CN103745820A - Manufacturing method of antiaging hybrid insulating oil transformer - Google Patents
Manufacturing method of antiaging hybrid insulating oil transformer Download PDFInfo
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- CN103745820A CN103745820A CN201410027336.7A CN201410027336A CN103745820A CN 103745820 A CN103745820 A CN 103745820A CN 201410027336 A CN201410027336 A CN 201410027336A CN 103745820 A CN103745820 A CN 103745820A
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Abstract
The invention discloses a manufacturing method of an antiaging hybrid insulating oil transformer. The manufacturing method is applicable to oil-immersed power transformers different in voltage level and capacity. An ordinary transformer with a transformer body and a box cover already assembled well and with no transformer oil injected is selected and adopted, and except for the transformer oil, a structural material and the like of the transformer do not need to be changed. All parameters like voltage ratio, direct-current resistance, induced voltage withstanding, alternating-current voltage withstanding, no-load current, no-load loss, loaded loss, impedance voltage and oil tank strength and sealability of a 10kV antiaging hybrid insulating oil power distribution transformer manufactured according to the method can meet requirements of GB/T6451-2008, GB1094.1-1996, GB1094.2-1996, GB1094.3-2003 and GB1094.5-2008.
Description
Technical field
The present invention relates to a kind of preparation method of New insulated oil-impregnated transformer, particularly a kind of oil-immersed power transformer that is applicable to different electric pressures and capacity.
Background technology
Power transformer, as the core of power conversion in delivery of electrical energy and delivery process, is the equipment of most important in equipment safety operation and most critical.Transformer oil becomes the chief component of insulation in transformer together with insulating paper, and it is aging gradually that the two is subject to the factor impacts such as electricity, heat in During Process of Long-term Operation, causes that transformer insulated performance and mechanical performance decline.The deteriorated meeting of insulating oil causes insulating oil moisture absorption to increase, and water content strengthens, decreasing insulating, and cooling, heat radiation and arc extinction performance reduce greatly.The greasy filth of aging rear generation can stop up oil duct, and impact heat radiation also can be accelerated transformer inner body and insulating device simultaneously aging, thereby shortens the life-span of oil and equipment, also can cause great equipment breakdown in the time of seriously.Thereby, select the ageing resistance can better insulating oil, thereby effectively improve the insulation property of Oil-Paper Insulation and suppress the aging of Oil-Paper Insulation, to guaranteeing that the stable operation of distribution transformer long-term safety has decisive influence.
In oil-immersed power transformer, most widely used insulating oil is mineral insulating oil, but mineral oil belongs to primary energy, and its flash-point and burning-point are low, water saturation is very low, biological degradability is poor, once leak, will pollute water source, living environment etc.In mid-term in 20th century, the high burning-point finding out both at home and abroad and reproducible Novel insulating oil have a variety of, but fail broad practice in transformer because of poisonous contaminated environment or cost costliness.Afterwards, researcher turns to good electric property, high-flash, high biological degradation rate, the reproducible natural esters of environmental protection both at home and abroad, the BIOTEMP vegetable insulating oil transformer of the high oleic acid of ABB AB, rapeseed oil distribution transformer small-sized, light, that environmental performance is good has been manufactured in the exploitation of Japan Fu Ji motor company, University Of Chongqing has worked out the small distribution transformer of refining vegetable seed oil-impregnated, but because natural esters condensation point is high and the large characteristic of viscosity causes natural esters to fail extensive use.In recent years, University Of Chongqing had been mixed with out anti-aging mix insulation oil according to a certain percentage by natural esters and mineral oil, and had realized extensive, in enormous quantities, serialization production.This anti-aging mix insulation oil has been taken into account the pluses and minuses of natural esters and mineral oil, and by the mutual supplement with each other's advantages of mineral oil and natural esters, aging speed that can not only reduction itself, also can delay the aging of insulating paper simultaneously, has promoted the anti-aging characteristic of Oil-Paper Insulation.But up to the present, not yet develop one both at home and abroad and mix oil impregnated distribution transformer, therefore,, if develop anti-aging mix insulation oil transformer, this exerts far reaching influence Novel insulating oil research field at home and abroad and produce huge using value in power industry.
Summary of the invention
In view of this, technical problem to be solved by this invention is to provide a kind of preparation method of anti-aging mix insulation oil transformer, is applicable to the oil-immersed power transformer of different electric pressures and capacity.
