CN110220982A - Transformer Faults Analysis method and terminal device based on oil chromatography - Google Patents
Transformer Faults Analysis method and terminal device based on oil chromatography Download PDFInfo
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- CN110220982A CN110220982A CN201910517500.5A CN201910517500A CN110220982A CN 110220982 A CN110220982 A CN 110220982A CN 201910517500 A CN201910517500 A CN 201910517500A CN 110220982 A CN110220982 A CN 110220982A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
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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
Abstract
The present invention provides a kind of Transformer Faults Analysis method and terminal device based on oil chromatography, it include: for any selected gas in a variety of selected gases in transformer oil, volume fraction of the selected gas in the transformer oil is calculated in real time, obtains the concentration curve that the selected gas changes over time；In preset time period T, the slope of the concentration curve of the selected gas is obtained, wherein the initial time of the preset time period is t1, the termination time is t2；According to the slope of the concentration curve of a variety of selected gases and/or a variety of selected gases in t2The volume fraction at moment, judges whether the transformer breaks down.Whether the present invention breaks down to transformer and carries out automatic precisely judgement, improve the efficiency for carrying out accident analysis to transformer by the growth rate and volume fraction of the associated gas in real-time monitoring transformer oil.
Description
Technical field
The invention belongs to technical field of electric power detection more particularly to a kind of Transformer Faults Analysis methods based on oil chromatography
And terminal device.
Background technique
Transformer is the important equipment of electric system, and operating status directly affects the level of security of entire electric system.
Insulation ag(e)ing inevitably occurs for transformer and the problems such as Material degradation in During Process of Long-term Operation, and then causes transformation
Device failure.Therefore, detect that the failure of transformer is necessary in time.
Currently, to the monitoring of transformer fault mainly by analyzing transformer oil chromatographic.It is traditional to transformer
The method of oil chromatogram analysis is all the oil in artificial acquisition transformer, then using the method for addition chemical reagent analysis in oil
Gas separated, using analysis, manually the cumbersome work such as calculate and summarize just to can determine that whether transformer occurs former
Barrier.However, largely work dependence is accomplished manually this method, analytical cycle is long, analysis efficiency is low, causes to find in time
The failure of transformer.
Summary of the invention
In view of this, the Transformer Faults Analysis method and terminal that the embodiment of the invention provides a kind of based on oil chromatography are set
It is standby, to solve the problems, such as to carry out accident analysis low efficiency to transformer by oil chromatography in the prior art.
The first aspect of the embodiment of the present invention provides a kind of Transformer Faults Analysis method based on oil chromatography, comprising:
For any selected gas in a variety of selected gases in transformer oil, the selected gas is calculated in real time and is existed
Volume fraction in the transformer oil obtains the concentration curve that the selected gas changes over time；
In preset time period T, the slope of the concentration curve of the selected gas is obtained, wherein the preset time period
Initial time be t1, the termination time is t2；
According to the slope of the concentration curve of a variety of selected gases and/or a variety of selected gases in t2The body at moment
Fraction, judges whether the transformer breaks down.
The second aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer-readable instruction, and the computer-readable instruction realizes following steps when being executed by processor:
For any selected gas in a variety of selected gases in transformer oil, the selected gas is calculated in real time and is existed
Volume fraction in the transformer oil obtains the concentration curve that the selected gas changes over time；
In preset time period T, the slope of the concentration curve of the selected gas is obtained, wherein the preset time period
Initial time be t1, the termination time is t2；
According to the slope of the concentration curve of a variety of selected gases and/or a variety of selected gases in t2The body at moment
Fraction, judges whether the transformer breaks down.
The third aspect of the embodiment of the present invention provides a kind of terminal device, including memory, processor and is stored in
In the memory and the computer-readable instruction that can run on the processor, the processor executes the computer can
Following steps are realized when reading instruction:
For any selected gas in a variety of selected gases in transformer oil, the selected gas is calculated in real time and is existed
Volume fraction in the transformer oil obtains the concentration curve that the selected gas changes over time；
In preset time period T, the slope of the concentration curve of the selected gas is obtained, wherein the preset time period
Initial time be t1, the termination time is t2；
According to the slope of the concentration curve of a variety of selected gases and/or a variety of selected gases in t2The body at moment
Fraction, judges whether the transformer breaks down.
