CN105974242A - Multi-factor aging simulation experiment device and simulation experiment method thereof - Google Patents
Multi-factor aging simulation experiment device and simulation experiment method thereof Download PDFInfo
- Publication number
- CN105974242A CN105974242A CN201610477629.4A CN201610477629A CN105974242A CN 105974242 A CN105974242 A CN 105974242A CN 201610477629 A CN201610477629 A CN 201610477629A CN 105974242 A CN105974242 A CN 105974242A
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- aging
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- greasy dirt
- high voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention relates to a multi-factor aging simulation experiment device and a simulation experiment method thereof. According to the device, a humidifier and a fixing foundation are arranged in a phytotron, wherein the fixing foundation is a triangular foundation, a vertical edge of the triangular foundation is fixed with an oil stain titration device, a bevel of the triangular foundation is fixed with a stator core, an end portion is provided with a vibration device and a heating temperature control device, and connection with a high voltage power source amplifier is realized through a lead. According to the method, in the phytotron, multi-stress aging measures including electricity, heat, vibration, humidity and oil stain are applied to a sample winding to realize multi-factor aging simulation experiments. The device and the method are for researching insulation aging laws and insulation characteristics of a stator winding end portion, and thereby the multi-factor aging effect on insulation of the stator winding end portion is realized.
Description
Technical field
The present invention relates to a kind of multi-stress aging device and aging method thereof, particularly a kind of Stator Winding of High Voltage Motor overhang insulation multi-stress aging device and aging method thereof, belong to technical field of motors.
Background technology
Owing to Stator Winding of High Voltage Motor end belongs to manual coiling, its mechanical performance is relatively low, running can produce between out of phase winding and strongly collide with, winding insulation is caused to tear, and winding overhang is easily corroded by the environmental factors such as greasy dirt and steam, further speed up insulation degradation, ultimately result in insulation fault.Research shows, winding overhang insulation fault probability is far above other positions of winding.Therefore, Stator Winding of High Voltage Motor end is carried out multi-stress aging, be a kind of important means studied stator winding end insulation ag(e)ing rule, avoid insulation fault to occur.Owing to Stator Winding of High Voltage Motor can run many decades under work condition state, in order to can be derived that stator winding end insulation insulation Changing Pattern under multi-stress aging effect in finite time, it is necessary to use accelerated ageing method to carry out degradation.
High-voltage motor stator winding end in running electricity to be suffered, heat, machinery, the common effect of environment iso-stress, especially winding overhang is exposed to outside stator coring groove, directly contact with the environment in air, cause its running is acted on by multiple environmental stresses such as greasy dirt, coal dust, moisture, especially can form electricity trace under the effect of vibration, greasy dirt and electricity on winding overhang surface, electricity trace length can be up to several tens cm sometimes.Research shows, stator end insulation fault almost all is caused by electricity trace, and the existence of steam in air in addition can accelerate the deterioration process of winding.Therefore, winding overhang insulation degradation situation remote high groove portion winding, existing aging method is many for stator winding straight line portion insulation ag(e)ing, and do not design the multi-stress aging method aging for overhang insulation, in terms of aging factor, the aging factor such as multiselect power taking, heat, machinery, does not consider the effect of environmental stress.
Stator winding is carried out aging by the commonly used double factor of prior art or three factor aging methods, its aging method mostly is order aging process, the most first apply a kind of aging factor, then other aging factors are applied, until aging end, the method does not considers the interactively between aging factor, and indivedual aging methods are the most comprehensive in terms of considering aging factor interactively, it is only that various aging factors are put on stator winding jointly, and does not consider the applying form of aging factor.Therefore, current aging method all can not reflect the true ageing process of stator winding insulation comprehensively, it is impossible to draws aging rule accurately, especially in terms of winding overhang insulation ag(e)ing.
In the prior art, Publication No. CN1402413A discloses one " stator winding conductor bars in electrical machines multi-stress aging device and aging method ", its aging equipment can apply electricity, heat, the mechanically and thermally aging stress of machine simultaneously to stator bar, can accelerated ageing sample, the most do not destroy sample agine mechaism, it is possible to reach preferable aging effect.But, this aging equipment yet suffers from weak point, as aging stress does not considers the effect of the environmental stress such as greasy dirt, humidity；The booster transformer of aging equipment can only provide power-frequency voltage, it is impossible to provides other kinds of voltage, it is impossible to meets the voltage ageing under non-power frequency duty；The heating system of aging equipment is to very heating with stator bar rather than selectively heating aging region, it is impossible to get rid of the heating impact on non-aging region.
