CN109254228A - Converter power transformer insulating material properties evaluation method - Google Patents
Converter power transformer insulating material properties evaluation method Download PDFInfo
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- CN109254228A CN109254228A CN201810892445.3A CN201810892445A CN109254228A CN 109254228 A CN109254228 A CN 109254228A CN 201810892445 A CN201810892445 A CN 201810892445A CN 109254228 A CN109254228 A CN 109254228A
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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
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Abstract
The present invention relates to a kind of converter power transformer insulating material properties evaluation method, the data of the data of the Typical physical characteristic of insulating materials and dielectric property on converter power transformer are obtained；The Typical physical performance data and dielectric property data are handled, then data calculate corresponding standard deviation according to treated；Weight column vector is obtained according to the standard deviation；The score value of Typical physical characteristic and the score value and comprehensive scores of the dielectric property are obtained according to the weight column vector.The present invention is advantageously implemented the technical effect of optimization insulating material properties overall merit.
Description
Technical field
The present invention relates to technical field of electricity, refer in particular to a kind of converter power transformer insulating material properties evaluation method.
Background technique
For converter power transformer as important power transmission and transforming equipment, operational reliability is directly related to the peace of entire electric system
Row for the national games.Currently, major insulation form of the paper oil insulation as converter power transformer, the direct or indirect shadow of each characteristic of insulating board
Reliability, safety and the service life for arriving relevant device are rung, but converter transformer paper oil insulation operating condition is sufficiently complex and dislikes
It is bad, the adjustment of power system frequency characteristic and voltage characteristic, method of operation switching and external environment (such as temperature and humidity)
Variation can all cause the change of the physicochemical property, dielectric property of internal oilpaper major insulation material, to influence integral insulation performance.
Therefore, suitable insulating materials is chosen, is had great importance to converter power transformer operational reliability is improved.
In recent years, less with insulating board performance synthesis evaluation study to the change of current both at home and abroad.For example, existing literature " temperature
And ageing state experimental study that paper oil insulation time domain effect of electromagnetic field is influenced " (Tian Jie, Proceedings of the CSEE,
2012) polarization depolarization current test is taken to oil immersion cardboard test product, has tracked the ageing process of different phase, it was confirmed that temperature
Degree has larger impact to degree of aging curve, and temperature increases or degree of aging increases, and PDC curve can be made to move up, this feature is suitable
For assessing insulation ag(e)ing state.The above-mentioned state only by temperature evaluation insulating materials, thus it is not objective enough, comprehensive.
In order to overcome the above problem, existing Chinese invention patent (CN104076222A) discloses a kind of based on tree topology
The power transmission and transformation equipment state evaluation system of structure, including the detection of lighting location instrument, overhead line temperature monitor, insulator contamination
Instrument, transformer oil detector, Power Quality Detection instrument, transformer neutral point current detecting instrument, data processing module, on-line early warning
Module, intelligent diagnostics module, state evaluation module, risk profile module, maintenance decision module；Wherein, lighting location instrument, aerial
Line temperature monitor, insulator contamination detector, transformer oil detector, Power Quality Detection instrument, transformer neutral point electric current
Detector collectively forms the branch of tree topology.Although it is above-mentioned can the operating status to power transmission and transforming equipment commented in real time
Valence, and maintenance decision is made according to evaluation result, but only under power equipment operating status related data calculated,
Model is constructed, corresponding estimated value is calculated, since running state data is not related to insulating materials Typical physical characteristic and dielectric
Characteristic keeps the building of above-mentioned model unrelated with Typical physical characteristic and dielectric property, therefore evaluation method is not objective enough, comprehensive.
Summary of the invention
For this purpose, technical problem to be solved by the present invention lies in overcome the method for evaluating material property in the prior art inadequate
Objective, comprehensive problem, to provide, a kind of theoretical foundation is abundant, evaluates objective, comprehensive converter power transformer insulating materials
Method of evaluating performance.
In order to solve the above technical problems, a kind of converter power transformer insulating material properties evaluation method of the invention, including
Following steps: the data of the data of the Typical physical characteristic of insulating materials and dielectric property on converter power transformer are obtained；Processing institute
Typical physical performance data and dielectric property data are stated, then Typical physical performance data calculates the routine according to treated
The corresponding standard deviation of physical characteristic indices, according to treated, dielectric property data calculate the dielectric property indices
Corresponding standard deviation；The Typical physical characteristic index is obtained according to the corresponding standard deviation of the Typical physical characteristic indices
Weight column vector, according to the corresponding standard deviation of the dielectric property indices obtain the dielectric property index weight arrange
Vector；The score value of Typical physical characteristic is obtained according to the weight column vector of the Typical physical characteristic index, according to the dielectric
The weight column vector of characteristic index obtains the score value of the dielectric property, and according to the score value of the Typical physical characteristic and institute
The score value for giving an account of electrical characteristics determines comprehensive scores.
