CN106199234A - A kind of transformator residual life detection method based on health index - Google Patents

Abstract

The invention discloses a kind of transformator residual life detection method based on health index, step comprises determining that the aging coefficient of transformator and initial main health level index time of putting into operation calculates main health level index, detect the carbon carrier of oxygen content in transformator and determine the health index that carbon carrier of oxygen content reflects, detection furfural gas content also determines the health index that furfural gas content reflects, then COMPREHENSIVE CALCULATING paper insulation running status health index, the oil of detection transformator dissolves carburetted hydrogen gas content and determines the health index dissolving the reflection of carburetted hydrogen gas content in oil, detect the oil quality of transformator and determine the health index that oil quality reflects, the comprehensive health index of calculating transformer, calculating transformer passes through the revised final health index of defect correction coefficient.The present invention can take into full account the transformer state information of current wide variety, make full use of transformer state data, again can the complexity of effective Controlling model, there is the advantage that testing result accuracy is high.

Description

A kind of transformator residual life detection method based on health index

Technical field

The present invention relates to transformator residual life detection technique, be specifically related to a kind of transformator based on health index residue Life detecting method.

Background technology

Power transformer is the most important equipment of power system, and its operation conditions is directly connected to the safety fortune of system OK；It is energy conversion, the core of transmission in electrical network, is in extremely important status in power system.The most electric according to the world The net meeting statistics to Countries power transmission and transforming equipment service life, current transformer equipment average life is 40～45 Year.Due to practical operation situation and the difference of load variations, these transformator real surplus life-span difference are bigger.Some shape that insulate Condition is good, possesses the ability continuing to be on active service；Some degree of aging is serious, needs safeguarded in time or change.In order to avoid blind Mesh is changed and is brought huge economic loss, and without according to continuing to run with the potential safety hazard caused, it is necessary to utilize modern technologies With analysis means, the residual life of in-service transformator is estimated, it is achieved transformator is under guaranteeing safe operation reliability premise It is utilized to be worth to greatest extent.Power industry and each scientific research institution are in transformer insulation state diagnostic techniques and appraisal procedure at present Aspect has carried out substantial amounts of research, defines a lot of effective measuring technology, such as: bran in oil chromatography, water content in oil content, oil Aldehyde, shelf depreciation technology, medium frequency response technology etc., every kind of method of testing all has relatively for a certain class insulation defect Good effect, but single method of testing or test result can not accurately reflect the state of insulation of transformator, currently also do not have There are a kind of energy all research techniques of effective integration and the Transformer Insulation Aging of test data and lifetime estimation method.Therefore, as What is selected to accurately reflect the method for testing of the state of insulation of transformator, and assess quantity of state that various method of testing obtains it Between weight relationship to accurately reflect the state of insulation of transformator, had become as a key technical problem urgently to be resolved hurrily.

Summary of the invention

The technical problem to be solved in the present invention: for the problems referred to above of prior art, it is provided that one can take into full account mesh The transformer state information of front wide variety, make full use of transformer state data, again can the complexity of effective Controlling model, The transformator residual life detection method based on health index that testing result accuracy is high.

In order to solve above-mentioned technical problem, the technical solution used in the present invention is:

A kind of transformator residual life detection method based on health index, step includes:

1) determining the aging coefficient B of transformator, aging coefficient B and initial main health level index according to transformator put into operation Time calculates main health level index HI_m；

2) according to the carbon carrier of oxygen content in transformator, the carbon carrier of oxygen content in detection transformator, determines that carbon carrier of oxygen contains The health index HI of amount reflection_C,O, detect the furfural gas content in transformator, true according to the furfural gas content in transformator Determine the health index HI of furfural gas content reflection_fur, according to the health index HI of carbon carrier of oxygen content reflection_C,O, furfural gas The health index HI of content reflection_furCOMPREHENSIVE CALCULATING paper insulation running status health index HI_iso；

3) oil of detection transformator dissolves carburetted hydrogen gas content, determine dissolving carbon in oil according to oil dissolves carburetted hydrogen gas content The health index HI of hydrogen content reflection_C,H；

4) detect the oil quality of transformator, determine, according to the oil quality of transformator, the health index HI that oil quality reflects_oil；

5) for main health level index HI_m, paper insulation running status health index HI_iso, oil dissolves carburetted hydrogen gas content The health index HI of reflection_C,H, oil quality reflection health index HI_oilFour kinds of health index, use function representation shown in formula (5) The comprehensive health index HI of formula calculating transformer_com；

${\mathrm{HI}}_{com}=\underset{i=1}{\overset{4}{\Σ}}{\mathrm{\ω}}_i{\mathrm{HI}}_{\left(i\right)}---\left(5\right)$

In formula (5), HI_comThe comprehensive health index of indication transformer, ω_iRepresent the weight of i-th kind of health index, HI_(i) Represent the value of i-th kind of health index；

6) function expression calculating transformer shown in formula (6) is used to be referred to by the revised final health of defect correction coefficient Number HI；

HI=f × HI_com (6)

In formula (6), the final health index of HI indication transformer, the defect correction coefficient of f indication transformer, HI_comRepresent The comprehensive health index of transformator；

7) the residual life EOL of function expression calculating transformer shown in formula (7) is used；

EOL=ln7/HI/B (7)

In formula (7), the residual life of EOL indication transformer, the final health index of HI indication transformer, B represents transformation The aging coefficient of device.

Preferably, described step 1) in determine transformator aging coefficient B function expression such as formula (1-1) shown in；

B=(ln6.5-ln0.5)/(T₂-T₁) (1-1)

In formula (1-1), the aging coefficient of B indication transformer, T₁The time that indication transformer is corresponding when being brand-new equipment, T₂ The target time of indication transformer residual life.

Preferably, described step 1) in determine transformator aging coefficient B function expression such as formula (1-2) shown in；

B=(ln6.5/0.5)/T '_exp (1-2)

In formula (1-2), the aging coefficient of B indication transformer, T '_expThe amendment design of indication transformer runs the time limit, and becomes The amendment design of depressor runs shown in the calculating function expression such as formula (1-3) of the time limit；

${T^{\′}}_{\exp }=\frac{T_{\exp }}{f_L\×f_E}---(1-3)$

In formula (1-3), T '_expThe amendment design of indication transformer runs the time limit, T_expThe design fortune of dispatching from the factory of indication transformer The row time limit, f_LFor the load coefficient of transformator, f_EEnvironmental coefficient for transformator.

Preferably, described step 1) the main health level index HI of middle calculating_mFunction expression such as formula (1-4) shown in；

${\mathrm{HI}}_m={\mathrm{HI}}_0\×e^{B\×(T_2-T_1)}---(1-4)$

In formula (1-4), HI_mRepresent main health level index, HI₀Indication transformer is corresponding being initially good for when being brand-new equipment Health level index, the aging coefficient of B indication transformer, T₁The time that indication transformer is corresponding when being brand-new equipment, T₂Represent transformation The target time of device residual life.

Preferably, described step 2) detailed step include:

2.1) the CO content in detection transformator, CO₂Content, CO and CO₂Containing of mixture content totally three kinds of carbon carrier of oxygen parameters Amount, inquires about the carbon carrier of oxygen calculating parameter list preset and obtains the calculating ginseng of correspondence according to the content of each carbon carrier of oxygen parameter Number, calculates, according to function expression shown in formula (2-1), the carbon oxygen index deterioration factor that each carbon carrier of oxygen parameter is corresponding, according to The weight preset, by the carbon oxygen index deterioration factor corresponding for all carbon carrier of oxygen parameters, uses formula (2-2) comprehensively to obtain carbon oxygen The health index HI of body burden reflection_C,O；

$\left\{\begin{array}{cc}{F}_{C,O}\left(i\right)={\mathrm{ax}}_i+b& x_i<=c\\ F_{C,O}\left(i\right)=10& x_i>c\end{array}\right.---(2-1)$

In formula (2-1), F_C,OI () represents the carbon oxygen index deterioration factor that i-th kind of carbon carrier of oxygen parameter is corresponding, a and b is for looking into Ask the parameter list that calculates preset and obtain i-th kind of calculating parameter corresponding to carbon carrier of oxygen parameter, x_iRepresent i-th kind of carbon carrier of oxygen parameter Content, c represents the critical contents that i-th kind of carbon carrier of oxygen parameter is corresponding；

