CN205539288U - Simulate thermal ageing test device under transformer winding overload condition - Google Patents
Simulate thermal ageing test device under transformer winding overload condition Download PDFInfo
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- CN205539288U CN205539288U CN201620354578.1U CN201620354578U CN205539288U CN 205539288 U CN205539288 U CN 205539288U CN 201620354578 U CN201620354578 U CN 201620354578U CN 205539288 U CN205539288 U CN 205539288U
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- copper electrode
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Abstract
The utility model relates to a simulate thermal ageing test device under transformer winding overload condition belongs to insulating on -line monitoring of electrical equipment and failure diagnosis field. The device includes the seal pot, and copper electrode, breather valve, sensor support, seal pot are arranged in guaranteeing the sealed oxygen free condition that aging process transformer winding is in, and the copper electrode is used for conduction current and fixed transformer winding, and the breather valve is used for letting in the nitrogen gas exhaust air, and the sensor support is used for sensor installation, the regional oil temperature of the internal winding temperature of measuring tank and each. The utility model provides a simulate thermal ageing test device under transformer winding overload condition and method to the temperature is the target, flows through the mode that the winding current size reaches target temperature through the regulation and carries out oil -paper insulation thermal ageing test with higher speed. Thereby the ageing law of analysis transformer oil -paper insulation under the overload condition.
Description
Technical field
This utility model belongs to insulation of electrical installation on-line monitoring and fault diagnosis field, relates to a kind of analogue transformer winding overload
Under the conditions of thermal ageing test device.
Background technology
Power transformer is as the core of energy conversion in electric energy transmission and delivery process, and its accident caused that lost efficacy will cause electric power
The interruption of supply, and cause huge economic loss.Power transformer overload capability becomes restriction electrical network power transformation capacity limit simultaneously
The main cause that volume improves further, when the accident conditions of N-1 occurs in transformer station, if transformator has higher overload capacity, no
It is only capable of and avoids transformator to be damaged because of overload, additionally it is possible to reserve certain time to scheduling, by spatial load forecasting at safety and stability model
In enclosing " running limit of paired running main transformer can be effectively improved by improving transformer overload ability, improve main transformer rate of load condensate,
Operation to electricity net safety stable is significant ".
Transformator Oil-Paper Insulation is as the important component part of insulation in transformator, it transformer fault caused accounts for mainly
Ratio.Oilpaper affect by the factor such as electricity, heat, machinery, moisture and corrosion and the most aging in During Process of Long-term Operation, insulate
Hydraulic performance decline also causes insulation defect occur, even causes transformator main minor insulation fault, thus threatens the safe operation of transformator.
Transformator its hot(test)-spot temperature in an overload condition significantly improves, and its insulation ag(e)ing speed is aggravated, and laboratory uses acceleration old at present
Change the aging rule of technique study transformator Oil-Paper Insulation of test, its often with winding with insulating oil in certain oilpaper ratio
Carrying out by the mode heated without the temperature difference simultaneously, it is contemplated that transformer oil flash-point problem, its heating-up temperature is generally not capable of more than 140 DEG C.,
Transformator winding temperature rise in an overload condition can not be reacted the most all sidedly aging.
Utility model content
In view of this, the thermal ageing test dress under the conditions of the purpose of this utility model is to provide a kind of analogue transformer winding overload
Put and method, by with temperature as controlled quentity controlled variable, in closed environment by electric current flow through heating in winding to by the way of predetermined temperature
Carry out paper oil insulation accelerating thermal aging test.
The purpose of this utility model is to provide the thermal ageing test device under the conditions of a kind of analogue transformer winding overload, by following
Technical scheme realizes:
Thermal ageing test device under the conditions of a kind of analogue transformer winding overload, including hermetically sealed can, copper electrode, breather valve, passes
Sensor bracket；Breather valve opening, sensor insert port, and copper electrode opening, described ventilation it is provided with on the lid of described hermetically sealed can
Valve opening is used for installing breather valve, and described sensor insert port is used for installing sensor stand, described sensor stand is provided with
Sensor, described copper electrode opening is used for arranging copper electrode, and copper electrode uses epoxy resin fastener to carry out with the junction of hermetically sealed can
Compressing, described copper electrode is used for connecting tank body internal and external parts, conduction electric current and stationary transformer winding.
