CN108089102A - A kind of uneven experimental method made moist of oil-immersed sleeve pipe multilayer insulation - Google Patents
A kind of uneven experimental method made moist of oil-immersed sleeve pipe multilayer insulation Download PDFInfo
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- CN108089102A CN108089102A CN201711154774.XA CN201711154774A CN108089102A CN 108089102 A CN108089102 A CN 108089102A CN 201711154774 A CN201711154774 A CN 201711154774A CN 108089102 A CN108089102 A CN 108089102A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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Abstract
This application discloses a kind of uneven experimental methods made moist of oil-immersed sleeve pipe multilayer insulation.This method has built the uneven experiment porch that makes moist of oil-immersed sleeve pipe multilayer insulation first, after oil-immersed sleeve pipe frequency domain character parameter is obtained, the weight factor at characteristic frequency point is calculated, so that it is determined that the status assessment weighted index that makes moist, it is made moist state parameter based on frequency domain character amount estimation casing, and then the state of making moist of sample is assessed, to achieve the purpose that the state of making moist of Control Assay.Using experimental method provided by the invention and platform, it can realize that controllable uneven of oil-immersed sleeve pipe multilayer insulation makes moist.
Description
Technical field
The invention belongs to oil-immersed sleeve pipe state of insulation experimental fields, and in particular to a kind of oil-immersed sleeve pipe multilayer insulation is not
The experimental method uniformly made moist.
Background technology
Oil-immersed sleeve pipe is attached safety device important in electric system, Large Oil immersion transformer is played lead,
The effects that insulation.Engineering actual displayed, casing, which makes moist, accounts for the enormous proportions of casing failure, state of making moist to oil-immersed sleeve pipe it is exhausted
Edge feature is studied to ensureing that power system security reliability service is of great significance.
The casings to make moist at present for the research for the casing that makes moist often by difference is prepared under state test its insulation ginseng
Number, research moisture influence insulation parameter.For the casing that makes moist of preparation, generally use chemical titration is directly tested,
This method not only samples difficulty, but also is making moist in test since the difference of experimenter and equipment can generate large error
Large error can be generated in casing sample preparation.
Dielectric spectroscopy method is a kind of strong interference immunity, carries the informative electric test method of insulating, casing by
Damp status assessment field has a wide range of applications.In order to carry out oil-immersed sleeve pipe multilayer insulation it is accurate it is controllable it is uneven by
Tide is badly in need of a kind of method of experiment, with reference to dielectric spectroscopy, the state of insulation for the casing sample that makes moist is tested and monitored.
The content of the invention
In order to realize oil-immersed sleeve pipe multilayer insulation it is accurate it is controllable it is uneven make moist, the present invention proposes a kind of oil immersed type
The uneven experimental method made moist of casing multilayer insulation.
