CN101408578B - Multiple factors accelerated aging test apparatus and method for oil paper insulation of transformer - Google Patents
Multiple factors accelerated aging test apparatus and method for oil paper insulation of transformer Download PDFInfo
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- CN101408578B CN101408578B CN2008102330941A CN200810233094A CN101408578B CN 101408578 B CN101408578 B CN 101408578B CN 2008102330941 A CN2008102330941 A CN 2008102330941A CN 200810233094 A CN200810233094 A CN 200810233094A CN 101408578 B CN101408578 B CN 101408578B
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Abstract
The invention provides a testing device and a testing method of electricity-heat-mechanical stress three-factor combined ageing for transformer paper oil insulation ageing study; the testing device comprises an electric heating ageing oven, in which a transformer paper oil insulation simulator, a shake unit and a temperature control device used for controlling the temperature of the electric heating ageing oven. The shake unit can drive the simulator to vibrate, the simulator is electrically connected with a high-voltage power supply; the testing method includes vacuum drying and oil impregnation of insulating paper, attaching the paper to the earth electrode in a stainless steel case of the testing device, winding coils as a high voltage electrode outside the insulating paper and the earth electrode and injecting insulating oil to the stainless steel case; connecting a high tension lead with the high-voltage power supply and starting the shake unit; sampling the insulating paper and the insulating oil alternately and measuring insulation ageing parameters.
Description
Technical field
The present invention relates to transformer parts pick-up unit and method, be specifically related to a kind of transformer oil paper insulation multiple-factor accelerated aging tester and test method.
Background technology
Transformer is the very crucial main equipment of electric system, the insulation fault of its major failure for causing owing to long-term ageing.And paper oil insulation is the important component part of insulation in the oil-filled transformer, in order to study and grasp the aging rule of transformer, the method of normal at present employing accelerated aging test is studied, but be mainly thermal stress in the prior art, the single-factor ageing research of electric stress or mechanical stress,, the associating ageing research of heat and mechanical stress does not appear in the newspapers so far, and the aging rule of multi-stress aging is not the aging simple superposition of single-factor, it is much aging more complicated than single-factor, in order to obtain test findings accurately, grasp the aging rule of paper oil insulation, need provide a kind of electricity-thermal-mechanical stress three factors to unite aging transformer oil Aging of Oil-paper Insulation in Oil test unit and method, but at present, above-mentioned test unit and method are not arranged also in the prior art.
Summary of the invention
In view of this, in order to address the above problem, the present invention unites aging test unit for the research of transformer oil Aging of Oil-paper Insulation in Oil provides a kind of electricity-thermal-mechanical stress three factors.
The object of the present invention is achieved like this, transformer oil paper insulation multiple-factor accelerated aging tester, transformer oil paper insulation multiple-factor accelerated aging tester, comprise the thermal-electrical aging case, be provided with transformer oil paper insulation analogue means, vibrating device in the thermal-electrical aging case and be used to control the temperature control equipment of thermal-electrical aging the temperature inside the box, described vibrating device can drive the vibration of transformer oil paper insulation analogue means, and transformer oil paper insulation analogue means is electrically connected with high-voltage power supply.
Further, described transformer oil paper insulation analogue means comprises a stainless steel case, be arranged at intervals with multi-group electrode in the described stainless steel case, every group of electrode comprises that an electrode comprises a ground electrode and a high-field electrode, the loam cake of described stainless steel casing is the insulated enclosure plate, the insulated enclosure plate is provided with connection terminal, and the input end of connection terminal is electrically connected with high-voltage power supply, and high-field electrode is connected with connection terminal output terminal on the insulated enclosure plate by high-voltage connection; Described stainless steel casing top is provided with the T-valve that is communicated with the stainless steel cabinets cavity, and two ports in addition of described T-valve are respectively applied for and connect vaccum-pumping equipment and inflated with nitrogen equipment; Described ground electrode is electrically connected with the stainless steel casing, also is provided with ground terminal on the described stainless steel casing;
Further, described stainless steel bottom half is provided with the draining valve that is communicated with the stainless steel cabinets cavity;
Further, described ground electrode is a silicon steel plate, and silicon steel plate is used for fixing insulating paper, and high-field electrode is to be wrapped in insulating paper and the outer coil of silicon steel plate.
The present invention also provides a kind of transformer oil paper insulation multiple-factor accelerated aging test method, comprises the steps:
1) with the insulating paper vacuum drying;
2) with the insulating paper vacuum oil immersion;
3) insulating paper behind the vacuum oil immersion is affixed on the ground electrode in the transformer oil paper insulation multiple-factor accelerated aging tester stainless steel casing, and outside insulating paper and ground electrode winding around as high-field electrode, and in the stainless steel casing, injecting insulating oil, insulating oil floods electrode;
4) high-voltage connection and high-voltage power supply are connected, and opened vibrating device;
5) insulating paper, insulating oil are taken a sample at interval, measure the insulation ag(e)ing parameter.
