CN107621575A - A kind of dielectric properties experimental method of tractive transformer insulating materials - Google Patents
A kind of dielectric properties experimental method of tractive transformer insulating materials Download PDFInfo
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Abstract
The invention discloses a kind of dielectric properties experimental method of tractive transformer insulating materials.This method builds the platform of tractive transformer insulating materials dielectric properties experiment first, then reference temperature T1 and test environment temperature T are set, connect and control heating or cooling system, dielectric spectroscopy at a temperature of test T1 in the range of 1Hz to 1kHz, then compensation temperature T2 is calculated, system temperature is adjusted to T2 temperature, dielectric spectroscopy at a temperature of test T2 in the range of 1Hz to 1kHz, calculate compensation Frequency point in reference temperature T1 frequency domain spectras, and compensate the frequency domain spectral curve under reference temperature T1, complete dielectric spectroscopy curve is formed according to the compensation frequency domain spectra at a temperature of T1 and test frequency domain spectra.Using the experimental method and platform of tractive transformer insulating materials provided by the invention, the efficiency in tractive transformer production process can be improved, examines the dielectric properties of insulating materials in production process.
Description
Technical field
The invention belongs to large-scale tractive transformer insulating material properties detection field, and in particular to a kind of tractive transformer is exhausted
The dielectric properties experimental method of edge material.
Background technology
Tractive transformer is one of equipment of most critical in tractive power supply system, and it carries power converter, electric energy distribution
With the task of transmission, insulating materials (paper oil insulation) state is one of an important factor for determining the tractive transformer life-span, therefore is led
Can the insulating properties that transformer be drawn be directly connected to tractive power supply system and reliably and securely run.Tractive transformer produced
Cheng Zhong, the tensile strength of insulating materials, dielectric properties, moisture etc. is the critical performance parameters of material, is directly influenced
The performance and quality for the tractive transformer produced, the acquisition of insulating material properties parameter mainly pass through the report that dispatches from the factory of material
Accuse, especially the relevant parameter of the dielectric properties of insulating materials in tractive transformer production process on there is no method carry out effectively
Test.Therefore, in order to effectively detect the performance of the insulating materials used in tractive transformer production process, production is improved
The performance and quality of tractive transformer out, it is badly in need of a kind of dielectric properties experimental method of tractive transformer insulating materials.
The content of the invention
In order to examine the performance of insulating materials in production process, the invention provides a kind of tractive transformer insulation material
The method of the dielectric properties experiment of material, this method comprise the following steps：
The first step：Build the platform of tractive transformer insulating materials dielectric properties experiment
The platform of Insulation of Large Transformer dielectric material performance test is mainly by the electrode test system of paper oil insulation three, branch
Frame, insulating oil, temperature sensor, insulation fuel tank, agitator, heating plate, dielectric spectra tester, terminating machine, temperature control system, refrigeration
System, condenser pipe, high-field electrode, oilpaper sample, measurement and guard electrode are formed, and refrigeration system is connected with condenser pipe, heating plate,
Agitator, temperature sensor, refrigeration system are connected with temperature control system respectively, and temperature control system is connected with terminating machine, realize insulating oil
The temperature control of case；The high-field electrode of the electrode test system of paper oil insulation three is connected with the output end of dielectric spectra tester, measurement
It is connected with guard electrode with the input of dielectric spectra tester, while measures and be grounded with guard electrode, dielectric spectra tester and end
Terminal is connected, and realizes the dielectric spectroscopy test of paper oil insulation；The electrode test system of paper oil insulation three by support from insulation fuel tank
Top is fixed, including high-field electrode, oilpaper sample, measurement and guard electrode, filling insulating oil, liquid level position in insulation fuel tank
In 4/5 opening position of insulation fuel tank, the cloth on support of the insulation oil level with the electrode test system centre position of paper oil insulation three
Temperature sensor is put, insulation tank bottoms installation heating plate and agitator, agitator are close on heating plate, and insulate oil tank bottom
Portion is uniformly installed by condenser pipe；
Second step：Set reference temperature T1
Reference temperature T is set1, test environment temperature T, reference temperature T1It is thermodynamic temperature with environment temperature T, unit
For K；
3rd step：Test reference temperature T1The frequency domain spectra of lower designated frequency range
As reference temperature T1During more than or equal to test environment temperature T, terminating machine control opens temperature control system to insulating oil
Heating, turn on agitator, the oil temperature of temperature sensor monitors insulating oil are back to terminating machine, and terminating machine monitors that temperature reaches
T1Afterwards, dielectric spectra tester test T is opened1At a temperature of 1Hz to 1kHz relative complex dielectric permittivity real part ε ' with relatively answer dielectric it is normal
Number imaginary part ε ", test frequency point are followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz,
1000Hz, paper oil insulation is obtained in T1At a temperature of 1Hz to 1kHz frequency ranges in test result；
As reference temperature T1During less than test environment temperature T, terminating machine control temperature control system, refrigeration system is opened, is passed through
Condenser pipe cools to insulating oil, temperature sensor monitors oil temperature, is back to terminating machine, and terminating machine monitoring insulation oil temperature reaches T1
Afterwards, dielectric spectra tester is opened, tests T1At a temperature of 1Hz to 1kHz relative complex dielectric permittivity real part ε ' with relatively answer dielectric it is normal
Number imaginary part ε ", test frequency point are followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz,
1000Hz, paper oil insulation is obtained in T1At a temperature of 1Hz to 1kHz frequency ranges in test result；
4th step：Calculate compensation temperature T2
According to the reference temperature T of setting1, test process initial frequency 1Hz and compensation process initial frequency 1mHz, use
Formula (1) calculates compensation temperature T2, unit K；
5th step：Test T2At a temperature of designated frequency range frequency domain spectra
Temperature control system is opened, and insulating oil is continued to heat, temperature sensor monitors oil temperature, is back to terminating machine, eventually
Terminal monitoring insulation oil temperature reaches compensation temperature T2, after, dielectric spectra tester is opened, test paper oil insulation is in T2At a temperature of 1Hz
Relative complex dielectric permittivity real part ε ' to 1kHz is followed successively by 1Hz, 2Hz with relative complex dielectric permittivity imaginary part ε ", test frequency point,
5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz；
6th step：Calculate reference temperature T1Compensation Frequency point in frequency domain spectra
Compensation temperature T is calculated using formula (2)2Under each test frequency point fT2_nIn reference temperature T1Frequency values corresponding to lower according to
Secondary f1, f2, f3, f4... ..., f9, f10, f11, wherein fT2_nRespectively 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz,
90Hz, 220Hz, 470Hz, 1000Hz, n=1 in formula (2), 2,3,4 ... ..., 11；
7th step：Compensate reference temperature T1Under frequency domain spectral curve
According to compensation temperature T21Hz to 1000Hz in each Frequency point test to obtain relative complex dielectric permittivity real part ε ' (T2_
N), using formula (3) to reference temperature T1The relative complex dielectric permittivity real part of lower low frequency compensates, and obtains reference temperature T1Low frequency
Compensation result ε ' (T1_ n), according to compensation temperature T21Hz to 1000Hz in each Frequency point to test to obtain relative complex dielectric permittivity real
Portion ε " (T2_ n), using formula (4) to reference temperature T1The relative complex dielectric permittivity real part of lower low frequency compensates, and obtains with reference to temperature
Spend T1Low-frequency compensation result ε " (T1_ n), wherein compensation temperature T21Hz to 1000Hz in each test frequency point be respectively：1Hz,
2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz, formula (3) and n=1 in formula (4), 2,3,
4 ... ..., 11；
8th step：Form reference temperature T1Dielectric spectroscopy in the range of lower 1mHz to 1kHz
According to the temperature T of the 3rd pacing examination gained1Lower 1Hz to 1kHz frequency domain spectra and the temperature T of the 7th step compensation1Under
1mHz forms reference temperature T to 1Hz frequency domain spectras1Dielectric spectroscopy in the range of lower 1mHz to 1kHz.
Using the experimental method and platform of tractive transformer insulating materials provided by the invention, traction voltage transformation can be improved
Efficiency in device production process, examine the dielectric properties of insulating materials in production process.
Brief description of the drawings
A kind of dielectric properties experimental method flow chart of tractive transformer insulating materials of Fig. 1.
A kind of dielectric properties experiment porch schematic diagram of tractive transformer insulating materials of Fig. 2.
A kind of dielectric properties experimental method experimental result example of tractive transformer insulating materials of Fig. 3.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 show a kind of dielectric properties experimental method flow chart of tractive transformer insulating materials, and Fig. 2 show one kind
The dielectric properties experiment porch schematic diagram of tractive transformer insulating materials, as seen from Figure 1, Figure 2 a kind of tractive transformer insulation material
The dielectric properties experimental method of material comprises the steps of：
The first step：Build the platform of tractive transformer insulating materials dielectric properties experiment
The platform of Insulation of Large Transformer dielectric material performance test is mainly by the electrode test system 1 of paper oil insulation three, branch
Frame 2, insulating oil 3, temperature sensor 4, insulation fuel tank 5, agitator 6, heating plate 7, dielectric spectra tester 8, terminating machine 9, temperature control
System 10, refrigeration system 11, condenser pipe 12, high-field electrode 13, oilpaper sample 14, measurement are formed with guard electrode 15, refrigeration system
System 11 is connected with condenser pipe 12, heating plate 7, agitator 6, temperature sensor 4, refrigeration system 11 respectively with the phase of temperature control system 10
Even, temperature control system 10 is connected with terminating machine 9, realizes the temperature control of insulation fuel tank 11；The electrode test system 1 of paper oil insulation three
High-field electrode 13 is connected with the output end of dielectric spectra tester 8, measurement and guard electrode 15 and the input of dielectric spectra tester 8
It is connected, while measurement is grounded with guard electrode 15, dielectric spectra tester 8 is connected with terminating machine 9, realizes that the frequency domain of paper oil insulation is situated between
Electricity spectrum test；The electrode test system 1 of paper oil insulation three is fixed by support 2 from insulation fuel tank 5 top, including high-field electrode 13, oil
Pattern product 14, measure with guard electrode 15, filling insulating oil 3 in the fuel tank 5 that insulate, liquid level is located at 4/5 of insulation fuel tank 5
Place is put, arranges temperature sensor 4 on support 2 of the insulation oil level with the centre position of three electrode test system of paper oil insulation 1, absolutely
Heating plate 7 is installed in the bottom of edge fuel tank 5 and agitator 6, agitator 6 are close on heating plate 7, insulation fuel tank 5 bottom even peace
Fill condenser pipe 12；
Second step：Set reference temperature T1
Reference temperature T is set1For 323K, test environment temperature T is 298K；
3rd step：Test reference temperature T1The frequency domain spectra of lower designated frequency range
Reference temperature T1More than test environment temperature T, the control of terminating machine 9 opens temperature control system 10 and insulating oil 3 is heated, and opens
Agitator 6 is opened, temperature sensor 4 monitors the oil temperature of insulating oil 3, is back to terminating machine 9, terminating machine 9 monitors that temperature reaches T1
Afterwards, open dielectric spectra tester 8 and test T1At a temperature of 1Hz to 1kHz relative complex dielectric permittivity real part ε ' with relatively answer dielectric it is normal
Number imaginary part ε ", test frequency point are followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz,
1000Hz, paper oil insulation is obtained in T1At a temperature of 1Hz to 1kHz frequency ranges in dielectric spectra；
4th step：Calculate compensation temperature T2
According to the reference temperature 323K of setting, compensation temperature T is calculated using formula (1)2For 402K；
5th step：Test T2At a temperature of designated frequency range frequency domain spectra
Temperature control system 10 is opened, and insulating oil 3 is continued to heat, and temperature sensor 4 monitors the oil temperature of insulating oil 3, returns
Terminating machine 9 is back to, terminating machine 9 monitors that temperature reaches compensation temperature T2, after, dielectric spectra tester 8 is opened, tests paper oil insulation
In T2At a temperature of 1Hz to 1kHz relative complex dielectric permittivity real part ε ' and relative complex dielectric permittivity imaginary part ε ", test frequency point according to
Secondary is 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz；
6th step：Calculate reference temperature T1Compensation Frequency point in frequency domain spectra
Compensation temperature T2Each test frequency point f of frequency domain spectra 1Hz to 1kHzT2Respectively 1Hz, 2Hz, 5Hz, 10Hz, 20Hz,
40Hz, 70Hz, 110Hz, 220Hz, 470Hz, 1000Hz, calculate compensation temperature T2Each test frequency points of frequency domain spectra 1Hz to 1kHz
fT2In reference temperature T1Corresponding frequency values f in frequency spectrumT1Respectively 0.981mHz, 1.963mHz, 4.907mHz,
9.815mHz、19.629mHz、39.259mHz、68.703mHz、0.108Hz、0.216Hz、0.461Hz、0.981Hz；
7th step：Compensate reference temperature T1Under frequency domain spectral curve
According to compensation temperature T21Hz to 1kHz in each Frequency point fT2Relative complex dielectric permittivity real part ε ' and relatively multiple be situated between
Electric constant imaginary part ε " test result, using formula ε ' (T1The ε ' (T of)=0.7262), ε " (T1The ε " (T of)=0.7262) to reference temperature
T1Lower 1mHz to 1Hz frequency domain spectra respective frequencies point fT1Compensate, obtain T under reference temperature1Compensation result；
8th step：Form reference temperature T1Dielectric spectroscopy in the range of lower 1mHz to 1kHz
According to the 1mHz that the 1Hz to 1kHz of second step test gained frequency domain spectra and the 6th step compensate to 1Hz frequency domain spectra groups
Into reference temperature T1Dielectric spectroscopy in the range of lower 1mHz to 1kHz, Fig. 3 show the experiment of tractive transformer insulating materials
Dielectric spectroscopy curve under method of testing.
Claims (1)
1. a kind of dielectric properties experimental method of tractive transformer insulating materials, it is characterised in that comprise the following steps：
The first step：Build the platform of tractive transformer insulating materials dielectric properties experiment
The platform of Insulation of Large Transformer dielectric material performance test is mainly by the electrode test system (1) of paper oil insulation three, support
(2), insulating oil (3), temperature sensor (4), insulation fuel tank (5), agitator (6), heating plate (7), dielectric spectra tester (8),
Terminating machine (9), temperature control system (10), refrigeration system (11), condenser pipe (12), high-field electrode (13), oilpaper sample (14), measurement
Formed with guard electrode (15), refrigeration system (11) is connected with condenser pipe (12), heating plate (7), agitator (6), TEMP
Device (4), refrigeration system (11) are connected with temperature control system (10) respectively, and temperature control system (10) is connected with terminating machine (9), realize insulation
The temperature control of fuel tank (11)；The high-field electrode (13) of the electrode test system (1) of paper oil insulation three and dielectric spectra tester (8)
Output end is connected, and measurement is connected with guard electrode (15) with the input of dielectric spectra tester (8), while measurement and guard electrode
(15) it is grounded, dielectric spectra tester (8) is connected with terminating machine (9), realizes the dielectric spectroscopy test of paper oil insulation；Paper oil insulation
Three electrode test systems (1) are fixed by support (2) from insulation fuel tank (5) top, including high-field electrode (13), oilpaper sample
(14), measurement and guard electrode (15), the interior filling insulating oil (3) of insulation fuel tank (5), liquid level is positioned at insulation fuel tank (5)
4/5 opening position, temperature is arranged on support (2) of the insulation oil level with paper oil insulation three electrode test system (1) centre position
Sensor (4), insulation fuel tank (5) bottom installation heating plate (7) and agitator (6), agitator (6) be close to heating plate (7) it
On, insulation fuel tank (5) bottom even installation condenser pipe (12)；
Second step：Set reference temperature T1
Reference temperature T is set1, test environment temperature T, reference temperature T1It is thermodynamic temperature with environment temperature T, unit K；
3rd step：Test reference temperature T1The frequency domain spectra of lower designated frequency range
As reference temperature T1During more than or equal to test environment temperature T, terminating machine (9) control opens temperature control system (10) to insulation
Oily (3) heating, turn on agitator (6), the oil temperature of temperature sensor (4) monitoring insulating oil (3), is back to terminating machine (9), terminal
Machine (9) monitors that temperature reaches T1Afterwards, dielectric spectra tester (8) test T is opened1At a temperature of 1Hz to 1kHz relatively answer dielectric it is normal
Number real part ε ' is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz with relative complex dielectric permittivity imaginary part ε ", test frequency point,
60Hz, 90Hz, 220Hz, 470Hz, 1000Hz, paper oil insulation is obtained in T1At a temperature of 1Hz to 1kHz frequency ranges in survey
Test result；
As reference temperature T1During less than test environment temperature T, terminating machine (9) control temperature control system (10), refrigeration system is opened
(11), insulating oil (3) is cooled by condenser pipe (12), temperature sensor (4) monitoring oil temperature, is back to terminating machine (9), terminal
Machine (9) monitoring insulating oil (3) temperature reaches T1Afterwards, dielectric spectra tester (8) is opened, tests T1At a temperature of 1Hz to 1kHz it is relative
Complex dielectric permittivity real part ε ' is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz with relative complex dielectric permittivity imaginary part ε ", test frequency point,
42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz, paper oil insulation is obtained in T1At a temperature of 1Hz in 1kHz frequency ranges
Test result；
4th step：Calculate compensation temperature T2
According to the reference temperature T of setting1, test process initial frequency 1Hz and compensation process initial frequency 1mHz, using formula (1)
Calculate compensation temperature T2, unit K；
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6th step：Calculate reference temperature T1Compensation Frequency point in frequency domain spectra
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According to compensation temperature T21Hz to 1000Hz in each Frequency point test to obtain relative complex dielectric permittivity real part ε ' (T2_ n), adopt
With formula (3) to reference temperature T1The relative complex dielectric permittivity real part of lower low frequency compensates, and obtains reference temperature T1Low-frequency compensation knot
Fruit ε ' (T1_ n), according to compensation temperature T21Hz to 1000Hz in each Frequency point test to obtain relative complex dielectric permittivity imaginary part ε "
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8th step：Form reference temperature T1Dielectric spectroscopy in the range of lower 1mHz to 1kHz
According to the temperature T of the 3rd pacing examination gained1Lower 1Hz to 1kHz frequency domain spectra and the temperature T of the 7th step compensation1Lower 1mHz is extremely
1Hz frequency domain spectras, composition reference temperature T1Dielectric spectroscopy in the range of lower 1mHz to 1kHz.
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| CN109387704A (en) * | 2018-09-18 | 2019-02-26 | 海南电网有限责任公司电力科学研究院 | A kind of device and measurement method measuring dielectric substance dielectric modulus |
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| CN112730538A (en) * | 2020-12-22 | 2021-04-30 | 国网内蒙古东部电力有限公司呼伦贝尔供电公司 | Insulating oil dielectric property testing device and method with adjustable temperature and humidity |
| CN113325044A (en) * | 2021-03-12 | 2021-08-31 | 南通大学 | Dielectric temperature spectrum testing method |
| CN113358938A (en) * | 2021-05-14 | 2021-09-07 | 南通大学 | Rapid dielectric temperature spectrum testing method |
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| CN113325044A (en) * | 2021-03-12 | 2021-08-31 | 南通大学 | Dielectric temperature spectrum testing method |
| 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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