CN104134519A - Environmentally friendly oil-immersed distribution transformer based on high ignition point vegetable oil - Google Patents
Environmentally friendly oil-immersed distribution transformer based on high ignition point vegetable oil Download PDFInfo
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- CN104134519A CN104134519A CN201410335391.2A CN201410335391A CN104134519A CN 104134519 A CN104134519 A CN 104134519A CN 201410335391 A CN201410335391 A CN 201410335391A CN 104134519 A CN104134519 A CN 104134519A
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Abstract
The invention discloses an environmentally friendly oil-immersed distribution transformer based on high ignition point vegetable oil. The distribution transformer is characterized in that an oil tank is filled with vegetable oil with the ignition point greater than 330 DEG C, and the thickness of the axial oil duct among coils and the inner diameter of the oil duct at the oil inlet and outlet of the coils are adjusted to be more than 30% greater than those of the conventional standard oil-immersed distribution transformer of the identical capacity level which uses mineral insulating oil; an oil natural cooling system of the transformer adopts the structure of the inner same-way and outer one-way corrugated radiator; the radiator adopts a wavy cold-rolled steel plate and the inner diameter of the oil inlet and outlet of the radiator is adjusted to be more than 30% greater than that of the conventional standard oil-immersed distribution transformer of the identical capacity level which uses mineral insulating oil. The distribution transformer has the advantages of high safety and reliability, high environmental protection property, infinite repeated production of raw materials and natural degradation of raw materials and can eliminate the dependence of the conventional oil-immersed distribution transformer on mineral insulating oil.
Description
Technical field
The present invention relates to the distribution transformer in power equipment, relate in particular to a kind of environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil.
Background technology
Along with the fast development of process of industrialization is increasing to the demand of the energy, the energy of taking as the leading factor with mineral resources can not satisfy the demands completely, according to measuring and calculating, the essential mineral such as coal, oil resource will be at following 500 years approach exhaustions, energy controversial issue day is becoming tight, therefore the whole world is all encouraging development and application new forms of energy, to guarantee the sustainable development of the future economy.Mineral oil is the leading material of transformer insulation oil at present, occupies the more than 99% of oil for whole transformer industry, has directly caused oil-filled transformer to the consumption of limited mineral resources and dependence.
Oil-filled transformer is the visual plant in China industrial and mining enterprises and civil buildings power supply-distribution system, and oil-filled transformer mainly comprises iron core, winding, insulating material, transformer oil cooling recirculation system and the radiator being arranged in fuel tank.Wherein the effect of iron core is exactly the magnetic circuit that forms coupling magnetic flux, and the electric energy of primary circuit is converted to magnetic energy, is converted to again the electric energy of secondary circuit by own magnetic energy, is the medium of power conversion, is also the skeleton of formation transformer simultaneously.In the iron core column of iron core, be arranged with the winding with insulation, winding is the circuit part of transformer, that copper or the aluminum conductor coiling that is surrounded by insulation by surface forms, and be sleeved in the iron core column of transformer, winding once winding and secondary winding minute, a winding is that power supply input is used, secondary winding is output use, when a winding passes through alternating current, in iron core, also correspondingly produce alternating flux, according to electromagnetic induction principle, the energy of a winding input is delivered to secondary winding by iron core; Insulating paper is as soft paper web, stay, cushion block, separately from, core insulation, feet insulation; Cable paper is as the reinforced insulation of turn-to-turn insulation, layer insulation, lead wire insulation and the end leads of Transformer Winding; Transformer oil has been full of the fuel tank of transformer, its effect one is insulation, the 2nd, heat radiation, in on-load voltage regulation fuel tank, also play arc extinguishing effect, transformer oil can increase the dielectric strength of inner each parts of transformer, because oil is runny liquid, it can be full of any space of transformer inside, by Bas Discharged, avoided parts to reduce because contact the insulation causing of making moist with air; Transformer oil cooling recirculation system can be selected nature cooling recirculation system or force cooling recirculation system, the oil cooling circulation system of distribution transformer generally selects oil to force cooling recirculation system, when transformer upper strata oil temperature and lower floor's oil temperature generation temperature difference, by cooler, form oil temperature convection current, after cooler is cooling, flow back to fuel tank, play the effect that reduces transformer temperature.
Meanwhile, there is the shortcoming that burning-point is low and degradation time is long in mineral transformer insulation oil, has seriously restricted the development of oil-filled transformer.Because the burning-point of mineral transformer insulation oil is low, make oil-filled transformer much to fire-proof and explosion-proof, require high applications to be very limited.And the natural degradation time of mineral transformer oil needs more than 300 years, therefore the ring report problem of oil-filled transformer is not effectively solved so far, many times that the passive mode of taking dry-type transformer to substitute oil-filled transformer is solved, but the solid waste of dry-type transformer is also done nuisanceless disposal and utilization, produced again thus new environmental issue.
Increasingly in short supply along with oil and coal resources, the demand of finding alternative ore transformer oil sharply strengthens, can Quick for raw material, reusable, can natural degradation without the high burning-point vegetable oil of harm, environmental-protecting performance excellence, will become the leading of following transformer insulation oil.Especially the insulating capacity of vegetable oil insulating oil is much higher than the insulating capacity of traditional mineral oil, the structure of transformer, iron core and winding consumption are not being done under the prerequisite of any adjustment, only need to change the graded dielectric material of transformer, can the normal operation of safety under the condition of long-term overload 122%-130% with the vegetable oil transformer of capacity.Vegetable oil can fully be degraded (degradation rate after 21 days reaches 99%) under field conditions (factors), simultaneously according to Environmental Protection Agency's measuring and calculating contrast, in raw material production, the accumulating of transformer, use, scrap in the links such as processing, the CO of mineral oil transformer
2discharge capacity be 55 times of vegetable oil transformer, the high burning-point vegetable oil of therefore take is that explosive growth will appear in the environment-friendly type oil-filled transformer of insulation.Application number is that 200910103709.3 patent of invention discloses a kind of vegetable oil refinement method for transformer, compared with prior art, the present invention has significantly improved the security of operation of oil-filled transformer and reliability, environmental-protecting performance, reduced transformer raw material production, accumulating, use, scrap various bazardous wastes and CO in the links such as processing
2discharge capacity, and can fundamentally eliminate the dependence of oil-filled transformer to mineral transformer oil.
But, in current distribution transformer production field, lack and a kind ofly both had that very high security reliability, environmental-protecting performance are good, raw material can be made infinitely repeatedly, again can natural degradation a kind of based on high burning-point vegetable oil environment-friendly type oil immersion-type distribution transformer.
Summary of the invention
The object of this invention is to provide a kind of environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil, have advantages of safe and reliable, environmental-protecting performance is good, raw material can be made infinitely repeatedly and can natural degradation, can break away from the dependence of existing oil immersion-type distribution transformer to mineral insulating oil.
The present invention adopts following technical proposals:
A kind of environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil, mainly comprise fuel tank and be arranged on iron core, winding, insulating paper, insulation board, transformer oil cooling recirculation system and the radiator in fuel tank, it is characterized in that: in described fuel tank, be filled with burning-point higher than the vegetable oil of 330 ℃, the axial oil duct thickness between winding and the oil duct internal diameter of winding oil inlet and outlet strengthen more than 30% than the standard oil immersion-type distribution transformer of the same capability grade of existing employing mineral insulating oil; Transformer oil cooling recirculation system is selected nature cooling recirculation system, natural cooling recirculation system in adopting in the same way with outer unidirectional corrugation radiator structure; Radiator adopts wavy cold bundle steel plate, and the oil inlet and outlet internal diameter of radiator strengthens more than 30% than the standard oil immersion-type distribution transformer of the same capability grade of existing employing mineral insulating oil.
Described insulating paper and insulation board adopt high temperature resistant 180 ℃ of above insulating paper and insulation boards; Described winding conducting wire is coated with high temperature resistant 180 ℃ of above insulating varnish outward.
The mixture of one or more in described vegetable oil employing rapeseed oil, soybean oil, camellia seed oil and peanut oil.
The high pressure winding of the oil immersion-type distribution transformer of capacity below 315kVA and low pressure winding all adopt wire-wound layer coil structure; The high pressure winding that capacity is greater than the oil immersion-type distribution transformer of 315kVA adopts layered structure, and low pressure winding adopts Copper Foil winding structure.
In the oil immersion-type distribution transformer of capacity below 315kVA, the stress of high pressure winding and low pressure winding conducting wire is at 80N/mm
2below; Low pressure axis of winding upward force is below 5000N, and axially downward force is 0; High pressure axis of winding upward force is below 19600N, and axially downward force is below 28500N; Axially upwards making a concerted effort below 24500N of high pressure winding and low pressure winding, axially downward making a concerted effort below 28500N.
Structural member in the oil immersion-type distribution transformer of capacity below 315kVA, low-pressure end insulation compression stress is at 0.8N/mm
2below, high-pressure side insulation compression stress is at 2.5N/mm
2below; Top board compression is at 1.3N/mm
2below, bottom plate compression is at 1.6N/mm
2below, folder bar stress is at 80N/mm
2below.
