CN109116154A - A kind of experimental method of winding model humidified insulation and Aging Assessment research - Google Patents
A kind of experimental method of winding model humidified insulation and Aging Assessment research Download PDFInfo
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- CN109116154A CN109116154A CN201810970441.2A CN201810970441A CN109116154A CN 109116154 A CN109116154 A CN 109116154A CN 201810970441 A CN201810970441 A CN 201810970441A CN 109116154 A CN109116154 A CN 109116154A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2617—Measuring dielectric properties, e.g. constants
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Housings And Mounting Of Transformers (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses the experimental methods that a kind of winding model humidified insulation and Aging Assessment are studied, experiment porch is built first, then the winding model of different dampness and degree of aging is prepared, and then obtain the dielectric spectroscopy diagram database of winding model different dampness and degree of aging under fiducial temperature, dielectric spectroscopy test and reduction are carried out to the winding model of unknown damp degree and degree of aging, it is compared using similarity and the dielectric spectroscopy curve in database, finally obtains the damp degree and degree of aging of unknown winding model.The experimental method establishes winding model difference dampness and the dielectric spectroscopy database of degree of aging effectively assesses the damp degree and degree of aging of winding, can provide reference for the dampness and degree of aging evaluation studies of transformer winding.
Description
Technical field
The invention belongs to transformer winding Condition assessment of insulation research fields, and in particular to a kind of winding model humidified insulation
With the experimental method of Aging Assessment research.
Background technique
Transformer is the core equipment in electric system, and the quality of insulation performance affects the safety of Operation of Electric Systems
With stabilization.In the operation of the transformer, transformer winding is influenced by moisture, temperature, high-intensity magnetic field and electric field for a long time, is caused
Its state of insulation constantly changes, and brings hidden danger to the safe and stable operation of electric system, therefore need in the operation of the transformer
Damp degree and degree of aging to its winding carry out accurate status monitoring.
It mainly include at present insulation resistance, medium damage to the detection method of damp degree in transformer winding and degree of aging
Factor, partial discharge quantity and oil dissolved gas etc. are consumed, but insulation resistance, dielectric dissipation factor and partial discharge quantity include letter
Breath amount is less and poor to moisture-sensitive degree, cannot reflect the state of insulation of oil-immersed transformer casing, oil dissolved gas point comprehensively
Analysis will receive the influence changed oil.Dielectric spectroscopy method based on dielectric response theory is a kind of emerging, lossless exhausted
Edge diagnostic method, and have many advantages, such as strong antijamming capability, abundant information is carried, transformer winding state inspection is widely used in
Survey field.But current dielectric spectroscopy test result can only carry out comprehensive assessment, Wu Faqu to transformer winding state of insulation
Divide the damp degree and degree of aging of transformer winding.In order to more efficiently assess transformer winding state of insulation,
The winding dielectric spectroscopy database of different agings and damp degree need to be established, the foundation of the database needs one kind to be able to achieve not
With the experimental method that aging and damp degree winding dielectric spectroscopy are tested, therefore it is badly in need of a kind of winding model humidified insulation and old
Change the experimental method of evaluation studies.
Summary of the invention
In order to effectively assess the humidified insulation degree and degree of aging of winding model, the present invention provides a kind of windings
The experimental method of model humidified insulation and Aging Assessment research, comprising the following steps:
Step 1: building experiment porch
The experiment porch of winding model humidified insulation and Aging Assessment research, including transformer high-voltage winding (3), transformer
Low pressure winding (4), heating wire (7), experimental box (1), temperature control system (9), humidity control system (13), dielectric spectra tester
(8), terminating machine (14), insulating oil (2) liquid level in experimental box (1) be higher than transformer high-voltage winding (3) and transformer low voltage around
Group (4), transformer high-voltage winding (3) and transformer low voltage winding (4) be replaced by the transformer high-voltages of different degree of agings around
Group (3) and transformer low voltage winding (4), in interior bottom surrounding winding heating wire (7) of insulation fuel tank (1), the first temperature sensor
(5a) and second temperature sensor (5b), which are placed in insulation fuel tank (1), monitors insulating oil (2) temperature in real time, and temperature data is passed
It send to temperature control system (9), temperature control system (9) sends temperature data uploading to terminating machine (14), terminating machine (14)
