CN113313402B - Line state determining method, device, equipment and medium - Google Patents
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Abstract
The embodiment of the invention discloses a line state determining method, device, equipment and medium. The line state determining method comprises the following steps: acquiring a first-level evaluation index set and at least one second-level evaluation index set; according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set, calculating a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index; obtaining a membership matrix of each secondary evaluation index based on a preset index evaluation level set; and determining the state of the line according to the membership matrix, the primary weight value and the secondary weight value. According to the technical scheme provided by the embodiment of the invention, the weight value corresponding to each evaluation index is determined according to the pre-established evaluation index set, and finally the line state is determined according to the weight value and the membership matrix, so that the accuracy of obtaining the line state is improved, and the safe operation of the power transmission line is ensured.
Description
Technical Field
The present invention relates to computer technologies, and in particular, to a method, an apparatus, a device, and a medium for determining a line state.
Background
The transmission line is an important component of the power system, and has the advantages of complex running environment, wide distribution range, high inspection and repair difficulty and high cost, and the safety and stability of the power grid can be seriously affected by faults. Therefore, it is important to effectively evaluate the operation state of the power transmission line.
In the prior art, staff often score each index according to a plurality of preset evaluation indexes and evaluation standards in the inspection process, and finally calculate the total score to realize the evaluation of the line state, but the mode has the problems that index parameters in different specifications are different, index weights are too stiff, the evaluation result is influenced by the inspection mode, and the like, so that the estimated result of the line state is inaccurate.
Disclosure of Invention
The embodiment of the invention provides a line state determining method, device, equipment and medium, which are used for determining weight values corresponding to all evaluation indexes according to a pre-established evaluation index set, and finally determining the line state according to the weight values and a membership matrix, so that the accuracy of obtaining the line state is improved, and the safe operation of a power transmission line is ensured.
In a first aspect, an embodiment of the present invention provides a line status determining method, where the method includes:
Acquiring a first-level evaluation index set and at least one second-level evaluation index set; the first-level evaluation index set comprises at least one first-level evaluation index, one first-level evaluation index corresponds to one second-level evaluation index set, and the second-level evaluation index set comprises at least one second-level evaluation index;
according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set, calculating a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index;
obtaining a membership matrix of each secondary evaluation index based on a preset index evaluation level set;
and determining the state of the line according to the membership matrix, the primary weight value and the secondary weight value.
In a second aspect, an embodiment of the present invention further provides a line status determining apparatus, where the apparatus includes:
the index set acquisition module is used for acquiring a first-level evaluation index set and at least one second-level evaluation index set; the first-level evaluation index set comprises at least one first-level evaluation index, one first-level evaluation index corresponds to one second-level evaluation index set, and the second-level evaluation index set comprises at least one second-level evaluation index;
The weight calculation module is used for calculating a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set;
the membership matrix acquisition module is used for acquiring membership matrixes of the secondary evaluation indexes based on a preset index evaluation level set;
and the line state determining module is used for determining the line state according to the membership matrix, the primary weight value and the secondary weight value.
In a third aspect, an embodiment of the present invention further provides an electronic device, including:
one or more processors;
a memory for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the line status determination method provided by any of the embodiments of the present invention.
In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the line status determination method provided by any embodiment of the present invention.
According to the technical scheme, the first-level evaluation index set and at least one second-level evaluation index set are obtained, the first-level weight value corresponding to each first-level evaluation index and the second-level weight value corresponding to each second-level evaluation index are calculated according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set, the membership matrix of each second-level evaluation index based on the preset index evaluation level set is further obtained, the line state is finally determined according to the membership matrix, the first-level weight value and the second-level weight value, the line state is finally determined according to the weight value and the membership matrix, the accuracy of obtaining the line state is improved, and safe operation of the power transmission line is guaranteed.
Drawings
FIG. 1a is a flow chart of a line status determination method according to a first embodiment of the present invention;
FIG. 1b is a schematic diagram of an evaluation index system according to a first embodiment of the present invention;
FIG. 1c is a schematic diagram of the meaning of a value in a judgment matrix according to an embodiment of the present invention;
fig. 2a is a flow chart of a line status determining method in a second embodiment of the present invention;
FIG. 2b is a schematic diagram showing the association between line status scores and line status in a second embodiment of the present invention;
fig. 3a is a flow chart of a line status determination method in a third embodiment of the present invention;
FIG. 3b is a diagram showing the calculation result of the weight value in the third embodiment of the present invention;
FIG. 3c is a schematic diagram of R.I. value in a third embodiment of the present invention;
fig. 4 is a schematic diagram of a circuit status determining device according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus according to a fifth embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1a is a flowchart of a line status determining method according to a first embodiment of the present invention, where the technical solution of the present embodiment is applicable to a case of determining a line status by a pre-established status evaluation system, and the method may be performed by a line status determining device, which may be implemented by software and/or hardware and may be integrated in various general purpose computer devices. The line state determining method in this embodiment specifically includes the following steps:
Step 110, acquiring a first-level evaluation index set and at least one second-level evaluation index set; the primary evaluation index set comprises at least one primary evaluation index, one primary evaluation index corresponds to one secondary evaluation index set, and the secondary evaluation index set comprises at least one secondary evaluation index.
