CN106501688A - A kind of meter and the plant paper oil insulation voltage ageing lifetime estimation method of temperature and the double parameters of moisture - Google Patents
A kind of meter and the plant paper oil insulation voltage ageing lifetime estimation method of temperature and the double parameters of moisture Download PDFInfo
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- CN106501688A CN106501688A CN201610915402.3A CN201610915402A CN106501688A CN 106501688 A CN106501688 A CN 106501688A CN 201610915402 A CN201610915402 A CN 201610915402A CN 106501688 A CN106501688 A CN 106501688A
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- moisture
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- voltage ageing
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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
- G01R31/1263—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 of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
Abstract
The invention discloses the plant paper oil insulation voltage ageing lifetime estimation method of a kind of meter and temperature and the double parameters of moisture, comprises the following steps：Step one：Obtain the affecting laws of temperature and moisture to paper oil insulation Electric Field Distribution；Step 2：The double parameter voltage ageing life models of electric-field intensity and temperature, electric-field intensity and moisture are set up respectively；Step 3：Set up the plant paper oil insulation voltage ageing life-span universal equation of meter and temperature and the double parameters of moisture；Step 4：The significance that each parameter of the plant paper oil insulation voltage ageing life-span universal equation of meter and temperature and the double parameters of moisture is checked with stepwise regression analysis.The present invention combines transformer actual operating mode, consideration temperature and moisture the two to transformer safety run threaten the biggest factor synergies, multifactor plant paper oil insulation lifetime estimation method is proposed, the formulation of paper oil insulation safety reliability assessment strategy under different running statuses is realized.
Description
Technical field
The invention belongs to transformer oil paper insulation voltage ageing Life Assessment Technology field, and in particular to a kind of meter and temperature and
The plant paper oil insulation voltage ageing lifetime estimation method of the double parameters of moisture.
Background technology
Main composition form of the paper oil insulation as power transformer interior insulation, is subject to electricity in long-term running
Multi-stress aging based on pressure, temperature and moisture affects, and its insulation life declines, and directly threatens the safe and reliable fortune of transformer
OK.The paper insulated aging characteristics of vegetable oil all concentrate on the effect of the single factor tests such as electric heating at present, lack the multifactor associations such as temperature, moisture
Plant paper oil insulation voltage ageing characteristic research under same-action, and not yet pay close attention to the paper oil insulation life appraisal of different running statuses.
Content of the invention
In consideration of it, a kind of it is an object of the invention to provide plant paper oil insulation voltage ageing of meter and temperature and the double parameters of moisture
Lifetime estimation method.
The purpose of the present invention is achieved through the following technical solutions, the plant of a kind of meter and temperature and the double parameters of moisture
Paper oil insulation voltage ageing lifetime estimation method, comprises the following steps：
Step one：After plant oilpaper is pre-processed, the test product of different tests temperature and original water content is selected and controls
Acceleration electrical ageing test is carried out, the affecting laws of temperature and moisture to paper oil insulation Electric Field Distribution are obtained；
Step 2：Based on temperature and the affecting laws of the lower plant paper oil insulation voltage ageing characteristic of moisture synergy, difference
Set up double parameter voltage ageing life models of electric-field intensity and temperature, electric-field intensity and moisture；
Step 3：According to temperature in the double parameter voltage ageing life models that is set up and the incidence relation of the double parameters of moisture,
Set up the plant paper oil insulation voltage ageing life-span universal equation of meter and temperature and the double parameters of moisture；
Step 4：The plant paper oil insulation voltage ageing longevity that meter and temperature and the double parameters of moisture are checked with stepwise regression analysis
The significance of each parameter of life universal equation.
Further, the plant paper oil insulation voltage ageing life-span universal equation of described meter and temperature and the double parameters of moisture is
In formula, x represents that moisture in paper, E represent that test electric field, L represent Weibull characteristics life, and other parameters are normal
Number；Parameter k1, k2, k3 and k4 are related to moisture, and b1 and b2 are unrelated with moisture for parameter.
Further, the aging life model of the electric-field intensity and temperature：
L=exp (A1+A2U+(B1+B2U)/T)
In formula, L is breakdown time of the paper oil insulation under voltage U and the effect of temperature T；A1, A2, B1 and B2 are constant, with
Experimental enviroment is relevant with specific material character.
Further, based on plant paper oil insulation sample Weibull characteristics life value and equivalent breakdown field at a temperature of different tests
By force, the parameter Estimation of regression model is realized using MATLAB statistics toolbox regress functions：
L=exp (9-0.66E+1959.3/T+149.37E/T).
Further, the plant paper oil insulation voltage ageing life model of electric-field intensity and moisture is set up：
LnL=-kE-mx+n
In formula, k is tolerance coefficient, and m, n are the coefficient correlation that the paper oil insulation voltage ageing life-span tolerates coefficient.
Further, based on plant paper oil insulation sample Weibull characteristics life value under moisture in different paper and equivalent hit
Field intensity is worn, parameter Estimation is carried out using the method for linear fit：
L=e(19.94-121.7x-0.239E).
