CN107561419B - A kind of appraisal procedure of oil-immersed sleeve pipe insulation bubble effect risk - Google Patents
A kind of appraisal procedure of oil-immersed sleeve pipe insulation bubble effect risk Download PDFInfo
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- CN107561419B CN107561419B CN201710738032.5A CN201710738032A CN107561419B CN 107561419 B CN107561419 B CN 107561419B CN 201710738032 A CN201710738032 A CN 201710738032A CN 107561419 B CN107561419 B CN 107561419B
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Abstract
The invention discloses a kind of appraisal procedure of oil-immersed sleeve pipe insulation bubble effect risk, steps are as follows: 1) assessment prepares and test wiring；2) opposite complex dielectric permittivity imaginary part is tested；3) it is fitted the test result of opposite complex dielectric permittivity imaginary part；4) estimation set pipe insulation moisture content；5) estimated temperature T traps water vapor partial pressure in pipe insulation；6) risk of assessment oil-immersed sleeve pipe insulation bubble effect.The present invention it can be considered that oil-immersed sleeve pipe influence of the aging to water vapor partial pressure in insulation, assessment oil-immersed sleeve pipe that can be more accurate insulate bubble effect risk.
Description
Technical field
The invention belongs to oil-immersed sleeve pipe insulation fault risk assessment fields, and in particular to a kind of oil-immersed sleeve pipe insulation gas
Steep the appraisal procedure of effect risk.
Background technique
Oil-immersed sleeve pipe is one of important auxiliary device of transformer, belongs to the important equipment of electric system, and playing will be high
The effect that low-voltage lead is drawn from inside transformer, the connection for realizing transformer and external electrical network and lead are to transformer
The insulation of shell.Oil-immersed sleeve pipe major insulation is insulating paper and aluminium foil capacitance plate alternating packets around the capacitor core rolled.Practical fortune
Even if the good casing of leakproofness in row, moisture also can by by army cap, take the exemplary positions such as plug cock, conservator invade casing in
Portion, when the water vapor partial pressure in casing operational process when running temperature and insulation moisture content reach critical value, in set pipe insulation
It can be more than critical value, the micro- water covered in pipe insulation can be precipitated in the form of bubble, this not only will cause casing insulation electric field
Distortion, also will increase the pressure of inside pipe casing, the explosion of casing can be especially directly contributed when precipitation process is especially violent, at present
It there is no effective monitoring means and method in actual production.In addition to this with the operation of casing, pipe insulation gradually aging is covered, always
Changing to generate the absorption of moisture to insulation significantly influences, and then increases accurate evaluation oil-immersed sleeve pipe insulation bubble effect
Risk difficulty.Therefore, it in order to more accurately assess the risk of oil-immersed sleeve pipe insulation bubble effect, needs further
Consider influence of the aging to insulation wettability power, is badly in need of a kind of appraisal procedure of oil-immersed sleeve pipe insulation bubble effect risk.
Summary of the invention
In order to more accurately assess the risk of oil-immersed sleeve pipe insulation bubble effect, and further consider aging pair
The influence of insulation wettability power, the present invention provides a kind of appraisal procedures of oil-immersed sleeve pipe insulation bubble effect risk.
