CN112036710B - A method, system, storage medium and device for evaluating composite state of high voltage cable - Google Patents
A method, system, storage medium and device for evaluating composite state of high voltage cable Download PDFInfo
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Abstract
The invention relates to a high-voltage cable composite state evaluation method, a system, a storage medium and equipment, wherein the method comprises the steps of acquiring historical data information of a cable to be evaluated, mining risk factors and characterization features, generating effective feature information and constructing state core characterization feature information; and establishing a cable composite state evaluation model, performing composite state evaluation on the cable to be evaluated, and finally determining a cable evaluation result. According to the invention, through mining the risk factors and the characterization features of the historical data information, constructing the state core characterization feature information and then carrying out composite state evaluation, the cable evaluation result is obtained, the accurate evaluation of the cable state is realized, the data comparison and diagnosis basis can be provided for the live detection and the on-line monitoring result analysis of the high-voltage cable circuit, the comprehensive improvement of the state detection and evaluation level of the cable circuit, the on-site state detection work support and the guarantee of the safe, stable and reliable operation of the high-voltage cable circuit are facilitated.
Description
Technical Field
The invention relates to the technical field of high-voltage cable fault on-line detection and identification, in particular to a high-voltage cable composite state evaluation method, a system, a storage medium and equipment.
Background
The high-voltage cable laying path is wide in distribution, complex in operation condition, easy to damage and destroy by external force, uneven in accessory installation quality and large in inspection maintenance workload. With the continued expansion of the cable size,
The operation and maintenance management difficulty of the cable line is gradually increased, and in addition, the fault frequency of the power cable line is increased in recent years, so that the safe operation of the power grid faces a serious challenge. In order to solve the increasingly prominent difficult problems of operation and maintenance of the cable lines, state power grid companies are actively pushing state maintenance work of power transmission and transformation equipment, strengthening detection and analysis of the running state of the power grid, timely finding and eliminating hidden trouble and defects of the equipment, and providing higher requirements for state quantity detection, monitoring and comprehensive diagnosis and evaluation of the cable equipment.
In order to accurately grasp the running condition of the high-voltage cable line, higher requirements are put forward on the state evaluation analysis of the high-voltage cable. At present, the system state evaluation mainly has the following difficulties: the method comprises the following steps of (1) fewer fault cases and fewer fault-related monitoring data; (2) The monitoring data, the standing book data and the detection data lack a unified management platform; (3) a lack of state-evaluation composite feature parameter sets; (4) A single evaluation model is difficult to cope with the characteristics of multi-stage development of the cable.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-voltage cable composite state evaluation method, a system, a storage medium and equipment aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows: a high-voltage cable composite state evaluation method comprises the following steps:
acquiring historical data information of a cable to be evaluated, mining risk factors and characterization features of the historical data information according to a rough set theory, generating effective feature information, and constructing state core characterization feature information;
establishing a cable composite state evaluation model, performing composite state evaluation on the cable to be evaluated to obtain a cable composite state evaluation result, and determining the cable evaluation result according to the cable composite state evaluation result.
The beneficial effects of the invention are as follows: according to the high-voltage cable composite state evaluation method, the risk factors and the characterization features are mined on the historical data information to generate the effective feature information, the state core characterization feature information is constructed, the composite state evaluation is carried out by the cable composite state evaluation model to obtain the cable composite state evaluation result, the cable evaluation result is further determined, the cable state accurate evaluation is realized, the data comparison and the diagnosis basis can be provided for the high-voltage cable circuit live detection and the on-line monitoring result analysis, the comprehensive improvement of the state detection and evaluation level of the cable circuit is facilitated, the on-site state detection work is supported, and the safe, stable and reliable operation of the high-voltage cable circuit is ensured.
Based on the technical scheme, the invention can also be improved as follows:
further: the step of obtaining the historical data information of the cable to be evaluated comprises the following steps: inquiring cable fault historical data information, cable ledger information, cable office discharge industrial site data information and severe line detection data information;
the state core characterization feature information includes: partial discharge characteristic information, dielectric loss characteristic information, sheath circulation characteristic information and temperature characteristic information.
