CN208922880U - One kind can self-healing transformer - Google Patents

Abstract

It can self-healing transformer the utility model discloses one kind, including iron core, interior winding, outer winding, self-healing is insulated between interior winding self-healing insulation and inside and outside winding, the interior winding self-healing insulation sleeve is on iron core, the interior winding is set in interior winding self-healing insulation, self-healing insulation sleeve is on interior winding between the inside and outside winding, the outer winding is sleeved between inside and outside winding in self-healing insulation, the interior winding self-healing insulation includes insulating layer, heat-conducting layer, transient resistance curtain layer and earth cable, the heat-conducting layer is enclosed on transient resistance curtain layer, the insulating layer is enclosed on heat-conducting layer, one end of the earth cable and transient resistance curtain layer are electrically connected, self-healing insulation is identical as the structure that interior winding self-healing is insulated between the inside and outside winding.The insulation effect of the utility model is good as a result, substantially reduces by the probability of high electrical breakdown, and can have certain " self-healing " ability, and structure is simple, and cost of manufacture is lower, practical.

Description

One kind can self-healing transformer

Technical field

The utility model relates to design of transformer fields, can self-healing transformer more particularly to one kind.

Background technique

Currently, a large amount of Transformers are mounted on various outdoor environments, domestic many places are the active areas of thunder and lightning, Some local statistics thunderstorm days in year are even up to tens days or more.The transformer damaged by lightning impulse is very more, in addition all kinds of Switching overvoltage or the transformer of resonance overvoltage damage are also countless.

To solve the above-mentioned problems, its internal low-voltage winding can be set in many transformers now in the current market It is set to zigzag structure, makes it when being struck by lightning or overvoltage, winding can offset a part impact to reduce damage.But It is that the manufacturing process of this class formation is complicated, and cost of manufacture is high, while the material consumptions such as electromagnetic wire for increasing about 12%, transformer Load loss correspondinglys increase, and it only can defend external lightning stroke or overvoltage, to operation or resonance overvoltage, resists effect Fruit is poor.In addition, above-mentioned transformer is just difficult to restore once insulating breakdown, maintenance and replacement cost are high.

Utility model content

The purpose of this utility model is to provide one kind can self-healing transformer, can solve the above problem in one or It is multiple.

One aspect according to the present utility model, provide one kind can self-healing transformer, including iron core, interior winding, outside around Group, interior winding self-healing insulation inside and outside winding between self-healing insulate, the interior winding self-healing insulation sleeve on iron core, it is described in around Group is set in interior winding self-healing insulation, and on interior winding, the outer winding is sleeved on self-healing insulation sleeve between the inside and outside winding Between inside and outside winding in self-healing insulation, the interior winding self-healing insulation includes insulating layer, heat-conducting layer, transient resistance curtain layer and ground connection electricity Cable, the heat-conducting layer are enclosed on transient resistance curtain layer, and the insulating layer is enclosed on heat-conducting layer, one end of the earth cable and wink Power transformation hinders curtain layer and is electrically connected, and self-healing insulation is identical as the structure that interior winding self-healing is insulated between the inside and outside winding.

The beneficial effects of the utility model are: in the utility model, by winding self-healing insulation in being arranged as iron core Insulation between interior winding, by self-healing insulation between inside and outside winding is arranged as the insulation between interior winding and outer winding.And By the way that heat-conducting layer is arranged in self-healing insulation between interior winding self-healing insulation and inside and outside winding, when in use in order to the utility model The heat of generation scatters, and avoids thermal breakdown, and transient electrical resistance layer is arranged, and the utility model, which on the one hand can be improved, to be held On the other hand the voltage received when transient electrical resistance layer is when by high voltage, can obtain electric conductivity, high voltage is passed through ground connection Cable is led onto ground, to avoid the damage of the utility model, generates " lightning rod " effect, and after high voltage disappearance, wink Variable resistance layer can be restored to high-impedance state, realize " self-healing ".The insulation effect of the utility model is good as a result, substantially reduces high The probability of voltage breakdown, and can have certain " self-healing " ability, structure is simple, and cost of manufacture is lower, practical.

In some embodiments, the transient resistance curtain layer includes transient resistance piece and housing, the transient resistance piece Spaced set is put in outside.Transient resistance piece has insulation recovery property, can guarantee effective work of transient resistance curtain layer, and Its spaced set can be homogenized its stress.

In some embodiments, the transient resistance piece is zinc oxide resistance sheet.Zinc oxide resistance sheet has high voltage Conducting, the conduction property of low-voltage partition, and its insulation recovery is strong, is widely used on lightning rod, is used as transient resistance The strong applicability of piece.

In some embodiments, oil duct is equipped in the heat-conducting layer.Oil can be led in oil duct, to further increase heat-conducting layer Heat dissipation effect.

In some embodiments, multiple high thermal conductivity damper bars are equipped in the heat-conducting layer.The setting of high thermal conductivity damper bar The thermal conductivity of heat-conducting layer can be effectively improved.

In some embodiments, the insulating layer is C grades of latticed insulating layers.It is excellent to can guarantee that insulating layer has as a result, Elegant temperature tolerance, and latticed heat dissipation performance is more preferable, can be further improved the heat dissipation of the utility model.

Detailed description of the invention

Fig. 1 be the utility model a kind of embodiment can self-healing transformer structural schematic diagram cross-sectional view.