${\mathrm{HI}}_{C,O}=\underset{i=1}{\overset{3}{\&Sigma;}}{\mathrm{\&omega;}}_i\&times;F_{C,O}\left(i\right)---(2-2)$

In formula (2-2), HI_C,ORepresent the health index of carbon carrier of oxygen content reflection, ω_iRepresent i-th kind of carbon carrier of oxygen parameter Corresponding weight, F_C,OI () represents the carbon oxygen index deterioration factor that i-th kind of carbon carrier of oxygen parameter is corresponding；

2.2) furfural content in detection transformator, calculates furfural gas according to the furfural content in transformator and formula (2-3) The health index HI of body burden reflection_fur；

HI_fur=2.33 × (C_fur)^0.68 (2-3)

In formula (2-3), HI_furRepresent the health index of furfural gas content reflection, C_furFurfural in indication transformer contains Amount；

2.3) according to the health index HI of carbon carrier of oxygen content reflection_C,O, furfural gas content reflection health index HI_fur, use formula (2-4) COMPREHENSIVE CALCULATING paper insulation running status health index HI_iso；

HI_iso=ω₁HI_C,O+ω₂HI_fur (2-4)

In formula (2-4), ω₁Represent the health index HI of carbon carrier of oxygen content reflection_C,OCorresponding weight, HI_C,ORepresent carbon The health index of carrier of oxygen content reflection, ω₂Represent the health index HI of furfural gas content reflection_furCorresponding weight, HI_fur Represent the health index of furfural gas content reflection.

Preferably, described step 3) detailed step include:

3.1) H in detection transformator₂Content, CH₄Content, C₂H₆Content, C₂H₄Content, C₂H₂Content totally five kinds of carburetted hydrogen gas The content of body parameter, inquires about the hydrocarbon gas calculating parameter list preset and obtains correspondence according to the content of each hydrocarbon gas parameter Calculating parameter；

3.2) calculate, according to function expression shown in formula (3-1), the hydrocarbon index deterioration that each hydrocarbon gas parameter is corresponding The factor；

$\left\{\begin{array}{cc}{F}_{C,H}\left(i\right)={\mathrm{ax}}_i+b& x_i<=c\\ F_{C,H}\left(i\right)=10& x_i>c\end{array}\right.---(3-1)$

In formula (3-1), F_C,HI () represents the hydrocarbon index deterioration factor that i-th kind of hydrocarbon gas parameter is corresponding, a and b is for looking into Asking the parameter list that calculates preset and obtain i-th kind of calculating parameter corresponding to hydrocarbon gas parameter, c represents i-th kind of hydrocarbon gas parameter Corresponding critical contents, x_iRepresent the content of i-th kind of hydrocarbon gas parameter；

3.3) according to the weight preset, hydrocarbon index deterioration factor integration corresponding for all hydrocarbon gas parameters is obtained oil The health index HI of middle dissolving carburetted hydrogen gas content reflection_C,H；

${\mathrm{HI}}_{C,H}=\underset{i=1}{\overset{5}{\&Sigma;}}{\mathrm{\&omega;}}_i{F}_{C,H}\left(i\right)---(3-2)$

In formula (2-2), HI_C,HRepresent the health index dissolving the reflection of carburetted hydrogen gas content in oil, ω_iRepresent i-th kind of carburetted hydrogen gas The weight that body parameter is corresponding, F_C,HI () represents the hydrocarbon index deterioration factor that i-th kind of hydrocarbon gas parameter is corresponding.

Preferably, described step 4) detailed step include:

4.1) micro-water content of oil of detection transformator, acid number, dielectric loss, breakdown voltage totally four kinds of oil quality parameters Value；

4.2) micro-water content, acid number, dielectric loss, four kinds of oil qualities of breakdown voltage are determined according to the electric pressure of transformator The segmentation of the oil quality factor score of parameter calculates function, calculates function according to segmentation and calculates micro-water content, acid number, medium damage Consumption, the oil quality factor score of four kinds of oil quality parameters of breakdown voltage；

4.3) the health index HI of oil quality reflection is calculated according to formula (4-1) described function expression_oil；

${\mathrm{HI}}_{oil}=\underset{i=1}{\overset{4}{\&Sigma;}}{\mathrm{\&omega;}}_i\&times;F_{oil}\left(i\right)---(4-1)$

In formula (4-1), HI_oilRepresent the health index of oil quality reflection, ω_iRepresent the power that i-th kind of oil quality parameter is corresponding Weight, F_oilI () represents the oil quality factor score that i-th kind of oil quality parameter is corresponding.

Preferably, described step 4.2) according to the electric pressure of transformator determine micro-water content, acid number, dielectric loss, When the segmentation of the oil quality factor score of four kinds of oil quality parameters of breakdown voltage calculates function, oil quality corresponding to dielectric loss because of The segmentation of sub-score calculates shown in function such as formula (4-2)；

$F_{oil}\left(\mathrm{\&delta;}\right)=\left\{\begin{array}{cc}0& x\&le;0.05\\ 20x-1& x\&Element;(0.05,0.15\&rsqb;\\ 5.714x+1.143& x\&Element;(0.15,0.5\&rsqb;\\ 4x+2& x\&Element;(0.5,1.5\&rsqb;\\ 10& x>1.5\end{array}\right.---(4-2)$

In formula (4-2), F_oil(δ) representing the oil quality factor score that dielectric loss is corresponding, x represents the value of dielectric loss；

When the electric pressure of transformator is less than 69kV, the segmentation of the oil quality factor score that micro-water content is corresponding calculates letter Number is as shown in formula (4-3), and the segmentation of the oil quality factor score that acid number is corresponding calculates shown in function such as formula (4-4), breakdown voltage The segmentation of corresponding oil quality factor score calculates shown in function such as formula (4-5)；

$F_{oil}\left(H_{2}O\right)=\left\{\begin{array}{cc}0& x\&le;20\\ 0.2x-4& x\&Element;(20,30\&rsqb;\\ 0.4x-10& x\&Element;(30,45\&rsqb;\\ 10& x>45\end{array}\right.---(4-3)$

In formula (4-3), F_oil(H₂O) representing the oil quality factor score that micro-water content is corresponding, x represents the value of micro-water content；

$F_{oil}\left(acid\right)=\left\{\begin{array}{cc}0& x\&le;0.015\\ 23.53x-0.353& x\&Element;(0.015,0.1\&rsqb;\\ 20x& x\&Element;(0.1,0.2\&rsqb;\\ 40x-4& x\&Element;(0.2,0.3\&rsqb;\\ 10& x>0.3\end{array}\right.---(4-4)$

In formula (4-4), F_oil(acid) representing the oil quality factor score that acid number is corresponding, x represents acid number；

$F_{oil}\left(V\right)=\left\{\begin{array}{cc}10& x\&le;30\\ -0.4x+20& x\&Element;(30,40\&rsqb;\\ -0.667x+30.68& x\&Element;(40,43\&rsqb;\\ -x+45& x\&Element;(43,45\&rsqb;\\ 0& x>45\end{array}\right.---(4-5)$

In formula (4-5), F_oil(V) representing the oil quality factor score that breakdown voltage is corresponding, x represents the value of breakdown voltage；

When the electric pressure of transformator is more than 69kV and is less than 230kV, the oil quality factor score that micro-water content is corresponding Segmentation calculate shown in function such as formula (4-6), the segmentation of the oil quality factor score that acid number is corresponding calculates function such as formula (4-7) institute Showing, the segmentation of the oil quality factor score that breakdown voltage is corresponding calculates shown in function such as formula (4-8)；

$F_{oil}\left(H_{2}O\right)=\left\{\begin{array}{cc}0& x\&le;10\\ 0.2x-2& x\&Element;(10,20\&rsqb;\\ 0.4x-6& x\&Element;(20,35\&rsqb;\\ 10& x>35\end{array}\right.---(4-6)$

In formula (4-6), F_oil(H₂O) representing the oil quality factor score that micro-water content is corresponding, x represents the value of micro-water content；

