CN115345480A - Overhead transmission line monitoring and early warning method based on digitization technology - Google Patents
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Abstract
The invention discloses an overhead transmission line monitoring and early warning method based on a digital technology, which comprises the steps of obtaining appearance parameter data and internal crimping quality parameters of crimping hardware fittings in each section of overhead transmission line, analyzing to obtain an appearance quality coincidence index and an internal crimping quality coincidence index of the crimping hardware fittings in each section of overhead transmission line, simultaneously evaluating a comprehensive quality coincidence coefficient of the crimping hardware fittings in each section of overhead transmission line by combining the appearance quality coincidence index and the internal crimping quality coincidence index of the crimping hardware fittings in each section of overhead transmission line, and carrying out contrastive analysis processing, thereby realizing multi-dimensional data analysis on the quality of the crimping hardware fittings corresponding to the overhead transmission line, further effectively and pertinently processing the overhead transmission line in time, reducing the occurrence rate of overhead faults, further ensuring that the overhead transmission line can safely and stably run, and guaranteeing the power supply safety of the overhead transmission line.
Description
Technical Field
The invention relates to the technical field of power transmission line monitoring, in particular to an overhead power transmission line monitoring and early warning method based on a digital technology.
Background
The overhead transmission line is an important component in the smart power grid, accidents such as disconnection which often occur in the overhead transmission line seriously affect the safe operation of a power system, and the accidents such as disconnection are mostly caused by the fact that the quality of a pressure joint hardware fitting in the overhead transmission line does not meet the requirements of regulations. In order to prevent the accidents, the method for monitoring the quality of the pressure joint hardware in the overhead transmission line is researched, and the method has very important theoretical and engineering application values.
At present, most of the existing quality monitoring modes of crimping hardware fittings are to carry out spot check monitoring on the appearance quality of the crimping hardware fittings in an overhead transmission line, so that comprehensive monitoring and analysis on the crimping hardware fittings corresponding to the overhead transmission line cannot be realized, the problem that the appearance quality of part of the crimping hardware fittings is abnormal and the spot check monitoring is not carried out exists, the accuracy and the comprehensiveness of the monitoring and analysis result of the overhead transmission line in the later period are reduced, the monitoring requirement of the overhead transmission line cannot be met, and the safety and the stability of the overhead transmission line are further influenced;
the appearance quality of crimping gold utensil can only be monitored to current crimping gold utensil quality monitoring mode, and the inside crimping quality of unable monitoring crimping gold utensil, make current monitoring mode have certain limitation like this, when the inside crimping quality of crimping gold utensil is not conform to the regulation requirement, can bury down the potential safety hazard in the crimping gold utensil is inside, thereby cause overhead transmission line to appear falling the line, circuit faults such as disconnected strand, make overhead transmission line's safety and stability operation receive the influence, and simultaneously, can't in time carry out the pertinence to overhead transmission line effectively and handle, further can not ensure overhead transmission line's safe power supply.
Disclosure of Invention
In view of this, in order to solve the problems proposed in the background art, a digital technology-based overhead transmission line monitoring and early warning method is proposed;
the purpose of the invention can be realized by the following technical scheme:
an overhead transmission line monitoring and early warning method based on a digital technology comprises the following steps:
step one, numbering overhead transmission lines: recording power transmission lines among all towers in the overhead power transmission line to be monitored as all sections of overhead power transmission lines, and sequentially numbering all sections of overhead power transmission lines as 1,2,. Once, i,. Once, n according to a set sequence;
step two, acquiring appearance images of the crimping hardware: collecting appearance images of all crimping hardware fittings in all sections of overhead transmission lines, and extracting appearance parameter data of all crimping hardware fittings in all sections of overhead transmission lines;
step three, analyzing the appearance quality of the crimping hardware: analyzing and obtaining the appearance quality coincidence index of each crimping hardware fitting in each section of overhead transmission line according to the appearance parameter data of each crimping hardware fitting in each section of overhead transmission line;
step four, internal scanning of the crimping hardware fitting: carrying out internal scanning on each crimping hardware fitting in each section of overhead transmission line to obtain internal crimping quality parameters of each crimping hardware fitting in each section of overhead transmission line, wherein the internal quality parameters comprise anchor pipe crimping quality parameters and lead crimping quality parameters;
step five, analyzing the crimping quality inside the crimping hardware: analyzing the internal crimping quality parameters of each crimping hardware fitting in each section of overhead transmission line to obtain the internal crimping quality coincidence index of each crimping hardware fitting in each section of overhead transmission line;
step six, comprehensive quality evaluation of crimping hardware: and evaluating the comprehensive quality coincidence coefficient of each crimping hardware fitting in each section of overhead transmission line according to the appearance quality coincidence index and the internal crimping quality coincidence index of each crimping hardware fitting in each section of overhead transmission line, and performing comparative analysis processing.
In a preferred scheme, the specific steps corresponding to the second step are as follows:
counting all crimping hardware fittings in each section of overhead transmission line, numbering all the crimping hardware fittings in each section of overhead transmission line in sequence according to a preset sequence, and forming a number set A of all the crimping hardware fittings in each section of overhead transmission line i ＝(a i1 ,a i2 ,...,a ij ,...,a im )，a ij Expressed as the number of the jth crimping hardware in the ith section of overhead transmission line, i =1,2, ·, n, j =1,2, ·, m;
the method comprises the steps of carrying out omnibearing appearance monitoring on each crimping hardware fitting in each section of overhead transmission line through a high-definition camera carried on a remote control unmanned aerial vehicle, acquiring an appearance image of each crimping hardware fitting in each section of overhead transmission line, and extracting appearance parameter data of each crimping hardware fitting in each section of overhead transmission line according to the appearance image of each crimping hardware fitting in each section of overhead transmission line, wherein the appearance parameter data comprise the outline shape, the surface crack length, the surface rusty area and the surface burr number.
