CN108960445A - A kind of direct current grounding pole method for evaluating state based on Set Pair Analysis - Google Patents
A kind of direct current grounding pole method for evaluating state based on Set Pair Analysis Download PDFInfo
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Abstract
The invention discloses a kind of direct current grounding pole method for evaluating state based on Set Pair Analysis, is related to DC earthing electrode systems O&M and service technique field.The method step is respectively as follows: the index for choosing direct current grounding pole status assessment, establishes State Assessment Index System；It determines index relative inferiority degree, divides direct current grounding pole state grade；Parameter variable weight value；The Pair Analysis of index and level status under each index system is calculated using Method of Set Pair Analysis；According to reliability criterion, it is horizontal to calculate direct current grounding pole holistic health；According to direct current grounding pole state grade is divided, the corresponding state grade of direct current grounding pole is determined.Many quantitative, qualitative factors are comprehensively considered, proposes and is assessed using state of the Set Pair Analysis Method to direct current grounding pole, the method improves the science and accuracy of earthing pole status assessment.Direct current grounding pole state grade is judged in conjunction with reliability criterion, avoids judgement misalignment problem of the maximum attribute measurement rule in state grade difference very little.
Description
Technical field
The present invention relates to DC earthing electrode systems O&M and service technique field, and in particular to a kind of based on Set Pair Analysis
Direct current grounding pole method for evaluating state.
Background technique
Spatially distributed pole is unbalanced with load center for China's energy, and resulting in China can source remote distance, extensive stream
Dynamic inexorable trend.Extra-high voltage direct-current transmission is with its conveying advantage that capacitance is big, conveying distance is remote, in energy flowing now
In have consequence.And earthing pole not only plays pincers as a component part indispensable in DC transmission system
The effect of neutral point potential processed also constructs circuit for DC current, and the earth current of converter station is introduced the earth.Direct current grounding pole
The safety and stability level of system will have a direct impact on the reliability of direct current transportation.Therefore, for the status assessment of direct current grounding pole
Significant, traditional state evaluating method often will the on-line monitoring indexs system such as index system and electrical test, walkaround inspection orphan
It is vertical to come, and it is directed to single index system, it is also independent from each other between each index parameter.Conventional method does not consider same
The identical degree of research object, diversity factor and opposition degree in system.Institute in the conventional way cannot be all-sidedly and accurately to direct current grounding pole
The general level of the health is assessed.
Summary of the invention
The purpose of the present invention is to provide a kind of the direct current grounding pole method for evaluating state based on Set Pair Analysis, solution tradition
Influencing each other between each factor is not considered in state evaluating method, causing cannot be all-sidedly and accurately to the direct current grounding pole general level of the health
The problem of being assessed.
In order to solve the above technical problems, the invention adopts the following technical scheme: a kind of direct current based on Set Pair Analysis connects
Earth polar method for evaluating state, it is characterised in that: selection electrical test, on-Line Monitor Device, walkaround inspection and O&M situation first
Four index systems construct direct current grounding pole State Assessment Index System；Then the relative inferiority degree for determining each index, delimited simultaneously
Direct current grounding pole state grade evaluation criterion；Secondly variable weight processing further is carried out to the normal weight of each index, calculates each finger
Target variable weight value；Followed by Method of Set Pair Analysis, the Pair Analysis of index and level status under each index system is calculated；Last benefit
Comprehensive assessment is carried out to direct current grounding pole operating status grade with reliability criterion, determines the corresponding state grade of direct current grounding pole.