In the oil immersion-type distribution transformer of capacity below 315kVA, low pressure winding temperature rise is below 71K, and high pressure winding temperature rise is below 70K, and pasta temperature rise is below 49K, and temperature rise unshakable in one's determination is below 17.5K, and temperature rise of hot spot is below 95.5K.
Capacity is greater than in the oil immersion-type distribution transformer of 315kVA, and the stress of conductor of high pressure winding and low pressure winding is at 80N/mm
2below; Low pressure axis of winding upward force is 0, and axially downward force is below 3800N; High pressure axis of winding upward force is below 6100N, and axially downward force is below 6600N; Axially making progress of high pressure winding and low pressure winding makes a concerted effort, below 6100N, axially to make a concerted effort to be downwards controlled at below 10400N.
Capacity is greater than the structural member in the oil immersion-type distribution transformer of 315kVA, and low-pressure end insulation compression stress is at 0.7N/mm
2below, high-pressure side insulation compression stress is at 0.5N/mm
2below; Top board compression is at 0.24N/mm
2below, bottom plate compression is at 0.55N/mm
2below, folder bar stress is at 52N/mm
2below.
Capacity is greater than in the oil immersion-type distribution transformer of 315kVA, and low pressure winding temperature rise is below 75K, and high pressure winding temperature rise is at 73K, and pasta temperature rise is below 50K, and temperature rise unshakable in one's determination is below 19.5K, and temperature rise of hot spot is below 100K.
The present invention is guaranteeing the structure of oil-filled transformer, unshakable in one's determination and winding is used under the constant prerequisite of raw material quantity, by the replacing to oil-filled transformer insulating oil, reselecting of insulating material, assurance oil-filled transformer long-term safety under 1.3 times of overload conditions is moved reliably, without carrying out large capacity oil-filled transformer for the existing oil-filled transformer overload problem occurring in short-term in service, change, effectively expand the range of application of oil-filled transformer, significantly improve the environmental-protecting performance of oil-filled transformer, reducing oil-filled transformer catches fire and the risk of exploding, reached the object of safety and environmental protection.
Accompanying drawing explanation
Fig. 1 is topology view of the present invention;
Fig. 2 is axial oil duct schematic diagram between the winding of standard oil immersion-type distribution transformer of existing employing mineral insulating oil;
Fig. 3 is axial oil duct schematic diagram between winding of the present invention;
Fig. 4 is natural cooling recirculation system schematic diagram of the present invention;
Fig. 5 is the oil inlet and outlet internal diameter schematic diagram of the standard oil immersion-type distribution transformer radiator of existing employing mineral insulating oil;
Fig. 6 is the oil inlet and outlet internal diameter schematic diagram of radiator of the present invention.
Embodiment
As shown in Figure 1, environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil of the present invention, mainly comprise fuel tank and be arranged on iron core 2, winding, insulating paper, insulation board, transformer oil cooling recirculation system and the radiator 1 in fuel tank, in described fuel tank, be filled with burning-point higher than the vegetable oil of 330 ℃, for the mineral insulating oil that replaces existing oil immersion-type distribution transformer as transformer insulation oil.Vegetable oil can adopt one or more the mixture in rapeseed oil, soybean oil, camellia seed oil and peanut oil.The vegetable oil using in the present invention, under the condition of same dielectric ability, has advantages of highlyer than plain mineral oil burning-point, is more applicable for the use of on-the-spot distribution transformer.
In environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil of the present invention, axial oil duct thickness between winding is 5mm, the oil duct thickness of winding oil inlet and outlet is 8mm, than the standard oil immersion-type distribution transformer of the same capability grade of existing employing mineral insulating oil, strengthens more than 30%.In the standard oil immersion-type distribution transformer of existing employing mineral insulating oil, the axial oil duct thickness that soaks formula distribution transformer of various different capacitance grades is that the oil duct thickness of 3mm, winding oil inlet and outlet is 5mm, and the scope of the oil inlet and outlet internal diameter of radiator 1 is 5mm left and right.And the vegetable insulating oil using in the present invention is because its kinematic viscosity is higher, thereby for guaranteeing that its mobility in transformer meets the heat radiation requirement of transformer, need relatively to increase the size of oil flow channel.
Fig. 2 and Fig. 3 are respectively between the standard oil immersion-type distribution transformer of existing employing mineral insulating oil of same capability grade and the winding of the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil of the present invention axially oil duct schematic diagram.H in Fig. 2 represents the axial oil duct thickness of the standard oil immersion-type distribution transformer of existing employing mineral insulating oil, and the H1 in Fig. 3 represents the axial oil duct thickness of the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil of the present invention, 1.3H≤H1.