In the prior art, in paper " research of large generator main insulation multi-stress aging characteristic parameter ", the multi-stress aging method to high voltage motor stator bar related to, its ageing process is: stator bar first carries out electric-thermal associating aging, mechanical vibration are carried out aging 168 hours after aging two weeks, then carrying out cold cycling aging 70 times, said process is an ageing cycle, and bar carries out different cycle period aging in the manner described above.The method is although it is contemplated that multi-stress aging, but the true ageing process of the model of action of aging stress and stator winding insulation exists a certain distance, and does not takes into account the effect of the environmental stress such as humidity and greasy dirt in ageing process equally.
Therefore, all there is certain weak point in Stator Winding of High Voltage Motor multi-stress aging device of the prior art and aging method, need to combine the feature of prior art, improve the multi-stress aging device for Stator Winding of High Voltage Motor and aging method, it is possible to the ageing process of true model stator winding insulation.
Summary of the invention
For above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of multi-stress aging analogue experiment installation and analogue experiment method thereof.
For achieving the above object, the technical solution adopted in the present invention is as follows.
A kind of multi-stress aging analogue experiment installation, for the polyfactorial aging equipment of Stator Winding of High Voltage Motor overhang insulation, including firm banking, stator core, greasy dirt titration appratus, heating and temperature control device, vibrating device, phjytotron, humidifier and high voltage power supply amplifier；It is characterized in that: described phjytotron (6) is provided with humidifier (8) and firm banking (1), described firm banking (1) is to be poured by cement and triangle base that table top inclination angle is 45 °, vertical edges at described triangle base is fixed with greasy dirt titration appratus (3), the inclined-plane of described triangle base is fixed with vibrating device (5) and the heating and temperature control device (4) of stator core (2) and end thereof, and has high voltage power supply amplifier (7) by wire connection；
Described heating and temperature control device (4) is provided with heating tape, heat-preservation cotton, thermocouple and temperature controller and constitutes, and stator winding end carries out local and heats；
Described phjytotron (6) is a confined space, and internal placement one humidifier (8), each corner is placed with wetness, in order to control humidity；
The maximum amplification of described high voltage power supply amplifier (7) is 6000 times, exports different types of voltage, meets different aging experiment demand.
A kind of experimental technique for above-mentioned multi-stress aging analogue experiment installation, it is characterised in that described method is carried out according to the following steps:
(1) carry out aging before, winding to be aging is arranged in the stator coring groove of firm banking, core slots ground connection；
(2) when carrying out senile experiment, selecting the voltage type of high voltage power supply amplifier according to aging demand, and regulate to desired level, high-voltage line is connected on the end of incoming cables of stator winding, and earth lead is connected in described stator core, and is connected with the earth；
(3) being heated winding in the glass fibre heating tape on winding surface by uniform winding, heating tape outer wrapping one layer of heat preservation is cotton, prevents heat losses, controls aging temperature by PID temperature controller and keeps constant；
(4) humidity generator by being placed in artificial climate indoor adds deterioration with moisture to experimental enviroment, controls humidity level by wetness；
(5) by vibrating device, test winding is vibrated aging, according to the parameter of aging demand regulation vibrating device；
(6) by greasy dirt titration device, test winding is carried out greasy dirt aging, greasy dirt solution configure is placed in burette, regulates burette valve, control to titrate flow velocity, with the aging requirement of satisfied difference soil level；
(7) when carrying out above-mentioned many stress and being aging, electricity, heat, vibration, humidity, greasy dirt are applied simultaneously on sample winding, it is achieved multiple-factor Aging simulation experiment simultaneously.
Implement a kind of multi-stress aging analogue experiment installation and analogue experiment method thereof that the invention described above is provided, it it is the Stator Winding of High Voltage Motor overhang insulation multi-stress aging simulation experiment of the teaching and scientific research experiment for institution of higher learning, compared with prior art, it has the beneficial effects that the present invention can carry out the multiple-factor accelerated ageing of stator winding end, agine mechaism and aging rule for research stator winding insulation, assessment stator winding degree of aging, provide good aging equipment and method, and the combination degradation of any aging factor can be carried out according to different aging demands.