The object of the invention is to be achieved through the following technical solutions:
The preparation method of a kind of anti-aging mix insulation oil transformer provided by the invention, comprises the following steps:
S1: vacuum drying treatment transformer body;
S2: will be dried and hang in oil tank of transformer after transformer body after treatment arranges and connection transformer device body and oil tank of transformer assembling formation transformer;
S3: inject anti-aging mix insulation oil according to transformer voltage grade and capacity in fuel tank under vacuum state, till making anti-aging mix insulation oil fuel head exceed all insulating parts;
S4: oiling finishes rear continuation degassed processing under vacuum state, pours inert gas to the pressure in mailbox again and reaches atmospheric value during to the default degassed time;
S5: transformer oil storage is installed, the default scale place of anti-aging mix insulation oil to transformer oil storage of reinjecting;
S6: carry out vacuum treatment under vacuum state, reach and pour inert gas to the pressure in transformer body in the default backward transformer body of vacuum processing time and reach atmospheric value;
S7: carry out full trials after the transformer assembling is put into trial zone is standing and reached default time of repose.
Further, described vacuum state is the vacuum environment under partial vacuum or vacuum condition.
Further, described transformer body adopts boulton process processing, comprises the following steps:
S21: transformer body is carried out to preheating: preheat temperature is 105 ℃-115 ℃; With the each position of transformer body, evenly reaching 105-110 ℃ warm-up time is as the criterion;
S22: make transformer body in low vacuum state;
S23: make transformer body in the continous vacuum stage, according to amount of capacity, continuous anhydrous 4-10 hour can think that dry processing completes.
Further, the oiling of described partial vacuum is for the following transformer of 110kV, and described transformer partial vacuum oiling process is as follows: first fuel tank is taken out to partial vacuum, described vacuum residual voltage≤133.2Pa, about 3-5 hour, then from bottom oil-feed; In refueling process, oil temperature remains within the scope of 50-70 degree, controls insulation resistance and is not less than 300 megaohms.
Further, described transformer vacuum oiling process comprises heating, vacuumizes and fueling procedure, and the oiling of described transformer vacuum is for 110kV high-power transformer, should reach≤66.6Pa of vacuum residual voltage; The oiling of described transformer vacuum is for 500kV transformer, should reach≤13.32Pa of vacuum residual voltage.
Further, the default degassed time of described transformer is 8-10 hour.
Further, described inert gas is that purity is to be more than or equal to 99% nitrogen.
Further, described default time of repose is 10-14 hour; Described default vacuum processing time is 10-14 hour.
Further, according to different electric pressures and capacity, the atmospheric pressure value of described vacuum environment is 133.2-13.32Pa.
The invention has the advantages that: the invention provides a kind of preparation method of anti-aging mix insulation oil transformer, be applicable to the oil-immersed power transformer of different electric pressures and capacity.By selecting common transformer, this common transformer is the common transformer that delivery test is qualified or has assembled transformer body and case lid but the common transformer of injection transformer oil not, except transformer oil, transformer device structure material etc. does not need to change; The parameters such as voltage ratio, D.C. resistance, insulation resistance, induction according to the anti-aging mix insulation of the 10kV of two different capabilities that a process for preparing oil distribution transformer are withstand voltage, ac voltage withstanding, no-load current, no-load loss, load loss, impedance voltage and fuel tank strength seal can meet GB GB/T6451-2008, GB1094.1-1996, GB1094.2-1996, GB1094.3-2003 and GB1094.5-2008 requirement.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Preparation method's flow chart of the anti-aging mix insulation oil transformer that Fig. 1 provides for the embodiment of the present invention;
The Insulation Oil Transformer structural representation that Fig. 2 provides for the embodiment of the present invention.
1, transformer body; 2, oil tank of transformer; 3, transformer oil storage; 4, case lid.
Embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail; Should be appreciated that preferred embodiment is only for the present invention is described, rather than in order to limit the scope of the invention.
Preparation method's flow chart of the anti-aging mix insulation oil transformer that Fig. 1 provides for the embodiment of the present invention, the Insulation Oil Transformer structural representation that Fig. 2 provides for the embodiment of the present invention, as shown in the figure: the preparation method of a kind of anti-aging mix insulation oil transformer provided by the invention, comprises the following steps:
S1: vacuum drying treatment transformer body 1;
S2: will be dried and hang in oil tank of transformer after transformer body after treatment arranges and connection transformer device body and oil tank of transformer 2 are assembled formation transformer;
S3: inject anti-aging mix insulation oil according to transformer voltage grade and capacity in fuel tank under vacuum state, till making anti-aging mix insulation oil fuel head exceed all insulating parts;
S4: oiling finishes rear continuation degassed processing under vacuum state, pours inert gas to the pressure in mailbox again and reaches atmospheric value during to the default degassed time;
S5: transformer oil storage 3 is installed, the default scale place of anti-aging mix insulation oil to transformer oil storage of reinjecting;
S6: carry out vacuum treatment under vacuum state, reach and pour inert gas to the pressure in transformer body in the default backward transformer body of vacuum processing time and reach atmospheric value;
S7: carry out full trials after the transformer assembling is put into trial zone is standing and reached default time of repose.
