CN107561371B - A kind of accelerated test method of oil-immersed sleeve pipe frequency domain dielectric response experiment - Google Patents
A kind of accelerated test method of oil-immersed sleeve pipe frequency domain dielectric response experiment Download PDFInfo
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Abstract
The invention discloses a kind of accelerated test methods of oil-immersed sleeve pipe frequency domain dielectric response experiment, the high frequency frequency domain spectra under experimental provision acquisition test temperature and compensation temperature is used according to each step of this method, the low frequency frequency domain spectra under compensation temperature is calculated according to test temperature high frequency frequency domain spectra, to obtain complete dielectric spectroscopy curve.The present invention can shorten the testing time of oil-immersed sleeve pipe dielectric spectroscopy in laboratory, improve the testing efficiency of experiment and the validity of test result.
Description
Technical field
The invention belongs to cover pipe insulation assessment and diagnostic field, and in particular to a kind of oil-immersed sleeve pipe frequency domain dielectric response is real
The accelerated test method tested.
Background technique
Oil-immersed sleeve pipe is the important component of large-scale power transformer, for electrical equipment high-voltage connection to external electrical net
Network connection, the insulation with metal shell, are the important component of electric system, the peace of insulation performance direct relation power grid
Entirely, stable and economical operation.And dielectric spectroscopy method due to its test non-destructive, carry insulation abundant information, strong interference immunity,
Therefore gradually it is applied to the assessment and diagnosis of oil-immersed sleeve pipe paper oil insulation degree of aging and state of making moist.
(frequency range is 1mHz to 1kHz), required when the dielectric spectroscopy test of oil-immersed sleeve pipe interior insulation in laboratory
Time is longer (be greater than 30 minutes), and ((testing time of 1Hz to 1kHz) is respectively low-frequency range for 1mHz to 1Hz) and high-frequency range
34.17 minutes and 1.27 minutes, 27 times of low-frequency range testing time nearly high-frequency range, this greatly affected experiment test
Efficiency, and the dielectric spectroscopy of part oil-immersed sleeve pipe interior insulation tests (the oil immersed type set under such as moisture transient state distribution situation
The test of pipe interior insulation insulation dielectric spectroscopy) need quickly test that reliable effective experimental result just can be obtained, therefore it is anxious
Need a kind of accelerated test method of oil-immersed sleeve pipe frequency domain dielectric response experiment.
Summary of the invention
In order to effectively shorten the oil-immersed sleeve pipe frequency domain dielectric response testing time in laboratory, the present invention proposes one
The accelerated test method of kind oil-immersed sleeve pipe frequency domain dielectric response experiment, comprising the following steps:
Step 1: building oil-immersed sleeve pipe dielectric spectroscopy accelerated test platform
Oil-immersed sleeve pipe dielectric spectroscopy accelerated test platform is built, capacitor core both ends are fixed on insulation fuel tank by bracket
Bottom, insulation fuel tank is interior to fill insulating oil, and liquid level is higher than capacitor core bottom 1cm, insulation inner wall of oil tank arrangement temperature biography
Sensor, insulation tank bottoms installation heating sheet and blender, heating sheet and blender are and with AC power source and relay system
Temperature control system be connected；The oil temperature data of temperature sensor test is back to temperature control system and retransmits to terminating machine, and receives end
The instruction that terminal communication interface is sent, dielectric spectra tester HV Terminal and calibrating terminal are respectively connected to center copper pipe and outermost layer
Capacitance plate；
Step 2: setting compensation temperature T1, test environment temperature T
Compensation temperature T is set1, test environment temperature T, compensation temperature T1It is thermodynamic temperature, unit with environment temperature T
For K, if T is less than T1Third step is then executed, if T is greater than or equal to T1Then execute the 4th step；
Step 3: connecting and controlling temperature elevation system, T is tested1At a temperature of 1Hz to 1kHz test result
Terminating machine control is opened the temperature control system with AC power source and relay system and is heated to insulating oil, and stirring is opened
