CN104112239B - Transformer state evaluation method and device by using reference state analysis - Google Patents
Transformer state evaluation method and device by using reference state analysis Download PDFInfo
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Abstract
The invention provides a transformer state evaluation method and a device by using reference state analysis, wherein the method comprises the following steps: according to the key characteristic quantity of the transformer, evaluating the basic performance and equipment importance of the transformer; and performing mechanical performance evaluation, electrical performance evaluation, thermal performance evaluation and accessory performance evaluation on the transformer; calculating a comprehensive performance correction factor of the transformer according to the basic performance and the evaluation result of the equipment importance; correcting the evaluation results of the corresponding mechanical performance, electrical performance, thermal performance and accessory performance of the transformer according to the comprehensive performance correction factor of the transformer to obtain the total reference state index of the transformer; and determining the transformer needing important attention and the corresponding maintenance strategy according to the total reference state index of the transformer. On the basis of equipment state evaluation guide rules, the invention provides equipment 'reference state' analysis, accurately knows the equipment state, and realizes the purposes of sequentially arranging the basic performance of the equipment from good to bad and guiding operation and maintenance decision.
Description
Technical field
Field, more particularly to the transformer shape that a kind of utilization benchmark state is analyzed are evaluated the present invention relates to power transmission and transformation equipment state
State appraisal procedure and device.
Background technology
Because present power network scale is increasing, so before tour maintenance is carried out to transformer, generally requiring to electricity
Transformer state in net is estimated.Transformer state is estimated and usually chooses a number of significant condition amount,
State to equipment is classified, and is formulated for Strategies of Maintenance and provides foundation.
At present, the foundation for generally being used to transformer assessment in power system industry is transformer state assessment guidelines, i.e.,
Transformer is divided into body, sleeve pipe, shunting switch, five parts of cooling system and non-ionizing energy loss, and choose can directly or
The quantity of state of equipment state is characterized indirectly, and the influence degree of equipment safety operation is classified according to quantity of state.Quantity of state should
Deduction of points value is together decided on by quantity of state degradation and weight, i.e. the quantity of state value that should deduct points multiplies equal to the basic deduction of points of the quantity of state
With weight coefficient, do not deducted points when quantity of state is normal.
When transformer state is evaluated, the total deduction value and individual event deduction of points value for being first depending on each part determine unit status,
Transformer overall evaluation result is comprehensively drawn further according to part evaluation result, transformer evaluation result includes normal, attention, exception
With serious four kinds of states.Because state quantity of the equipment selected in existing transformer state assessment guidelines is generally field test data
Information is measured and patrolled and examined, the running environment of equipment is not considered, is manufactured and designed the parameters such as information, the operation time limit and natural aging, caused
Its evaluation is restricted with application effect, and its reflection directly perceived is to evaluate inaccurate to transformer state, for example to the operation time limit compared with
Long or aging serious equipment lacks concern.
The content of the invention
For the undesirable situation of current transformer state evaluation effect, proposition equipment " benchmark state " of the present invention
(Benchmark) analyze, on the basis of equipment state assessment guidelines, by from characteristic quantity preferably, characteristic quantity analyze, set up set
Standby Ageing Model, equipment strength model, grid strength model, then package is aging, equipment intensity, the aspect of grid strength three are entered
Row equipment health degree assess, solve equipment state on earth how, can normally run, it may occur however that fault rate have many on earth
High problem deeply concerned so that can also be realized to the preliminary of the state of equipment in the case of the new experiment in scene or test data is lacked
Analysis, realizes arranging equipment key property to bad order by good, instructs the purpose of O＆M decision-making.
So-called benchmark state refer to equipment under power network and ambient intensity requirement, all regulation performances of equipment specified are maintained
The state of normal operation.This definition has the connotation of following aspect：One is that " intensity requirement " is included residing for grid strength and equipment
Ambient intensity；Two it is that " all regulation performances maintain normal operation " includes transformer mechanical performance, electric property, hot property, attached
Part performance can maintain normal operation；Three be the first two condition for benchmark state, it is indispensable, complement one another, but equipment base
Quasi- state is not changeless, and when intensity is improved to be required to a certain extent, environment division or all regulation performances can not
Normal operation is maintained, its benchmark state can also become therewith.
In order to solve the above technical problems, the present invention provides a kind of Transformer condition evaluation of utilization benchmark state analysis,
Including：
According to transformer key feature amount, key property and Chemical Apparatus Importance Classification assessment are carried out to transformer；And to described
Transformer carries out mechanical property evaluation, electric property assessment, hot property assessment and annex Performance Evaluation；
According to the result that the key property and Chemical Apparatus Importance Classification are assessed, the combination property modifying factor of the transformer is calculated
Son；
Combination property modifying factor according to the transformer is to transformer correspondence mechanical performance, electric property, heat
The assessment result of performance and annex performance is modified, and obtains the total benchmark state index of transformer；
Total benchmark state index according to the transformer is ranked up to transformer, and according to the result determination needs of sequence
The transformer and corresponding Strategies of Maintenance paid close attention to；
Wherein, the result assessed according to the key property and Chemical Apparatus Importance Classification, calculates the synthesis of the transformer
The performance correction factor, including：
γ as the key property of transformation is set, δ is Chemical Apparatus Importance Classification；Then coordinates of the transformer A in δ-γ coordinate systems is
(δA, γA), wherein 0≤δA≤1,0≤γAThe modifying factor F of≤1, transformer A is the point (δA, γA) arrive reference line l0Away from
From,Wherein described reference line l0Equation be：X+y=0；Wherein F (A) is the modifying factor of transformer
Function.
