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 PDF

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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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mrow
msub
oil
immersed
tanδ
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CN108089102B (en
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王科
徐肖伟
谭向宇
申元
邹德旭
周仿荣
项恩新
彭晶
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Electric Power Research Institute of Yunnan Power System Ltd
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Electric Power Research Institute of Yunnan Power System Ltd
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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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  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)

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

A kind of uneven experimental method made moist of oil-immersed sleeve pipe multilayer insulation
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)

1.一种油浸式套管多层绝缘不均匀受潮的实验方法，其特征在于，包括如下步骤：1. An experimental method for non-uniform damping of oil-immersed bushing multilayer insulation, characterized in that, comprising the steps: 第一步：搭建油浸式套管多层绝缘不均匀受潮实验平台；Step 1: Build an experimental platform for uneven moisture exposure of multi-layer insulation of oil-immersed bushings; 油浸式套管多层绝缘不均匀受潮实验平台主要由油浸式套管(1)、温度控制箱(2)、湿度传感器(3)、湿度控制系统(4)、加湿器(5)、循环泵(6)、软管(7)、温控系统(8)、温度传感器(9)、电热丝(10)、频域谱测试仪(11)、终端机(12)构成；油浸式套管(1)置于特制尺寸温度控制箱(2)内，温度传感器(9)测试箱体内温度并传至温控系统(8)，进而通过内部继电装置控制电热丝(10)通断，保证试样进行频域谱测试时处于参考温度15℃，加湿器(5)、循环泵(6)通过软管(7)相连，与温度控制箱(2)形成闭合气体回路，对处于温度控制箱(2)中的油浸式套管(1)进行受潮处理，终端机(12)定时开启频域谱测试仪(11)，并采集测试数据，评估油浸式套管(1)的受潮状态，当达到实验预设值时控制关断湿度控制系统(4)，停止对油浸式套管(1)受潮处理，达到对套管受潮状态进行控制的目的，得到一定受潮状态的试样；The oil-immersed bushing multi-layer insulation uneven moisture test platform is mainly composed of oil-immersed bushing (1), temperature control box (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 spectrum tester (11), terminal (12); oil-immersed The casing (1) is placed in a temperature control box (2) of a special size, and the temperature sensor (9) tests the temperature in the box and transmits it to the temperature control system (8), and then controls the heating wire (10) to be turned on and off through the internal relay device , to ensure that the sample is at a reference temperature of 15°C when the frequency domain spectrum test is performed, the humidifier (5) and the circulation pump (6) are connected through a hose (7), and form a closed gas circuit with the temperature control box (2). The oil-immersed bushing (1) in the control box (2) is subjected to damp treatment, and the terminal (12) regularly turns on the frequency domain spectrum tester (11), and collects test data to evaluate the performance of the oil-immersed bushing (1). In the damp state, when the preset value of the experiment is reached, the humidity control system (4) is controlled to be shut down, and the damp treatment of the oil-immersed casing (1) is stopped, so as to achieve the purpose of controlling the damp state of the casing and obtain a certain damp state. Sample; 第二步：获取油浸式套管的频域特征参量；Step 2: Obtain the frequency-domain characteristic parameters of the oil-immersed casing; 