The beneficial effects of the above-mentioned further scheme are: by acquiring the cable fault historical data information, the cable ledger information, the cable partial discharge industrial field data information and the severe line detection data information, the historical data information can be subjected to dangerous factor and characterization feature mining by combining with a rough set theory, and effective feature information can be accurately extracted, so that state core characterization feature information construction is completed.
Further: the method for establishing the cable composite state evaluation model and evaluating the composite state of the cable to be evaluated specifically comprises the following steps:
Establishing a cable composite state evaluation model, and determining evaluation parameters according to the partial discharge characteristic information, the dielectric loss characteristic information, the sheath circulation characteristic information and the temperature characteristic information;
Respectively evaluating the partial discharge characteristic information, the sheath circulation characteristic information, the dielectric loss characteristic information and the temperature characteristic information according to preset corresponding evaluation standards, and respectively determining cable ageing type information, cable sheath characteristic information, cable dielectric loss type information and cable temperature characteristic information;
determining a cable evaluation value according to the cable ageing type information, the cable sheath characteristic information, the cable dielectric loss type information and the cable temperature characteristic information and the corresponding preset weights;
Comparing the cable evaluation value with a preset evaluation comparison table to generate a cable composite state evaluation result;
And inputting the cable composite state evaluation result into the cable composite state evaluation model to obtain a cable evaluation result.
The beneficial effects of the above-mentioned further scheme are: through the partial discharge characteristic information, the dielectric loss characteristic information, the sheath circulation characteristic information, the temperature characteristic information and the corresponding evaluation standard, the cable aging type information, the cable sheath characteristic information, the cable dielectric loss type information and the cable temperature characteristic information can be conveniently and correspondingly determined respectively, and accordingly the pre-allocated weight chunky cable evaluation value can be combined, the cable composite state evaluation result can be conveniently obtained, and the cable evaluation result can be further determined.
Further: comparing the cable evaluation value with a preset evaluation comparison table to generate a cable composite state evaluation result, wherein the cable composite state evaluation result specifically comprises the following steps of:
comparing the cable assessment score with a preset lowest assessment score;
if the cable evaluation value is lower than the preset lowest evaluation threshold value, determining that the cable composite state evaluation result is serious, and generating immediate overhaul prompt information;
Otherwise, respectively determining weight vectors of the cable ageing type information, the cable sheath characteristic information, the cable dielectric loss type information and the cable temperature characteristic information, and carrying out comprehensive state evaluation to obtain a cable composite state evaluation result.
The beneficial effects of the above-mentioned further scheme are: by comparing the cable evaluation value with a preset minimum evaluation threshold value, whether the cable meets the minimum evaluation requirement or not can be determined, and when the cable does not meet the low evaluation requirement, the cable composite state evaluation result is determined to be serious, inspection staff is prompted to overhaul in time, and comprehensive state evaluation is further performed when the cable meets the low evaluation requirement, so that the cable composite state evaluation result is accurately obtained.
Further: the weight vector for respectively determining the cable ageing type information, the cable sheath characteristic information, the cable dielectric loss type information and the cable temperature characteristic information and carrying out comprehensive state evaluation specifically comprises the following steps:
Establishing a state evaluation index system according to the partial discharge characteristic information, the sheath circulation characteristic information, the dielectric loss characteristic information and the temperature characteristic information;
Constructing a judgment matrix by using a 1-9 scale method, and determining weight grades of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index quantity system according to the judgment matrix;
Calculating single-order weight vectors and carrying out consistency check according to weight grades of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index amount system respectively, and calculating total-order weight vectors and carrying out consistency check to obtain weight vectors of all parameters in the target layer, the criterion layer and the scheme layer in the state evaluation index amount system;
And carrying out comprehensive state evaluation according to the cable evaluation value and weight vectors of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index quantity system to obtain a cable composite state evaluation result.
The beneficial effects of the above-mentioned further scheme are: the state evaluation index quantity system is established, the weight grade of each parameter in the target layer, the criterion layer and the scheme layer is determined, and then the cable composite state evaluation result can be accurately obtained through comprehensive state evaluation according to the weight grade of each parameter in the target layer, the criterion layer and the scheme layer.
Further: the cable evaluation result obtaining method specifically comprises the following steps:
And sequentially inputting the cable composite state evaluation result into a plurality of stage sub-models of the cable composite state evaluation model, comparing the cable composite state evaluation result with a threshold value of a corresponding stage sub-model, and determining the cable evaluation result according to the comparison result.
