CN107621574A - Study the experimental method of loading condition setting of casing interior insulation moisture distribution - Google Patents
Study the experimental method of loading condition setting of casing interior insulation moisture distribution Download PDFInfo
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- CN107621574A CN107621574A CN201710739192.1A CN201710739192A CN107621574A CN 107621574 A CN107621574 A CN 107621574A CN 201710739192 A CN201710739192 A CN 201710739192A CN 107621574 A CN107621574 A CN 107621574A
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Abstract
The invention discloses a kind of experimental method for studying loading condition setting of casing interior insulation moisture distribution, first test system building, wetting treatment is carried out to set tube model again, temperature is adjusted to reference temperature, and keep constant, impact load is continuously applied to set tube model with high temperature impact device, the power frequency dielectric loss of sleeve pipe major insulation capacitor core diverse location is obtained with power frequency dielectric loss measuring instrument, according to power frequency dielectric loss and the functional relation of water content, show that impact load is trapped the water content of tube model major insulation diverse location, and major insulation moisture distribution state and diffusion property, to assess the state of making moist of tractive transformer sleeve pipe under impact load.The present invention can simulate uniformly making moist for oil-immersed sleeve pipe major insulation, eliminate influence of the temperature to experimental result, the experiment of major insulation diverse location power frequency high voltage dielectric loss is carried out in the condition, the moisture diffusion characteristic of tractive transformer sleeve pipe under impact load can be obtained, so as to study the mechanism of making moist of tractive transformer sleeve pipe major insulation exactly.
Description
Technical field
The invention belongs to cover pipe insulation experimental field, a kind of research loading condition setting of casing interior insulation moisture distribution is specifically set
Experimental method.
Background technology
With China's high ferro career development, power equipment safety, reliability service in tractive power supply system more cause more
It is pay attention to more.Auxiliary equipment of the sleeve pipe as tractive transformer, the effect of supports insulative device is played to high-voltage connection, it makes moist, always
The state of insulations such as change have material impact to tractive transformer or even whole tractive power supply system.Traction load has very strong rush
Hitting property, have the characteristics that load amplitude of variation is big, overload factor is high, in the presence of impact load, tractive transformer sleeve pipe
The moisture distribution of interior insulation is different from the moisture distribution feature of conventional power bushing shell for transformer, and then in tractive transformer sleeve pipe
Effective assessment of the state of making moist of insulation brings strong influence.In order to effectively assess in tractive transformer sleeve pipe absolutely
The state of making moist of edge, it is necessary to loading condition setting of casing interior insulation moisture distribution feature clear and definite first, therefore it is negative to be badly in need of a kind of research
The experimental method of carrier strip part setting of casing interior insulation moisture distribution.
The content of the invention
In order to study loading condition setting of casing interior insulation moisture distribution feature, the present invention is provided under a kind of research loading condition
The experimental method of sleeve pipe interior insulation moisture distribution, comprises the following steps：
The first step：Test system building
Loading condition is built to trap tube model moisture test system, mainly by special capacitor core, electric drive system,
Power frequency dielectric loss test system, temperature control system, system of making moist composition, sleeve pipe major insulation capacitor core (1) by first insulation every
Plate (6a), the second insulating barrier (6b) cut-off are three layers, are erected at insulation fuel tank (9), insulating oil (10), casing are filled in casing
Inwall installation heating wire (13), condenser pipe (12), cut-in temperature controller (5), temperature controller (5) receive the first TEMP
Device (11a), second temperature sensor (11b) data are by controlling heating wire (13), condenser pipe (12) break-make to control oil temperature；Work