The first-level evaluation index set is formed by at least one first-level evaluation index, the first-level evaluation index is an index for evaluating the state of the power transmission line, the first-level evaluation index can be an element index related to the running state of the power transmission line, and the first-level evaluation index is an earthing device, a power transmission line channel environment, a power transmission line tower and the like corresponding to the power transmission line.
Each primary evaluation index contained in the primary evaluation index set corresponds to a secondary evaluation index set, the secondary evaluation index set contains at least one secondary evaluation index, specifically, the secondary evaluation index is an index for evaluating the state of the power transmission line, compared with the primary evaluation index, the secondary evaluation index is a finer index, each primary evaluation index can be refined to obtain at least one secondary evaluation index corresponding to the primary evaluation index, the primary evaluation index is an electric transmission line tower A2, and the secondary evaluation index corresponding to the primary evaluation index comprises a tower inclination condition A21, a main material bending condition A22 of an iron tower, a cross arm skew condition A23 of the iron tower, a loss condition A24 of an iron tower component, a stay wire corrosion damage condition A25, a concrete pole crack A26 and the like. Also for example, the first-level evaluation index is a grounding device A6 corresponding to the power transmission line, and the second-level evaluation index corresponding to the first-level evaluation index may include corrosion and damage conditions a61, a ground resistance value a62, a buried depth a63 of the ground lead, and the like.
In this embodiment, when determining the state of the power transmission line, a preset power transmission line state evaluation index system needs to be obtained first, where the power transmission line state evaluation index system includes a first-level evaluation index set and a second-level evaluation index set corresponding to each first-level evaluation index in the first-level evaluation index set, and the state of the power transmission line needs to be determined according to the first-level evaluation index set and the second-level evaluation index set.
Optionally, the first-level evaluation index set includes at least one of a line foundation, a line tower, a ground lead, an insulator string, a hardware, a grounding device, an accessory facility, and a line channel environment.
In this optional embodiment, a specific primary evaluation index included in a primary evaluation index set is provided, as shown in fig. 1b, where the primary evaluation index set included in an evaluation index system includes at least one of a line foundation A1, a line tower A2, a ground lead A3, an insulator string A4, a hardware fitting A5, a grounding device A6, an accessory facility A7, and a line channel environment A8. More specifically, the secondary evaluation indexes corresponding to the line foundation A1 comprise a foundation surface damage condition A11, a foundation surface leakage condition A11, a wire foundation burial depth condition, a foundation slope protection damage condition A12 and a foundation corrosion condition A13; the secondary evaluation indexes corresponding to the line tower A2 comprise a tower inclination condition A21, a main material bending condition A22 of an iron tower, a tower cross arm deflection condition A23, an iron tower component missing, a loosening condition A24, a stay wire rust damage condition A25 and a concrete pole crack A26; the secondary evaluation indexes corresponding to the ground wire A3 comprise broken strands, corrosion conditions A31, foreign matter hanging conditions A32, abnormal galloping, icing conditions A33, sag A34, jumper wire conditions A35, OPGW (Optical FiberComposite Overhead Ground Wire ) and accessory conditions A36 thereof; the secondary evaluation indexes corresponding to the insulator string A4 comprise a rust condition A41 of a steel foot and an iron cap, an end connection condition A42 of a composite insulator, a locking pin defect condition A43, an insulator pollution accumulation condition A44, a composite insulator hydrophobicity A45, an arcing angle and a breakage condition A46 of an equalizing ring; the corresponding secondary evaluation indexes of the hardware fitting A5 comprise hardware fitting abrasion, corrosion, deformation and displacement conditions A51, connection hardware fitting conditions A52, displacement conditions A53 of anti-galloping whips and damping wires, locking pins, spacer bars, a lack condition A54 of heavy weights and a ground wire insulator discharge gap A55; the secondary evaluation indexes corresponding to the grounding device A6 comprise corrosion and damage conditions A61, grounding resistance A62 and grounding body burial depth A63 of the grounding down conductor; the secondary evaluation indexes corresponding to the auxiliary facilities A7 comprise a missing and damaged condition A71 of a tower number plate, a damaged condition A72 of a lightning protection facility, an anti-bird facility, a cat ladder defect, a damaged condition A73 of a guardrail and a damaged condition A74 of an auxiliary communication facility; the secondary evaluation indexes corresponding to the line channel environment A8 comprise crossing distance conditions A81 of various pole lines, trees, constructed roads, bridges and the like on overhead transmission lines, high and large arbor trees A82 planted in the transmission line area, illegal building houses in the channel area and repairing a channel A83 between stay wires.