Further, described hermetically sealed can includes tank body, seals lid, seal washer and fastening clip, tank body opening surrounding and sealing
The bottom surrounding of lid is provided with Baltimore groove, and seal washer is placed in Baltimore groove, is used for ensureing that tank body is airtight with sealing lid.
Further, described breather valve is two, is separately positioned on the two ends, left and right of sealed tank cap, for carrying out air in tank body
Emptying process.
Further, described copper electrode is two, and each copper electrode is respectively adopted positive and negative at sealed tank cap of two epoxy resin fasteners
Face compresses, then is screwed by the screw thread of nut and copper electrode self.
Further, the upper and lower end parts of described copper electrode is respectively provided with hole, for through Transformer Winding, the upper and lower end parts of copper electrode
Vertical perforating tapping, connects with hole.
Further, described sensor stand includes vertical bar, some horizon bars and external member, and described horizon bar passes through external member with vertical
Bar connects；Described vertical bar provides for horizon bar and supports, the height of regulation horizon bar；Horizon bar is provided with perforate, is used for installing temperature
Degree sensor.
For reaching above-mentioned purpose, this utility model following technical scheme of offer:
The beneficial effects of the utility model are: the heat under the conditions of a kind of analogue transformer winding overload that this utility model provides is old
Change experimental provision, the device provides sealing and anaerobic experiment condition, it is ensured that test method can realize Transformer Winding and not surpass
Cross the degradation simulated in the case of transformer oil flash-point (140 DEG C) under the conditions of winding overload under higher temperature (>=140 DEG C),
Thus analyze transformator paper oil insulation aging rule in an overload condition.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, this utility model is made
Described in further detail, wherein:
Fig. 1 is the structural representation of device described in the utility model；
Fig. 2 is the structure chart of sealed shell of tank；
Fig. 3 is the mechanism map of sensor stand；
Wherein, 1 is breather valve, and 2 is sensor insert port, and 3 is epoxy resin fastener, and 4 is copper electrode, and 5 prop up for sensor
The vertical bar of frame, 6 is horizon bar and the external member of sensor stand, and 7 is sensor, and 8 is copper electrode perforate.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
This utility model provides the thermal ageing test device under the conditions of a kind of analogue transformer winding overload, and this device includes providing old
Change the rustless steel hermetically sealed can of environment, copper electrode, breather valve, sensor stand；Breather valve opening it is provided with on the lid of hermetically sealed can,
Sensor insert port, and copper electrode opening.
Hermetically sealed can includes tank body, seals lid, seal washer and fastening clip, tank body opening surrounding and the bottom surrounding sealing lid
Being provided with Baltimore groove, seal washer is placed in Baltimore groove, is used for ensureing that tank body is airtight with sealing lid, seals simple in construction, sealing
Effective.
Breather valve opening is used for installing breather valve, and breather valve is two, can be two ball valves, be separately positioned on sealed tank cap
Two ends, left and right, internal air nitrogen is discharged after having sealed by tank body, it is ensured that the anaerobic experiment condition in ageing process.
Sensor insert port is used for installing sensor stand, and sensor stand is provided with temperature sensor, bubble-tight in guarantee
On the basis of signal is derived, measure in real time winding and oil temperature temperature in tank.Sealing has covered two sensor insert ports.Sensor
Support includes vertical bar, some horizon bars and external member, and horizon bar is connected with vertical bar by external member；Can need to install according to measurement
Different number of horizontal stand.External member has substrate hold-down function copper ring for being threaded, and horizontal stand is connected with copper ring, and copper ring is with perpendicular
Straight-bar is connected as horizon bar and provides support, it is also possible to the height of regulation horizon bar；Horizon bar is provided with perforate, is used for installing temperature
Sensor.In experimentation, after copper winding technique is become given shape, be placed on ageing can seal after fixing with copper electrode is carried out
Energising heats up, and is monitored temperature and each region oil temperature of winding in tank body in real time by internal sensor simultaneously.