Further technical solution be the following steps are included:
S1, the index for choosing direct current grounding pole status assessment, establish State Assessment Index System X, the index system X by
U1、U2、V1、V2Index system is constituted, wherein U1、U2It respectively indicates and is made up of the quantitative target that electrical test, on-line monitoring obtain
Index system, V1、V2Index system respectively indicates the index system being made up of the qualitative index of walkaround inspection, the acquisition of O&M situation；
X=(U1, U2, V1, V2) (1)
Wherein: electrical test index system U1The index u for including11~u15It is respectively as follows: that D.C. resistance, ground resistance, stride electricity
Pressure, contact potential, conduction；
Monitor index system U on-line2The index u for including21~u25It is respectively as follows: running current, soil corrosion current potential, soil salt
Amount, soil resistivity, polar ring temperature；
Walkaround inspection index system V1The index v for including11~v14It is respectively as follows: depression situation, shunt cable appearance, ground connection with enters
Downlead appearance, water seepage hole stopping state；
O&M situation index system V2The index v for including21~v23It is respectively as follows: maintenance data, the operation time limit, excavates inspection；
S2, the relative inferiority degree for determining each index: to U1、U2A series of quantitative targets introduce the relative inferiority degree x of indexm,
xmIndicate the case where each index deviates design value, the usual value of range is [0,1]；Work as xmValue it is bigger, show that index more tends to
Deterioration state；xmCalculation formula is as follows:
In formula, a is the design value of the index parameter；B is the threshold limit value of the index parameter；A, b is that direct current grounding pole is set
Count book required value；
To V1、V2A series of qualitative indexes carry out the quantitative evaluation of relative inferiority degree using expert analysis mode system.
Delimit direct current grounding pole state grade evaluation criterion: according to xmThe state of direct current grounding pole is divided by the size of value
Four grades respectively normally, pay attention to, are abnormal, is serious；R is used respectively1、r2、r3、r4It indicates.It is denoted as set R=(r1, r2, r3,
r4), the corresponding relationship between relative inferiority degree value range and direct current grounding pole integrality grade is as follows:
Work as xmWhen between 0 and 0.2, show that the state of direct current grounding pole is normal condition, index parameter variation fluctuation pole
It is small and close to design value；
Work as xmWhen between 0.2 and 0.5, show that the state of direct current grounding pole is attention state, quantity of state variation tendency court
Develop far from design value direction, the frequency of walkaround inspection should be improved；
Work as xmWhen between 0.5 and 0.7, abnormality, quantity of state is changed greatly, and is substantially more than design value, is pacified in due course
It lists and indexes and repairs；
Work as xmWhen between 0.7 and 1, severe conditions, quantity of state is seriously more than design value and fastly close to threshold limit value, Ying Li
Arrange maintenance.
S3, parameter variable weight value: when can not really reflect that direct current grounding pole index parameter deviates normal value for normal power
On the deficiency that index system total evaluation influences, variable weight processing is carried out to index parameter, weight vector can be represented by the formula:
[ω(x1), ω (x2), ω (x3)……ω(xn)] (7)
The variable weight value of each index parameter are as follows:
δ is variable weight coefficient in formula, it is contemplated that the substantial deviation of state index parameter will affect the peace of entire direct current grounding pole
Quan Xing takes δ=0.2, ωm (0)Normal weight for the normal weight of index, each index parameter is as follows: electrical test U1Shared weight is
0.301, u under the index system11~u15The normal weight of index is respectively as follows: 0.133,0.169,0.265,0.235,0.198；
Monitor U on-line2Shared weight is 0.246, u under the index system21~u25The normal weight of index is respectively as follows: 0.183,
0.215,0.163,0.199,0.240；
Walkaround inspection V1Shared weight is 0.234, v under the index system11~v14The normal weight of index is respectively as follows: 0.331,
0.350,0.109,0.210；
O&M situation V2Shared weight is 0.219, v under the index system21~v22The normal weight of index is respectively as follows: 0.245,
0.314,0.441；
S4, the Pair Analysis that index and level status under each index system are calculated using Method of Set Pair Analysis: if index body
System is made of n parameter, and its corresponding state grade is divided into K class, if index xmConstitute set U, U=(x1, x2,
x3.....xn), state grade constitutes set R, R=(r1, r2, r3... .rn), M=(U, R) is enabled, then xmWith k grades of states
K member Pair Analysis is shown below:
Then collection can be represented by the formula the K member Pair Analysis ρ of M:
, it is specified that s in above formula1~sK-1For state grade threshold value；amFor the Pair Analysis of index and the 1st grade of state；bmFor index
Belong to the Pair Analysis of z+1 grades of states；Specified cmFor the Pair Analysis of index and afterbody state；ωmFor the corresponding power of index
Weight.