A kind of uneven experimental method made moist of oil-immersed sleeve pipe multilayer insulation, includes the following steps：
The first step：Build the uneven experiment porch that makes moist of oil-immersed sleeve pipe multilayer insulation；
The uneven experiment porch that makes moist of oil-immersed sleeve pipe multilayer insulation is mainly by oil-immersed sleeve pipe (1), temperature-controlled cabinet
(2), humidity sensor (3), humidity control system (4), humidifier (5), circulating pump (6), hose (7), temperature control system (8), temperature
Sensor (9), heating wire (10), frequency domain spectra tester (11), terminating machine (12) is spent to form；Oil-immersed sleeve pipe (1) is placed in special
In size temperature-controlled cabinet (2), temperature sensor (9) test box body temperature simultaneously reaches temperature control system (8), and then passes through inside
Relay system controls heating wire (10) break-make, ensures that sample carries out being in 15 DEG C of reference temperature, humidifier during frequency domain spectra test
(5), circulating pump (6) is connected by hose (7), closed gas circuit is formed with temperature-controlled cabinet (2), to being in temperature-controlled cabinet
(2) oil-immersed sleeve pipe (1) in carries out wetting treatment, terminating machine (12) time opening frequency domain spectra tester (11), and gathers survey
Try data, assessment oil-immersed sleeve pipe (1) state of making moist, when reach experiment preset value when control shut-off humidity control system (4),
Stop to oil-immersed sleeve pipe (1) wetting treatment, achieve the purpose that control the casing state of making moist, state of centainly being made moist
Sample；
Second step：Obtain the frequency domain character parameter of oil-immersed sleeve pipe；
In the lab, water content is obtained as m.cmaxOil-immersed sleeve pipe sample, place it in temperature-controlled cabinet (2) ginseng
It examines at 15 DEG C of temperature, frequency domain spectra tester (11) is opened, and test water content is m.cmaxOil-immersed sleeve pipe sample in 1Hz,
Dielectric loss value under 0.46Hz, 0.22Hz, dielectric loss value is denoted as tan δ under 1Hz1max, dielectric loss value is denoted as under 0.46Hz
tanδ0.46max, dielectric loss value is denoted as tan δ under 0.22Hz0.22max；
Open humidifier (5), circulating pump (6), start to be opposite to temperature-controlled cabinet (2) oil-immersed sleeve pipe (1) carry out by
Temperature using temperature control system (8) is controlled at 15 DEG C of reference temperature, made moist after a certain period of time by tide processing, frequency domain spectra tester
(11) open, carry out the dielectric loss test of 1Hz, 0.46Hz, 0.22Hz, test result is denoted as tan δ under 1Hz1, under 0.46Hz
Dielectric loss value is denoted as tan δ0.46, dielectric loss value is denoted as tan δ under 0.22Hz0.22；
3rd step：Obtain the weight factor β at characteristic frequency pointi；
By tan δ1max、tanδ0.46max、tanδ0.22maxIt substitutes into respectively in equation below, estimation water content is m.cmaxOil
The weight factor β of immersion casing sample1max、β0.46max、β0.22max；
β1max=0.2545*tan δ1max+0.1093
β0.46max=0.2545*tan δ0.46max+0.2272
β0.22max=0.2541*tan δ0.22max+0.4019
By tan δ1、tanδ0.46、tanδ0.22It substitutes into respectively in equation below, estimation carries out the oil-immersed sleeve pipe of wetting treatment
(1) weight factor β1、β0.46、β0.22；
β1=0.2545*tan δ1+0.1093
β0.46=0.2545*tan δ0.46+0.2272
β0.22=0.2541*tan δ0.22+0.4019
4th step：Determine to make moist the weighted index α of status assessmenti；
By β1max、β0.46max、β0.22maxIt substitutes into equation below, estimation water content is m.cmaxOil-immersed sleeve pipe sample exist
Weighted index α at characteristic frequency1max、α0.46max、α0.22max；
It will carry out the weight factor β of the oil-immersed sleeve pipe (1) of wetting treatment1、β0.46、β0.22It substitutes into equation below, estimation
Obtain weighted index α1、α0.46、α0.22；
5th step：It is made moist state parameter based on the frequency domain character Parameters Calculation casing；
It is m.c according to water contentmaxOil-immersed sleeve pipe sample frequency domain character parameter tan δ1max、tanδ0.46max、tan
δ0.22maxWith weighted index α1max、α0.46max、α0.22max, substitute into equation below, estimation obtains water content as m.cmaxOil immersion
Formula casing makes moist state parameter Gm；
According to the frequency domain character parameter tan δ of the oil-immersed sleeve pipe (1) of wetting treatment1、tanδ0.46、tanδ0.22Refer to weight
Number α1、α0.46、α0.22, substitute into equation below, the oil-immersed sleeve pipe (1) that estimation obtains wetting treatment makes moist state parameter G；
6th step：Assessment oil-immersed sleeve pipe makes moist state；
It is m.c by water contentmaxOil-immersed sleeve pipe make moist state parameter GmWith the oil-immersed sleeve pipe (1) of wetting treatment by
Damp state parameter G is substituted into equation below respectively, is obtained characterizing oil-immersed sleeve pipe and is made moist the coefficient W that makes moist of state；
7th step：Control oil-immersed sleeve pipe makes moist process；
It is made moist coefficient W according to the obtained oil-immersed sleeve pipe (1) of assessment, by itself and experiment preset value comparison, if not up to pre-
If humidity control system (4) continues that humidifier (5) is controlled to carry out wetting treatment to oil-immersed sleeve pipe (1), if reaching default,
Terminating machine (12) control shut-off humidity control system (4) stops process of making moist, obtains the casing that makes moist for meeting preset requirement.