As a result of above-mentioned technical proposal, the present invention has the advantage that：
The present invention combines transformer actual operating mode, it is considered to temperature and moisture the two transformer safety operation is threatened
The synergy of the biggest factor, proposes multifactor plant paper oil insulation lifetime estimation method, realizes oilpaper under different running statuses
The formulation of insulation safety Reliability assessment strategy, this to vegetable insulating oil popularization and application in large-scale power transformer have important
Scientific meaning and using value.
Description of the drawings
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
The detailed description of one step, wherein：
Fig. 1 is stepwise regression analysis residual error lever diagram；
Fig. 2 is temperature and moisture and the relation of accelerated factor.
Specific embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail；It should be appreciated that preferred embodiment
Only for the explanation present invention, rather than in order to limit the scope of the invention.
A kind of meter and the plant paper oil insulation voltage ageing lifetime estimation method of temperature and the double parameters of moisture, including following step
Suddenly：
Step one：After plant oilpaper is pre-processed, the test product of different tests temperature and original water content is selected and controls
Acceleration electrical ageing test is carried out, the affecting laws of temperature and moisture to paper oil insulation Electric Field Distribution, plant paper oil insulation etc. is obtained
Effect disruptive field intensity and characteristics life increase with moisture as temperature rise and decline；
Step 2：Based on temperature and the affecting laws of the lower plant paper oil insulation voltage ageing characteristic of moisture synergy, from Fig. 2
In as can be seen that original water content higher, temperature is more obvious to the acceleration effect of insulating paper life time decay, and temperature is got over
Height, in paper, moisture is also more obvious to the acceleration effect of insulating paper life time decay.Electric-field intensity and temperature association are set up respectively
FALLOU voltage ageing life models：
L=exp (A1+A2U+(B1+B2U)/T)
In formula, L is breakdown time of the paper oil insulation under voltage U and the effect of temperature T；A1, A2, B1 and B2 are constant, with
Experimental enviroment is relevant with specific material character.Based on plant paper oil insulation sample Weibull characteristics life at a temperature of different tests
Value and equivalent disruptive field intensity, the parameter Estimation for realizing regression model using MATLAB statistics toolbox regress functions：
L=exp (9-0.66E+1959.3/T+149.37E/T)
Set up the plant paper oil insulation voltage ageing life model of electric-field intensity and moisture：
LnL=-kE-mx+n
In formula, x is insulation scraps of paper moisture, and E is equivalent disruptive field intensity.Tolerance coefficient k value is mainly had with test temperature
Close, less, the coefficient correlation of m, n for paper oil insulation voltage ageing life-span tolerance coefficient is affected by moisture in insulating paper.It is based on
Plant paper oil insulation sample Weibull characteristics life value and equivalent disruptive field intensity under moisture in different paper, using linear fit
Method carry out parameter Estimation：
L=e(19.94-121.7x-0.239E)
Step 3：According to temperature in the double parameter voltage ageing life models that is set up and the incidence relation of the double parameters of moisture,
Set up the plant paper oil insulation voltage ageing life-span universal equation of meter and temperature and the double parameters of moisture；
The plant paper oil insulation voltage ageing life-span universal equation of described meter and temperature and the double parameters of moisture is
In formula, x represents that moisture in paper, E represent that test electric field, L represent Weibull characteristics life, and other parameters are normal
Number.Parameter k1、k2、k3And k4Related to moisture, parameter b1And b2Unrelated with moisture.
Step 4：The plant paper oil insulation voltage ageing longevity that meter and temperature and the double parameters of moisture are checked with stepwise regression analysis
The significance of the life each parameter of universal equation, significance are higher, show life model and test data fitting effect compared with
Good.
The present invention combines transformer actual operating mode, it is considered to temperature and moisture the two transformer safety operation is threatened
The synergy of the biggest factor, proposes multifactor plant paper oil insulation lifetime estimation method, realizes oilpaper under different running statuses
The formulation of insulation safety Reliability assessment strategy, this to vegetable insulating oil popularization and application in large-scale power transformer have important
Scientific meaning and using value.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, it is clear that those skilled in the art
Member the present invention can be carried out various change and modification without departing from the spirit and scope of the present invention.So, if the present invention
These modifications and modification belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to comprising these
Including change and modification.
Claims (6)
1. the plant paper oil insulation voltage ageing lifetime estimation method of a kind of meter and the double parameters of temperature and moisture, it is characterised in that：Bag
Include following steps：
Step one：After plant oilpaper is pre-processed, the test product for selecting and controlling different tests temperature and original water content is carried out
Accelerate electrical ageing test, obtain the affecting laws of temperature and moisture to paper oil insulation Electric Field Distribution；
Step 2：Based on temperature and the affecting laws of the lower plant paper oil insulation voltage ageing characteristic of moisture synergy, set up respectively
Electric-field intensity and double parameter voltage ageing life models of temperature, electric-field intensity and moisture；
Step 3：According to temperature in the double parameter voltage ageing life models that is set up and the incidence relation of the double parameters of moisture, set up
Meter and the plant paper oil insulation voltage ageing life-span universal equation of temperature and the double parameters of moisture；
Step 4：Meter and temperature and the plant paper oil insulation voltage ageing life-span of the double parameters of moisture is checked to lead to stepwise regression analysis
Significance with each parameter of equation.