Present configuration is simple, easy to operate, provides Stator Winding of High Voltage Motor overhang insulation multi-stress aging analogue experiment installation and the test method thereof of a kind of teaching and scientific research for institution of higher learning.
Accompanying drawing explanation
Fig. 1 is stator winding end of the present invention insulation multi-stress aging system main TV structure schematic diagram.
Fig. 2 is stator winding end of the present invention insulation multi-stress aging system heating and temperature control equipment main TV structure schematic diagram.
In figure: 1: firm banking；2: stator core；3: greasy dirt titration appratus；4: heating and temperature control device；5: vibrating device；6: phjytotron；7: high voltage power supply amplifier；8: humidifier.
Specific embodiments
For the ease of understanding the purpose of the present invention, technical scheme and advantage, below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is made further instructions.Should be appreciated that specific embodiments described herein is used only for explaining the present invention, be not used to limit the invention.
Implement a kind of multi-stress aging analogue experiment installation that the invention described above is provided, it it is the Stator Winding of High Voltage Motor overhang insulation multi-stress aging simulation experiment for institution of higher learning's teaching and scientific research experimentation, see shown in accompanying drawing, mainly include firm banking (1), stator core (2), greasy dirt titration appratus (3), heating and temperature control equipment (4), vibrating device (5), phjytotron (6), humidifier (8) and high voltage power supply amplifier (7).It is the most aging that this device can carry out many stress to Stator Winding of High Voltage Motor overhang insulation, and realizes protection and timing automatically.Five kinds of ageing parameters regulate according to aging demand, and system structure schematic diagram is as shown in Figure 1.
Firm banking (1) is the table top poured by cement, and its inclination angle is 45 °, has the groove that fixed stator is unshakable in one's determination, have the groove of fixing greasy dirt titration appratus in the plane on inclined-plane, respectively fixed stator (2) and greasy dirt titration appratus (3) unshakable in one's determination.Thermocouple, at stator winding end, is placed in bottom heating tape by the heating tape uniform winding in heating and temperature control equipment (4), and heating tape outer wrapping one layer of heat preservation is cotton, and PID temperature controller is placed on the level table of firm banking (1).Vibrating device (5) provides vibration stress, and the humidifier (8) in phjytotron (6) provides aging humidity.
High voltage power supply amplifier (7) is used for providing the high voltage needed for voltage ageing, and its maximum amplification is 6000 times, with timing and automatic safety device, it is provided that different types of high voltage, selects voltage type according to aging demand.When aging winding punctures or slides sudden strain of a muscle, amplifier automatically powers off.
The method realizing said apparatus is, when carrying out multi-stress aging, winding is heated in the heating tape of stator winding end by uniform winding, thermocouple is placed in bottom heating tape, heating tape outer wrapping one layer of heat preservation is cotton, preventing heat losses, PID temperature controller controls aging temperature and keeps constant, and the highest aging temperature of system is 250 DEG C.Vibration stress is provided by vibrating device (5), can export dissimilar, the vibration stress of amplitude, selects oscillatory type according to aging demand.Greasy dirt is provided by greasy dirt titration appratus (3), aging before, the greasy dirt of desired concn is poured in burette, regulates burette valve, control greasy dirt flow velocity, with the aging requirement of satisfied different soil level.Humidity provides by being placed in the indoor humidity generator of artificial climate, is placed in the indoor wetness of artificial climate to determine humidity level, when humidity is more than when arranging value, and humidity generator stops humidification, when humidity is less than when arranging value, and humidity generator starts humidification.Output voltage type and the amplitude of high voltage power supply amplifier (7) are adjusted to aging desired level, and high-voltage line is connected on the end of incoming cables of stator winding, and earth lead is connected with stator core (2), and the method is simple to operate, noiseless electric discharge.When carrying out above-mentioned many stress and being aging, electricity, heat, vibration, humidity, greasy dirt are applied simultaneously on sample winding, it is achieved that multiple-factor is the most aging.