The technical solution that the application provides includes following advantageous effects：
This application provides a kind of experimental method of oil-immersed sleeve pipe humidified insulation, make moist experimental method with existing casing
In, there are larger errors, the accuracy of reduction specimen cannula damp degree during casing makes moist to compare.What the application provided
A kind of uneven experimental method made moist of oil-immersed sleeve pipe multilayer insulation, passes through the uneven reality of making moist of oil-immersed sleeve pipe multilayer insulation
Platform is tested, after obtaining oil-immersed sleeve pipe frequency domain character parameter, the weight factor at characteristic frequency point is calculated, so that it is determined that
The status assessment weighted index that makes moist is made moist state parameter based on frequency domain character amount estimation casing, and then assesses making moist for sample
State, to achieve the purpose that the state of making moist of Control Assay.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of uneven experimental method flow chart to make moist of oil-immersed sleeve pipe multilayer insulation provided in this embodiment；
Fig. 2 is a kind of structural representation of the uneven experiment porch that makes moist of oil-immersed sleeve pipe multilayer insulation provided in this embodiment
Figure.
Reference sign：1st, oil-immersed sleeve pipe, 2, temperature-controlled cabinet, 3, humidity sensor, 4, humidity control system, 5,
Humidifier, 6, circulating pump, 7, hose, 8, temperature control system, 9, temperature sensor, 10, heating wire, 11, frequency domain spectra tester, 12,
Terminating machine.
Specific embodiment
Attached drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the application
Example, and for explaining the principle of the application together with specification.
It in order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of uneven experimental method flow chart to make moist of oil-immersed sleeve pipe multilayer insulation provided in this embodiment,
Referring to Fig. 1, this method comprises the following steps：
S101：Build the uneven experiment porch that makes moist of oil-immersed sleeve pipe multilayer insulation.
Oil-immersed sleeve pipe make moist process and control passes through the uneven experiment of making moist of oil-immersed sleeve pipe multilayer insulation built
Platform is realized.
Attached drawing 2 is refer to, is made moist the figure shows a kind of oil-immersed sleeve pipe multilayer insulation provided in this embodiment is uneven
The structure diagram of experiment porch.
Oil-immersed sleeve pipe multilayer insulation is uneven to make moist experiment porch mainly by oil-immersed sleeve pipe 1, temperature-controlled cabinet 2, wet
Spend sensor 3, humidity control system 4, humidifier 5, circulating pump 6, hose 7, temperature control system 8, temperature sensor 9, heating wire 10,
Frequency domain spectra tester 11, terminating machine 12 are formed.Oil-immersed sleeve pipe 1 is placed in special size temperature-controlled cabinet 2, temperature sensor 9
Test box body temperature simultaneously reaches temperature control system 8, so by internal relay system control 10 break-make of heating wire, ensure sample into
15 DEG C of reference temperature is in when row frequency domain spectra is tested.Humidifier 5, circulating pump 6 are connected by hose 7, are formed with temperature-controlled cabinet 2
Closed gas circuit carries out wetting treatment to the oil-immersed sleeve pipe 1 being in temperature-controlled cabinet 2.