In one embodiment of the invention, in the step S1, the dielectric for obtaining insulating materials on converter power transformer is special
The data of property include dielectric property data under different attribute.
In one embodiment of the invention, it in the step S2, handles the Typical physical performance data and dielectric is special
Property data method are as follows: the Typical physical performance data and dielectric property data are handled according to nondimensionalization and in the same directionization.
In one embodiment of the invention, corresponding according to the Typical physical characteristic indices in the step S3
Standard deviation obtain the Typical physical characteristic index weight column vector method are as follows: the Typical physical characteristic items are referred to
Mark corresponding standard deviation and constitute standard deviation column vector, by the standard deviation column vector it is unitization after, it is special to obtain the Typical physical
The weight column vector of property index.
In one embodiment of the invention, in the step S3, according to the corresponding mark of the dielectric property indices
The method that quasi- difference obtains the weight column vector of the dielectric property index are as follows: by the corresponding standard of the dielectric property indices
Difference constitutes multistage standard deviation column vector, by the multistage standard deviation column vector it is unitization after, obtain the dielectric property index
Weight column vector.
In one embodiment of the invention, it in the step S4, is arranged according to the weight of the Typical physical characteristic index
The method that vector obtains the score value of Typical physical characteristic are as follows:, will after the weight column vector for obtaining the Typical physical characteristic index
Its corresponding weight column vector of first data sample Matrix Multiplication is to get the score value for arriving the Typical physical characteristic.
In one embodiment of the invention, the first data sample matrix is that the test Typical physical characteristic obtains
Test value.
In one embodiment of the invention, in the step S4, according to the weight column vector of the dielectric property index
The method for obtaining the score value of the dielectric property are as follows: after the weight column vector of the dielectric property index, by the second data sample
Its corresponding weight column vector of Matrix Multiplication is to get the score value for arriving the dielectric property.
In one embodiment of the invention, the second data sample matrix is that the test dielectric property characteristic obtains
Test value.
In one embodiment of the invention, the comprehensive scores refer to that the score value of Typical physical characteristic and the dielectric are special
The sum of property score value.
The above technical solution of the present invention has the following advantages over the prior art:
Converter power transformer of the present invention insulating material properties evaluation method, due to considering the routine of insulating materials
It is selected based on physical characteristic and dielectric property data, to realize the skill of optimization insulating material properties overall merit
Art effect, and then solve the evaluation method due to when being selected to converter power transformer with insulating materials, using in the related technology
It is not objective enough, comprehensively and the problem of without a large amount of basic test data supportings.
Detailed description of the invention
In order to make the content of the present invention more clearly understood, it below according to specific embodiments of the present invention and combines
Attached drawing, the present invention is described in further detail, wherein
Fig. 1 is converter power transformer insulating material properties evaluation method flow chart of the present invention.
Specific embodiment
As shown in Figure 1, the present embodiment provides a kind of converter power transformer insulating material properties evaluation methods, including walk as follows
It is rapid: step S1: to obtain the data of the data of the Typical physical characteristic of insulating materials and dielectric property on converter power transformer；Step
S2: handling the Typical physical performance data and dielectric property data, then according to treated Typical physical performance data meter
The corresponding standard deviation of the Typical physical characteristic indices is calculated, dielectric property data calculate the dielectric spy according to treated
The property corresponding standard deviation of indices；Step S3: institute is obtained according to the corresponding standard deviation of the Typical physical characteristic indices
The weight column vector for stating Typical physical characteristic index obtains being given an account of according to the corresponding standard deviation of the dielectric property indices
The weight column vector of electrical characteristics index；Step S4: conventional object is obtained according to the weight column vector of the Typical physical characteristic index
The score value for managing characteristic, obtains the score value of the dielectric property according to the weight column vector of the dielectric property index, and according to institute
The score value of the score value and the dielectric property of stating Typical physical characteristic determines comprehensive scores.