The present invention provides a kind of Transformer Faults Analysis method and terminal device based on oil chromatography, comprising: for change
Any selected gas in a variety of selected gases in depressor oil, calculates the selected gas in the transformer oil in real time
Volume fraction, obtain the concentration curve that the selected gas changes over time；In preset time period T, obtain described selected
The slope of the concentration curve of gas, wherein the initial time of the preset time period is t1, the termination time is t2；According to described more
The slope and/or a variety of selected gases of the concentration curve of the selected gas of kind are in t2The volume fraction at moment judges the change
Whether depressor breaks down.The present invention passes through the growth rate and volume fraction of the associated gas in real-time monitoring transformer oil, right
Whether transformer, which breaks down, carries out automatic precisely judgement, improves the efficiency that accident analysis is carried out to transformer.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of process signal of Transformer Faults Analysis method based on oil chromatography provided in an embodiment of the present invention
Figure；
Fig. 2 is a kind of structural block diagram of the Transformer Faults Analysis device based on oil chromatography provided in an embodiment of the present invention；
Fig. 3 is a kind of signal of the Transformer Faults Analysis terminal device based on oil chromatography provided in an embodiment of the present invention
Figure.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
The Transformer Faults Analysis method based on oil chromatography that the embodiment of the invention provides a kind of.In conjunction with Fig. 1, this method packet
It includes:
S101 is calculated described selected in real time for any selected gas in a variety of selected gases in transformer oil
Volume fraction of the gas in the transformer oil obtains the concentration curve that the selected gas changes over time.
Under normal circumstances, the insulating materials of power transformer uses cardboard and oilpaper, once the fuel tank of transformer goes out
Phenomena such as existing discharge property, insulation ag(e)ing, thermal fault, then will occur it is certain represent gas, and relatively a part of gas can have
In oil, therefore, when whether analysis transformer breaks down, it can be carried out by representative gas present in transformer oil
Research.
Gas in transformer oil can be divided into two kinds according to Crack cause, and one kind is nominal gas, and one kind is bad shape
State gas.In use, megohmite insulant can have a process gradually to wear, the gas quilt that this process occurs to equipment
Referred to as nominal gas；For defective mode gas, refer to when defective mode occurs in equipment, work of the megohmite insulant due to heat and electricity
It mainly include H with the gas of appearance2、CH4、C2H2、C2H4、C2H6Deng.
Therefore, optionally, in embodiments of the present invention, a variety of selected gases include but is not limited to H2、CH4、C2H2、
C2H4、C2H6Deng.
It is selected by a variety of selected gas real-time monitorings in transformer oil, calculating each in a variety of selected gases in real time
Determine volume fraction of the gas in the transformer oil, obtains the concentration curve that each selected gas changes over time.
S102 obtains the slope of the concentration curve of the selected gas, wherein when described default in preset time period T
Between section initial time be t1, the termination time is t2。
The slope of the concentration curve of selected gas represents the trend of the rate of change of selected gas, in general, becoming at any time
Change the volume fraction (unit: μ L/L) of selected gas in trend is gradually increasing, so the concentration curve of selected gas is generally presented
The trend of liter.
Optionally, the embodiment of the present invention provides the method for the slope for the concentration curve that two kinds obtain the selected gas:
First method: judge that the concentration curve of the selected gas whether there is inflection point in the preset time T；If
There are inflection points in the preset time T for the concentration curve of the selected gas, then obtain the time t of inflection point generation0, then pass through
First expression formula obtains the slope k of the concentration curve of the selected gas, first expression formula are as follows:
Wherein, c2It is the selected gas in t2The volume fraction at moment, c0It is the selected gas in t0The volume at moment
Score.
If the concentration curve of selected gas in preset time T there are inflection point, illustrate that the selected gas inflection occurs when
Between t0The reason of trend rapidly risen occurs in moment, and the volume fraction of the selected gas rapidly rises may be certain of transformer
Kind adverse reaction bring, at this time with inflection point beginning to t2The G-bar of this section of curve at place represents entire concentration curve
Slope it is more representative.