$F_{oil}\left(acid\right)=\left\{\begin{array}{cc}0& x\&le;0.015\\ 23.53x-0.353& x\&Element;(0.015,0.1\&rsqb;\\ 40x-2& x\&Element;(0.1,0.25\&rsqb;\\ 10& x>0.25\end{array}\right.---(4-7)$

In formula (4-7), F_oil(acid) representing the oil quality factor score that acid number is corresponding, x represents acid number；

$F_{oil}\left(V\right)=\left\{\begin{array}{cc}10& x\&le;35\\ -0.4x+22& x\&Element;(35,40\&rsqb;\\ -0.286x+17.44& x\&Element;(40,47\&rsqb;\\ -0.667x+35.35& x\&Element;(47,50\&rsqb;\\ -x+52& x\&Element;(50,52\&rsqb;\\ 0& x>52\end{array}\right.---(4-8)$

In formula (4-8), F_oil(V) representing the oil quality factor score that breakdown voltage is corresponding, x represents the value of breakdown voltage；

When the electric pressure of transformator is more than 230kV, the segmentation of the oil quality factor score that micro-water content is corresponding calculates Shown in function such as formula (4-9), the segmentation of the oil quality factor score that acid number is corresponding calculates shown in function such as formula (4-10), breakdown potential The segmentation of the oil quality factor score that pressure is corresponding calculates shown in function such as formula (4-11)；

$F_{oil}\left(H_{2}O\right)=\left\{\begin{array}{cc}0& x\&le;10\\ 0.4x-4& x\&Element;(10,30\&rsqb;\\ 10& x>30\end{array}\right.---(4-9)$

In formula (4-9), F_oil(H₂O) representing the oil quality factor score that micro-water content is corresponding, x represents the value of micro-water content；

$F_{oil}\left(acid\right)=\left\{\begin{array}{cc}0& \&le;0.015\\ 57.14x-0.857& x\&Element;(0.015,0.05\&rsqb;\\ 40x& x\&Element;(0.05,0.2\&rsqb;\\ 10& x>0.2\end{array}\right.---(4-10)$

In formula (4-10), F_oil(acid) representing the oil quality factor score that acid number is corresponding, x represents acid number；

$F_{oil}\left(V\right)=\left\{\begin{array}{cc}10& x\&le;40\\ -0.4x+24& x\&Element;(40,60\&rsqb;\\ 0& x>60\end{array}\right.---(4-11)$

In formula (4-11), F_oil(V) representing the oil quality factor score that breakdown voltage is corresponding, x represents the value of breakdown voltage.

Preferably, described step 6) in the determination step of defect correction coefficient f of transformator as follows: first by transformator Defect is categorized as general defect, major defect and urgent defect, and is general defect, major defect and urgent defect given defect Radix, the defect radix that the number of times of general defect is multiplied by general defect is multiplied by the defect base of major defect plus major defect Number, adds urgent defect and is multiplied by the defect radix of urgent defect and obtains the value of defect rank, inquire about according to the value of defect rank The defect rank coefficient table preset, obtains the defect correction coefficient f of transformator.

Present invention transformator based on health index residual life detection method has an advantage that

1, the present invention according to the aging coefficient of transformator, initial main health level index put into operation the time calculate main health level Index HI_m, detect the carbon carrier of oxygen content in transformator and furfural gas content and COMPREHENSIVE CALCULATING paper insulation running status be healthy Index HI_iso, the oil of detection transformator dissolves carburetted hydrogen gas content and determines the health index dissolving the reflection of carburetted hydrogen gas content in oil HI_C,H, the oil quality of detection transformator, determine, according to the oil quality of transformator, the health index HI that oil quality reflects_oil, at this base Main health level index HI is combined on plinth_m, paper insulation running status health index HI_iso, oil dissolves the reflection of carburetted hydrogen gas content Health index HI_C,H, oil quality reflection health index HI_oilThe comprehensive health of the weight calculation transformator of four kinds of health index refers to Number HI_com, then combine final health index HI and the residue of transformator of the defect correction coefficient calculations transformator of transformator successively Life-span EOL, the present invention takes full advantage of transformer insulated relevant each status data, and result can fully reflect the insulation of transformator State, can take into full account the transformer state information of current wide variety, make full use of transformer state data, again can be effective The complexity of Controlling model, testing result accuracy is high.

2, the present invention puts into operation time, carbon carrier of oxygen content according to the aging coefficient of transformator, initial main health level index And the oil quality of furfural gas content, transformator detects, on the basis of current operating data and historical summary data The present situation of transformator is comprehensively analyzed, foundation can be provided for maintenance decision.

3, the weight of each systematic technical indicator of the present invention is application level analysis on the basis of investigating each index importance Method obtains, and its reasonability and accuracy are the highest, uses the calculation combining weight, can be the most right in conjunction with expert's practice Weight is revised, and flexibility ratio is high, and accuracy of detection has the prospect of raising further.

Accompanying drawing explanation

Fig. 1 is the basic procedure schematic diagram of embodiment of the present invention method.

Detailed description of the invention

Hereafter will be as a example by certain 110kV transformer station #1 transformator, transformator based on health index to the present invention residue longevity Life detection method is further described.This 110kV transformer station #1 transformer voltage grade 110kV, model SFZ8-31500/ 110, projected life is 40 years, and the date of putting into operation is on January 1st, 1985, and equipment operating environment is good, and rate of load condensate is 0.8, zero defects Defect.In the present embodiment, the coherent detection test data in detection transformator is as shown in table 1 below.

Table 1: the coherent detection test data table in transformator.

As it is shown in figure 1, the step of the present embodiment transformator based on health index residual life detection method includes:

1) determining the aging coefficient B of transformator, aging coefficient B and initial main health level index according to transformator put into operation Time calculates main health level index HI_m。

In the present embodiment, step 1) in determine transformator aging coefficient B function expression such as formula (1-1) shown in；

B=(ln6.5-ln0.5)/(T₂-T₁) (1-1)

In formula (1-1), the aging coefficient of B indication transformer, T₁The time that indication transformer is corresponding when being brand-new equipment, T₂ The target time (a certain year in such as this year or future) of indication transformer residual life.

Additionally, determine that the function expression of the aging coefficient B of transformator can also use function representation shown in formula (1-2) Formula；

B=(ln6.5/0.5)/T '_exp (1-2)

In formula (1-2), the aging coefficient of B indication transformer, T '_expThe amendment design of indication transformer runs the time limit, and becomes The amendment design of depressor runs shown in the calculating function expression such as formula (1-3) of the time limit；

${T^{\&prime;}}_{\exp }=\frac{T_{\exp }}{f_L\&times;f_E}---(1-3)$

In formula (1-3), T '_expThe amendment design of indication transformer runs the time limit, T_expThe design fortune of dispatching from the factory of indication transformer The row time limit, f_LFor the load coefficient of transformator, f_EEnvironmental coefficient for transformator.

In the present embodiment, the load coefficient of transformator is as shown in table 2, and the environmental coefficient of transformator is as shown in table 3；

Table 2: the load coefficient table of transformator.

Transformer load rate (%)	Load coefficient (fL)
		0-40	1
40-60	1.05
		60-70	1.1
70-80	1.25
		80-150	1.6

The load coefficient table of transformator shown in table 2 is according to " transformer load directive/guide " and to combine electric power enterprise actual motion Empirically determined, load determines transformator temperature rise level, and long-term heavy-duty service can reduce transformer life.See table 2, to become As a example by depressor rate of load condensate 60%-70%, the load coefficient of its correspondence is 1.1.

Table 3: the environmental coefficient table of transformator.