S5, according to reliability criterion, it is horizontal to calculate direct current grounding pole holistic health: setting (r1、r2、r3.....rK) it is attribute space
The orderly segmentation of R arranges, and λ is confidence level；λ=0.65 is defined in the present invention, if in r1>r2>r3.....>rKWhen, i.e., corresponding shape
When state grade is by deteriorating well:
If r1<r2<r3.....<rKWhen, i.e., when corresponding state grade is good by deterioration:
In formula, 1≤k≤K then can determine that corresponding state is at this timeIf any index system is severe conditions, direct current
Earthing pole holistic health state is serious.
S6, according to divide direct current grounding pole state grade, determine the corresponding state grade of direct current grounding pole.
Further technical solution is the expert analysis mode specific implementation method in the step S2 are as follows: assuming that each qualitative
Index is initially scored at 100 points, and referring to evaluation criterion, expert is according to practical tour and report over the years according to personal experience and visitor
The deduction of points that data provide each index quantity of state is seen, the ratio for defining total penalties number and initial score is the phase for being defined as qualitative index
To degradation.
If further technical solution be in the step S4 any index system state be it is serious, determine that earthing pole is whole
Body state be it is serious, otherwise enter step S5.
Working principle: DC earthing is obtained according to electrical test, on-Line Monitor Device, walkaround inspection, O&M situation first
The important indicator of pole status assessment constructs direct current grounding pole status assessment model；Then according to relative inferiority degree definition and expert
Scoring mechanism determines quantitative, qualitative index relative inferiority degree respectively；Secondly earthing pole operation can not be objectively responded for normal weight
The deficiency of state, further carries out variable weight processing to the normal weight of each index, and derivation calculates each index weights；Followed by collection pair
Analysis method portrays connecting each other, influence and converting between each index, is handled by tectonic link degree and its mathematic(al) representation
The uncertainty and ambiguity of evaluation index realize the grade classification to direct current grounding pole system mode；It is finally quasi- using reliability
Comprehensive assessment then is carried out to direct current grounding pole operating status grade, determines most effective earthing pole state grade.
The present invention comprehensively considers factors, proposes and is carried out using state of the Method of Set Pair Analysis to earthing pole
Assessment, it is contemplated that conversion, connection and influence between uncertain and certainty improve the reliable of earthing pole status assessment
Property, guarantee is provided for the stable operation of DC power transmission line.
Compared with prior art, it the beneficial effects of the present invention are: many quantitative, qualitative factors are comprehensively considered, mentions
Go out and assessed using state of the Set Pair Analysis Method to direct current grounding pole, the method improves the science of earthing pole status assessment
Property and accuracy.Meanwhile direct current grounding pole state grade is judged in conjunction with reliability criterion, the maximum attribute measurement rule is avoided in shape
Judgement misalignment problem when state grade differential very little.
Detailed description of the invention
Fig. 1 is direct current grounding pole structural schematic diagram in the present invention.
Fig. 2 is evaluation index system figure in the present invention.
Fig. 3 is direct current grounding pole status assessment flow diagram in the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
Embodiment
Shown in referring to Fig.1~3, a kind of direct current grounding pole method for evaluating state based on Set Pair Analysis, it is characterised in that packet
Include following steps:
S1, the index for choosing direct current grounding pole status assessment, establish State Assessment Index System X, the index system X by
U1、U2、V1、V2Index system is constituted, wherein U1、U2It respectively indicates and is made up of the quantitative target that electrical test, on-line monitoring obtain
Index system, V1、V2Index system respectively indicates the index system being made up of the qualitative index of walkaround inspection, the acquisition of O&M situation；
X=(U1, U2, V1, V2) (1)
Wherein electrical test index system U1The index u for including11~u15It is respectively as follows: that D.C. resistance, ground resistance, stride electricity
Pressure, contact potential, conduction；Electrical test index is the specified pilot project that operating standard requires, and can effectively judge direct current
The operating condition of earthing pole.Monitor index system U on-line2The index u for including21~u25It is respectively as follows: running current, soil corrosion electricity
Position, soil salt amount, soil resistivity, polar ring temperature；Soil parameters is to directly result in earthing pole ontology corruption in on-line monitoring index
The main reason for erosion.Walkaround inspection index system V1The index v for including11~v14It is respectively as follows: depression situation, shunts outside cable with entering
Sight, down conductor appearance, water seepage hole stopping state；O&M situation index system V2The index v for including21~v23It is respectively as follows: inspection
It repairs data, the operation time limit, excavate inspection.