Wherein, the transformer key feature amount is included but is not limited to：Operation the time limit, temperature, humidity, installation site, away from
Seashore distance, thunder and lightning density, environment species, oil chromatography, straight resistance, top-oil temperature, load coefficient, environment temperature；
The key property and Chemical Apparatus Importance Classification assessment of being carried out to transformer includes：According to the transformer key feature amount
In the operation time limit, environmental factor, on-Line Monitor Device, accident defect factor, operation factor enter to the key property of transformer
Row assessment；Transformer station's important level, substation transformer quantity in the transformer key feature amount, voltage class pair
Importance degree of the transformer in power network is estimated.
Wherein, it is described that mechanical property evaluation, electric property assessment, hot property assessment and annex are carried out to the transformer
Can assess includes：
To mechanical performance K1It is estimated, K1=f (K1_1,K1_2_1,K1_2_2,K1_3,ω1_1,ω1_2,ω1_2_1,ω1_2_2,
ω1_3)；Wherein, ω1_1、ω1_2、ω1_3Respectively design calculating, test assessment, the weight coefficient of post-installation review, three's sum
It is 1；ω1_2_1、ω1_2_2Respectively short-circuit impedance and winding frequency response weight coefficient, K1_1The stabilization safety of verification is calculated for design
Coefficient performance indications, K1_2_1It is impedance voltage result of the test performance indications, K1_2_2For winding frequency response test result performance refers to
Mark, K1_3It is Effect of Short Circuit factor performance indications；
To electric property K2It is estimated, K2=f (K2_1,K2_2,K2_3,ω2_1,ω2_2,ω2_3)；Wherein K2_1、K2_2、K2_3
With ω2_1、ω2_2、ω2_3Respectively oil dissolved gas, oil and winding D.C. resistance performance indications and its corresponding weight
Coefficient；K2Span be [0,1]；
To hot property K3It is estimated；Wherein k indication transformers actual motion
The time limit, FEQAIt is equivalent burn-in value, LnIndication transformer ordinary life, N indication transformers have the operation time limit of partial data.
To annex performance K4It is estimated；K4=f (K4_1,K4_2,K4_3,K4_4,ω4_1,ω4_2,ω4_3,ω4_4), wherein
K4_1,K4_2,K4_3,K4_4With ω4_1,ω4_2,ω4_3,ω4_4The performance indications and weight coefficient of the big performance of annex four are represented respectively,
The big performance of the annex four includes sleeve pipe, shunting switch, cooling system, non-ionizing energy loss performance.
Wherein, the combination property modifying factor according to the transformer is to transformer correspondence mechanical performance, electricity
The assessment result of gas performance, hot property and annex performance is modified, and obtaining the total benchmark state index of transformer includes：
The total benchmark state index BI=F*f (BI of transformerfactor* ω)=F* (BIfactor, W), wherein, F is modifying factor,
BIfactor=(K1,K2,…,K4) it is each point of performance indications vector, W=(ω1,ω2,…,ω4) it is corresponding weight vectors.
Accordingly, the present invention also provides a kind of Transformer State Assessment device of utilization benchmark state analysis, including：
Performance estimation module, for according to transformer key feature amount, carrying out key property to transformer and equipment being important
Degree assessment；And the transformer is carried out mechanical property evaluation, electric property assessment, hot property assessment and annex performance comment
Estimate；
Modifying factor computing module, for the result assessed according to the key property and Chemical Apparatus Importance Classification, calculates described
The combination property modifying factor of transformer；
Total benchmark state index computing module, for according to the combination property modifying factor of the transformer to the transformer
The assessment result of correspondence mechanical performance, electric property, hot property and annex performance is modified, and obtains the total benchmark of transformer
State index；
Strategies of Maintenance management module, is ranked up for the total benchmark state index according to the transformer to transformer, and
The transformer paid close attention to is needed according to the result selection of sequence and select corresponding Strategies of Maintenance；
Wherein, the modifying factor computing module includes：
Coordinate system unit, for setting up δ-γ coordinate systems and reference line l0；The γ is the key property of transformation, and δ is to set
Standby importance degree；Reference line l0Equation be：X+y=0；
First computing unit, for the modifying factor F of calculating transformer；Coordinates of the transformer A in δ-γ coordinate systems be
(δA, γA), wherein 0≤δA≤1,0≤γA≤ 1, then the modifying factor F of transformer A is the point (δA, γA) arrive reference line l0's
Distance,Wherein F (A) is the modifying factor function of transformer.
Wherein, performance estimation module includes：Characteristic quantity acquiring unit and assessment unit；
Characteristic quantity acquiring unit, for obtaining the transformer key feature amount；The transformer key feature amount includes
But it is not limited to：Operation the time limit, temperature, humidity, installation site, away from seashore distance, thunder and lightning density, environment species, oil chromatography, directly
Resistance, top-oil temperature, load coefficient, environment temperature；
First assessment unit, for the fortune in the transformer key feature amount according to acquired in the characteristic quantity acquiring unit
The row time limit, environmental factor, on-Line Monitor Device, accident defect factor, operation factor are estimated to the key property of transformer；
Transformer station's important level, substation transformer quantity, voltage class in the transformer key feature amount is to transformer
Importance degree in power network is estimated.