The beneficial effects of the above-mentioned further scheme are: the cable composite state evaluation results are sequentially compared with the threshold values of the corresponding stage sub-models through the plurality of stage sub-models in the cable composite state evaluation model, so that the cable evaluation results of different cables can be determined in stages, and the evaluation results are more accurate.
Further: the method further comprises the steps of:
And dynamically feeding back and adjusting the evaluation parameters in the cable composite state evaluation model according to the cable composite state evaluation result and the core characterization characteristic information.
The beneficial effects of the above-mentioned further scheme are: by feeding back the cable composite state evaluation result and the core characterization characteristic information to the cable composite state evaluation model, the evaluation parameters in the cable composite state evaluation model can be dynamically adjusted, so that the evaluation result is more accurate.
The high-voltage cable composite state evaluation system comprises a feature mining construction module and a composite state evaluation module;
the characteristic mining construction module is used for acquiring historical data information of the cable to be evaluated, mining the dangerous factors and the characterization characteristics of the historical data information according to a rough set theory, generating effective characteristic information and constructing state core characterization characteristic information;
The composite state evaluation module is used for establishing a cable composite state evaluation model, performing composite state evaluation on the cable to be evaluated to obtain a cable composite state evaluation result, and determining a cable evaluation result according to the cable composite state evaluation result.
According to the high-voltage cable composite state evaluation system, the risk factors and the characterization features are mined on the historical data information to generate the effective feature information, the state core characterization feature information is constructed, the composite state evaluation is carried out by the cable composite state evaluation model to obtain the cable composite state evaluation result, the cable evaluation result is further determined, the cable state accurate evaluation is realized, the data comparison and the diagnosis basis can be provided for the high-voltage cable circuit live detection and the on-line monitoring result analysis, the comprehensive improvement of the state detection and evaluation level of the cable circuit is facilitated, the on-site state detection work is supported, and the safe, stable and reliable operation of the high-voltage cable circuit is ensured.
The invention also provides a computer readable storage medium storing a computer program which, when executed by a processor, implements the method.
The invention also provides high-voltage cable composite state evaluation equipment, which comprises the storage medium and a processor, wherein the processor realizes the steps of the method when executing the computer program on the storage medium.
Drawings
FIG. 1 is a flow chart of a method for evaluating a composite state of a high-voltage cable according to an embodiment of the invention;
fig. 2 is a block diagram of a high-voltage cable composite state evaluation system according to an embodiment of the present invention.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1, a method for evaluating a composite state of a high-voltage cable includes the following steps:
Step 11: acquiring historical data information of a cable to be evaluated, mining risk factors and characterization features of the historical data information according to a rough set theory, generating effective feature information, and constructing state core characterization feature information;
Step 12: establishing a cable composite state evaluation model, performing composite state evaluation on the cable to be evaluated to obtain a cable composite state evaluation result, and determining the cable evaluation result according to the cable composite state evaluation result.
According to the high-voltage cable composite state evaluation method, the risk factors and the characterization features are mined on the historical data information to generate the effective feature information, the state core characterization feature information is constructed, the composite state evaluation is carried out by the cable composite state evaluation model to obtain the cable composite state evaluation result, the cable evaluation result is further determined, the cable state accurate evaluation is realized, the data comparison and the diagnosis basis can be provided for the high-voltage cable circuit live detection and the on-line monitoring result analysis, the comprehensive improvement of the state detection and evaluation level of the cable circuit is facilitated, the on-site state detection work is supported, and the safe, stable and reliable operation of the high-voltage cable circuit is ensured.
In one or more embodiments of the present invention, the acquiring the historical data information of the cable to be evaluated includes: inquiring cable fault historical data information, cable ledger information, cable office discharge industrial site data information and severe line detection data information;
the state core characterization feature information includes: partial discharge characteristic information, dielectric loss characteristic information, sheath circulation characteristic information and temperature characteristic information.
By acquiring the cable fault historical data information, the cable ledger information, the cable partial discharge industrial field data information and the severe line detection data information, the historical data information can be subjected to dangerous factor and characterization feature mining by combining with a rough set theory, and effective feature information can be accurately extracted, so that state core characterization feature information construction is completed.