Table 3 environmental coefficient table is then true according to " power system dirt is distinguished level and selected standard with external insulation " and pertinent literature Fixed, environmental quality affects the aging and corrosion rate of external insulation of transformer and associated external adnexa, thus affects transformer life. Seeing table 3, as a example by bad environments level condition is 3, the environmental coefficient of its correspondence is 1.15.In the present embodiment, transformator sets The meter life-span is 40 years, and equipment operating environment is good, and rate of load condensate is 0.8, and from table 1 and 2, load coefficient is equal to 1.25, environment Coefficient is equal to 1.Substitution formula (1-3) can obtain the amendment design operation time limit of transformator and be equal to 32 years, and aging coefficient B is equal to 0.0802。

In the present embodiment, step 1) the main health level index HI of middle calculating_mFunction expression such as formula (1-4) shown in；

${\mathrm{HI}}_m={\mathrm{HI}}_0\&times;e^{B\&times;(T_2-T_1)}---(1-4)$

In formula (1-4), HI_mRepresent main health level index, HI₀Indication transformer is corresponding being initially good for when being brand-new equipment Health level index, the aging coefficient of B indication transformer, T₁The time that indication transformer is corresponding when being brand-new equipment (generally sets For putting into operation the time), T₂The target time (can be current year, it is possible to for the following time) of indication transformer residual life.This reality Execute in example, the initial health level index HI that transformator is corresponding when being brand-new equipment₀Value is 0.5, final calculated change The main health level index HI of depressor_mIt is 4.223.

2) according to the carbon carrier of oxygen content in transformator, the carbon carrier of oxygen content in detection transformator, determines that carbon carrier of oxygen contains The health index HI of amount reflection_C,O, detect the furfural gas content in transformator, true according to the furfural gas content in transformator Determine the health index HI of furfural gas content reflection_fur, according to the health index HI of carbon carrier of oxygen content reflection_C,O, furfural gas The health index HI of content reflection_furCOMPREHENSIVE CALCULATING paper insulation running status health index HI_iso；

In the present embodiment, step 2) detailed step include:

2.1) the CO content in detection transformator, CO₂Content, CO and CO₂Containing of mixture content totally three kinds of carbon carrier of oxygen parameters Amount (sees table 1, the present embodiment is obtained by oil chromatography test), presets according to the content inquiry of each carbon carrier of oxygen parameter Carbon carrier of oxygen calculates parameter list and obtains the calculating parameter of correspondence, calculates each carbon oxygen according to function expression shown in formula (2-1) The carbon oxygen index deterioration factor that gas parameter is corresponding, according to default weight by carbon oxygen index corresponding for all carbon carrier of oxygen parameters The deterioration factor, uses formula (2-2) comprehensively to obtain the health index HI of carbon carrier of oxygen content reflection_C,O；

$\left\{\begin{array}{cc}{F}_{C,O}\left(i\right)={\mathrm{ax}}_i+b& x_i<=c\\ F_{C,O}\left(i\right)=10& x_i>c\end{array}\right.---(2-1)$

In formula (2-1), F_C,OI () represents the carbon oxygen index deterioration factor that i-th kind of carbon carrier of oxygen parameter is corresponding, a and b is for looking into Ask the parameter list that calculates preset and obtain i-th kind of calculating parameter corresponding to carbon carrier of oxygen parameter, x_iRepresent i-th kind of carbon carrier of oxygen parameter Content, c represents the critical contents that i-th kind of carbon carrier of oxygen parameter is corresponding；

${\mathrm{HI}}_{C,O}=\underset{i=1}{\overset{3}{\&Sigma;}}{\mathrm{\&omega;}}_i\&times;F_{C,O}\left(i\right)---(2-2)$

In formula (2-2), HI_C,ORepresent the health index of carbon carrier of oxygen content reflection, ω_iRepresent i-th kind of carbon carrier of oxygen parameter Corresponding weight, F_C,OI () represents the carbon oxygen index deterioration factor that i-th kind of carbon carrier of oxygen parameter is corresponding；In the present embodiment, CO contains Amount, CO₂Content, CO and CO₂It is 1/3 that the weight of mixture content totally three kinds of carbon carrier of oxygen parameters can unify value, it is also possible to according to fortune Pass through to test and be optimized；

2.2) furfural content in detection transformator (seeing table 1, obtained by oil short form test in the present embodiment), according to Furfural content and formula (2-3) in transformator calculate the health index HI that furfural gas content reflects_fur；

HI_fur=2.33 × (C_fur)^0.68 (2-3)

In formula (2-3), HI_furRepresent the health index of furfural gas content reflection, C_furFurfural in indication transformer contains Amount；

2.3) according to the health index HI of carbon carrier of oxygen content reflection_C,O, furfural gas content reflection health index HI_fur, use formula (2-4) COMPREHENSIVE CALCULATING paper insulation running status health index HI_iso；

HI_iso=ω₁HI_C,O+ω₂HI_fur (2-4)

In formula (2-4), ω₁Represent the health index HI of carbon carrier of oxygen content reflection_C,OCorresponding weight, HI_C,ORepresent carbon The health index of carrier of oxygen content reflection, ω₂Represent the health index HI of furfural gas content reflection_furCorresponding weight, HI_fur Represent the health index of furfural gas content reflection.In the present embodiment, ω₁Value 0.3；ω₂Value 0.7, the carbon oxygen of transformator It is the most as shown in table 4 that body calculates parameter list.

Table 4: the carbon carrier of oxygen of transformator calculates parameter list.

Table 4 is that the relevant criterion according to IEC, IEEE and electric power is for CO, CO₂The setting of some warning values, and tie Conjunction practical application experience determines, CO, CO₂It it is the reflection of transformer solid insulation.See table 4 to understand, the critical content that CO is corresponding Value is 1400 μ L/L, CO₂Corresponding critical contents is 13000 μ L/L, CO+CO₂Corresponding critical contents is 350000 μ L/ L.In the present embodiment, final calculated F_C,O(1)=4.883, F_C,O(2)=10, F_C,O(3)=3.176, it is calculated carbon The health index HI of carrier of oxygen content reflection_C,OIt is 6.020, the health index HI of furfural gas content reflection_furIt is 0.1085, becomes The paper insulation running status health index HI of depressor_isoIt is 1.552.

3) oil of detection transformator dissolves carburetted hydrogen gas content, determine dissolving carbon in oil according to oil dissolves carburetted hydrogen gas content The health index HI of hydrogen content reflection_C,H；

In the present embodiment, step 3) detailed step include:

3.1) H in detection transformator₂Content, CH₄Content, C₂H₆Content, C₂H₄Content, C₂H₂Content totally five kinds of carburetted hydrogen gas The content (seeing table 1, the present embodiment is obtained by oil chromatography test) of body parameter, according to the content of each hydrocarbon gas parameter The hydrocarbon gas that inquiry is preset calculates parameter list and obtains the calculating parameter of correspondence；In the present embodiment, hydrocarbon gas calculates parameter list As shown in table 3；

3.2) calculate, according to function expression shown in formula (3-1), the hydrocarbon index deterioration that each hydrocarbon gas parameter is corresponding The factor；

$\left\{\begin{array}{cc}{F}_{C,H}\left(i\right)={\mathrm{ax}}_i+b& x_i<=c\\ F_{C,H}\left(i\right)=10& x_i>c\end{array}\right.---(3-1)$

In formula (3-1), F_C,HI () represents the hydrocarbon index deterioration factor that i-th kind of hydrocarbon gas parameter is corresponding, a and b is for looking into Asking the parameter list that calculates preset and obtain i-th kind of calculating parameter corresponding to hydrocarbon gas parameter, c represents i-th kind of hydrocarbon gas parameter Corresponding critical contents, x_iRepresent the content of i-th kind of hydrocarbon gas parameter；

3.3) according to the weight preset, hydrocarbon index deterioration factor integration corresponding for all hydrocarbon gas parameters is obtained oil The health index HI of middle dissolving carburetted hydrogen gas content reflection_C,H；

${\mathrm{HI}}_{C,H}=\underset{i=1}{\overset{5}{\&Sigma;}}{\mathrm{\&omega;}}_i{F}_{C,H}\left(i\right)---(3-2)$

In formula (2-2), HI_C,HRepresent the health index dissolving the reflection of carburetted hydrogen gas content in oil, ω_iRepresent i-th kind of carburetted hydrogen gas The weight that body parameter is corresponding, F_C,HI () represents the hydrocarbon index deterioration factor that i-th kind of hydrocarbon gas parameter is corresponding.

In the present embodiment, H₂Content, CH₄Content, C₂H₆Content, C₂H₄Content, C₂H₂Content totally five kinds of hydrocarbon gas parameters pair The weight answered is as shown in table 5.

Table 5: the oil chromatography test predominant gas weight table of transformator.