In a preferred scheme, the mode for obtaining the appearance quality conformity index of each crimping hardware fitting in each section of overhead transmission line in the third step is as follows:
extracting standard outline shapes of various types of crimping hardware fittings corresponding to the overhead transmission line to be monitored, which are stored in an overhead transmission line database, comparing to obtain the coincidence ratio of the outline shapes corresponding to the crimping hardware fittings in various sections of overhead transmission lines, and marking the coincidence ratio as a ij w 1 ；
Extracting the surface crack length, the surface corrosion area and the surface burr quantity corresponding to the appearance parameter data of each crimping hardware fitting in each section of overhead transmission line, and respectively marking the surface crack length, the surface corrosion area and the surface burr quantity corresponding to each crimping hardware fitting in each section of overhead transmission line as a ij w 2 、a ij w 3 、a ij w 4 ；
Analyzing the appearance quality coincidence index of each crimping hardware fitting in each section of overhead transmission line
In which ξ i j Expressed as the appearance quality conformity index of the jth crimping hardware fitting in the ith section of overhead transmission line, e is expressed as a natural constant, and lambda 1 、λ 2 、λ 3 、λ 4 Respectively representing the coincidence degree of the contour shapes corresponding to the preset crimping hardware fitting to meet the influence weight, the length of the surface crack to meet the influence weight, the surface rust area to meet the influence weight and the number of the surface burrs to meet the influence weight delta w' 2 、Δw′ 3 、Δw′ 4 Respectively representing the preset allowable crimp fitting surface crack length, the allowable crimp fitting surface corrosion area and the allowable crimp fitting surface burr quantity.
In a preferred scheme, the specific steps corresponding to the fourth step include:
carrying out internal scanning on each crimping hardware fitting in each section of overhead transmission line by an x-ray detector to obtain an internal scanning image of each crimping hardware fitting in each section of overhead transmission line, and extracting a corresponding anchor pipe image in the internal scanning image of each crimping hardware fitting in each section of overhead transmission line according to the internal scanning image of each crimping hardware fitting in each section of overhead transmission line to obtain anchor pipe crimping quality parameters in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line, wherein the anchor pipe crimping quality parameters comprise the number of small-pressure anchor pipe grooves, the size of an anchor pipe cavity, the horizontal length of anchor pipe crimping and the surface crack area of an anchor pipe;
and extracting corresponding lead images in the internal scanning images of the crimping fittings in each section of overhead transmission line according to the internal scanning images of the crimping fittings in each section of overhead transmission line to obtain lead crimping quality parameters in the lead images corresponding to the crimping fittings in each section of overhead transmission line, wherein the lead crimping quality parameters comprise the number of broken strands of the leads, the diameter of the scattered strands of the leads, the end distance of a lead clamp and the crimping length of the leads.
In a preferred scheme, in the fifth step, the analysis of the internal crimping quality parameters of each crimping fitting in each section of overhead transmission line includes:
obtaining the total number of anchor pipe crimping grooves in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line according to the corresponding anchor pipe image in the internal scanning image of each crimping hardware fitting in each section of overhead transmission line, and marking the total number as X' ij ；
Substituting the small-pressure number of the anchor pipe grooves in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line and the size of the anchor pipe cavity gap into an anchor pipe crimping state weight index analysis formula to obtain an anchor pipe crimping state weight index phi corresponding to each crimping hardware fitting in each section of overhead transmission line ij 1 ；
Extracting standard anchor pipe crimping length of corresponding crimping hardware fitting of the to-be-monitored overhead transmission line stored in the overhead transmission line database, and marking the standard anchor pipe crimping length as P' Label 3 ；
Substituting the anchor pipe crimping horizontal length and the anchor pipe surface crack area in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line into an anchor pipe crimping abnormity weight index analysis formula to obtain the anchor pipe crimping horizontal length and the anchor pipe surface crack area corresponding to each crimping hardware fitting in each section of overhead transmission lineAbnormal weight index phi ij 2 ；
Analyzing to obtain the anchor pipe crimping quality coincidence proportionality coefficient of each crimping hardware fitting in each section of overhead transmission line
Wherein
The crimping quality of the anchor pipe of the jth crimping hardware fitting in the ith section of overhead transmission line is expressed as a coincidence proportionality coefficient, mu is expressed as a preset correction proportionality coefficient of the crimping quality of the anchor pipe, and mu is more than 0 and less than 1.
In a preferred embodiment, in the fifth step, the analyzing the internal crimping quality parameter of each crimping hardware in each section of overhead transmission line further includes:
extracting the number of standard wire strands and the diameter of the standard wire corresponding to the to-be-monitored overhead transmission line stored in the overhead transmission line database, and respectively marking the number of the standard wire strands and the diameter of the standard wire corresponding to the to-be-monitored overhead transmission line as q' Label 1 And q' Label 2 ；
Extracting a standard conductor clamp end distance and a standard conductor crimping length of a crimping fitting corresponding to the overhead transmission line to be monitored, which are stored in an overhead transmission line database, and respectively marking the standard conductor clamp end distance and the standard conductor crimping length of the crimping fitting corresponding to the overhead transmission line to be monitored as q' Label 3 And q' Label 4 ；
Analyzing to obtain the lead crimping quality of each crimping hardware fitting in each section of overhead transmission line, wherein the lead crimping quality conforms to the proportionality coefficient
Wherein theta is ij Expressed as the lead crimping quality of the jth crimping hardware fitting in the ith section of overhead transmission line conforms to the proportionality coefficient sigma 1 、σ 2 、σ 3 、σ 4 Respectively expressed as preset crimping hardware fitting corresponding crimping quality influence factors of the number of broken strands of the lead, the diameter of scattered strands of the lead, the clamping end distance of the lead and the crimping length of the lead, a ij q 1 、a ij q 2 、a ij q 3 、a ij q 4 Respectively representing the number of broken strands of the lead, the diameter of scattered strands of the lead, the clamping end distance of the lead and the compression joint length of the lead in a lead image corresponding to the jth compression joint hardware in the ith section of overhead transmission line, e representing a natural constant, and delta q Let 3 And the deviation value is expressed as the corresponding allowable wire clamp end distance deviation value of the preset press fitting.
