CN105185539A - Insulation dry-type transformer of 20kV voltage class - Google Patents
Insulation dry-type transformer of 20kV voltage class Download PDFInfo
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- CN105185539A CN105185539A CN201510596362.6A CN201510596362A CN105185539A CN 105185539 A CN105185539 A CN 105185539A CN 201510596362 A CN201510596362 A CN 201510596362A CN 105185539 A CN105185539 A CN 105185539A
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Abstract
The invention discloses an insulation dry-type transformer of 20kV voltage class, which is characterized by comprising an iron core, an upper clamp and a lower clamp; a low voltage coil winds the outer layer of the iron core; a high voltage coil winds the outer layer of the low voltage coil; an insulating part is mounted between the upper clamp and the iron core, and between the lower clamp and the iron core; a temperature controller is mounted on the upper clamp; an upper cushion block is mounted on the top end of each of the low voltage coil and the high voltage coil while a lower cushion block is mounted at the bottom end of each of the low voltage coil and the high voltage coil; a plurality of pad pins are mounted below the iron core; and a fan is mounted at the upper part of each pad pin. Through the mode, compared with the same-capacity products satisfying the national standard GB/T10228-2008 (technical parameters and requirements for dry-type transformers), the no-load loss of the insulation dry-type transformer of 20kV voltage class is reduced by about 20%, and the load loss is reduced by about 10%.
Description
Technical field
The present invention relates to field transformer, particularly relate to a kind of SC (B) 11 type lowaloss epoxy cast thin insulating dry-type transformer of 20kV electric pressure.
Background technology
Because resin casting dry-type transformer has environmentally safe, non-maintaining, the feature that anti-short circuit capability is strong, so be widely used in the place higher to environmental requirement, as shopping mall, airport, hotel, office building etc., the power load fluctuation in these places is larger, and most time transformer is all in the state of zero load or underloading, load loss is the resistance loss of coil, under this kind of state, flow through coil current less, load loss is smaller, but no-load loss is loss unshakable in one's determination, as long as it is just lossy to set up magnetic flux, and loss ratio is more constant, when no-load transformer or underloading, no-load loss is the dominant loss of transformer.So reduce the no-load loss of transformer, be reduce transformer loss major way.
20kV distribution line is that nationwide only has the distinctive electric pressure of Jiangsu Power Grid, it is large that the transmission line of this voltage has transmission capacity compared to 10kV distribution line, the advantage that line loss is little, applicable duty ratio is more concentrated, and the area that specific load is larger uses.Recent years, along with the extensive use gradually of 20kV distribution system, the performance of 20kV product is also concerned gradually, and complete compared to 10kV product line, specification is various, function admirable, 20kV Cast Resin Dry-Type Transformer product is single, and specification is few, and performance is than backwardness, how to promote the performance of 20kV Cast Resin Dry-Type Transformer, the loss reducing this series products has also become a new problem.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of insulating dry type transformer of 20kV electric pressure.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of insulating dry type transformer of 20kV electric pressure, comprise: iron core, upper clamping piece and lower clamping piece, described iron core comprises core limb, upper yoke and lower yoke, vertical and the ground of described core limb, described upper yoke and described lower yoke parallel to the ground, described core limb both sides are provided with arm-tie, are provided with insulation board between described iron core and described arm-tie;
Described skin unshakable in one's determination is wound with low-voltage coil, and described low-voltage coil skin is wound with high-tension coil, is provided with insulating cylinder between described high-tension coil and described low-voltage coil;
Described upper clamping piece and described lower clamping piece are arranged on described upper yoke and described lower yoke by other screw rod and core through screw rod respectively;
Described upper clamping piece and be provided with insulating part between described lower clamping piece and described iron core, described upper clamping piece is provided with temperature controller;
Described low-voltage coil and described high-tension coil top are provided with cushion block, and described low-voltage coil and described high-tension coil bottom are provided with lower cushion block;
Described below unshakable in one's determination is provided with some feets, and described feet top is provided with blower fan;
In a preferred embodiment of the present invention, the upper and lower two ends of described arm-tie are provided with pin, offer some grooves in the middle of described arm-tie.
In a preferred embodiment of the present invention, described upper cushion block offers blind hole.
In a preferred embodiment of the present invention, described insulating part is the platy structure that unsaturated polyester glass fiber strengthens BMC die casting.
In a preferred embodiment of the present invention, the quantity of described feet is more than or equal to two pieces.
The invention has the beneficial effects as follows: the insulating dry type transformer of a kind of 20kV electric pressure of the present invention, this transformer is compared in national standard mark GB/T10228-2008 " Dry-Transformer Technology parameter and requirement ", about 20% is declined with capacity products no-load loss, load loss declines about 10%, add up with the minimizing of no-load loss merely, this type product of a 1000kVA every year can save power 4292 kilowatt hour compared to old product.