Ingredient names	Weight
		H2	0.2308
CH4	0.2308
		C2H6	0.0769
C2H4	0.2308
		C2H2	0.2308

Table 5 is the respective weight system determined according to fault severity level representative during the transformator various gas of appearance Number, when the gas that breaks down is to show that inside transformer exists electric discharge or heating, can have a strong impact on transformer life.See table 5 Understand, with C₂H₄As a example by, the weight of its correspondence is 0.2308.

In the present embodiment, it is the most as shown in table 6 that hydrocarbon gas calculates parameter list.

Table 6: the hydrocarbon gas of transformator calculates parameter list.

Table 6 be according in the standard such as IEEE, IEC and GB for hydrogen, acetylene and other hydrocarbon gas content note Meaning value specifies, determines in conjunction with practical application experience.See table 6 to understand, H₂Corresponding critical contents is 500 μ L/L, CH₄Corresponding Critical contents be 125 μ L/L, C₂H₆Corresponding critical contents is 70 μ L/L, C₂H₄Corresponding critical contents is 175 μ L/L, C₂H₂Corresponding critical contents is 35 μ L/L.In the present embodiment, oil dissolves the health index of carburetted hydrogen gas content reflection HI_C,HIt is 0.264.

4) detect the oil quality of transformator, determine, according to the oil quality of transformator, the health index HI that oil quality reflects_oil；

In the present embodiment, step 4) detailed step include:

4.1) micro-water content of oil of detection transformator, acid number, dielectric loss, breakdown voltage totally four kinds of oil quality parameters Value (sees table 1, obtained by oil short form test in the present embodiment)；

4.2) micro-water content, acid number, dielectric loss, four kinds of oil qualities of breakdown voltage are determined according to the electric pressure of transformator The segmentation of the oil quality factor score of parameter calculates function, calculates function according to segmentation and calculates micro-water content, acid number, medium damage Consumption, the oil quality factor score of four kinds of oil quality parameters of breakdown voltage；

4.3) the health index HI of oil quality reflection is calculated according to formula (4-1) described function expression_oil；

${\mathrm{HI}}_{oil}=\underset{i=1}{\overset{4}{\&Sigma;}}{\mathrm{\&omega;}}_i\&times;F_{oil}\left(i\right)---(4-1)$

In formula (4-1), HI_oilRepresent the health index of oil quality reflection, ω_iRepresent the power that i-th kind of oil quality parameter is corresponding Weight, F_oilI () represents the oil quality factor score that i-th kind of oil quality parameter is corresponding.

In the present embodiment, described step 4.2) in determine that micro-water content, acid number, medium damage according to the electric pressure of transformator Consumption, four kinds of oil quality parameters of breakdown voltage oil quality factor score segmentation calculate function time, the oil product that dielectric loss is corresponding The segmentation of prime factor score calculates shown in function such as formula (4-2)；

$F_{oil}\left(\mathrm{\&delta;}\right)=\left\{\begin{array}{cc}0& x\&le;0.05\\ 20x-1& x\&Element;(0.05,0.15\&rsqb;\\ 5.714x+1.143& x\&Element;(0.15,0.5\&rsqb;\\ 4x+2& x\&Element;(0.5,1.5\&rsqb;\\ 10& x>1.5\end{array}\right.---(4-2)$

In formula (4-2), F_oil(δ) representing the oil quality factor score that dielectric loss is corresponding, x represents the value of dielectric loss；

When the electric pressure of transformator is less than 69kV, the segmentation of the oil quality factor score that micro-water content is corresponding calculates letter Number is as shown in formula (4-3), and the segmentation of the oil quality factor score that acid number is corresponding calculates shown in function such as formula (4-4), breakdown voltage The segmentation of corresponding oil quality factor score calculates shown in function such as formula (4-5)；

$F_{oil}\left(H_{2}O\right)=\left\{\begin{array}{cc}0& x\&le;20\\ 0.2x-4& x\&Element;(20,30\&rsqb;\\ 0.4x-10& x\&Element;(30,45\&rsqb;\\ 10& x>45\end{array}\right.---(4-3)$

In formula (4-3), F_oil(H₂O) representing the oil quality factor score that micro-water content is corresponding, x represents the value of micro-water content；

$F_{oil}\left(acid\right)=\left\{\begin{array}{cc}0& x\&le;0.015\\ 23.53x-0.353& x\&Element;(0.015,0.1\&rsqb;\\ 20x& x\&Element;(0.1,0.2\&rsqb;\\ 40x-4& x\&Element;(0.2,0.3\&rsqb;\\ 10& x>0.3\end{array}\right.---(4-4)$

In formula (4-4), F_oil(acid) representing the oil quality factor score that acid number is corresponding, x represents acid number；

$F_{oil}\left(V\right)=\left\{\begin{array}{cc}10& x\&le;30\\ -0.4x+20& x\&Element;(30,40\&rsqb;\\ -0.667x+30.68& x\&Element;(40,43\&rsqb;\\ -x+45& x\&Element;(43,45\&rsqb;\\ 0& x>45\end{array}\right.---(4-5)$

In formula (4-5), F_oil(V) representing the oil quality factor score that breakdown voltage is corresponding, x represents the value of breakdown voltage；

When the electric pressure of transformator is more than 69kV and is less than 230kV, the oil quality factor score that micro-water content is corresponding Segmentation calculate shown in function such as formula (4-6), the segmentation of the oil quality factor score that acid number is corresponding calculates function such as formula (4-7) institute Showing, the segmentation of the oil quality factor score that breakdown voltage is corresponding calculates shown in function such as formula (4-8)；

$F_{oil}\left(H_{2}O\right)=\left\{\begin{array}{cc}0& x\&le;10\\ 0.2x-2& x\&Element;(10,20\&rsqb;\\ 0.4x-6& x\&Element;(20,35\&rsqb;\\ 10& x>35\end{array}\right.---(4-6)$

In formula (4-6), F_oil(H₂O) representing the oil quality factor score that micro-water content is corresponding, x represents the value of micro-water content；

$F_{oil}\left(acid\right)=\left\{\begin{array}{cc}0& x\&le;0.015\\ 23.53x-0.353& x\&Element;(0.015,0.1\&rsqb;\\ 40x-2& x\&Element;(0.1,0.25\&rsqb;\\ 10& x>0.25\end{array}\right.---(4-7)$

In formula (4-7), F_oil(acid) representing the oil quality factor score that acid number is corresponding, x represents acid number；

$F_{oil}\left(V\right)=\left\{\begin{array}{cc}10& x\&le;35\\ -0.4x+22& x\&Element;(35,40\&rsqb;\\ -0.286x+17.44& x\&Element;(40,47\&rsqb;\\ -0.667x+35.35& x\&Element;(47,50\&rsqb;\\ -x+52& x\&Element;(50,52\&rsqb;\\ 0& x>52\end{array}\right.---(4-8)$

In formula (4-8), F_oil(V) representing the oil quality factor score that breakdown voltage is corresponding, x represents the value of breakdown voltage；

When the electric pressure of transformator is more than 230kV, the segmentation of the oil quality factor score that micro-water content is corresponding calculates Shown in function such as formula (4-9), the segmentation of the oil quality factor score that acid number is corresponding calculates shown in function such as formula (4-10), breakdown potential The segmentation of the oil quality factor score that pressure is corresponding calculates shown in function such as formula (4-11)；

$F_{oil}\left(H_{2}O\right)=\left\{\begin{array}{cc}0& x\&le;10\\ 0.4x-4& x\&Element;(10,30\&rsqb;\\ 10& x>30\end{array}\right.---(4-9)$

In formula (4-9), F_oil(H₂O) representing the oil quality factor score that micro-water content is corresponding, x represents the value of micro-water content；

$F_{oil}\left(acid\right)=\left\{\begin{array}{cc}0& \&le;0.015\\ 57.14x-0.857& x\&Element;(0.015,0.05\&rsqb;\\ 40x& x\&Element;(0.05,0.2\&rsqb;\\ 10& x>0.2\end{array}\right.---(4-10)$

In formula (4-10), F_oil(acid) representing the oil quality factor score that acid number is corresponding, x represents acid number；

$F_{oil}\left(V\right)=\left\{\begin{array}{cc}10& x\&le;40\\ -0.4x+24& x\&Element;(40,60\&rsqb;\\ 0& x>60\end{array}\right.---(4-11)$

In formula (4-11), F_oil(V) representing the oil quality factor score that breakdown voltage is corresponding, x represents the value of breakdown voltage.

