WO2019196037A1 - Transformer - Google Patents

Transformer Download PDF

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Publication number
WO2019196037A1
WO2019196037A1 PCT/CN2018/082714 CN2018082714W WO2019196037A1 WO 2019196037 A1 WO2019196037 A1 WO 2019196037A1 CN 2018082714 W CN2018082714 W CN 2018082714W WO 2019196037 A1 WO2019196037 A1 WO 2019196037A1
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WO
WIPO (PCT)
Prior art keywords
transformer
winding
iron yoke
voltage winding
core
Prior art date
Application number
PCT/CN2018/082714
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French (fr)
Chinese (zh)
Inventor
韩强
冯爱军
封春波
刘卫东
魏祥
董永熠
王科平
Original Assignee
江苏中天伯乐达变压器有限公司
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Application filed by 江苏中天伯乐达变压器有限公司 filed Critical 江苏中天伯乐达变压器有限公司
Priority to PCT/CN2018/082714 priority Critical patent/WO2019196037A1/en
Publication of WO2019196037A1 publication Critical patent/WO2019196037A1/en
Priority to ZA2020/01895A priority patent/ZA202001895B/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections

Definitions

  • the invention relates to a power distribution device, and in particular to a transformer.
  • a transformer is a device that uses the principle of electromagnetic induction to change the AC voltage.
  • the transformer generates heat during operation.
  • the transformer is filled with mineral oil to dissipate heat.
  • mineral oil has the characteristics of low ignition point and slow degradation time, it will limit the scope of use of the transformer.
  • the current transformer windings generally use aluminum wire or copper wire, and the aluminum wire has low resistance to short circuit, and the copper wire has large loss, high noise, and high cost. Therefore, existing transformers need to be improved.
  • the invention provides a transformer comprising a core and a winding, the winding comprising a low voltage winding disposed outside the cylinder of the core, a high voltage winding disposed outside the low voltage winding, the low voltage winding is wound by an aluminum zirconium alloy foil
  • the high voltage winding is wound by an aluminum zirconium alloy wire
  • an oil passage is disposed between the low voltage winding and the iron core and/or between the low voltage winding and the high voltage winding.
  • the oil passage is filled with vegetable oil.
  • the inner diameter of the oil passage is increased by a first predetermined ratio than the inner diameter of the oil passage of the transformer using the mineral oil.
  • the preset ratio is 20%.
  • the transformer is a three-phase transformer, and the transformer further includes an upper iron yoke pad that is pressed against the top of the winding, a lower iron yoke pad that is pressed against the bottom of the winding, and the core is pressed against An upper clamping member of the upper iron yoke, and a lower clamping member for pressing the lower iron yoke of the iron core, the upper clamping member is disposed above the upper iron yoke pad, and the lower clamping member is disposed on the lower iron Below the yoke pad, a silicon steel sheet is disposed between the upper clip and the upper yoke pad, and between the lower clip and the lower yoke pad, respectively.
  • the upper clamping member includes a first upper clamping member and a second upper clamping member respectively disposed on two sides of the upper iron yoke
  • the lower clamping member includes first and second sides respectively disposed on the lower iron yoke a lower clip and a second lower clip between the first upper clip and the upper yoke pad, between the second upper clip and the upper yoke pad,
  • a silicon steel sheet is disposed between the first lower clip and the lower iron yoke pad, and between the second lower clip and the lower iron yoke block, respectively.
  • the silicon steel sheet has a thickness of 5 mm.
  • an iron yoke spacer is disposed between the upper iron yoke of the core and the winding, and between the lower iron yoke of the core and the winding, and at least one end of the iron yoke spacer is provided There is a gap, and the corresponding column is at least partially disposed in the notch.
  • the notch matches the shape of the edge of the cylinder.
  • the core is made of a plurality of silicon steel sheets, and a plurality of struts and/or a plurality of struts are disposed between the core of the core and the low voltage winding.
  • the zirconium alloy foil and/or the zirconium alloy wire comprises, by weight percentage, the following components: zirconium 1.6%, lanthanum 0.1-0.3%, lanthanum 0.1-0.3%, iron 0.1%, silicon 0.05%, The rest is aluminum.
  • the low-voltage winding of the transformer provided by the invention is wound by aluminum-zirconium alloy foil, and the high-voltage winding is wound by aluminum-zirconium alloy wire, and is cooled by vegetable oil, and has short circuit resistance and performance.
  • Excellent, energy-saving and environmentally friendly, relatively low cost and the low-voltage winding made of aluminum-zirconium alloy foil can improve the oil flow of the transformer and improve the low-voltage winding.
  • Fig. 1 shows a front view of a transformer of the present invention.
  • Figure 2 shows a schematic view of the structure of the body.
  • Fig. 3 is a cross-sectional view taken along line III-III of Fig. 2.
  • Fig. 4 shows a schematic structural view of a portion of Fig. 3.
  • Figure 5 shows a graph of yield strength versus temperature for aluminum zirconium alloys, copper and aluminum.
  • Figure 6 shows a top view of the body.
  • Fig. 7 is a schematic view showing the structure of an iron yoke.
  • Upper clamp 52 Lower clamp 53 Silicon steel sheet 54 First upper clamp 521 Second upper clamp 522 First lower clamp 531 Second lower clamp 532 Upper iron yoke partition 60 Upper iron yoke 61 Lower iron yoke partition 62 Lower iron yoke 63 gap 64
  • Fig. 1 is a front view showing the structure of a transformer 100 according to an embodiment of the present invention.
  • the transformer 100 may be an oil immersed transformer or a dry transformer or a gas insulated transformer.
  • the transformer 100 may also be a single phase transformer or a three phase transformer.
  • an oil-immersed three-phase transformer is taken as an example for description. It should be understood that the technical solution provided by the present invention can be correspondingly applied to other types of transformers.
  • the transformer 100 may include a fuel tank 110 and a body 120 disposed in the oil tank 110 (the structure of the body 120 may be referred to FIG. 2).
  • An oil level gauge 31, an oil drain pipe 32, a low pressure bushing 33, and a high pressure bushing 34 may be disposed outside the fuel tank 110.
  • the oil level gauge 31 may be used to view the amount of oil in the fuel tank 110, and the oil drain pipe 32 may be used to The cooling oil in the oil tank 110 is discharged.
  • the body 120 includes a core 10 and a winding 20 .
  • the core 10 can be made of silicon steel sheet, has low no-load loss, and can even reach the 14-type no-load loss level, and the no-load current and no-load noise are far superior to the standard requirements.
  • the core 10 may include three cylinders 11, an upper iron yoke 12 connected to one end of the three cylinders 11, and a lower iron yoke 13 connected to the other end of the three cylinders 11.
  • a winding 20 is disposed outside each of the cylinders 11.
  • Each of the windings 20 may include a low voltage winding 21 and a high voltage winding 22, wherein the low voltage winding 21 is made of an aluminum zirconium alloy foil, and the high voltage winding 22 is made of an aluminum zirconium alloy wire.
  • the low voltage winding 21 is disposed outside the cylinder 11
  • the high voltage winding 22 is disposed outside the low voltage winding 21 .
  • the low voltage bushing 33 is connected to the low voltage winding 21, and the high voltage bushing 34 is connected to the high voltage winding 22.
  • a layer of shroud 30 may also be disposed between the low voltage winding 21 and the column 11, and the shroud 30 spaces the low voltage winding 21 and the column 11 apart.
  • An oil passage 40 is provided between the low voltage winding 21 and the cylinder 11 and/or between the low voltage winding 21 and the high voltage winding 22, and the oil passage 40 may be in communication with the oil tank 110.