Wherein, the performance estimation module also includes：
Second assessment unit, for the mechanical performance K to transformer1It is estimated, K1=f (K1_1,K1_2_1,K1_2_2,
K1_3,ω1_1,ω1_2,ω1_2_1,ω1_2_2,ω1_3)；Wherein, ω1_1、ω1_2、ω1_3Respectively design calculating, test assessment,
The weight coefficient of post-installation review, three's sum is 1；ω1_2_1、ω1_2_2Respectively short-circuit impedance and winding frequency response weight coefficient,
K1_1The buckling safety factor performance indications of verification, K are calculated for design1_2_1It is impedance voltage result of the test performance indications, K1_2_2
It is winding frequency response test result performance indications, K1_3It is Effect of Short Circuit factor performance indications；
3rd assessment unit, for transformer to gas performance K2It is estimated, K2=f (K2_1,K2_2,K2_3,ω2_1,
ω2_2,ω2_3)；Wherein K2_1、K2_2、K2_3With ω2_1、ω2_2、ω2_3Respectively oil dissolved gas, oil and direct current are electric
The performance indications of resistance and its corresponding weight coefficient；K2Span be [0,1]；
4th assessment unit, for hot property K3It is estimated；Wherein k tables
Show the transformer actual motion time limit, FEQAIt is equivalent burn-in value, LnIndication transformer ordinary life, N indication transformers have complete number
According to the operation time limit.
5th assessment unit, for annex performance K4It is estimated；K4=f (K4_1,K4_2,K4_3,K4_4,ω4_1,ω4_2,
ω4_3,ω4_4), wherein K4_1,K4_2,K4_3,K4_4With ω4_1,ω4_2,ω4_3,ω4_4The performance of the big performance of annex four is represented respectively
Index and weight coefficient, the big performance of the annex four include sleeve pipe, shunting switch, cooling system, non-ionizing energy loss performance.
Wherein, total benchmark state index computing module includes：
Data capture unit, combination property modifying factor, transformer correspondence machinery for obtaining the transformer
The assessment result of performance, electric property, hot property and annex performance；
Second computing unit, for the combination property modifying factor according to the transformer to transformer correspondence machinery
The assessment result of performance, electric property, hot property and annex performance is modified, and obtains the total benchmark state index of transformer
BI；BI=F*f (BIfactor* ω)=F* (BIfactor, W), wherein, F is modifying factor, BIfactor=(K1,K2,…,K4) it is each
Divide performance indications vector, W=(ω1,ω2,…,ω4) it is corresponding weight vectors.
The Transformer condition evaluation and device of utilization benchmark state provided by the present invention analysis taken into full account design,
The parameter informations such as manufacture, experiment, environment, operation, record of examination, power network, realize equipment benchmark state analysis of key characteristic quantity
It is preferred that, and difference analysis have been carried out to it according to the difference of voltage class, the operation time limit and Chemical Apparatus Importance Classification；Have studied simultaneously
Influence ageing equipment, equipment intensity, the various factors of grid strength, and corresponding correlation model is established respectively.The present invention exists
Consider ageing equipment, equipment intensity, grid strength, set up apparatus assembly and overall benchmark state analysis model, improve shape
The accuracy and reliability of state assessment result, for O＆M decision-making provides strong support and guidance.
Brief description of the drawings
Fig. 1 is that the Transformer condition evaluation first embodiment flow of the utilization benchmark state analysis that the present invention is provided is illustrated
Figure；
Fig. 2 is that the Transformer condition evaluation second embodiment flow of the utilization benchmark state analysis that the present invention is provided is illustrated
Figure；
Fig. 3 is transformer benchmark state index schematic diagram calculation；
Fig. 4 is the flow chart of transformer benchmark state analysis of two-dimensional risk model；
Fig. 5 is the Transformer State Assessment device first embodiment structural representation of the utilization benchmark state analysis that the present invention is provided
Figure；
Fig. 6 is the Transformer State Assessment device second embodiment structural representation of the utilization benchmark state analysis that the present invention is provided
Figure.
Specific embodiment
For the undesirable situation of current transformer state evaluation effect, proposition equipment " benchmark state " of the present invention
(Benchmark) analyze, on the basis of equipment state assessment guidelines, by from characteristic quantity preferably, characteristic quantity analyze, set up set
Standby Ageing Model, equipment strength model, grid strength model, then package is aging, equipment intensity, the aspect of grid strength three are entered
Row equipment health degree assess, solve equipment state on earth how, can normally run, it may occur however that fault rate have many on earth
High problem deeply concerned so that can also be realized to the preliminary of the state of equipment in the case of the new experiment in scene or test data is lacked
Analysis, realizes arranging equipment key property to bad order by good, instructs the purpose of O＆M decision-making.
It is the Transformer condition evaluation first embodiment stream of the utilization benchmark state analysis that the present invention is provided referring to Fig. 1
Journey schematic diagram.As illustrated, the Transformer condition evaluation includes：
Step S101, according to transformer key feature amount, key property and Chemical Apparatus Importance Classification assessment is carried out to transformer；With
And mechanical property evaluation, electric property assessment, hot property assessment and annex Performance Evaluation are carried out to the transformer；
Step S102, according to the result that the key property and Chemical Apparatus Importance Classification are assessed, calculates the synthesis of the transformer
The performance correction factor；
Step S103, the combination property modifying factor according to the transformer is to transformer correspondence mechanical performance, electricity
The assessment result of gas performance, hot property and annex performance is modified, and obtains the total benchmark state index of transformer；
Step S104, the total benchmark state index according to the transformer is ranked up to transformer, and according to the knot of sequence
Fruit determines the transformer and corresponding Strategies of Maintenance for needing to pay close attention to.