Step 120, calculating a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set.
The first-level judgment matrix is used for representing the importance degree comparison result between every two first-level evaluation indexes, and can be obtained by searching a plurality of transmission line engineers for a plurality of data and calculating an average value of the plurality of data. It should be noted that, as shown in fig. 1c, a value 1 in the judgment matrix indicates that the importance levels of the two evaluation indexes are the same, a value 3 indicates that the importance level ratio of the former to the latter is 3, the former is slightly more important than the latter, and so on. When the first-level evaluation index set contains 8 first-level evaluation indexes, a first-level judgment matrix h= (A1, A2, A3, A4, A5, A6, A7, A8) can be obtained, wherein A1 represents the importance ratio of the first-level evaluation index in the first-level evaluation index set to other first-level evaluation indexes, and so on.
Specifically, the first-stage judgment matrix H for the 8 first-stage evaluation indexes is as follows:
The matrix elements of the nth row of the matrix respectively represent the ratio of the importance degree of the nth level evaluation index in the first level evaluation index set to the importance degree of each level evaluation index in turn.
The secondary judgment matrix is used for representing the importance degree comparison result between every two secondary evaluation indexes in a secondary evaluation index set, and the acquisition mode of the secondary judgment matrix is the same as that of the primary judgment matrix, and is not repeated here. For example, if the secondary evaluation index set corresponding to the first primary evaluation index in the primary evaluation index set includes 3 secondary evaluation indexes, the secondary judgment matrix corresponding to the secondary evaluation index set at this time is as follows:
the matrix elements of the nth row of the matrix respectively represent the ratio of the importance degree of the nth secondary evaluation index in the secondary evaluation index set to the importance degree of each secondary evaluation index in turn.
In this embodiment, after the primary judgment matrix and the secondary judgment matrix are obtained, the primary weight value corresponding to each primary evaluation index and the secondary weight value corresponding to each secondary evaluation index may be calculated according to the primary judgment matrix and the secondary judgment matrix, and the primary weight and the secondary weight may be determined by using a hierarchical analysis method (Analytic Hierarchy Process, AHP). The first-level weight is the weight of each first-level evaluation index in the first-level evaluation index set, and the second-level weight is the weight of each second-level evaluation index in all second-level evaluation index sets.
For example, the first-level weight of each first-level evaluation index and the second-level intra-group weight of each second-level evaluation index in the second-level evaluation index set where the first-level evaluation index is located may be calculated first, and finally the second-level intra-group weight and the first-level weight of the first-level evaluation index matched with the second-level intra-group weight are multiplied to obtain the second-level weight value. The secondary group weight is different from the secondary weight, the secondary group weight refers to the weight of the secondary evaluation index in the secondary evaluation index set where the secondary evaluation index is located, and the secondary weight refers to the weight of each secondary evaluation index in all secondary evaluation index sets.
And 130, obtaining a membership matrix of each secondary evaluation index based on a preset index evaluation grade set.
The membership matrix is used for representing the probability that one secondary evaluation index belongs to each index evaluation grade, and the membership matrix can be obtained by researching multiple pieces of data obtained by multiple power transmission line engineers and processing the multiple pieces of data. For example, the preset index evaluation level set is e= (excellent, good, general, abnormal, serious), and the probability that the second-level evaluation index belongs to the above 5 index evaluation levels may form a membership matrix.
In this embodiment, in order to determine the line state, it is necessary to further obtain a membership matrix of each secondary evaluation index based on a preset index evaluation level set, and specifically, the probability that one secondary evaluation index belongs to a target index evaluation level is obtained by calculating the ratio of the number of people considering that the secondary evaluation index belongs to the target index evaluation level to the total number of people participating in evaluation in the investigation process.
And 140, determining the state of the line according to the membership matrix, the primary weight value and the secondary weight value.
In this embodiment, the state of the power transmission line is determined together according to the membership matrix, the primary weight value and the secondary weight value. Specifically, a fuzzy comprehensive evaluation method (Fuzzy Hierarchy Comprehensive Evaluation, PCE) is performed on the membership matrix and the secondary weight value to obtain evaluation vectors corresponding to all the first-level evaluation indexes, evaluation scores corresponding to all the first-level evaluation indexes are calculated according to the evaluation vectors corresponding to all the first-level evaluation indexes and scores corresponding to all the index evaluation grades, line state scores are calculated according to the evaluation scores and the first-level weight matrix, and finally line states are determined according to the line state scores.