Second, judge that the concentration curve of the selected gas whether there is inflection point in the preset time T, if described
Inflection point is not present in the concentration curve of selected gas in the preset time T, then obtains the selected gas by the second expression formula
The slope k of the concentration curve of body, second expression formula are as follows:
Wherein, c2It is the selected gas in t2The volume fraction at moment, c1It is the selected gas in t1The volume at moment
Score.
If inflection point is not present in the concentration curve of selected gas in preset time T, with t1To t2This section of curve at place
G-bar represents the slope of entire concentration curve.
S103, according to the slope of the concentration curve of a variety of selected gases and/or a variety of selected gases in t2When
The volume fraction at quarter, judges whether the transformer breaks down.
Optionally, judge the method whether transformer breaks down for three kinds of offer of the embodiment of the present invention:
First method: if the slope of the concentration curve of the selected gas is more than default slope, and the selected gas
In t2The volume fraction at moment is more than preset threshold corresponding to the selected gas, then judges that the transformer breaks down.
The volume fraction of each selected gas is corresponding with a preset threshold, when this selectes gas in transformer oil
When volume fraction is more than the preset threshold of the selected gas, transformer has been likely to occur adverse reaction.
Optionally, preset threshold corresponding to the volume fraction of each selected gas is preset, can be warp
Value is tested, is also possible to preset by other means, and any two kinds of selected gas, the corresponding preset threshold of volume fraction can
It can also be different with identical, be to be set according to transformer actual conditions, the embodiment of the present invention is not construed as limiting this.
Gas, such as C are selected when there is at least one2H2, volume fraction has been more than its corresponding preset threshold, and its is right
The slope for the concentration curve answered is more than default slope, illustrates C2H2Volume fraction be more than early warning value and its volume fraction short
It is risen rapidly in time, can judge that failure occurs in transformer or incipient fault occurs in transformer at this time.
Second method: the relative coefficient in a variety of selected gases between any two kinds of selected gas is obtained；?
In a variety of selected gases, if the slope of the concentration of the slope and second gas of the concentration curve of first gas is above described
Default slope, and the relative coefficient of the first gas and the second gas is more than or equal to predetermined coefficient, then described in judgement
Transformer breaks down.
A kind of fault type of transformer may correspond to the variation of the content of more than one gas, as transformer electric arc is put
Electricity, discharge current is big, and main decomposition object is C2H2、H2With a small amount of CH4；Partial discharge of transformer, discharge current is small, and main point
Solution object is H2And CH4Deng.
Therefore, the transformer to work for one, there are certain correlations between the selected gases of difference.It is optional
, the correlation between the selected gas of any two can be calculated in the following way:
N sampled data for obtaining the transformer, for any bar sampled data, the sampled data includes described more
The volume fraction of the selected gas of each in the selected gas of kind；For any two kinds of selected gas in a variety of selected gases
Body calculates the correlation coefficient of described two selected gases according to n volume fraction corresponding to described two selected gases.
Specifically, described two selected gases are respectively first gas and second gas, then calculated by third expression formula
The correlation coefficient r of described two selected gases12, wherein the third expression formula are as follows:
Wherein, xiIt is i-th of volume fraction of the first gas,It is integrated for n individual corresponding to the first gas
Several average value, yiIt is i-th of volume fraction of the second gas,For n volume fraction corresponding to the second gas
Average value.
At this point, if the very high selected gas of two correlations, for example, predetermined coefficient 0.5 passes through above-mentioned third table
The relative coefficient of the first gas and second gas that are calculated up to formula is more than or equal to 0.5, then illustrates first gas and second
The degree of correlation of gas is very big, if the above default slope of the slope of the concentration curve of first gas and second gas at this time, explanation
The rate of climb of the volume fraction of first gas and second gas has been above preset range in period T, can sentence at this time
Disconnected transformer has occurred failure or incipient fault has occurred.
The third method: in a variety of selected gases, if first gas is in t2The volume fraction at moment is more than described
Preset threshold corresponding to first gas, second gas is in t2The volume fraction at moment is more than pre- corresponding to the second gas
If threshold value, and the relative coefficient of the first gas and the second gas is more than or equal to predetermined coefficient, then judges the change
Depressor breaks down.
Calculating of the realization of the third method based on gas correlation coefficient selected for any two kinds in second method.