It is the Transformer condition evaluation second embodiment stream of the utilization benchmark state analysis that the present invention is provided referring to Fig. 2
Journey schematic diagram.In the present embodiment, the idiographic flow of each step of the Transformer condition evaluation will be described in greater detail
And operation content.As shown in Fig. 2 the Transformer condition evaluation includes：
Step S201, obtains transformer key feature amount, and the transformer key feature amount is included but is not limited to：Operation year
Limit, temperature, humidity, installation site, away from seashore distance, thunder and lightning density, environment species, oil chromatography, straight resistance, top-oil temperature, load
Coefficient, environment temperature.Table 1 is that transformer key feature amount sorts out table.
Table 1
Step S202, according to transformer key feature amount, key property and Chemical Apparatus Importance Classification assessment is carried out to transformer.More
For specifically, the key property and Chemical Apparatus Importance Classification assessment of being carried out to transformer includes：According to the transformer key feature
The key property of the time limit, environmental factor, on-Line Monitor Device, accident defect factor, operation factor to transformer is run in amount
It is estimated；Transformer station's important level, substation transformer quantity in the transformer key feature amount, voltage class
Importance degree to transformer in power network is estimated.
Step S203, according to transformer key feature amount, carries out mechanical property evaluation, electric property and comments to the transformer
Estimate, hot property is assessed and annex Performance Evaluation；More specifically, to mechanical performance K1It is estimated, K1=f (K1_1,K1_2_1,
K1_2_2,K1_3,ω1_1,ω1_2,ω1_2_1,ω1_2_2,ω1_3)；Wherein, ω1_1、ω1_2、ω1_3Respectively design is calculated, tested
Assessment, the weight coefficient of post-installation review, three's sum are 1；ω1_2_1、ω1_2_2Respectively short-circuit impedance and winding frequency response weight
Coefficient, K1_1The buckling safety factor performance indications of verification, K are calculated for design1_2_1It is impedance voltage result of the test performance indications,
K1_2_2It is winding frequency response test result performance indications, K1_3It is Effect of Short Circuit factor performance indications；
To electric property K2It is estimated, K2=f (K2_1,K2_2,K2_3,ω2_1,ω2_2,ω2_3)；Wherein K2_1、K2_2、K2_3
With ω2_1、ω2_2、ω2_3Respectively oil dissolved gas, oil and winding D.C. resistance performance indications and its corresponding weight
Coefficient；K2Span be [0,1], and its value is bigger, and electric property is better.
To hot property K3It is estimated, mainly includes that hot spot temperature of winding is calculated, life loss percentage is calculated and heat
Performance Evaluation.Wherein the k indication transformers actual motion time limit, FEQAIt is equivalent burn-in
Value, LnIndication transformer ordinary life, N indication transformers have the operation time limit of partial data.Its span is 0≤K3≤1,0
Apparatus insulated life termination is represented, 1 represents that the apparatus insulated life-span is good, the equipment equivalent to newly putting into operation.
To annex performance K4It is estimated；K4=f (K4_1,K4_2,K4_3,K4_4,ω4_1,ω4_2,ω4_3,ω4_4), wherein
K4_1,K4_2,K4_3,K4_4With ω4_1,ω4_2,ω4_3,ω4_4The performance indications and weight coefficient of the big performance of annex four are represented respectively.
It will be appreciated by persons skilled in the art that its specific appraisal procedure as shown in figure 3, the specific method of other performance indications and this
It is similar.
Step S204, according to the result that the key property and Chemical Apparatus Importance Classification are assessed, calculates the synthesis of the transformer
The performance correction factor.More specifically, modifying factor builds two by key property assessment result and Chemical Apparatus Importance Classification assessment result
Dimension risk model is obtained, and not only the combination property of equipment below can be modified by modifying factor, while can be with root
Sorted according to the size of modifying factor, pick out the larger equipment of modifying factor and paid close attention to.Two-dimentional risk model such as Fig. 4.Rule
Determine reference line l0Equation be：X+y=0, γ are the key property of transformation, and δ is importance degree；Then a certain transformer A δ-
Coordinate in γ coordinate systems is (δA, γA), wherein 0≤δA≤1,0≤γA≤ 1, then the modifying factor F of transformer A is defined to be somebody's turn to do
Point arrives the distance of reference line, i.e.,Normalization can be obtainedModifying factor F
It is bigger, then it represents that equipment should be of much attention in day-to-day operation.
It will be appreciated by persons skilled in the art that having no wanting on execution sequence between step S202 and step S203
Ask, after the completion of step S201 execution, step S202 and step S203 can just be performed at any time.Meanwhile, in step S202
It is unrelated with whether step S203 performs completion after the completion of execution, you can perform step S204.