Opening is used for arranging copper electrode, and copper electrode uses epoxy resin fastener to compress with the junction of hermetically sealed can, and copper electrode is used
In connecting tank body internal and external parts, conduction electric current and stationary transformer winding, copper electrode is two, and each copper electrode is respectively adopted two
Individual epoxy resin fastener compresses at the positive and negative of sealed tank cap, is screwed by the screw thread of nut and copper electrode self, makes
Copper electrode carries out strong bonded with sealing lid.The upper and lower end parts of copper electrode is respectively provided with porose, is used for through the flat winding of transformator,
The upper and lower end parts vertical perforating tapping of copper electrode, connects with hole, and the copper winding that available screw is opposite in square hole compresses, and protects
Demonstrate,prove it to combine closely, strengthen its frame for movement stability.
The present embodiment additionally provides a kind of thermal ageing test method under the conditions of analogue transformer winding overload, specifically includes following step
Rapid:
Step 1) Transformer Winding is turned to given shape；
As required Transformer Winding is turned to both shaped, as turned to three-layer type winding, joining end to end of its each layer
Ensureing that electric current continues through, identical with layer winding temperature in ageing process, different layers temperature is different, therefore can be at experimentation
In three kinds of different test temperatures carry out aging；Therefore three different temperatures can be obtained in experimentation in single test
Under aging.
Step 2) transformer oil and transformer insulated winding are dried process.
Dried specifically includes following steps: step 21) by oil with Transformer Winding in 90 DEG C/50Pa environment, be dried 48
Hour；Step 22) Transformer Winding is put in oil, immersion oil 24 hours in 40 DEG C/50Pa environment.
Step 3) winding copper cash is put in hermetically sealed can, it is connected with the copper electrode being arranged in hermetically sealed can, sensor is placed in
Winding precalculated position.Copper electrode is used for connecting tank body internal and external parts, conduction electric current and stationary transformer winding.
Step 4) by through step 2) transformer oil that processed pours in tank body, Transformer Winding is dipped in oil, and regulation is arranged on
Sensor stand position in hermetically sealed can, closes the lid, and reinforces and seals；
Step 5) air in hermetically sealed can is discharged；The air in hermetically sealed can is discharged by input high-purity nitrogen, hermetically sealed can
Top is provided with two breather valve, and a breather valve is used for inputting nitrogen, and another breather valve is used for air-out.
Step 6) copper electrode is energized, make winding self-heating, carry out degradation.Electric current passes through strong current generator
Produce, flowed out by another pole again after winding makes it generate heat again by sealing the copper electrode inflow of lid exposed parts, form loop.
Carry out temperature is controlled by internal sensor, it is ensured that ageing environment temperature is consistent.
Finally illustrating, preferred embodiment above is only in order to illustrate the technical solution of the utility model and unrestricted, although passing through
This utility model is described in detail by above preferred embodiment, it is to be understood by those skilled in the art that can be
In form and it is made various change, without departing from this utility model claims limited range in details.
Claims (6)
1. the thermal ageing test device under the conditions of an analogue transformer winding overload, it is characterised in that: include hermetically sealed can, copper electrode,
Breather valve, sensor stand；Breather valve opening, sensor insert port, and copper electrode it is provided with on the lid of described hermetically sealed can
Opening, described breather valve opening is used for installing breather valve, and described sensor insert port is used for installing sensor stand, described
Being provided with sensor fastening device on sensor stand, described copper electrode opening is used for arranging copper electrode, copper electrode and sealing
The junction of tank uses epoxy resin fastener to compress, and described copper electrode is used for connecting tank body internal and external parts, conducts electric current
With stationary transformer winding.
Thermal ageing test device under the conditions of a kind of analogue transformer winding overload the most according to claim 1, it is characterised in that:
Described hermetically sealed can includes tank body, seals lid, seal washer and fastening clip, tank body opening surrounding and the bottom sealing lid
Surrounding is provided with Baltimore groove, and seal washer is placed in Baltimore groove, is used for ensureing that tank body is airtight with sealing lid.
Thermal ageing test device under the conditions of a kind of analogue transformer winding overload the most according to claim 1, it is characterised in that:
Described breather valve is two, is separately positioned on the two ends, left and right of sealed tank cap, for air in tank body is carried out emptying process.