Claims (2)
1. a multi-stress aging analogue experiment installation, for the polyfactorial aging equipment of Stator Winding of High Voltage Motor overhang insulation, including firm banking, stator core, greasy dirt titration appratus, heating and temperature control device, vibrating device, phjytotron, humidifier and high voltage power supply amplifier；It is characterized in that: described phjytotron (6) is provided with humidifier (8) and firm banking (1), described firm banking (1) is to be poured by cement and triangle base that table top inclination angle is 45 °, vertical edges at described triangle base is fixed with greasy dirt titration appratus (3), the inclined-plane of described triangle base is fixed with vibrating device (5) and the heating and temperature control device (4) of stator core (2) and end thereof, and has high voltage power supply amplifier (7) by wire connection；
Described heating and temperature control device (4) is provided with heating tape, heat-preservation cotton, thermocouple and temperature controller and constitutes, and stator winding end carries out local and heats；
Described phjytotron (6) is a confined space, and internal placement one humidifier (8), each corner is placed with wetness, in order to control humidity；
The maximum amplification of described high voltage power supply amplifier (7) is 6000 times, exports different types of voltage, meets different aging experiment demand.
2. the experimental technique for multi-stress aging analogue experiment installation as claimed in claim 1, it is characterised in that described method is carried out according to the following steps:
(1) carry out aging before, winding to be aging is arranged in the stator coring groove of firm banking, core slots ground connection；
(2) when carrying out senile experiment, selecting the voltage type of high voltage power supply amplifier according to aging demand, and regulate to desired level, high-voltage line is connected on the end of incoming cables of stator winding, and earth lead is connected in described stator core, and is connected with the earth；
(3) being heated winding in the glass fibre heating tape on winding surface by uniform winding, heating tape outer wrapping one layer of heat preservation is cotton, prevents heat losses, controls aging temperature by PID temperature controller and keeps constant；
(4) humidity generator by being placed in artificial climate indoor adds deterioration with moisture to experimental enviroment, controls humidity level by wetness；
(5) by vibrating device, test winding is vibrated aging, according to the parameter of aging demand regulation vibrating device；
(6) by greasy dirt titration device, test winding is carried out greasy dirt aging, greasy dirt solution configure is placed in burette, regulates burette valve, control to titrate flow velocity, with the aging requirement of satisfied difference soil level；
(7) when carrying out above-mentioned many stress and being aging, electricity, heat, vibration, humidity, greasy dirt are applied simultaneously on sample winding, it is achieved multiple-factor Aging simulation experiment simultaneously.
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| CN201610477629.4A CN105974242A (en) | 2016-06-28 | 2016-06-28 | Multi-factor aging simulation experiment device and simulation experiment method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161341A (en) * | 2019-06-05 | 2019-08-23 | 广东博立科技有限公司 | The component accelerated ageing method of inspection of electronic product |
| CN110261743A (en) * | 2019-06-24 | 2019-09-20 | 广东电网有限责任公司 | A kind of cable degradation detecting device |
| CN112269081A (en) * | 2020-10-14 | 2021-01-26 | 西安交通大学 | Multi-factor aging stress control platform and method for stator bar of large hydraulic generator |
| CN114113932A (en) * | 2021-11-22 | 2022-03-01 | 国网河南省电力公司电力科学研究院 | Device for accelerating crusting, decaying and aging of composite insulator core rod |
| CN114184906A (en) * | 2021-11-08 | 2022-03-15 | 西南交通大学 | Crosslinked polyethylene cable insulation state evaluation method based on multi-scale aging factors |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161341A (en) * | 2019-06-05 | 2019-08-23 | 广东博立科技有限公司 | The component accelerated ageing method of inspection of electronic product |
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| CN110261743A (en) * | 2019-06-24 | 2019-09-20 | 广东电网有限责任公司 | A kind of cable degradation detecting device |
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| CN112269081A (en) * | 2020-10-14 | 2021-01-26 | 西安交通大学 | Multi-factor aging stress control platform and method for stator bar of large hydraulic generator |
| CN114184906A (en) * | 2021-11-08 | 2022-03-15 | 西南交通大学 | Crosslinked polyethylene cable insulation state evaluation method based on multi-scale aging factors |
| CN114184906B (en) * | 2021-11-08 | 2022-07-08 | 西南交通大学 | Crosslinked polyethylene cable insulation state evaluation method based on multi-scale aging factors |
| CN114113932A (en) * | 2021-11-22 | 2022-03-01 | 国网河南省电力公司电力科学研究院 | Device for accelerating crusting, decaying and aging of composite insulator core rod |
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