2. the plant paper oil insulation voltage ageing life appraisal side of meter according to claim 1 and the double parameters of temperature and moisture
Method, it is characterised in that：The plant paper oil insulation voltage ageing life-span universal equation of described meter and temperature and the double parameters of moisture is
In formula, x represents that moisture in paper, E represent that test electric field, L represent Weibull characteristics life, and other parameters are constant；
Parameter k1、k2、k3And k4Related to moisture, parameter b1And b2Unrelated with moisture.
3. the plant paper oil insulation voltage ageing life appraisal side of meter according to claim 2 and the double parameters of temperature and moisture
Method, it is characterised in that：The aging life model of the electric-field intensity and temperature：
L=exp (A1+A2U+(B1+B2U)/T)
In formula, L is breakdown time of the paper oil insulation under voltage U and the effect of temperature T；A1、A2、B1And B2For constant, with proving ring
Border is relevant with specific material character.
4. the plant paper oil insulation voltage ageing life appraisal side of meter according to claim 3 and the double parameters of temperature and moisture
Method, it is characterised in that：Based on plant paper oil insulation sample Weibull characteristics life value and equivalent breakdown field at a temperature of different tests
By force, the parameter Estimation of regression model is realized using MATLAB statistics toolbox regress functions：
L=exp (9-0.66E+1959.3/T+149.37E/T).
5. the plant paper oil insulation voltage ageing life appraisal side of meter according to claim 2 and the double parameters of temperature and moisture
Method, it is characterised in that：Set up the plant paper oil insulation voltage ageing life model of electric-field intensity and moisture：
LnL=-kE-mx+n
In formula, k is tolerance coefficient, and m, n are the coefficient correlation that the paper oil insulation voltage ageing life-span tolerates coefficient.
6. the plant paper oil insulation voltage ageing life appraisal side of meter according to claim 5 and the double parameters of temperature and moisture
Method, it is characterised in that：Based on plant paper oil insulation sample Weibull characteristics life value under moisture in different paper and equivalent hit
Field intensity is worn, parameter Estimation is carried out using the method for linear fit：
L=e(19.94-121.7x-0.239E).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390064A (en) * | 2017-08-03 | 2017-11-24 | 中国电力科学研究院 | A kind of ageing test apparatus and application method of insulating oil or paper oil insulation |
| CN108009313A (en) * | 2017-11-03 | 2018-05-08 | 大唐东北电力试验研究所有限公司 | The method that the electric field distribution under polarity inversion in paper oil insulation is determined based on MATLAB |
| CN109696605A (en) * | 2018-10-19 | 2019-04-30 | 中电华创电力技术研究有限公司 | A kind of lifetime estimation method of generator stator bar epoxy resin mica insulation |
| CN110554287A (en) * | 2019-09-20 | 2019-12-10 | 福州大学 | Oil paper insulation micro-water content evaluation method by utilizing backward selection multiple regression analysis |
| CN110954789A (en) * | 2019-11-18 | 2020-04-03 | 大唐东北电力试验研究院有限公司 | Insulation aging identification method for F-level generator |
| CN112364523A (en) * | 2020-11-27 | 2021-02-12 | 江苏方天电力技术有限公司 | Crine model-based insulating material aging life measuring method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390064A (en) * | 2017-08-03 | 2017-11-24 | 中国电力科学研究院 | A kind of ageing test apparatus and application method of insulating oil or paper oil insulation |
| CN108009313A (en) * | 2017-11-03 | 2018-05-08 | 大唐东北电力试验研究所有限公司 | The method that the electric field distribution under polarity inversion in paper oil insulation is determined based on MATLAB |
| CN109696605A (en) * | 2018-10-19 | 2019-04-30 | 中电华创电力技术研究有限公司 | A kind of lifetime estimation method of generator stator bar epoxy resin mica insulation |
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| CN110554287A (en) * | 2019-09-20 | 2019-12-10 | 福州大学 | Oil paper insulation micro-water content evaluation method by utilizing backward selection multiple regression analysis |
| CN110954789A (en) * | 2019-11-18 | 2020-04-03 | 大唐东北电力试验研究院有限公司 | Insulation aging identification method for F-level generator |
| CN112364523A (en) * | 2020-11-27 | 2021-02-12 | 江苏方天电力技术有限公司 | Crine model-based insulating material aging life measuring method |
| CN112364523B (en) * | 2020-11-27 | 2022-07-29 | 江苏方天电力技术有限公司 | Crine model-based insulating material aging life measuring method |
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