According to the technical scheme, the first-level evaluation index set and at least one second-level evaluation index set are obtained, the first-level weight value corresponding to each first-level evaluation index and the second-level weight value corresponding to each second-level evaluation index are calculated according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set, the membership matrix of each second-level evaluation index based on the preset index evaluation level set is further obtained, the line state is finally determined according to the membership matrix, the first-level weight value and the second-level weight value, the line state is finally determined according to the weight value and the membership matrix, the accuracy of obtaining the line state is improved, and safe operation of the power transmission line is guaranteed.
Example two
Fig. 2a is a flowchart of a line state determining method in a second embodiment of the present invention, which is further refined based on the foregoing embodiment, and provides specific steps for determining a line state according to a membership matrix, a primary weight value, and a secondary weight value. The following describes a line status determining method according to a second embodiment of the present invention with reference to fig. 2a, including the following steps:
Step 210, acquiring a first-level evaluation index set and at least one second-level evaluation index set; the primary evaluation index set comprises at least one primary evaluation index, one primary evaluation index corresponds to one secondary evaluation index set, and the secondary evaluation index set comprises at least one secondary evaluation index.
Step 220, calculating a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set.
Step 230, obtaining a membership matrix of each secondary evaluation index based on a preset index evaluation level set;
step 240, calculating the evaluation scores corresponding to the first-level evaluation indexes according to the second-level weight values, the membership matrix and the scores corresponding to the preset index evaluation grade sets.
Wherein, the set of preset index evaluation levels is used for providing the evaluation level of each evaluation index, for example, the preset index evaluation level e= (excellent, good, general, abnormal, serious) each level corresponds to a score range, for example, excellent [90, 100], good [80, 90], general [70, 80], abnormal [50, 70], serious [0, 50].
In this embodiment, after the membership matrix is obtained, the evaluation scores corresponding to the first-level evaluation indexes are calculated according to the second-level weight values, the membership matrix and the scores corresponding to the preset index evaluation level sets, specifically, the evaluation vectors are calculated according to the second-level weight values and the membership matrix corresponding to the second-level evaluation indexes, and then the evaluation scores corresponding to the first-level evaluation indexes are calculated according to the evaluation vectors and the scores corresponding to the preset index evaluation level sets.
Optionally, calculating the evaluation score corresponding to each first-level evaluation index according to the second-level weight value, the membership matrix and the score corresponding to the preset index evaluation level set, including:
calculating assessment vectors corresponding to each first-level assessment index according to the second-level weight values and the membership matrix;
and calculating the evaluation scores corresponding to all the first-level evaluation indexes according to the evaluation vectors and the scores corresponding to the preset index evaluation grade sets.
In this optional embodiment, a manner of calculating the evaluation scores corresponding to the first-level evaluation indexes according to the second-level weight values, the membership matrix and the scores corresponding to the preset index evaluation level sets is provided, where the second-level weight values and the membership matrix of each second-level evaluation index pair are multiplied to obtain the evaluation vectors corresponding to the first-level evaluation indexes, and then the evaluation vectors are multiplied to the scores corresponding to the preset index evaluation level sets to calculate the evaluation scores corresponding to the first-level evaluation indexes.
Exemplary, first, the secondary weight value W corresponding to each secondary evaluation index A Multiplying the membership matrix R to obtain an evaluation vector S=W of a first-level evaluation index corresponding to each second-level evaluation index A R, further, the score W' E= [100,90,80,70,50 ] corresponding to the evaluation vector S and the preset index evaluation grade set]Multiplying, and calculating an evaluation score mu=W' ES corresponding to each first-level evaluation index T 。
Step 250, calculating a line state score according to the first-level weight value and the evaluation scores corresponding to the first-level evaluation indexes.
In this embodiment, after the evaluation scores corresponding to the first-level evaluation indexes are obtained by calculation, the line state score is calculated according to the first-level weight value and the evaluation scores corresponding to the first-level evaluation indexes. Specifically, the first-level weight value is adopted to carry out weighted summation on the evaluation scores corresponding to the first-level evaluation indexes, and the line state score is calculated.
For example, the evaluation scores corresponding to 8 primary evaluation indexes are calculated as u= [ μ 1, μ 2, μ 3, μ 4, μ 5, μ 6, μ 7, μ 8], and the final route state scores are as follows:
wherein mu i Is the evaluation value omega corresponding to the first-level evaluation index of the ith item i Is the first-level weight value corresponding to the first-level evaluation index of the ith item.
Step 260, determining the line state according to the evaluation scores corresponding to the first-level evaluation indexes and the line state scores.