In a preferred scheme, the obtaining mode of the internal crimping quality conformity index of each press fitting in each section of overhead transmission line in the fifth step is as follows:
the crimping quality of the anchor pipe of each crimping hardware fitting in each section of overhead transmission line accords with the proportionality coefficient
The quality of the wire crimping accords with the proportionality coefficient theta ij Substituting into formula
Obtaining the internal crimping quality conformity index psi of each crimping hardware fitting in each section of overhead transmission line i j In which epsilon 1 、ε 2 And respectively representing the preset coincidence weight influence factors corresponding to the crimping quality of the anchor pipe and the crimping quality of the lead.
In a preferred scheme, the comprehensive quality conformity coefficient of each crimping hardware in each section of overhead transmission line is evaluated in the sixth step, and the specific evaluation mode is as follows:
enabling the appearance quality of each crimping hardware fitting in each section of overhead transmission line to meet the index xi i j And internal crimp quality compliance index psi i j Substituting into the evaluation formula of comprehensive quality coincidence coefficient of crimping hardware
Obtaining the comprehensive quality coincidence coefficient phi of each crimping hardware fitting in each section of overhead transmission line ij Wherein eta 1 、η 2 Respectively expressed as preset crimping hardware fitting appearance quality compensation factors and crimping hardware fitting internal pressureAnd a quality compensation factor is received.
In a preferred scheme, the sixth step of evaluating the comprehensive quality conformity coefficient of each crimping hardware fitting in each section of overhead transmission line and performing comparative analysis processing specifically includes:
comparing the comprehensive quality coincidence coefficient of each crimping hardware fitting in each section of overhead transmission line with a preset quality coincidence coefficient threshold value corresponding to the crimping hardware fitting of the overhead transmission line, if the comprehensive quality coincidence coefficient of a certain crimping hardware fitting in a certain section of overhead transmission line is smaller than the preset quality coincidence coefficient threshold value corresponding to the crimping hardware fitting of the overhead transmission line, indicating that the quality of the crimping hardware fitting in the certain section of overhead transmission line does not accord with the safety requirement of the overhead transmission line, extracting the number of the section of overhead transmission line, and sending the number to a power grid safety control center for early warning display.
Compared with the prior art, the overhead transmission line monitoring and early warning method based on the digital technology has the following beneficial effects:
according to the invention, the appearance images of the crimping hardware fittings in each section of overhead transmission line are collected, the appearance parameter data of the crimping hardware fittings in each section of overhead transmission line is extracted, and the appearance quality conformity index of each crimping hardware fitting in each section of overhead transmission line is obtained through analysis, so that the comprehensive monitoring and analysis of the crimping hardware fittings corresponding to the overhead transmission line are realized, the problem that the appearance quality of part of the crimping hardware fittings is abnormal and the monitoring is not checked is avoided, the accuracy and the comprehensiveness of the monitoring and analysis result of the overhead transmission line in the later period are improved, the monitoring requirement of the overhead transmission line is further met, and the safety and the stability of the overhead transmission line in the later period are improved.
According to the invention, the internal crimping quality parameters of the crimping hardware fittings in each section of overhead transmission line are obtained through scanning, and the internal crimping quality conformity indexes of the crimping hardware fittings in each section of overhead transmission line are obtained through analysis, so that the internal crimping quality of the crimping hardware fittings corresponding to the overhead transmission line is monitored visually, effectively and nondestructively, the limitation of the existing monitoring mode is broken, the internal potential safety hazards of the crimping hardware fittings can be found and early-warned timely when found, the occurrence rate of faults of the overhead transmission line is further effectively reduced, the overhead transmission line can be ensured to run safely and stably, meanwhile, the comprehensive quality conformity coefficients of the crimping hardware fittings in each section of overhead transmission line are evaluated in combination with the appearance quality conformity indexes of the crimping hardware fittings in each section of overhead transmission line, and the comparison analysis is carried out, so that the multidimensional data analysis of the crimping hardware fittings corresponding to the transmission line is realized, the overhead transmission line can be further effectively and pertinently processed timely, and the power supply safety of the overhead transmission line is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of the method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the invention provides a digital technology-based overhead transmission line monitoring and early warning method, which includes the following steps:
step one, numbering overhead transmission lines: recording the power transmission lines among all towers in the overhead power transmission line to be monitored as all sections of overhead power transmission lines, and sequentially numbering all the sections of overhead power transmission lines as 1,2, a.
Step two, acquiring appearance images of the crimping hardware: and collecting appearance images of all the crimping hardware fittings in all the sections of overhead transmission lines, and extracting appearance parameter data of all the crimping hardware fittings in all the sections of overhead transmission lines.