A kind of appraisal procedure of oil-immersed sleeve pipe insulation bubble effect risk comprises the steps of:
Step 1: assessment prepares and test wiring
It checks oil-immersed sleeve pipe nameplate to be assessed or factory report, records having put into operation the time for oil-immersed sleeve pipe to be assessed
The high-voltage end of opposite complex dielectric permittivity imaginary part tester is connected by (being denoted as N) with casing conservator leading-out terminal, will answer dielectric relatively
The low-pressure end of constant imaginary part tester is connected with bottom shielding of bushing lead-out wire, by the ground terminal of opposite complex dielectric permittivity imaginary part tester
It is connected with casing flange earthing or grounding means, the temperature for testing and recording test protheca pipe insulation is T (degree Celsius)；
Step 2: opposite complex dielectric permittivity imaginary part is tested
Being arranged the output voltage of opposite complex dielectric permittivity imaginary part tester is 1400 volts, and setting test frequency range is
0.01Hz to 1mHz (each test frequency point f includes 1mHz, 2mHz, 4mHz, 0.01Hz), unlatching will be with respect to complex dielectric permittivity imaginary part
Tester carries out opposite complex dielectric permittivity imaginary part frequency domain spectra to casing and tests, and obtains the opposite complex dielectric permittivity imaginary part test of casing
As a result (0.01Hz Frequency point test result is denoted as ε1", 4mHz Frequency point test result is denoted as ε2", 2mHz Frequency point test result
It is denoted as ε3", 1mHz Frequency point test result is denoted as ε4″)；
Step 3: test result of the fitting to complex dielectric permittivity imaginary part
The opposite complex dielectric permittivity imaginary part test result of casing is converted into logarithmic coordinates system, formula (1) institute is then based on
The straight line expression formula fitting test result shown, and then obtain the slope s and intercept b of straight line expression formula shown in formula (1)；
Y=sx+b (1)
Y is log ε " in formula (1), and x is log ω, and ω is to survey the angular frequency value of each examination Frequency point and be equal to 2 π f；
Step 4: estimation set pipe insulation moisture content
Content m.c. based on moisture in formula (2) estimation casing insulating paper
M.c.=1.79 × (A-s-0.74)0.41 (2)
A is volume iron core tractive transformer dielectric characterization parameter in formula (2), shown in the estimation formula such as formula (3) of A
The water vapor partial pressure in pipe insulation step 5: estimated temperature T traps
When temperature T is greater than 100 degrees Celsius, trapped water vapor partial pressure p (unit in pipe insulation according to formula (4) estimated temperature T
atm)
M is aging coefficient in formula (4), and M is estimated shown in formula such as formula (5):
Step 6: the risk of assessment oil-immersed sleeve pipe insulation bubble effect
Set critical pressure value PL, it is then based on the water vapor partial pressure value p that the 5th step is estimated, calculates wind by formula (6)
Dangerous coefficient H, and then assessment is made to the risk of oil-immersed sleeve pipe insulation bubble effect, it is pre- that risk is issued when H is greater than 0.632
It is alert
K is Risk-warning parameter in formula (6), is set according to actual needs for a constant.
Detailed description of the invention
A kind of appraisal procedure flow chart of oil-immersed sleeve pipe insulation bubble effect risk of Fig. 1
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
Fig. 1 show a kind of appraisal procedure flow chart of oil-immersed sleeve pipe insulation bubble effect risk.It can from Fig. 1
A kind of appraisal procedure of oil-immersed sleeve pipe insulation bubble effect risk mainly comprises the steps that out
Step 1: assessment prepares and test wiring
It checks oil-immersed sleeve pipe nameplate to be assessed or factory report, records having put into operation the time for oil-immersed sleeve pipe to be assessed
The high-voltage end of opposite complex dielectric permittivity imaginary part tester is connected by (being denoted as N) with casing conservator leading-out terminal, will answer dielectric relatively
The low-pressure end of constant imaginary part tester is connected with bottom shielding of bushing lead-out wire, by the ground terminal of opposite complex dielectric permittivity imaginary part tester
It is connected with casing flange earthing or grounding means, the temperature for testing and recording test protheca pipe insulation is T (degree Celsius)；
Step 2: opposite complex dielectric permittivity imaginary part is tested
Being arranged the output voltage of opposite complex dielectric permittivity imaginary part tester is 1400 volts, and setting test frequency range is
0.01Hz to 1mHz (each test frequency point f includes 1mHz, 2mHz, 4mHz, 0.01Hz), unlatching will be with respect to complex dielectric permittivity imaginary part
Tester carries out opposite complex dielectric permittivity imaginary part frequency domain spectra to casing and tests, and obtains the opposite complex dielectric permittivity imaginary part test of casing
As a result (0.01Hz Frequency point test result is denoted as ε1", 4mHz Frequency point test result is denoted as ε2", 2mHz Frequency point test result