Described in the present embodiment, transformer can be selected and assemble transformer body and case lid 4 but the common transformer of injection transformer oil not.
Described vacuum state is the vacuum environment under partial vacuum or vacuum condition.
Described transformer body adopts boulton process processing, comprises the following steps:
S21: transformer body is carried out to preheating: preheat temperature is 105 ℃-115 ℃; With the each position of transformer body, evenly reaching 105-110 ℃ warm-up time is as the criterion;
S22: make transformer body in low vacuum state; Pressure gauge between 0.04-0.07 constantly inflation bleed, take moisture away, now device body temperature constantly raises, and enters the continous vacuum stage after reaching set temperature;
S23: make transformer body in the continous vacuum stage, according to amount of capacity, continuous anhydrous 4-10 hour can think that dry processing completes.Temperature remains on uniform maximum permissible temperature, and vacuum degree can reach 133.2-13.32Pa according to different capabilities and electric pressure, and anhydrous continuously.Generally within big or small continuous anhydrous 4-10 hour by measure, can think dry to complete.
The oiling of described partial vacuum is for the following transformer of 110kV, and described transformer partial vacuum oiling process is as follows: first fuel tank is taken out to partial vacuum, described vacuum residual voltage≤133.2Pa, about 3-5 hour, then from bottom oil-feed; In refueling process, oil temperature remains within the scope of 50-70 degree, controls insulation resistance and is not less than 300 megaohms.
Described transformer vacuum oiling process comprises heating, vacuumizes and fueling procedure, and the oiling of described transformer vacuum is for 110kV high-power transformer, should reach≤66.6Pa of vacuum residual voltage; The oiling of described transformer vacuum is for 500kV transformer, should reach≤13.32Pa of vacuum residual voltage.
The default degassed time of described transformer is 8-10 hour.The default degassed time can arrange according to different capabilities and electric pressure under vacuum condition;
Described inert gas is the nitrogen of purity Wei≤99%.
Described default time of repose is 10-14 hour; Described default vacuum processing time is 10-14 hour.
According to different electric pressures and capacity, the atmospheric pressure value of described vacuum environment is 133.2-13.32Pa.
Described full trials comprises that high pressure tests high pressure and ground test, no-load voltage ratio test (standard is no more than 0.5% error), direct resistance metering, frequency tripling test (frequency tripling is mainly the dielectric voltage withstand of surveying alternate, turn-to-turn and coil and casing), zero load and load test (high-power transformer load is not generally done very, makes 75% current strength), withstand voltage test (i.e. lasting one minute of the voltage of three sesquialters) and fuel tank strength seal low pressure and ground and low pressure.
The transformer oil of the present embodiment is selected anti-aging mix insulation oil, and its performance parameter is as shown in the table.
Described full trials comprises that high pressure tests high pressure and ground test, no-load voltage ratio test (standard is no more than 0.5% error), direct resistance metering, frequency tripling test (frequency tripling is mainly the dielectric voltage withstand of surveying alternate, turn-to-turn and coil and casing), zero load and load test (high-power transformer load is not generally done very, makes 75% current strength), withstand voltage test (i.e. lasting one minute of the voltage of three sesquialters) and fuel tank strength seal low pressure and ground and low pressure.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (9)
1. a preparation method for anti-aging mix insulation oil transformer, is characterized in that: comprise the following steps:
S1: vacuum drying treatment transformer body;
S2: will be dried and hang in oil tank of transformer after transformer body after treatment arranges and connection transformer device body and oil tank of transformer assembling formation transformer;
S3: inject anti-aging mix insulation oil according to transformer voltage grade and capacity in fuel tank under vacuum state, till making anti-aging mix insulation oil fuel head exceed all insulating parts;
S4: oiling finishes rear continuation degassed processing under vacuum state, pours inert gas to the pressure in mailbox again and reaches atmospheric value during to the default degassed time;
S5: transformer oil storage is installed, the default scale place of anti-aging mix insulation oil to transformer oil storage of reinjecting;
S6: carry out vacuum treatment under vacuum state, reach and pour inert gas to the pressure in transformer body in the default backward transformer body of vacuum processing time and reach atmospheric value;
S7: carry out full trials after the transformer assembling is put into trial zone is standing and reached default time of repose.