In one or more embodiments of the present invention, the establishing a cable composite state evaluation model and performing composite state evaluation on a cable to be evaluated specifically includes the following steps:
Step 21, establishing a cable composite state evaluation model, and determining evaluation parameters according to the partial discharge characteristic information, dielectric loss characteristic information, sheath circulation characteristic information and temperature characteristic information;
Step 22, evaluating the partial discharge characteristic information, the sheath circulation characteristic information, the dielectric loss characteristic information and the temperature characteristic information according to preset corresponding evaluation standards, and determining cable aging type information, cable sheath characteristic information, cable dielectric loss type information and cable temperature characteristic information respectively;
Specifically, the partial discharge characteristic information is evaluated according to a partial discharge parameter evaluation standard DL/T1575-2016, and the cable aging type information is determined, wherein the cable aging type information at least comprises three types of unaged, slightly aged and severely aged; evaluating the sheath circulation characteristic information according to a sheath circulation parameter evaluation standard Q/GDW 11223-2014 to determine cable sheath characteristic information, wherein the cable sheath characteristic information at least comprises three types of normal, attention and defect; evaluating the dielectric loss characteristic information according to a dielectric loss parameter evaluation standard GB/T2951.9-1997, and determining cable dielectric loss type information, wherein the cable dielectric loss type information comprises at least three types of good, warning and serious; the temperature characteristic information is evaluated according to temperature parameter evaluation standards IEC 60287 and Q/GDW 456-2010, and the cable temperature characteristic information is determined, wherein the information comprises at least four types of normal, attention, abnormal and serious.
Step 23, carrying out linear superposition according to the cable aging type information, the cable sheath characteristic information, the cable dielectric loss type information, the cable temperature characteristic information and the corresponding preset weights to determine a cable evaluation value;
step 24, comparing the cable evaluation value with a preset evaluation comparison table to generate a cable composite state evaluation result;
And 25, inputting the cable composite state evaluation result into the cable composite state evaluation model to obtain a cable evaluation result.
Through the partial discharge characteristic information, the dielectric loss characteristic information, the sheath circulation characteristic information, the temperature characteristic information and the corresponding evaluation standard, the cable aging type information, the cable sheath characteristic information, the cable dielectric loss type information and the cable temperature characteristic information can be conveniently and correspondingly determined respectively, and accordingly the pre-allocated weight chunky cable evaluation value can be combined, the cable composite state evaluation result can be conveniently obtained, and the cable evaluation result can be further determined.
In one or more embodiments of the present invention, the step of comparing the cable evaluation score with a preset evaluation reference table to generate a cable composite state evaluation result specifically includes the following steps:
comparing the cable assessment score with a preset lowest assessment score;
if the cable evaluation value is lower than the preset lowest evaluation threshold value, determining that the cable composite state evaluation result is serious, and generating immediate overhaul prompt information;
Otherwise, respectively determining weight vectors of the cable ageing type information, the cable sheath characteristic information, the cable dielectric loss type information and the cable temperature characteristic information, and carrying out comprehensive state evaluation to obtain a cable composite state evaluation result.
By comparing the cable evaluation value with a preset minimum evaluation threshold value, whether the cable meets the minimum evaluation requirement or not can be determined, and when the cable does not meet the low evaluation requirement, the cable composite state evaluation result is determined to be serious, inspection staff is prompted to overhaul in time, and comprehensive state evaluation is further performed when the cable meets the low evaluation requirement, so that the cable composite state evaluation result is accurately obtained.
In one or more embodiments of the present invention, the determining weight vectors of the cable aging type information, the cable sheath property information, the cable dielectric loss type information and the cable temperature property information, respectively, and performing the comprehensive state evaluation specifically includes the following steps:
step 31: establishing a state evaluation index system according to the partial discharge characteristic information, the sheath circulation characteristic information, the dielectric loss characteristic information and the temperature characteristic information;
Step 32: constructing a judgment matrix by using a 1-9 scale method, and determining weight grades of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index quantity system according to the judgment matrix;
Step 33: calculating single-order weight vectors and carrying out consistency check according to weight grades of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index amount system respectively, and calculating total-order weight vectors and carrying out consistency check to obtain weight vectors of all parameters in the target layer, the criterion layer and the scheme layer in the state evaluation index amount system;
step 34: and carrying out comprehensive state evaluation according to the cable evaluation value and weight vectors of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index quantity system to obtain a cable composite state evaluation result.
