CN107561371A - 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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- CN107561371A CN107561371A CN201710739207.4A CN201710739207A CN107561371A CN 107561371 A CN107561371 A CN 107561371A CN 201710739207 A CN201710739207 A CN 201710739207A CN 107561371 A CN107561371 A CN 107561371A
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Abstract
The invention discloses a kind of accelerated test method 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, so as 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 technology
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, with the insulation of metal shell, be power system important component, the peace of its insulating properties direct relation power network
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.
It is required in laboratory during the dielectric spectroscopy test of oil-immersed sleeve pipe interior insulation (frequency range is 1mHz to 1kHz)
Time is longer (be more than 30 minutes), and the testing time of low-frequency range (1mHz to 1Hz) and high-frequency range (1Hz to 1kHz) is respectively
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 dielectric spectroscopy experiment (the oil immersed type set under such as moisture transient state distribution situation of part oil-immersed sleeve pipe interior insulation
The test of pipe interior insulation insulation dielectric spectroscopy) need quick test just to can obtain reliable effective experimental result, therefore it is anxious
Need a kind of accelerated test method of oil-immersed sleeve pipe frequency domain dielectric response experiment.
The content 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, comprises the following steps：
The first step：Build 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 support
Bottom, the interior filling insulating oil of insulation fuel tank, liquid level are higher than capacitor core bottom 1cm, and insulation inner wall of oil tank arrangement temperature passes
Sensor, insulation tank bottoms installation heating plate are connected with agitator with AC power with the temperature control system of relay system；Temperature
The oil temperature data of sensor test is back to temperature control system and retransmited to terminating machine, and the finger that receiving terminal machine communication interface is sent
Order, dielectric spectra tester HV Terminal and calibrating terminal are respectively connected to center copper pipe and outermost layer capacitance plate；
Second step：Compensation temperature T is set1, test environment temperature T
Compensation temperature T is set1, test environment temperature T, compensation temperature T1It is thermodynamic temperature with environment temperature T, unit
For K, if T is less than T1The 3rd step is then performed, if T is more than or equal to T1Then perform the 4th step；
3rd step：Connect and control temperature elevation system, test T1At a temperature of 1Hz to 1kHz test result
Terminating machine control opens the temperature control system with AC power and relay system and insulating oil is heated, and opens stirring
Device, temperature sensor monitors oil temperature are back to terminating machine, and terminating machine monitors that temperature reaches T1Afterwards, dielectric spectra tester is opened
Test T1At a temperature of 1Hz to 1kH relative complex dielectric permittivity real part ε ' and relative 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, obtains T1At a temperature of
Test frequency domain spectra, after the completion of test perform the 5th step；
4th step：Connect and control cooling system, test T1At a temperature of 1Hz to 1kHz test result
Temperature control system of the terminating machine control with AC power and relay system, opens compressor, by condenser pipe to exhausted
Edge oil cooling, temperature sensor monitors oil temperature are back to terminating machine, and terminating machine monitoring insulation oil temperature reaches T1Afterwards, open and be situated between
Electricity spectrum tester, tests T1At a temperature of 1Hz to 1kHz relative complex dielectric permittivity real part ε ' and relative 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 performed after the completion of test；
5th step：Calculate test temperature T2
According to the compensation temperature T of setting1, test process initial frequency 1Hz and compensation process initial frequency 1mHz, use
Formula (1) calculates the temperature T of test process2, unit K；
6th step：Test T2At a temperature of result in the range of 1Hz to 1kHz
Temperature control system is opened, and insulating oil is continued to heat, oil temperature reaches test temperature T2, after, open dielectric spectra and survey
Instrument is tried, tests T2At a temperature of 1Hz to 1kHz relative complex dielectric permittivity real part ε ' and relative complex dielectric permittivity real part ε ", wherein surveying
Examination Frequency point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz；
7th step：Calculate compensation temperature T1Compensation Frequency point in frequency domain spectra
Test temperature T is calculated using formula (2)2Under each test frequency point fT2_nIn compensation 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；
8th step：Compensate T1Under frequency domain spectral curve
According to test temperature T21Hz to 1000Hz in each Frequency point test to obtain relative complex dielectric permittivity real part ε ' (T2_
N), using formula (3) to compensation temperature T1The relative complex dielectric permittivity real part of lower low frequency compensates, and is compensated temperature T1Under it is low
Frequency compensation result ε ' (T1_ n), according to test temperature T21Hz to 1000Hz in each Frequency point test to obtain relative complex dielectric permittivity
Real part ε " (T2_ n), using formula (4) to compensation temperature T1The relative complex dielectric permittivity real part of lower low frequency compensates, and is compensated
Temperature 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；
9th step：T1At a temperature of compensation frequency domain spectra and test frequency domain spectra collectively constitute complete dielectric spectroscopy
According to the temperature T of test gained1Lower 1Hz to 1kHz test result and the temperature T of the 8th step compensation1Lower 1mHz is extremely
1Hz frequency domain spectra compensation results, composition compensation temperature T1Dielectric spectroscopy in the range 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.