Instruction cut-offs to guarantee to insulate to temperature control system (9) by the power supply of temperature control system (9) control heating wire (7)
Fuel tank (1) is in temperature constant state, and the first moisture transducer (6a) and the second moisture transducer (6b) are placed in real in insulation fuel tank (1)
When monitor insulating oil (2) interior moisture content, moisture data is sent to humidity control system (13), humidity control system (13) will
Humidity data is uploaded to terminating machine (14), obtains insulating paper moisture content by paper oil insulation stable state micro hydropower cloth curve, and eventually
Terminal (14) sends a command to humidity control system (13), passes through humidity control system (13) control humidifier (12) and air pump
(11) moisture is delivered in experimental box (1) through conduit (10), reach control transformer high-voltage winding (3) and transformer low voltage around
The purpose of group (4) interior moisture content, dielectric spectra tester (8) high pressure terminate transformer high-voltage winding (3), and low pressure terminates transformer
Low pressure winding (4), the dielectric spectral curve of test are uploaded to terminating machine (14) storage analysis；
Step 2: preparing the winding of different agings and damp degree
Opening temperature control system (9) controls the temperature in experimental box (1) in fiducial temperature T0, unit is DEG C；It opens
Humidity control system (13) is obtained by the first moisture transducer (6a) in experimental box (1) and the second moisture transducer (6b)
Moisture data is sent to humidity control system (13) by moisture content in insulating oil (2), and humidity control system (13) is by water fraction
According to terminating machine (14) are uploaded to, insulating paper moisture content, terminating machine (14) are obtained by paper oil insulation stable state micro hydropower cloth curve
Humidity control system (13) humidification process different degrees of to the progress in experimental box (1) is sent a command to, different agings are obtained
With the transformer high-voltage winding (3) and transformer low voltage winding (4) of damp degree；
Step 3: establishing the dielectric spectroscopy database of different agings and damp degree
Open dielectric spectra tester (8), applications voltage be 1400V, test frequency point be 0.001Hz, 0.0022Hz,
0.0046Hz、0.01Hz、0.22Hz、0.46Hz、1Hz、2Hz、5Hz、10Hz、20Hz、40Hz、70Hz、110Hz、220Hz、
470Hz and 1000Hz is tested in fiducial temperature T0Lower difference degree of aging, different damp degree transformer winding be situated between again relatively
The dielectric spectroscopy of electric constant real part (ε ') and opposite complex dielectric permittivity imaginary part (ε "), is uploaded to terminating machine for test result
(14), the transformer winding dielectric spectroscopy testing standard database of different degree of agings, different damp degrees is established；
Step 4: dielectric spectroscopy test and reduction
It opens dielectric spectroscopy tester (8), the opposite complex dielectric permittivity for testing the winding of unknown aging damp degree is real
The dielectric spectroscopy in portion (ε ') and opposite complex dielectric permittivity imaginary part (ε "), test environment temperature are T, unit for DEG C, will be in environment
Temperature is the dielectric spectroscopy test result reduction of the winding of the unknown aging damp degree of T to fiducial temperature T0Under, it counts first
It calculates insulating oil relaxation process activation energy and dielectric spectra reduction refers to preceding parameter alpha:
In formula, R is Boltzmann constant, fTFor the test frequency of dielectric spectroscopy under environment temperature T, fT0For reference temperature
T0Under corresponding Frequency point, according to above formula calculate reduction to reference temperature under opposite complex dielectric permittivity (ε ') with relatively again dielectric
Constant imaginary part (ε "):
Step 5: by environment temperature be T unknown aging damp degree winding dielectric spectroscopy test result with
Curve in standard database calculates similarity one by one, and the corresponding database winding state of similarity maximum value is the winding aging
And damp degree, the calculating of similarity are as follows:
In formula, f0kFor reduction to reference temperature T0The kth point test value of dielectric spectroscopy afterwards, fikFor in standard database
I-th dielectric spectroscopy test curve kth point test value.
The present invention has the advantages that
The present invention provides the experimental methods that a kind of winding model humidified insulation and Aging Assessment are studied, and build experiment first
Platform, then prepare it is different dampness and degree of aging winding models, and then obtain winding model under fiducial temperature difference by
The dielectric spectroscopy diagram database of tide and degree of aging carries out frequency domain to the winding model of unknown damp degree and degree of aging
Dielectric spectra test and reduction, compared using similarity and the dielectric spectroscopy curve in database, finally obtain it is unknown around
The damp degree and degree of aging of group model.The experimental method by establish it is different dampness and degree of aging winding model frequency domain
Dielectric spectra database effectively assesses the damp degree and degree of aging of winding, can be the dampness of transformer winding and old
Change scale evaluation research and reference is provided.