12 time opening frequency domain spectra tester 11 of terminating machine, and collecting test data assess the shape that makes moist of oil-immersed sleeve pipe 1
State, when reach experiment preset value when control shut-off humidity control system 4, stop to 1 wetting treatment of oil-immersed sleeve pipe, reach to set
The purpose that the pipe state of making moist is controlled, the sample for state of centainly being made moist.Effectively reduce artificial and environment during making moist
The error that factor is brought, the state of making moist of the casing sample of preparation more meets experiment and presets, more accurate by moisture capacity, is conducive to
The casing that makes moist is assessing the use in running casing humidified insulation state.
S102：Obtain the frequency domain character parameter of oil-immersed sleeve pipe.
In the lab, water content is obtained as m.cmaxOil-immersed sleeve pipe sample, place it in temperature-controlled cabinet 2 and refer to
At 15 DEG C of temperature, frequency domain spectra tester 11 is opened, and test water content is m.cmaxOil-immersed sleeve pipe sample 1Hz, 0.46Hz,
Dielectric loss value under 0.22Hz, dielectric loss value is denoted as tan δ under 1Hz1max, dielectric loss value is denoted as tan under 0.46Hz
δ0.46max, dielectric loss value is denoted as tan δ under 0.22Hz0.22max。
Humidifier 5, circulating pump 6 are opened, the oil-immersed sleeve pipe 1 for starting to be opposite to temperature-controlled cabinet 2 carries out wetting treatment, makes
Temperature is controlled at 15 DEG C of reference temperature with temperature control system 8, is made moist after a certain period of time, frequency domain spectra tester 11 is opened, and is carried out
The dielectric loss of 1Hz, 0.46Hz, 0.22Hz are tested, and test result is denoted as tan δ under 1Hz1, dielectric loss value is denoted as under 0.46Hz
tanδ0.46, dielectric loss value is denoted as tan δ under 0.22Hz0.22。
S103：Obtain the weight factor β at characteristic frequency pointi。
By tan δ1max、tanδ0.46max、tanδ0.22maxIt substitutes into respectively in equation below, estimation water content is m.cmaxOil
The weight factor β of immersion casing sample1max、β0.46max、β0.22max。
β1max=0.2545*tan δ1max+0.1093
β0.46max=0.2545*tan δ0.46max+0.2272
β0.22max=0.2541*tan δ0.22max+0.4019
By tan δ1、tanδ0.46、tanδ0.22It substitutes into respectively in equation below, estimation carries out the oil-immersed sleeve pipe of wetting treatment
1 weight factor β1、β0.46、β0.22。
β1=0.2545*tan δ1+0.1093
β0.46=0.2545*tan δ0.46+0.2272
β0.22=0.2541*tan δ0.22+0.4019
S104：Determine to make moist the weighted index α of status assessmenti。
By β1max、β0.46max、β0.22maxIt substitutes into equation below, estimation water content is m.cmaxOil-immersed sleeve pipe sample exist
Weighted index α at characteristic frequency1max、α0.46max、α0.22max。
It will carry out the weight factor β of the oil-immersed sleeve pipe 1 of wetting treatment1、β0.46、β0.22It substitutes into equation below, estimates
To weighted index α1、α0.46、α0.22。
S105：It is made moist state parameter based on the frequency domain character Parameters Calculation casing.
It is m.c according to water contentmaxOil-immersed sleeve pipe sample frequency domain character parameter tan δ1max、tanδ0.46max、tan
δ0.22maxWith weighted index α1max、α0.46max、α0.22max, substitute into equation below, estimation obtains water content as m.cmaxOil immersion
Formula casing makes moist state parameter Gm。
According to the frequency domain character parameter tan δ of the oil-immersed sleeve pipe 1 of wetting treatment1、tanδ0.46、tanδ0.22And weighted index
α1、α0.46、α0.22, substitute into equation below, the oil-immersed sleeve pipe 1 that estimation obtains wetting treatment makes moist state parameter G.
