CN109507545A - A kind of test method of the influence of temperature to dielectric spectroscopy - Google Patents
A kind of test method of the influence of temperature to dielectric spectroscopy Download PDFInfo
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- CN109507545A CN109507545A CN201811237250.1A CN201811237250A CN109507545A CN 109507545 A CN109507545 A CN 109507545A CN 201811237250 A CN201811237250 A CN 201811237250A CN 109507545 A CN109507545 A CN 109507545A
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- temperature
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- dielectric spectroscopy
- oil insulation
- paper oil
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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
- G01R31/12—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
- G01R31/1263—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 of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
-
- 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
- G01R31/16—Construction of testing vessels; Electrodes therefor
Abstract
A kind of test method of influence the invention discloses temperature to dielectric spectroscopy is related to transformer oil paper insulation state-detection field, comprising the following steps: S1, selection paper oil insulation sample；S2, multiple paper oil insulation samples are sealed respectively, then place and are stood in insulating box；S3, it determines maximum temperature to be tested, is set as initial temperature；S4, by the temperature setting of multiple insulating boxs it is initial temperature, after sealing and standing, dielectric spectroscopy test is carried out to multiple paper oil insulation samples respectively；S5, after S4 is measured, after the temperature difference that the temperature of multiple insulating boxs is reduced to setting, after sealing and standing, respectively in the insulating box after multiple coolings paper oil insulation sample carry out dielectric spectroscopy test；S6, S4 is repeated, the temperature after reduction stops test when being lower than room temperature.The method provided through the invention can regular simulation test temperature-fall period, follow-up study is conducive to the data of paper oil insulation sample dielectric spectroscopy.
Description
Technical field
The present invention relates to transformer oil paper insulation state-detection field more particularly to a kind of temperature to the shadow of dielectric spectroscopy
Loud test method.
Background technique
《Impact of temperature on the frequency domain dielectric
Spectroscopy for the diagnosis of power transformer insulation " and " Effects of
moisture and temperature on the frequency domain spectroscopy analysis of
Power transformer insulation " studies have shown that being situated between by the frequency domain of paper oil insulation sample under test different temperatures
Electricity spectrum, as the temperature increases, the telegram in reply in the low-frequency range of sample holds real and imaginary parts and significantly increases for discovery；In addition,
As temperature increases, telegram in reply holds real part and the crosspoint of imaginary part is mobile to high frequency region, intersects between dot frequency and temperature exponentially
Relationship."Frequency response of oil impregnated pressboard and paper samples for
Estimating moisture in transformer insulation " studies have shown that temperature, moisture and aging are equal to FDS
There is significant impact." the paper oil insulation status assessment based on return voltage curve " tests 20 oC, 30 oC, 50 oC, 70 o
The complex phase of paper oil insulation sample under C and 90 oC finds that complex phase exists to real part of permittivity to K dielectric spectral curve
10-3-10-1Increases in Hz frequency domain with the raising of measurement temperature, dielectric dissipation factor curve 100Hz or less with
It measures the raising of temperature and increases." the paper insulated amendment Cole-Cole model frequency domain dielectric characterization of transformer oil extracts and characteristic
Research " and " the time-frequency domain dielectric and space charge characteristic research of transformer oilpaper insulating thermal ageing " for transformer oil paper insulation
Sample is in a series of caloric test of labs, it is found that with the increase of test temperature, is tested paper oil insulation sample
The real part and imaginary part of multiple relative dielectric constant are mobile to high-frequency region.
Therefore research temperature is to the dielectric spectroscopy characteristic of different ageing states, different in moisture content paper oil insulation sample
It is highly desirable, can be studied by simulating live transformer.But since the frequency domain dielectric response of live transformer is surveyed
Examination is carried out after transformer stoppage in transit, and in this process, the internal temperature of transformer gradually decreases, therefore, for the scene of simulating
The temperature-fall period of transformer interior insulation needs to cool down to paper oil insulation sample, influence of the test temperature to dielectric spectroscopy,
Therefore a kind of test method of the influence of temperature to dielectric spectroscopy is needed.
Summary of the invention
The test method of influence the purpose of the present invention is to provide a kind of temperature to dielectric spectroscopy, to overcome existing
The shortcomings that either with or without temperature to the test method of the influence of dielectric spectroscopy.
To achieve the above object, the test method of the influence the present invention provides a kind of temperature to dielectric spectroscopy, including
Following steps:
S1, selection paper oil insulation sample；
S2, multiple paper oil insulation samples are sealed respectively, are placed after sealing and keep 12-48h in insulating box；
S3, it determines maximum temperature to be tested, sets initial temperature for the maximum temperature；
S4, by the temperature setting of multiple insulating boxs be initial temperature, reach flat to insulating oil and the moisture in insulating board
After weighing apparatus, i.e. after sealing and standing 12-48h, dielectric spectroscopy survey is carried out to the paper oil insulation sample in multiple insulating boxs respectively
Examination；
S5, after S4 is measured, after the temperature difference that the temperature of multiple insulating boxs is reduced to setting, sealing and standing 12-
After 48h, dielectric spectroscopy test is carried out to the paper oil insulation sample in the insulating box after multiple coolings respectively；
S6, S4 is repeated, the temperature after reduction stops test when being lower than room temperature.