Higher in the degree of correlation, i.e., it is corresponding pre- that the volume fraction that correlation coefficient is more than or equal to two kinds of gases of predetermined coefficient is above its
If when threshold value, illustrating that transformer breaks down or occur incipient fault.
The Transformer Faults Analysis method based on oil chromatography that the present invention provides a kind of, comprising: in transformer oil
Any selected gas in a variety of selected gases calculates volume of the selected gas in the transformer oil point in real time
Number obtains the concentration curve that the selected gas changes over time；In preset time period T, the dense of the selected gas is obtained
Spend slope of a curve, wherein the initial time of the preset time period is t1, the termination time is t2；According to a variety of selected gas
The slope of the concentration curve of body and/or a variety of selected gases are in t2Whether the volume fraction at moment judges the transformer
It breaks down.The present invention passes through the growth rate and volume fraction of the associated gas in real-time monitoring transformer oil, is to transformer
No break down carries out automatic precisely judgement, improves the efficiency that accident analysis is carried out to transformer.
Fig. 2 is a kind of Transformer Faults Analysis schematic device based on oil chromatography provided in an embodiment of the present invention, in conjunction with
Fig. 2, the device include: concentration curve acquiring unit 21, concentration curve slope acquiring unit 22 and transformer fault judging unit
23；
Concentration curve acquiring unit 21, for for any selected gas in a variety of selected gases in transformer oil
Body calculates volume fraction of the selected gas in the transformer oil in real time, obtains the selected gas and changes over time
Concentration curve；
Concentration curve slope acquiring unit 22, for obtaining the concentration curve of the selected gas in preset time period T
Slope, wherein the initial time of the preset time period be t1, the termination time is t2；
Transformer fault judging unit 23, for according to the concentration curves of a variety of selected gases slope and/or institute
A variety of selected gases are stated in t2The volume fraction at moment, judges whether the transformer breaks down.
Optionally, concentration curve slope acquiring unit 22 is used for:
Judge that the concentration curve of the selected gas whether there is inflection point in the preset time T；
If the concentration curve of the selected gas in the preset time T there are inflection point, obtain inflection point generation when
Between t0, then the slope k of the concentration curve of the selected gas, first expression formula are obtained by the first expression formula are as follows:
Wherein, c2It is the selected gas in t2The volume fraction at moment, c0It is the selected gas in t0The volume at moment
Score.
Optionally, concentration curve slope acquiring unit 22 is used for:
Judge that the concentration curve of the selected gas whether there is inflection point in the preset time T, if the selected gas
Inflection point is not present in the concentration curve of body in the preset time T, then obtains the dense of the selected gas by the second expression formula
It writes music the slope k of line, second expression formula are as follows:
Wherein, c2It is the selected gas in t2The volume fraction at moment, c1It is the selected gas in t1The volume at moment
Score.
Optionally, transformer fault judging unit 23 is used for:
If the slope of the concentration curve of the selected gas is more than default slope, and the selected gas is in t2The body at moment
Fraction is more than preset threshold corresponding to the selected gas, then judges that the transformer breaks down.
Optionally, transformer fault judging unit 23 is used for:
Obtain the relative coefficient in a variety of selected gases between any two kinds of selected gas；
In a variety of selected gases, if the slope of the concentration of the slope and second gas of the concentration curve of first gas
The above described default slope, and the relative coefficient of the first gas and the second gas is more than or equal to predetermined coefficient,
Then judge that the transformer breaks down.
Optionally, transformer fault judging unit 23 is used for:
In a variety of selected gases, if first gas is in t2The volume fraction at moment is more than that the first gas institute is right
The preset threshold answered, second gas is in t2The volume fraction at moment is more than preset threshold corresponding to the second gas, and institute
The relative coefficient for stating first gas and the second gas is more than or equal to predetermined coefficient, then judges that event occurs for the transformer
Barrier.
Optionally, which further includes gas correlation coefficient acquiring unit 24, is used for:
N sampled data for obtaining the transformer, for any bar sampled data, the sampled data includes described more
The volume fraction of the selected gas of each in the selected gas of kind；
For any two kinds of selected gas in a variety of selected gases, according to corresponding to described two selected gases
N volume fraction calculates the correlation coefficient of described two selected gases.