Device, temperature sensor monitor oil temperature, are back to terminating machine, terminating machine monitors that temperature reaches T1Afterwards, dielectric spectra tester is opened
Test T1At a temperature of 1Hz to 1kHz opposite complex dielectric permittivity real part ε ' and opposite complex dielectric permittivity imaginary part ε ", wherein test frequency
Rate point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz, obtains T1Temperature
Under test frequency domain spectra, test after the completion of execute the 5th step；
Step 4: connecting and controlling cooling system, T is tested1At a temperature of 1Hz to 1kHz test result
Terminating machine control has the temperature control system of AC power source and relay system, compressor is opened, by condenser pipe to exhausted
The cooling of edge oil, temperature sensor monitor oil temperature, are back to terminating machine, and terminating machine monitoring insulation oil temperature reaches T1Afterwards, it opens and is situated between
Electricity spectrum tester, tests T1At a temperature of 1Hz to 1kHz opposite complex dielectric permittivity real part ε ' and opposite complex dielectric permittivity real part ε ",
Wherein test frequency point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz,
The 5th step is executed after the completion of test；
Step 5: calculating test temperature T2
According to the compensation temperature T of setting1, test process initial frequency 1Hz and compensation process initial frequency 1mHz, use
The temperature T of formula (1) calculating test process2, unit K；
Step 6: test T2At a temperature of result within the scope of 1Hz to 1kHz
Temperature control system is opened, and continues to heat to insulating oil, oil temperature reaches test temperature T2, after, it opens dielectric spectra and surveys
Instrument is tried, T is tested2At a temperature of 1Hz to 1kHz opposite complex dielectric permittivity real part and opposite complex dielectric permittivity real part, wherein test frequency
Rate point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz；
Step 7: calculating compensation temperature T1Frequency point is compensated in frequency domain spectra
Test temperature T is calculated using formula (2)2Under each test frequency point fT2_nIn compensation temperature T1Under corresponding frequency values 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；
Step 8: compensation T1Under frequency domain spectral curve
According to test temperature T21Hz to 1000Hz in each Frequency point test to obtain opposite complex dielectric permittivity real part ε ' (T2_
N), using formula (3) to compensation temperature T1The opposite complex dielectric permittivity real part of lower low frequency compensates, and obtains compensation temperature T1Under it is low
Frequency real part compensation result ε ' (T1_ n), according to test temperature T21Hz to 1000Hz in each Frequency point test to obtain relatively answer dielectric
Constant imaginary part ε " (T2_ n), using formula (4) to compensation temperature T1The opposite complex dielectric permittivity real part of lower low frequency compensates, and obtains
Compensation temperature T1Low frequency imaginary part compensation result ε " (T1_ n), wherein test temperature T11Hz to 1000Hz in each test frequency point minute
Not are as follows: 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz, formula (3) and n in formula (4)
=1,2,3,4 ... ..., 11；
Step 9: T1At a temperature of compensation frequency domain spectra and test frequency domain spectra collectively constitute complete dielectric spectroscopy
According to the resulting temperature T of test1The temperature T of the test result of lower 1Hz to 1kHz and the compensation of the 8th step1Lower 1mHz is extremely
1Hz frequency domain spectra compensation result forms compensation temperature T1Dielectric spectroscopy within the scope of lower 1mHz to 1kHz.
The present invention can shorten the testing time of oil-immersed sleeve pipe dielectric spectroscopy in laboratory, improve the test effect of experiment
The validity of rate and test result.
Detailed description of the invention
A kind of accelerated test method flow chart of oil-immersed sleeve pipe frequency domain dielectric response experiment of Fig. 1
Fig. 2 oil-immersed sleeve pipe dielectric spectroscopy accelerated test platform schematic diagram
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
Fig. 1 is a kind of accelerated test method flow chart of oil-immersed sleeve pipe frequency domain dielectric response experiment, and Fig. 2 is oil immersed type set
Pipe dielectric spectroscopy accelerated test platform schematic diagram.
