CN104122465A - Device and method for united aging of multi-group piece-shaped samples under voltage temperature gradient - Google Patents
Device and method for united aging of multi-group piece-shaped samples under voltage temperature gradient Download PDFInfo
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- CN104122465A CN104122465A CN201410350428.9A CN201410350428A CN104122465A CN 104122465 A CN104122465 A CN 104122465A CN 201410350428 A CN201410350428 A CN 201410350428A CN 104122465 A CN104122465 A CN 104122465A
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Abstract
The invention discloses a device and method for united aging of multi-group piece-shaped samples under voltage temperature gradient. The device comprises an upper electrode, a lower electrode, a first constant temperature source, a second constant temperature source, a high-voltage direct-current power supply and a circuit protection device, wherein the upper electrode is used for being in contact with one side of each aged piece-shaped sample; the lower electrode is used for being in contact with the other side of each tested insulating material piece-shaped sample; the first constant temperature source is used for conducting the temperature to the upper electrode; the second constant temperature source is used for conducting the temperature to the lower electrode; the high-voltage direct-current power supply is used for controlling voltage of the upper electrode; and the circuit protection device is used for protecting a device in a circuit and the piece-shaped samples having not undergone breakdown. The device and the method are used for performing united aging on the multi-group piece-shaped samples under a high-voltage direct-current electric field and a temperature gradient field.
Description
Technical field
The invention belongs to the aging technical field of insulating material of polymer, relate to a kind of in high voltage DC power equipment insulating material have the aging method under the condition of temperature difference at electric field and material internal, be specifically related to a kind of many group sheet specimens high voltage with under thermograde, combine aging equipment and method.
Background technology
Insulating material in power equipment is subject to electricity, heat integration effect for a long time, and especially, under DC electric field, the collaborative temperature gradient effect of space charge effect under DC voltage, has a strong impact on D.C. isolation Long Service Life.For the long-term reliability of researching DC insulation, the method for use is to carry out electricity-heat integration aging test conventionally both at home and abroad at present, but that test at present is all confined to single temperature (room temperature or high temperature) is aging with combining of DC electric field; Or to apply DC electric field lower due to electrode edge effect; Or for eliminating electrode edge effect, sample is immersed and in insulating oil, carries out aging test, but oil can interact in long-term ageing process with insulating material; Or reduce aging test product number for improving electrode sealing reliability, increase the test period.Under high field intensity, air ambient, carry out the situation of aging test so existing aging technology or method can not simulate and have temp. difference field (as direct current plastic cable) in the Electric Power Equipment Insulation in actual motion, can not realize test product in enormous quantities simultaneously, make troubles to the research of insulating material in simulation actual motion.
As shown in Figure 1, be the structured flowchart of existing aging method and device, this aging method and device comprise: high-voltage DC power supply 101, top electrode 102, bottom electrode 103, sheet specimens 104, fuse 105, circuit protection device composition.
Insulating material in direct current power equipment inside and outside have under temperature difference and DC electric field acting in conjunction work, and insulating material resistivity and temperature have nonlinear relationship, therefore the Electric Field Distribution in true DC equipment insulation may with conventional homogenization temperature under Electric Field Distribution have larger difference, and this can directly affect the aging result of insulative dielectric material.
In addition, existing ageing system will quit work while having a slice to puncture in aging multi-disc sheet specimens, and this can affect the efficiency of burin-in process greatly.
Summary of the invention
The object of the invention is to address the above problem, provide a kind of many group sheet specimens voltage with under thermograde, combine aging equipment and method, this device, in order under the acting in conjunction at electric field and temperature gradient field, carries out long-term ageing to the sheet specimens of insulating material.