Detailed description of the invention
The experiment porch schematic diagram of a kind of winding model humidified insulation of Fig. 1 and Aging Assessment research
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
Fig. 1 show the experiment porch schematic diagram of a kind of winding model humidified insulation and Aging Assessment research.It can from Fig. 1
To find out that a kind of winding model humidified insulation and the experimental method of Aging Assessment research mainly comprise the steps that
Step 1: building experiment porch
The experiment porch of winding model humidified insulation and Aging Assessment research, including transformer high-voltage winding (3), transformer
Low pressure winding (4), heating wire (7), experimental box (1), temperature control system (9), humidity control system (13), dielectric spectra tester
(8), terminating machine (14), insulating oil (2) liquid level in experimental box (1) be higher than transformer high-voltage winding (3) and transformer low voltage around
Group (4), transformer high-voltage winding (3) and transformer low voltage winding (4) be replaced by the transformer high-voltages of different degree of agings around
Group (3) and transformer low voltage winding (4), in interior bottom surrounding winding heating wire (7) of insulation fuel tank (1), the first temperature sensor
(5a) and second temperature sensor (5b), which are placed in insulation fuel tank (1), monitors insulating oil (2) temperature in real time, and temperature data is passed
It send to temperature control system (9), temperature control system (9) sends temperature data uploading to terminating machine (14), terminating machine (14)
Instruction cut-offs to guarantee to insulate to temperature control system (9) by the power supply of temperature control system (9) control heating wire (7)
Fuel tank (1) is in temperature constant state, and the first moisture transducer (6a) and the second moisture transducer (6b) are placed in real in insulation fuel tank (1)
When monitor insulating oil (2) interior moisture content, moisture data is sent to humidity control system (13), humidity control system (13) will
Humidity data is uploaded to terminating machine (14), obtains insulating paper moisture content by paper oil insulation stable state micro hydropower cloth curve, and eventually
Terminal (14) sends a command to humidity control system (13), passes through humidity control system (13) control humidifier (12) and air pump
(11) moisture is delivered in experimental box (1) through conduit (10), reach control transformer high-voltage winding (3) and transformer low voltage around
The purpose of group (4) interior moisture content, dielectric spectra tester (8) high pressure terminate transformer high-voltage winding (3), and low pressure terminates transformer
Low pressure winding (4), the dielectric spectral curve of test are uploaded to terminating machine (14) storage analysis；
Step 2: preparing the winding of different agings and damp degree
Opening temperature control system (9) controls the temperature in experimental box (1) in fiducial temperature T0, unit is DEG C；It opens
Humidity control system (13) is obtained by the first moisture transducer (6a) in experimental box (1) and the second moisture transducer (6b)
Moisture data is sent to humidity control system (13) by moisture content in insulating oil (2), and humidity control system (13) is by water fraction
According to terminating machine (14) are uploaded to, insulating paper moisture content, terminating machine (14) are obtained by paper oil insulation stable state micro hydropower cloth curve
Humidity control system (13) humidification process different degrees of to the progress in experimental box (1) is sent a command to, different agings are obtained
With the transformer high-voltage winding (3) and transformer low voltage winding (4) of damp degree；
Step 3: establishing the dielectric spectroscopy database of different agings and damp degree
Open dielectric spectra tester (8), applications voltage be 1400V, test frequency point be 0.001Hz, 0.0022Hz,
0.0046Hz、0.01Hz、0.22Hz、0.46Hz、1Hz、2Hz、5Hz、10Hz、20Hz、40Hz、70Hz、110Hz、220Hz、
470Hz and 1000Hz is tested in fiducial temperature T0Lower difference degree of aging, different damp degree transformer winding be situated between again relatively
The dielectric spectroscopy of electric constant real part (ε ') and opposite complex dielectric permittivity imaginary part (ε "), is uploaded to terminating machine for test result
(14), the transformer winding dielectric spectroscopy testing standard database of different degree of agings, different damp degrees is established；
Step 4: dielectric spectroscopy test and reduction
It opens dielectric spectroscopy tester (8), the opposite complex dielectric permittivity for testing the winding of unknown aging damp degree is real
The dielectric spectroscopy in portion (ε ') and opposite complex dielectric permittivity imaginary part (ε "), test environment temperature are T, unit for DEG C, will be in environment
Temperature is the dielectric spectroscopy test result reduction of the winding of the unknown aging damp degree of T to fiducial temperature T0Under, it counts first
It calculates insulating oil relaxation process activation energy and dielectric spectra reduction refers to preceding parameter alpha:
In formula, R is Boltzmann constant, fTFor the test frequency of dielectric spectroscopy under environment temperature T, fT0For reference temperature
T0Under corresponding Frequency point, according to above formula calculate reduction to reference temperature under opposite complex dielectric permittivity (ε ') with relatively again dielectric
Constant imaginary part (ε "):
Step 5: by environment temperature be T unknown aging damp degree winding dielectric spectroscopy test result with
Curve in standard database calculates similarity one by one, and the corresponding database winding state of similarity maximum value is the winding aging
And damp degree, the calculating of similarity are as follows:
In formula, f0kFor reduction to reference temperature T0The kth point test value of dielectric spectroscopy afterwards, fikFor in standard database
I-th dielectric spectroscopy test curve kth point test value.