Further, multiple paper oil insulation samples are that multiple ageing times are different, the identical oilpaper of moisture content is exhausted
Edge sample and the paper oil insulation sample that multiple ageing times are identical, moisture content is different.
Further, the room temperature is 5-30 DEG C.
Further, the maximum temperature is 130 DEG C.
Further, the temperature difference is 20-1 DEG C.
Further, the temperature difference is 15 DEG C.
Further, the time of the sealing and standing is 48h.
Further, the test scope of dielectric spectroscopy test is 1x10-3-5x10Hz。
Compared with prior art, the invention has the following beneficial effects:
1, the test method of influence of the temperature provided by the present invention to dielectric spectroscopy, is tried using paper oil insulation sample
It tests, rather than the paper oil insulation for directlying adopt transformer is equipped with, and is situated between to temperature to paper oil insulation frequency domain convenient for testing crew
The research of electricity spectrum；Keep 12-48h that can guarantee insulating oil and insulating paper with insulating box for placing after the sealing of paper oil insulation sample
Moisture in plate reaches balance, can be improved the accuracy of continuous measurement；The method provided through the invention being capable of regular mould
Quasi- test temperature-fall period is conducive to follow-up study to the data of paper oil insulation sample dielectric spectroscopy.
2, maximum temperature provided by the present invention is 130 DEG C, meets oil-immersed type transformer operation because room temperature is excessively high no more than
Maximum temperature；Room temperature is 5-30 DEG C, and the room temperature of different regions, Various Seasonal is different, therefore the temperature being arranged and reality
Temperature in transformer is identical, can be good at simulation cooling.
3, the time of sealing and standing provided by the present invention is 48h, and 48h, which can be good at reaching, guarantees insulating oil and insulating board
In moisture reach balance.
4, the test scope of dielectric spectroscopy of the invention test is 1x10-3- 5x10Hz more meets test dielectric spectroscopy
The frequency structure of test device, this test dielectric spectroscopy test device can be more acurrate to data test.
Specific embodiment
The technical solution in the present invention is clearly and completely described below, it is clear that described embodiment is only
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative labor, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of test method of the influence of temperature to dielectric spectroscopy the following steps are included:
S1,5 ageing time differences of selection, the identical paper oil insulation sample of moisture content and 5 ageing times are identical, moisture contains
Measure different paper oil insulation samples；It is tested using paper oil insulation sample, rather than directlys adopt the paper oil insulation of transformer
It is equipped with, the research convenient for testing crew to temperature to paper oil insulation dielectric spectroscopy；
S2,10 paper oil insulation samples are sealed respectively, after sealing place with insulating box in keep for 24 hours, to insulating oil with
After moisture in insulating board reaches balance；
S3, it determines that maximum temperature to be tested is 90 DEG C, sets 90 DEG C for maximum temperature；
S4, by the temperature setting of 10 insulating boxs be 90 DEG C, sealing and standing for 24 hours after, it is exhausted to the oilpaper in 10 insulating boxs respectively
Edge sample carries out dielectric spectroscopy test, and the test scope of dielectric spectroscopy test is 1x10-3-5x10Hz；
S5, after S4 is measured, after the temperature of 10 insulating boxs is reduced by 15 DEG C, sealing and standing for 24 hours after, respectively to 10
Paper oil insulation sample in insulating box after cooling carries out dielectric spectroscopy test；It will be placed and perseverance after the sealing of paper oil insulation sample
It keeps to guarantee that the moisture in insulating oil and insulating board reaches balance for 24 hours in incubator, can be improved the accuracy of continuous measurement；
S6, S4 is repeated, the temperature measured every time is respectively 90 DEG C, 75 DEG C, 60 DEG C, 45 DEG C, 30 DEG C and 15 DEG C, when measuring 13 DEG C
When stop test, simulation test temperature-fall period can be obtained, to paper oil insulation sample dielectric spectroscopy data be conducive to follow-up study
Research of the temperature to paper oil insulation, obtained dielectric modal data are as shown in Table 1 and Table 2.
The dielectric modal data that 1:5 ageing time of table is different, the identical paper oil insulation sample of moisture content measures
The dielectric modal data that the paper oil insulation sample that 2:5 ageing time of table is identical, moisture content is different measures
From table 1 and 2, it can be seen that in the case where mutually synthermal, identical ageing time, the higher paper oil insulation sample of moisture content
The corresponding dielectric dissipation factor of productIt is bigger.In the case where considerable moisture content, identical ageing time, temperature is higher
The corresponding dielectric dissipation factor of paper oil insulation sampleIt is bigger.In the case where mutually synthermal, considerable moisture content, when aging
Between the corresponding dielectric dissipation factor of longer paper oil insulation sampleIt is bigger.The temperature difference that the present embodiment uses for 15 DEG C,
It is then that temperature difference is big, obtained data have biggish difference, can be by smaller the going of temperature difference setting according to experiment demand
Test, or the different paper oil insulation samples with specific more different ageing times, different in moisture content of setting go to test,
It can obtain more specific accurate data.