2. the preparation method of anti-aging mix insulation oil transformer according to claim 1, is characterized in that: described vacuum state is the vacuum environment under partial vacuum or vacuum condition.
3. the preparation method of anti-aging mix insulation oil transformer according to claim 1, is characterized in that: described transformer body adopts boulton process processing, comprises the following steps:
S21: transformer body is carried out to preheating: preheat temperature is 105 ℃-115 ℃; With the each position of transformer body, evenly reaching 105-110 ℃ warm-up time is as the criterion;
S22: make transformer body in low vacuum state;
S23: make transformer body in the continous vacuum stage, according to amount of capacity, continuous anhydrous 4-10 hour can think that dry processing completes.
4. the preparation method of anti-aging mix insulation oil transformer according to claim 1, it is characterized in that: the oiling of described partial vacuum is for the following transformer of 110kV, described transformer partial vacuum oiling process is as follows: first fuel tank is taken out to partial vacuum, described vacuum residual voltage≤133.2Pa, about 3-5 hour, then from bottom oil-feed; In refueling process, oil temperature remains within the scope of 50-70 degree, controls insulation resistance and is not less than 300 megaohms.
5. the preparation method of anti-aging mix insulation oil transformer according to claim 1, it is characterized in that: described transformer vacuum oiling process comprises heating, vacuumizes and fueling procedure, the oiling of described transformer vacuum is for 110kV high-power transformer, should reach≤66.6Pa of vacuum residual voltage; The oiling of described transformer vacuum is for 500kV transformer, should reach≤13.32Pa of vacuum residual voltage.
6. the preparation method of anti-aging mix insulation oil transformer according to claim 1, is characterized in that: the default degassed time of described transformer is 8-10 hour.
7. the preparation method of anti-aging mix insulation oil transformer according to claim 1, is characterized in that: described inert gas is that purity is to be more than or equal to 99% nitrogen.
8. the preparation method of anti-aging mix insulation oil transformer according to claim 1, is characterized in that: described default time of repose is 10-14 hour; Described default vacuum processing time is 10-14 hour.
9. the preparation method of anti-aging mix insulation oil transformer according to claim 1, is characterized in that: according to different electric pressures and capacity, the atmospheric pressure value of described vacuum environment is 133.2-13.32Pa.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783039A (en) * | 2016-12-02 | 2017-05-31 | 国网四川省电力公司电力科学研究院 | Hybrid insulation systems oil-filled transformer and its structural optimization method |
| CN110791361A (en) * | 2019-11-18 | 2020-02-14 | 国网黑龙江省电力有限公司电力科学研究院 | Preparation method of low-temperature mixed insulating oil |
| CN111613398A (en) * | 2020-06-04 | 2020-09-01 | 重庆大学 | Method for improving stability of vegetable insulating oil based on pulse thermal aging |
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| CN202996543U (en) * | 2012-11-30 | 2013-06-12 | 天津市特变电工变压器有限公司 | Transformer body structure of novel oil immersed type distribution transformer |
| CN103346008A (en) * | 2013-08-02 | 2013-10-09 | 江苏亨特集团华特电气有限公司 | Assembly method of oil-immersed transformer |
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- 2014-01-22 CN CN201410027336.7A patent/CN103745820A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202996543U (en) * | 2012-11-30 | 2013-06-12 | 天津市特变电工变压器有限公司 | Transformer body structure of novel oil immersed type distribution transformer |
| CN103346008A (en) * | 2013-08-02 | 2013-10-09 | 江苏亨特集团华特电气有限公司 | Assembly method of oil-immersed transformer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783039A (en) * | 2016-12-02 | 2017-05-31 | 国网四川省电力公司电力科学研究院 | Hybrid insulation systems oil-filled transformer and its structural optimization method |
| CN106783039B (en) * | 2016-12-02 | 2018-04-24 | 国网四川省电力公司电力科学研究院 | The structural optimization method of hybrid insulation systems oil-immersed transformer |
| CN110791361A (en) * | 2019-11-18 | 2020-02-14 | 国网黑龙江省电力有限公司电力科学研究院 | Preparation method of low-temperature mixed insulating oil |
| CN111613398A (en) * | 2020-06-04 | 2020-09-01 | 重庆大学 | Method for improving stability of vegetable insulating oil based on pulse thermal aging |
| CN111613398B (en) * | 2020-06-04 | 2021-06-18 | 重庆大学 | Method for improving stability of vegetable insulating oil based on pulse thermal aging |
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Application publication date: 20140423 |