S106：Assessment oil-immersed sleeve pipe makes moist state.
The state of making moist of oil-immersed sleeve pipe 1 is characterized using the make moist coefficient that makes moist of state of casing.It is by water content
m.cmaxOil-immersed sleeve pipe make moist state parameter GmIt is substituted into respectively such as with the oil-immersed sleeve pipe 1 of the wetting treatment state parameter G that makes moist
In lower formula, obtain characterizing oil-immersed sleeve pipe and make moist the coefficient W that makes moist of state.
S107：Control oil-immersed sleeve pipe makes moist process.
It is made moist coefficient W according to the obtained oil-immersed sleeve pipe 1 of assessment, by itself and experiment preset value comparison, if not up to default,
Humidity control system 4 continues that humidifier 5 is controlled to carry out wetting treatment to oil-immersed sleeve pipe 1, if reaching default, terminating machine 12 is controlled
System shut-off humidity control system 4, stops process of making moist, obtains the casing that makes moist for meeting preset requirement.With passing through in the prior art
Set pipe insulation in an atmosphere make moist and compare by moisture absorption, effectively reduces environment and error that the factors such as artificial are brought, improves oil
Immersion casing makes moist the accuracy of state, is conducive to use of the casing in assessment runs casing humidified insulation state of making moist.
It is possible it is a kind of in the case of, when the state of making moist of assessment differs larger with testing preset value, can by humidity,
The control of temperature etc. increases the degree for the treatment of to casing humidity of making moist, the process of wetting treatment is adjusted, shorten prepare by
The damp casing required time reduces manufacturing cost.
By oil-immersed sleeve pipe humidified insulation experiment porch, wetting treatment is carried out to oil-immersed sleeve pipe.Experiment is obtained to provide
Fixation water content casing and wetting treatment dielectric loss value of the casing sample under 1HZ, 0.46HZ and 0.22HZ that make moist,
According to the dielectric loss value of acquisition, the weight factor for fixing water content casing and the casing sample that makes moist is calculated using formula.According to
Weighting factor values, calculate fixed water content casing and make moist state weight of the casing at 1HZ, 0.46HZ and 0.22HZ of making moist refers to
Number, and then using the state parameter that makes moist of formula two kinds of casings of calculating.According to the state parameter that makes moist, to the casing sample that makes moist
The state of making moist is assessed, and based on the state of making moist that assessment obtains, the wetting treatment process of casing is regulated and controled.
In the case of possible one kind, during regulating and controlling according to the state of making moist to the process of making moist, the set that makes moist can be obtained
Pipe sample makes moist comparison difference of the state with testing preset value, and the big I for comparing difference directly reacts casing sample and makes moist state
Gap between preset value.According to the comparison difference for the coefficient that makes moist, with reference to the parameter of humidity control system, measurement next time is set to estimate
It calculates the casing sample that makes moist to make moist time of state, avoids the need for taking multiple measurements the state of making moist of casing, save and use energy
While source, the service life of measuring instrument in experiment porch can be increased.
This application provides a kind of experimental method of oil-immersed sleeve pipe humidified insulation, make moist experimental method with existing casing
In, there are larger errors, the accuracy of reduction specimen cannula damp degree during casing makes moist to compare.What the application provided
A kind of uneven experimental method made moist of oil-immersed sleeve pipe multilayer insulation, passes through the uneven reality of making moist of oil-immersed sleeve pipe multilayer insulation
Platform is tested, after obtaining oil-immersed sleeve pipe frequency domain character parameter, the weight factor at characteristic frequency point is calculated, so that it is determined that
The status assessment weighted index that makes moist is made moist state parameter based on frequency domain character amount estimation casing, and then assesses making moist for sample
State, to achieve the purpose that the state of making moist of Control Assay.