在实验室中，得到含水量为m.cmax的油浸式套管试样，将其置于温度控制箱(2)参考温度15℃下，频域谱测试仪(11)开启，测试含水量为m.cmax的油浸式套管试样在1Hz，0.46Hz，0.22Hz下的介质损耗值，1Hz下介质损耗值记为tanδ1max，0.46Hz下介质损耗值记为tanδ0.46max，0.22Hz下介质损耗值记为tanδ0.22max；In the laboratory, an oil-immersed casing sample with a water content of mc max was obtained, placed in the temperature control box (2) at a reference temperature of 15°C, the frequency domain spectrum tester (11) was turned on, and the water content was tested as The dielectric loss value of the oil-immersed casing sample of mc max at 1Hz, 0.46Hz, 0.22Hz, the dielectric loss value at 1Hz is recorded as tanδ 1max , the dielectric loss value at 0.46Hz is recorded as tanδ 0.46max , and the dielectric loss value at 0.22Hz The loss value is recorded as tanδ 0.22max ; 开启加湿器(5)、循环泵(6)，开始对置于温度控制箱(2)的油浸式套管(1)进行受潮处理，使用温控系统(8)将温度控制在参考温度15℃下，受潮一定时间后，频域谱测试仪(11)开启，进行1Hz、0.46Hz、0.22Hz的介质损耗测试，1Hz下测试结果记为tanδ1，0.46Hz下介质损耗值记为tanδ0.46，0.22Hz下介质损耗值记为tanδ0.22；Turn on the humidifier (5) and circulation pump (6), and start to treat the oil-immersed casing (1) placed in the temperature control box (2) with moisture, and use the temperature control system (8) to control the temperature at the reference temperature of 15 At ℃, after being damp for a certain period of time, the frequency domain spectrum tester (11) is turned on, and the dielectric loss test is performed at 1Hz, 0.46Hz, and 0.22Hz. The test result at 1Hz is recorded as tanδ 1 , and the dielectric loss value at 0.46Hz is recorded as tanδ 0.46 , the dielectric loss value at 0.22Hz is recorded as tanδ 0.22 ; 第三步：获取特征频率点处的权重因子βi；Step 3: Obtain the weight factor β i at the characteristic frequency point; 将tanδ1max、tanδ0.46max、tanδ0.22max分别代入如下公式中，估算含水量为m.cmax的油浸式套管试样的权重因子β1max、β0.46max、β0.22max；Substitute tanδ 1max , tanδ 0.46max , and tanδ 0.22max into the following formulas respectively to estimate the weight factors β 1max , β 0.46max , and β 0.22max of the oil-immersed casing sample with water content mc max ; β1max＝0.2545*tanδ1max+0.1093β 1max ＝0.2545*tanδ 1max +0.1093 β0.46max＝0.2545*tanδ0.46max+0.2272β 0.46max ＝0.2545*tanδ 0.46max +0.2272 β0.22max＝0.2541*tanδ0.22max+0.4019β 0.22max ＝0.2541*tanδ 0.22max +0.4019 将tanδ1、tanδ0.46、tanδ0.22分别代入如下公式中，估算进行受潮处理的油浸式套管(1)的权重因子β1、β0.46、β0.22；Substitute tanδ 1 , tanδ 0.46 , and tanδ 0.22 into the following formulas respectively to estimate the weight factors β 1 , β 0.46 , and β 0.22 of the oil-immersed casing (1) subjected to damp treatment; β1＝0.2545*tanδ1+0.1093β 1 =0.2545*tanδ 1 +0.1093 β0.46＝0.2545*tanδ0.46+0.2272β 0.46 ＝0.2545*tanδ 0.46 +0.2272 β0.22＝0.2541*tanδ0.22+0.4019β 0.22 ＝0.2541*tanδ 0.22 +0.4019 第四步：确定受潮状态评估的权重指数αi；Step 4: Determine the weight index α i for the evaluation of the wet state; 将β1max、β0.46max、β0.22max代入如下公式中，估算含水量为m.cmax的油浸式套管试样在特征频率处的权重指数α1max、α0.46max、α0.22max；Substitute β 1max , β 0.46max , and β 0.22max into the following formula to estimate the weight exponents α 1max , α 0.46max , and α 0.22max of the oil-immersed casing sample with water content mc max at the characteristic