Further, in the described step 1), with insulating paper under temperature 80-100 ℃, vacuum tightness 40-60Pa condition, vacuum drying 48 hours;
Further, described step 2) in, with insulating paper under temperature 30-50 ℃, vacuum tightness 40-60Pa condition, vacuum oil immersion 24 hours;
Further, described insulating oil adopts the 25# transformer oil;
Further, in the described step 4), described high-voltage power supply provides 11kV alternating voltage, and described vibrating device vibration frequency is 40-60Hz;
Further, in the described step 5), measure at least a insulation ag(e)ing parameter in the micro-water content in the insulating paper degree of polymerization, insulation oil dissolved gas content and the insulating oil.
Compared with prior art, the present invention has filled up the blank to transformer electricity, heat, the research of mechanical stress multi-stress aging, the test unit of designed electricity, heat, mechanical vibration three stress associating accelerated deteriorations and the aging method of evaluation can effectively disclose the transformer aging rule, the method that makes it or heat ageing or mechanical aging more aging than the single-factor electricity has improved the test figure reliability and has also shortened digestion time simultaneously effectively more near the practical operation situation of transformer.
Other advantages of the present invention, target, to set forth in the following description to a certain extent with feature, and to a certain extent,, perhaps can obtain instruction from the practice of the present invention based on being conspicuous to those skilled in the art to investigating hereinafter.Target of the present invention and other advantages can be passed through following instructions, claims, and the specifically noted structure realizes and obtains in the accompanying drawing.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing:
Accompanying drawing shows the structural representation of transformer oil paper insulation multiple-factor accelerated aging tester of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.
Referring to Fig. 1, the transformer oil paper insulation multiple-factor accelerated aging tester of this preferred embodiment, comprise a thermal-electrical aging case 2, the bottom of thermal-electrical aging case 2 inner chambers is provided with vibrating device 8, stainless steel casing 4 is arranged on the vibrating device 8, can vibrate with vibrating device, the loam cake of stainless steel casing 4 is an insulated enclosure plate 7, be arranged at intervals with 3 silicon steel plates 5 in the stainless steel casing 4 as ground electrode, this device in use, insulating paper 9 is attached on the silicon steel plate 5, outside at insulating paper 9 simultaneously three coils are fastened respectively as high-field electrode 12, and in stainless steel casing 4, inject insulating oil 13, make it flood ground electrode 5 and insulating paper 9, insulating oil 13, high-field electrode 12 and insulating paper 9 are promptly formed the analogue means of insulation in the transformer, thermal-electrical aging case 2 tops are provided with the bushing 6 that penetrates for high-voltage connection, high-voltage power supply is incorporated in the thermal-electrical aging case 2 by bushing 6, and be connected with connection terminal 14 input ends on the insulated enclosure plate 7 respectively by high-voltage connection 1, be connected with connection terminal 14 output terminals on the insulated enclosure plate 7 respectively by high-voltage connection 1 at stainless steel box house high-field electrode 12, connection terminal 14 main sealing and the electric actions of rising on the insulated enclosure plate 7, stainless steel casing 4 tops are provided with the T-valve 3 that is communicated with stainless steel casing 4 inner chambers, two ports in addition of described T-valve 3 are respectively applied for and connect vaccum-pumping equipment and inflated with nitrogen equipment, as vacuumizing or on-off valve during inflated with nitrogen, stainless steel casing 4 bottoms are provided with the stainless steel cabinets cavity and are communicated with draining valve 10, draining valve 10 is used as the back oil extraction of getting in the process of the test that oil is measured and test finishes, the ground terminal 11 that is communicated with stainless steel casing 4 is connected with thermal-electrical aging case 2 inwalls by lead, and by thermal-electrical aging case 2 shell reliable grounds.
Present embodiment adopts the product TEMP550 of Korea S SANWONTECH (ternary) company Chinese liquid crystal touch screen Programmable Temperature controller to carry out temperature control, and described Programmable Temperature controller is connected with thermal-electrical aging case 2, is used to control the temperature of thermal-electrical aging case 2.This Programmable Temperature controller adopts 5.6 inches single color LCD touch-screen displays, Chinese operation display interface, but display setting test parameters, working time.The man-machine conversation mode only needs design temperature, just can realize thermal-electrical aging case 2 AutoPlay functions.Temperature control system is used intelligent Control Software System, possesses the operating mode of Automatic Combined heating system, thereby guarantees the High Accuracy Control in whole temperature range, reaches energy saving purposes.