Frequency power transformer (13) output access power frequency dielectric loss measuring instrument (12), power frequency dielectric loss measuring instrument (12) measurement the first measurement terminal of termination
(4a) tests the power frequency dielectric loss of the first insulating barrier (3a), and power frequency dielectric loss measuring instrument (12) measurement the second measurement terminal of termination (4b) is surveyed
Try the power frequency dielectric loss of the second insulating barrier (3b), power frequency dielectric loss measuring instrument (12) measurement the 3rd measurement terminal (4c) of termination test the 3rd
The power frequency dielectric loss of insulating barrier (3c)；The integrated controller with relay system of high temperature impact device (17), controls internal installation
Heating wire heats to the insulating oil (18) of filling, by Oil-temperature control at 0~300 DEG C, passes through flexible pipe (16) and centrifugal pump
(19) closely it is connected with capacitor core (1) center copper pipe (2), the insulating oil (18) of different temperatures is filled with copper pipe (2), simulation set
Pipe is by fuel factor during impact load；Humidifier (20) is formed with insulation fuel tank (9) and closed by flexible pipe (22), circulating pump (21)
Gas channels are closed, moisture is produced and capacitor core (1) is made moist；
Second step：Sleeve pipe wetting treatment
Humidifier (20) is opened, gas moisture establishes gas channels, circulating pump by flexible pipe (22) and insulation fuel tank (9)
(21) circulation is accelerated among flexible pipe (22), humidity controller (23) monitors insulation fuel tank (9) water according to humidity controller (24)
Point, micro- water sensor (25) monitors that capacitor core (1) moisture reaches default rear humidifier (20) work and stopped；
3rd step：Test environment temperature, adjust test temperature
Using the first temperature sensor (11a), second temperature sensor (11b) test environment temperature, if environment temperature is small
In reference temperature, temperature controller (5) connects heating wire (13), raises insulating oil (10) oil temperature, reaches reference temperature；If
Environment temperature is more than reference temperature, and temperature controller (5) connects condenser pipe (12), reduces insulating oil (10) oil temperature, temperature control
Device (5) keeps oil temperature stable in reference temperature by internal relay system, control heating wire (13), condenser pipe (12)；
4th step：High temperature impact device is opened, applies impact load
High temperature impact device (17) is opened, impact load, high temperature impact device (17) oil temperature mould are applied to sleeve pipe major insulation
Intend impact load fuel factor；
5th step：Test power frequency dielectric loss
High temperature impact device (17) operation duration, Industrial Frequency Transformer (14) is opened, output voltage is 10kV DC voltages, is connect
Enter power frequency dielectric loss measuring instrument (15), to by the first insulating barrier of the first insulating barrier (6a), the second insulating barrier (6b) cut-off
(3a), the second insulating barrier (3b), the power frequency dielectric loss of the 3rd insulating barrier (3c) each several part are tested successively；
6th step：Draw sleeve pipe major insulation moisture distribution
According to power frequency dielectric loss and the aqueous relational expression (1) of water content, the first insulating barrier (3a), the second insulating barrier are determined respectively
(3b), the 3rd insulating barrier (3c) water content：
m.ci=ln (- 20.1746+36.63tan δi) (1)
In formula (1), m.ciFor moisture, unit %, tan δiPower frequency dielectric loss is represented, i represents i-th of insulating barrier, takes 1,
2,3。
The beneficial effects of the invention are as follows：The present invention can simulate uniformly making moist for oil-immersed sleeve pipe major insulation, eliminate temperature
Influence to experimental result, the experiment of major insulation diverse location power frequency high voltage dielectric loss is carried out in the condition, impact load can be obtained
The moisture diffusion characteristic of lower tractive transformer sleeve pipe, so as to study the mechanism of making moist of tractive transformer sleeve pipe major insulation exactly.
Brief description of the drawings
Fig. 1 studies the experimental method flow chart of loading condition setting of casing interior insulation moisture distribution.
Fig. 2 loading conditions are trapped tube model moisture test system schematic diagram.
Embodiment
The present invention is further described with specific implementation process below in conjunction with the accompanying drawings.