Step S205, the combination property modifying factor according to the transformer is to transformer correspondence mechanical performance, electricity
The assessment result of gas performance, hot property and annex performance is modified, and obtains the total benchmark state index of transformer.Specifically
, the total benchmark state index calculation process of transformer is as shown in Figure 3.The total benchmark state index BI=F*f (BI of transformerfactor* ω)=
F*(BIfactor, W), wherein, F is modifying factor, BIfactor=(K1,K2,…,K4) it is each point of performance indications vector, W=(ω1,
ω2,…,ω4) it is corresponding weight vectors, F is modifying factor.BI is bigger for equipment overall performance index, shows that equipment performance is better,
Equipment state is more healthy.
Step S206, the total benchmark state index according to the transformer is ranked up to transformer, and according to the knot of sequence
Fruit determines the transformer and corresponding Strategies of Maintenance for needing to pay close attention to.BI is smaller for equipment overall performance index, shows correspondence transformation
The performance of device is poorer, and equipment state is unhealthy, and out of order probability is higher, needs what is strengthened maintenance and make an inspection tour for this equipment
Density.
The Transformer condition evaluation of utilization benchmark state provided by the present invention analysis taken into full account design, manufacture,
The parameter informations such as experiment, environment, operation, record of examination, power network, realize the preferred of equipment benchmark state analysis of key characteristic quantity,
And difference analysis have been carried out to it according to the difference of voltage class, the operation time limit and Chemical Apparatus Importance Classification；Have studied influence simultaneously
Ageing equipment, equipment intensity, the various factors of grid strength, and corresponding correlation model is established respectively.The present invention is in synthesis
Consider ageing equipment, equipment intensity, grid strength, set up apparatus assembly and overall benchmark state analysis model, the state of improve is commented
The accuracy and reliability of result are estimated, for O＆M decision-making provides strong support and guidance.
Corresponding, the present invention also provides a kind of Transformer State Assessment device of utilization benchmark state analysis, the transformer shape
State apparatus for evaluating can realize the Transformer condition evaluation of above-mentioned utilization benchmark state analysis.
It is the Transformer State Assessment device first embodiment knot of the utilization benchmark state analysis that the present invention is provided referring to Fig. 5
Structure schematic diagram, as illustrated, the device includes：Performance estimation module 1, modifying factor computing module 2, total benchmark state index is calculated
Module 3 and Strategies of Maintenance management module 4.
Performance estimation module 1, for according to transformer key feature amount, carrying out key property to transformer and equipment being important
Degree assessment；And the transformer is carried out mechanical property evaluation, electric property assessment, hot property assessment and annex performance comment
Estimate；
Modifying factor computing module 2, for the result assessed according to the key property and Chemical Apparatus Importance Classification, calculates described
The combination property modifying factor of transformer；
Total benchmark state index computing module 3, for according to the combination property modifying factor of the transformer to the transformation
The assessment result of device correspondence mechanical performance, electric property, hot property and annex performance is modified, and obtains the total base of transformer
Quasi- state index；
Strategies of Maintenance management module 4, is ranked up for the total benchmark state index according to the transformer to transformer, and
The transformer paid close attention to is needed according to the result selection of sequence and select corresponding Strategies of Maintenance.
It is the Transformer State Assessment device second embodiment knot of the utilization benchmark state analysis that the present invention is provided referring to Fig. 6
Structure schematic diagram.In the present embodiment, the Transformer State Assessment device analyzed using benchmark state will be described in greater detail
The function of structure and each part.The device equally includes as a upper embodiment：Performance estimation module 1, modifying factor is calculated
Module 2, total benchmark state index computing module 3 and Strategies of Maintenance management module 4.
More specifically, performance estimation module 1 includes：Characteristic quantity acquiring unit 11 and assessment unit 12；
Characteristic quantity acquiring unit 11, for obtaining the transformer key feature amount；The transformer key feature amount bag
Include but be not limited to：Operation the time limit, temperature, humidity, installation site, away from seashore distance, thunder and lightning density, environment species, oil chromatography, directly
Resistance, top-oil temperature, load coefficient, environment temperature；Table 1 is that transformer key feature amount sorts out table.
First assessment unit 12, in the transformer key feature amount according to acquired in the characteristic quantity acquiring unit
The operation time limit, environmental factor, on-Line Monitor Device, accident defect factor, operation factor are commented the key property of transformer
Estimate；Transformer station's important level, substation transformer quantity, voltage class in the transformer key feature amount is to transformation
Importance degree of the device in power network is estimated.
Further, the performance estimation module 1 also includes：
Second assessment unit 13, for the mechanical performance K to transformer1It is estimated, K1=f (K1_1,K1_2_1,K1_2_2,
K1_3,ω1_1,ω1_2,ω1_2_1,ω1_2_2,ω1_3)；Wherein, ω1_1、ω1_2、ω1_3Respectively design calculating, test assessment,
The weight coefficient of post-installation review, three's sum is 1；ω1_2_1、ω1_2_2Respectively short-circuit impedance and winding frequency response weight coefficient,
K1_1The buckling safety factor performance indications of verification, K are calculated for design1_2_1It is impedance voltage result of the test performance indications, K1_2_2
It is winding frequency response test result performance indications, K1_3It is Effect of Short Circuit factor performance indications；
3rd assessment unit 14, for transformer to gas performance K2It is estimated, K2=f (K2_1,K2_2,K2_3,
ω2_1,ω2_2,ω2_3)；Wherein K2_1、K2_2、K2_3With ω2_1、ω2_2、ω2_3Respectively oil dissolved gas, oil and winding
The performance indications of D.C. resistance and its corresponding weight coefficient；K2Span be [0,1]；And its value is bigger, electric property
Better.