Accompanying drawing explanation
Fig. 1 is the structural representation of the insulating dry type transformer of a kind of 20kV electric pressure of the present invention.
In accompanying drawing, the mark of each parts is as follows: 1, unshakable in one's determination; 2, upper clamping piece; 3, lower clamping piece; 4, insulating part; 5, arm-tie; 6, low-voltage coil; 7, high-tension coil; 8, insulating cylinder; 9, upper cushion block; 10, lower cushion block; 11, feet; 12, blower fan; 13, temperature controller.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Refer to Fig. 1, the embodiment of the present invention comprises: a kind of insulating dry type transformer of 20kV electric pressure, comprise: iron core 1, upper clamping piece 2 and lower clamping piece 3, described unshakable in one's determination 1 comprises core limb, upper yoke and lower yoke, described unshakable in one's determination 1 has silicon steel sheet stack to form, silicon steel sheet adopt Wuhan Iron and Steel Plant high magnetic induction grain-oriented silicon steel 23QG90 coiled strip or other producer's performances quite even better product through slitting, horizontal cut after adopt 45 ° of full bias seam stacks to form, described unshakable in one's determination 1 is multistage stairstepping, and described unshakable in one's determination 1 of stack one-tenth is " day " font.
Vertical and the ground of described core limb, described upper yoke and described lower yoke parallel to the ground, described core limb both sides are provided with arm-tie 5, described arm-tie about 5 two ends are provided with pin, described upper clamping piece 2 and described lower clamping piece 3 is connected by pin, the described upper yoke that stepped up by described upper clamping piece 2 and described lower clamping piece 3 and lower yoke are coupled together by described arm-tie 5, makes whole described unshakable in one's determination 1 to form an entirety.
Some grooves are offered, to reduce the eddy current loss that described arm-tie 5 produces in magnetic field in the middle of described arm-tie 5.
Between described unshakable in one's determination 1 and described arm-tie 5, insulation board is installed.
Described 1 skin unshakable in one's determination is wound with low-voltage coil 6, and described low-voltage coil 6 adopts Copper Foil or the copper wire winding of low-loss oxygen-free copper, adopts the preimpregnation DMD paper of F class F insulation to insulate as layer between Copper Foil, and copper cash is the F class F insulation wire of double glass fiber coating bag.
The present embodiment comprises three described low-voltage coils 6, lay respectively on three core limbs, be labeled as a phase, b phase, c phase successively, each described low-voltage coil 6 all has two to lift one's head, lift one's head for two and be connected with clearing end with the initiating terminal of described low-voltage coil 6 coiling respectively, three taps of corresponding a phase, b phase, described low-voltage coil 6 initiating terminal of c phase three are marked as x, y, z respectively, and three taps of described low-voltage coil 6 clearing end are marked as a, b, c.
X, y, z tap copper bar on described low-voltage coil 6 links together, and composition " Y " connects, and then draws one and newly lifts one's head, be labeled as 0.
Described low-voltage coil 6 skin is wound with high-tension coil 7, described high-tension coil 7 adopts oxygen-free copper copper wire winding to form, copper cash is the F class F insulation wire of double glass fiber coating bag, described high-tension coil 7 structure adopts sectional circular core structure, segments is more than or equal to eight sections, the tap of tap lead is positioned at two sections, middle part, leads to described high-tension coil 7 outside terminal place respectively.
The present embodiment comprises three described high-tension coils 7, what three described high-tension coils 7 and described low-voltage coil 6a phase, b phase, c were corresponding is labeled as A phase, B phase, C phase, initiating terminal and clearing end go between respectively to described high-tension coil 7, initiating terminal is marked as A, B, C successively, clearing end is marked as X, Y, Z successively, and B and X is connected, and C and Y is connected, A and Z is connected, composition delta connection.
Described high-tension coil 7 initiating terminal A, B, C go between respectively on the high-tension insulator on the described upper clamping piece 2 being positioned at described high-tension coil 7 place.
Be provided with insulating cylinder 8 between described high-tension coil 7 and described low-voltage coil 6, described insulating cylinder 8 adopts polyester composite sheet, and the two ends up and down of described insulating cylinder 8 are stepped up by described upper cushion block 9 and described lower cushion block 10.
Described upper clamping piece 2 and described lower clamping piece 3 are arranged on described upper yoke and described lower yoke by other screw rod and core through screw rod respectively, other screw rod is in order to step up described upper clamping piece 2 and described lower clamping piece 3, core through screw rod overcoat has 3240 insulation resin pipes, make electrical isolation between itself and described unshakable in one's determination 1, then by nut check, the object of stepping up whole Double layer iron yoke is reached.