It is denoted as ε3", 1mHz Frequency point test result is denoted as ε4″)；
Step 3: test result of the fitting to complex dielectric permittivity imaginary part
The opposite complex dielectric permittivity imaginary part test result of casing is converted into logarithmic coordinates system, formula (1) institute is then based on
The straight line expression formula fitting test result shown, and then obtain the slope s and intercept b of straight line expression formula shown in formula (1)；
Y=sx+b (1)
Y is log ε " in formula (1), and x is log ω, and ω is to survey the angular frequency value of each examination Frequency point and be equal to 2 π f；
Step 4: estimation set pipe insulation moisture content
Content m.c. based on moisture in formula (2) estimation casing insulating paper
M.c.=1.79 × (A-s-0.74)0.41 (2)
A is volume iron core tractive transformer dielectric characterization parameter in formula (2), shown in the estimation formula such as formula (3) of A
The water vapor partial pressure in pipe insulation step 5: estimated temperature T traps
When temperature T is greater than 100 degrees Celsius, trapped water vapor partial pressure p (unit in pipe insulation according to formula (4) estimated temperature T
atm)
M is aging coefficient in formula (4), and M is estimated shown in formula such as formula (5):
Step 6: the risk of assessment oil-immersed sleeve pipe insulation bubble effect
Set critical pressure value PLFor 1.6atm, Risk-warning parameter k is set as 0.8, the 5th step is then based on and estimates
The water vapor partial pressure value p arrived makes by formula (6) calculation risk coefficient H, and then to the risk of oil-immersed sleeve pipe insulation bubble effect
Assessment issues Risk-warning when H is greater than 0.632.
Claims (1)
1. a kind of test method of oil-immersed sleeve pipe insulation bubble effect, which is characterized in that comprise the steps of:
Step 1: assessment prepares and test wiring
It checks oil-immersed sleeve pipe nameplate to be assessed or factory report, records having put into operation the time for oil-immersed sleeve pipe to be assessed, be denoted as N
Year, the high-voltage end of opposite complex dielectric permittivity imaginary part tester is connected with casing conservator leading-out terminal, it will be with respect to complex dielectric permittivity void
The low-pressure end of portion's tester is connected with bottom shielding of bushing lead-out wire, by the ground terminal and casing of opposite complex dielectric permittivity imaginary part tester
Flange earthing or grounding means is connected, and the temperature for testing and recording test protheca pipe insulation is T, and unit is degree Celsius；
Step 2: opposite complex dielectric permittivity imaginary part is tested
Being arranged the output voltage of opposite complex dielectric permittivity imaginary part tester is 1400 volts, and setting test frequency range is
0.001Hz to 0.01Hz, each test frequency point f is respectively 0.001Hz, 0.002Hz, 0.004Hz, 0.01Hz, and unlatching will be opposite
Complex dielectric permittivity imaginary part tester carries out opposite complex dielectric permittivity imaginary part frequency domain spectra to casing and tests, and obtains the relatively multiple of casing and is situated between
Electric constant imaginary part test result, 0.001Hz Frequency point test result are denoted as ε1", 0.002Hz Frequency point test result is denoted as ε2",
0.004Hz Frequency point test result is denoted as ε3", 0.01Hz Frequency point test result is denoted as ε4″；
Step 3: test result of the fitting to complex dielectric permittivity imaginary part
The opposite complex dielectric permittivity imaginary part test result of casing is converted into logarithmic coordinates system, is then based on shown in formula (1)
Straight line expression formula is fitted test result, and then obtains the slope s and intercept b of straight line expression formula shown in formula (1)；
Y=sx+b (1)
Y is log ε " in formula (1), and ε " is the imaginary values of opposite complex dielectric permittivity, and x is log ω, and ω is the angle for surveying each examination Frequency point
Frequency values and be equal to 2 π f；
Step 4: estimation set pipe insulation moisture content
Content m.c. based on moisture in formula (2) estimation casing insulating paper
M.c.=1.79 × (A-s-0.74)0.41 (2)
A is volume iron core tractive transformer dielectric characterization parameter in formula (2), shown in the estimation formula such as formula (3) of A
The water vapor partial pressure in pipe insulation step 5: estimated temperature T traps
When temperature T is greater than 100 degrees Celsius, trapped water vapor partial pressure p, unit atm in pipe insulation according to formula (4) estimated temperature T,
M is aging coefficient in formula (4), and M is estimated shown in formula such as formula (5):
Step 6: the test of oil-immersed sleeve pipe insulation bubble effect
Set critical pressure value PL, it is then based on the water vapor partial pressure value p that the 5th step is estimated, passes through formula (6) calculation risk coefficient
H, and then oil-immersed sleeve pipe insulation bubble effect is tested,
K is Risk-warning parameter in formula (6), is set according to actual needs for a constant.