S2, the relative inferiority degree for determining each index: to U1、U2A series of quantitative targets introduce the relative inferiority degree x of indexm,
xmIndicate the case where each index deviates design value, the usual value of range is [0,1]；Work as xmValue it is bigger, show that index more tends to
Deterioration state；xmCalculation formula is as follows:
In formula, a is the design value of the index parameter；B is the threshold limit value of the index parameter；A, b is that direct current grounding pole is set
Book required value is counted, uses the value of " Tianguang HVDC horse flanks earth polar design instruction " in the present invention, each index parameter is corresponding
A, b value is as follows: a11=0.154 Ω, b11=0.194 Ω；a12=0.295 Ω, b12=0.5 Ω；a13=4.98V, b13=36V；
a14=5V, b14=36V；a15=50m Ω, b15=1 Ω；When monopolar operation: a21=1800A, b21=1980A, when bipolar operation:
a21=20A, b21=60A；a22=0.001V, b22=0.01V；a23=0.02mg/g, b23=0.1mg/g；a24=0.01 Ω
m、b24=0.3 Ω m；a25=50 DEG C, b25=78 DEG C.May be variant for different direct current grounding pole a, b values, it is promoting
A, b value are replaced in application process.
To V1、V2A series of qualitative indexes carry out the quantitative evaluation of relative inferiority degree using expert analysis mode system.Specific method is
Assuming that each qualitative index is initially scored at 100 points, according to " ± 500kV-± 800kV direct current grounding pole state evaluation directive/guide
(tentative) " evaluation criterion that provides, expert makes an inspection tour and report over the years provides respectively according to personal experience and objective data according to practical
The deduction of points of index quantity of state, the ratio for defining total penalties number and initial score is the opposite degradation for being defined as qualitative index.
Delimit direct current grounding pole state grade evaluation criterion: according to xmThe state of direct current grounding pole is divided by the size of value
Four grades respectively normally, pay attention to, are abnormal, is serious；R is used respectively1、r2、r3、r4It indicates.It is denoted as set R=(r1, r2, r3,
r4), the corresponding relationship between relative inferiority degree value range and direct current grounding pole integrality grade is as follows:
Work as xmWhen between 0 and 0.2, show that the state of direct current grounding pole is normal condition, index parameter variation fluctuation pole
It is small and close to design value；
Work as xmWhen between 0.2 and 0.5, show that the state of direct current grounding pole is attention state, quantity of state variation tendency court
Develop far from design value direction, the frequency of walkaround inspection should be improved；
Work as xmWhen between 0.5 and 0.7, abnormality, quantity of state is changed greatly, and is substantially more than design value, is pacified in due course
It lists and indexes and repairs；
Work as xmWhen between 0.7 and 1, severe conditions, quantity of state is seriously more than design value and fastly close to threshold limit value, Ying Li
Arrange maintenance.
S3, parameter variable weight value: when can not really reflect that direct current grounding pole index parameter deviates normal value for normal power
On the deficiency that index system total evaluation influences, variable weight processing is carried out to index parameter, weight vector can be represented by the formula:
[ω(x1), ω (x2), ω (x3)……ω(xn)] (7)
The variable weight value of each index parameter are as follows:
δ is variable weight coefficient in formula, it is contemplated that the substantial deviation of state index parameter will affect the peace of entire direct current grounding pole
Quan Xing takes δ=0.2, ωm (0)Normal weight for the normal weight of index, each index parameter is as follows: electrical test U1Shared weight is
0.300, u under the system11~u15The normal weight of index is respectively as follows: 0.133,0.169,0.265,0.235,0.198, monitors U on-line1
Shared weight is 0.247, u under the system21~u25The normal weight of index is respectively as follows: 0.183,0.215,0.163,0.199,
0.240。
Walkaround inspection index system V1Shared weight is 0.234, v under the system11~v14The normal weight of index is respectively as follows: 0.331,
0.350,0.109,0.210, O&M situation index system V2Shared weight is 0.219, v under the system21~v22The normal weight of index point
Not are as follows: 0.245,0.314,0.441.