In the present embodiment, the weighted value tool of micro-water content, acid number, dielectric loss, breakdown voltage totally four kinds of oil quality parameters Body is as shown in table 7.

Table 7: transformator oil tests each factor weight table.

Project name	Weight
		Micro-water content (mg/L)	0.4550
Acid number (mgKOH/g)	0.2627
		Dielectric loss 25 DEG C	0.1411
Breakdown voltage (kV)	0.1411

Table 7 be also according to each parameter in transformer oil each oil parameter shared by significance level, through reality repeatedly The weight coefficient that application sums up, transformer oil is insulant main in transformator.See table 7, as a example by micro-water content, The weight of its correspondence is 0.4550.

In the present embodiment, oil dissolves the health index HI of carburetted hydrogen gas content reflection_C,HIt is 0.264, the most calculated The health index HI of oil quality reflection_oilIt is 1.428.

5) for main health level index HI_m, paper insulation running status health index HI_iso, oil dissolves carburetted hydrogen gas content The health index HI of reflection_C,H, oil quality reflection health index HI_oilFour kinds of health index, use function representation shown in formula (5) The comprehensive health index HI of formula calculating transformer_com；

${\mathrm{HI}}_{com}=\underset{i=1}{\overset{4}{\&Sigma;}}{\mathrm{\&omega;}}_i{\mathrm{HI}}_{\left(i\right)}---\left(5\right)$

In formula (5), HI_comThe comprehensive health index of indication transformer, ω_iRepresent the weight of i-th kind of health index, HI_(i) Represent the value of i-th kind of health index；The present embodiment is by main health level index HI_m, paper insulation running status health index HI_iso, oil dissolves the health index HI of carburetted hydrogen gas content reflection_C,H, oil quality reflection health index HI_oilFour kinds of health refer to Number characterizes transformator health index, main health level index HI_m, paper insulation running status health index HI_iso, oil dissolves The health index HI of carburetted hydrogen gas content reflection_C,H, oil quality reflection health index HI_oilThe weight of four kinds of health index such as table 8 Shown in；

Table 8: the weight table of each health index.

Title	ωiValue
		HIm	0.5695
HIiso	0.2660
		HIC,H	0.0946
HIoil	0.0699

Table 8 is the weight of each health index, and the size of weight reflects each health index shadow to transformer life The size of the degree of sound, is to consider many experimental results and operating experience and binding hierarchy analytic process determines.See table 8, this Main health level index HI in embodiment_mWeight be 0.5695.In the present embodiment, in conjunction with the shown four kinds of health index of table 7 Weight, the comprehensive health index HI of final calculated transformator_comIt is 3.05.

6) function expression calculating transformer shown in formula (6) is used to be referred to by the revised final health of defect correction coefficient Number HI；

HI=f × HI_com (6)

In formula (6), the final health index of HI indication transformer, the defect correction coefficient of f indication transformer, HI_comRepresent The comprehensive health index of transformator；

In the present embodiment, step 6) in the determination step of defect correction coefficient f of transformator as follows: first by transformator Defect is categorized as general defect, major defect and urgent defect, and is general defect, major defect and urgent defect given defect Radix (sees table 1), and the defect radix that the number of times of general defect is multiplied by general defect is multiplied by major defect plus major defect Defect radix, add urgent defect and be multiplied by the defect radix of urgent defect and obtain the value of defect rank, according to defect rank Value inquiry preset defect rank coefficient table, obtain the defect correction coefficient f of transformator.In the present embodiment, for general defect, Major defect and urgent defect given defect radix are respectively 1,2 and 3, transformator defect radix table as shown in Table 9 below.? Eventually, the value of the defect correction coefficient f obtaining transformator according to equivalent coefficient table shown in table 10 is 1.

Table 9: transformator defect radix table:

Defect system	Defect radix
		General defect	1
Major defect	3
		Urgent defect	5

Table 9 defect radix is according to classification for defect in current power system, the most true for calculating defect coefficient institute Fixed defect radix.

Table 10: defect rank coefficient table.

Defect rank	Defect coefficient
		0	1
1-2	1.1
		3-6	1.2
7-11	1.3
		12-22	1.4
Other	1.5

Table 10 is according to substantial amounts of operating experience and repeatedly to check summary, for weighing different defect to transformer life Influence degree and the defect rank formulated and the defect coefficient of correspondence thereof.

In the present embodiment, step 6) use the final health index HI of function expression calculating transformer shown in formula (6), Calculated final health index HI is 3.05 eventually.

7) the residual life EOL of function expression calculating transformer shown in formula (7) is used；

EOL=ln7/HI/B (7)

In formula (7), the residual life of EOL indication transformer, the final health index of HI indication transformer, B represents transformation The aging coefficient of device.In the present embodiment, step 7) use the residual life EOL of function expression calculating transformer shown in formula (7), The value of the residual life EOL of final calculated transformator is 10.4, i.e. the residual life of this transformator 10.4, passes through Verify with equipment run the time limit, operation conditions is (equipment has run 26.6) being consistent.

The key point that the present embodiment solves is the selection of detection means, and the present embodiment is determining the aging of transformator Coefficient B, calculates main health level index HI according to the aging coefficient B of transformator and initial main health level index time of putting into operation_m On the basis of, have selected and dissolve based in the carbon carrier of oxygen content in detection transformator, furfural gas content in transformator, oil Carburetted hydrogen gas content, oil quality four class detection means carry out the comprehensive health index of calculating transformer, and distribute various based on weight The proportion of health index such that it is able to effectively overcome single method of testing or test result can not accurately reflect transformator The technical problem of state of insulation such that it is able to realize from detecting data to health index again to the conversion of transformator residual life. Another key point of the present embodiment is comprehensive health index and the calculating of final health index, and comprehensive health index is by respectively Point health index is weighted summation, by different weight coefficients take into full account load, oil degradation, paper aging, oily in dissolving The impact on transformer life of the parameters such as gas；Final health index is then to have taken into full account the defect pair that transformator was occurred The impact of transformer life.The combination of both Index for Calculation, substantially cover may affect transformer life each because of Element.In order to obtain transformer synthesis health index evaluation result, it is thus necessary to determine that the weight of each factor of evaluation.For complex object system The judge of system must relate to multiple factor, is difficult to make each factor weight coefficient, is i.e. difficult to each factor of true reflection in entirety In status, therefore need respective advantage according to master, objective weighted model to set up a kind of comprehensive analysis method, i.e. Evaluation formula. The present embodiment method thought based on Evaluation formula, combines subjectivity estimation with mathematical method, and mathematical method is strictly patrolled Collect property and the flexible strategy determined can be filtered and repair process, it is possible to multiple elements power of challenge will be formed objectively The overall of weight judges to be changed into carry out these elements " comparing two-by-two ", transfers the overall weight to these elements the most again to and carries out Sequence judges, finally establishes the weight of each element, is finally capable of remaining to transformator to health index from detection data again The conversion in life-span.In order to verify the correctness of present invention transformator based on health index residual life detection method, to Hunan The main transformer life-span of the most several transformer stations is assessed, and through actual verification, finds to utilize the present invention based on health index Transformator residual life detection method detects the summation of residual life and the actual motion time limit obtained and the projected life of transformation The most close, it was demonstrated that present invention transformator based on health index residual life detection method has sufficient correctness and feasible Property, and there is the advantage that accuracy of detection is high.

The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for the art Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications are also Should be regarded as protection scope of the present invention.