Optionally, gas correlation coefficient acquiring unit 24 is used for:
Described two selected gases are respectively first gas and second gas, then are calculated by third expression formula described two
The correlation coefficient r of selected gas12, wherein the third expression formula are as follows:
Wherein, xiIt is i-th of volume fraction of the first gas,It is integrated for n individual corresponding to the first gas
Several average value, yiIt is i-th of volume fraction of the second gas,For n volume fraction corresponding to the second gas
Average value.
The present invention provides a kind of Transformer Faults Analysis device based on oil chromatography, the device are used for: for transformer
Any selected gas in a variety of selected gases in oil, calculates body of the selected gas in the transformer oil in real time
Fraction obtains the concentration curve that the selected gas changes over time；In preset time period T, the selected gas is obtained
Concentration curve slope, wherein the initial time of the preset time period be t1, the termination time is t2；According to a variety of choosings
The slope and/or a variety of selected gases for determining the concentration curve of gas are in t2The volume fraction at moment judges the transformer
Whether break down.The growth rate and volume point that device provided by the invention passes through the associated gas in real-time monitoring transformer oil
Whether number breaks down to transformer and carries out automatic precisely judgement, improve the efficiency for carrying out accident analysis to transformer.
Fig. 3 is a kind of schematic diagram of terminal device provided in an embodiment of the present invention.As shown in figure 3, the terminal of the embodiment
Equipment 3 includes: processor 30, memory 31 and is stored in the memory 31 and can run on the processor 30
Computer program 32, such as the Transformer Faults Analysis program based on oil chromatography.The processor 30 executes the computer journey
The step in above-mentioned each Transformer Faults Analysis embodiment of the method based on oil chromatography is realized when sequence 32, such as shown in FIG. 1
Step 101 is to 103.Alternatively, the processor 30 is realized in above-mentioned each Installation practice respectively when executing the computer program 32
Module/unit function, such as the function of module 21 to 24 shown in Fig. 2.
Illustratively, the computer program 32 can be divided into one or more module/units, it is one or
Multiple module/units are stored in the memory 31, and are executed by the processor 30, to complete the present invention.Described one
A or multiple module/units can be the series of computation machine program instruction section that can complete specific function, which is used for
Implementation procedure of the computer program 32 in the terminal device 3 is described.
The terminal device 3 can be the calculating such as desktop PC, notebook, palm PC and cloud server and set
It is standby.The terminal device may include, but be not limited only to, processor 30, memory 31.It will be understood by those skilled in the art that Fig. 3
The only example of terminal device 3 does not constitute the restriction to terminal device 3, may include than illustrating more or fewer portions
Part perhaps combines certain components or different components, such as the terminal device can also include input-output equipment, net
Network access device, bus etc..
The processor 30 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng.
The memory 31 can be the internal storage unit of the terminal device 3, such as the hard disk or interior of terminal device 3
It deposits.The memory 31 is also possible to the External memory equipment of the terminal device 3, such as be equipped on the terminal device 3
Plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card dodge
Deposit card (Flash Card) etc..Further, the memory 31 can also both include the storage inside list of the terminal device 3
Member also includes External memory equipment.The memory 31 is for storing needed for the computer program and the terminal device
Other programs and data.The memory 31 can be also used for temporarily storing the data that has exported or will export.
The embodiment of the present invention also provides a kind of computer readable storage medium, and the computer-readable recording medium storage has
Computer program, the computer program realize the transformation described in any of the above-described embodiment based on oil chromatography when being executed by processor
The step of device failure analysis methods.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the essence of corresponding technical solution is departed from the spirit and scope of the technical scheme of various embodiments of the present invention, it should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of Transformer Faults Analysis method based on oil chromatography, which is characterized in that this method comprises:
For any selected gas in a variety of selected gases in transformer oil, the selected gas is calculated in real time described
Volume fraction in transformer oil obtains the concentration curve that the selected gas changes over time；
In preset time period T, the slope of the concentration curve of the selected gas is obtained, wherein the preset time period rises
Time beginning is t1, the termination time is t2；
According to the slope of the concentration curve of a variety of selected gases and/or a variety of selected gases in t2The volume at moment point
Number, judges whether the transformer breaks down.