To achieve these goals, the technical solution adopted in the present invention is:
Many group sheet specimens, at voltage and the aging equipment of combining under thermograde, comprise high-voltage DC power supply, top electrode and bottom electrode; Top electrode is connected to the output terminal of high-voltage DC power supply, and earth terminal and the bottom electrode of high-voltage DC power supply are unified ground connection; Between top electrode and bottom electrode, add sheet specimens; Between top electrode and high voltage direct current source output terminal, be connected with circuit protection device, and top electrode and the temperature control equipment being connected respectively on bottom electrode for regulating top electrode and bottom electrode temperature.
Described temperature control equipment comprises that high temperature constant temperature circulation is bathed and cryogenic thermostat circulation is bathed; In the time that high temperature constant temperature circulation bath is connected with top electrode, cryogenic thermostat circulation is bathed and is connected with bottom electrode; In the time that high temperature constant temperature circulation bath is connected with bottom electrode, cryogenic thermostat circulation is bathed and is connected with top electrode.
Described top electrode comprises the top electrode casing of the equal opening in top and bottom, offers with high temperature constant temperature circulation bath or cryogenic thermostat circulation and bathe the top electrode liquid introducing port and the top electrode liquid export mouth that are connected on top electrode casing; In top electrode casing, be provided with some top electrode groups, top electrode group is connected with circuit protection device by the voltage inlead that is arranged at top electrode casing side; The lower end of top electrode casing is concordant with the lower end of top electrode group, be filled with epoxy resin around as top electrode group and top electrode bottom half, and the bottom of epoxy resin is concordant with the bottom of top electrode group and top electrode casing, the top of top electrode casing is provided with the top electrode gland bonnet for top electrode is sealed.
Between described top electrode gland bonnet and top electrode casing, be provided with the top electrode O-ring seal matching with top electrode gland bonnet.
Described top electrode gland bonnet encapsulates screw by top electrode and is fixed on top electrode casing.
Described bottom electrode comprises open-topped bottom electrode casing, and bottom electrode is unified ground connection after being connected with the earth terminal of high-voltage DC power supply by bottom electrode casing; On bottom electrode casing, offer with high temperature constant temperature circulation bath or cryogenic thermostat circulation and bathe the bottom electrode liquid introducing port and the bottom electrode liquid export mouth that are connected; In bottom electrode casing, be provided with some bottom electrode groups corresponding with top electrode group, the top of bottom electrode casing is provided with the bottom electrode gland bonnet for bottom electrode is sealed; The upper end of bottom electrode group is fixed on bottom electrode gland bonnet, and bottom electrode gland bonnet is stretched out in the end of bottom electrode group; The bottom of bottom electrode group is provided with spring, and one end of spring is fixed on the bottom of bottom electrode casing, and the other end is fixed on the lower surface of bottom electrode group.
Between described bottom electrode gland bonnet and bottom electrode casing, be provided with the bottom electrode O-ring seal matching with bottom electrode gland bonnet.
Described bottom electrode gland bonnet encapsulates screw by bottom electrode and is fixed on bottom electrode casing.
Described circuit protection device comprises and top electrode group some fuses one to one; One end of fuse is connected with the output terminal of high-voltage DC power supply, and the other end is connected with corresponding top electrode group.
Many group sheet specimens, at voltage and the aging method of combining under thermograde, comprise the following steps:
1) sheet specimens is put between top electrode and bottom electrode, and organized between sheet specimens two more and neither overlap;
2) temperature that high temperature constant temperature circulation is bathed and cryogenic thermostat circulation is bathed is set, and allows liquid wherein flow in top electrode and bottom electrode, form thermostatic bath;
3) until thermostatic bath, the temperature of top electrode and bottom electrode is reached after the design temperature of thermostatic bath, utilize high-voltage DC power supply to apply voltage;
4) if sheet specimens all punctures, need the output voltage of high-voltage DC power supply to adjust 0, and electrode is carried out to discharge process, then the sheet specimens puncturing is changed, then repeating step 1) to step 3);
5) after to be aging completing, need the output voltage of high-voltage DC power supply to adjust 0, and electrode is carried out to discharge process, then take out sheet specimens.