Claims (9)

1. a transformator residual life detection method based on health index, it is characterised in that step includes:

1) determining the aging coefficient B of transformator, aging coefficient B and initial main health level index according to transformator put into operation the time Calculate main health level index HI_m；

2) the carbon carrier of oxygen content in detection transformator, determines carbon carrier of oxygen content back according to the carbon carrier of oxygen content in transformator The health index HI reflected_C,O, detect the furfural gas content in transformator, determine bran according to the furfural gas content in transformator The health index HI of aldehyde gas content reflection_fur, according to the health index HI of carbon carrier of oxygen content reflection_C,O, furfural gas content The health index HI of reflection_furCOMPREHENSIVE CALCULATING paper insulation running status health index HI_iso；

3) oil of detection transformator dissolves carburetted hydrogen gas content, determine dissolving carburetted hydrogen gas in oil according to oil dissolves carburetted hydrogen gas content The health index HI of content reflection_C,H；

4) detect the oil quality of transformator, determine, according to the oil quality of transformator, the health index HI that oil quality reflects_oil；

5) for main health level index HI_m, paper insulation running status health index HI_iso, oil dissolves the reflection of carburetted hydrogen gas content Health index HI_C,H, oil quality reflection health index HI_oilFour kinds of health index, use function expression meter shown in formula (5) Calculate the comprehensive health index HI of transformator_com；

${\mathrm{HI}}_{com}=\underset{i=1}{\overset{4}{\&Sigma;}}{\mathrm{\&omega;}}_i{\mathrm{HI}}_{\left(i\right)}---\left(5\right)$

In formula (5), HI_comThe comprehensive health index of indication transformer, ω_iRepresent the weight of i-th kind of health index, HI_(i)Represent the The value of i kind health index；

6) use function expression calculating transformer shown in formula (6) by the revised final health index of defect correction coefficient HI；

HI=f × HI_com (6)

In formula (6), the final health index of HI indication transformer, the defect correction coefficient of f indication transformer, HI_comRepresent transformation The comprehensive health index of device；

7) the residual life EOL of function expression calculating transformer shown in formula (7) is used；

EOL=ln7/HI/B (7)

In formula (7), the residual life of EOL indication transformer, the final health index of HI indication transformer, B indication transformer Aging coefficient.

Transformator residual life detection method based on health index the most according to claim 1, it is characterised in that: described Step 1) in determine transformator aging coefficient B function expression such as formula (1-1) shown in；

B=(ln6.5-ln0.5)/(T₂-T₁) (1-1)

In formula (1-1), the aging coefficient of B indication transformer, T₁The time that indication transformer is corresponding when being brand-new equipment, T₂Represent The target time of transformator residual life.

Transformator residual life detection method based on health index the most according to claim 1, it is characterised in that: described Step 1) in determine transformator aging coefficient B function expression such as formula (1-2) shown in；

B=(ln6.5/0.5)/T'_exp (1-2)

In formula (1-2), the aging coefficient of B indication transformer, T'_expThe amendment design of indication transformer runs the time limit, and transformator Amendment design run the time limit calculating function expression such as formula (1-3) shown in；

${T^{\&prime;}}_{\exp }=\frac{T_{\exp }}{f_L\&times;f_E}---(1-3)$

In formula (1-3), T'_expThe amendment design of indication transformer runs the time limit, T_expDispatching from the factory design and operation year of indication transformer Limit, f_LFor the load coefficient of transformator, f_EEnvironmental coefficient for transformator.

Transformator residual life detection method based on health index the most according to claim 1, it is characterised in that: described Step 1) the main health level index HI of middle calculating_mFunction expression such as formula (1-4) shown in；

${\mathrm{HI}}_m={\mathrm{HI}}_0\&times;e^{B\&times;(T_2-T_1)}---(1-4)$

In formula (1-4), HI_mRepresent main health level index, HI₀The initial health water that indication transformer is corresponding when being brand-new equipment Flat index, the aging coefficient of B indication transformer, T₁The time that indication transformer is corresponding when being brand-new equipment, T₂Indication transformer remains The target time in remaining life-span.

Transformator residual life detection method based on health index the most according to claim 1, it is characterised in that: described Step 2) detailed step include:

2.1) the CO content in detection transformator, CO₂Content, CO and CO₂The content of mixture content totally three kinds of carbon carrier of oxygen parameters, The carbon carrier of oxygen that content inquiry according to each carbon carrier of oxygen parameter is preset calculates parameter list and obtains the calculating parameter of correspondence, root The carbon oxygen index deterioration factor that each carbon carrier of oxygen parameter is corresponding is calculated, according to presetting according to function expression shown in formula (2-1) Weight by corresponding for all carbon carrier of oxygen parameters carbon oxygen index deterioration factor, use formula (2-2) comprehensively to obtain carbon carrier of oxygen and contain The health index HI of amount reflection_C,O；

$\left\{\begin{array}{cc}{F}_{C,O}\left(i\right)={\mathrm{ax}}_i+b& x_i<=c\\ F_{C,O}\left(i\right)=10& x_i>c\end{array}\right.---(2-1)$

In formula (2-1), F_C,OI () represents the carbon oxygen index deterioration factor that i-th kind of carbon carrier of oxygen parameter is corresponding, a and b is pre-for inquiry If calculate parameter list obtain i-th kind of calculating parameter corresponding to carbon carrier of oxygen parameter, x_iRepresent containing of i-th kind of carbon carrier of oxygen parameter Amount, c represents the critical contents that i-th kind of carbon carrier of oxygen parameter is corresponding；

${\mathrm{HI}}_{C,O}=\underset{i=1}{\overset{3}{\&Sigma;}}{\mathrm{\&omega;}}_i\&times;F_{C,O}\left(i\right)---(2-2)$

In formula (2-2), HI_C,ORepresent the health index of carbon carrier of oxygen content reflection, ω_iRepresent that i-th kind of carbon carrier of oxygen parameter is corresponding Weight, F_C,OI () represents the carbon oxygen index deterioration factor that i-th kind of carbon carrier of oxygen parameter is corresponding；

2.2) furfural content in detection transformator, calculates furfural gas according to the furfural content in transformator and formula (2-3) and contains The health index HI of amount reflection_fur；

HI_fur=2.33 × (C_fur)^0.68 (2-3)

In formula (2-3), HI_furRepresent the health index of furfural gas content reflection, C_furFurfural content in indication transformer；

2.3) according to the health index HI of carbon carrier of oxygen content reflection_C,O, furfural gas content reflection health index HI_fur, adopt With formula (2-4) COMPREHENSIVE CALCULATING paper insulation running status health index HI_iso；

HI_iso=ω₁HI_C,O+ω₂HI_fur (2-4)

In formula (2-4), ω₁Represent the health index HI of carbon carrier of oxygen content reflection_C,OCorresponding weight, HI_C,ORepresent carbon carrier of oxygen The health index of content reflection, ω₂Represent the health index HI of furfural gas content reflection_furCorresponding weight, HI_furRepresent bran The health index of aldehyde gas content reflection.

Transformator residual life detection method based on health index the most according to claim 1, it is characterised in that: described Step 3) detailed step include:

3.1) H in detection transformator₂Content, CH₄Content, C₂H₆Content, C₂H₄Content, C₂H₂Content totally five kinds of hydrocarbon gas ginsengs The content of amount, inquires about the hydrocarbon gas calculating parameter list preset and obtains the meter of correspondence according to the content of each hydrocarbon gas parameter Calculate parameter；

3.2) according to function expression shown in formula (3-1) calculate each hydrocarbon gas parameter corresponding hydrocarbon index deterioration because of Son；

$\left\{\begin{array}{cc}{F}_{C,H}\left(i\right)={\mathrm{ax}}_i+b& x_i<=c\\ F_{C,H}\left(i\right)=10& x_i>c\end{array}\right.---(3-1)$

In formula (3-1), F_C,HI () represents the hydrocarbon index deterioration factor that i-th kind of hydrocarbon gas parameter is corresponding, a and b is pre-for inquiry If the parameter list that calculates obtain i-th kind of calculating parameter corresponding to hydrocarbon gas parameter, c represents that i-th kind of hydrocarbon gas parameter is corresponding Critical contents, x_iRepresent the content of i-th kind of hydrocarbon gas parameter；

3.3) according to the weight preset, hydrocarbon index deterioration factor integration corresponding for all hydrocarbon gas parameters is obtained in oil molten Solve the health index HI of carburetted hydrogen gas content reflection_C,H；

${\mathrm{HI}}_{C,H}=\underset{i=1}{\overset{5}{\&Sigma;}}{\mathrm{\&omega;}}_i{F}_{C,H}\left(i\right)---(3-2)$

In formula (2-2), HI_C,HRepresent the health index dissolving the reflection of carburetted hydrogen gas content in oil, ω_iRepresent i-th kind of hydrocarbon gas ginseng The weight that amount is corresponding, F_C,HI () represents the hydrocarbon index deterioration factor that i-th kind of hydrocarbon gas parameter is corresponding.