  • an oil passage 40 is disposed between the low voltage winding 21 and the cylinder 11 and between the low voltage winding 21 and the high voltage winding 22, and is disposed on
  • the oil passage between the low voltage winding 21 and the cylinder 11 may be a low pressure half oil passage 41
  • the oil passage 40 disposed between the low pressure winding 21 and the high voltage winding 22 may include a main air passage 42 and a high pressure half oil passage 43.
  • the low pressure half oil passage 41 may be disposed between the low voltage winding 21 and the shroud 30, and the low pressure half oil passage 41 is adjacent to the inner side of the low voltage winding 21.
  • the main air passage 42 is adjacent to the outer side of the low voltage winding 21 and the high pressure half oil passage 43 is adjacent to the inner side of the high voltage winding 22.
  • a plurality of struts 35 and/or a plurality of struts 36 may be provided through the struts 35 and/or the struts 36.
  • the gap between the cylinder 11 and the low voltage winding 21 can be filled, and the winding 20 can be fastened outside the cylinder 11 to improve the bonding strength of the winding 20 and the cylinder 11.
  • the gusset 35 and/or the struts 36 may be disposed between the pillar 11 and the fascia 30.
  • the oil tank 110 and the oil passage 40 are filled with vegetable oil, which may be edible vegetable oil, or may be configured by adding a food grade performance enhancing additive to the edible vegetable oil.
  • the vegetable oil may be one or more of soybean oil, rapeseed oil, etc. It should be understood that the vegetable oil may also include other species.
  • Table 1 compares the physical and chemical properties of vegetable oil with high-flame point mineral oil and silicone liquid.
  • Table 2 shows the comparison of electrical properties between vegetable oil and high-flame point mineral oil and silicone liquid.
  • Transformer 100 with vegetable oil vegetable oil with flash point >300 ° C, ignition point >350 ° C, belongs to K-class hard fuel, twice as much as mineral oil, the risk of fire and explosion, far lower than traditional mineral oil transformer, so more Safety; vegetable oil has a degradation rate of over 98% in a short period of time, does not contain any harmful substances, and the carbon emission during the whole life cycle is only 1/64 of that of mineral oil. It will not pollute the environment and will not endanger human health.
  • Cleaner vegetable oil has excellent moisture resistance, high dielectric constant, delays insulation aging, prolongs insulation life, good compatibility, strong overload capacity, can reduce transformer noise, effectively improve the oxidation resistance of transformer 100, arc extinguishing performance Better than mineral oil, it is superior in performance and lower in cost.
  • the vegetable oil has a higher kinematic viscosity than the mineral oil, and therefore, the heat dissipation performance of the transformer is lowered; the low-voltage winding 21 wound by the aluminum-zirconium alloy foil is applied to the transformer for heat dissipation of the vegetable oil, and Compared with the wire winding, the oil flow of the transformer can be better improved, and the heat dissipation performance of the low voltage winding 21 can be improved. Moreover, since the low voltage winding 21 wound by the foil is used, the axial short-circuiting force is small, and the short circuit of the low voltage winding 21 can be further improved. ability.
  • the aluminum zirconium alloy foil and/or the zirconium alloy wire comprises, by weight percentage, the following components: zirconium 1.6%, niobium 0.1-0.3%, niobium 0.1-0.3%, iron 0.1%, silicon 0.05%, the remaining aluminum and trace impurities, adding zirconium, iron and silicon to pure aluminum can significantly improve the mechanical strength and heat resistance of aluminum.
  • the addition of niobium and tantalum can further strengthen the mechanical strength and heat resistance, and Can improve the conductivity.
  • the yield strength of the aluminum-zirconium alloy is higher than that of the annealed pure aluminum, the cold-drawn pure aluminum, and even higher than the annealed copper in a certain temperature range, and the aluminum-zirconium alloy can be seen.
  • the yield strength is superior to ordinary pure aluminum and is superior to copper wire in a certain temperature range.
  • the winding made of aluminum zirconium alloy has better conductivity, heat resistance and short circuit resistance than the winding made of ordinary aluminum wire, compared with the winding made of ordinary copper wire. It has the advantages of low noise and more economical.
  • the inner diameter range of the oil passage of a transformer using mineral oil is calculated from its transformer capacity and voltage.
  • the inner diameter of the oil passage 40 may be designed to be increased by a preset ratio than the inner diameter of the oil passage of the transformer using the mineral oil in the prior art.
  • the preset is preset.
  • the ratio is 20%. It should be understood that the increase of 20% may be 20% or may be within a certain deviation range of 20%.
  • the preset ratio is 20% ⁇ 2%. , that is, the preset ratio is 18%-22%.
  • the increase in the inner diameter of the oil passage 40 can increase the fluidity of the vegetable oil and increase the heat dissipation area of the winding 20, thereby improving the heat dissipation performance of the transformer 100 and reducing the temperature rise of the transformer 100. If the inner diameter of the oil passage 40 is increased excessively (for example, 30% or more) than the inner diameter of the oil passage of the transformer using the mineral oil, the impedance of the transformer 100 is affected, which is disadvantageous for improving the performance of the transformer 100. In this embodiment, Preferably, the inner diameter of the oil passage of the existing transformer using mineral oil is increased by 20%.
  • the body 120 may further include an upper iron yoke block 50, a lower iron yoke block 51, an upper clip 52, a lower clip 53 and a silicon steel sheet 54, the upper clip 52 is disposed above the upper iron yoke pad 50 and presses the silicon steel sheet 54 and the upper iron yoke pad 50 against the winding 20, and the lower clip 53 is disposed on the lower iron yoke block Below the 51, the silicon steel sheet 54 and the lower iron yoke block 51 are pressed against the winding 20.
  • the thickness of the silicon steel sheet 54 is 5 mm. It should be understood that the thickness of the silicon steel sheet 54 may be 5 mm within a certain range of deviation, such as 5 ⁇ 0.5 mm. It should be understood that the silicon steel The sheet 54 can also be selected to have a corresponding thickness depending on actual needs.
  • a silicon steel sheet 54 is disposed between the clips 52, 53 and the iron yoke pads 50, 51, which can form a three-phase common magnetic shunt, which changes the traditional magnetic path direction and can greatly reduce the no-load loss and load loss, which is beneficial to Improve the performance of the transformer 100.
  • the side edges of the upper iron yoke pad 50 may be fitted to the side edges of the upper iron yoke 12, and the lower iron yoke pads 51 are attached.
  • the side edges may be attached to the side edges of the lower iron yoke 13.
  • the upper clip 52 may include a first upper clip 521 and a second upper clip 522
  • the lower clip 53 may include a first lower clip 531 and a second lower clip 532.
  • a silicon steel sheet 54 may be disposed between each of the upper clamp members and the corresponding iron yoke.
  • the first upper clip 521 and the second upper clip 522 are disposed on both sides of the upper iron yoke 12, and both of them can be bolted and clamped to the silicon steel sheet 54 and the upper iron yoke 12.
  • the first lower clip 531 and the second lower clip 532 are disposed on both sides of the lower iron yoke 13, and the two may be fixed by bolts to clamp the silicon steel sheet 54 and the lower iron yoke 13 .
  • the body 120 may further include an upper iron yoke partition 60, an upper iron yoke plate 61, a lower iron yoke partition 62, and a lower iron yoke plate 63, the upper iron yoke partition 60 and the upper iron yoke
  • the strut 61 is pressed between the winding 20 and the upper iron yoke 12, and the lower iron yoke partition 62 and the lower iron yoke 63 are pressed against the winding 20 and the lower iron yoke 13 between.