4th assessment unit 15, for hot property K3It is estimated；Wherein k
The indication transformer actual motion time limit, FEQAIt is equivalent burn-in value, LnIndication transformer ordinary life, N indication transformers have completely
The operation time limit of data.Its span is 0≤K3≤ 1,0 represents apparatus insulated life termination, and 1 represents that the apparatus insulated life-span is good
It is good, the equipment equivalent to newly putting into operation.
5th assessment unit 16, for annex performance K4It is estimated；K4=f (K4_1,K4_2,K4_3,K4_4,ω4_1,
ω4_2,ω4_3,ω4_4), wherein K4_1,K4_2,K4_3,K4_4With ω4_1,ω4_2,ω4_3,ω4_4The big performance of annex four is represented respectively
Performance indications and weight coefficient.It will be appreciated by persons skilled in the art that its specific appraisal procedure as shown in figure 3, other
The specific method of performance indications is similar.
Modifying factor computing module 2 includes：The computing unit 22 of coordinate system unit 21 and first.
Coordinate system unit 21, for setting up δ-γ coordinate systems and reference line l0；The γ is the key property of transformation, and δ is
Chemical Apparatus Importance Classification；Reference line l0Equation be：X+y=0；
First computing unit 22, for the modifying factor F of calculating transformer；Modifying factor by key property assessment result and
Chemical Apparatus Importance Classification assessment result builds two-dimentional risk model and obtains, not only can be to the comprehensive of equipment below by modifying factor
Can be modified, while can also be sorted according to the size of modifying factor, picking out the larger equipment of modifying factor carries out emphasis pass
Note.Coordinates of the transformer A in δ-γ coordinate systems is (δA, γA), wherein 0≤δA≤1,0≤γA≤ 1, then transformer A repair
Positive divisor F is the point (δA, γA) arrive reference line l0Distance,It is after normalizationModifying factor F is bigger, then it represents that equipment should be subject to more passes in day-to-day operation
Note.
Total benchmark state index computing module 3 includes：The computing unit 32 of data capture unit 31 and second.
Data capture unit 31, combination property modifying factor, transformer correspondence machine for obtaining the transformer
The assessment result of tool performance, electric property, hot property and annex performance；
Second computing unit 32, for the combination property modifying factor according to the transformer to transformer correspondence machine
The assessment result of tool performance, electric property, hot property and annex performance is modified, and obtains the total benchmark state index of transformer
BI；BI=F*f (BIfactor* ω)=F* (BIfactor, W), wherein, F is modifying factor, BIfactor=(K1,K2,…,K4) it is each
Divide performance indications vector, W=(ω1,ω2,…,ω4) it is corresponding weight vectors.BI is bigger for equipment overall performance index, shows to set
Standby performance is better, and equipment state is more healthy.
Strategies of Maintenance management module 4, is ranked up for the total benchmark state index according to the transformer to transformer, and
The transformer paid close attention to is needed according to the result selection of sequence and select corresponding Strategies of Maintenance.Equipment overall performance index BI gets over
It is small, show that the performance of correspondence transformer is poorer, equipment state is unhealthy, and out of order probability is higher, is needed for this equipment
Strengthen maintenance and the density maked an inspection tour.
The Transformer State Assessment device of utilization benchmark state provided by the present invention analysis taken into full account design, manufacture,
The parameter informations such as experiment, environment, operation, record of examination, power network, realize the preferred of equipment benchmark state analysis of key characteristic quantity,
And difference analysis have been carried out to it according to the difference of voltage class, the operation time limit and Chemical Apparatus Importance Classification；Have studied influence simultaneously
Ageing equipment, equipment intensity, the various factors of grid strength, and corresponding correlation model is established respectively.The present invention is in synthesis
Consider ageing equipment, equipment intensity, grid strength, set up apparatus assembly and overall benchmark state analysis model, the state of improve is commented
The accuracy and reliability of result are estimated, for O＆M decision-making provides strong support and guidance.
One of ordinary skill in the art will appreciate that all or part of flow in realizing above-described embodiment method, can be
The hardware of correlation is instructed to complete by computer program, described program can be stored in a computer read/write memory medium
In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
Specific implementation of the invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should be all considered as belonging to of the invention
Protection domain.
Claims (8)
1. the Transformer condition evaluation that a kind of utilization benchmark state is analyzed, it is characterised in that including：
According to transformer key feature amount, key property and Chemical Apparatus Importance Classification assessment are carried out to transformer；And to the transformation
Device carries out mechanical property evaluation, electric property assessment, hot property assessment and annex Performance Evaluation；
According to the result that the key property and Chemical Apparatus Importance Classification are assessed, the combination property modifying factor of the transformer is calculated；
Combination property modifying factor according to the transformer is to transformer correspondence mechanical performance, electric property, hot property
Assessment result with annex performance is modified, and obtains the total benchmark state index of transformer；
Total benchmark state index according to the transformer is ranked up to transformer, and determines to need emphasis according to the result for sorting
The transformer of concern and corresponding Strategies of Maintenance；
Wherein, the result assessed according to the key property and Chemical Apparatus Importance Classification, calculates the combination property of the transformer
Modifying factor, including：
γ as the key property of transformation is set, δ is Chemical Apparatus Importance Classification；Then coordinates of the transformer A in δ-γ coordinate systems is (δA,
γA), wherein 0≤δA≤1,0≤γAThe modifying factor F of≤1, transformer A is the point (δA, γA) arrive reference line l0Distance,Wherein described reference line l0Equation be：X+y=0；Wherein F (A) is the modifying factor letter of transformer
Number.