Brief description of the drawings
A kind of accelerated test method flow charts 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 diagrames
Embodiment
The invention will be further described below in conjunction with the accompanying 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 comprises the following steps as can be seen from Figure 1：
The first step：Build oil-immersed sleeve pipe dielectric spectroscopy accelerated test platform
Oil-immersed sleeve pipe dielectric spectroscopy accelerated test platform is built, the both ends of capacitor core 1 are fixed on insulating oil by support 2
The bottom of case 13, the interior filling insulating oil 5 of insulation fuel tank 13, liquid level are higher than the bottom 1cm of capacitor core 1, and insulate the inwall of fuel tank 13
Arrange temperature sensor 4, the temperature of insulation fuel tank 13 bottom installation heating plate 7 and agitator 6 with AC power and relay system
Control system 10 is connected；The oil temperature data that temperature sensor 4 is tested is back to temperature control system 10 and retransmited to terminating machine 9, and receives
The instruction that the communication interface of terminating machine 9 is sent, the HV Terminal of dielectric spectra tester 8 and calibrating terminal are respectively connected to the He of center copper pipe 3
Outermost layer capacitance plate；
Second step：Compensation temperature T is set1, test environment temperature T
Compensation temperature T is set1, test environment temperature T, compensation temperature T1It is thermodynamic temperature with environment temperature T, unit
For K, if T is less than T1The 3rd step is then performed, if T is more than or equal to T1Then perform the 4th step；
3rd step：Connect and control temperature elevation system, test T1At a temperature of 1Hz to 1kHz test result
The control of terminating machine 9 opens the temperature control system 10 with AC power and relay system and insulating oil 5 is heated, 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 1kH relative complex dielectric permittivity real part ε ' and relative 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, obtains
T1At a temperature of test frequency domain spectra, after the completion of test perform the 5th step；
4th step：Connect and control cooling system, test T1At a temperature of 1Hz to 1kHz test result
Temperature control system 10 of the control of terminating machine 9 with AC power and relay system, opens compressor 11, passes through condenser pipe
12 pairs of insulating oils 5 cool, 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, tests T1At a temperature of 1Hz to 1kHz relative complex dielectric permittivity real part ε ' with relatively answer dielectric
Constant real part ε ", wherein test frequency point are followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz,
470Hz, 1000Hz, the 5th step is performed after the completion of test；
5th step：Calculate test temperature T2
According to the compensation temperature T of setting1, test process initial frequency 1Hz and compensation process initial frequency 1mHz, use
Formula (1) calculates the temperature T of test process2, unit K；
6th step：Test T2At a temperature of result in the range of 1Hz to 1kHz
Temperature control system 10 is opened, and insulating oil 5 is continued to heat, and oil temperature reaches test temperature T2, after, open dielectric spectra
Tester 8, test T2At a temperature of 1Hz to 1kHz relative complex dielectric permittivity real part ε ' and relative complex dielectric permittivity real part ε ", its
Middle test frequency point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz；
7th step：Calculate compensation temperature T1Compensation Frequency point in frequency domain spectra
Test temperature T is calculated using formula (2)2Under each test frequency point fT2_nIn compensation 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；
8th step：Compensate T1Under frequency domain spectral curve
According to test temperature T21Hz to 1000Hz in each Frequency point test to obtain relative complex dielectric permittivity real part ε ' (T2_
N), using formula (3) to compensation temperature T1The relative complex dielectric permittivity real part of lower low frequency compensates, and is compensated temperature T1Under it is low
Frequency compensation result ε ' (T1_ n), according to test temperature T21Hz to 1000Hz in each Frequency point test to obtain relative complex dielectric permittivity
Real part ε " (T2_ n), using formula (4) to compensation temperature T1The relative complex dielectric permittivity real part of lower low frequency compensates, and is compensated
Temperature 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；
9th step：T1At a temperature of compensation frequency domain spectra and test frequency domain spectra collectively constitute complete dielectric spectroscopy
According to the temperature T of test gained1Lower 1Hz to 1kHz test result and the temperature T of the 8th step compensation1Lower 1mHz is extremely
1Hz frequency domain spectra compensation results, composition compensation temperature T1Dielectric spectroscopy in the range 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 the present invention