  • the upper iron yoke plate 61 is disposed above the upper iron yoke partition 60, and the lower iron yoke plate 63 is disposed below the lower iron yoke partition 62.
  • At least one end of the iron yoke spacers 60 and 61 is provided with a notch 64.
  • the two ends of the iron yoke spacers 60 and 61 are oppositely provided with a notch 64.
  • 64 is roughly I-shaped.
  • the notch 64 may match the shape of the edge of the corresponding cylinder 11 , and the corresponding column 11 is at least partially disposed in the notch 64 .
  • the cross-sectional shape of the cylinder 11 may be a racetrack shape, and the notch 64 may be a raceway-shaped arcuate notch.
  • the notch 64 can The sides of the cylinder 11 are fitted together.
  • the iron yoke spacers 60 and 61 of the present embodiment have a larger bonding area, a better inductive withstand voltage, a larger supporting area, and higher strength, and can better isolate the iron yokes 12, 13 and the winding 20, and have excellent resistance. Short circuit capability.
  • the exemplary transformer, core material B20R070; core cross section: 197.315 cm 2 ; core weight: 490 kg; low voltage winding material: aluminum zirconium alloy foil; high voltage winding material: aluminum zirconium alloy wire; low voltage winding turns: 31 ⁇ ; Winding turns: 1409 ⁇ ; low-voltage wire cross-sectional area: 196.1mm 2 ; high-voltage wire cross-sectional area: 10.7mm 2 ; low-voltage winding weight: 60kg; high-voltage winding weight: 147kg; cooling medium: vegetable oil.
  • the exemplary transformer, no-load loss: ⁇ 0.41kW, load loss: ⁇ 4.52kW thermal stability check maximum temperature 165 ° C, dynamic stability check winding maximum stress 78Mpa, are less than aluminum alloy heat and strength allowable value, And there is enough safety margin.
  • Table 4 compares the transformer, mineral oil transformer and dry transformer of the present embodiment as follows.
  • the transformer of the present invention has superior performance compared to the conventional transformer.

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  • Power Engineering (AREA)
  • Transformer Cooling (AREA)

Abstract

The present invention provides a transformer, comprising a core and a winding. The winding comprises a low-voltage winding provided outside a column body of the core, and a high-voltage winding provided outside the low-voltage winding. The low-voltage winding is formed by winding an aluminum-zirconium alloy foil, and the high-voltage winding is formed by an aluminum-zirconium alloy wire. An oil channel is provided between the low-voltage winding and the core and/or between the low-voltage winding and the high-voltage winding. The oil channel is filled with vegetable oil. The transformer of the present invention has good short-circuit resistance and excellent performance, is energy-saving and environment-friendly, and features relatively low costs.

Description

变压器transformer 技术领域Technical field
本发明涉及一种配电设备，尤其涉及一种变压器。The invention relates to a power distribution device, and in particular to a transformer.
背景技术Background technique
本部分旨在为权利要求书中陈述的本发明的实施方式提供背景或上下文。此处的描述不因为包括在本部分中就承认是现有技术。This section is intended to provide a background or context for the embodiments of the invention set forth in the claims. The description herein is not admitted to be prior art as it is included in this section.
变压器是利用电磁感应的原理来改变交流电压的装置。变压器在工作中会产生热量，为了方便于变压器的散热，会在变压器内填充矿物油来散热。但是由于矿物质油具有燃点较低、降解时间慢的特点，会限制变压器的使用范围。另外，目前的变压器绕组一般采用铝线或者铜线，铝线的抗短路能力比较低，而铜线的损耗大、噪音大、而且费用昂贵。因此，现有的变压器有待改进。A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The transformer generates heat during operation. In order to facilitate the heat dissipation of the transformer, the transformer is filled with mineral oil to dissipate heat. However, because mineral oil has the characteristics of low ignition point and slow degradation time, it will limit the scope of use of the transformer. In addition, the current transformer windings generally use aluminum wire or copper wire, and the aluminum wire has low resistance to short circuit, and the copper wire has large loss, high noise, and high cost. Therefore, existing transformers need to be improved.
发明内容Summary of the invention
有鉴于此，有必要提供一种变压器，抗短路能力好、性能优越、节能环保、造价相对较低。In view of this, it is necessary to provide a transformer with good short circuit resistance, superior performance, energy saving and environmental protection, and relatively low cost.
本发明提供的一种变压器，包括铁心和绕组，所述绕组包括设置于所述铁心的柱体外的低压绕组、设于所述低压绕组外的高压绕组，所述低压绕组采用铝锆合金箔绕制而成，所述高压绕组采用铝锆合金线绕制而成，在所述低压绕组与所述铁心之间和/或在所述低压绕组与所述高压绕组之间设置有油道，所述油道内填充有植物油。The invention provides a transformer comprising a core and a winding, the winding comprising a low voltage winding disposed outside the cylinder of the core, a high voltage winding disposed outside the low voltage winding, the low voltage winding is wound by an aluminum zirconium alloy foil The high voltage winding is wound by an aluminum zirconium alloy wire, and an oil passage is disposed between the low voltage winding and the iron core and/or between the low voltage winding and the high voltage winding. The oil passage is filled with vegetable oil.
进一步的，所述油道的内径比现有采用矿物油的变压器的油道的 内径加大第一预设比例。Further, the inner diameter of the oil passage is increased by a first predetermined ratio than the inner diameter of the oil passage of the transformer using the mineral oil.
进一步的，所述预设比例为20％。Further, the preset ratio is 20%.
进一步的，所述变压器为三相变压器，所述变压器还包括抵压于所述绕组顶部的上铁轭垫块、抵压于所述绕组底部的下铁轭垫块、抵压所述铁心的上铁轭的上夹件、以及抵压所述铁心的下铁轭的下夹件，所述上夹件设于所述上铁轭垫块上方，所述下夹件设于所述下铁轭垫块的下方，在所述上夹件和上铁轭垫块之间、在所述下夹件和所述下铁轭垫块之间分别设置有硅钢片。Further, the transformer is a three-phase transformer, and the transformer further includes an upper iron yoke pad that is pressed against the top of the winding, a lower iron yoke pad that is pressed against the bottom of the winding, and the core is pressed against An upper clamping member of the upper iron yoke, and a lower clamping member for pressing the lower iron yoke of the iron core, the upper clamping member is disposed above the upper iron yoke pad, and the lower clamping member is disposed on the lower iron Below the yoke pad, a silicon steel sheet is disposed between the upper clip and the upper yoke pad, and between the lower clip and the lower yoke pad, respectively.
进一步的，所述上夹件包括分别设于所述上铁轭两侧的第一上夹件和第二上夹件，所述下夹件包括分别设于所述下铁轭两侧的第一下夹件和第二下夹件，在所述第一上夹件与所述上铁轭垫块之间、所述第二上夹件与所述上铁轭垫块之间、所述第一下夹件与所述下铁轭垫块之间、所述第二下夹件与所述下铁轭垫块之间均分别设置有硅钢片。Further, the upper clamping member includes a first upper clamping member and a second upper clamping member respectively disposed on two sides of the upper iron yoke, and the lower clamping member includes first and second sides respectively disposed on the lower iron yoke a lower clip and a second lower clip between the first upper clip and the upper yoke pad, between the second upper clip and the upper yoke pad, A silicon steel sheet is disposed between the first lower clip and the lower iron yoke pad, and between the second lower clip and the lower iron yoke block, respectively.