The state evaluation index quantity system is established, the weight grade of each parameter in the target layer, the criterion layer and the scheme layer is determined, and then the cable composite state evaluation result can be accurately obtained through comprehensive state evaluation according to the weight grade of each parameter in the target layer, the criterion layer and the scheme layer.
In one or more embodiments of the present invention, the obtaining the cable evaluation result specifically includes the following steps:
Step 41: and sequentially inputting the cable composite state evaluation result into a plurality of stage sub-models of the cable composite state evaluation model, comparing the cable composite state evaluation result with a threshold value of a corresponding stage sub-model, and determining the cable evaluation result according to the comparison result.
Step 42: the cable composite state evaluation results are sequentially compared with the threshold values of the corresponding stage sub-models through the plurality of stage sub-models in the cable composite state evaluation model, so that the cable evaluation results of different cables can be determined in stages, and the evaluation results are more accurate.
In the embodiment of the invention, the cable composite state evaluation model comprises three stage sub-models, and each stage model is respectively provided with a threshold value;
firstly, inputting all cable composite state evaluation results into a first stage sub-model, wherein cables with evaluation results lower than a threshold value corresponding to the first stage sub-model are cables needing attention;
Secondly, inputting a cable composite state evaluation result of the cable needing attention into the second stage submodel, wherein the cable with the evaluation result lower than the threshold value corresponding to the second stage submodel is the cable needing attention;
And finally, inputting cable data which need to be focused into the third-stage sub-model, wherein the cable with the evaluation result lower than the threshold value corresponding to the third-stage sub-model is a critical cable, so that all cable evaluation results are finally obtained.
Optionally, in one or more embodiments of the present invention, the method further comprises the steps of:
And dynamically feeding back and adjusting the evaluation parameters in the cable composite state evaluation model according to the cable composite state evaluation result and the core characterization characteristic information.
By feeding back the cable composite state evaluation result and the core characterization characteristic information to the cable composite state evaluation model, the evaluation parameters in the cable composite state evaluation model can be dynamically adjusted, so that the evaluation result is more accurate.
As shown in fig. 2, the high-voltage cable composite state evaluation system of the invention comprises a feature mining construction module and a composite state evaluation module;
the characteristic mining construction module is used for acquiring historical data information of the cable to be evaluated, mining the dangerous factors and the characterization characteristics of the historical data information according to a rough set theory, generating effective characteristic information and constructing state core characterization characteristic information;
The composite state evaluation module is used for establishing a cable composite state evaluation model, performing composite state evaluation on the cable to be evaluated to obtain a cable composite state evaluation result, and determining a cable evaluation result according to the cable composite state evaluation result.
According to the high-voltage cable composite state evaluation system, the risk factors and the characterization features are mined on the historical data information to generate the effective feature information, the state core characterization feature information is constructed, the composite state evaluation is carried out by the cable composite state evaluation model to obtain the cable composite state evaluation result, the cable evaluation result is further determined, the cable state accurate evaluation is realized, the data comparison and the diagnosis basis can be provided for the high-voltage cable circuit live detection and the on-line monitoring result analysis, the comprehensive improvement of the state detection and evaluation level of the cable circuit is facilitated, the on-site state detection work is supported, and the safe, stable and reliable operation of the high-voltage cable circuit is ensured.
The invention also provides a computer readable storage medium storing a computer program which, when executed by a processor, implements the method.