In this embodiment, after the line state score is obtained by calculation, the line state may be determined according to the evaluation scores corresponding to the first-level evaluation indexes and the line state score. For example, as shown in fig. 2b, the line state of the current line may be determined directly according to the association relationship between the line state score and the line state, for example, if the line state score is 94.5 points, the line state may be determined to be excellent; also, for example, the line state may be determined according to the line state score and the evaluation score corresponding to each level of evaluation index, for example, the line state score is calculated to be 94.5 points, but the line state may be determined to be good because the score corresponding to the level of evaluation index that is important is lower and is 84 points. Illustratively, a more important indicator is the transmission line basis.
According to the technical scheme, a first-level evaluation index set and at least one second-level evaluation index set are firstly obtained, then a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index are calculated according to a first-level judgment matrix corresponding to each first-level evaluation index set and a second-level judgment matrix corresponding to each second-level evaluation index set, a membership matrix of each second-level evaluation index based on a preset index evaluation grade set is further obtained, evaluation scores corresponding to each first-level evaluation index are calculated according to the second-level weight value, the membership matrix and scores corresponding to the preset index evaluation grade set, finally, a line state score is calculated according to the evaluation scores corresponding to each first-level evaluation index, and the line state score is determined, the accuracy of obtaining the line state is improved according to the weight value and the membership matrix, and the safe operation of the transmission line is guaranteed.
Example III
Fig. 3a is a flowchart of a line status determining method according to a third embodiment of the present invention, which is further refined on the basis of the foregoing embodiment, and provides specific steps of calculating a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index according to a first-level judgment matrix corresponding to a first-level evaluation index set and a second-level judgment matrix corresponding to each second-level evaluation index set. A method for determining a line status according to a third embodiment of the present invention is described below with reference to fig. 3a, and includes the following steps:
step 310, acquiring a first-level evaluation index set and at least one second-level evaluation index set; the primary evaluation index set comprises at least one primary evaluation index, one primary evaluation index corresponds to one secondary evaluation index set, and the secondary evaluation index set comprises at least one secondary evaluation index.
Step 320, calculating a first-level weight value corresponding to each first-level evaluation index according to the first-level judgment matrix.
In this embodiment, a manner of calculating a first-stage weight value corresponding to each first-stage evaluation index according to a first-stage judgment matrix is provided, and the specific calculation manner is as follows:
Wherein n is the order of the first-level judgment matrix, a ij Is the matrix element of the ith row and the jth column in the first-level judgment matrix.
And 330, calculating the weight value in the secondary group corresponding to each secondary evaluation index according to the secondary judgment matrix.
In this embodiment, a method for calculating a weight value W in a secondary group corresponding to each secondary evaluation index according to a secondary judgment matrix is provided ij The calculation mode is the same as the first-level weight value, and is changed to the calculation by using a second-level judgment matrix, which is not described herein.
And 340, calculating the secondary weight value corresponding to each secondary evaluation index according to the primary weight value and the weight value in the secondary group.
In this embodiment, a manner of calculating a secondary weight value corresponding to each secondary evaluation index according to a primary weight value and a secondary weight value in a secondary group is provided, specifically, the secondary weight value in the secondary group is multiplied by the corresponding primary weight value to obtain the secondary weight value corresponding to the secondary evaluation index.
For example, as shown in fig. 3b, the first-level evaluation index A1 corresponds to two second-level evaluation indexes a11 and a12, and then the second-level weight value of the second-level evaluation index a11 may be obtained by multiplying the first-level weight value of the first-level evaluation index A1 and the second-level intra-group weight value of the second-level evaluation index a 11.
Optionally, before calculating the primary weight value corresponding to each primary evaluation index and the secondary weight value corresponding to each secondary evaluation index, the method further includes:
establishing a first-stage judgment matrix according to the ratio of two important degrees between each first-stage evaluation index in the first-stage evaluation index set;
and establishing a secondary judgment matrix according to the ratio of two important degrees between the secondary evaluation indexes in the secondary evaluation index set.
In this optional embodiment, a calculation method for a first-stage judgment matrix and a second-stage judgment matrix is provided, specifically, the first-stage judgment matrix is established according to a ratio of two important degrees between each first-stage evaluation index in the first-stage evaluation index set, and the second-stage judgment matrix is established according to a ratio of two important degrees between each second-stage evaluation index in the second-stage evaluation index set.
Optionally, after calculating the primary weight value corresponding to each primary evaluation index and the secondary weight value corresponding to each secondary evaluation index, the method further includes:
according to the first-level judgment matrix, the second-level judgment matrix, the first-level weight value and the second-level weight value, calculating the random consistency ratio of the first-level judgment matrix and the second-level judgment matrix;
when the value of the random consistency ratio is larger than the set judgment threshold value, correcting the primary judgment matrix and the secondary judgment matrix, and returning to execute calculation of the primary weight value corresponding to each primary evaluation index and the secondary weight value corresponding to each secondary evaluation index.