On the basis of the above embodiment, the specific steps corresponding to the second step are as follows:
counting all crimping hardware fittings in each section of overhead transmission line, numbering all the crimping hardware fittings in each section of overhead transmission line in sequence according to a preset sequence, and forming a numbering set A of all the crimping hardware fittings in each section of overhead transmission line i ＝(a i1 ,a i2 ,...,a ij ,...,a im )，a ij Expressed as the number of the jth crimping fitting in the ith section of overhead transmission line, i =1,2,. Multidot.n, j =1,2,. Multidot.m;
the method comprises the steps of carrying out omnibearing appearance monitoring on each crimping hardware fitting in each section of overhead transmission line through a high-definition camera carried on a remote control unmanned aerial vehicle, acquiring an appearance image of each crimping hardware fitting in each section of overhead transmission line, and extracting appearance parameter data of each crimping hardware fitting in each section of overhead transmission line according to the appearance image of each crimping hardware fitting in each section of overhead transmission line, wherein the appearance parameter data comprise the outline shape, the surface crack length, the surface rust area and the surface burr number.
Further, the extraction modes of the surface crack length, the surface corrosion area and the surface burr number of each crimping fitting in each section of overhead transmission line are as follows:
performing gray level processing on the appearance image of each crimping hardware fitting in each section of overhead transmission line to obtain an appearance gray level image of each crimping hardware fitting in each section of overhead transmission line, obtaining a gray level image of each crimping hardware fitting in each section of overhead transmission line and comparing the appearance gray level image of each crimping hardware fitting in each section of overhead transmission line with a standard appearance gray level image of the corresponding crimping hardware fitting to obtain a gray level value of each abnormal area in the appearance gray level image of each crimping hardware fitting in each section of overhead transmission line, comparing the gray level value of each abnormal area in the appearance gray level image of each crimping hardware fitting in each section of overhead transmission line with a preset gray level range corresponding to the surface crack gray level image of the crimping hardware fitting, if the gray level value of a certain abnormal area in the appearance gray level image of a certain crimping hardware fitting in a certain section of overhead transmission line is within the preset range corresponding to the surface crack image of the crimping hardware fitting, indicating that the abnormal area in the appearance gray level image of the crimping hardware fitting in the section of overhead transmission line is a surface crack area, counting each surface crack area in each crimping hardware fitting in each section of overhead transmission line, and obtaining the accumulated length of each surface crack in each section of the crimping hardware fitting in the overhead transmission line;
and in the same way, the surface corrosion area and the surface burr quantity of each crimping hardware fitting in each section of overhead transmission line are sequentially obtained.
Step three, analyzing the appearance quality of the crimping hardware: and analyzing the appearance quality conformity index of each crimping hardware fitting in each section of overhead transmission line according to the appearance parameter data of each crimping hardware fitting in each section of overhead transmission line.
On the basis of the above embodiment, the mode for obtaining the appearance quality conformity index of each crimping hardware fitting in each section of overhead transmission line in the third step is as follows:
extracting the standard outline shapes of the crimping hardware fittings of various types corresponding to the overhead transmission line to be monitored, which are stored in the overhead transmission line database, comparing to obtain the coincidence degree of the outline shapes corresponding to the crimping hardware fittings in various sections of overhead transmission lines, and marking the coincidence degree as a ij w 1 ；
Extracting the surface crack length, the surface corrosion area and the surface burr quantity corresponding to the appearance parameter data of each crimping hardware fitting in each section of overhead transmission line, and respectively marking the surface crack length, the surface corrosion area and the surface burr quantity corresponding to each crimping hardware fitting in each section of overhead transmission line as a ij w 2 、a ij w 3 、a ij w 4 ；
Analyzing appearance quality coincidence index of each crimping hardware fitting in each section of overhead transmission line
Xi therein i j Denoted as i-th section of overhead transmission lineThe appearance quality of the jth crimping hardware fitting is in accordance with the index, e is expressed as a natural constant, and lambda 1 、λ 2 、λ 3 、λ 4 Respectively representing that the coincidence degree of the outline shapes corresponding to the preset crimping hardware accords with the influence weight, the surface crack length accords with the influence weight, the surface corrosion area accords with the influence weight and the surface burr quantity accords with the influence weight, delta w' 2 、Δw′ 3 、Δw′ 4 The method comprises the steps of respectively representing the preset allowable crimping hardware surface crack length, the allowable crimping hardware surface corrosion area and the allowable crimping hardware surface burr quantity.
Further, the above comparison results in the degree of coincidence of the contour shapes corresponding to the crimping fittings in each section of overhead transmission line, which specifically includes:
extracting the outline shape corresponding to the appearance parameter data of each crimping hardware fitting in each section of overhead transmission line, comparing the outline shape of each crimping hardware fitting in each section of overhead transmission line with the standard outline shape of each type of crimping hardware fitting, counting the outline shape coincidence degree of each crimping hardware fitting in each section of overhead transmission line and each type of crimping hardware fitting, comparing and screening the highest outline shape coincidence degree corresponding to each crimping hardware fitting in each section of overhead transmission line, and recording the highest outline shape coincidence degree as the outline shape coincidence degree corresponding to each crimping hardware fitting in each section of overhead transmission line.
In this embodiment, the appearance images of the crimping hardware fittings in each section of the overhead transmission line are collected, the appearance parameter data of the crimping hardware fittings in each section of the overhead transmission line is extracted, and the appearance quality conformity index of each crimping hardware fitting in each section of the overhead transmission line is obtained through analysis, so that the corresponding crimping hardware fittings of the overhead transmission line are comprehensively monitored and analyzed, the problem that the appearance quality of part of the crimping hardware fittings is abnormal and the monitoring is not checked and monitored is solved, the accuracy and the comprehensiveness of the monitoring and analyzing result of the overhead transmission line in the later period are improved, the monitoring requirement of the overhead transmission line is further met, and the safety and the stability of the overhead transmission line in the later period are improved.