进一步的，所述硅钢片的厚度为5mm。Further, the silicon steel sheet has a thickness of 5 mm.
进一步的，所述铁心的上铁轭的与所述绕组之间、以及所述铁心的下铁轭与所述绕组之间均设置有铁轭隔板，所述铁轭隔板的至少一端设有缺口，相应的所述柱体至少部分地设于所述缺口内。Further, an iron yoke spacer is disposed between the upper iron yoke of the core and the winding, and between the lower iron yoke of the core and the winding, and at least one end of the iron yoke spacer is provided There is a gap, and the corresponding column is at least partially disposed in the notch.
进一步的，所述缺口与所述柱体的边缘形状相配。Further, the notch matches the shape of the edge of the cylinder.
进一步的，所述铁心由若干个硅钢片制成，在所述铁心的柱体与所述低压绕组之间设置有若干的撑板和/或若干的撑条。Further, the core is made of a plurality of silicon steel sheets, and a plurality of struts and/or a plurality of struts are disposed between the core of the core and the low voltage winding.
进一步的，所述锆合金箔和/或所述锆合金线按照重量百分比计，包括以下组分：锆1.6％、镧0.1-0.3％、铈0.1-0.3％、铁0.1％、硅0.05％、余下为铝。Further, the zirconium alloy foil and/or the zirconium alloy wire comprises, by weight percentage, the following components: zirconium 1.6%, lanthanum 0.1-0.3%, lanthanum 0.1-0.3%, iron 0.1%, silicon 0.05%, The rest is aluminum.
与现有的变压器相比，本发明提供的变压器的低压绕组采用铝锆 合金箔绕制而成，高压绕组采用铝锆合金线绕制而成，并采用植物油散热，具有抗短路能力好、性能优越、节能环保、造价相对较低的优点，而且采用铝锆合金箔绕制而成的低压绕组在与植物油散热，与线绕相比，能够更好地改善变压器的油流，提高低压绕组的散热性能，而且，由于采用箔绕的低压绕组，幅向短路力小，能够进一步地提高低压绕组的抗短路能力。Compared with the existing transformer, the low-voltage winding of the transformer provided by the invention is wound by aluminum-zirconium alloy foil, and the high-voltage winding is wound by aluminum-zirconium alloy wire, and is cooled by vegetable oil, and has short circuit resistance and performance. Excellent, energy-saving and environmentally friendly, relatively low cost, and the low-voltage winding made of aluminum-zirconium alloy foil can improve the oil flow of the transformer and improve the low-voltage winding. The heat dissipation performance, and, due to the use of a foil-wound low-voltage winding, the amplitude short-circuiting force is small, and the short-circuit resistance of the low-voltage winding can be further improved.
附图说明DRAWINGS
为了更清楚地说明本发明实施例技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the present invention. For the ordinary technicians, other drawings can be obtained based on these drawings without any creative work.
图1示出了本发明的变压器的主视图。Fig. 1 shows a front view of a transformer of the present invention.
图2示出了器身的结构示意图。Figure 2 shows a schematic view of the structure of the body.
图3示出了图2的III-III剖视图。Fig. 3 is a cross-sectional view taken along line III-III of Fig. 2.
图4示出了图3的部分的结构示意图。Fig. 4 shows a schematic structural view of a portion of Fig. 3.
图5示出了铝锆合金、铜及铝的屈服强度与温度的曲线图。Figure 5 shows a graph of yield strength versus temperature for aluminum zirconium alloys, copper and aluminum.
图6示出了器身的俯视图。Figure 6 shows a top view of the body.
图7示出了铁轭撑板的结构示意图。Fig. 7 is a schematic view showing the structure of an iron yoke.
主要元件符号说明Main component symbol description
变压器 transformer 100100
油箱 tank 110110
器身Body 120120
铁心 core 1010
绕组 Winding 2020
围板Coaming 3030
油道 Oil channel 4040
柱体 Cylinder 1111
上铁轭 Upper iron yoke 1212
下铁轭 Lower iron yoke 1313
低压绕组Low voltage winding 21twenty one
高压绕组High voltage winding 22twenty two
油位计 Oil level gauge 3131
排油管 Oil drain pipe 3232
低压套管 Low pressure casing 3333
高压套管 High voltage bushing 3434
撑板 Stretch 3535
撑条 Strut 3636
低压半油道Low pressure half oil passage 4141
主空道 Main airway 4242
高压半油道High pressure half oil passage 4343
上铁轭垫块Upper iron yoke block 5050
下铁轭垫块Lower iron yoke block 5151
上夹件 Upper clamp 5252
下夹件 Lower clamp 5353
硅钢片 Silicon steel sheet 5454
第一上夹件First upper clamp 521521
第二上夹件Second upper clamp 522522
第一下夹件First lower clamp 531531
第二下夹件Second lower clamp 532532
上铁轭隔板Upper iron yoke partition 6060
上铁轭撑板 Upper iron yoke 6161
下铁轭隔板Lower iron yoke partition 6262
下铁轭撑板 Lower iron yoke 6363
缺口 gap 6464
如下具体实施方式将结合上述附图进一步说明本发明。The invention will be further illustrated by the following detailed description in conjunction with the accompanying drawings.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。可以理解，附图仅提供参考与说明用，并非用来对本发明加以限制。附图中显示的连接仅仅是为便于清晰描述，而并不限定连接方式。The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. It is to be understood that the appended drawings are not intended to The connections shown in the figures are only for the sake of clarity and are not intended to be limiting.
需要说明的是，当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to another component or a central component can be present at the same time. All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention.
图1示出了本发明一实施方式的变压器100的结构主视图。应当理解的是，所述变压器100可以是油浸式变压器，也可以是干式变压器或者气体绝缘变压器，所述变压器100还可以是单相变压器或者是三相变压器。本实施方式中，以油浸式的三相变压器为例进行说明，应当理解的是，本发明所提供的技术方案可以相应地适用于其他类型的变压器中。Fig. 1 is a front view showing the structure of a transformer 100 according to an embodiment of the present invention. It should be understood that the transformer 100 may be an oil immersed transformer or a dry transformer or a gas insulated transformer. The transformer 100 may also be a single phase transformer or a three phase transformer. In the present embodiment, an oil-immersed three-phase transformer is taken as an example for description. It should be understood that the technical solution provided by the present invention can be correspondingly applied to other types of transformers.
所述变压器100可以包括油箱110以及设置在油箱110内的器身120(器身120的结构可参阅图2)。可在油箱110外可设置油位计31、排油管32、低压套管33以及高压套管34，所述油位计31可用于查看油箱110内的油量，所述排油管32可用于将油箱110内的冷却油排出。The transformer 100 may include a fuel tank 110 and a body 120 disposed in the oil tank 110 (the structure of the body 120 may be referred to FIG. 2). An oil level gauge 31, an oil drain pipe 32, a low pressure bushing 33, and a high pressure bushing 34 may be disposed outside the fuel tank 110. The oil level gauge 31 may be used to view the amount of oil in the fuel tank 110, and the oil drain pipe 32 may be used to The cooling oil in the oil tank 110 is discharged.