Fig. 2 be Fig. 1 can self-healing transformer interior winding self-healing insulation top view.

Fig. 3 be Fig. 1 can self-healing transformer transient resistance curtain layer expanded view.

In figure: 1. iron cores, winding in 2., 3. outer windings, winding self-healing insulation in 4., self-healing insulation between winding inside and outside 5., 11. insulating layer, 21. heat-conducting layers, 31. transient resistance curtain layers, 41. earth cables, 311. transient resistance pieces, 312. housings, 211. Oil duct and 212. high thermal conductivity damper bars.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing.

With reference to Fig. 1, Fig. 2 and Fig. 3, one kind of the utility model can self-healing transformer, including iron core 1, interior winding 2, outside around Self-healing insulation 5 between group 3, interior winding self-healing insulation 4 and inside and outside winding.

Interior winding self-healing insulation 4 is sleeved on iron core 1, and interior winding 2 is set in interior winding self-healing insulation 4, between inside and outside winding Self-healing insulation 5 is sleeved on interior winding 2, and outer winding 3 is sleeved between inside and outside winding in self-healing insulation 5.

Self-healing insulation 5 is identical as the structure of interior winding self-healing insulation 4 between inside and outside winding, then self-healing insulation 5 between inside and outside winding It include insulating layer 11, heat-conducting layer 21, transient resistance curtain layer 31 and earth cable 41, heat-conducting layer 21 with interior winding self-healing insulation 4 It encloses on transient resistance curtain layer 31, insulating layer 11 is enclosed on heat-conducting layer 21, one end of earth cable 41 and transient resistance curtain layer 31 It is electrically connected.

And transient resistance curtain layer 31 includes transient resistance piece 311 and housing 312, transient resistance piece 311 is muti-piece, muti-piece wink Become resistor disc 311 to be equidistantly fixedly mounted on housing 312.Transient resistance piece 311 can be usually used in production lightning-arrest to be commercially available The zinc oxide resistance sheet of needle, and the housing 312 of composite silicone rubber production can be used in housing 312.

Longitudinal oil duct 211 is equipped in order to further increase the heat dissipation effect of heat-conducting layer 21, in heat-conducting layer 21, in oil duct 211 It can be passed through oil, and be additionally provided with multiple high thermal conductivity damper bars in heat-conducting layer 21

Insulating layer 11 then selects material of the class of insulation at C grades or more, such as the latticed insulating layer of glass fibre production, To guarantee that insulating layer 11 can bear higher temperature, and there is preferable heat dissipation effect.

When the utility model is used, the other end of earth cable 41 can be electrically connected with ground, and can lead in oil duct 211 Enter oil, then in winding self-healing insulation 4 can as the insulation between interior winding 2 and iron core 1, and between inside and outside winding self-healing insulation 5 energy As the insulation between outer winding 3 and interior winding 2, meanwhile, between interior winding self-healing insulation 4 and inside and outside winding in self-healing insulation 5 Heat-conducting layer 21 can play good heat spreading function in utility model works, avoid the utility model that " thermal breakdown " occurs.

And when the utility model is when the high voltages such as being struck by lightning, and 31 meeting under the influence of high voltage of transient resistance curtain layer Conductive, then high voltage can be oriented to earth cable 41 by transient resistance curtain layer 31, then be imported by earth cable 41 Greatly, the utility model is damaged to avoid above-mentioned high voltage, and after high voltage elimination, transient resistance curtain layer 31 can be High state of insulation is reverted in short time, i.e. realization " self-healing ", in order to which self-healing is exhausted between interior winding self-healing insulation 4 and inside and outside winding Edge 5 still has high insulating property.

Above-described is only some embodiments of the utility model.For those of ordinary skill in the art, Without departing from the concept of the present invention, various modifications and improvements can be made, these belong to practical Novel protection scope.

Claims (6)

1. one kind can self-healing transformer, which is characterized in that including iron core, interior winding, outer winding, interior winding self-healing insulation and inside and outside Self-healing is insulated between winding, and on iron core, the interior winding is set in interior winding self-healing insulation the interior winding self-healing insulation sleeve, Self-healing insulation sleeve is on interior winding between the inside and outside winding, and the outer winding is sleeved between inside and outside winding in self-healing insulation, institute Stating interior winding self-healing insulation includes insulating layer, heat-conducting layer, transient resistance curtain layer and earth cable, and the heat-conducting layer is enclosed in transient electrical It hinders on curtain layer, the insulating layer is enclosed on heat-conducting layer, and one end of the earth cable and transient resistance curtain layer are electrically connected, described Self-healing insulation is identical as the structure that interior winding self-healing is insulated between inside and outside winding.

2. one kind according to claim 1 can self-healing transformer, which is characterized in that the transient resistance curtain layer includes transition Resistor disc and housing, the transient resistance piece spaced set are put in outside.

3. one kind according to claim 2 can self-healing transformer, which is characterized in that the transient resistance piece is zinc oxide electricity Hinder piece.

4. one kind according to claim 1 can self-healing transformer, which is characterized in that be equipped with oil duct in the heat-conducting layer.

5. one kind according to claim 4 can self-healing transformer, which is characterized in that be equipped with multiple high lead in the heat-conducting layer Hot damper bar.

6. one kind according to claim 1 can self-healing transformer, which is characterized in that the insulating layer is C grade latticed exhausted Edge layer.