Transformator residual life detection method based on health index the most according to claim 1, it is characterised in that: described Step 4) detailed step include:

4.1) micro-water content of oil of detection transformator, acid number, dielectric loss, the value of breakdown voltage totally four kinds of oil quality parameters；

4.2) micro-water content, acid number, dielectric loss, four kinds of oil quality parameters of breakdown voltage are determined according to the electric pressure of transformator Oil quality factor score segmentation calculate function, according to segmentation calculate function calculate micro-water content, acid number, dielectric loss, hit Wear the oil quality factor score of four kinds of oil quality parameters of voltage；

4.3) the health index HI of oil quality reflection is calculated according to formula (4-1) described function expression_oil；

${\mathrm{HI}}_{oil}=\underset{i=1}{\overset{4}{\&Sigma;}}{\mathrm{\&omega;}}_i\&times;F_{oil}\left(i\right)---(4-1)$

In formula (4-1), HI_oilRepresent the health index of oil quality reflection, ω_iRepresent the weight that i-th kind of oil quality parameter is corresponding, F_oilI () represents the oil quality factor score that i-th kind of oil quality parameter is corresponding.

Transformator residual life detection method based on health index the most according to claim 7, it is characterised in that: described Step 4.2) in determine micro-water content, acid number, dielectric loss, four kinds of oil qualities of breakdown voltage ginseng according to the electric pressure of transformator When the segmentation of the oil quality factor score of amount calculates function, the segmentation of the oil quality factor score that dielectric loss is corresponding calculates function As shown in formula (4-2)；

$F_{oil}\left(\mathrm{\&delta;}\right)=\left\{\begin{array}{cc}0& x\&le;0.05\\ 20x-1& x\&Element;(0.05,0.15\&rsqb;\\ 5.714x+1.143& x\&Element;(0.15,0.5\&rsqb;\\ 4x+2& x\&Element;(0.5,1.5\&rsqb;\\ 10& x>1.5\end{array}\right.---(4-2)$

In formula (4-2), F_oil(δ) representing the oil quality factor score that dielectric loss is corresponding, x represents the value of dielectric loss；

When the electric pressure of transformator is less than 69kV, the segmentation of the oil quality factor score that micro-water content is corresponding calculates function such as Shown in formula (4-3), the segmentation of the oil quality factor score that acid number is corresponding calculates shown in function such as formula (4-4), and breakdown voltage is corresponding The segmentation of oil quality factor score calculate shown in function such as formula (4-5)；

$F_{oil}\left(H_{2}O\right)=\left\{\begin{array}{cc}0& x\&le;20\\ 0.2x-4& x\&Element;(20,30\&rsqb;\\ 0.4x-10& x\&Element;(30,45\&rsqb;\\ 10& x>45\end{array}\right.---(4-3)$

In formula (4-3), F_oil(H₂O) representing the oil quality factor score that micro-water content is corresponding, x represents the value of micro-water content；

$F_{oil}\left(acid\right)=\left\{\begin{array}{cc}0& x\&le;0.015\\ 23.53x-0.353& x\&Element;(0.015,0.1\&rsqb;\\ 20x& x\&Element;(0.1,0.2\&rsqb;\\ 40x-4& x\&Element;(0.2,0.3\&rsqb;\\ 10& x>0.3\end{array}\right.---\left(4-4\right)$

In formula (4-4), F_oil(acid) representing the oil quality factor score that acid number is corresponding, x represents acid number；

$F_{oil}\left(V\right)=\left\{\begin{array}{cc}10& x\&le;30\\ -0.4x+20& x\&Element;(30,40\&rsqb;\\ -0.667x+30.68& x\&Element;(40,43\&rsqb;\\ -x+45& x\&Element;(43,45\&rsqb;\\ 0& x>45\end{array}\right.---(4-5)$

In formula (4-5), F_oil(V) representing the oil quality factor score that breakdown voltage is corresponding, x represents the value of breakdown voltage；

When the electric pressure of transformator is more than 69kV and is less than 230kV, dividing of the oil quality factor score that micro-water content is corresponding Section calculates shown in function such as formula (4-6), and the segmentation of the oil quality factor score that acid number is corresponding calculates shown in function such as formula (4-7), The segmentation of the oil quality factor score that breakdown voltage is corresponding calculates shown in function such as formula (4-8)；

$F_{oil}\left(H_{2}O\right)=\left\{\begin{array}{cc}0& x\&le;10\\ 0.2x-2& x\&Element;(10,20\&rsqb;\\ 0.4x-6& x\&Element;(20,35\&rsqb;\\ 10& x>35\end{array}\right.---(4-6)$

In formula (4-6), F_oil(H₂O) representing the oil quality factor score that micro-water content is corresponding, x represents the value of micro-water content；

$F_{oil}\left(acid\right)=\left\{\begin{array}{cc}0& x\&le;0.015\\ 23.53x-0.353& x\&Element;(0.015,0.1\&rsqb;\\ 40x-2& x\&Element;(0.1,0.25\&rsqb;\\ 10& x>0.25\end{array}\right.---(4-7)$

In formula (4-7), F_oil(acid) representing the oil quality factor score that acid number is corresponding, x represents acid number；

$F_{oil}\left(V\right)=\left\{\begin{array}{cc}10& x\&le;35\\ -0.4x+22& x\&Element;(35,40\&rsqb;\\ -0.286x+17.44& x\&Element;(40,47\&rsqb;\\ -0.667x+35.35& x\&Element;(47,50\&rsqb;\\ -x+52& x\&Element;(50,52\&rsqb;\\ 0& x>52\end{array}\right.---(4-8)$

In formula (4-8), F_oil(V) representing the oil quality factor score that breakdown voltage is corresponding, x represents the value of breakdown voltage；

When the electric pressure of transformator is more than 230kV, the segmentation of the oil quality factor score that micro-water content is corresponding calculates function As shown in formula (4-9), the segmentation of the oil quality factor score that acid number is corresponding calculates shown in function such as formula (4-10), breakdown voltage pair The segmentation of the oil quality factor score answered calculates shown in function such as formula (4-11)；

$F_{oil}\left(H_{2}O\right)=\left\{\begin{array}{cc}0& x\&le;10\\ 0.4x-4& x\&Element;(10,30\&rsqb;\\ 10& x>30\end{array}\right.---(4-9)$

In formula (4-9), F_oil(H₂O) representing the oil quality factor score that micro-water content is corresponding, x represents the value of micro-water content；

$F_{oil}\left(acid\right)=\left\{\begin{array}{cc}0& \&le;0.015\\ 57.14x-0.857& x\&Element;(0.015,0.05\&rsqb;\\ 40x& x\&Element;(0.05,0.2\&rsqb;\\ 10& x>0.2\end{array}\right.---(4-10)$

In formula (4-10), F_oil(acid) representing the oil quality factor score that acid number is corresponding, x represents acid number；

$F_{oil}\left(V\right)=\left\{\begin{array}{cc}10& x\&le;40\\ -0.4x+24& x\&Element;(40,60\&rsqb;\\ 0& x>60\end{array}\right.---(4-11)$

In formula (4-11), F_oil(V) representing the oil quality factor score that breakdown voltage is corresponding, x represents the value of breakdown voltage.

Transformator residual life detection method based on health index the most according to claim 1, it is characterised in that: described Step 6) in the determination step of defect correction coefficient f of transformator as follows: first the defect of transformator is categorized as general defect, Major defect and urgent defect, and be general defect, major defect and urgent defect given defect radix, by general defect time Number is multiplied by the defect radix of general defect and is multiplied by the defect radix of major defect plus major defect, adds urgent defect and is multiplied by The defect radix of urgent defect obtains the value of defect rank, inquires about, according to the value of defect rank, the defect rank coefficient table preset, Obtain the defect correction coefficient f of transformator.