The invention also provides high-voltage cable composite state evaluation equipment, which comprises the storage medium and a processor, wherein the processor realizes the steps of the method when executing the computer program on the storage medium.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The method for evaluating the composite state of the high-voltage cable is characterized by comprising the following steps of:
acquiring historical data information of a cable to be evaluated, mining risk factors and characterization features of the historical data information according to a rough set theory, generating effective feature information, and constructing state core characterization feature information;
Establishing a cable composite state evaluation model, performing composite state evaluation on a cable to be evaluated to obtain a cable composite state evaluation result, and determining a cable evaluation result according to the cable composite state evaluation result;
The step of obtaining the historical data information of the cable to be evaluated comprises the following steps: inquiring cable fault historical data information, cable ledger information, cable office discharge industrial site data information and severe line detection data information;
the state core characterization feature information includes: partial discharge characteristic information, dielectric loss characteristic information, sheath circulation characteristic information and temperature characteristic information;
the method for establishing the cable composite state evaluation model and evaluating the composite state of the cable to be evaluated specifically comprises the following steps:
Establishing a cable composite state evaluation model, and determining evaluation parameters according to the partial discharge characteristic information, the dielectric loss characteristic information, the sheath circulation characteristic information and the temperature characteristic information;
Respectively evaluating the partial discharge characteristic information, the sheath circulation characteristic information, the dielectric loss characteristic information and the temperature characteristic information according to preset corresponding evaluation standards, and respectively determining cable ageing type information, cable sheath characteristic information, cable dielectric loss type information and cable temperature characteristic information;
determining a cable evaluation value according to the cable ageing type information, the cable sheath characteristic information, the cable dielectric loss type information and the cable temperature characteristic information and the corresponding preset weights;
Comparing the cable evaluation value with a preset evaluation comparison table to generate a cable composite state evaluation result;
Inputting the cable composite state evaluation result into the cable composite state evaluation model to obtain a cable evaluation result;
comparing the cable evaluation value with a preset evaluation comparison table to generate a cable composite state evaluation result, wherein the cable composite state evaluation result specifically comprises the following steps of:
comparing the cable assessment score with a preset lowest assessment score;
if the cable evaluation value is lower than the preset lowest evaluation threshold value, determining that the cable composite state evaluation result is serious, and generating immediate overhaul prompt information;
Otherwise, respectively determining weight vectors of cable ageing type information, cable sheath characteristic information, cable dielectric loss type information and cable temperature characteristic information, and carrying out comprehensive state evaluation to obtain a cable composite state evaluation result;
The weight vector for respectively determining the cable ageing type information, the cable sheath characteristic information, the cable dielectric loss type information and the cable temperature characteristic information and carrying out comprehensive state evaluation specifically comprises the following steps:
Establishing a state evaluation index system according to the partial discharge characteristic information, the sheath circulation characteristic information, the dielectric loss characteristic information and the temperature characteristic information;
Constructing a judgment matrix by using a 1-9 scale method, and determining weight grades of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index quantity system according to the judgment matrix;
Calculating single-order weight vectors and carrying out consistency check according to weight grades of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index amount system respectively, and calculating total-order weight vectors and carrying out consistency check to obtain weight vectors of all parameters in the target layer, the criterion layer and the scheme layer in the state evaluation index amount system;
And carrying out comprehensive state evaluation according to the cable evaluation value and weight vectors of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index quantity system to obtain a cable composite state evaluation result.
2. The method for evaluating the composite state of the high-voltage cable according to claim 1, wherein the step of obtaining the cable evaluation result specifically comprises the steps of:
And sequentially inputting the cable composite state evaluation result into a plurality of stage sub-models of the cable composite state evaluation model, comparing the cable composite state evaluation result with a threshold value of a corresponding stage sub-model, and determining the cable evaluation result according to the comparison result.
3. The method for evaluating a composite state of a high-voltage cable according to any one of claims 1 to 2, further comprising the steps of:
And dynamically feeding back and adjusting the evaluation parameters in the cable composite state evaluation model according to the cable composite state evaluation result and the core characterization characteristic information.