请参阅图2，所述器身120包括铁心10以及绕组20。所述铁心10可以采用硅钢片制成，空载损耗小，空载损耗水平甚至能够达到14型，空载电流和空载噪音远优于标准要求。所述铁心10可包括三个柱体11、连接于三个柱体11的一端的上铁轭12以及连接于三个柱体11的另一端的下铁轭13。每一柱体11外设置一所述绕组20。每一所述绕组20均可以包括低压绕组21和高压绕组22，其中，所述低压绕组21采用铝锆合金箔制成，所述高压绕组22采用铝锆合金线制成。所述低压绕组21设置于所述柱体11外，所述高压绕组22设置于所述低压绕组21外。所述低压套管33连接所述低压绕组21， 所述高压套管34连接所述高压绕组22。Referring to FIG. 2 , the body 120 includes a core 10 and a winding 20 . The core 10 can be made of silicon steel sheet, has low no-load loss, and can even reach the 14-type no-load loss level, and the no-load current and no-load noise are far superior to the standard requirements. The core 10 may include three cylinders 11, an upper iron yoke 12 connected to one end of the three cylinders 11, and a lower iron yoke 13 connected to the other end of the three cylinders 11. A winding 20 is disposed outside each of the cylinders 11. Each of the windings 20 may include a low voltage winding 21 and a high voltage winding 22, wherein the low voltage winding 21 is made of an aluminum zirconium alloy foil, and the high voltage winding 22 is made of an aluminum zirconium alloy wire. The low voltage winding 21 is disposed outside the cylinder 11 , and the high voltage winding 22 is disposed outside the low voltage winding 21 . The low voltage bushing 33 is connected to the low voltage winding 21, and the high voltage bushing 34 is connected to the high voltage winding 22.
在所述低压绕组21和所述柱体11之间还可以设置一层围板30，围板30将低压绕组21和柱体11间隔开。在所述低压绕组21和所述柱体11之间，和/或，在所述低压绕组21和所述高压绕组22之间设置有油道40，所述油道40可与油箱110连通。A layer of shroud 30 may also be disposed between the low voltage winding 21 and the column 11, and the shroud 30 spaces the low voltage winding 21 and the column 11 apart. An oil passage 40 is provided between the low voltage winding 21 and the cylinder 11 and/or between the low voltage winding 21 and the high voltage winding 22, and the oil passage 40 may be in communication with the oil tank 110.
请参阅图3，在本实施方式中，在所述在低压绕组21和所述柱体11之间以及在所述低压绕组21和所述高压绕组22之间均设置有油道40，设置于低压绕组21和柱体11之间的油道可为低压半油道41，设置于低压绕组21和高压绕组22之间的油道40可以包括主空道42和高压半油道43。Referring to FIG. 3, in the present embodiment, an oil passage 40 is disposed between the low voltage winding 21 and the cylinder 11 and between the low voltage winding 21 and the high voltage winding 22, and is disposed on The oil passage between the low voltage winding 21 and the cylinder 11 may be a low pressure half oil passage 41, and the oil passage 40 disposed between the low pressure winding 21 and the high voltage winding 22 may include a main air passage 42 and a high pressure half oil passage 43.
在本实施方式中，所述低压半油道41可以设置在低压绕组21和围板30之间，所述低压半油道41贴近所述低压绕组21的内侧。In the present embodiment, the low pressure half oil passage 41 may be disposed between the low voltage winding 21 and the shroud 30, and the low pressure half oil passage 41 is adjacent to the inner side of the low voltage winding 21.
在本实施方式中，所述主空道42贴近所述低压绕组21的外侧，所述高压半油道43贴近所述高压绕组22的内侧。In the present embodiment, the main air passage 42 is adjacent to the outer side of the low voltage winding 21, and the high pressure half oil passage 43 is adjacent to the inner side of the high voltage winding 22.
请参阅图4，在所述柱体11与所述低压绕组21之间，还可以设置若干的撑板35和/或若干的撑条36，通过所述撑板35和/或所述撑条36，能过填充所述柱体11与所述低压绕组21之间的缝隙，让绕组20紧固在柱体11外，提高绕组20与柱体11的结合强度。Referring to FIG. 4, between the cylinder 11 and the low-voltage winding 21, a plurality of struts 35 and/or a plurality of struts 36 may be provided through the struts 35 and/or the struts 36. The gap between the cylinder 11 and the low voltage winding 21 can be filled, and the winding 20 can be fastened outside the cylinder 11 to improve the bonding strength of the winding 20 and the cylinder 11.
在本实施方式中，所述撑板35和/或所述撑条36可以设置在所述柱体11和所述围板30之间。In the present embodiment, the gusset 35 and/or the struts 36 may be disposed between the pillar 11 and the fascia 30.
在所述油箱110以及油道40中填充有植物油，所述植物油可以是食用植物油，或者可以在食用植物油中添加食品级性能增强添加剂配置而成。植物油可以是豆油、菜籽油中的一种或者多种等，应当理解的是，所述植物油还可以包括其他种类。The oil tank 110 and the oil passage 40 are filled with vegetable oil, which may be edible vegetable oil, or may be configured by adding a food grade performance enhancing additive to the edible vegetable oil. The vegetable oil may be one or more of soybean oil, rapeseed oil, etc. It should be understood that the vegetable oil may also include other species.
请参阅表1以及表2所示，表1为植物油与高燃点矿物油及有机 硅液体的理化特性比较表，表2为植物油与高燃点矿物油及有机硅液体的电性能比较表。Please refer to Table 1 and Table 2. Table 1 compares the physical and chemical properties of vegetable oil with high-flame point mineral oil and silicone liquid. Table 2 shows the comparison of electrical properties between vegetable oil and high-flame point mineral oil and silicone liquid.
Figure PCTCN2018082714-appb-000001
Figure PCTCN2018082714-appb-000001
表1植物油与高燃点矿物油及有机硅液体的理化特性比较表Table 1 Comparison of physical and chemical properties of vegetable oil and high-flame point mineral oil and silicone liquid
  植物油Vegetable oil 高燃点矿物油High ignition point mineral oil 硅树脂液体Silicone liquid
介电常数25℃Dielectric constant 25 ° C 3.13.1 2.22.2 2.712.71
电阻率(Ω·m)Resistivity (Ω·m) 10121012 1012 10131012 1013 10121012
脉冲击穿电压Pulse breakdown voltage 116116 145145 136136
介质损耗％(25℃)% dielectric loss (25 ° C) 0.250.25 0.05(最大)0.05 (maximum) -0.01-0.01
介质损耗％(100℃)% dielectric loss (100 ° C) 1.001.00 0.30.3 -0.01-0.01
表2植物油与高燃点矿物油及有机硅液体的电性能比较表Table 2 Comparison of electrical properties of vegetable oil and high-flame point mineral oil and silicone liquid
由表1可知，植物油在粘度、闪点、着火点、比热、热传导率、膨胀系数等参数方面植物油都要比矿物油好，并且在某些性能方面也明显优于硅油。由表2可知，植物油的介电常数比矿物油和有机硅液体高。It can be seen from Table 1 that vegetable oils are better than mineral oil in terms of viscosity, flash point, ignition point, specific heat, thermal conductivity, expansion coefficient and the like, and are also superior to silicone oil in some properties. As can be seen from Table 2, the vegetable oil has a higher dielectric constant than mineral oil and silicone liquid.