frequency; <mrow> <msub> <mi>&amp;alpha;</mi> <mrow> <mi>i</mi> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> <mo>=</mo> <mfrac> <msub> <mi>&amp;beta;</mi> <mrow> <mi>i</mi> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> <mrow> <msub> <mi>&amp;beta;</mi> <mrow> <mn>0.22</mn> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>&amp;beta;</mi> <mrow> <mn>0.46</mn> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>&amp;beta;</mi> <mrow> <mn>1</mn> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> </mrow> </mfrac> <mo>,</mo> <mi>i</mi> <mo>=</mo> <mn>0.22</mn> <mo>,</mo> <mn>0.46</mn> <mo>,</mo> <mn>1</mn> </mrow> <mrow><msub><mi>&amp;alpha;</mi><mrow><mi>i</mi><mi>m</mi><mi>a</mi><mi>x</mi>mi></mrow></msub><mo>=</mo><mfrac><msub><mi>&amp;beta;</mi><mrow><mi>i</mi><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub><mrow><msub><mi>&amp;beta;</mi><mrow><mn>0.22</mn><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub><mo>+</mo><msub><mi>&amp;beta;</mi><mrow><mn>0.46</mn><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub><mo>+</mo><msub><mi>&amp;beta;</mi><mrow><mn>1</mn><mi>m</mi><mi>a</mi>mi><mi>x</mi></mrow></msub></mrow></mfrac><mo>,</mo><mi>i</mi><mo>=</mo><mn>0.22</mn><mo>,</mo><mn>0.46</mn><mo>,</mo><mn>1</mn></mrow> 将进行受潮处理的油浸式套管(1)的权重因子β1、β0.46、β0.22代入如下公式中，估算得到权重指数α1、α0.46、α0.22；Substitute the weight factors β 1 , β 0.46 , and β 0.22 of the oil-immersed casing (1) subjected to damp treatment into the following formula, and estimate the weight indices α 1 , α 0.46 , and α 0.22 ; <mrow> <msub> <mi>&amp;alpha;</mi> <mi>i</mi> </msub> <mo>=</mo> <mfrac> <msub> <mi>&amp;beta;</mi> <mi>i</mi> </msub> <mrow> <msub> <mi>&amp;beta;</mi> <mn>0.22</mn> </msub> <mo>+</mo> <msub> <mi>&amp;beta;</mi> <mn>0.46</mn> </msub> <mo>+</mo> <msub> <mi>&amp;beta;</mi> <mn>1</mn> </msub> </mrow> </mfrac> <mo>,</mo> <mi>i</mi> <mo>=</mo> <mn>0.22</mn> <mo>,</mo> <mn>0.46</mn> <mo>,</mo> <mn>1</mn> </mrow> <mrow><msub><mi>&amp;alpha;</mi><mi>i</mi></msub><mo>=</mo><mfrac><msub><mi>&amp;beta;</mi><mi>i</mi></msub><mrow><msub><mi>&amp;beta;</mi><mn>0.22</mn></msub><mo>+</mo><msub><mi>&amp;beta;</mi><mn>0.46</mn></msub><mo>+</mo><msub><mi>&amp;beta;</mi><mn>1</mn></msub></mrow></mfrac><mo>,</mo><mi>i</mi><mo>=</mo><mn>0.22</mn><mo>,</mo><mn>0.46</mn><mo>,</mo><mn>1</mn></mrow> 第五步：基于所述频域特征参量计算套管受潮状态参数；Step 5: Calculating the damp state parameters of the casing based on the frequency domain characteristic parameters; 根据含水量为m.cmax的油浸式套管试样的频域特征参量tanδ1max、tan0.46max、tanδ0.22max和权重指数α1max、α0.46max、α0.22max，代入如下公式中，估算得到含水量为m.cmax的油浸式套管受潮状态参数Gm；According to the frequency domain characteristic parameters tanδ 1max , tan 0.46max , tanδ 0.22max and weight exponents α 1max , α 0.46max , α 0.22max of the oil-immersed casing sample with a water content of mc max , they are substituted into the following formula to estimate The wet state parameter G m of the oil-immersed casing with a water content of mc max ; <mrow> <msub> <mi>G</mi> <mi>m</mi> </msub> <mo>=</mo> <mfrac> <mrow> <msup> <mrow> <mo>(</mo> <msub> <mi>tan&amp;delta;</mi> <mrow> <mn>1</mn> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> <mo>)</mo> </mrow> <msub> <mi>&amp;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&amp;delta;</mi> <mrow> <mn>0.46</mn> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> <mo>)</mo> </mrow> <msub> <mi>&amp;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&amp;delta;</mi> <mrow> <mn>0.22</mn> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> <mo>)</mo> </mrow> <msub> <mi>&amp;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> <mrow><msub><mi>G</mi><mi>m</mi></msub><mo>=</mo><mfrac><mrow><msup><mrow><mo>(</mo><msub><mi>tan&amp;delta;</mi><mrow><mn>1</mn><