2. as claimed in claim 1 using the Transformer condition evaluation of benchmark state analysis, it is characterised in that the transformation
Device key feature amount is included but is not limited to：Operation the time limit, temperature, humidity, installation site, away from seashore distance, thunder and lightning density, environment
Species, oil chromatography, straight resistance, top-oil temperature, load coefficient, environment temperature；
The key property and Chemical Apparatus Importance Classification assessment of being carried out to transformer includes：According in the transformer key feature amount
The operation time limit, environmental factor, on-Line Monitor Device, accident defect factor, operation factor are commented the key property of transformer
Estimate；Transformer station's important level, substation transformer quantity, voltage class in the transformer key feature amount is to transformation
Importance degree of the device in power network is estimated.
3. as claimed in claim 2 using the Transformer condition evaluation of benchmark state analysis, it is characterised in that described to institute
State transformer carry out mechanical property evaluation, electric property assessment, hot property assessment and annex Performance Evaluation include：
To mechanical performance K1It is estimated, K1=f (K1_1,K1_2_1,K1_2_2,K1_3,ω1_1,ω1_2,ω1_2_1,ω1_2_2,ω1_3)；
Wherein, ω1_1、ω1_2、ω1_3Calculating, test assessment, the weight coefficient of post-installation review are respectively designed, three's sum is 1；
ω1_2_1、ω1_2_2Respectively short-circuit impedance and winding frequency response weight coefficient, K1_1The buckling safety factor of verification is calculated for design
Performance indications, K1_2_1It is impedance voltage result of the test performance indications, K1_2_2It is winding frequency response test result performance indications,
K1_3It is Effect of Short Circuit factor performance indications；
To electric property K2It is estimated, K2=f (K2_1,K2_2,K2_3,ω2_1,ω2_2,ω2_3)；Wherein K2_1、K2_2、K2_3With
ω2_1、ω2_2、ω2_3Respectively oil dissolved gas, oil and winding D.C. resistance performance indications and its corresponding weight system
Number；K2Span be [0,1]；
To hot property K3It is estimated；The wherein k indication transformers actual motion time limit,
FEQAIt is equivalent burn-in value, LnIndication transformer ordinary life, N indication transformers have the operation time limit of partial data；
To annex performance K4It is estimated；K4=f (K4_1,K4_2,K4_3,K4_4,ω4_1,ω4_2,ω4_3,ω4_4), wherein K4_1,
K4_2,K4_3,K4_4With ω4_1,ω4_2,ω4_3,ω4_4The performance indications and weight coefficient of the big performance of annex four are represented respectively, it is described
The big performance of annex four includes sleeve pipe, shunting switch, cooling system, non-ionizing energy loss performance.
4. as claimed in claim 3 using the Transformer condition evaluation of benchmark state analysis, it is characterised in that the basis
The combination property modifying factor of the transformer is to transformer correspondence mechanical performance, electric property, hot property and annex
The assessment result of energy is modified, and obtaining the total benchmark state index of transformer includes：
The total benchmark state index BI=F*f (BI of transformerfactor* ω)=F* (BIfactor, W), wherein, F is modifying factor,
BIfactor=(K1,K2,…,K4) it is each point of performance indications vector, W=(ω1,ω2,…,ω4) it is corresponding weight vectors.
5. the Transformer State Assessment device that a kind of utilization benchmark state is analyzed, it is characterised in that including：
Performance estimation module, for according to transformer key feature amount, carrying out key property to transformer and Chemical Apparatus Importance Classification being commented
Estimate；And mechanical property evaluation, electric property assessment, hot property assessment and annex Performance Evaluation are carried out to the transformer；
Modifying factor computing module, for the result assessed according to the key property and Chemical Apparatus Importance Classification, calculates the transformation
The combination property modifying factor of device；
Total benchmark state index computing module, for the combination property modifying factor according to the transformer to transformer correspondence
The assessment result of mechanical performance, electric property, hot property and annex performance is modified, and obtains the total benchmark state of transformer and refers to
Mark；
Strategies of Maintenance management module, is ranked up for the total benchmark state index according to the transformer to transformer, and foundation
The result selection of sequence needs the transformer paid close attention to and selects corresponding Strategies of Maintenance；
Wherein, the modifying factor computing module includes：
Coordinate system unit, for setting up δ-γ coordinate systems and reference line l0；The γ is the key property of transformation, and δ is that equipment is important
Degree；Reference line l0Equation be：X+y=0；
First computing unit, for the modifying factor F of calculating transformer；Coordinates of the transformer A in δ-γ coordinate systems is (δA,
γA), wherein 0≤δA≤1,0≤γA≤ 1, then the modifying factor F of transformer A is the point (δA, γA) arrive reference line l0Distance,Wherein F (A) is the modifying factor function of transformer.