In this alternative embodiment, the key premise of determining the index weight by using the AHP method is that engineers have consistency in determining the relative importance of each index, so it is necessary to perform consistency check on the determination matrix. The consistency check is related to two consistency indexes of C.I. and C.R. as follows:
wherein c.i. is a general consistency index of the judgment matrix; lambda (lambda) max In order to judge the maximum characteristic root of the matrix, n is the number of evaluation indexes, R.I. is the value of the average random consistency index corresponding to n, the value of R.I. is shown in figure 3c, and C.R. represents the random consistency ratio of the judgment matrix.
When the C.R. is smaller than 0.1, the calculated primary weight value and secondary weight value can be normally used for calculating the line state score, otherwise, the judgment matrix is required to be corrected, and the primary weight value and the secondary weight value are recalculated.
And 350, obtaining a membership matrix of each secondary evaluation index based on a preset index evaluation grade set.
Step 360, determining the line state according to the membership matrix, the primary weight value and the secondary weight value.
According to the technical scheme, a first-level evaluation index set and at least one second-level evaluation index set are firstly obtained, then a first-level weight value corresponding to each first-level evaluation index is calculated according to a first-level judgment matrix, a second-level intra-group weight value corresponding to each second-level evaluation index is calculated according to a second-level judgment matrix, a second-level weight value corresponding to each second-level evaluation index is calculated according to the first-level weight value and the second-level intra-group weight value, and then a membership matrix of each second-level evaluation index based on a preset index evaluation level set is obtained, and finally a line state is determined according to the membership matrix, the first-level weight value and the second-level weight value, the weight value corresponding to each evaluation index is determined according to a pre-established evaluation index system, and finally the line state is determined according to the weight value and the membership matrix, so that the accuracy of obtaining the line state is improved, and the safe operation of a power transmission line is ensured.
Example IV
Fig. 4 is a schematic structural diagram of a line status determining device according to a fourth embodiment of the present invention, where the line status determining device includes: an index set acquisition module 410, a weight calculation module 420, a membership matrix acquisition module 430, and a line status determination module 440.
An index set acquisition module 410, configured to acquire a primary evaluation index set and at least one secondary evaluation index set; the first-level evaluation index set comprises at least one first-level evaluation index, one first-level evaluation index corresponds to one second-level evaluation index set, and the second-level evaluation index set comprises at least one second-level evaluation index;
the weight calculation module 420 is configured to calculate a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set;
a membership matrix obtaining module 430, configured to obtain a membership matrix of each secondary evaluation index based on a preset index evaluation level set;
the line state determining module 440 is configured to determine the line state according to the membership matrix, the primary weight value, and the secondary weight value.
According to the technical scheme, the first-level evaluation index set and at least one second-level evaluation index set are obtained, the first-level weight value corresponding to each first-level evaluation index and the second-level weight value corresponding to each second-level evaluation index are calculated according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set, the membership matrix of each second-level evaluation index based on the preset index evaluation level set is further obtained, the line state is finally determined according to the membership matrix, the first-level weight value and the second-level weight value, the line state is finally determined according to the weight value and the membership matrix, the accuracy of obtaining the line state is improved, and safe operation of the power transmission line is guaranteed.
Optionally, the weight calculation module 420 includes:
the first weight calculation unit is used for calculating a first-level weight value corresponding to each first-level evaluation index according to the first-level judgment matrix;
the second weight calculation unit is used for calculating weight values in the second-level groups corresponding to the second-level evaluation indexes according to the second-level judgment matrix;
And the third weight calculation unit is used for calculating the secondary weight value corresponding to each secondary evaluation index according to the primary weight value and the weight value in the secondary group.
Optionally, the line status determining module 440 includes:
the evaluation score calculating unit is used for calculating the evaluation scores corresponding to all the first-level evaluation indexes according to the second-level weight values, the membership matrix and the scores corresponding to the preset index evaluation grade sets;
the line state score calculating unit is used for calculating the line state score according to the first-level weight value and the evaluation scores corresponding to the first-level evaluation indexes;
and the line state determining unit is used for determining the line state according to the evaluation scores corresponding to the first-level evaluation indexes and the line state scores.
Optionally, the evaluation value calculating unit is specifically configured to:
calculating an assessment vector corresponding to each first-level assessment index according to the second-level weight value and the membership matrix;
and calculating the evaluation scores corresponding to all the first-level evaluation indexes according to the evaluation vectors and the scores corresponding to the preset index evaluation grade sets.