The transformer oil paper insulation multiple-factor accelerated aging test method of this preferred embodiment comprises the steps:
1) insulating paper is placed vacuum tank, under 90 ℃ of temperature, vacuum tightness 50Pa condition, vacuum drying 48 hours;
2) after drying finishes, keep the interior vacuum tightness of vacuum tank constant, temperature is adjusted into 40 ℃, insulating oil is injected vacuum tank, immersion oil is cool to room temperature after 24 hours, takes out insulating paper;
3) insulating paper behind the vacuum oil immersion is affixed on the ground electrode in the transformer oil paper insulation multiple-factor accelerated aging tester stainless steel casing, and outside insulating paper and ground electrode winding around as high-field electrode, and in the stainless steel casing, injecting insulating oil, insulating oil can adopt the 25# transformer oil;
4) high-voltage connection and high-voltage power supply are connected, and opened vibrating device, described high-voltage power supply provides 11kV alternating voltage, and described vibrating device vibration frequency is 50Hz;
5) insulating paper, insulating oil are taken a sample at interval, measure in the insulating paper degree of polymerization, insulation oil dissolved gas composition and the insulating oil parameters such as micro-water content, the oil dissolved gas composition that wherein insulate can adopt gas chromatograph to measure, and micro-water content can adopt the little water gaging instrument of Ka Erfeixiu to measure in the insulating oil; By the analysis to these parameters, the Changing Pattern of the insulating paper degree of polymerization is particularly estimated the aging of paper oil insulation, prediction transformer serviceable life, reduces transformer insulated fault.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1. transformer oil paper insulation multiple-factor accelerated aging tester, it is characterized in that: comprise the thermal-electrical aging case, be provided with transformer oil paper insulation analogue means, vibrating device in the thermal-electrical aging case and be used to control the temperature control equipment of thermal-electrical aging the temperature inside the box, described vibrating device can drive the vibration of transformer oil paper insulation analogue means, and transformer oil paper insulation analogue means is electrically connected with high-voltage power supply; Described transformer oil paper insulation analogue means comprises a stainless steel case, be arranged at intervals with multi-group electrode in the described stainless steel case, every group of electrode comprises a ground electrode and a high-field electrode, the loam cake of described stainless steel casing is the insulated enclosure plate, the insulated enclosure plate is provided with connection terminal, the input end of connection terminal is electrically connected with high-voltage power supply, and high-field electrode is connected with connection terminal output terminal on the insulated enclosure plate by high-voltage connection; Described stainless steel casing top is provided with the T-valve that is communicated with the stainless steel cabinets cavity, and two ports of described T-valve are respectively applied for and connect vaccum-pumping equipment and inflated with nitrogen equipment; Described ground electrode is electrically connected with the stainless steel casing, also is provided with ground terminal on the described stainless steel casing.
2. transformer oil paper insulation multiple-factor accelerated aging tester as claimed in claim 1, it is characterized in that: described stainless steel bottom half is provided with the draining valve that is communicated with the stainless steel cabinets cavity.
3. transformer oil paper insulation multiple-factor accelerated aging tester as claimed in claim 1, it is characterized in that: described ground electrode is a silicon steel plate, and silicon steel plate is used for fixing insulating paper, high-field electrode is to be wrapped in insulating paper and the outer coil of silicon steel plate.
4. based on the transformer oil paper insulation multiple-factor accelerated aging test method of the described transformer oil paper insulation of claim 1 multiple-factor accelerated aging tester, it is characterized in that, comprise the steps:
1) with the insulating paper vacuum drying;
2) with the insulating paper vacuum oil immersion;
3) insulating paper behind the vacuum oil immersion is affixed on the ground electrode in the transformer oil paper insulation multiple-factor accelerated aging tester stainless steel casing, and at insulating paper and ground electrode outside winding around as high-field electrode, and in the stainless steel casing, inject insulating oil;
4) high-voltage connection and high-voltage power supply are connected, and opened vibrating device;
5) insulating paper, insulating oil are taken a sample at interval, measure the insulation ag(e)ing parameter.
5. transformer oil paper insulation multiple-factor accelerated aging test method as claimed in claim 4 is characterized in that: in the described step 1), with insulating paper under temperature 80-100 ℃, vacuum tightness 40-60Pa condition, vacuum drying 48 hours.
6. transformer oil paper insulation multiple-factor accelerated aging test method as claimed in claim 4 is characterized in that: described step 2), with insulating paper under temperature 30-50 ℃, vacuum tightness 40-60Pa condition, vacuum oil immersion 24 hours.
7. transformer oil paper insulation multiple-factor accelerated aging test method as claimed in claim 4 is characterized in that: described insulating oil adopts the 25# transformer oil.
8. transformer oil paper insulation multiple-factor accelerated aging test method as claimed in claim 4, it is characterized in that: in the described step 4), described high-voltage power supply provides 11kV alternating voltage, and described vibrating device vibration frequency is 40-60Hz.
9. as each described transformer oil paper insulation multiple-factor accelerated aging test method in the claim 4 to 8, it is characterized in that: in the described step 5), measure a kind of insulation ag(e)ing parameter in the micro-water content in the insulating paper degree of polymerization, insulation oil dissolved gas content and the insulating oil at least.
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| CN2008102330941A CN101408578B (en) | 2008-11-21 | 2008-11-21 | Multiple factors accelerated aging test apparatus and method for oil paper insulation of transformer |
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| CN2008102330941A CN101408578B (en) | 2008-11-21 | 2008-11-21 | Multiple factors accelerated aging test apparatus and method for oil paper insulation of transformer |
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| CN101408578B true CN101408578B (en) | 2011-12-14 |
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