Compared with prior art, the present invention has following beneficial effect:
The present invention for multi-disc sheet insulating material provides temperature gradient field and electric field, realizes aging under temperature gradient field, high-voltage electric field acting in conjunction of many group insulating material sheet samples by simultaneously.Thermograde circulates to bathe by high and low temperature and controls the temperature of upper/lower electrode and realize.By the present invention, can study insulating material and under different temperatures gradient, under high electric field intensity effect, carry out the research of the various performances after aging.
Further, top electrode of the present invention can apply same voltage to multi-disc insulation flaky material simultaneously; Bottom electrode can be simultaneously for multi-disc insulation flaky material provides earth terminal, and electrode sleeve has O-ring seal, to prevent that circulating fluid is from gap leakage; Circuit protection device: when in ageing process, all to carry out can allowing intact sheet specimens proceed when aging sheet specimens does not all puncture aging.
Further, bottom electrode of the present invention use with spring can the appropriateness bottom electrode that freely move up and down, making has identical closeness of contact between sheet specimens that thickness there are differences and electrode, for all sheet specimens that are aging provide reliable ground.
Further, the present invention produces creeping discharge and corona for preventing electrode edge, uses the fixing multi-group electrode of epoxy and high voltage cable in top electrode, prevents that electrode edge from producing creeping discharge and avoiding electrode and the junction of high voltage cable generation corona.
Further, the present invention is in ageing process, and all to carry out can allowing intact sheet specimens proceed when aging sheet specimens does not all puncture aging, in the time that all aging sheet specimens puncture, just makes aging test stop.
Brief description of the drawings
Fig. 1 is the structured flowchart of existing DC voltage aging equipment;
Fig. 2 is the structured flowchart of the DC voltage aging equipment of the embodiment of the present invention 1;
Fig. 3 is composition and the assembling design sketch of top electrode of the present invention;
Fig. 4 is composition and the assembling design sketch of bottom electrode of the present invention;
Fig. 5 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 2, the present invention organizes sheet specimens at high voltage and the aging equipment of combining under thermograde more, comprises high-voltage DC power supply 101, top electrode 102 and bottom electrode 103; Top electrode 102 is connected on the output terminal of high-voltage DC power supply 101, the earth terminal of high-voltage DC power supply 101 and the equal ground connection of bottom electrode 103; Between top electrode 102 and bottom electrode 103, pretend sheet specimens 104; Between top electrode 102 and high-voltage DC power supply 101 output terminals, be connected with circuit protection device 205, and top electrode 102 and the temperature control equipment being connected respectively on bottom electrode 103 for regulating top electrode 102 and bottom electrode 103 temperature.Temperature control equipment comprises high temperature constant temperature circulation bath 201 and cryogenic thermostat circulation bath 202; In the time that high temperature constant temperature circulation bath 201 is connected with top electrode 102, cryogenic thermostat circulation is bathed 202 and is connected with bottom electrode 103; In the time that high temperature constant temperature circulation bath 201 is connected with bottom electrode 103, cryogenic thermostat circulation is bathed 202 and is connected with top electrode 102.As shown in Figure 5, circuit protection device 205 comprises and top electrode group 304 some fuses 206 one to one; One end of fuse 206 is connected with the output terminal of high-voltage DC power supply 101, and the other end is connected with corresponding top electrode group 304.