Method provided by the invention includes the following steps: as can be seen from Figure 1
Step 1: building oil-immersed sleeve pipe dielectric spectroscopy accelerated test platform
Oil-immersed sleeve pipe dielectric spectroscopy accelerated test platform is built, 1 both ends of capacitor core are fixed on insulating oil by bracket 2
13 bottom of case, insulation fuel tank 13 is interior to fill insulating oil 5, and liquid level is higher than 1 bottom 1cm of capacitor core, and insulate 13 inner wall of fuel tank
Arrange temperature sensor 4, insulation 13 bottom of fuel tank installation heating sheet 7 and blender 6, heating sheet 7 and blender 6 are and with friendship
Galvanic electricity source is connected with the temperature control system 10 of relay system；The oil temperature data that temperature sensor 4 is tested is back to temperature control system 10 again
It is sent to terminating machine 9, and the instruction that machine 9 communication interface in receiving terminal is sent, 8 HV Terminal of dielectric spectra tester and calibrating terminal
It is respectively connected to center copper pipe 3 and outermost layer capacitance plate；
Step 2: setting compensation temperature T1, test environment temperature T
Compensation temperature T is set1, test environment temperature T, compensation temperature T1It is thermodynamic temperature, unit with environment temperature T
For K, if T is less than T1Third step is then executed, if T is greater than or equal to T1Then execute the 4th step；
Step 3: connecting and controlling temperature elevation system, T is tested1At a temperature of 1Hz to 1kHz test result
The control of terminating machine 9 is opened the temperature control system 10 with AC power source and relay system and is heated to insulating oil 5, and unlatching is stirred
Device 6 is mixed, temperature sensor 4 monitors oil temperature, is back to terminating machine 9, terminating machine 9 monitors that temperature reaches T1Afterwards, dielectric spectra is opened
Tester 8 tests T1At a temperature of 1Hz to 1kHz opposite complex dielectric permittivity real part ε ' and opposite complex dielectric permittivity imaginary part ε ", wherein
Test frequency point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz, obtains
T1At a temperature of test frequency domain spectra, test after the completion of execute the 5th step；
Step 4: connecting and controlling cooling system, T is tested1At a temperature of 1Hz to 1kHz test result
The control of terminating machine 9 has the temperature control system 10 of AC power source and relay system, opens compressor 11, passes through condenser pipe
12 pairs of insulating oils 5 cool down, and temperature sensor 4 monitors oil temperature, are back to terminating machine 9, and the monitoring insulation oil temperature of terminating machine 9 reaches T1
Afterwards, dielectric spectra tester 8 is opened, T is tested1At a temperature of 1Hz to 1kHz opposite complex dielectric permittivity real part ε ' with relatively answer dielectric
Constant real part ε ", wherein test frequency point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz,
470Hz, 1000Hz execute the 5th step after the completion of test；
Step 5: calculating test temperature T2
According to the compensation temperature T of setting1, test process initial frequency 1Hz and compensation process initial frequency 1mHz, use
The temperature T of formula (1) calculating test process2, unit K；
Step 6: test T2At a temperature of result within the scope of 1Hz to 1kHz
Temperature control system 10 is opened, and continues to heat to insulating oil 5, oil temperature reaches test temperature T2, after, open dielectric spectra
Tester 8 tests T2At a temperature of 1Hz to 1kHz opposite complex dielectric permittivity real part and opposite complex dielectric permittivity real part, wherein surveying
Examination Frequency point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz；
Step 7: calculating compensation temperature T1Frequency point is compensated in frequency domain spectra
Test temperature T is calculated using formula (2)2Under each test frequency point fT2_nIn compensation temperature T1Under corresponding frequency values 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；
Step 8: compensation T1Under frequency domain spectral curve
According to test temperature T21Hz to 1000Hz in each Frequency point test to obtain opposite complex dielectric permittivity real part ε ' (T2_
