CN104181424B - Test device and test method for electric heat joint aging of transformer winding - Google Patents
Test device and test method for electric heat joint aging of transformer winding Download PDFInfo
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- CN104181424B CN104181424B CN201410426211.1A CN201410426211A CN104181424B CN 104181424 B CN104181424 B CN 104181424B CN 201410426211 A CN201410426211 A CN 201410426211A CN 104181424 B CN104181424 B CN 104181424B
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Abstract
The invention discloses a test device and a test method for electric heat joint aging of a transformer winding. The test device comprises a sealing tank, a support plate and a high voltage draining device, wherein the sealing tank is used for supplying an aging environment; the support plate is used for supporting a transformer winding model; the high voltage draining device is used for supplying a high voltage power supply and a high voltage electrode; a baffle is arranged in the sealing tank and divides the sealing tank into two independent sealing spaces, and the support plate and the high voltage draining device are arranged on a same side of the sealing tank. According to the test device and the test method, electric heat joint aging and heat aging test of the transformer winding can be simultaneously performed in a same sealing environment, so that influence of single factor variable-electric field on oiled paper aging can be better analyzed.
Description
Technical field
The present invention relates to insulation of electrical installation on-line monitoring and fault diagnosis field, particularly to a kind of to transformator oilpaper
Insulation winding carries out the assay device accelerating thermal-electrical aging and test method.
Background technology
Power transformer as the core of energy conversion in electric energy transmission and delivery process, will lead by its accident causing that lost efficacy
Cause the interruption of supply of electric power, and cause huge economic loss.Oil-Paper Insulation is as the important composition of transformator interior insulation
Part, accounts for major portion by the transformer fault that it causes.Oilpaper in During Process of Long-term Operation be subject to electricity, heat, machinery, moisture and
The impact of the factors such as corrosion and gradually aging, decreasing insulating simultaneously leads to insulation defect, or even causes transformator master to indulge absolutely
Reason hinders, thus threatening the safe operation of transformator.
Transformer oil paper insulation winding is carried out with the aging Transformer Operation Status with simulation actual field of electric heating joint, can
Recognize the paper insulated agine mechaism of transformer oil further.Adopt the technique study transformator oilpaper of accelerated aging test exhausted at present
The aging rule of edge system.However, common accelerated aging test is acceleration heat ageing or higher electric field under higher temperature
Under acceleration voltage ageing, but real transformer Oil-Paper Insulation bears heat and the effect of electric field simultaneously, therefore to paper oil insulation
System carries out the ruuning situation of the electric heating aging more realistic transformator of joint.In addition, existing at present for accelerated ageing examination
The device tested typically can only carry out single heat ageing or single voltage ageing, even if some the carried out electric heating joint occurring is aging
Device, its also cannot carry out simultaneously electric heating joint aging and heat ageing, with realize control single-factor variable electric field to oilpaper
The purpose of aging impact.
Content of the invention
In view of this, an object of the present invention is the assay device providing a kind of Transformer Winding electric heating joint aging,
This assay device can make Transformer Winding electric heating joint aging carry out in same sealed environment with thermal aging test simultaneously,
Thus the impact aging to oilpaper of single-factor variable electric field can preferably be analyzed.