Described upper clamping piece 2 and be provided with insulating part 4 between described lower clamping piece 3 and described unshakable in one's determination 1, described insulating part 4 makes described upper clamping piece 2 and described lower clamping piece 3 insulate with described unshakable in one's determination 1 respectively, described insulating part 4 is the platy structure of unsaturated polyester glass fiber enhancing BMC die casting, there are many raised strip thickeied onboard, after installing, fillet contacts with described iron core and steps up, and non-reinforcement forms air gap and is beneficial to described 1 heat radiation unshakable in one's determination.
Described low-voltage coil 6 is provided with cushion block 9 with described high-tension coil 7 top, described low-voltage coil 6 is provided with lower cushion block 10 with described high-tension coil 7 bottom, the silicagel pad of stretching high-voltage coil and low-voltage coil is housed between upper lower cushion block and high-voltage coil and low-voltage coil respectively, clinging of silicagel pad and upper lower cushion block, stretching high-voltage coil and low-voltage coil and described insulating cylinder 8, in buffering, lower cushion block is to the pressure of high-voltage coil and low-voltage coil, alleviate the noise because of vibrations generation when high-voltage coil and low-voltage coil runs, described upper cushion block 9 offers blind hole, be connected with described upper clamping piece 2 by nail pressing, nail pressing directly can compress described upper cushion block 9, then pressure is by described upper cushion block 9, coil, described lower cushion block 10 and that whole magnetic bobbin core is formed is overall, thus compress whole high-voltage coil and low-voltage coil.
Below described unshakable in one's determination 1, some feets 11 are installed, the quantity of described feet 11 is more than or equal to two pieces, described feet 11 is positioned at the whole described foot of unshakable in one's determination 1, as total support of described unshakable in one's determination 1, insulate in described feet 11 and the described unshakable in one's determination 1 part feet joined and pad, feet insulation forms for silica gel and 3240 epoxy plates bond, such feet insulation benefit to tamp gap between described 1 lower yoke unshakable in one's determination and described feet 11, reduce vibrations, there is enough mechanical strengths and electrical strength simultaneously, the part joined at described feet 11 and described lower clamping piece 3 is connected by screw thread, make described lower clamping piece 3 as a whole with described feet 11 one-tenth, as the support of whole transformer.
Described feet 11 top is provided with blower fan 12, described low-voltage coil 6 upper surface is provided with thermostat probe, described upper clamping piece 2 is provided with probe lead wire, described upper clamping piece 2 is provided with temperature controller 13 and insulator, when thermostat probe finds transformer temperature height, described temperature controller 13 can switch on power automatically, allow described blower fan 12 work, dispel the heat, if temperature is also high, described temperature controller 13 can output alarm or trip signal, and disconnecting transformer runs.
Compared with prior art, the insulating dry type transformer of a kind of 20kV electric pressure of the present invention, this transformer is compared in national standard mark GB/T10228-2008 " Dry-Transformer Technology parameter and requirement ", about 20% is declined with capacity products no-load loss, load loss declines about 10%, add up with the minimizing of no-load loss merely, this type product of a 1000kVA every year can save power 4292 kilowatt hour compared to old product.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. the insulating dry type transformer of a 20kV electric pressure, it is characterized in that, comprise: iron core, upper clamping piece and lower clamping piece, described iron core comprises core limb, upper yoke and lower yoke, vertical and the ground of described core limb, described upper yoke and described lower yoke parallel to the ground, described core limb both sides are provided with arm-tie, are provided with insulation board between described iron core and described arm-tie;
Described skin unshakable in one's determination is wound with low-voltage coil, and described low-voltage coil skin is wound with high-tension coil, is provided with insulating cylinder between described high-tension coil and described low-voltage coil;
Described upper clamping piece and described lower clamping piece are arranged on described upper yoke and described lower yoke by other screw rod and core through screw rod respectively;
Described upper clamping piece and be provided with insulating part between described lower clamping piece and described iron core, described upper clamping piece is provided with temperature controller;
Described low-voltage coil and described high-tension coil top are provided with cushion block, and described low-voltage coil and described high-tension coil bottom are provided with lower cushion block;
Described below unshakable in one's determination is provided with some feets, and described feet top is provided with blower fan.
2. the insulating dry type transformer of a kind of 20kV electric pressure according to claim 1, is characterized in that: the upper and lower two ends of described arm-tie are provided with pin, offers some grooves in the middle of described arm-tie.
3. the insulating dry type transformer of a kind of 20kV electric pressure according to claim 1, is characterized in that: described upper cushion block offers blind hole.