Fig. 1 is the experimental method flow chart for studying loading condition setting of casing interior insulation moisture distribution, and Fig. 2 is under loading condition
Cover tube model moisture test system schematic diagram.A kind of research loading condition setting of casing interior insulation moisture as can be seen from Figure 1
The experimental method of distribution comprises the following steps：
The first step：Test system building
Loading condition is built to trap tube model moisture test system, mainly by special capacitor core, electric drive system,
Power frequency dielectric loss test system, temperature control system, system of making moist composition, sleeve pipe major insulation capacitor core 1 is by the first insulating barrier
6a, the second insulating barrier 6b cut-off are three layers, are erected at insulation fuel tank 9, and insulating oil 10, cabinet wall installation electricity are filled in casing
Heated filament 13, condenser pipe 12, cut-in temperature controller 5, temperature controller 5 receive the first temperature sensor 11a, second temperature sensing
Device 11b data are by controlling heating wire 13, the break-make of condenser pipe 12 to control oil temperature；The output access power frequency dielectric loss of Industrial Frequency Transformer 13
Tester 12, first measurement terminal 4a of the measurement termination of power frequency dielectric loss measuring instrument 12 test the first insulating barrier 3a power frequency dielectric loss, work
Second measurement terminal 4b of the measurement termination of frequency dielectric loss measuring instrument 12 tests the second insulating barrier 3b power frequency dielectric loss, power frequency dielectric loss measuring instrument
12 the 3rd measurement terminal 4c of measurement termination test the 3rd insulating barrier 3c power frequency dielectric loss；High temperature impact device 17 is integrated to carry relay
The controller of device, the heating wire of internal installation is controlled to heat the insulating oil 18 of filling, by Oil-temperature control 0~300
DEG C, closely it is connected with the center copper pipe 2 of capacitor core 1 by flexible pipe 16 and centrifugal pump 19, the insulating oil 18 of different temperatures is filled with
Copper pipe 2, analog casing is by fuel factor during impact load；Humidifier 20 passes through flexible pipe 22, circulating pump 21 and the insulation shape of fuel tank 9
Into closure gas channels, produce moisture and capacitor core 1 is made moist；
Second step：Sleeve pipe wetting treatment
Humidifier 20 is opened, gas moisture establishes gas channels by flexible pipe 22 and insulation fuel tank 9, and circulating pump 21 is in flexible pipe
Accelerate circulation among 22, humidity controller 23 monitors the insulation moisture of fuel tank 9 according to humidity controller 24, and micro- water sensor 25 monitors
The work of humidifier 20 stops after reaching default to the moisture of capacitor core 1；
3rd step：Test environment temperature, adjust test temperature
Using the first temperature sensor 11a (11a), second temperature sensor 11b test environment temperature, if environment temperature is small
In reference temperature (15 DEG C), temperature controller 5 connects heating wire 13, raises the oil temperature of insulating oil 10, reaches reference temperature；If
Environment temperature is more than reference temperature (15 DEG C), and temperature controller 5 connects condenser pipe 12, reduces the oil temperature of insulating oil 10, temperature control
Device 5 keeps oil temperature stable in reference temperature by internal relay system, control heating wire 13, condenser pipe 12；
4th step：High temperature impact device is opened, applies impact load
High temperature impact device 17 is opened, applies impact load, the simulation punching of the oil temperature of high temperature impact device 17 to sleeve pipe major insulation
Hit load fuel factor；
5th step：Test power frequency dielectric loss
The operation duration of high temperature impact device 17, Industrial Frequency Transformer 14 is opened, output voltage is 10kV DC voltages, accesses work
Frequency dielectric loss measuring instrument 15, to the first insulating barrier 3a, the second insulating barrier separated by the first insulating barrier 6a, the second insulating barrier 6b
3b, the power frequency dielectric loss of the 3rd insulating barrier 3c each several parts are tested successively；
6th step：Draw sleeve pipe major insulation moisture distribution
According to power frequency dielectric loss and the aqueous relational expression (1) of water content, the first insulating barrier 3a, the second insulating barrier are determined respectively
3b, the 3rd insulating barrier 3c water content：
m.ci=ln (- 20.1746+36.63tan δi) (1)
In formula (1), m.ciFor moisture, unit %, tan δiPower frequency dielectric loss is represented, i represents i-th of insulating barrier, takes 1,