The normal weight of These parameters can be according to " ± 500kV-± 800kV direct current grounding pole state evaluation directive/guide (tentative) "
It chooses.In directive/guide according to index to the influence degree of direct current grounding pole operating status, it is specified that the value range of index weights coefficient
For [1,10].The index weights summation of all indexs is 100.By taking electrical test index as an example, index u in electrical specifications system11~
u15Weight coefficient be respectively 4,5.1,7.98,7.1,5.92, then it is 30.1 that electrical specifications system, which generally refers to mark weight coefficient, therefore electric
The total weighted value of gas test index system accounts for the 0.301, u of global index weighted value11~u15Each index is in electrical test index system
The normal weight of index be respectively 0.133,0.169,0.265,0.235,0.198.
S4, the Pair Analysis that index and level status under each index system are calculated using Method of Set Pair Analysis: if index body
System is made of n parameter, and its corresponding state grade is divided into K class, if index xmConstitute set U, U=(x1, x2,
x3.....xn), state grade constitutes set R, R=(r1, r2, r3... .rn), M=(U, R) is enabled, then xmWith k grades of states
K member Pair Analysis is shown below:
Then collection can be represented by the formula the K member Pair Analysis ρ of M:
, it is specified that s in above formula1~sK-1For state grade threshold value；amFor the Pair Analysis of index and the 1st grade of state；bmFor index
Belong to the Pair Analysis of z+1 grades of states；Specified cmFor the Pair Analysis of index and afterbody state；ωmFor the corresponding power of index
Weight.
If any index system state is serious in this step, determine earthing pole integrality be it is serious, otherwise enter step
Rapid S5.
S5, according to reliability criterion, it is horizontal to calculate direct current grounding pole holistic health: setting (r1、r2、r3.....rK) it is attribute space
The orderly segmentation of R arranges, and λ is confidence level；λ=0.65 is defined in the present invention, if in r1>r2>r3.....>rKWhen, i.e., corresponding shape
When state grade is by deteriorating well:
If r1<r2<r3.....<rKWhen, i.e., when corresponding state grade is good by deterioration:
In formula, 1≤k≤K then can determine that corresponding state is at this timeIf any index system is severe conditions, direct current
Earthing pole holistic health state is serious.
S6, according to divide direct current grounding pole state grade, determine the corresponding state grade of direct current grounding pole.
Above-mentioned appraisal procedure is illustrated by taking design parameter as an example below:
Steps are as follows for a kind of direct current grounding pole method for evaluating state based on Set Pair Analysis:
S1, it is mentioned according to electrical test form data, on-Line Monitor Device, walkaround inspection record, O&M situation historical record
The status assessment parameter of direct current grounding pole is taken, design parameter is as follows: u11=0.170 Ω, u12=0.424 Ω, u13=18.9V, u14
=21.12V, u15=0.335 Ω；u21=45.6A, u22=0.007V, u23=0.062V, u24=0.146V, u25=67.1 DEG C.
S2, the relative inferiority degree that each index is determined according to the index parameter of extraction, each index being calculated according to formula (6)
Parameter relative inferiority degree is as follows: xu11=0.40, xu12=0.63, xu13=0.45, xu14=0.52, xu15=0.30；xu21=
0.64、xu22=0.62, xu23=0.53, xu24=0.47, xu25=0.61；The qualitative index provided according to expert-scoring system is opposite
Impairment grade is as follows: xv11=0.32, xv12=0.29, xv13=0.33, xv14=0.25；xv21=0.22, xv22=0.3, xv23=
0.31。
S3, using formula (8) parameter variable weight value, each index variable weight value is specific as follows: ωu11=0.119, ωu12=
0.221、ωu13=0.253, ωu14=0.251, ωu15=0.156；ωu21=0.205, ωu22=0.231, ωu23=
0.147、ωu24=0.164, ωu25=0.253；ωv11=0.286, ωv12=0.392, ωv13=0.101, ωv14=
0.221；ωv21=0.235, ωv22=0.255, ωv23=0.510.