Optionally, the line state determining device further includes:
The ratio calculation module is used for calculating the random consistency ratio of the first-level judgment matrix and the second-level judgment matrix according to the first-level judgment matrix, the second-level judgment matrix, the first-level weight value and the second-level weight value after calculating the first-level weight value corresponding to each first-level evaluation index and the second-level weight value corresponding to each second-level evaluation index;
and the judgment matrix correction module is used for correcting the primary judgment matrix and the secondary judgment matrix when the value of the random consistency ratio is larger than a set judgment threshold value, and returning to execute the calculation of the primary weight value corresponding to each primary evaluation index and the secondary weight value corresponding to each secondary evaluation index.
Optionally, the line state determining device further includes:
the first-level judgment matrix establishing module is used for establishing a first-level judgment matrix according to the ratio of two important degrees between the first-level evaluation indexes in the first-level evaluation index set before calculating the first-level weight value corresponding to each first-level evaluation index and the second-level weight value corresponding to each second-level evaluation index;
the secondary judgment matrix establishing module is used for establishing a secondary judgment matrix according to the ratio of the two important degrees between the secondary evaluation indexes in the secondary evaluation index set.
Optionally, the first-level evaluation index set includes at least one of a line foundation, a line tower, a ground wire, an insulator string, a hardware fitting, a grounding device, an accessory facility and a line channel environment.
The line state determining device provided by the embodiment of the invention can execute the line state determining method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the executing method.
Example five
Fig. 5 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present invention, as shown in fig. 5, the electronic device includes a processor 50, a memory 51, an input device 52 and an output device 53; the number of processors 50 in the device may be one or more, one processor 50 being taken as an example in fig. 5; the processor 50, the memory 51, the input means 52 and the output means 53 in the device may be connected by a bus or by other means, in fig. 5 by way of example.
The memory 51 is a computer readable storage medium, and may be used to store a software program, a computer executable program, and modules, such as program instructions/modules corresponding to the line status determining method in the embodiment of the present invention (for example, the index set obtaining module 410, the weight calculating module 420, the membership matrix obtaining module 430, and the line status determining module 440 in the line status determining device). The processor 50 executes various functional applications of the device and data processing by executing software programs, instructions and modules stored in the memory 51, i.e. implements the line status determination method described above, comprising:
Acquiring a first-level evaluation index set and at least one second-level evaluation index set; the first-level evaluation index set comprises at least one first-level evaluation index, one first-level evaluation index corresponds to one second-level evaluation index set, and the second-level evaluation index set comprises at least one second-level evaluation index;
according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set, calculating a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index;
obtaining a membership matrix of each secondary evaluation index based on a preset index evaluation level set;
and determining the state of the line according to the membership matrix, the primary weight value and the secondary weight value.
The memory 51 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for functions; the storage data area may store data created according to the use of the terminal, etc. In addition, memory 51 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 51 may further include memory located remotely from processor 50, which may be connected to the device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Example six
A sixth embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program for performing a line status determination method when executed by a computer processor, the method comprising:
acquiring a first-level evaluation index set and at least one second-level evaluation index set; the first-level evaluation index set comprises at least one first-level evaluation index, one first-level evaluation index corresponds to one second-level evaluation index set, and the second-level evaluation index set comprises at least one second-level evaluation index;
according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set, calculating a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index;
obtaining a membership matrix of each secondary evaluation index based on a preset index evaluation level set;
and determining the state of the line according to the membership matrix, the primary weight value and the secondary weight value.
Of course, the storage medium provided by the embodiments of the present invention and including the computer executable instructions is not limited to the method operations described above, and may also perform the related operations in the line status determination method provided by any of the embodiments of the present invention.
From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, etc., and include several instructions for causing a computer device (which may be a personal computer, an application server, or a network device, etc.) to execute the method according to the embodiments of the present invention.
It should be noted that, in the above-mentioned embodiment of the line status determining device, each unit and module included are only divided according to the functional logic, but not limited to the above-mentioned division, so long as the corresponding functions can be implemented; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. A line status determining method, comprising:
acquiring a first-level evaluation index set and at least one second-level evaluation index set; the first-level evaluation index set comprises at least one first-level evaluation index, one first-level evaluation index corresponds to one second-level evaluation index set, and the second-level evaluation index set comprises at least one second-level evaluation index;
according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set, calculating a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index;
Obtaining a membership matrix of each secondary evaluation index based on a preset index evaluation level set;
determining a line state according to the membership matrix, the primary weight value and the secondary weight value;
determining a line state according to the membership matrix, the primary weight value and the secondary weight value, including:
calculating the evaluation scores corresponding to all the first-level evaluation indexes according to the second-level weight values, the membership matrix and the scores corresponding to the preset index evaluation grade sets;
calculating a line state score according to the first-level weight value and the evaluation scores corresponding to the first-level evaluation indexes;
determining a line state according to the evaluation scores corresponding to the first-level evaluation indexes and the line state scores;
the first-level evaluation index set comprises at least one of a circuit foundation, a circuit tower, a ground wire, an insulator string, hardware, a grounding device, an accessory facility and a circuit channel environment;
wherein, the calculating the line state score according to the first-level weight value and the evaluation scores corresponding to the first-level evaluation indexes includes:
the final route state score is calculated using the following formula:
Wherein Y is the final line status score, μ i Is the evaluation value omega corresponding to the first-level evaluation index of the ith item i Is the first-level weight value corresponding to the first-level evaluation index of the ith item.