Experimental system includes capacitor core 1, support 2, center copper pipe 3, temperature sensor 4, insulating oil 5, agitator 6, heating plate 7, Jie
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 support 2
Both ends are fixed, and in insulation fuel tank 13, condenser pipe 12 is laid on insulation fuel tank 13 bottom, are connected to the composition cooling of compressor 11
System, heating plate 7 and the combination of agitator 6 are arranged on insulation fuel tank 13 bottom, after the inwall mounting temperature sensor of fuel tank 13 that insulate
Insulating oil 5 is filled, liquid level reaches at the bottom above 1cm of capacitor core 1；The temperature control system 10 of built-in AC power and relay system
Receive temperature sensor 4 data simultaneously be uploaded to terminating machine 9, order transmitting terminal respectively with compressor 11 and the phase of temperature control system 10
Even；The high-pressure side of dielectric spectra tester 8 and test lead are respectively connected to the center copper pipe 3 of capacitor core 1 and end shield, the dielectric spectra number of test
According to transmission 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 comprise the following steps：
The first step：Build 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 support (2)
Case (13) bottom, the interior filling insulating oil (5) of insulation fuel tank (13), liquid level are higher than capacitor core (1) bottom 1cm, insulating oil
Case (13) inwall arrangement temperature sensor (4), insulation fuel tank (13) bottom installation heating plate (7) and agitator (6), which carry, to be exchanged
Power supply is connected with the temperature control system (10) of relay system；The oil temperature data of temperature sensor (4) test is back to temperature control system
(10) retransmit to terminating machine (9), and the instruction that receiving terminal machine (9) communication interface is sent, dielectric spectra tester (8) high-pressure side
Son and calibrating terminal are respectively connected to center copper pipe (3) and outermost layer capacitance plate；
Second step：Compensation temperature T is set1, 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 T1The 3rd step is then performed, if T is more than or equal to T1Then perform the 4th step；
3rd step：Connect and control temperature elevation system, test T1At a temperature of 1Hz to 1kHz test result
Terminating machine (9) control opens the temperature control system (10) with AC power and relay system and insulating oil (5) is heated, and opens
Agitator (6), temperature sensor (4) monitoring oil temperature, is back to terminating machine (9), terminating machine (9) monitors that temperature reaches T1Afterwards,
Open dielectric spectra tester (8) test T1At a temperature of 1Hz to 1kH relative complex dielectric permittivity real part ε ' and relative complex dielectric permittivity
Real part ε ", wherein test frequency point are followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz,
1000Hz, obtain T1At a temperature of test frequency domain spectra, after the completion of test perform the 5th step；
4th step：Connect and control cooling system, test T1At a temperature of 1Hz to 1kHz test result
Temperature control system (10) of terminating machine (9) control with AC power and relay system, opens compressor (11), passes through condensation
Manage (12) to cool to insulating oil (5), temperature sensor (4) monitoring oil temperature, be back to terminating machine (9), terminating machine (9) monitoring insulation
Oil temperature reaches T1Afterwards, dielectric spectra tester (8) is opened, tests T1At a temperature of 1Hz to 1kHz relative complex dielectric permittivity real part ε '
With relative 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 performed after the completion of test；
5th step：Calculate 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；
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Wherein test frequency point is followed successively by 1Hz, 2Hz, 5Hz, 10Hz, 20Hz, 42Hz, 60Hz, 90Hz, 220Hz, 470Hz, 1000Hz；
7th step：Calculate compensation temperature T1Compensation Frequency point in frequency domain spectra
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According to test 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 compensation temperature T1The relative complex dielectric permittivity real part of lower low frequency compensates, and is compensated temperature T1Lower low-frequency compensation
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9th step：T1At a temperature of compensation frequency domain spectra and test frequency domain spectra collectively constitute complete dielectric spectroscopy
According to the temperature T of test gained1Lower 1Hz to 1kHz test result and the temperature T of the 8th step compensation1Lower 1mHz to 1Hz frequencies
Compose compensation result, composition compensation temperature T in domain1Dielectric spectroscopy in the range of lower 1mHz to 1kHz.
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