2. the Transformer Faults Analysis method according to claim 1 based on oil chromatography, which is characterized in that described default
In period T, the slope for obtaining the concentration curve of the selected gas includes:
Judge that the concentration curve of the selected gas whether there is inflection point in the preset time T；
If there are inflection points in the preset time T for the concentration curve of the selected gas, the time t of inflection point generation is obtained0,
The slope k of the concentration curve of the selected gas, first expression formula are then obtained by the first expression formula are as follows:
Wherein, c2It is the selected gas in t2The volume fraction at moment, c0It is the selected gas in t0The volume fraction at moment.
3. the Transformer Faults Analysis method according to claim 1 based on oil chromatography, which is characterized in that described default
In period T, the slope for obtaining the concentration curve of the selected gas includes:
Judge that the concentration curve of the selected gas whether there is inflection point in the preset time T, if the selected gas
Inflection point is not present in concentration curve in the preset time T, then the concentration for obtaining the selected gas by the second expression formula is bent
The slope k of line, second expression formula are as follows:
Wherein, c2It is the selected gas in t2The volume fraction at moment, c1It is the selected gas in t1The volume fraction at moment.
4. the Transformer Faults Analysis method according to any one of claims 1 to 3 based on oil chromatography, which is characterized in that
The slope and/or a variety of selected gases of the concentration curve according to a variety of selected gases are in t2The volume at moment point
Number, judging whether the transformer breaks down includes:
If the slope of the concentration curve of the selected gas is more than default slope, and the selected gas is in t2The volume at moment point
Number is more than preset threshold corresponding to the selected gas, then judges that the transformer breaks down.
5. the Transformer Faults Analysis method according to any one of claims 1 to 3 based on oil chromatography, which is characterized in that
The slope and/or a variety of selected gases of the concentration curve according to a variety of selected gases are in t2The volume at moment point
Number, judging whether the transformer breaks down includes:
Obtain the relative coefficient in a variety of selected gases between any two kinds of selected gas；
In a variety of selected gases, if the slope of the concentration of the slope and second gas of the concentration curve of first gas is all super
The default slope is crossed, and the relative coefficient of the first gas and the second gas is more than or equal to predetermined coefficient, then sentences
The transformer that breaks breaks down.
6. the Transformer Faults Analysis method according to claim 5 based on oil chromatography, which is characterized in that described according to institute
The slope and/or a variety of selected gases for stating the concentration curve of a variety of selected gases are in t2The volume fraction at moment judges institute
It states transformer and whether breaks down and include:
In a variety of selected gases, if first gas is in t2The volume fraction at moment is more than corresponding to the first gas
Preset threshold, second gas is in t2The volume fraction at moment is more than preset threshold corresponding to the second gas, and described the
One gas and the relative coefficient of the second gas are more than or equal to predetermined coefficient, then judge that the transformer breaks down.
7. the Transformer Faults Analysis method according to claim 5 based on oil chromatography, which is characterized in that the acquisition institute
Stating the relative coefficient in a variety of selected gases between any two kinds of selected gas includes:
N sampled data for obtaining the transformer, for any bar sampled data, the sampled data includes a variety of choosings
Determine the volume fraction that each in gas selectes gas；
For any two kinds of selected gas in a variety of selected gases, according to n corresponding to described two selected gases
Volume fraction calculates the correlation coefficient of described two selected gases.
8. the Transformer Faults Analysis method according to claim 7 based on oil chromatography, which is characterized in that according to described two
N volume fraction corresponding to the selected gas of kind, the correlation coefficient for calculating described two selected gases include:
Described two selected gases are respectively first gas and second gas, then are calculated by third expression formula described two selected
The correlation coefficient r of gas12, wherein the third expression formula are as follows:
Wherein, xiIt is i-th of volume fraction of the first gas,For n volume fraction corresponding to the first gas
Average value, yiIt is i-th of volume fraction of the second gas,For n volume fraction corresponding to the second gas
Average value.
9. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as claim 1 to 8 of realization the method.
10. a kind of terminal device, which is characterized in that the terminal device includes memory, processor, is stored on the memory
There is the computer program that can be run on the processor, is realized when the processor executes the computer program as right is wanted
The step of seeking any one of 1 to 8 the method.
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