4. the insulating dry type transformer of a kind of 20kV electric pressure according to claim 1, is characterized in that: described insulating part is the platy structure that unsaturated polyester glass fiber strengthens BMC die casting.
5. the insulating dry type transformer of a kind of 20kV electric pressure according to claim 1, is characterized in that: the quantity of described feet is more than or equal to two pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510596362.6A CN105185539A (en) | 2015-09-18 | 2015-09-18 | Insulation dry-type transformer of 20kV voltage class |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510596362.6A CN105185539A (en) | 2015-09-18 | 2015-09-18 | Insulation dry-type transformer of 20kV voltage class |
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| CN105185539A true CN105185539A (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510596362.6A Pending CN105185539A (en) | 2015-09-18 | 2015-09-18 | Insulation dry-type transformer of 20kV voltage class |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105448495A (en) * | 2016-01-11 | 2016-03-30 | 吴优 | High-voltage power transformer |
| CN105448496A (en) * | 2016-01-11 | 2016-03-30 | 吴优 | Dry-type power transformer |
| CN105448497A (en) * | 2016-01-11 | 2016-03-30 | 吴优 | Dry-type distribution transformer |
| CN105895338A (en) * | 2016-06-29 | 2016-08-24 | 天津市特变电工变压器有限公司 | Dry type transformer in wind power generator cabin |
| CN106504880A (en) * | 2017-01-04 | 2017-03-15 | 江苏亚威变压器有限公司 | Resin insulating dry type transformer attemperating unit |
| CN106504860A (en) * | 2017-01-04 | 2017-03-15 | 江苏亚威变压器有限公司 | Resin insulating dry type transformer base |
| CN110783069A (en) * | 2019-09-27 | 2020-02-11 | 广州市一变电气设备有限公司 | Folder with circulating water cooling function and transformer thereof |
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| CN201156464Y (en) * | 2007-12-05 | 2008-11-26 | 中国西电电气股份有限公司 | Iron core pulling board of transformer |
| JP2011082414A (en) * | 2009-10-09 | 2011-04-21 | Toshiba Corp | Gas-insulated transformer |
| CN102054564A (en) * | 2010-11-19 | 2011-05-11 | 济南济变志亨电力设备有限公司 | Iron core insulation component for dry-type transformer |
| CN202210460U (en) * | 2011-08-16 | 2012-05-02 | 江苏中联电气股份有限公司 | Pressing device of transformer coil |
| CN202585030U (en) * | 2011-12-21 | 2012-12-05 | 明珠电气有限公司 | Three-phase and three-column amorphous alloy iron core in cast molding |
| CN103971885A (en) * | 2014-04-25 | 2014-08-06 | 江苏天威变压器有限公司 | Dry type transformer |
| CN205080994U (en) * | 2015-09-18 | 2016-03-09 | 常熟市森源电气科技有限公司 | Insulating dry -type transformer of 20kV electric pressure |
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| CN2572526Y (en) * | 2002-09-28 | 2003-09-10 | 常州华迪特种变压器有限公司 | Dry type transformer |
| CN201156464Y (en) * | 2007-12-05 | 2008-11-26 | 中国西电电气股份有限公司 | Iron core pulling board of transformer |
| JP2011082414A (en) * | 2009-10-09 | 2011-04-21 | Toshiba Corp | Gas-insulated transformer |
| CN102054564A (en) * | 2010-11-19 | 2011-05-11 | 济南济变志亨电力设备有限公司 | Iron core insulation component for dry-type transformer |
| CN202210460U (en) * | 2011-08-16 | 2012-05-02 | 江苏中联电气股份有限公司 | Pressing device of transformer coil |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105448495A (en) * | 2016-01-11 | 2016-03-30 | 吴优 | High-voltage power transformer |
| CN105448496A (en) * | 2016-01-11 | 2016-03-30 | 吴优 | Dry-type power transformer |
| CN105448497A (en) * | 2016-01-11 | 2016-03-30 | 吴优 | Dry-type distribution transformer |
| CN105895338A (en) * | 2016-06-29 | 2016-08-24 | 天津市特变电工变压器有限公司 | Dry type transformer in wind power generator cabin |
| CN106504880A (en) * | 2017-01-04 | 2017-03-15 | 江苏亚威变压器有限公司 | Resin insulating dry type transformer attemperating unit |
| CN106504860A (en) * | 2017-01-04 | 2017-03-15 | 江苏亚威变压器有限公司 | Resin insulating dry type transformer base |
| CN110783069A (en) * | 2019-09-27 | 2020-02-11 | 广州市一变电气设备有限公司 | Folder with circulating water cooling function and transformer thereof |
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Application publication date: 20151223 |