N), using formula (3) to compensation temperature T1The opposite complex dielectric permittivity real part of lower low frequency compensates, and obtains compensation temperature T1Under it is low
Frequency real part compensation result ε ' (T1_ n), according to test temperature T21Hz to 1000Hz in each Frequency point test to obtain relatively answer dielectric
Constant imaginary part ε " (T2_ n), using formula (4) to compensation temperature T1The opposite complex dielectric permittivity real part of lower low frequency compensates, and obtains
Compensation temperature T1Low frequency imaginary part compensation result ε " (T1_ n), wherein test temperature T11Hz to 1000Hz in each test frequency point minute
Not are as follows: 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz, formula (3) and n in formula (4)
=1,2,3,4 ... ..., 11；
Step 9: T1At a temperature of compensation frequency domain spectra and test frequency domain spectra collectively constitute complete dielectric spectroscopy
According to the resulting temperature T of test1The temperature T of the test result of lower 1Hz to 1kHz and the compensation of the 8th step1Lower 1mHz is extremely
1Hz frequency domain spectra compensation result forms compensation temperature T1Dielectric spectroscopy within the scope of lower 1mHz to 1kHz.
Fig. 2 is oil-immersed sleeve pipe dielectric spectroscopy accelerated test platform schematic diagram, from figure 2 it can be seen that of the invention
Experimental system includes capacitor core 1, bracket 2, center copper pipe 3, temperature sensor 4, insulating oil 5, blender 6, heating sheet 7, is situated between
Electricity spectrum tester 8, terminating machine 9, temperature control system 10, compressor 11, condenser pipe 12, insulation fuel tank 13；Capacitor core 1 is by bracket 2
Both ends are fixed, and are mounted in insulation fuel tank 13, and condenser pipe 12 is laid on insulation 13 bottom of fuel tank, are connected to the composition cooling of compressor 11
System, heating sheet 7 and the combination of blender 6 are mounted on insulation 13 bottom of fuel tank, after the 13 inner wall mounting temperature sensor of fuel tank that insulate
Insulating oil 5 is filled, liquid level reaches at the above 1cm in 1 bottom of capacitor core；The temperature control system 10 of built-in AC power source and relay system
Receive temperature sensor 4 data simultaneously be uploaded to terminating machine 9, order transmitting terminal respectively with 10 phase of compressor 11 and temperature control system
Even；8 high-voltage end of dielectric spectra tester and test lead are respectively connected to 1 center copper pipe 3 of capacitor core and end shield, the dielectric spectra number of test
According to being sent to terminating machine 9.
Claims (1)
1. a kind of accelerated test method of oil-immersed sleeve pipe frequency domain dielectric response experiment, it is characterised in that the following steps are included:
Step 1: building oil-immersed sleeve pipe dielectric spectroscopy accelerated test platform
Oil-immersed sleeve pipe dielectric spectroscopy accelerated test platform is built, capacitor core (1) both ends are fixed on insulating oil by bracket (2)
Case (13) bottom, insulation fuel tank (13) is interior to fill insulating oil (5), and liquid level is higher than capacitor core (1) bottom 1cm, insulating oil
Case (13) inner wall arranges temperature sensor (4), insulation fuel tank (13) bottom installation heating sheet (7) and blender (6), heating sheet
(7) it is connected with the temperature control system (10) with AC power source and relay system with blender (6)；Temperature sensor (4) test
Oil temperature data be back to temperature control system (10) and retransmit to terminating machine (9), and the finger that machine (9) communication interface in receiving terminal is sent
It enables, dielectric spectra tester (8) HV Terminal and calibrating terminal are respectively connected to center copper pipe (3) and outermost layer capacitance plate；
Step 2: setting compensation temperature T1, test environment temperature T
Compensation temperature T is set1, test environment temperature T, compensation temperature T1It is thermodynamic temperature with environment temperature T, unit K,
If T is less than T1Third step is then executed, if T is greater than or equal to T1Then execute the 4th step；
Step 3: connecting and controlling temperature elevation system, T is tested1At a temperature of 1Hz to 1kHz test result