It should be noted that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant be intended to it is non-exclusive
Property include so that article or equipment including a series of elements not only include those elements, but also including not having
It the other element that is expressly recited or further includes as elements inherent to such a process, method, article, or device.Do not having
There is the element in the case of more limiting, limited by sentence "including a ...", it is not excluded that including the mistake of the element
Also there are other identical elements in journey, method, article or equipment.
The above is only the specific embodiment of the application, is made skilled artisans appreciate that or realizing this Shen
Please.A variety of modifications of these embodiments will be apparent to one skilled in the art, it is as defined herein
General Principle can in other embodiments be realized in the case where not departing from spirit herein or scope.Therefore, the application
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
It should be appreciated that the content that the application is not limited to be described above and be shown in the drawings, and can
To carry out various modifications and change without departing from the scope.Scope of the present application is only limited by appended claim.
Claims (1)
1. a kind of uneven experimental method made moist of oil-immersed sleeve pipe multilayer insulation, which is characterized in that include the following steps：
The first step：Build the uneven experiment porch that makes moist of oil-immersed sleeve pipe multilayer insulation；
Oil-immersed sleeve pipe multilayer insulation is uneven to make moist experiment porch mainly by oil-immersed sleeve pipe (1), temperature-controlled cabinet (2), wet
Spend sensor (3), humidity control system (4), humidifier (5), circulating pump (6), hose (7), temperature control system (8), temperature sensing
Device (9), heating wire (10), frequency domain spectra tester (11), terminating machine (12) are formed；Oil-immersed sleeve pipe (1) is placed in special size temperature
It spends in control cabinet (2), temperature sensor (9) test box body temperature simultaneously reaches temperature control system (8), and then by inside after Denso
Control heating wire (10) break-make is put, ensures that sample cycled during frequency domain spectra test in 15 DEG C of reference temperature, humidifier (5)
It pumps (6) by hose (7) to be connected, closed gas circuit is formed with temperature-controlled cabinet (2), to being in temperature-controlled cabinet (2)
Oil-immersed sleeve pipe (1) carries out wetting treatment, terminating machine (12) time opening frequency domain spectra tester (11), and collecting test data,
Assess oil-immersed sleeve pipe (1) state of making moist, when reach experiment preset value when control shut-off humidity control system (4), stop pair
Oil-immersed sleeve pipe (1) wetting treatment, achievees the purpose that control the casing state of making moist, the examination for state of centainly being made moist
Sample；
Second step：Obtain the frequency domain character parameter of oil-immersed sleeve pipe；
In the lab, water content is obtained as m.cmaxOil-immersed sleeve pipe sample, place it in temperature-controlled cabinet (2) with reference to temperature
At 15 DEG C of degree, frequency domain spectra tester (11) is opened, and test water content is m.cmaxOil-immersed sleeve pipe sample in 1Hz, 0.46Hz,
Dielectric loss value under 0.22Hz, dielectric loss value is denoted as tan δ under 1Hz1max, dielectric loss value is denoted as tan under 0.46Hz
δ0.46max, dielectric loss value is denoted as tan δ under 0.22Hz0.22max；
Humidifier (5), circulating pump (6) are opened, the oil-immersed sleeve pipe (1) for starting to be opposite to temperature-controlled cabinet (2) carries out the place that makes moist
Temperature using temperature control system (8) is controlled at 15 DEG C of reference temperature, made moist after a certain period of time by reason, frequency domain spectra tester (11)
It opens, carries out the dielectric loss test of 1Hz, 0.46Hz, 0.22Hz, test result is denoted as tan δ under 1Hz1, medium under 0.46Hz
Loss value is denoted as tan δ0.46, dielectric loss value is denoted as tan δ under 0.22Hz0.22；
3rd step：Obtain the weight factor β at characteristic frequency pointi；
