, the two ends of high-tension coil 5 and the middle upper ends of winding coil 4 of pressing have static board 7, press the winding 6 and the connected mode of high pressure winding 5 to can be the N type in newly-increased, also can be the ㄇ type, press winding 6 and middle pressure winding 4 for being connected in series in newly-increased, one end of middle pressure winding 6 also will join with pressure regulation winding 3 or realize joining by switch, on the newly-increased middle pressure winding 6, following two parts are to be connected in parallel.
CN 89209560 1989-09-26 1989-09-26 Insulation structure of superhigh voltage tri-coil transformer Withdrawn CN2054197U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 89209560 CN2054197U (en) 1989-09-26 1989-09-26 Insulation structure of superhigh voltage tri-coil transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 89209560 CN2054197U (en) 1989-09-26 1989-09-26 Insulation structure of superhigh voltage tri-coil transformer

Publications (1)

Publication Number Publication Date
CN2054197U true CN2054197U (en) 1990-03-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 89209560 Withdrawn CN2054197U (en) 1989-09-26 1989-09-26 Insulation structure of superhigh voltage tri-coil transformer

Country Status (1)

Country Link
CN (1) CN2054197U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101170011B (en) * 2007-09-11 2010-12-15 中电电气集团有限公司 Single-phase or Vx connection traction transformer coiling structure for electric railway AT power supply mode
CN102820128A (en) * 2012-09-14 2012-12-12 保定天威集团有限公司 Medium-voltage regulating coil separately-placed transformer major-insulation structure
CN109326422A (en) * 2017-08-01 2019-02-12 特变电工沈阳变压器集团有限公司 A kind of high-impedance transformer of middle pressure winding division arrangement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101170011B (en) * 2007-09-11 2010-12-15 中电电气集团有限公司 Single-phase or Vx connection traction transformer coiling structure for electric railway AT power supply mode
CN102820128A (en) * 2012-09-14 2012-12-12 保定天威集团有限公司 Medium-voltage regulating coil separately-placed transformer major-insulation structure
CN109326422A (en) * 2017-08-01 2019-02-12 特变电工沈阳变压器集团有限公司 A kind of high-impedance transformer of middle pressure winding division arrangement

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