6. as claimed in claim 5 using the Transformer State Assessment device of benchmark state analysis, it is characterised in that Performance Evaluation
Module includes：Characteristic quantity acquiring unit and assessment unit；
Characteristic quantity acquiring unit, for obtaining the transformer key feature amount；The transformer key feature amount include but not
It is limited to：The operation time limit, temperature, humidity, installation site, away from seashore distance, thunder and lightning density, environment species, oil chromatography, straight resistance, push up
Layer oil temperature, load coefficient, environment temperature；
First assessment unit, for the operation year in the transformer key feature amount according to acquired in the characteristic quantity acquiring unit
Limit, environmental factor, on-Line Monitor Device, accident defect factor, operation factor are estimated to the key property of transformer；According to
Transformer station's important level, substation transformer quantity, voltage class in the transformer key feature amount are to transformer in electricity
Importance degree in net is estimated.
7. as claimed in claim 6 using the Transformer State Assessment device of benchmark state analysis, it is characterised in that the performance
Evaluation module also includes：
Second assessment unit, for the mechanical performance K to transformer1It is estimated, K1=f (K1_1,K1_2_1,K1_2_2,K1_3,
ω1_1,ω1_2,ω1_2_1,ω1_2_2,ω1_3)；Wherein, ω1_1、ω1_2、ω1_3Respectively design calculating, test assessment, operation
The weight coefficient of examination, three's sum is 1；ω1_2_1、ω1_2_2Respectively short-circuit impedance and winding frequency response weight coefficient, K1_1For
Design calculates the buckling safety factor performance indications of verification, K1_2_1It is impedance voltage result of the test performance indications, K1_2_2It is winding
Frequency response test result performance indications, K1_3It is Effect of Short Circuit factor performance indications；
3rd assessment unit, for transformer to gas performance K2It is estimated, K2=f (K2_1,K2_2,K2_3,ω2_1,ω2_2,
ω2_3)；Wherein K2_1、K2_2、K2_3With ω2_1、ω2_2、ω2_3Respectively oil dissolved gas, oil and winding D.C. resistance
Performance indications and its corresponding weight coefficient；K2Span be [0,1]；
4th assessment unit, for hot property K3It is estimated；Wherein k represents change
The depressor actual motion time limit, FEQAIt is equivalent burn-in value, LnIndication transformer ordinary life, N indication transformers have partial data
The operation time limit；
5th assessment unit, for annex performance K4It is estimated；K4=f (K4_1,K4_2,K4_3,K4_4,ω4_1,ω4_2,
ω4_3,ω4_4), wherein K4_1,K4_2,K4_3,K4_4With ω4_1,ω4_2,ω4_3,ω4_4The performance of the big performance of annex four is represented respectively
Index and weight coefficient, the big performance of the annex four include sleeve pipe, shunting switch, cooling system, non-ionizing energy loss performance.
8. as claimed in claim 7 using the Transformer State Assessment device of benchmark state analysis, it is characterised in that total base
Quasi- state index computing module includes：
Data capture unit, for obtain the transformer combination property modifying factor, the transformer correspondence mechanical performance,
The assessment result of electric property, hot property and annex performance；
Second computing unit, for the combination property modifying factor according to the transformer to transformer correspondence mechanicalness
The assessment result of energy, electric property, hot property and annex performance is modified, and obtains the total benchmark state index BI of transformer；
BI=F*f (BIfactor* ω)=F* (BIfactor, W), wherein, F is modifying factor, BIfactor=(K1,K2,…,K4) it is each point
Performance indications vector, W=(ω1,ω2,…,ω4) it is corresponding weight vectors.
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| CN104809579B (en) * | 2015-04-30 | 2018-07-24 | 广西电网有限责任公司电力科学研究院 | A kind of division methods of transformer importance |
| CN104915894A (en) * | 2015-06-15 | 2015-09-16 | 广东电网有限责任公司佛山供电局 | Metering automatic terminal operation risk early warning system |
| CN105334453A (en) * | 2015-07-22 | 2016-02-17 | 深圳供电局有限公司 | SF (sulfur hexafluoride)6High-voltage circuit breaker state evaluation method and device |
| CN106055888B (en) * | 2016-05-27 | 2018-09-14 | 国网上海市电力公司 | Transformer top-oil temperature prediction technique based on predicted error amendment and device |
| CN106501641B (en) * | 2016-10-20 | 2019-04-30 | 云南电网有限责任公司电力科学研究院 | A kind of transformer quality state appraisal procedure |
| CN109188082A (en) * | 2018-08-14 | 2019-01-11 | 国网陕西省电力公司电力科学研究院 | A kind of Transformer condition evaluation based on BP neural network |
| CN110472820A (en) * | 2019-07-04 | 2019-11-19 | 广东电网有限责任公司 | A kind of analysis calculation method of distribution transforming health degree |
| CN110608767A (en) * | 2019-08-13 | 2019-12-24 | 大唐水电科学技术研究院有限公司 | Transformer state evaluation method and device by using reference state analysis |
| CN115271285A (en) * | 2021-04-30 | 2022-11-01 | 三一汽车制造有限公司 | Method and device for evaluating working performance of pumping machine and electronic equipment |
| CN114818387B (en) * | 2022-06-20 | 2023-06-13 | 浙江大学杭州国际科创中心 | Performance evaluation method of nonlinear conductive material |
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Effective date of registration: 20171215 Address after: Luohu District Shenzhen Shennan Road 518000 No. 4020 Guangdong provincial power dispatching center building Patentee after: Shenzhen Power Supply Co.,Ltd. Address before: Luohu District Shenzhen Shennan Road 518000 No. 4020 Guangdong provincial power dispatching center building Co-patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee before: Shenzhen Power Supply Co.,Ltd. |