The insulating material properties evaluation method of converter power transformer described in the present embodiment in the step S1, obtains the change of current and becomes
The data of the data of the Typical physical characteristic of insulating materials and dielectric property on depressor, since the Typical physical of insulating materials is special
It is selected based on property and dielectric property data, to be conducive to optimize the technology of the insulating material properties overall merit
Effect；In the step S2, the Typical physical performance data and dielectric property data are handled, it is then conventional according to treated
Physical characteristic data calculates the corresponding standard deviation of the Typical physical characteristic indices, according to treated dielectric property data
The corresponding standard deviation of the dielectric property indices is calculated, since indices are required to test repeatedly, mark need to be calculated
It is quasi- poor, and be conducive to calculate the weight of indices according to the standard deviation of indices；In the step S3, according to described
The corresponding standard deviation of Typical physical characteristic indices obtains the weight column vector of the Typical physical characteristic index, according to described
The corresponding standard deviation of dielectric property indices obtains the weight column vector of the dielectric property index, according to the weight arrange to
Amount is conducive to obtain score value；In the step S4, conventional object is obtained according to the weight column vector of the Typical physical characteristic index
The score value for managing characteristic, obtains the score value of the dielectric property according to the weight column vector of the dielectric property index, and according to institute
The score value of the score value and the dielectric property of stating Typical physical characteristic determines comprehensive scores, due to considering the normal of insulating materials
Physical characteristic and dielectric property are advised, and evaluation method is objective, comprehensive, therefore available more accurate overall merit.
In the step S1, the data for obtaining the dielectric property of insulating materials on converter power transformer include being situated between under different attribute
Electrical characteristic data, to be conducive to comprehensively evaluate its performance.
In the step S2, the method that handles the Typical physical performance data and dielectric property data are as follows: according to immeasurable
Guiding principle and in the same directionization handle the Typical physical performance data and dielectric property data.Wherein nondimensionalization refer in order to it is unified into
The supplemental characteristic of not commensurate is gone processed in units by row data operation, the specific formula utilized are as follows:ItsFor the numerical value containing unit；In the same directionization processing be because in different indexs, some
Index value is bigger, and to represent performance better, and the smaller performance that represents of some index values is better, therefore carries out in the same directionization processing, side
Just comparative analysis, the specific formula utilized are as follows:It is wherein describedFor without the numerical value changed in the same direction.It is described normal
Physical characteristic data and dielectric property data are advised after above-mentioned processing, obtained data do not have unit, and have in the same direction.Separately
Outside, the calculation formula of the standard deviation are as follows:Wherein xiBy survey index data value, μ is institute
Survey the average value of achievement data.
In the step S3, the Typical physical is obtained according to the corresponding standard deviation of the Typical physical characteristic indices
The method of the weight column vector of characteristic index are as follows: the corresponding standard deviation of the Typical physical characteristic indices is constituted into standard deviation
Column vector, by the standard deviation column vector it is unitization after, the weight column vector of the Typical physical characteristic index is obtained, such as basis
The standard deviation of four indexs of the Typical physical characteristic is x1、x2、X3、X4, then the weight of the Typical physical characteristic index arranges
Vector Ai=Xi/(x1+x2+x3+x4).The dielectric property is obtained according to the corresponding standard deviation of the dielectric property indices to refer to
The method of target weight column vector are as follows: by the corresponding standard deviation of the dielectric property indices constitute multistage standard deviation arrange to
Amount, by the multistage standard deviation column vector it is unitization after, the weight column vector of the dielectric property index is obtained, according to
The standard deviation of four indexs of dielectric property is y1、y2、y3、y4, then the weight column vector B of the Typical physical characteristic indexi=
yi/(y1+y2+y3+y4)。
In the step S4, point of Typical physical characteristic is obtained according to the weight column vector of the Typical physical characteristic index
The method of value are as follows: after the weight column vector for obtaining the Typical physical characteristic index, by its correspondence of the first data sample Matrix Multiplication
Weight column vector to get arrive the Typical physical characteristic score value, wherein the first data sample matrix is described in test
The test value that Typical physical characteristic obtains.Point of the dielectric property is obtained according to the weight column vector of the dielectric property index
The method of value are as follows: after the weight column vector of the dielectric property index, its corresponding weight column by the second data sample Matrix Multiplication
Vector is to get the score value for arriving the dielectric property, wherein the second data sample matrix is the test dielectric property characteristic
Obtained test value.The comprehensive scores refer to Typical physical characteristic score value and the dielectric property score value and, so as to
Comprehensively to evaluate the performance of the insulating materials.