Thermal ageing test device under the conditions of a kind of analogue transformer winding overload the most according to claim 1, it is characterised in that:
Described copper electrode is two, and each copper electrode is respectively adopted two epoxy resin fasteners and presses at the positive and negative of sealed tank cap
Tightly, then by the screw thread of nut and copper electrode self screw.
Thermal ageing test device under the conditions of a kind of analogue transformer winding overload the most according to claim 1, it is characterised in that:
The upper and lower end parts of described copper electrode is respectively provided with porose, and for through Transformer Winding, the upper and lower end parts of copper electrode is vertically beaten
Hole tapping, connects with hole.
Thermal ageing test device under the conditions of a kind of analogue transformer winding overload the most according to claim 1, it is characterised in that:
Described sensor stand includes vertical bar, some horizon bars and external member, and described horizon bar is connected with vertical bar by external member；
Described vertical bar provides for horizon bar and supports, the height of regulation horizon bar；Horizon bar is provided with perforate, is used for installing temperature and passes
Sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620354578.1U CN205539288U (en) | 2016-04-22 | 2016-04-22 | Simulate thermal ageing test device under transformer winding overload condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620354578.1U CN205539288U (en) | 2016-04-22 | 2016-04-22 | Simulate thermal ageing test device under transformer winding overload condition |
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| Publication Number | Publication Date |
|---|---|
| CN205539288U true CN205539288U (en) | 2016-08-31 |
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| CN201620354578.1U Active CN205539288U (en) | 2016-04-22 | 2016-04-22 | Simulate thermal ageing test device under transformer winding overload condition |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759153A (en) * | 2016-04-22 | 2016-07-13 | 重庆大学 | Thermal aging experiment device of simulating transformer winding overload condition and method thereof |
| CN108089038A (en) * | 2017-12-22 | 2018-05-29 | 重庆大学 | The experimental rig and method that analysis winding defect pyrogenicity influences paper oil insulation performance |
| CN109085198A (en) * | 2018-07-27 | 2018-12-25 | 昆明理工大学 | A kind of experimental provision and application method measuring transformer oil convection transfer rate |
| CN109188216A (en) * | 2018-08-24 | 2019-01-11 | 西南交通大学 | A kind of experimental method of transformer winding insulation ag(e)ing status assessment research |
| CN112269077A (en) * | 2020-10-10 | 2021-01-26 | 苏州中康电力运营有限公司 | Testing device and testing method for oil-immersed transformer |
| CN113687202A (en) * | 2021-08-31 | 2021-11-23 | 广东电网有限责任公司 | Experimental device and experimental method for simulating aging of insulating paper |
-
2016
- 2016-04-22 CN CN201620354578.1U patent/CN205539288U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759153A (en) * | 2016-04-22 | 2016-07-13 | 重庆大学 | Thermal aging experiment device of simulating transformer winding overload condition and method thereof |
| 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 |
| CN108089038A (en) * | 2017-12-22 | 2018-05-29 | 重庆大学 | The experimental rig and method that analysis winding defect pyrogenicity influences paper oil insulation performance |
| CN108089038B (en) * | 2017-12-22 | 2020-03-17 | 重庆大学 | Test device and method for analyzing influence of winding defect heating on oil paper insulation performance |
| CN109085198A (en) * | 2018-07-27 | 2018-12-25 | 昆明理工大学 | A kind of experimental provision and application method measuring transformer oil convection transfer rate |
| CN109188216A (en) * | 2018-08-24 | 2019-01-11 | 西南交通大学 | A kind of experimental method of transformer winding insulation ag(e)ing status assessment research |
| CN109188216B (en) * | 2018-08-24 | 2019-07-12 | 西南交通大学 | A kind of experimental method of transformer winding insulation ag(e)ing status assessment research |
| CN112269077A (en) * | 2020-10-10 | 2021-01-26 | 苏州中康电力运营有限公司 | Testing device and testing method for oil-immersed transformer |
| CN113687202A (en) * | 2021-08-31 | 2021-11-23 | 广东电网有限责任公司 | Experimental device and experimental method for simulating aging of insulating paper |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |