CN107621575B - 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 methods of tractive transformer insulating materials.This method builds the platform of tractive transformer insulating materials dielectric properties experiment first, then reference temperature T1 is set and test environment temperature T, connect and control heating or cooling system, dielectric spectroscopy at a temperature of test T1 within the scope 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 within the scope of 1Hz to 1kHz, it calculates and compensates Frequency point in reference temperature T1 frequency domain spectra, and compensate the frequency domain spectral curve under reference temperature T1, according to the compensation frequency domain spectra and the complete dielectric spectroscopy curve of test frequency domain spectra composition at a temperature of T1.Using the experimental method and platform of tractive transformer insulating materials provided by the invention, the efficiency in tractive transformer production process can be can be improved, examine the dielectric properties of insulating materials in production process.
Description
Technical field
The invention belongs to large-scale tractive transformer insulating material properties detection fields, and in particular to a kind of tractive transformer is exhausted
The dielectric properties experimental method of edge material.
Background technique
Tractive transformer is one of the equipment of most critical in tractive power supply system, it carries power converter, electric energy distribution
With the task of transmission, insulating materials (paper oil insulation) state therefore is led one of an important factor for determining the tractive transformer service life
Can the insulation performance that transformer be drawn is directly related to tractive power supply system reliably and securely run.Tractive transformer produced
Cheng Zhong, tensile strength, dielectric properties, the moisture content etc. of insulating materials are all the critical performance parameters of material, are directly influenced
The performance and quality for the tractive transformer produced, the acquisition of insulating material properties parameter mainly pass through the factory report of material
Accuse, especially the relevant parameter of the dielectric properties of insulating materials in tractive transformer production process on be not possible to carry out effectively
Test.Therefore, in order to which the performance of insulating materials used in tractive transformer production process is effectively detected, production is improved
The performance and quality of tractive transformer out are badly in need of a kind of dielectric properties experimental method of tractive transformer insulating materials.
Summary of the invention
In order to examine the performance of insulating materials in production process, the present invention provides a kind of tractive transformer insulation materials
The method of the dielectric properties experiment of material, this approach includes 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 three electrode test system of paper oil insulation, branch
Frame, insulating oil, temperature sensor, insulation fuel tank, blender, heating sheet, dielectric spectra tester, terminating machine, temperature control system, refrigeration
System, condenser pipe, high-field electrode, oilpaper sample, measurement and guard electrode are constituted, and refrigeration system is connected with condenser pipe, heating sheet,
Blender, 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 of case controls；The high-field electrode of three electrode test system of paper oil insulation is connected with the output end of dielectric spectra tester, measurement
It is connected with guard electrode with the input terminal of dielectric spectra tester, while measures and being grounded with guard electrode, dielectric spectra tester and end
Terminal is connected, and realizes the dielectric spectroscopy test of paper oil insulation；Three electrode test system of paper oil insulation by bracket from insulation fuel tank
Top is fixed, including high-field electrode, oilpaper sample, measurement and guard electrode, fills insulating oil, liquid level position in insulation fuel tank
At 4/5 position of insulation fuel tank, the cloth on the bracket in insulation oil level and three electrode test system middle position of paper oil insulation
Temperature sensor is set, insulation tank bottoms installation heating sheet and blender, blender are tightly attached on heating sheet, 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, unit with environment temperature T
For K；
Third step：Test reference temperature T1The frequency domain spectra of lower designated frequency range
As reference temperature T1When more than or equal to test environment temperature T, terminating machine control opens temperature control system to insulating oil
Heating, turn on agitator, temperature sensor monitor the oil temperature of insulating oil, are back to terminating machine, terminating machine monitors that temperature reaches
T1Afterwards, it opens dielectric spectra tester and tests T1At a temperature of 1Hz to 1kHz opposite 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 obtains paper oil insulation in T1At a temperature of 1Hz to 1kHz frequency range in test result；
As reference temperature T1When less than test environment temperature T, terminating machine controls temperature control system, opens refrigeration system, passes through
Condenser pipe cools down to insulating oil, and 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, T is tested1At a temperature of 1Hz to 1kHz opposite 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 obtains paper oil insulation in T1At a temperature of 1Hz to 1kHz frequency range 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 continues to heat to insulating oil, and temperature sensor monitors oil temperature, is back to terminating machine, eventually
Terminal monitoring insulation oil temperature reaches compensation temperature T2Afterwards, dielectric spectra tester is opened, tests paper oil insulation in T2At a temperature of 1Hz
Opposite complex dielectric permittivity real part ε ' and opposite complex dielectric permittivity imaginary part ε ", test frequency point to 1kHz are followed successively by 1Hz, 2Hz,
5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz；
6th step：Calculate reference temperature T1Frequency point is compensated in frequency domain spectra
Compensation temperature T is calculated using formula (2)2Under each test frequency pointIn reference temperature T1Under corresponding frequency values according to
Secondary f1, f2, f3, f4... ..., f9, f10, f11, whereinRespectively 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 opposite complex dielectric permittivity real part ε ' (T2_
N), using formula (3) to reference temperature T1The opposite 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 opposite complex dielectric permittivity real
Portion ε " (T2_ n), using formula (4) to reference temperature T1The opposite 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 within the scope of lower 1mHz to 1kHz
Resulting temperature T is tested according to third step1The temperature T of the frequency domain spectra of lower 1Hz to 1kHz and the compensation of the 7th step1Under
1mHz forms reference temperature T to 1Hz frequency domain spectra1Dielectric spectroscopy within the scope 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 can be improved
Efficiency in device production process examines the dielectric properties of insulating materials in production process.
Detailed description of the invention
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.
Specific embodiment
The present invention will be further explained below with reference to the attached 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 three electrode test system 1 of paper oil insulation, branch
Frame 2, insulating oil 3, temperature sensor 4, insulation fuel tank 5, blender 6, heating sheet 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 and guard electrode 15 are constituted, refrigeration system
System 11 is connected with condenser pipe 12, heating sheet 7, blender 6, temperature sensor 4, refrigeration system 11 respectively with 10 phase of temperature control system
Even, temperature control system 10 is connected with terminating machine 9, realizes the temperature control of insulation fuel tank 11；Three electrode test system 1 of paper oil insulation
High-field electrode 13 is connected with the output end of dielectric spectra tester 8, the input terminal of measurement and guard electrode 15 and dielectric spectra tester 8
It is connected, while measures and being 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；Three electrode test system 1 of paper oil insulation is fixed by bracket 2 from insulation 5 top of fuel tank, including high-field electrode 13, oil
Pattern product 14, measurement and guard electrode 15, insulation fuel tank 5 is interior to fill insulating oil 3, and liquid level is located at 4/5 of insulation fuel tank 5
Place is set, temperature sensor 4 is arranged on the bracket 2 in insulation oil level and three electrode test system of paper oil insulation, 1 middle position, absolutely
5 bottom of edge fuel tank installation heating sheet 7 and blender 6, blender 6 are tightly attached on heating sheet 7, and insulation 5 bottom of fuel tank is uniformly pacified
Fill condenser pipe 12；
Second step：Set reference temperature T1
Reference temperature T is set1It is 298K for 323K, test environment temperature T；
Third step：Test reference temperature T1The frequency domain spectra of lower designated frequency range
Reference temperature T1Greater than test environment temperature T, the control of terminating machine 9 is opened temperature control system 10 and is heated to insulating oil 3, opens
Blender 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, it opens dielectric spectra tester 8 and tests T1At a temperature of 1Hz to 1kHz opposite 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 obtains paper oil insulation in T1At a temperature of 1Hz to 1kHz frequency range 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 continues to heat to insulating oil 3, and temperature sensor 4 monitors the oil temperature of insulating oil 3, is returned
It is back to terminating machine 9, terminating machine 9 monitors that temperature reaches compensation temperature T2Afterwards, dielectric spectra tester 8 is opened, paper oil insulation is tested
In T2At a temperature of 1Hz to 1kHz opposite complex dielectric permittivity real part ε ' and opposite 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 T1Frequency point is compensated in frequency domain spectra
Compensation temperature T2Each test frequency point of frequency domain spectra 1Hz to 1kHzRespectively 1Hz, 2Hz, 5Hz, 10Hz, 20Hz,
40Hz, 70Hz, 110Hz, 220Hz, 470Hz, 1000Hz calculate compensation temperature T2Each test frequency point of frequency domain spectra 1Hz to 1kHzIn 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 fT2Opposite complex dielectric permittivity real part ε ' and relatively multiple be situated between
The test result of electric constant imaginary part ε ", using formula ε ' (T1The ε ' (T of)=0.7262), ε " (T1The ε " (T of)=0.7262) to reference temperature
T1The frequency domain spectra respective frequencies point f of lower 1mHz to 1HzT1It compensates, obtains T under reference temperature1Compensation result；
8th step：Form reference temperature T1Dielectric spectroscopy within the scope of lower 1mHz to 1kHz
The frequency domain spectra of resulting 1Hz to 1kHz and 1mHz to the 1Hz frequency domain spectra group of the 6th step compensation are tested according to second step
At reference temperature T1Dielectric spectroscopy within the scope of lower 1mHz to 1kHz, Fig. 3 show the experiment of tractive transformer insulating materials
Dielectric spectroscopy curve under test method.
Claims (1)
1. a kind of dielectric properties experimental method of tractive transformer insulating materials, it is characterised in that include 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 three electrode test system (1) of paper oil insulation, bracket
(2), insulating oil (3), temperature sensor (4), insulation fuel tank (5), blender (6), heating sheet (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
It is constituted with guard electrode (15), refrigeration system (11) is connected with condenser pipe (12), heating sheet (7), blender (6), temperature sensing
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 of fuel tank (11) controls；The high-field electrode (13) of three electrode test system (1) of paper oil insulation and dielectric spectra tester (8)
Output end is connected, and measurement is connected with guard electrode (15) with the input terminal 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 bracket (2) from insulation fuel tank (5) top, including high-field electrode (13), oilpaper sample
(14), measurement and guard electrode (15), insulation fuel tank (5) is interior to fill insulating oil (3), and liquid level is located at insulation fuel tank (5)
At 4/5 position, temperature is arranged on the bracket (2) in insulation oil level and paper oil insulation three electrode test system (1) middle position
Sensor (4), insulation fuel tank (5) bottom installation heating sheet (7) and blender (6), blender (6) be tightly attached to heating sheet (7) it
On, condenser pipe (12) are uniformly installed in insulation fuel tank (5) bottom；
Second step：Set reference temperature T1
Reference temperature T is set1, test environment temperature T, reference temperature T1It is thermodynamic temperature, unit K with environment temperature T；
Third step：Test reference temperature T1The frequency domain spectra of lower designated frequency range
As reference temperature T1When 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), temperature sensor (4) monitor the oil temperature of insulating oil (3), are back to terminating machine (9), terminal
Machine (9) monitors that temperature reaches T1Afterwards, dielectric spectra tester (8) are opened and tests T1At a temperature of 1Hz to 1kHz relatively answer dielectric it is normal
Number real part ε ' and opposite complex dielectric permittivity imaginary part ε ", test frequency point are followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz,
60Hz, 90Hz, 220Hz, 470Hz, 1000Hz obtain paper oil insulation in T1At a temperature of 1Hz to 1kHz frequency range in survey
Test result；
As reference temperature T1When less than test environment temperature T, terminating machine (9) controls temperature control system (10), opens refrigeration system
(11), cooled down by condenser pipe (12) to insulating oil (3), temperature sensor (4) monitors oil temperature, is back to terminating machine (9), terminal
Machine (9) monitoring insulating oil (3) temperature reaches T1Afterwards, dielectric spectra tester (8) are opened, tests T1At a temperature of 1Hz to 1kHz it is opposite
Complex dielectric permittivity real part ε ' and opposite complex dielectric permittivity imaginary part ε ", test frequency point are followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz,
42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz obtain paper oil insulation in T1At a temperature of 1Hz to 1kHz frequency range 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, using formula (1)
Calculate compensation temperature T2, unit K；
5th step：Test T2At a temperature of designated frequency range frequency domain spectra
Temperature control system (10) is opened, and continues to heat to insulating oil (3), and temperature sensor (4) monitors oil temperature, is back to terminal
Machine (9), terminating machine (9) monitoring insulating oil (3) temperature reach compensation temperature T2Afterwards, dielectric spectra tester (8) are opened, tests oilpaper
Insulation is in T2At a temperature of 1Hz to 1kHz opposite complex dielectric permittivity real part ε ' and opposite complex dielectric permittivity imaginary part ε ", test frequency
Point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz；
6th step：Calculate reference temperature T1Frequency point is compensated in frequency domain spectra
Compensation temperature T is calculated using formula (2)2Under each test frequency pointIn reference temperature T1Under corresponding frequency values successively f1,
f2, f3, f4... ..., f9, f10, f11, whereinRespectively 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 opposite complex dielectric permittivity real part ε ' (T2_ n), it adopts
With formula (3) to reference temperature T1The opposite 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 opposite complex dielectric permittivity imaginary part ε "
(T2_ n), using formula (4) to reference temperature T1The opposite complex dielectric permittivity imaginary part of lower low frequency compensates, and obtains reference temperature T1
Low-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 within the scope of lower 1mHz to 1kHz
Resulting temperature T is tested according to third step1The temperature T of the frequency domain spectra of lower 1Hz to 1kHz and the compensation of the 7th step1Lower 1mHz is extremely
1Hz frequency domain spectra forms reference temperature T1Dielectric spectroscopy within the scope of lower 1mHz to 1kHz.
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| CN109116154B (en) * | 2018-08-24 | 2019-07-12 | 西南交通大学 | A kind of experimental method of winding model humidified insulation and Aging Assessment research |
| 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 |
| CN109507545A (en) * | 2018-10-23 | 2019-03-22 | 广西电网有限责任公司电力科学研究院 | A kind of test method of the influence of temperature to dielectric spectroscopy |
| 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 |
| CN113325044B (en) * | 2021-03-12 | 2022-01-28 | 南通大学 | 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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| JP3514479B2 (en) * | 1992-11-30 | 2004-03-31 | 株式会社日平トヤマ | Gap amount detection device for laser processing machine |
| US6703847B2 (en) * | 1995-03-15 | 2004-03-09 | Liebrecht Venter | Determining the dielectric properties of wood |
| DE19637888A1 (en) * | 1996-09-17 | 1998-03-19 | Siemens Ag | Determining di-electricity and loss factor of individual insulating layers in multi-layer circuit boards |
| CN101713721A (en) * | 2009-12-22 | 2010-05-26 | 西安交通大学 | Experimental device and experimental method for transformer oilpaper insulating thermal ageing |
| 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 |
| CN203069677U (en) * | 2013-03-04 | 2013-07-17 | 滁州学院 | Digital inductance measuring meter |
| CN104155528A (en) * | 2014-08-19 | 2014-11-19 | 国家电网公司 | Method for testing transformer oil paper insulation frequency domain dielectric response and device thereof |
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