As shown in Figure 3, top electrode 102 comprises the top electrode casing 307 of the equal opening in top and bottom, offers with high temperature constant temperature circulation bath 201 or cryogenic thermostat circulation and bathe the 202 top electrode liquid introducing port 301 being connected and top electrode liquid export mouths 302 on top electrode casing 307; In top electrode casing 307, be provided with some top electrode groups 304, top electrode group 304 is connected with circuit protection device 205 by the voltage inlead 305 that is arranged at top electrode casing 307 sides; The lower end of top electrode casing 307 is concordant with the lower end of top electrode group 304, be filled with epoxy resin around as top electrode group 304 and top electrode casing 307 bottoms, and the bottom of epoxy resin is concordant with the bottom of top electrode group 304 and top electrode casing 307, the top of top electrode casing 307 is provided with the top electrode gland bonnet 308 for top electrode 102 is sealed.Between top electrode gland bonnet 308 and top electrode casing 307, be provided with the top electrode O-ring seal 303 matching with top electrode gland bonnet 308.Top electrode gland bonnet 308 encapsulates screw 309 by top electrode and is fixed on top electrode casing 307, thereby forms the airtight hollow top electrode casing that contains many group high-field electrode systems.
As shown in Figure 4, bottom electrode 103 comprises open-topped bottom electrode casing 406, ground connection after bottom electrode 103 is connected with the earth terminal of high-voltage DC power supply 101 by bottom electrode casing 406; On bottom electrode casing 406, offer with high temperature constant temperature circulation bath 201 or cryogenic thermostat circulation and bathe the 202 bottom electrode liquid introducing port 401 being connected and bottom electrode liquid export mouths 402; In bottom electrode casing 406, be provided with some bottom electrode groups 404 corresponding with top electrode group 304, the top of bottom electrode casing 406 is provided with the bottom electrode gland bonnet 407 for bottom electrode 103 is sealed; The upper end of bottom electrode group 404 is fixed on bottom electrode gland bonnet 407, and bottom electrode gland bonnet 407 is stretched out in the end of bottom electrode group 404; The bottom of bottom electrode group 404 is provided with spring 405, and one end of spring 405 is fixed on the bottom of bottom electrode casing 406, and the other end is fixed on the lower surface of bottom electrode group 404.Between bottom electrode gland bonnet 407 and bottom electrode casing 406, be provided with the bottom electrode O-ring seal 403 matching with bottom electrode gland bonnet 407.Bottom electrode gland bonnet 407 encapsulates screw 408 by bottom electrode and is fixed on bottom electrode casing 406.
The invention also discloses a kind of many group sheet specimens at voltage and the aging method of combining under thermograde, comprise the following steps:
1) sheet specimens is put between top electrode and bottom electrode, and organized between sheet specimens two more and neither overlap;
2) temperature that high temperature constant temperature circulation is bathed and cryogenic thermostat circulation is bathed is set, and allows liquid wherein flow in top electrode and bottom electrode, form thermostatic bath;
3) until thermostatic bath, the temperature of top electrode and bottom electrode is reached after the design temperature of thermostatic bath, utilize high-voltage DC power supply to apply voltage;
4) if sheet specimens all punctures, need the output voltage of high-voltage DC power supply to adjust 0, and electrode is carried out to discharge process, then the sheet specimens puncturing is changed, then repeating step 1) to step 3);
5) after to be aging completing, need the output voltage of high-voltage DC power supply to adjust 0, and electrode is carried out to discharge process, then take out sheet specimens.
Principle of the present invention
Top electrode of the present invention, for contacting one of them surface that is aging sheet specimens; Bottom electrode, for contacting another surface that is aging sheet specimens; The first constant temperature source, for controlling the temperature of described top electrode; The second constant temperature source, for controlling the temperature of described bottom electrode; High-voltage DC power supply, for applying DC voltage to described top electrode, high-voltage DC power supply is in order to control polarity of voltage and the amplitude of top electrode; Circuit protection device, for the equipment of holding circuit in the time that sheet specimens does not all puncture and make other not puncture sheet specimens to proceed equipment aging, in the time that sheet specimens all punctures in holding circuit.The liquid that high temperature constant temperature circulation bath will have the first steady temperature imports described liquid containing chamber by the liquid introducing port of described top electrode, and enters high temperature constant temperature circulation bath by the liquid export mouth of described top electrode, completes the circulation of liquid; The liquid that cryogenic thermostat circulation bath will have the second steady temperature imports described liquid containing chamber by the liquid introducing port of described bottom electrode, and enters cryogenic thermostat circulation bath by described liquid export mouth, completes the circulation of liquid; Circuit protection device is for being aging the equipment that makes not breakdown sheet specimens continue aging and holding circuit when sheet specimens does not all puncture, or in the time being aging that sheet specimens is whole to be punctured the equipment in holding circuit.