Step four, internal scanning of the crimping hardware: and carrying out internal scanning on each crimping hardware fitting in each section of overhead transmission line to obtain internal crimping quality parameters of each crimping hardware fitting in each section of overhead transmission line, wherein the internal quality parameters comprise anchor pipe crimping quality parameters and lead crimping quality parameters.
On the basis of the above embodiment, the specific steps corresponding to the fourth step include:
carrying out internal scanning on each crimping hardware fitting in each section of overhead transmission line by an x-ray detector carried on a remote control unmanned aerial vehicle to obtain an internal scanning image of each crimping hardware fitting in each section of overhead transmission line, and extracting a corresponding anchor tube image in the internal scanning image of each crimping hardware fitting in each section of overhead transmission line according to the internal scanning image of each crimping hardware fitting in each section of overhead transmission line to obtain anchor tube crimping quality parameters in the anchor tube image corresponding to each crimping hardware fitting in each section of overhead transmission line, wherein the anchor tube crimping quality parameters comprise the number of small-pressure anchor tube grooves, the size of an anchor tube cavity space, the horizontal length of anchor tube crimping and the surface crack area of an anchor tube;
and extracting corresponding conductor images in the internal scanning images of the crimping hardware fittings in each section of overhead transmission line according to the internal scanning images of the crimping hardware fittings in each section of overhead transmission line to obtain conductor crimping quality parameters in the conductor images corresponding to the crimping hardware fittings in each section of overhead transmission line, wherein the conductor crimping quality parameters comprise the number of broken strands of the conductor, the diameter of the broken strands of the conductor, the clamping end distance of the conductor and the crimping length of the conductor.
Step five, analyzing the internal crimping quality of the crimping hardware: and analyzing the internal crimping quality parameters of the crimping hardware fittings in each section of overhead transmission line to obtain the internal crimping quality conformity index of the crimping hardware fittings in each section of overhead transmission line.
On the basis of the above embodiment, in the fifth step, the analysis of the internal crimping quality parameters of each crimping fitting in each section of overhead transmission line includes:
obtaining the total number of anchor pipe crimping grooves in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line according to the corresponding anchor pipe image in the internal scanning image of each crimping hardware fitting in each section of overhead transmission line, and marking the total number as X' ij ；
Substituting the small-pressure quantity of the anchor pipe grooves and the size of the anchor pipe cavity gap in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line into an anchor pipe crimping state weight index analysis formula to obtain an anchor pipe crimping state weight index phi corresponding to each crimping hardware fitting in each section of overhead transmission line ij 1 ；
Extracting standard anchor pipe crimping length of corresponding crimping hardware fitting of the overhead transmission line to be monitored, which is stored in the overhead transmission line database, and marking the standard anchor pipe crimping length as P' Label 3 ；
Substituting the anchor pipe crimping horizontal length and the anchor pipe surface crack area in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line into an anchor pipe crimping abnormity weight index analysis formula to obtain an anchor pipe crimping abnormity weight index phi corresponding to each crimping hardware fitting in each section of overhead transmission line ij 2 ；
Analyzing to obtain the anchor pipe crimping quality coincidence proportionality coefficient of each crimping hardware fitting in each section of overhead transmission line
Wherein
The crimping quality of the anchor pipe of the jth crimping hardware fitting in the ith section of overhead transmission line is expressed as a coincidence proportionality coefficient, mu is expressed as a preset correction proportionality coefficient of the crimping quality of the anchor pipe, and mu is more than 0 and less than 1.
Further, the weight index analysis formula of the crimping state of the anchor pipe corresponding to each crimping hardware fitting in each section of overhead transmission line is
Wherein delta 1 、δ 2 Respectively expressed as a crimping state influence factor, a, corresponding to the crimping quantity ratio of the preset crimping hardware anchor pipe grooves and the crimping hardware anchor pipe cavity gap ratio ij p 1 、a ij p 2 Respectively expressed as the number of the anchor pipe grooves of the jth crimping fitting in the ith section of overhead transmission line corresponding to the anchor pipe image and the size of the anchor pipe cavity gap,Δp′ 2 and the size is expressed as the corresponding allowable anchor pipe cavity gap size of the preset crimping hardware.
Furthermore, the weight index analysis formula of the abnormal crimping weight of the anchor pipe corresponding to each crimping hardware fitting in each section of overhead transmission line is
Wherein delta 3 、δ 4 Respectively expressed as preset crimping hardware anchor pipe crimping deformation length and crimping hardware anchor pipe surface crack area corresponding crimping abnormal influence factors, a ij p 3 、a ij p 4 Respectively expressed as an anchor pipe crimping horizontal length and an anchor pipe surface crack area delta p 'in the anchor pipe image corresponding to the jth crimping hardware in the ith section of overhead transmission line' Let 4 And the allowable anchor pipe surface crack area corresponding to the preset crimping hardware is represented.