The above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of Transformer Winding electric heating joint ageing test apparatus, including for providing the hermetically sealed can of ageing environment, being used for
Support the gripper shoe of transformer winding model and the high pressure drainage system for providing high voltage power supply and high-field electrode, described sealing
It is provided with baffle plate, hermetically sealed can is separated into two sub- tank bodies, described gripper shoe and the setting of high pressure drainage system by described baffle plate in tank
The same side in hermetically sealed can；
Further, described hermetically sealed can include tank body, closure, sealing gasket and for closure is fastened on close on tank body
Envelope tight loop；The opening surrounding of described tank body and the bottom surrounding of closure are provided with Baltimore groove, and described sealing gasket is arranged on recessed
In shape groove；
Further, described gripper shoe is rustless steel circular base slab, and described stainless steel shoe is used for tank body vertical isolation
And it is divided into area is total tank body base area 3/4 and 1/4 two sub- tank bodies；Described area is that 3/4 sub- tank body carries out winding
The electric heating joint degradation of model, described area is that 1/4 sub- tank body carries out the single thermal aging test of winding model；
Further, described high pressure drainage system includes teflon rod, high pressure guide rod and is used for stationary transformer high pressure
The high pressure rustless steel circle boatswain chair of end winding, described high pressure guide rod is arranged in teflon rod, described high pressure guide rod two ends
It is additionally provided with voltage equalizing ball, pass through between the voltage equalizing ball that described high pressure guide rod is arranged in hermetically sealed can and high pressure rustless steel circle boatswain chair
High-voltage conducting wires connect；
Further, described teflon rod and makes it expose 1/3 in hermetically sealed can side is with 45 degree of inclination angle angle insertion tank；
Further, described transformer winding model part includes high-pressure side Transformer Winding, low-pressure end Transformer Winding, little
Type voltage equalizing ball, high-pressure side fixed screw, low-pressure end fixed screw and bandage；Described high-pressure side fixed screw is used for connecting high-pressure side
Transformer Winding is used for uniform high-pressure side Transformer Winding with high pressure not with high pressure rustless steel circle boatswain chair, described small-sized voltage equalizing ball
The electric field of rust steel circle boatswain chair junction, described low-pressure end fixed screw is used for connecting low-pressure end Transformer Winding and gripper shoe,
Described bandage is used for fixing high-pressure side Transformer Winding and low-pressure end Transformer Winding；
The second object of the present invention be provide one kind to make Transformer Winding electric heating joint is aging exists with thermal aging test simultaneously
The test method carrying out in same sealed environment
The above-mentioned purpose of the present invention is achieved through the following technical solutions:
This test method comprises the following steps:
S1: transformer oil and transformer winding model are dried；
S2: the good oil of pretreatment and transformer winding model are put in the space on hermetically sealed can baffle plate both sides, will be used for old
The hermetically sealed can changed is put in the ageing oven of constant temperature；
S3: connect circuit, high voltage is applied to the transformer winding model in hermetically sealed can, carry out the electric heating connection of winding model
Close burn-in test and single thermal ageing test；
Further, in described step s1, dry run is specific as follows: first by oil with winding model in 90 DEG C/50pa environment
Middle drying 48 hours, subsequently puts into winding model in oil and is dried 48 hours in 90 DEG C/50pa environment；
Further, described step s2 detailed process is as follows: puts in two sub- tank bodies by winding model first, using high pressure
Wire connects high pressure drainage system and winding model in 3/4 sub- tank body, is then placed in the good transformer oil of pretreatment, covers close
Capping, screwing hermetic tight loop, finally whole device is put in the ageing oven of constant temperature；
Further, described step s3 detailed process is as follows: by provide test high pressure step-up side lead connect to
The ceramic insulator on ageing oven top, then connects ageing oven inner ceramic insulator leading-out terminal and hermetically sealed can side with lead
Voltage equalizing ball leading-out terminal simultaneously applies high pressure to ageing oven.
The invention has the beneficial effects as follows: the assay device of the present invention and test method can make Transformer Winding electric heating joint
Aging carry out in same sealed environment with thermal aging test, thus single-factor variable electric field can preferably be analyzed simultaneously
The impact aging to oilpaper.
Other advantages of the present invention, target and feature will be illustrated to a certain extent in the following description, and
And to a certain extent, will be apparent to those skilled in the art based on to investigating hereafter, or can
To be instructed from the practice of the present invention.The target of the present invention and other advantages can be realized by description below and
Obtain.
Brief description
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
The detailed description of one step, wherein:
Fig. 1 is assay device structural representation of the present invention.
Specific embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.It should be appreciated that preferred embodiment
Only for the present invention is described, rather than in order to limit the scope of the invention.
As illustrated, a kind of Transformer Winding electric heating joint ageing test apparatus, including for providing the close of ageing environment
Sealed cans, for supporting the gripper shoe 9 of transformer winding model 7 and for providing the high pressure drain of high voltage power supply and high-field electrode to fill
Put, in described hermetically sealed can, be provided with baffle plate 12, hermetically sealed can is separated into two sub- tank bodies, described gripper shoe and high pressure by described baffle plate
Drainage system is arranged on the same side in hermetically sealed can.
In the present embodiment, transformer winding model is individually placed in two sub- tank bodies of hermetically sealed can, two sub- tank bodies
In quite especially two sub- tank bodies of sealed environment, oxygen content is essentially identical, therefore carries out electric heating connection respectively in two sub- tank bodies
Close aging with thermal aging test when ensure that two kinds test sealed environments identical, thus can preferably analyze single-factor change
The impact aging to oilpaper of amount electric field.
In the present embodiment, described hermetically sealed can includes tank body, closure, sealing gasket and is used for for closure being fastened on tank body
Sealing tight loop；The opening surrounding of described tank body and the bottom surrounding of closure are provided with Baltimore groove, described sealing gasket setting
In Baltimore groove；The sealing structure structure of the present embodiment is simple, good sealing effect.