采用植物油的变压器100，植物油的闪点＞300℃，燃点＞350℃，属于K级难燃油，是矿物油的两倍，发生火灾和***的风险，远远低于传统矿物油变压器，因此更加安全；植物油在短时间内的降解率超过98％，不含任何有害物质，全寿命周期的碳排放量仅为矿物油的1/64，不会对环境产生污染，不会危害人体健康，因此更加清洁；植物油具有优异的耐潮性，介电常数高，延缓绝缘老化，延长绝缘寿命，相容性良好，过负荷能力强，能够降低变压器噪声，有效提高变压器100的抗氧化能力，灭弧性能优于矿物油，因此性能更加优异而且成本更低。 Transformer 100 with vegetable oil, vegetable oil with flash point >300 ° C, ignition point >350 ° C, belongs to K-class hard fuel, twice as much as mineral oil, the risk of fire and explosion, far lower than traditional mineral oil transformer, so more Safety; vegetable oil has a degradation rate of over 98% in a short period of time, does not contain any harmful substances, and the carbon emission during the whole life cycle is only 1/64 of that of mineral oil. It will not pollute the environment and will not endanger human health. Cleaner; vegetable oil has excellent moisture resistance, high dielectric constant, delays insulation aging, prolongs insulation life, good compatibility, strong overload capacity, can reduce transformer noise, effectively improve the oxidation resistance of transformer 100, arc extinguishing performance Better than mineral oil, it is superior in performance and lower in cost.
可参阅表3所示，表3为几种冷却油的运动粘度对比表。See Table 3, Table 3 for a comparison of the kinematic viscosity of several cooling oils.
Figure PCTCN2018082714-appb-000002
Figure PCTCN2018082714-appb-000002
表3几种冷却油的运动粘度对比表Table 3 Comparison of the kinematic viscosity of several cooling oils
通过表3可知，植物油比矿物油的相比，运动粘度更大，因此，会导致变压器散热性能降低；采用铝锆合金箔绕制而成的低压绕组 21，应用于植物油散热的变压器中，与线绕相比，能够更好地改善变压器的油流，提高低压绕组21的散热性能，而且，由于采用箔绕的低压绕组21，幅向短路力小，能够进一步地提高低压绕组21的抗短路能力。It can be seen from Table 3 that the vegetable oil has a higher kinematic viscosity than the mineral oil, and therefore, the heat dissipation performance of the transformer is lowered; the low-voltage winding 21 wound by the aluminum-zirconium alloy foil is applied to the transformer for heat dissipation of the vegetable oil, and Compared with the wire winding, the oil flow of the transformer can be better improved, and the heat dissipation performance of the low voltage winding 21 can be improved. Moreover, since the low voltage winding 21 wound by the foil is used, the axial short-circuiting force is small, and the short circuit of the low voltage winding 21 can be further improved. ability.
本实施方式中，所述铝锆合金箔和/或所述锆合金线按照重量百分比计，包括以下组分：锆1.6％、镧0.1-0.3％、铈0.1-0.3％、铁0.1％、硅0.05％、余下为铝和微量的杂质，在纯铝中添加锆、铁以及硅，能够显著提高铝材的机械强度以及耐热性能，添加镧和铈可以进一步强化机械强度以及耐热性能，并且能够提高导电率。In this embodiment, the aluminum zirconium alloy foil and/or the zirconium alloy wire comprises, by weight percentage, the following components: zirconium 1.6%, niobium 0.1-0.3%, niobium 0.1-0.3%, iron 0.1%, silicon 0.05%, the remaining aluminum and trace impurities, adding zirconium, iron and silicon to pure aluminum can significantly improve the mechanical strength and heat resistance of aluminum. The addition of niobium and tantalum can further strengthen the mechanical strength and heat resistance, and Can improve the conductivity.
请参阅图5所示，在温度逐渐升高的过程中，铝锆合金的屈服强度高于退火纯铝、冷拉纯铝，甚至在一定温度范围内比退火铜更高，可见铝锆合金的屈服强度相比普通纯铝更优，在一定温度范围内，优于铜线。Referring to FIG. 5, in the process of gradually increasing temperature, the yield strength of the aluminum-zirconium alloy is higher than that of the annealed pure aluminum, the cold-drawn pure aluminum, and even higher than the annealed copper in a certain temperature range, and the aluminum-zirconium alloy can be seen. The yield strength is superior to ordinary pure aluminum and is superior to copper wire in a certain temperature range.
而且，采用铝锆合金制成的绕组，与普通的铝线制成的绕组相比，具有更佳的导电性、耐热性、抗短路能力，与普通的铜线制成的绕组相比，具有噪音小、更加经济等优点。Moreover, the winding made of aluminum zirconium alloy has better conductivity, heat resistance and short circuit resistance than the winding made of ordinary aluminum wire, compared with the winding made of ordinary copper wire. It has the advantages of low noise and more economical.
采用矿物油的变压器的油道的内径范围由其变压器容量及电压计算得到。本实施方式中，为了提高变压器100的散热性能，还可以将油道40内径设计为比现有采用矿物油的变压器的油道的内径加大预设比例，在一种实施方式中，预设比例为20％，应当理解的是，所述的加大为20％可以是加大20％或者可以在20％的一定偏差范围，在一种实施方式中，预设比例为20％±2％，即所述预设比例为18％-22％。油道40的内径的加大，能够提高植物油的流动性，增加绕组20的散热面积，从而提高变压器100的散热性能、降低变压器100的升温。如果油道40内径比现有采用矿物油的变压器的油道的 内径加大过多(例如30％或以上)，则会影响变压器100的阻抗，不利于提升变压器100的性能，本实施方式中，最佳为比现有采用矿物油的变压器的油道的内径加大为20％。The inner diameter range of the oil passage of a transformer using mineral oil is calculated from its transformer capacity and voltage. In this embodiment, in order to improve the heat dissipation performance of the transformer 100, the inner diameter of the oil passage 40 may be designed to be increased by a preset ratio than the inner diameter of the oil passage of the transformer using the mineral oil in the prior art. In one embodiment, the preset is preset. The ratio is 20%. It should be understood that the increase of 20% may be 20% or may be within a certain deviation range of 20%. In one embodiment, the preset ratio is 20%±2%. , that is, the preset ratio is 18%-22%. The increase in the inner diameter of the oil passage 40 can increase the fluidity of the vegetable oil and increase the heat dissipation area of the winding 20, thereby improving the heat dissipation performance of the transformer 100 and reducing the temperature rise of the transformer 100. If the inner diameter of the oil passage 40 is increased excessively (for example, 30% or more) than the inner diameter of the oil passage of the transformer using the mineral oil, the impedance of the transformer 100 is affected, which is disadvantageous for improving the performance of the transformer 100. In this embodiment, Preferably, the inner diameter of the oil passage of the existing transformer using mineral oil is increased by 20%.
请继续参阅图2以及图6，所述器身120还可以包括上铁轭垫块50、下铁轭垫块51、上夹件52、下夹件53以及硅钢片54，所述上夹件52设于所述上铁轭垫块50的上方并将硅钢片54以及上铁轭垫块50抵压在所述绕组20的上方，所述下夹件53设于所述下铁轭垫块51的下方并将硅钢片54以及下铁轭垫块51抵压在所述绕组20的下方。本实施方式中，所述硅钢片54的厚度为5mm，应当理解的是，硅钢片54的厚度可以在一定的偏差范围之内为5mm，比如5±0.5mm，应当理解的是，所述硅钢片54还可以根据实际需要来选择相应的厚度。2 and FIG. 6, the body 120 may further include an upper iron yoke block 50, a lower iron yoke block 51, an upper clip 52, a lower clip 53 and a silicon steel sheet 54, the upper clip 52 is disposed above the upper iron yoke pad 50 and presses the silicon steel sheet 54 and the upper iron yoke pad 50 against the winding 20, and the lower clip 53 is disposed on the lower iron yoke block Below the 51, the silicon steel sheet 54 and the lower iron yoke block 51 are pressed against the winding 20. In this embodiment, the thickness of the silicon steel sheet 54 is 5 mm. It should be understood that the thickness of the silicon steel sheet 54 may be 5 mm within a certain range of deviation, such as 5 ± 0.5 mm. It should be understood that the silicon steel The sheet 54 can also be selected to have a corresponding thickness depending on actual needs.