By tan δ1max、tanδ0.46max、tanδ0.22maxIt substitutes into respectively in equation below, estimation water content is m.cmaxOil immersed type
The weight factor β of casing sample1max、β0.46max、β0.22max；
β1max=0.2545*tan δ1max+0.1093
β0.46max=0.2545*tan δ0.46max+0.2272
β0.22max=0.2541*tan δ0.22max+0.4019
By tan δ1、tanδ0.46、tanδ0.22It substitutes into respectively in equation below, estimation carries out the oil-immersed sleeve pipe (1) of wetting treatment
Weight factor β1、β0.46、β0.22；
β1=0.2545*tan δ1+0.1093
β0.46=0.2545*tan δ0.46+0.2272
β0.22=0.2541*tan δ0.22+0.4019
4th step：Determine to make moist the weighted index α of status assessmenti；
By β1max、β0.46max、β0.22maxIt substitutes into equation below, estimation water content is m.cmaxOil-immersed sleeve pipe sample in feature
Weighted index α at frequency1max、α0.46max、α0.22max；
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<mi>x</mi>
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</msub>
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It will carry out the weight factor β of the oil-immersed sleeve pipe (1) of wetting treatment1、β0.46、β0.22It substitutes into equation below, estimation obtains
Weighted index α1、α0.46、α0.22；
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<mi>&alpha;</mi>
<mi>i</mi>
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5th step：It is made moist state parameter based on the frequency domain character Parameters Calculation casing；
It is m.c according to water contentmaxOil-immersed sleeve pipe sample frequency domain character parameter tan δ1max、tan0.46max、tanδ0.22max
With weighted index α1max、α0.46max、α0.22max, substitute into equation below, estimation obtains water content as m.cmaxOil-immersed sleeve pipe
Make moist state parameter Gm；
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<msub>
<mi>tan&delta;</mi>
<mrow>
<mn>1</mn>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mrow>
<mn>1</mn>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
</msup>
<mo>+</mo>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>tan&delta;</mi>
<mrow>
<mn>0.46</mn>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mrow>
<mn>0.46</mn>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
</msup>
<mo>+</mo>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>tan&delta;</mi>
<mrow>
<mn>0.22</mn>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mrow>
<mn>0.22</mn>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
</msup>
</mrow>
<mn>3</mn>
</mfrac>
</mrow>
According to the frequency domain character parameter tan δ of the oil-immersed sleeve pipe (1) of wetting treatment1、tanδ0.46、tanδ0.22With weighted index α1、
α0.46、α0.22, substitute into equation below, the oil-immersed sleeve pipe (1) that estimation obtains wetting treatment makes moist state parameter G；
<mrow>
<mi>G</mi>
<mo>=</mo>
<mfrac>
<mrow>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>tan&delta;</mi>
<mn>1</mn>
</msub>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mn>1</mn>
</msub>
</msup>
<mo>+</mo>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>tan&delta;</mi>
<mn>0.46</mn>
</msub>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mn>0.46</mn>
</msub>
</msup>
<mo>+</mo>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>tan&delta;</mi>
<mn>0.22</mn>
</msub>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mn>0.22</mn>
</msub>
</msup>
</mrow>
<mn>3</mn>
</mfrac>
</mrow>
6th step：Assessment oil-immersed sleeve pipe makes moist state；
It is m.c by water contentmaxOil-immersed sleeve pipe make moist state parameter GmIt makes moist state with the oil-immersed sleeve pipe (1) of wetting treatment
Parameter G is substituted into equation below respectively, is obtained characterizing oil-immersed sleeve pipe and is made moist the coefficient W that makes moist of state；
(W values are between 0~1)
7th step：Control oil-immersed sleeve pipe makes moist process；
It is made moist coefficient W according to the obtained oil-immersed sleeve pipe (1) of assessment, it is wet if not up to default by itself and experiment preset value comparison
Degree control system (4) continues that humidifier (5) is controlled to carry out wetting treatment, if reaching default, terminating machine to oil-immersed sleeve pipe (1)
(12) control shut-off humidity control system (4) stops process of making moist, obtains the casing that makes moist for meeting preset requirement.
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