Claims (1)
1. the experimental method of a kind of winding model humidified insulation and Aging Assessment research, which comprises the following steps:
Step 1: building experiment porch
The experiment porch of winding model humidified insulation and Aging Assessment research, including transformer high-voltage winding (3), transformer low voltage
Winding (4), heating wire (7), experimental box (1), temperature control system (9), humidity control system (13), dielectric spectra tester (8),
Terminating machine (14), insulating oil (2) liquid level in experimental box (1) are higher than transformer high-voltage winding (3) and transformer low voltage winding
(4), transformer high-voltage winding (3) and transformer low voltage winding (4) are replaced by the transformer high-voltage winding of different degree of agings
(3) and transformer low voltage winding (4), in interior bottom surrounding winding heating wire (7) of insulation fuel tank (1), the first temperature sensor
(5a) and second temperature sensor (5b), which are placed in insulation fuel tank (1), monitors insulating oil (2) temperature in real time, and temperature data is passed
It send to temperature control system (9), temperature control system (9) sends temperature data uploading to terminating machine (14), terminating machine (14)
Instruction cut-offs to guarantee to insulate to temperature control system (9) by the power supply of temperature control system (9) control heating wire (7)
Fuel tank (1) is in temperature constant state, and the first moisture transducer (6a) and the second moisture transducer (6b) are placed in real in insulation fuel tank (1)
When monitor insulating oil (2) interior moisture content, moisture data is sent to humidity control system (13), humidity control system (13) will
Humidity data is uploaded to terminating machine (14), obtains insulating paper moisture content by paper oil insulation stable state micro hydropower cloth curve, and eventually
Terminal (14) sends a command to humidity control system (13), passes through humidity control system (13) control humidifier (12) and air pump
(11) moisture is delivered in experimental box (1) through conduit (10), reach control transformer high-voltage winding (3) and transformer low voltage around
The purpose of group (4) interior moisture content, dielectric spectra tester (8) high pressure terminate transformer high-voltage winding (3), and low pressure terminates transformer
Low pressure winding (4), the dielectric spectral curve of test are uploaded to terminating machine (14) storage analysis；
Step 2: preparing the winding of different agings and damp degree
Opening temperature control system (9) controls the temperature in experimental box (1) in fiducial temperature T0, unit is DEG C；Open humidity
Control system (13) is insulated by the first moisture transducer (6a) in experimental box (1) and the second moisture transducer (6b)
Moisture content in oily (2), moisture data is sent to humidity control system (13), humidity control system (13) will be in moisture data
Terminating machine (14) are reached, insulating paper moisture content are obtained by paper oil insulation stable state micro hydropower cloth curve, terminating machine (14) is sent
Instruct to humidity control system (13) to the different degrees of humidification process of progress in experimental box (1), obtain different agings and by
The transformer high-voltage winding (3) and transformer low voltage winding (4) of tidal excursion degree；
Step 3: establishing the dielectric spectroscopy database of different agings and damp degree
Open dielectric spectra tester (8), applications voltage be 1400V, test frequency point be 0.001Hz, 0.0022Hz,
0.0046Hz、0.01Hz、0.22Hz、0.46Hz、1Hz、2Hz、5Hz、10Hz、20Hz、40Hz、70Hz、110Hz、220Hz、
470Hz and 1000Hz is tested in fiducial temperature T0Lower difference degree of aging, different damp degree transformer winding be situated between again relatively
The dielectric spectroscopy of electric constant real part (ε ') and opposite complex dielectric permittivity imaginary part (ε "), is uploaded to terminating machine for test result
(14), the transformer winding dielectric spectroscopy testing standard database of different degree of agings, different damp degrees is established；
Step 4: dielectric spectroscopy test and reduction
It opens dielectric spectroscopy tester (8), tests the opposite complex dielectric permittivity real part of the winding of unknown aging damp degree