在夹件52、53以及铁轭垫块50、51之间设置硅钢片54，能够构成三相公用磁分路，改变了传统的磁路方向，能够大大降低空载损耗以及负载损耗，有利于提高变压器100的性能。A silicon steel sheet 54 is disposed between the clips 52, 53 and the iron yoke pads 50, 51, which can form a three-phase common magnetic shunt, which changes the traditional magnetic path direction and can greatly reduce the no-load loss and load loss, which is beneficial to Improve the performance of the transformer 100.
当铁轭垫块50、51被抵压在绕组20上时，所述上铁轭垫块50的侧边可以与所述上铁轭12的侧边贴合，所述下铁轭垫块51的侧边可以与所述下铁轭13的侧边贴合。When the iron yoke pads 50, 51 are pressed against the winding 20, the side edges of the upper iron yoke pad 50 may be fitted to the side edges of the upper iron yoke 12, and the lower iron yoke pads 51 are attached. The side edges may be attached to the side edges of the lower iron yoke 13.
本实施方式中，所述上夹件52可以包括第一上夹件521和第二上夹件522，所述下夹件53可以包括第一下夹件531和第二下夹件532，在每一上夹件与相应的铁轭之间均可设置一硅钢片54。所述第一上夹件521和所述第二上夹件522设于上铁轭12的两侧，两者可以通过螺栓固定并夹紧所述硅钢片54以及所述上铁轭12。所述第一下夹件531和所述第二下夹件532设于所述下铁轭13的两侧，两者可以通过螺栓固定以夹紧所述硅钢片54以及所述下铁轭13。In this embodiment, the upper clip 52 may include a first upper clip 521 and a second upper clip 522, and the lower clip 53 may include a first lower clip 531 and a second lower clip 532. A silicon steel sheet 54 may be disposed between each of the upper clamp members and the corresponding iron yoke. The first upper clip 521 and the second upper clip 522 are disposed on both sides of the upper iron yoke 12, and both of them can be bolted and clamped to the silicon steel sheet 54 and the upper iron yoke 12. The first lower clip 531 and the second lower clip 532 are disposed on both sides of the lower iron yoke 13, and the two may be fixed by bolts to clamp the silicon steel sheet 54 and the lower iron yoke 13 .
所述器身120还可以包括上铁轭隔板60、上铁轭撑板61、下铁轭隔板62以及下铁轭撑板63，所述上铁轭隔板60以及所述上铁轭撑板61抵压于所述绕组20与所述上铁轭12之间，所述下铁轭隔板62以及所述下铁轭撑板63抵压于所述绕组20与下铁轭13之间。所述上铁轭撑板61设置于所述上铁轭隔板60的上方，所述下铁轭撑板63设置于所述下铁轭隔板62的下方。The body 120 may further include an upper iron yoke partition 60, an upper iron yoke plate 61, a lower iron yoke partition 62, and a lower iron yoke plate 63, the upper iron yoke partition 60 and the upper iron yoke The strut 61 is pressed between the winding 20 and the upper iron yoke 12, and the lower iron yoke partition 62 and the lower iron yoke 63 are pressed against the winding 20 and the lower iron yoke 13 between. The upper iron yoke plate 61 is disposed above the upper iron yoke partition 60, and the lower iron yoke plate 63 is disposed below the lower iron yoke partition 62.
请一并参阅图7，所述铁轭隔板60、61的至少一端设有缺口64，本实施方式中，所述铁轭隔板60、61的两端相对设有缺口64，所述缺口64大致呈工字型。所述缺口64可以与相应的所述柱体11的边缘形状相配，相应的所述柱体11至少部分地设于所述缺口64内。例如，所述柱体11的横截面形状可为跑道形，所述缺口64可为跑道形的弧形缺口，当所述柱体11设于所述缺口64内时，所述缺口64能够与柱体11的侧边贴合。本实施方式的铁轭隔板60、61，贴合面积更大，感应耐压好，支撑面积更大，而且强度高，能够更好地隔绝铁轭12、13和绕组20，具有优良的抗短路能力。Referring to FIG. 7 , at least one end of the iron yoke spacers 60 and 61 is provided with a notch 64. In this embodiment, the two ends of the iron yoke spacers 60 and 61 are oppositely provided with a notch 64. 64 is roughly I-shaped. The notch 64 may match the shape of the edge of the corresponding cylinder 11 , and the corresponding column 11 is at least partially disposed in the notch 64 . For example, the cross-sectional shape of the cylinder 11 may be a racetrack shape, and the notch 64 may be a raceway-shaped arcuate notch. When the cylinder 11 is disposed in the notch 64, the notch 64 can The sides of the cylinder 11 are fitted together. The iron yoke spacers 60 and 61 of the present embodiment have a larger bonding area, a better inductive withstand voltage, a larger supporting area, and higher strength, and can better isolate the iron yokes 12, 13 and the winding 20, and have excellent resistance. Short circuit capability.
以一变压器的示例性的实施例来说明本发明的变压器的优点，该示例性的变压器的具体参数如下。The advantages of the transformer of the present invention are illustrated in an exemplary embodiment of a transformer, the specific parameters of which are as follows.
额定容量Rated Capacity 400/400kVA400/400kVA
额定电压Rated voltage 10000±2×2.5％/400V10000±2×2.5%/400V
额定频率Rated frequency 50Hz50Hz
阻抗电压Impedance voltage 4％4%
该示例性的变压器，铁心材料：B20R070；铁心截面：197.315cm 2；铁心重量：490kg；低压绕组材料：铝锆合金箔；高压绕组材料：铝锆合金线；低压绕组匝数：31匝；高压绕组匝数：1409匝；低压导线截面积：196.1mm 2；高压导线截面积：10.7mm 2；低压绕组重量： 60kg；高压绕组重量：147kg；冷却介质：植物油。 The exemplary transformer, core material: B20R070; core cross section: 197.315 cm 2 ; core weight: 490 kg; low voltage winding material: aluminum zirconium alloy foil; high voltage winding material: aluminum zirconium alloy wire; low voltage winding turns: 31 匝; Winding turns: 1409匝; low-voltage wire cross-sectional area: 196.1mm 2 ; high-voltage wire cross-sectional area: 10.7mm 2 ; low-voltage winding weight: 60kg; high-voltage winding weight: 147kg; cooling medium: vegetable oil.
该示例性的变压器，空载损耗：<0.41kW，负载损耗：<4.52kW热稳定校核最高温度165℃，动稳定校核绕组最大应力78Mpa，均小于铝合金耐热和强度许用值，并有足够的安全裕度。The exemplary transformer, no-load loss: <0.41kW, load loss: <4.52kW thermal stability check maximum temperature 165 ° C, dynamic stability check winding maximum stress 78Mpa, are less than aluminum alloy heat and strength allowable value, And there is enough safety margin.
可参阅表4所示，表4为本实施方式的变压器、矿物油变压器、干式变压器对比情况如下。Referring to Table 4, Table 4 compares the transformer, mineral oil transformer and dry transformer of the present embodiment as follows.
Figure PCTCN2018082714-appb-000003
Figure PCTCN2018082714-appb-000003
表4几种变压器的对比表Table 4 Comparison table of several transformers
由此可知，本发明的变压器，相比传统的变压器而言，性能更加优越。It can be seen that the transformer of the present invention has superior performance compared to the conventional transformer.