4. The utility model provides a high tension cable composite state evaluation system which characterized in that: the system comprises a feature mining construction module and a composite state evaluation module;
the characteristic mining construction module is used for acquiring historical data information of the cable to be evaluated, mining the dangerous factors and the characterization characteristics of the historical data information according to a rough set theory, generating effective characteristic information and constructing state core characterization characteristic information;
The composite state evaluation module is used for establishing a cable composite state evaluation model, performing composite state evaluation on the cable to be evaluated to obtain a cable composite state evaluation result, and determining a cable evaluation result according to the cable composite state evaluation result;
The step of obtaining the historical data information of the cable to be evaluated comprises the following steps: inquiring cable fault historical data information, cable ledger information, cable office discharge industrial site data information and severe line detection data information;
the state core characterization feature information includes: partial discharge characteristic information, dielectric loss characteristic information, sheath circulation characteristic information and temperature characteristic information;
The specific implementation of establishing a cable composite state evaluation model and evaluating the composite state of the cable to be evaluated is as follows:
Establishing a cable composite state evaluation model, and determining evaluation parameters according to the partial discharge characteristic information, the dielectric loss characteristic information, the sheath circulation characteristic information and the temperature characteristic information;
Respectively evaluating the partial discharge characteristic information, the sheath circulation characteristic information, the dielectric loss characteristic information and the temperature characteristic information according to preset corresponding evaluation standards, and respectively determining cable ageing type information, cable sheath characteristic information, cable dielectric loss type information and cable temperature characteristic information;
determining a cable evaluation value according to the cable ageing type information, the cable sheath characteristic information, the cable dielectric loss type information and the cable temperature characteristic information and the corresponding preset weights;
Comparing the cable evaluation value with a preset evaluation comparison table to generate a cable composite state evaluation result;
Inputting the cable composite state evaluation result into the cable composite state evaluation model to obtain a cable evaluation result;
comparing the cable evaluation value with a preset evaluation comparison table to generate a cable composite state evaluation result, wherein the cable composite state evaluation result specifically comprises the following steps of:
comparing the cable assessment score with a preset lowest assessment score;
if the cable evaluation value is lower than the preset lowest evaluation threshold value, determining that the cable composite state evaluation result is serious, and generating immediate overhaul prompt information;
Otherwise, respectively determining weight vectors of cable ageing type information, cable sheath characteristic information, cable dielectric loss type information and cable temperature characteristic information, and carrying out comprehensive state evaluation to obtain a cable composite state evaluation result;
The weight vector for respectively determining the cable ageing type information, the cable sheath characteristic information, the cable dielectric loss type information and the cable temperature characteristic information and carrying out comprehensive state evaluation specifically comprises the following steps:
Establishing a state evaluation index system according to the partial discharge characteristic information, the sheath circulation characteristic information, the dielectric loss characteristic information and the temperature characteristic information;
Constructing a judgment matrix by using a 1-9 scale method, and determining weight grades of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index quantity system according to the judgment matrix;
Calculating single-order weight vectors and carrying out consistency check according to weight grades of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index amount system respectively, and calculating total-order weight vectors and carrying out consistency check to obtain weight vectors of all parameters in the target layer, the criterion layer and the scheme layer in the state evaluation index amount system;
And carrying out comprehensive state evaluation according to the cable evaluation value and weight vectors of all parameters in a target layer, a criterion layer and a scheme layer in the state evaluation index quantity system to obtain a cable composite state evaluation result.
5. A computer-readable storage medium, characterized in that a computer program is stored, which, when being executed by a processor, implements the method of any one of claims 1 to 2.
6. A high voltage cable composite state evaluation device comprising the storage medium of claim 5 and a processor implementing the steps of the method of any one of claims 1 to 2 when executing a computer program on the storage medium.
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| CN102496069A (en) * | 2011-12-07 | 2012-06-13 | 山东电力集团公司青岛供电公司 | Cable multimode safe operation evaluation method based on fuzzy analytic hierarchy process (FAHP) |
| CN110766313A (en) * | 2019-10-18 | 2020-02-07 | 山东电工电气集团有限公司 | Cable tunnel comprehensive state evaluation method based on operation and maintenance system |
| CN111273125A (en) * | 2020-01-07 | 2020-06-12 | 西安工程大学 | Fault diagnosis method of power cable channel based on RST-CNN |
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| WO2012009724A1 (en) * | 2010-07-16 | 2012-01-19 | The Trustees Of Columbia University In The City Of New York | Machine learning for power grids |
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| CN102496069A (en) * | 2011-12-07 | 2012-06-13 | 山东电力集团公司青岛供电公司 | Cable multimode safe operation evaluation method based on fuzzy analytic hierarchy process (FAHP) |
| CN110766313A (en) * | 2019-10-18 | 2020-02-07 | 山东电工电气集团有限公司 | Cable tunnel comprehensive state evaluation method based on operation and maintenance system |
| CN111273125A (en) * | 2020-01-07 | 2020-06-12 | 西安工程大学 | Fault diagnosis method of power cable channel based on RST-CNN |
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