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| CN108919058B (en) * | 2018-08-22 | 2019-08-06 | 西南交通大学 | The simulation of cable radial direction damage fault and test method under a kind of temperature gradient |
| CN109917254B (en) * | 2019-04-27 | 2020-04-03 | 西南交通大学 | Frequency domain dielectric spectrum modeling method for insulating and damping in oil-immersed bushing |
| CN111366825A (en) * | 2020-04-13 | 2020-07-03 | 国网陕西省电力公司电力科学研究院 | Transformer bushing thermal bubble simulation generation device and initial temperature measurement method |
| CN113917293A (en) * | 2021-09-24 | 2022-01-11 | 广东电网有限责任公司广州供电局 | Method and system for evaluating insulation aging state of high-voltage dry-type sleeve based on frequency domain and time domain |
| CN113985012B (en) * | 2021-10-27 | 2024-04-12 | 中电华创电力技术研究有限公司 | Mineral turbine oil degradation risk assessment method |
| CN115308543B (en) * | 2022-08-03 | 2023-12-22 | 重庆大学 | Method for determining waveform parameter range with maximum influence on air insulation fault risk rate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158655A (en) * | 2015-08-24 | 2015-12-16 | 江苏大学 | Frequency-domain dielectric theory-based evaluation method for evaluating insulation aging state of oiled paper of transformer |
| CN105425076A (en) * | 2015-12-11 | 2016-03-23 | 厦门理工学院 | Method of carrying out transformer fault identification based on BP neural network algorithm |
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| CN102818974B (en) * | 2012-07-13 | 2015-07-29 | 云南电力试验研究院（集团）有限公司电力研究院 | A kind of method assessing transformer major insulation degree of aging |
| US9482699B2 (en) * | 2013-06-18 | 2016-11-01 | Advanced Power Technologies, Llc | Method and apparatus for monitoring high voltage bushings safely |
| CN103308835A (en) * | 2013-06-27 | 2013-09-18 | 深圳供电局有限公司 | Method and device for detecting insulation aging state of oil paper insulation power equipment |
| CN103983904B (en) * | 2014-06-09 | 2016-10-19 | 重庆大学 | The oil piping system of suspended microbubble partial discharge simulation experiment device in transformer oil |
| CN104569753A (en) * | 2014-12-26 | 2015-04-29 | 国家电网公司 | Detection circuit and system used for discharge of bubbles in transformer oil |
| CN105467279B (en) * | 2015-03-16 | 2018-12-18 | 华北电力大学 | A kind of inside transformer bubble electric discharge model |
| CN105606966A (en) * | 2015-12-21 | 2016-05-25 | 安徽理工大学 | Partial discharge pattern recognition method based on mixed neural network algorithm |
| CN106990342A (en) * | 2017-06-08 | 2017-07-28 | 重庆大学 | A kind of method of Oil-impregnated Paper Condenser Bushing in History effect of electromagnetic field test |
-
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158655A (en) * | 2015-08-24 | 2015-12-16 | 江苏大学 | Frequency-domain dielectric theory-based evaluation method for evaluating insulation aging state of oiled paper of transformer |
| CN105425076A (en) * | 2015-12-11 | 2016-03-23 | 厦门理工学院 | Method of carrying out transformer fault identification based on BP neural network algorithm |
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