Terminating machine (9) control is opened the temperature control system (10) with AC power source and relay system and is heated to insulating oil (5), opens
Blender (6), temperature sensor (4) monitor oil temperature, are back to terminating machine (9), terminating machine (9) monitors that temperature reaches T1Afterwards,
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 ", wherein test frequency point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz,
470Hz, 1000Hz obtain T1At a temperature of test frequency domain spectra, test after the completion of execute the 5th step；
Step 4: connecting and controlling cooling system, T is tested1At a temperature of 1Hz to 1kHz test result
Terminating machine (9) control has the temperature control system (10) of AC power source and relay system, opens compressor (11), passes through condensation
It manages (12) to cool down to insulating oil (5), temperature sensor (4) monitors oil temperature, is back to terminating machine (9), terminating machine (9) monitoring insulation
Oil temperature reaches T1Afterwards, dielectric spectra tester (8) are opened, tests T1At a temperature of 1Hz to 1kHz opposite complex dielectric permittivity real part ε '
With opposite complex dielectric permittivity imaginary part ε ", wherein test frequency point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz,
90Hz, 220Hz, 470Hz, 1000Hz execute the 5th step after the completion of test；
Step 5: calculating test temperature T2
According to the compensation temperature T of setting1, test process initial frequency 1Hz and compensation process initial frequency 1mHz, using formula
(1) the temperature T of test process is calculated2, unit K；
Step 6: test T2At a temperature of result within the scope of 1Hz to 1kHz
Temperature control system (10) is opened, and continues to heat to insulating oil (5), oil temperature reaches test temperature T2, after, open dielectric spectra
Tester (8) tests T2At a temperature of 1Hz to 1kHz opposite complex dielectric permittivity real part and opposite complex dielectric permittivity imaginary part, wherein
Test frequency point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz；
Step 7: calculating compensation temperature T1Frequency point is compensated in frequency domain spectra
Test temperature T is calculated using formula (2)2Under each test frequency point fT2_nIn compensation temperature T1Under corresponding frequency values successively 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；
Step 8: compensation T1Under frequency domain spectral curve
According to test 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 compensation temperature T1The opposite complex dielectric permittivity real part of lower low frequency compensates, and obtains compensation temperature T1Lower low frequency real part
Compensation result ε ' (T1_ n), according to test temperature T21Hz to 1000Hz in each Frequency point to test to obtain opposite complex dielectric permittivity empty
Portion ε " (T2_ n), using formula (4) to compensation temperature T1The opposite complex dielectric permittivity imaginary part of lower low frequency compensates, and obtains compensation temperature
Spend T1Low frequency imaginary part compensation result ε " (T1_ n), wherein test temperature T21Hz to 1000Hz in each test frequency point be respectively as follows:
1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz, formula (3) and n=1 in formula (4), 2,
3,4 ... ..., 11；
Step 9: T1At a temperature of compensation frequency domain spectra and test frequency domain spectra collectively constitute complete dielectric spectroscopy
According to the resulting temperature T of test1The temperature T of the test result of lower 1Hz to 1kHz and the compensation of the 8th step1Lower 1mHz to 1Hz frequency
Compensation result is composed in domain, forms compensation temperature T1Dielectric spectroscopy within the scope of lower 1mHz to 1kHz.
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| CN109061403B (en) * | 2018-06-11 | 2019-09-06 | 西南交通大学 | A kind of method of determining oil-immersed transformer thermal characteristic parameter |
| 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 |
| CN110045246B (en) * | 2019-04-27 | 2020-04-24 | 西南交通大学 | Sleeve aging state evaluation method based on fibers in oil |
| 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 |
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