2. The method of claim 1, wherein calculating a primary weight value for each primary evaluation index and a secondary weight value for each secondary evaluation index based on the primary judgment matrix corresponding to the primary evaluation index set and the secondary judgment matrix corresponding to each secondary evaluation index set comprises:
according to the first-level judgment matrix, calculating a first-level weight value corresponding to each first-level evaluation index;
according to the secondary judgment matrix, calculating a weight value in a secondary group corresponding to each secondary evaluation index;
and calculating a secondary weight value corresponding to each secondary evaluation index according to the primary weight value and the weight value in the secondary group.
3. The method of claim 1, wherein calculating the evaluation score corresponding to each primary evaluation index according to the secondary weight value, the membership matrix, and the score corresponding to the set of preset index evaluation grades comprises:
calculating an assessment vector corresponding to each first-level assessment index according to the second-level weight value and the membership matrix;
And calculating the evaluation scores corresponding to all the first-level evaluation indexes according to the evaluation vectors and the scores corresponding to the preset index evaluation grade sets.
4. The method according to claim 1, further comprising, after calculating the primary weight value corresponding to each primary evaluation index and the secondary weight value corresponding to each secondary evaluation index:
calculating the random consistency ratio of the primary judgment matrix and the secondary judgment matrix according to the primary judgment matrix, the secondary judgment matrix, the primary weight value and the secondary weight value;
when the value of the random consistency ratio is larger than a set judgment threshold value, correcting the primary judgment matrix and the secondary judgment matrix, and returning to execute calculation of a primary weight value corresponding to each primary evaluation index and a secondary weight value corresponding to each secondary evaluation index.
5. The method of claim 1, further comprising, prior to calculating the primary weight value for each primary evaluation index and the secondary weight value for each secondary evaluation index:
establishing a first-stage judgment matrix according to the ratio of two important degrees between each first-stage evaluation index in the first-stage evaluation index set;
And establishing a secondary judgment matrix according to the ratio of two important degrees between the secondary evaluation indexes in the secondary evaluation index set.
6. A line status determining apparatus, comprising:
the index set acquisition module is used for acquiring a first-level evaluation index set and at least one second-level evaluation index set; the first-level evaluation index set comprises at least one first-level evaluation index, one first-level evaluation index corresponds to one second-level evaluation index set, and the second-level evaluation index set comprises at least one second-level evaluation index;
the weight calculation module is used for calculating a first-level weight value corresponding to each first-level evaluation index and a second-level weight value corresponding to each second-level evaluation index according to the first-level judgment matrix corresponding to the first-level evaluation index set and the second-level judgment matrix corresponding to each second-level evaluation index set;
the membership matrix acquisition module is used for acquiring membership matrixes of the secondary evaluation indexes based on a preset index evaluation level set;
the line state determining module is used for determining the line state according to the membership matrix, the primary weight value and the secondary weight value;
the line state determining module includes:
The evaluation score calculating unit is used for calculating the evaluation scores corresponding to all the first-level evaluation indexes according to the second-level weight values, the membership matrix and the scores corresponding to the preset index evaluation grade sets;
the line state score calculating unit is used for calculating the line state score according to the first-level weight value and the evaluation scores corresponding to the first-level evaluation indexes;
the line state determining unit is used for determining the line state according to the evaluation scores corresponding to the first-level evaluation indexes and the line state scores;
the first-level evaluation index set comprises at least one of a circuit foundation, a circuit tower, a ground wire, an insulator string, hardware, a grounding device, an accessory facility and a circuit channel environment;
the line state score calculating unit is specifically configured to:
the final route state score is calculated using the following formula:
wherein Y is the final line status score, μ i Is the evaluation value omega corresponding to the first-level evaluation index of the ith item i Is the first-level weight value corresponding to the first-level evaluation index of the ith item.
7. An electronic device, the device comprising:
one or more processors;
A memory for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the line status determination method of any of claims 1-5.
8. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the line status determination method according to any one of claims 1-5.
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