Also high temperature constant temperature can be bathed and is connected with bottom electrode in the present invention, to bottom electrode transmission high-temp; And cryogenic thermostat is bathed and is connected with top electrode, to top electrode conduction low temperature.Then carry out the aging of insulating material under temperature gradient field and high-voltage electric field acting in conjunction.
Also can regulate the temperature that high temperature constant temperature is bathed and cryogenic thermostat is bathed in the present invention, make conduction equal the temperature of conduction to bottom electrode to the temperature of top electrode.Then carry out the aging of insulating material under homogenization temperature field and high-voltage electric field acting in conjunction.
The present invention can realize the aging of insulating material sheet sample under temperature gradient field, high-voltage electric field acting in conjunction.Thermograde circulates to bathe by high and low temperature and controls respectively the upper/lower electrode temperature that is aging insulating material sheet sample and realize.
Above content is only explanation technological thought of the present invention; can not limit protection scope of the present invention with this; every technological thought proposing according to the present invention, any change of doing on technical scheme basis, within all falling into the protection domain of the claims in the present invention book.
Claims (10)
1. the sheet specimens of group more than, at voltage and the aging equipment of combining under thermograde, is characterized in that: comprise high-voltage DC power supply (101), top electrode (102) and bottom electrode (103); Top electrode (102) is connected to the output terminal of high-voltage DC power supply (101), the unified ground connection of the earth terminal of high-voltage DC power supply (101) and bottom electrode (103); Between top electrode (102) and bottom electrode (103), add sheet specimens (104); Between top electrode (102) and high-voltage DC power supply (101) output terminal, be connected with circuit protection device (205), and top electrode (102) with on bottom electrode (103), be connected respectively the temperature control equipment that is used for regulating top electrode (102) and bottom electrode (103) temperature.
2. many group sheet specimens according to claim 1, at voltage and the aging equipment of combining under thermograde, is characterized in that: described temperature control equipment comprises that high temperature constant temperature circulation bathes the bath (202) that circulates of (201) and cryogenic thermostat; In the time that high temperature constant temperature circulation bath (201) is connected with top electrode (102), cryogenic thermostat circulation is bathed (202) and is connected with bottom electrode (103); In the time that high temperature constant temperature circulation bath (201) is connected with bottom electrode (103), cryogenic thermostat circulation is bathed (202) and is connected with top electrode (102).
3. many group sheet specimens according to claim 2 are at voltage and the aging equipment of combining under thermograde, it is characterized in that: described top electrode (102) comprises the top electrode casing (307) of the equal opening in top and bottom, on top electrode casing (307), offer with high temperature constant temperature circulation bath (201) or cryogenic thermostat circulation and bathe top electrode liquid introducing port (301) and the top electrode liquid export mouth (302) that (202) are connected; In top electrode casing (307), be provided with some top electrode groups (304), top electrode group (304) is connected with circuit protection device (205) by the voltage inlead (305) that is arranged at top electrode casing (307) side; The lower end of top electrode casing (307) is concordant with the lower end of top electrode group (304), be filled with epoxy resin around as top electrode group (304) and top electrode casing (307) bottom, and the bottom of epoxy resin is concordant with the bottom of top electrode group (304) and top electrode casing (307), the top of top electrode casing (307) is provided with the top electrode gland bonnet (308) for top electrode (102) is sealed.