In the present embodiment, the Typical physical characteristic index includes: the superficial density of insulating materials, water extract conductance
Rate, oil absorbency, the degree of polymerization, expansion and contraction；The dielectric property index includes: relative dielectric constant, volume resistivity, sheet resistance
Rate, dielectric loss.
Obviously, the above embodiments are merely examples for clarifying the description, does not limit the embodiments.For
For those of ordinary skill in the art, other different form variations can also be made on the basis of the above description or are become
It is dynamic.There is no necessity and possibility to exhaust all the enbodiments.And obvious variation extended from this or change
It moves still within the protection scope of the invention.
Claims (10)
1. a kind of converter power transformer insulating material properties evaluation method, which comprises the steps of:
Step S1: the data of the data of the Typical physical characteristic of insulating materials and dielectric property on converter power transformer are obtained；
Step S2: handling the Typical physical performance data and dielectric property data, and then according to treated, Typical physical is special
Property data calculate the corresponding standard deviation of the Typical physical characteristic indices, according to treated, dielectric property data calculate institute
Give an account of the corresponding standard deviation of electrical characteristics indices；
Step S3: the Typical physical characteristic index is obtained according to the corresponding standard deviation of the Typical physical characteristic indices
Weight column vector, according to the weight that the corresponding standard deviation of the dielectric property indices obtains the dielectric property index arrange to
Amount；
Step S4: the score value of Typical physical characteristic is obtained according to the weight column vector of the Typical physical characteristic index, according to institute
The weight column vector for giving an account of electrical characteristics index obtains the score value of the dielectric property, and according to the score value of the Typical physical characteristic
And the score value of the dielectric property determines comprehensive scores.
2. converter power transformer insulating material properties evaluation method according to claim 1, it is characterised in that: the step S1
In, the data for obtaining the dielectric property of insulating materials on converter power transformer include dielectric property data under different attribute.
3. converter power transformer insulating material properties evaluation method according to claim 1, it is characterised in that: the step S2
In, the method that handles the Typical physical performance data and dielectric property data are as follows: according to nondimensionalization and in the same directionization processing institute
State Typical physical performance data and dielectric property data.
4. converter power transformer insulating material properties evaluation method according to claim 1, it is characterised in that: the step S3
In, according to the weight that the corresponding standard deviation of the Typical physical characteristic indices obtains the Typical physical characteristic index arrange to
The method of amount are as follows: the corresponding standard deviation of the Typical physical characteristic indices is constituted into standard deviation column vector, by the standard
After poor column vector is unitization, the weight column vector of the Typical physical characteristic index is obtained.
5. converter power transformer insulating material properties evaluation method according to claim 1, it is characterised in that: the step S3
In, the method for the weight column vector of the dielectric property index is obtained according to the corresponding standard deviation of the dielectric property indices
Are as follows: the corresponding standard deviation of the dielectric property indices is constituted into multistage standard deviation column vector, the multistage standard deviation is arranged
After vector is unitization, the weight column vector of the dielectric property index is obtained.
6. converter power transformer insulating material properties evaluation method according to claim 1, it is characterised in that: the step S4
In, the method for the score value of Typical physical characteristic is obtained according to the weight column vector of the Typical physical characteristic index are as follows: obtain institute
After the weight column vector for stating Typical physical characteristic index, by its corresponding weight column vector of the first data sample Matrix Multiplication to get
To the score value of the Typical physical characteristic.
7. converter power transformer insulating material properties evaluation method according to claim 6, it is characterised in that: first number
It is the test value that the test Typical physical characteristic obtains according to sample matrix.
8. converter power transformer insulating material properties evaluation method according to claim 1, it is characterised in that: the step S4
In, the method for the score value of the dielectric property is obtained according to the weight column vector of the dielectric property index are as follows: the dielectric is special
Property index weight column vector after, by its corresponding weight column vector of the second data sample Matrix Multiplication to get special to the dielectric
The score value of property.
9. converter power transformer insulating material properties evaluation method according to claim 8, it is characterised in that: described second
Data sample matrix is the test value that the test dielectric property characteristic obtains.
10. converter power transformer insulating material properties evaluation method according to claim 1, it is characterised in that: the synthesis
Score value refer to Typical physical characteristic score value and the dielectric property score value and.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110007199A (en) * | 2019-02-14 | 2019-07-12 | 重庆大学 | The voltage tolerance index of solid insulating material determines method, apparatus and intelligent terminal |
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Application publication date: 20190122 |