In the present embodiment, described gripper shoe is rustless steel circular base slab, and described stainless steel shoe is used for tank body is vertical
Isolate and be divided into area is total tank body base area 3/4 and 1/4 two sub- tank bodies；Described area is that 3/4 sub- tank body is carried out
The electric heating joint degradation of winding model, described area is that 1/4 sub- tank body carries out the single thermal aging test of winding model.
In the present embodiment, described high pressure drainage system includes teflon rod 3, high pressure guide rod 5 and is used for fixing transformation
The high pressure rustless steel circle boatswain chair 8 of device high-pressure side winding, described high pressure guide rod is arranged in teflon rod, and described high pressure is led
Bar two ends are additionally provided with voltage equalizing ball, described high pressure guide rod be arranged on voltage equalizing ball in hermetically sealed can and high pressure rustless steel circle boatswain chair it
Between connected by high-voltage conducting wires.
In the present embodiment, described teflon rod and makes it expose in hermetically sealed can side is with 45 degree of inclination angle angle insertion tank
1/3.
In the present embodiment, described transformer winding model part include high-pressure side Transformer Winding, low-pressure end transformator around
Group, small-sized voltage equalizing ball, high-pressure side fixed screw, low-pressure end fixed screw and bandage；Described high-pressure side fixed screw is used for connecting
High-pressure side Transformer Winding is used for uniform high-pressure side Transformer Winding with high pressure rustless steel circle boatswain chair 8, described small-sized voltage equalizing ball
With the electric field of high pressure rustless steel circle boatswain chair junction, described low-pressure end fixed screw be used for connecting low-pressure end Transformer Winding with
Gripper shoe, described bandage is used for fixing high-pressure side Transformer Winding and low-pressure end Transformer Winding.
Comprised the following steps using the test method that the assay device that this is implemented carries out degradation:
S1: transformer oil and transformer winding model are dried；
S2: the good oil of pretreatment and transformer winding model are put in the space on hermetically sealed can baffle plate both sides, will be used for old
The hermetically sealed can changed is put in the ageing oven of constant temperature；
S3: connect circuit, high voltage is applied to the transformer winding model in hermetically sealed can, carry out the electric heating connection of winding model
Close burn-in test and single thermal ageing test.
In the present embodiment, in described step s1, dry run is specific as follows: first by oil with winding model in 90 DEG C/50pa
It is dried in environment 48 hours, subsequently put into winding model in oil and be dried 48 hours in 90 DEG C/50pa environment.
In the present embodiment, described step s2 detailed process is as follows: puts into winding model in two sub- tank bodies first, utilizes
High-voltage conducting wires connect high pressure drainage system and winding model in 3/4 sub- tank body, are then placed in the good transformer oil of pretreatment, lid
Top cover labyrinth, screwing hermetic tight loop, finally whole device is put in the ageing oven of constant temperature.
In the present embodiment, described step s3 detailed process is as follows: by the step-up side lead providing test high pressure even
It is connected to the ceramic insulator on ageing oven top, then connect ageing oven inner ceramic insulator leading-out terminal and hermetically sealed can side with lead
The voltage equalizing ball leading-out terminal in face simultaneously applies high pressure to ageing oven.
Finally illustrate, above example only in order to technical scheme to be described and unrestricted, although with reference to relatively
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, the objective without deviating from the technical program and scope, and it all should be covered in the present invention
Right in the middle of.
Claims (7)
1. a kind of Transformer Winding electric heating joint ageing test apparatus it is characterised in that: include for providing the close of ageing environment
Sealed cans, for supporting the gripper shoe of transformer winding model and for providing the high pressure drain of high voltage power supply and high-field electrode to fill
Put, described hermetically sealed can includes tank body, closure, sealing gasket and the sealing tight loop for being fastened on closure on tank body；Institute
The bottom surrounding of the opening surrounding and closure of stating tank body is provided with Baltimore groove, and described sealing gasket is arranged in Baltimore groove, described
Be additionally provided with baffle plate in tank body, described baffle plate be used for tank body vertical isolation and be divided into that area is total tank body base area 3/4
Sub- tank body and 1/4 sub- tank body with the 3/4 of 1/4, described gripper shoe and high pressure drainage system are arranged on 3/4 sub- tank body of described tank body
Side, described 3/4 sub- tank body carries out the electric heating joint degradation of transformer winding model, and described 1/4 sub- tank body enters line transformer
The single thermal aging test of winding model, described transformer winding model includes high-pressure side Transformer Winding and low-pressure end transformator
Winding, described high pressure drainage system includes teflon rod, high pressure guide rod and is used for fixing described high-pressure side Transformer Winding
High pressure rustless steel circle boatswain chair, described high pressure guide rod is arranged in teflon rod, and described high pressure guide rod two ends also set up
There is voltage equalizing ball, led by high pressure between the voltage equalizing ball that described high pressure guide rod is arranged in hermetically sealed can and high pressure rustless steel circle boatswain chair
Line connects, and described teflon rod and makes it expose 1/3 in hermetically sealed can side is with 45 degree of inclination angle angle insertion tank.