As shown in Figure 4, in the present invention, transformer oil cooling recirculation system is selected nature cooling recirculation system, in employing in the same way with outer unidirectional corrugation radiator 1 structure; In Fig. 4 in fuel tank in the representative of the arrow of three groups of equidirectionals in the same way, the single group arrow representative in radiator 1 is outer unidirectional.Inside belong in the same way those skilled in the art's conventional techniques means with outer unidirectional corrugation radiator structure.Radiator 1 adopts wavy cold bundle steel plate, and the oil inlet and outlet internal diameter of radiator 1 strengthens more than 30% than the standard oil immersion-type distribution transformer of the same capability grade of existing employing mineral insulating oil.Fig. 5 and Fig. 6 are respectively the standard oil immersion-type distribution transformer of existing employing mineral insulating oil and the oil inlet and outlet internal diameter schematic diagram of the environment-friendly type oil immersion-type distribution transformer radiator 1 based on high burning-point vegetable oil of the present invention of same capability grade, and the L in Fig. 5 represents the oil inlet and outlet internal diameter of the standard oil immersion-type distribution transformer radiator 1 of existing employing mineral insulating oil; L1 in Fig. 6 represents the oil inlet and outlet internal diameter of environment-friendly type oil immersion-type distribution transformer radiator 1 radiator 1 based on high burning-point vegetable oil of the present invention, 1.3L≤L1.
Insulating paper, insulation board, supporting bracket and cushion block all adopt high temperature resistant 180 ℃ of above materials to make; Described winding conducting wire is coated with high temperature resistant 180 ℃ of above insulating varnish outward, as polyester-imide paint.
For the transformer of different capabilities, the present invention adopts multi-form high pressure winding 4 and low pressure winding 3 structures.The high pressure winding 4 of the oil immersion-type distribution transformer of capacity below 315kVA and low pressure winding 3 all adopt wire-wound layer coil structure; The high pressure winding 4 that capacity is greater than the oil immersion-type distribution transformer of 315kVA adopts layered structure, and low pressure winding 3 adopts Copper Foil winding structure.
In the oil immersion-type distribution transformer of capacity below 315kVA, the stress of high pressure winding 4 and low pressure winding 3 wires is at 80N/mm
2below; The axial upward force of low pressure winding 3 is below 5000N, and axially downward force is 0; The axial upward force of high pressure winding 4 is below 19600N, and axially downward force is below 28500N; Axially upwards making a concerted effort below 24500N of high pressure winding 4 and low pressure winding 3, axially downward making a concerted effort below 28500N.Structural member in the oil immersion-type distribution transformer of capacity below 315kVA, low-pressure end insulation compression stress is at 0.8N/mm
2below, high-pressure side insulation compression stress is at 2.5N/mm
2below; Top board compression is at 1.3N/mm
2below, bottom plate compression is at 1.6N/mm
2below, folder bar stress is at 80N/mm
2below.In the oil immersion-type distribution transformer of capacity below 315kVA, its temperature limit must meet it and meet following requirement: 3 temperature rises of low pressure winding are below 71K, and 4 temperature rises of high pressure winding are below 70K, and pasta temperature rise is below 49K, temperature rise unshakable in one's determination is below 17.5K, and temperature rise of hot spot is below 95.5K.
Capacity is greater than in the oil immersion-type distribution transformer of 315kVA, and the stress of conductor of high pressure winding 4 and low pressure winding 3 is at 80N/mm
2below; The axial upward force of low pressure winding 3 is 0, and axially downward force is below 3800N; The axial upward force of high pressure winding 4 is below 6100N, and axially downward force is below 6600N; Axially making progress of high pressure winding 4 and low pressure winding 3 makes a concerted effort, below 6100N, axially to make a concerted effort to be downwards controlled at below 10400N.Capacity is greater than the structural member in the oil immersion-type distribution transformer of 315kVA, and low-pressure end insulation compression stress is at 0.7N/mm
2below, high-pressure side insulation compression stress is at 0.5N/mm
2below; Top board compression is at 0.24N/mm
2below, bottom plate compression is at 0.55N/mm
2below, folder bar stress is at 52N/mm
2below.Capacity is greater than in the oil immersion-type distribution transformer of 315kVA, its temperature limit must meet it and meet following requirement: 3 temperature rises of low pressure winding are below 75K, and 4 temperature rises of high pressure winding are at 73K, and pasta temperature rise is below 50K, temperature rise unshakable in one's determination is below 19.5K, and temperature rise of hot spot is below 100K.