On the basis of the above embodiment, in the fifth step, the analyzing the internal crimping quality parameters of each crimping hardware in each section of overhead transmission line further includes:
extracting the number of standard wire strands and the diameter of the standard wire corresponding to the to-be-monitored overhead transmission line stored in the overhead transmission line database, and respectively marking the number of the standard wire strands and the diameter of the standard wire corresponding to the to-be-monitored overhead transmission line as q' Label 1 And q' Label 2 ；
Extracting a standard conductor clamp end distance and a standard conductor crimping length of a crimping fitting corresponding to the overhead transmission line to be monitored, which are stored in an overhead transmission line database, and respectively marking the standard conductor clamp end distance and the standard conductor crimping length of the crimping fitting corresponding to the overhead transmission line to be monitored as q' Label 3 And q' Label 4 ；
Analyzing to obtain the lead crimping quality coincidence proportionality coefficient of each crimping hardware fitting in each section of overhead transmission line
Wherein theta is ij Conductor crimping quality conformity proportion system expressed as jth crimping hardware fitting in ith section of overhead transmission lineNumber, σ 1 、σ 2 、σ 3 、σ 4 Respectively expressed as preset crimping hardware fitting corresponding crimping quality influence factors of the number of broken strands of the lead, the diameter of scattered strands of the lead, the clamping end distance of the lead and the crimping length of the lead, a ij q 1 、a ij q 2 、a ij q 3 、a ij q 4 Respectively expressed as the number of broken strands of the lead, the diameter of scattered strands of the lead, the clamping end distance of the lead and the crimping length of the lead in the image of the lead corresponding to the jth crimping hardware fitting in the ith section of overhead transmission line, e is expressed as a natural constant, and delta q is expressed as Let 3 And the deviation value is expressed as the corresponding allowable wire clamp end distance deviation value of the preset press fitting.
On the basis of the above embodiment, the obtaining manner of the internal crimping quality conformity index of each press fitting in each section of overhead transmission line in the fifth step is as follows:
the crimping quality of the anchor pipe of each crimping hardware fitting in each section of overhead transmission line accords with the proportionality coefficient
The quality of the wire crimping accords with the proportionality coefficient theta ij Substitution formula
Obtaining the internal crimping quality coincidence index psi of each crimping hardware fitting in each section of overhead transmission line i j In which epsilon 1 、ε 2 And respectively representing the preset coincidence weight influence factors corresponding to the crimping quality of the anchor pipe and the crimping quality of the lead.
In the embodiment, the internal crimping quality parameters of the crimping hardware fittings in each section of overhead transmission line are obtained through scanning, and the internal crimping quality conformity index of the crimping hardware fittings in each section of overhead transmission line is obtained through analysis, so that the internal crimping quality of the corresponding crimping hardware fittings of the overhead transmission line is monitored visually, effectively and nondestructively, the limitation of the existing monitoring mode is broken, the internal potential safety hazard of the crimping hardware fittings can be found and early warned timely, the occurrence rate of faults of the overhead transmission line is further effectively reduced, and the safe and stable operation of the overhead transmission line is ensured.
Step six, comprehensive quality evaluation of crimping hardware: according to the appearance quality conformity index and the internal crimping quality conformity index of each crimping hardware fitting in each section of overhead transmission line, the comprehensive quality conformity coefficient of each crimping hardware fitting in each section of overhead transmission line is evaluated, and the comparison analysis processing is carried out, so that the multi-dimensional data analysis of the quality of the crimping hardware fitting corresponding to the overhead transmission line is realized, the overhead transmission line can be further effectively processed in a targeted manner in time, and the power supply safety of the overhead transmission line is guaranteed.
On the basis of the above embodiment, the comprehensive quality conformity coefficient of each crimping hardware in each section of overhead transmission line is evaluated in the sixth step, and the specific evaluation mode is as follows:
enabling the appearance quality of each crimping hardware fitting in each section of overhead transmission line to accord with an index xi i j And internal crimp quality meets the index psi i j Substituting into the evaluation formula of comprehensive quality coincidence coefficient of crimping hardware
Obtaining the comprehensive quality coincidence coefficient phi of each crimping hardware fitting in each section of overhead transmission line ij Wherein eta 1 、η 2 Respectively expressed as a preset crimping hardware appearance quality compensation factor and a crimping hardware internal crimping quality compensation factor.
Further, the sixth step of evaluating the comprehensive quality conformity coefficient of each crimping hardware fitting in each section of overhead transmission line and performing comparative analysis processing specifically includes:
and comparing the comprehensive quality coincidence coefficient of each crimping hardware fitting in each section of overhead transmission line with a preset quality coincidence coefficient threshold value corresponding to the crimping hardware fitting of the overhead transmission line, if the comprehensive quality coincidence coefficient of a certain crimping hardware fitting in a certain section of overhead transmission line is smaller than the preset quality coincidence coefficient threshold value corresponding to the crimping hardware fitting of the overhead transmission line, indicating that the quality of the crimping hardware fitting in the certain section of overhead transmission line does not accord with the safety requirement of the overhead transmission line, extracting the number of the section of overhead transmission line, and sending the number to a power grid safety control center for early warning display.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (9)
1. A digital technology-based overhead transmission line monitoring and early warning method is characterized by comprising the following steps:
step one, numbering overhead transmission lines: recording power transmission lines among all towers in the overhead power transmission line to be monitored as all sections of overhead power transmission lines, and sequentially numbering all sections of overhead power transmission lines as 1,2,. Once, i,. Once, n according to a set sequence;
step two, acquiring appearance images of the crimping hardware: collecting appearance images of all crimping hardware fittings in all sections of overhead transmission lines, and extracting appearance parameter data of all crimping hardware fittings in all sections of overhead transmission lines;
step three, analyzing the appearance quality of the crimping hardware: analyzing and obtaining the appearance quality conformity index of each crimping hardware fitting in each section of overhead transmission line according to the appearance parameter data of each crimping hardware fitting in each section of overhead transmission line;
step four, internal scanning of the crimping hardware fitting: carrying out internal scanning on each crimping hardware fitting in each section of overhead transmission line to obtain internal crimping quality parameters of each crimping hardware fitting in each section of overhead transmission line, wherein the internal quality parameters comprise anchor pipe crimping quality parameters and lead crimping quality parameters;
step five, analyzing the internal crimping quality of the crimping hardware: analyzing the internal crimping quality parameters of each crimping hardware fitting in each section of overhead transmission line to obtain the internal crimping quality coincidence index of each crimping hardware fitting in each section of overhead transmission line;
step six, comprehensive quality evaluation of crimping hardware: and evaluating the comprehensive quality coincidence coefficient of each crimping hardware fitting in each section of overhead transmission line according to the appearance quality coincidence index and the internal crimping quality coincidence index of each crimping hardware fitting in each section of overhead transmission line, and performing comparative analysis processing.