2. Transformer Winding electric heating according to claim 1 joint ageing test apparatus it is characterised in that: described gripper shoe
For rustless steel circular base slab, described baffle plate is corrosion resistant plate.
3. Transformer Winding electric heating according to claim 2 joint ageing test apparatus it is characterised in that: described transformator
Winding model also includes small-sized voltage equalizing ball, high-pressure side fixed screw, low-pressure end fixed screw and bandage；Described high-pressure side fixes spiral shell
Silk is used for connecting high-pressure side Transformer Winding with high pressure rustless steel circle boatswain chair, and described small-sized voltage equalizing ball is used for uniform high-pressure side and becomes
Depressor winding and the electric field of high pressure rustless steel circle boatswain chair junction, described low-pressure end fixed screw is used for connecting low-pressure end transformation
Device winding and gripper shoe, described bandage is used for fixing high-pressure side Transformer Winding and low-pressure end Transformer Winding.
4. carry out the test side of degradation using the Transformer Winding electric heating joint ageing test apparatus described in claim 3
Method it is characterised in that: comprise the following steps:
S1: transformer oil and transformer winding model are dried；
S2: the good oil of pretreatment and transformer winding model are put in the space on hermetically sealed can baffle plate both sides, aging by being used for
Hermetically sealed can is put in the ageing oven of constant temperature；
S3: connect circuit, high voltage is applied to the transformer winding model in hermetically sealed can, the electric heating joint carrying out winding model is old
Change test and single thermal aging test.
5. test method according to claim 4 it is characterised in that: in described step s1, dry run is specific as follows: first
First oil is dried 48 hours with transformer winding model in 90 DEG C/50pa environment, subsequently transformer winding model is put into oil
In in 90 DEG C/50pa environment be dried 48 hours.
6. test method according to claim 4 it is characterised in that: described step s2 detailed process is as follows: will become first
Depressor winding model is put in two sub- tank bodies, connects high pressure drainage system and transformation in 3/4 sub- tank body using high-voltage conducting wires
Device winding model, is then placed in the good transformer oil of pretreatment, covers closure, screwing hermetic tight loop, finally will entirely fill
Put in the ageing oven of constant temperature.
7. test method according to claim 4 it is characterised in that: described step s3 detailed process is as follows: by provide examination
The step-up side lead testing high pressure connects to the ceramic insulator on ageing oven top, is then connected inside ageing oven with lead
The voltage equalizing ball leading-out terminal of ceramic insulator leading-out terminal and hermetically sealed can side simultaneously applies high pressure to ageing oven.
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| CN201410426211.1A CN104181424B (en) | 2014-08-26 | 2014-08-26 | Test device and test method for electric heat joint aging of transformer winding |
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| CN201410426211.1A CN104181424B (en) | 2014-08-26 | 2014-08-26 | Test device and test method for electric heat joint aging of transformer winding |
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| CN104181424B true CN104181424B (en) | 2017-02-01 |
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| CN105759153B (en) * | 2016-04-22 | 2018-06-15 | 重庆大学 | A kind of thermal ageing test device and method under the conditions of analogue transformer winding overload |
| CN107843789B (en) * | 2017-11-02 | 2020-02-28 | 国家电网公司 | Integral aging test method for transformer winding |
| CN109655596B (en) * | 2018-12-14 | 2021-06-29 | 广州海洋地质调查局 | Multivariable condition seabed shallow layer gas leakage simulation method |
| CN109946548A (en) * | 2019-04-19 | 2019-06-28 | 国网四川省电力公司电力科学研究院 | A kind of electric heating joint aging equipment suitable for impacting electric capacity device polypropylene film |
| CN116430182B (en) * | 2023-04-20 | 2023-12-05 | 广东电网有限责任公司佛山供电局 | Evaluation method for insulation ageing resistance of dry-type distribution transformer winding |
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