S4, the Pair Analysis that index and level status under each index system are calculated according to formula (9) (10).Expression formula is as follows:
u11=0.8i1+0.2i2
u12=0.7i2+0.3j
u13=0.6i1+0.4i2
u14=0.32i1+0.68i2
u15=0.33+0.67i1 (13)
u21=0.6i2+0.4j
u22=0.8i2+0.2j
u23=0.28i1+0.72i2
u24=0.52i1+0.48i2
u25=0.9i2+0.1j
v11=0.2+0.8i1
v12=0.4+0.6i1
v13=0.13+0.87i1
v14=0.67+0.33i1
v21=0.87+0.13i1
v22=0.53+0.24i1
v23=0.33+0.67i1
According to variable weight value of each index under corresponding index system, the K member Pair Analysis of each index system, calculated result is calculated
It is as follows:
U1=0.039+0.432i1+0.450i2+0.066j (14)
U2=0+0.126i1+0.721i2+0.154j (15)
V1=0.361+0.639i1+0i2+0j (16)
V2=0.525+0.475i1+0i2+0j (17)
S5, according to the weight proportion of each index system, it is horizontal that weighted average obtains direct current grounding pole holistic health are as follows:
X=(0.2133,0.4146,0.3128,0.0593) (18)
Judged according to reliability criterion formula (11), r1+r2+r3(0.2133+0.4146+0.3128) is more than or equal to λ (0.65),
Although r1+r2+r3+r4Also meet formula (11), but the minimum K value for meeting formula (11), i.e. K=3, i.e., earthing pole at this time should be taken
Holistic health state is r3, i.e. abnormality should arrange to overhaul.And U at this time1、U2、V1、V2Index system abnormality is corresponding
Degree of being is respectively 0.450,0.721,0,0.Therefore from U2The state of the angle evaluation earthing pole of (on-line monitoring) is most suitable.Right
It monitors the corrosion potential of discovery at this time when index is checked on-line and there is abnormal, the discovery when carrying out excavating inspection to earthing pole
One section of corrosion of earthing pole is more serious, and actual conditions are consistent with evaluation result.
If being judged according to the maximum attribute measurement rule, maximum value is 0.4146 at this time, and direct current grounding pole state is to pay attention to.
Therefore: reliability criterion avoids judgement misalignment of the maximum attribute measurement rule in state grade difference very little
Phenomenon.
Effect analysis: it is used by above example and shows that the assessment strategy based on Set Pair Analysis can be used to judge direct current
The single index of earthing pole and holistic health state, appraisal procedure is scientific, feasible, and judging result is effectively, accurately.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations will fall in this Shen
It please be within disclosed scope and spirit.More specifically, disclose in the application, drawings and claims in the range of, can
With the building block to theme combination layout or it is laid out progress various deformation and improvement.In addition to what is carried out to building block or layout
Outside modification and improvement, to those skilled in the art, other purposes also be will be apparent.
Claims (4)
1. a kind of direct current grounding pole method for evaluating state based on Set Pair Analysis, it is characterised in that: first selection electrical test,
Four line monitoring device, walkaround inspection and O&M situation index systems construct direct current grounding pole State Assessment Index System；Then really
The relative inferiority degree of fixed each index, while delimiting direct current grounding pole state grade evaluation criterion；Secondly further to each index
Normal weight carries out variable weight processing, calculates the variable weight value of each index；Followed by Method of Set Pair Analysis, calculate under each index system
The Pair Analysis of index and level status；Comprehensive assessment finally is carried out to direct current grounding pole operating status grade using reliability criterion,
Determine the corresponding state grade of direct current grounding pole.