2. The overhead transmission line monitoring and early warning method based on the digitization technology as claimed in claim 1, which is characterized in that: the second step corresponds to the following specific steps:
counting all crimping hardware fittings in each section of overhead transmission line, numbering all the crimping hardware fittings in each section of overhead transmission line in sequence according to a preset sequence, and forming a number set A of all the crimping hardware fittings in each section of overhead transmission line i ＝(a i1 ,a i2 ,...,a ij ,...,a im )，a ij Expressed as the number of the jth crimping hardware in the ith section of overhead transmission line, i =1,2, ·, n, j =1,2, ·, m;
the method comprises the steps of carrying out omnibearing appearance monitoring on each crimping hardware fitting in each section of overhead transmission line through a high-definition camera carried on a remote control unmanned aerial vehicle, acquiring an appearance image of each crimping hardware fitting in each section of overhead transmission line, and extracting appearance parameter data of each crimping hardware fitting in each section of overhead transmission line according to the appearance image of each crimping hardware fitting in each section of overhead transmission line, wherein the appearance parameter data comprise the outline shape, the surface crack length, the surface rust area and the surface burr number.
3. The overhead transmission line monitoring and early warning method based on the digitization technology as claimed in claim 2, wherein: the mode for obtaining the appearance quality conformity indexes of the crimping hardware fittings in each section of overhead transmission line in the third step is as follows:
extracting the standard outline shapes of the crimping hardware fittings of various types corresponding to the overhead transmission line to be monitored, which are stored in the overhead transmission line database, comparing to obtain the coincidence degree of the outline shapes corresponding to the crimping hardware fittings in various sections of overhead transmission lines, and marking the coincidence degree as a ij w 1 ；
Extracting the surface crack length, the surface corrosion area and the surface hair corresponding to the appearance parameter data of each crimping hardware fitting in each section of overhead transmission lineMarking the length of the surface crack, the surface corrosion area and the surface burr number corresponding to each crimping hardware fitting in each section of overhead transmission line as a ij w 2 、a ij w 3 、a ij w 4 ；
Analyzing appearance quality coincidence index of each crimping hardware fitting in each section of overhead transmission line
In which ξ i j The appearance quality of the jth crimping hardware fitting in the ith section of overhead transmission line is expressed as a coincidence index, e is expressed as a natural constant, and lambda is 1 、λ 2 、λ 3 、λ 4 Respectively representing that the coincidence degree of the outline shapes corresponding to the preset crimping hardware accords with the influence weight, the surface crack length accords with the influence weight, the surface corrosion area accords with the influence weight and the surface burr quantity accords with the influence weight, delta w' 2 、Δw′ 3 、Δw′ 4 Respectively representing the preset allowable crimp fitting surface crack length, the allowable crimp fitting surface corrosion area and the allowable crimp fitting surface burr quantity.
4. The overhead transmission line monitoring and early warning method based on the digitization technology as claimed in claim 1, which is characterized in that: the concrete steps corresponding to the fourth step comprise:
carrying out internal scanning on each crimping hardware fitting in each section of overhead transmission line by an x-ray detector to obtain an internal scanning image of each crimping hardware fitting in each section of overhead transmission line, and extracting a corresponding anchor pipe image in the internal scanning image of each crimping hardware fitting in each section of overhead transmission line according to the internal scanning image of each crimping hardware fitting in each section of overhead transmission line to obtain anchor pipe crimping quality parameters in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line, wherein the anchor pipe crimping quality parameters comprise the number of small-pressure anchor pipe grooves, the size of an anchor pipe cavity, the horizontal length of anchor pipe crimping and the surface crack area of an anchor pipe;
and extracting corresponding conductor images in the internal scanning images of the crimping hardware fittings in each section of overhead transmission line according to the internal scanning images of the crimping hardware fittings in each section of overhead transmission line to obtain conductor crimping quality parameters in the conductor images corresponding to the crimping hardware fittings in each section of overhead transmission line, wherein the conductor crimping quality parameters comprise the number of broken strands of the conductor, the diameter of the broken strands of the conductor, the clamping end distance of the conductor and the crimping length of the conductor.