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub><mo>)</mo></mrow><msub><mi>&amp;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&amp;delta;</mi><mrow><mn>0.46</mn><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub><mo>)</mo></mrow><msub><mi>&amp;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&amp;delta;</mi><mrow><mn>0.22</mn><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub><mo>)</mo></mrow><msub><mi>&amp;alpha;</mi><mrow><mn>0.22</mi>mn><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub></msup></mrow><mn>3</mn></mfrac></mrow> 根据受潮处理的油浸式套管(1)的频域特征参量tanδ1、tanδ0.46、tanδ0.22和权重指数α1、α0.46、α0.22，代入如下公式中，估算得到受潮处理的油浸式套管(1)受潮状态参数G；According to the frequency-domain characteristic parameters tanδ 1 , tanδ 0.46 , tanδ 0.22 and weight exponents α 1 , α 0.46 , α 0.22 of the damp-treated oil-immersed casing (1), they are substituted into the following formula to estimate the damp-treated oil-immersed casing: Casing (1) wet state parameter G; <mrow> <mi>G</mi> <mo>=</mo> <mfrac> <mrow> <msup> <mrow> <mo>(</mo> <msub> <mi>tan&amp;delta;</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> <msub> <mi>&amp;alpha;</mi> <mn>1</mn> </msub> </msup> <mo>+</mo> <msup> <mrow> <mo>(</mo> <msub> <mi>tan&amp;delta;</mi> <mn>0.46</mn> </msub> <mo>)</mo> </mrow> <msub> <mi>&amp;alpha;</mi> <mn>0.46</mn> </msub> </msup> <mo>+</mo> <msup> <mrow> <mo>(</mo> <msub> <mi>tan&amp;delta;</mi> <mn>0.22</mn> </msub> <mo>)</mo> </mrow> <msub> <mi>&amp;alpha;</mi> <mn>0.22</mn> </msub> </msup> </mrow> <mn>3</mn> </mfrac> </mrow> <mrow><mi>G</mi><mo>=</mo><mfrac><mrow><msup><mrow><mo>(</mo><msub><mi>tan&amp;delta;</mi><mn>1</mn></msub><mo>)</mo></mrow><msub><mi>&amp;alpha;</mi><mn>1</mn></msub></msup><mo>+</mo><msup><mrow><mo>(</mo><msub><mi>tan&amp;delta;</mi><mn>0.46</mn></msub><mo>)</mo></mrow><msub><mi>&amp;alpha;</mi><mn>0.46</mn></msub></msup><mo>+</mo><msup><mrow><mo>(</mo><msub><mi>tan&amp;delta;</mi><mn>0.22</mn></msub><mo>)</mo></mrow><msub><mi>&amp;alpha;</mi><mn>0.22</mn></msub></msup></mrow><mn>3</mn></mfrac></mrow> 第六步：评估油浸式套管受潮状态；Step 6: Assess the damp state of the oil-immersed casing; 将含水量为m.cmax的油浸式套管受潮状态参数Gm和受潮处理的油浸式套管(1)受潮状态参数G分别代入如下公式中，得到用于表征油浸式套管受潮状态的受潮系数W；Substituting the damp state parameter G m of the oil-immersed casing with water content mc max and the damp state parameter G of the oil-immersed casing (1) subjected to damp treatment into the following formula respectively, the moisture state used to characterize the oil-immersed casing is obtained The moisture coefficient W; (W取值在0～1之间) (W takes a value between 0 and 1) 第七步：控制油浸式套管受潮过程；Step 7: Control the damp process of the oil-immersed casing; 根据评估得到的油浸式套管(1)受潮系数W，将其与实验预设值对比，若未达到预设，湿度控制系统(4)继续控制加湿器(5)对油浸式套管(1)进行受潮处理，若达到预设，则终端机(12)控制关断湿度控制系统(4)，停止受潮过程，得到符合预设要求的受潮套管。According to the moisture coefficient W of the oil-immersed casing (1) obtained through the evaluation, compare it with the preset value of the experiment. If the preset value is not reached, the humidity control system (4) continues to control the humidifier (5) on the oil-immersed casing. (1) Perform damp treatment, if the preset is reached, the terminal (12) controls to shut down the humidity control system (4), stops the damp process, and obtains a damp sleeve that meets the preset requirements.
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