2. the direct current grounding pole method for evaluating state according to claim 1 based on Set Pair Analysis, it is characterised in that: including
Following steps:
S1, the index for choosing direct current grounding pole status assessment, establish State Assessment Index System X, the index system X is by U1、
U2、V1、V2Index system is constituted, wherein U1、U2Respectively indicate the finger being made up of the quantitative target that electrical test, on-line monitoring obtain
Mark system, V1、V2Index system respectively indicates the index system being made up of the qualitative index of walkaround inspection, the acquisition of O&M situation；
X=(U1, U2, V1, V2) (1)
Wherein: electrical test index system U1The index u for including11~u15It is respectively as follows: D.C. resistance, ground resistance, step voltage, connects
Electric shock gesture, conduction；
Monitor index system U on-line2The index u for including21~u25It is respectively as follows: running current, soil corrosion current potential, soil salt amount, soil
Earth resistivity, polar ring temperature；
Walkaround inspection index system V1The index v for including11~v14It is respectively as follows: depression situation, shunts under cable appearance, grounding lead with entering
Line appearance, water seepage hole stopping state；
O&M situation index system V2The index v for including21~v23It is respectively as follows: maintenance data, the operation time limit, excavates inspection；
S2, the relative inferiority degree for determining each index: to U1、U2A series of quantitative targets introduce index relative inferiority degree xm, xm
Indicate the case where each index deviates design value, the usual value of range is [0,1]；Work as xmValue it is bigger, show that index more tends to
Deterioration state；xmCalculation formula is as follows:
In formula, a is the design value of the index parameter；B is the threshold limit value of the index parameter；A, b is direct current grounding pole design sheets
Required value；
To V1、V2A series of qualitative indexes using expert analysis mode system carry out relative inferiority degree quantitative evaluation；
Delimit direct current grounding pole state grade evaluation criterion: according to xmThe state of direct current grounding pole is divided into four etc. by the size of value
Grade respectively normally, pays attention to, is abnormal, is serious；R is used respectively1、r2、r3、r4It indicates.It is denoted as set R=(r1, r2, r3, r4), relatively
Corresponding relationship between impairment grade value range and direct current grounding pole integrality grade is as follows:
Work as xmWhen between 0 and 0.2, show that the state of direct current grounding pole is normal condition, index parameter variation fluctuation is minimum and connects
It is bordering on design value；
Work as xmWhen between 0.2 and 0.5, show that the state of direct current grounding pole is attention state, quantity of state variation tendency is set towards separate
Evaluation direction is developed, and the frequency of walkaround inspection should be improved；
Work as xmWhen between 0.5 and 0.7, abnormality, quantity of state is changed greatly, and is substantially more than design value, is arranged inspection in due course
It repairs；
Work as xmWhen between 0.7 and 1, severe conditions, quantity of state is seriously more than design value and fastly close to threshold limit value, should be pacified immediately
It lists and indexes and repairs；
S3, parameter variable weight value: to finger when can not really reflect that direct current grounding pole index parameter deviates normal value for normal power
The deficiency that mark system total evaluation influences carries out variable weight processing to index parameter, and weight vector can be represented by the formula:
[ω(x1), ω (x2), ω (x3)······ω(xn)] (7)
The variable weight value of each index parameter are as follows:
δ is variable weight coefficient in formula, it is contemplated that the substantial deviation of state index parameter will affect the safety of entire direct current grounding pole,
Take δ=0.2, ωm (0)Normal weight for the normal weight of index, each index parameter is as follows:
Electrical test U1Shared weight is 0.301, u under the index system11~u15The normal weight of index is respectively as follows: 0.133,0.169,
0.265,0.235,0.198；
Monitor U on-line2Shared weight is 0.246, u under the index system21~u25The normal weight of index is respectively as follows: 0.183,0.215,
0.163,0.199,0.240；
Walkaround inspection V1Shared weight is 0.234, v under the index system11~v14The normal weight of index is respectively as follows: 0.331,0.350,
0.109,0.210；
O&M situation V2Shared weight is 0.219, v under the index system21~v22The normal weight of index is respectively as follows: 0.245,0.314,
0.441；
S4, the Pair Analysis that index and level status under each index system are calculated using Method of Set Pair Analysis: if index is by n
Parameter composition, and its corresponding state grade is divided into K class, if index xmConstitute set U, U=(x1, x2, x3.....xn), shape
State grade constitutes set R, R=(r1, r2, r3... .rn), M=(U, R) is enabled, then xmIt is as follows with the K member Pair Analysis of k grades of states
Shown in formula:
Then collection can be represented by the formula the K member Pair Analysis ρ of M:
, it is specified that s in above formula1~sK-1For state grade threshold value；amFor the Pair Analysis of index and the 1st grade of state；bmBelong to for index
The Pair Analysis of z+1 grades of states；Specified cmFor the Pair Analysis of index and afterbody state；ωmFor the corresponding weight of index；
S5, according to reliability criterion, it is horizontal to calculate direct current grounding pole holistic health: setting (r1、r2、r3.....rK) it is having for attribute space R
Sequence segmentation column, λ is confidence level；λ=0.65 is defined in the present invention, if in r1>r2>r3.....>rKWhen, i.e., corresponding state grade
When by deteriorating well:
If r1<r2<r3.....<rKWhen, i.e., when corresponding state grade is good by deterioration:
In formula, 1≤k≤K then can determine that corresponding state is at this timeIf any index system is severe conditions, DC earthing
Pole holistic health state is serious；
S6, the direct current grounding pole state grade evaluation criterion according to delimitation, determine the corresponding state grade of direct current grounding pole.