本申请的说明书和权利要求中，词语“包括/包含”和词语“具有/包括”及其变形，用于指定所陈述的特征、数值、步骤或部件的存在，但不排除存在或添加一个或多个其它特征、数值、步骤、组件或它们的组合。In the specification and claims of the present application, the words "include/comprise" and the words "comprising" or "comprising", and variations thereof, are used to designate the presence of the recited features, values, steps or components, but do not exclude the presence or addition of one or A number of other features, values, steps, components, or combinations thereof.
本发明的一些特征，为阐述清晰，分别在不同的实施例中描述，然，这些特征也可结合于单一实施例中描述。相反，本发明的一些特征，为简要起见，仅在单一实施例中描述，然，这些特征也可分开单独或以任何合适的组合于不同的实施例中进行描述。Some of the features of the present invention are described in the different embodiments for clarity of illustration, and these features may also be described in combination with a single embodiment. Rather, some of the features of the invention are described in a single embodiment for the sake of brevity, however, these features may also be described separately or in any suitable combination in different embodiments.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims (10)

  1. 一种变压器，包括铁心和绕组，所述绕组包括设置于所述铁心的柱体外的低压绕组、设于所述低压绕组外的高压绕组，其特征在于，所述低压绕组采用铝锆合金箔绕制而成，所述高压绕组采用铝锆合金线绕制而成，在所述低压绕组与所述铁心之间和/或在所述低压绕组与所述高压绕组之间设置有油道，所述油道内填充有植物油。A transformer comprising a core and a winding, the winding comprising a low voltage winding disposed outside the cylinder of the core, and a high voltage winding disposed outside the low voltage winding, wherein the low voltage winding is wound by an aluminum zirconium alloy foil The high voltage winding is wound by an aluminum zirconium alloy wire, and an oil passage is disposed between the low voltage winding and the iron core and/or between the low voltage winding and the high voltage winding. The oil passage is filled with vegetable oil.
  2. 根据权利要求1所述的变压器，其特征在于，所述油道的内径比现有采用矿物油的变压器的油道的内径加大预设比例。The transformer according to claim 1, wherein an inner diameter of said oil passage is increased by a predetermined ratio from an inner diameter of an oil passage of a transformer using a mineral oil.
  3. 如权利要求2所述的变压器，其特征在于，所述预设比例为20％。The transformer of claim 2 wherein said predetermined ratio is 20%.
  4. 根据权利要求1所述的变压器，其特征在于，所述变压器为三相变压器，所述变压器还包括抵压于所述绕组顶部的上铁轭垫块、抵压于所述绕组底部的下铁轭垫块、抵压所述铁心的上铁轭的上夹件、以及抵压所述铁心的下铁轭的下夹件，所述上夹件设于所述上铁轭垫块上方，所述下夹件设于所述下铁轭垫块的下方，在所述上夹件和上铁轭垫块之间、在所述下夹件和所述下铁轭垫块之间分别设置有硅钢片。The transformer according to claim 1, wherein said transformer is a three-phase transformer, said transformer further comprising an upper iron yoke pad that is pressed against the top of said winding, and a lower iron that is pressed against the bottom of said winding a yoke pad, an upper clip that presses against the upper iron yoke of the core, and a lower clip that presses the lower iron yoke of the core, the upper clip being disposed above the upper iron yoke block The clip member is disposed under the lower yoke pad, and between the upper clip and the upper yoke pad, and between the lower clip and the lower yoke pad are respectively disposed Silicon steel sheet.
  5. 根据权利要求4所述的变压器，其特征在于，所述上夹件包括分别设于所述上铁轭两侧的第一上夹件和第二上夹件，所述下夹件包括分别设于所述下铁轭两侧的第一下夹件和第二下夹件，在所述第一上夹件与所述上铁轭垫块之间、所述第二上夹件与所述上铁轭垫块之间、所述第一下夹件与所述下铁轭垫块之间、所述第二下夹件与所述下铁轭垫块之间均分别设置有硅钢片。The transformer according to claim 4, wherein the upper clip member comprises a first upper clip member and a second upper clip member respectively disposed on two sides of the upper iron yoke, and the lower clip member comprises separate sets a first lower clip and a second lower clip on both sides of the lower iron yoke, between the first upper clip and the upper iron yoke block, the second upper clip and the A silicon steel sheet is disposed between the upper iron yoke pads, between the first lower clamp member and the lower iron yoke spacer, and between the second lower clamp member and the lower iron yoke spacer.
  6. 根据权利要求4或5所述的变压器，其特征在于，所述硅钢片的厚度为5mm。A transformer according to claim 4 or 5, wherein said silicon steel sheet has a thickness of 5 mm.
  7. 根据权利要求1所述的变压器，其特征在于，所述铁心的上铁轭的与所述绕组之间、以及所述铁心的下铁轭与所述绕组之间均设置有铁轭隔板，所述铁轭隔板的至少一端设有缺口，相应的所述柱体至少部分地设于所述缺口内。The transformer according to claim 1, wherein an iron yoke spacer is disposed between the upper iron yoke of the core and the winding, and between the lower iron yoke of the core and the winding. At least one end of the iron yoke partition is provided with a notch, and the corresponding column is at least partially disposed in the notch.
  8. 根据权利要求7所述的变压器，其特征在于，所述缺口与所述柱体的边缘形状相配。The transformer of claim 7 wherein said notch matches the shape of the edge of said cylinder.
  9. 根据权利要求1所述的变压器，其特征在于，所述铁心由若干个硅钢片制成，在所述铁心的柱体与所述低压绕组之间设置有若干的撑板和/或若干的撑条。The transformer according to claim 1, wherein said core is made of a plurality of silicon steel sheets, and a plurality of struts and/or a plurality of struts are disposed between said core of said core and said low voltage winding. article.
  10. 根据权利要求1所述的变压器，其特征在于，所述锆合金箔和/或所述锆合金线按照重量百分比计，包括以下组分：锆1.6％、镧0.1-0.3％、铈0.1-0.3％、铁0.1％、硅0.05％、余下为铝。The transformer according to claim 1, wherein said zirconium alloy foil and/or said zirconium alloy wire comprises, by weight percent, the following components: zirconium 1.6%, lanthanum 0.1-0.3%, lanthanum 0.1-0.3 %, iron 0.1%, silicon 0.05%, and the rest is aluminum.
PCT/CN2018/082714 2018-04-11 2018-04-11 Transformer WO2019196037A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026375A1 (en) * 1979-09-26 1981-04-08 Transformatoren Union Aktiengesellschaft Transformer producing the high tension for an ignition spark
CN104134519A (en) * 2014-07-15 2014-11-05 国家电网公司 Environmentally friendly oil-immersed distribution transformer based on high ignition point vegetable oil
CN105304284A (en) * 2015-09-23 2016-02-03 沈群华 Powder transformer
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
CN208111264U (en) * 2018-04-11 2018-11-16 江苏中天伯乐达变压器有限公司 transformer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026375A1 (en) * 1979-09-26 1981-04-08 Transformatoren Union Aktiengesellschaft Transformer producing the high tension for an ignition spark
CN104134519A (en) * 2014-07-15 2014-11-05 国家电网公司 Environmentally friendly oil-immersed distribution transformer based on high ignition point vegetable oil
CN105304284A (en) * 2015-09-23 2016-02-03 沈群华 Powder transformer
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
CN208111264U (en) * 2018-04-11 2018-11-16 江苏中天伯乐达变压器有限公司 transformer

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