Above disclosed is only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation or modification,
It is covered by the protection scope of the present invention.
Claims (8)
1. a kind of test method of influence of temperature to dielectric spectroscopy, it is characterised in that: the following steps are included:
S1, selection paper oil insulation sample；
S2, multiple paper oil insulation samples are sealed respectively, are placed after sealing and keep 12-48h in insulating box；
S3, it determines maximum temperature to be tested, sets initial temperature for the maximum temperature；
S4, by the temperature setting of multiple insulating boxs be initial temperature, reach flat to insulating oil and the moisture in insulating board
After weighing apparatus, dielectric spectroscopy test is carried out to the paper oil insulation sample in multiple insulating boxs respectively；
S5, after S4 is measured, after the temperature difference that the temperature of multiple insulating boxs is reduced to setting, sealing and standing 12-
After 48h, dielectric spectroscopy test is carried out to the paper oil insulation sample in the insulating box after multiple coolings respectively；
S6, S4 is repeated, the temperature after reduction stops test when being lower than room temperature.
2. the test method of influence of the temperature according to claim 1 to dielectric spectroscopy, it is characterised in that: multiple described
Paper oil insulation sample is different for multiple ageing times, the identical paper oil insulation sample of moisture content is identical with multiple ageing times,
The different paper oil insulation sample of moisture content.
3. the test method of influence of the temperature according to claim 1 to dielectric spectroscopy, it is characterised in that: the room temperature
It is 5-30 DEG C.
4. the test method of influence of the temperature according to claim 1 to dielectric spectroscopy, it is characterised in that: the highest
Temperature is 130 DEG C.
5. the test method of influence of the temperature according to claim 1 to dielectric spectroscopy, it is characterised in that: the temperature
Difference is 20-1 DEG C.
6. the test method of influence of the temperature according to claim 5 to dielectric spectroscopy, it is characterised in that: the temperature
Difference is 15 DEG C.
7. the test method of influence of the temperature according to claim 1 to dielectric spectroscopy, it is characterised in that: the sealing
The time of standing is 48h.
8. the test method of influence of the temperature according to claim 1 to dielectric spectroscopy, it is characterised in that: frequency domain dielectric
The test scope of spectrum test is 1x10-3-5x10Hz。
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901095A (en) * | 2019-04-16 | 2019-06-18 | 贵州电网有限责任公司 | Capacitor core measurement of electric parameter experimental rig and method under a kind of more influence factors |
| CN109917256A (en) * | 2019-04-27 | 2019-06-21 | 西南交通大学 | A kind of appraisal procedure of temperature change setting of casing capacitor core insulation performance |
| CN110598254A (en) * | 2019-08-14 | 2019-12-20 | 广西博电科技有限公司 | Translation factor-based temperature correction method for dielectric spectrum of solid insulation frequency domain of transformer |
| CN113358938A (en) * | 2021-05-14 | 2021-09-07 | 南通大学 | Rapid dielectric temperature spectrum testing method |
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| CN107941862A (en) * | 2017-10-17 | 2018-04-20 | 广西电网有限责任公司电力科学研究院 | A kind of transformer oil Aging of Oil-paper Insulation in Oil diagnostic system based on frequency domain dielectric response |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901095A (en) * | 2019-04-16 | 2019-06-18 | 贵州电网有限责任公司 | Capacitor core measurement of electric parameter experimental rig and method under a kind of more influence factors |
| CN109917256A (en) * | 2019-04-27 | 2019-06-21 | 西南交通大学 | A kind of appraisal procedure of temperature change setting of casing capacitor core insulation performance |
| CN109917256B (en) * | 2019-04-27 | 2020-06-02 | 西南交通大学 | Method for evaluating insulation performance of bushing capacitor core under temperature change |
| CN110598254A (en) * | 2019-08-14 | 2019-12-20 | 广西博电科技有限公司 | Translation factor-based temperature correction method for dielectric spectrum of solid insulation frequency domain of transformer |
| CN110598254B (en) * | 2019-08-14 | 2020-10-27 | 广西大学 | Translation factor-based temperature correction method for dielectric spectrum of solid insulation frequency domain of transformer |
| CN113358938A (en) * | 2021-05-14 | 2021-09-07 | 南通大学 | Rapid dielectric temperature spectrum testing method |
| CN113358938B (en) * | 2021-05-14 | 2022-04-19 | 南通大学 | Rapid dielectric temperature spectrum testing method |
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