3. a kind of direct current grounding pole method for evaluating state based on Set Pair Analysis according to claim 1, it is characterised in that:
Expert analysis mode specific implementation method in the step S2 are as follows: assuming that each qualitative index is initially scored at 100 points, reference is commented
Price card is quasi-, and expert provides the button of each index quantity of state according to practical tour and report over the years according to personal experience and objective data
Point, the ratio for defining total penalties number and initial score is the opposite degradation for being defined as qualitative index.
4. a kind of direct current grounding pole method for evaluating state based on Set Pair Analysis according to claim 1, it is characterised in that:
If any index system state is serious in the step S4, determine earthing pole integrality be it is serious, otherwise enter step S5.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111948482A (en) * | 2020-08-24 | 2020-11-17 | 西南交通大学 | Grounding electrode frequency sensitivity characteristic test evaluation method considering temperature and soil type |
| CN112768058A (en) * | 2021-01-22 | 2021-05-07 | 武汉大学 | Method and device for processing medical data of metering information type |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103778575A (en) * | 2014-03-04 | 2014-05-07 | 国网浙江宁波市鄞州区供电公司 | Transformer state evaluation method and system |
| CN103913655A (en) * | 2014-03-17 | 2014-07-09 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Direct-current common grounding electrode state monitoring system and state assessment method |
| CN105787648A (en) * | 2016-02-19 | 2016-07-20 | 国网浙江省电力公司金华供电公司 | Distribution transformer health state evaluation method based on real-time operation information |
| WO2018053935A1 (en) * | 2016-09-20 | 2018-03-29 | 西南石油大学 | Failure mode occurrence probability based operating status fuzzy evaluation and prediction method for rotating device |
-
2018
- 2018-06-29 CN CN201810692577.1A patent/CN108960445A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103778575A (en) * | 2014-03-04 | 2014-05-07 | 国网浙江宁波市鄞州区供电公司 | Transformer state evaluation method and system |
| CN103913655A (en) * | 2014-03-17 | 2014-07-09 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Direct-current common grounding electrode state monitoring system and state assessment method |
| CN105787648A (en) * | 2016-02-19 | 2016-07-20 | 国网浙江省电力公司金华供电公司 | Distribution transformer health state evaluation method based on real-time operation information |
| WO2018053935A1 (en) * | 2016-09-20 | 2018-03-29 | 西南石油大学 | Failure mode occurrence probability based operating status fuzzy evaluation and prediction method for rotating device |
Non-Patent Citations (2)
| Title |
|---|
| 廖瑞金: "基于集对分析和证据理论融合的变压器内绝缘状态评估方法", 《高电压技术》 * |
| 廖瑞金等: "基于集对分析方法的电力变压器绝缘状态评估策略", 《电力系统自动化》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111948482A (en) * | 2020-08-24 | 2020-11-17 | 西南交通大学 | Grounding electrode frequency sensitivity characteristic test evaluation method considering temperature and soil type |
| CN111948482B (en) * | 2020-08-24 | 2021-06-29 | 西南交通大学 | Grounding electrode frequency sensitivity characteristic test evaluation method considering temperature and soil type |
| CN112768058A (en) * | 2021-01-22 | 2021-05-07 | 武汉大学 | Method and device for processing medical data of metering information type |
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