Claims (10)
1. the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil, mainly comprise fuel tank and be arranged on iron core, winding, insulating paper, insulation board, transformer oil cooling recirculation system and the radiator in fuel tank, it is characterized in that: in described fuel tank, be filled with burning-point higher than the vegetable oil of 330 ℃, the axial oil duct thickness between winding and the oil duct internal diameter of winding oil inlet and outlet strengthen more than 30% than the standard oil immersion-type distribution transformer of the same capability grade of existing employing mineral insulating oil; Transformer oil cooling recirculation system is selected transformer oil nature cooling recirculation system, natural cooling recirculation system in adopting in the same way with outer unidirectional corrugation radiator structure; Radiator adopts wavy cold bundle steel plate, and the oil inlet and outlet internal diameter of radiator strengthens more than 30% than the standard oil immersion-type distribution transformer of the same capability grade of existing employing mineral insulating oil.
2. the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil according to claim 1, is characterized in that: described insulating paper and insulation board adopt high temperature resistant 180 ℃ of above insulating paper and insulation boards; Described winding conducting wire is coated with high temperature resistant 180 ℃ of above insulating varnish outward.
3. the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil according to claim 2, is characterized in that: the mixture of one or more in described vegetable oil employing rapeseed oil, soybean oil, camellia seed oil and peanut oil.
4. the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil according to claim 3, is characterized in that: the high pressure winding of the oil immersion-type distribution transformer of capacity below 315kVA and low pressure winding all adopt wire-wound layer coil structure; The high pressure winding that capacity is greater than the oil immersion-type distribution transformer of 315kVA adopts layered structure, and low pressure winding adopts Copper Foil winding structure.
5. the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil according to claim 4, is characterized in that: in the oil immersion-type distribution transformer of capacity below 315kVA, the stress of high pressure winding and low pressure winding conducting wire is at 80N/mm
2below; Low pressure axis of winding upward force is below 5000N, and axially downward force is 0; High pressure axis of winding upward force is below 19600N, and axially downward force is below 28500N; Axially upwards making a concerted effort below 24500N of high pressure winding and low pressure winding, axially downward making a concerted effort below 28500N.
6. the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil according to claim 5, is characterized in that: the structural member in the oil immersion-type distribution transformer of capacity below 315kVA, low-pressure end insulation compression stress is at 0.8N/mm
2below, high-pressure side insulation compression stress is at 2.5N/mm
2below; Top board compression is at 1.3N/mm
2below, bottom plate compression is at 1.6N/mm
2below, folder bar stress is at 80N/mm
2below.
7. the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil according to claim 6, it is characterized in that: in the oil immersion-type distribution transformer of capacity below 315kVA, low pressure winding temperature rise is below 71K, high pressure winding temperature rise is below 70K, pasta temperature rise is below 49K, temperature rise unshakable in one's determination is below 17.5K, and temperature rise of hot spot is below 95.5K.
8. the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil according to claim 4, is characterized in that: capacity is greater than in the oil immersion-type distribution transformer of 315kVA, and the stress of conductor of high pressure winding and low pressure winding is at 80N/mm
2below; Low pressure axis of winding upward force is 0, and axially downward force is below 3800N; High pressure axis of winding upward force is below 6100N, and axially downward force is below 6600N; Axially making progress of high pressure winding and low pressure winding makes a concerted effort, below 6100N, axially to make a concerted effort to be downwards controlled at below 10400N.
9. the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil according to claim 8, is characterized in that: capacity is greater than the structural member in the oil immersion-type distribution transformer of 315kVA, and low-pressure end insulation compression stress is at 0.7N/mm
2below, high-pressure side insulation compression stress is at 0.5N/mm
2below; Top board compression is at 0.24N/mm
2below, bottom plate compression is at 0.55N/mm
2below, folder bar stress is at 52N/mm
2below.
10. the environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil according to claim 9, it is characterized in that: capacity is greater than in the oil immersion-type distribution transformer of 315kVA, low pressure winding temperature rise is below 75K, high pressure winding temperature rise is at 73K, pasta temperature rise is below 50K, temperature rise unshakable in one's determination is below 19.5K, and temperature rise of hot spot is below 100K.
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| CN201410335391.2A CN104134519B (en) | 2014-07-15 | 2014-07-15 | A kind of environment-friendly type oil immersion-type distribution transformer based on high burning-point vegetable oil |
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| WO2019196037A1 (en) * | 2018-04-11 | 2019-10-17 | 江苏中天伯乐达变压器有限公司 | Transformer |
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| WO2019196037A1 (en) * | 2018-04-11 | 2019-10-17 | 江苏中天伯乐达变压器有限公司 | Transformer |
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