5. The overhead transmission line monitoring and early warning method based on the digitization technology as claimed in claim 4, wherein: analyzing the internal crimping quality parameters of each crimping hardware fitting in each section of overhead transmission line in the fifth step, wherein the concrete analysis comprises the following steps:
obtaining the total number of anchor pipe crimping grooves in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line according to the corresponding anchor pipe image in the internal scanning image of each crimping hardware fitting in each section of overhead transmission line, and marking the total number as X' ij ；
Substituting the small-pressure number of the anchor pipe grooves in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line and the size of the anchor pipe cavity gap into an anchor pipe crimping state weight index analysis formula to obtain an anchor pipe crimping state weight index phi corresponding to each crimping hardware fitting in each section of overhead transmission line ij 1 ；
Extracting standard anchor pipe crimping length of corresponding crimping hardware fitting of the to-be-monitored overhead transmission line stored in the overhead transmission line database, and marking the standard anchor pipe crimping length as P' Label 3 ；
Substituting the anchor pipe crimping horizontal length and the anchor pipe surface crack area in the anchor pipe image corresponding to each crimping hardware fitting in each section of overhead transmission line into an anchor pipe crimping abnormity weight index analysis formula to obtain an anchor pipe crimping abnormity weight index phi corresponding to each crimping hardware fitting in each section of overhead transmission line ij 2 ；
Analyzing to obtain the anchor pipe crimping quality coincidence proportionality coefficient of each crimping hardware fitting in each section of overhead transmission line
Wherein
The crimping quality of the anchor pipe of the jth crimping hardware fitting in the ith section of overhead transmission line is expressed as a coincidence proportionality coefficient, mu is expressed as a preset correction proportionality coefficient of the crimping quality of the anchor pipe, and mu is more than 0 and less than 1.
6. The overhead transmission line monitoring and early warning method based on the digitization technology as claimed in claim 5, which is characterized in that: analyzing the internal crimping quality parameters of each crimping hardware fitting in each section of overhead transmission line in the fifth step, wherein the concrete analysis further comprises:
extracting the number and the diameter of the standard wire strands corresponding to the overhead transmission line to be monitored, which are stored in an overhead transmission line database, and respectively marking the number and the diameter of the standard wire strands corresponding to the overhead transmission line to be monitored as q' Label 1 And q' Label 2 ；
Extracting standard wire clamp end distance and standard wire crimping length of crimping hardware corresponding to the to-be-monitored overhead transmission line stored in an overhead transmission line database, and respectively marking the standard wire clamp end distance and the standard wire crimping length of crimping hardware corresponding to the to-be-monitored overhead transmission line as q' Label 3 And q' Label 4 ；
Analyzing to obtain the lead crimping quality of each crimping hardware fitting in each section of overhead transmission line, wherein the lead crimping quality conforms to the proportionality coefficient
Wherein theta is ij The crimping quality of the wire expressed as the jth crimping hardware fitting in the ith section of overhead transmission line accords with a proportionality coefficient, sigma 1 、σ 2 、σ 3 、σ 4 Respectively expressed as preset crimping hardware fitting corresponding to the crimping quality influence factors of the number of broken strands of the lead, the diameter of the scattered strands of the lead, the clamping end distance of the lead and the crimping length of the lead, a ij q 1 、a ij q 2 、a ij q 3 、a ij q 4 Are respectively expressed as the jth crimping hardware fitting pair in the ith section of overhead transmission lineE is a natural constant, delta q is expressed by the number of broken strands of the wire, the diameter of scattered strands of the wire, the clamping end distance of the wire and the crimping length of the wire in the wire image Let 3 Expressed as the allowed wire clamp end distance deviation value corresponding to the preset press hardware.
7. The overhead transmission line monitoring and early warning method based on the digitization technology as claimed in claim 6, which is characterized in that: the obtaining mode of the internal crimping quality conformity index of each press fitting in each section of overhead transmission line in the fifth step is as follows:
the crimping quality of the anchor pipe of each crimping hardware fitting in each section of overhead transmission line accords with the proportionality coefficient
The quality of the wire crimping accords with the proportionality coefficient theta ij Substitution formula
Obtaining the internal crimping quality coincidence index psi of each crimping hardware fitting in each section of overhead transmission line i j Wherein epsilon 1 、ε 2 Respectively expressed as preset coincidence weight influence factors corresponding to the crimping quality of the anchor pipe and the crimping quality of the lead.
8. The overhead transmission line monitoring and early warning method based on the digitization technology as claimed in claim 1, wherein: and sixthly, evaluating the comprehensive quality coincidence coefficient of each crimping hardware fitting in each section of overhead transmission line, wherein the specific evaluation mode is as follows:
enabling the appearance quality of each crimping hardware fitting in each section of overhead transmission line to accord with an index xi i j And internal crimp quality compliance index psi i j Substitute crimping hardware fitting comprehensive quality conformity coefficient evaluation formula
Obtaining the comprehensive quality coincidence coefficient phi of each crimping hardware fitting in each section of overhead transmission line ij Wherein eta 1 、η 2 Respectively expressed as a preset crimping hardware appearance quality compensation factor and a crimping hardware internal crimping quality compensation factor.
9. The overhead transmission line monitoring and early warning method based on the digitization technology as claimed in claim 8, characterized in that: evaluating the comprehensive quality coincidence coefficient of each crimping hardware fitting in each section of overhead transmission line in the sixth step, and carrying out comparative analysis processing, wherein the method specifically comprises the following steps:
and comparing the comprehensive quality coincidence coefficient of each crimping hardware fitting in each section of overhead transmission line with a preset quality coincidence coefficient threshold value corresponding to the crimping hardware fitting of the overhead transmission line, if the comprehensive quality coincidence coefficient of a certain crimping hardware fitting in a certain section of overhead transmission line is smaller than the preset quality coincidence coefficient threshold value corresponding to the crimping hardware fitting of the overhead transmission line, indicating that the quality of the crimping hardware fitting in the certain section of overhead transmission line does not accord with the safety requirement of the overhead transmission line, extracting the number of the section of overhead transmission line, and sending the number to a power grid safety control center for early warning display.
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| CN117273472B (en) * | 2023-11-23 | 2024-02-09 | 合肥优尔电子科技有限公司 | Power grid operation risk monitoring management system |
| CN118294478A (en) * | 2024-06-06 | 2024-07-05 | 贵州电力建设监理咨询有限责任公司 | High-altitude crimping operation quality monitoring system for power grid infrastructure engineering |
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