The dielectric spectroscopy of (ε ') and opposite complex dielectric permittivity imaginary part (ε "), test environment temperature are T, unit for DEG C, will be in environment temperature
Degree is the dielectric spectroscopy test result reduction of the winding of the unknown aging damp degree of T to fiducial temperature T0Under, it calculates first
Insulating oil relaxation process activation energy and dielectric spectra reduction refer to preceding parameter alpha:
In formula, R is Boltzmann constant, fTFor the test frequency of dielectric spectroscopy under environment temperature T, fT0For reference temperature T0Under
Corresponding Frequency point calculates opposite complex dielectric permittivity (ε ') and opposite complex dielectric permittivity under reduction to reference temperature according to above formula
Imaginary part (ε "):
Step 5: by the dielectric spectroscopy test result and standard of the winding for the unknown aging damp degree that environment temperature is T
Curve in database calculates similarity one by one, the corresponding database winding state of similarity maximum value be the winding aging and by
The calculating of tidal excursion degree, similarity is as follows:
In formula, f0kFor reduction to reference temperature T0The kth point test value of dielectric spectroscopy afterwards, fikIt is in standard database i-th
Dielectric spectroscopy test curve kth point test value.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110045244A (en) * | 2019-04-27 | 2019-07-23 | 西南交通大学 | A kind of transformer winding is unevenly made moist the appraisal procedure of state |
| CN111812467A (en) * | 2020-07-16 | 2020-10-23 | 重庆大学 | Method for evaluating aging state of oil-impregnated transformer oil paper insulation system |
| CN112526304A (en) * | 2020-12-21 | 2021-03-19 | 广东电网有限责任公司电力科学研究院 | Transformer winding section insulation characteristic test model |
| CN112924905A (en) * | 2021-02-02 | 2021-06-08 | 西南交通大学 | Transformer winding insulation evaluation method based on gradient voltage high-frequency oscillation |
| CN113567494A (en) * | 2021-08-26 | 2021-10-29 | 广东电网有限责任公司东莞供电局 | Aging degree testing method and model of electric power composite grease |
| CN114543896A (en) * | 2022-03-23 | 2022-05-27 | 成都高斯电子技术有限公司 | Capacitive equipment medium water content and aging evaluation method based on temperature drift electrical parameters |
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| CN116125147A (en) * | 2022-11-22 | 2023-05-16 | 西南交通大学 | Evaluation method of dry type transformer insulating material in high-temperature and high-humidity environment |
| CN116773987A (en) * | 2023-08-24 | 2023-09-19 | 北京中联太信科技有限公司 | Insulation level monitoring's on-line control system |
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| CN111812467A (en) * | 2020-07-16 | 2020-10-23 | 重庆大学 | Method for evaluating aging state of oil-impregnated transformer oil paper insulation system |
| CN112526304A (en) * | 2020-12-21 | 2021-03-19 | 广东电网有限责任公司电力科学研究院 | Transformer winding section insulation characteristic test model |
| CN112924905A (en) * | 2021-02-02 | 2021-06-08 | 西南交通大学 | Transformer winding insulation evaluation method based on gradient voltage high-frequency oscillation |
| CN113567494B (en) * | 2021-08-26 | 2023-06-27 | 广东电网有限责任公司东莞供电局 | Aging degree testing method and model for electric power compound grease |
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| CN114543896B (en) * | 2022-03-23 | 2024-05-10 | 成都高斯电子技术有限公司 | Capacitive equipment medium water content and aging evaluation method based on temperature drift electrical parameters |
| CN116125147A (en) * | 2022-11-22 | 2023-05-16 | 西南交通大学 | Evaluation method of dry type transformer insulating material in high-temperature and high-humidity environment |
| CN116125147B (en) * | 2022-11-22 | 2024-01-16 | 西南交通大学 | Evaluation method of dry type transformer insulating material in high-temperature and high-humidity environment |
| CN115774173B (en) * | 2023-02-13 | 2023-04-25 | 广东电网有限责任公司佛山供电局 | Device and method for evaluating insulation performance of dry-type transformer |
| CN115774173A (en) * | 2023-02-13 | 2023-03-10 | 广东电网有限责任公司佛山供电局 | Dry-type transformer insulation performance evaluation device and method |
| CN116773987A (en) * | 2023-08-24 | 2023-09-19 | 北京中联太信科技有限公司 | Insulation level monitoring's on-line control system |
| CN116773987B (en) * | 2023-08-24 | 2023-10-31 | 北京中联太信科技有限公司 | Insulation level monitoring's on-line control system |
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