2,3。
Claims (1)
1. a kind of experimental method for studying loading condition setting of casing interior insulation moisture distribution, it is characterised in that comprise the following steps：
The first step：Test system building
Build loading condition to trap tube model moisture test system, mainly by special capacitor core, electric drive system, power frequency
Dielectric loss test system, temperature control system, system of making moist composition, sleeve pipe major insulation capacitor core（1）By the first insulating barrier
（6a）, the second insulating barrier（6b）Separate for three layers, be erected at insulation fuel tank（9）, the interior filling insulating oil of casing（10）, in casing
Wall installs heating wire（13）, condenser pipe（12）, cut-in temperature controller（5）, temperature controller（5）Receive the first temperature sensor
（11a）, second temperature sensor（11b）Data are by controlling heating wire（13）, condenser pipe（12）Break-make is to control oil temperature；Power frequency
Transformer（13）Output access power frequency dielectric loss measuring instrument（12）, power frequency dielectric loss measuring instrument（12）Measurement the first measurement terminal of termination
（4a）Test the first insulating barrier（3a）Power frequency dielectric loss, power frequency dielectric loss measuring instrument（12）Measurement the second measurement terminal of termination（4b）Survey
Try the second insulating barrier（3b）Power frequency dielectric loss, power frequency dielectric loss measuring instrument（12）Measurement the 3rd measurement terminal of termination（4c）Test the 3rd
Insulating barrier（3c）Power frequency dielectric loss；High temperature impact device（17）The integrated controller with relay system, control internal installation
Insulating oil of the heating wire to filling（18）Heated, by Oil-temperature control at 0 ~ 300 °C, pass through flexible pipe（16）And centrifugal pump（19）
With capacitor core（1）Center copper pipe（2）Close connection, by the insulating oil of different temperatures（18）It is filled with copper pipe（2）, analog casing by
To fuel factor during impact load；Humidifier（20）Pass through flexible pipe（22）, circulating pump（21）With the fuel tank that insulate（9）Form closure gas
Paths, moisture is produced to capacitor core（1）Made moist；
Second step：Sleeve pipe wetting treatment
Open humidifier（20）, gas moisture passes through flexible pipe（22）With the fuel tank that insulate（9）Establish gas channels, circulating pump（21）
Flexible pipe（22）Centre accelerates circulation, humidity controller（23）According to humidity controller（24）Monitoring insulation fuel tank（9）Moisture, micro- water
Sensor（25）Monitor capacitor core（1）Humidifier after moisture reaches default（20）Work stops；
3rd step：Test environment temperature, adjust test temperature
Use the first temperature sensor（11a）, second temperature sensor（11b）Test environment temperature, if environment temperature is less than ginseng
Examine temperature, temperature controller（5）Connect heating wire（13）, raise insulating oil（10）Oil temperature, reach reference temperature；If environment
Temperature is more than reference temperature, temperature controller（5）Connect condenser pipe（12）, reduce insulating oil（10）Oil temperature, temperature controller（5）
By internal relay system, heating wire is controlled（13）, condenser pipe（12）Keep oil temperature stable in reference temperature；
4th step：High temperature impact device is opened, applies impact load
Open high temperature impact device（17）, impact load, high temperature impact device are applied to sleeve pipe major insulation（17）Oil temperature simulation punching
Hit load fuel factor；
5th step：Test power frequency dielectric loss
High temperature impact device（17）Operation duration, open Industrial Frequency Transformer（14）, output voltage is 10kV DC voltages, accesses work
Frequency dielectric loss measuring instrument（15）, to by the first insulating barrier（6a）, the second insulating barrier（6b）First insulating barrier of cut-off（3a）,
Two insulating barriers（3b）, the 3rd insulating barrier（3c）The power frequency dielectric loss of each several part is tested successively；
6th step：Draw sleeve pipe major insulation moisture distribution
The distribution of moisture in each layer insulation is estimated according to the aqueous relation of power frequency dielectric loss and water content.
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| CN110726910A (en) * | 2019-11-03 | 2020-01-24 | 西南交通大学 | Medium-high voltage power cable terminal moisture intrusion detection device |
| CN111289935A (en) * | 2020-02-25 | 2020-06-16 | 国网江苏省电力有限公司泰州供电分公司 | Moisture distribution testing system of inverted oil-immersed current transformer |
| CN112461942A (en) * | 2020-10-10 | 2021-03-09 | 广西电网有限责任公司电力科学研究院 | High-voltage bushing capacitor core fault diagnosis method and system |
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