4. many group sheet specimens according to claim 3, at voltage and the aging equipment of combining under thermograde, is characterized in that: between described top electrode gland bonnet (308) and top electrode casing (307), be provided with the top electrode O-ring seal (303) matching with top electrode gland bonnet (308).
5. many group sheet specimens according to claim 4, at voltage and the aging equipment of combining under thermograde, is characterized in that: described top electrode gland bonnet (308) encapsulates screw (309) by top electrode and is fixed on top electrode casing (307).
6. many group sheet specimens according to claim 3 are at voltage and the aging equipment of combining under thermograde, it is characterized in that: described bottom electrode (103) comprises open-topped bottom electrode casing (406), bottom electrode (103) is unified ground connection after being connected with the earth terminal of high-voltage DC power supply (101) by bottom electrode casing (406); On bottom electrode casing (406), offer with high temperature constant temperature circulation bath (201) or cryogenic thermostat circulation and bathe bottom electrode liquid introducing port (401) and the bottom electrode liquid export mouth (402) that (202) are connected; In bottom electrode casing (406), be provided with some bottom electrode groups (404) corresponding with top electrode group (304), the top of bottom electrode casing (406) is provided with the bottom electrode gland bonnet (407) for bottom electrode (103) is sealed; It is upper that the upper end of bottom electrode group (404) is fixed on bottom electrode gland bonnet (407), and bottom electrode gland bonnet (407) is stretched out in the end of bottom electrode group (404); The bottom of bottom electrode group (404) is provided with spring (405), one end of spring (405) is fixed on the bottom of bottom electrode casing (406), and the other end is fixed on the lower surface of bottom electrode group (404).
7. many group sheet specimens according to claim 6, at voltage and the aging equipment of combining under thermograde, is characterized in that: between described bottom electrode gland bonnet (407) and bottom electrode casing (406), be provided with the bottom electrode O-ring seal (403) matching with bottom electrode gland bonnet (407).
8. many group sheet specimens according to claim 7, at voltage and the aging equipment of combining under thermograde, is characterized in that: described bottom electrode gland bonnet (407) encapsulates screw (408) by bottom electrode and is fixed on bottom electrode casing (406).
According to the many groups sheet specimens described in claim 1 to 8 any one at voltage and the aging equipment of combining under thermograde, it is characterized in that: described circuit protection device (205) comprises and top electrode group (304) some fuses (206) one to one; One end of fuse (206) is connected with the output terminal of high-voltage DC power supply (101), and the other end is connected with corresponding top electrode group (304).
10. the many groups sheet specimens installing as described in claim 1 to 8 any one at voltage and the aging method of combining under thermograde, is characterized in that, comprises the following steps:
1) sheet specimens is put between top electrode and bottom electrode, and organized between sheet specimens two more and neither overlap;
2) temperature that high temperature constant temperature circulation is bathed and cryogenic thermostat circulation is bathed is set, and allows liquid wherein flow in top electrode and bottom electrode, form thermostatic bath;
3) until thermostatic bath, the temperature of top electrode and bottom electrode is reached after the design temperature of thermostatic bath, utilize high-voltage DC power supply to apply voltage;
4) if sheet specimens all punctures, need the output voltage of high-voltage DC power supply to adjust 0, and electrode is carried out to discharge process, then the sheet specimens puncturing is changed, then repeating step 1) to step 3);
5) after to be aging completing, need the output voltage of high-voltage DC power supply to adjust 0, and electrode is carried out to discharge process, then take out sheet specimens.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410350428.9A CN104122465B (en) | 2014-07-22 | 2014-07-22 | Device and method for united aging of multi-group piece-shaped samples under voltage temperature gradient |
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| CN201410350428.9A CN104122465B (en) | 2014-07-22 | 2014-07-22 | Device and method for united aging of multi-group piece-shaped samples under voltage temperature gradient |
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| CN104122465B (en) | 2017-01-11 |
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