CN117330912A - Insulation monitoring system for low-voltage cable - Google Patents

Insulation monitoring system for low-voltage cable Download PDF

Info

Publication number
CN117330912A
CN117330912A CN202311297639.6A CN202311297639A CN117330912A CN 117330912 A CN117330912 A CN 117330912A CN 202311297639 A CN202311297639 A CN 202311297639A CN 117330912 A CN117330912 A CN 117330912A
Authority
CN
China
Prior art keywords
voltage cable
low
target monitoring
soil
cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311297639.6A
Other languages
Chinese (zh)
Inventor
张亚羽
张华祥
张博
徐虹
贾欣烨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Shangqingyuan Electric Power Technology Co ltd
Original Assignee
Zhejiang Shangqingyuan Electric Power Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Shangqingyuan Electric Power Technology Co ltd filed Critical Zhejiang Shangqingyuan Electric Power Technology Co ltd
Priority to CN202311297639.6A priority Critical patent/CN117330912A/en
Publication of CN117330912A publication Critical patent/CN117330912A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24—Earth materials

Abstract

The invention discloses a low-voltage cable insulation monitoring system, which relates to the technical field of cable insulation monitoring and comprises a soil information acquisition module, a regional information monitoring module, a soil environment analysis module, a cable information acquisition module, a cable operation safety analysis module, a cable state safety analysis module, an early warning terminal and a database; by analyzing the soil environment state of the target monitoring low-voltage cable and analyzing the operation safety evaluation coefficient of the target monitoring low-voltage cable, the insulation state corresponding to the target monitoring low-voltage cable is judged, the defects in the prior art are overcome, multi-dimensional monitoring and analysis of low-voltage cable insulation are realized, the reliability of the low-voltage cable insulation monitoring result is greatly ensured, the safety of the soil environment when the low-voltage cable is buried is ensured, the safety of the low-voltage cable buried is improved, and meanwhile, the safety in the low-voltage cable installation area is also ensured.

Description

Insulation monitoring system for low-voltage cable
Technical Field
The invention relates to the technical field of cable insulation monitoring, in particular to a low-voltage cable insulation monitoring system.
Background
The low-voltage cable has a plurality of mounting modes, when the mounting mode of the low-voltage cable is direct buried underground, the low-voltage cable needs to be wrapped by using an insulating material, so that the direct contact between a wire and soil is prevented, the risks of electric leakage and short circuit are reduced, but the insulating material is influenced in the soil to cause damage, and therefore, the insulation of the low-voltage cable needs to be analyzed.
In the prior art, the insulation monitoring of the directly buried underground low-voltage cable mainly monitors the temperature in the low-voltage cable or dismantles the low-voltage cable under the condition of no load, and obviously, the monitoring modes have at least the following problems: 1. through monitoring the temperature of low-voltage cable, its monitoring content has certain unilateral nature, can't ensure the reliability of the insulating operation safety analysis result of low-voltage cable, on the other hand, dismantles when low-voltage cable does not have the load, great increase the complexity of monitoring process, also caused certain influence to low-voltage cable's operation simultaneously, also improved the insulating monitoring cost of low-voltage cable to a certain extent simultaneously.
1. The soil around the low-voltage cable influences insulation resistance, the change condition of the soil around the low-voltage cable is not monitored when the low-voltage cable is insulated in the prior art, so that the safety of the soil environment around the low-voltage cable cannot be guaranteed, on the other hand, the number of houses and the lateral surface of the space between the houses reflect the personnel activity condition in an area, when the houses are more and the space between the houses is smaller, the personnel activity in the area is illustrated, the influence on the soil environment is larger, the space between the number of houses and the houses is not monitored in the prior art, the change condition of the soil around the low-voltage cable cannot be accurately known, the damage speed of an insulation layer is accelerated, the cost of the low-voltage cable buried underground is also improved, the safety in the low-voltage cable installation area cannot be guaranteed, and the personnel electric shock danger is caused.
2. In order to ensure the buried safety of the low-voltage cable, the buried depth of the low-voltage cable needs to be set, and the soil surface can be changed due to the activity of surrounding personnel, so that the buried depth of the low-voltage cable is changed, but when the insulation of the low-voltage cable is monitored in the prior art, the depth of the low-voltage cable is not monitored, so that the influence of the ground activity of personnel on the insulation of the low-voltage cable is increased, the safety of the broken low-voltage cable insulating layer cannot be ensured, and the life of surrounding personnel is influenced.
Disclosure of Invention
In view of the above-mentioned technical shortcomings, the present invention aims to provide a system for monitoring insulation of a low-voltage cable, which can effectively solve the problems related to the above-mentioned background art.
In order to solve the technical problems, the invention adopts the following technical scheme: the invention provides a cable insulation monitoring system, comprising:
the soil information acquisition module is used for arranging each acquisition point in the target monitoring low-voltage cable, and further acquiring soil information corresponding to each acquisition point at a designated time point, wherein the soil information comprises soil water content, soil pH value and soil conductivity;
the regional information monitoring module is used for acquiring the number of houses and the positions of the houses in the target monitoring region corresponding to the target monitoring low-voltage cable at a designated time point;
the soil environment analysis module is used for analyzing soil change influence factors corresponding to the target monitoring low-voltage cables according to the number of houses in the target monitoring area corresponding to the target monitoring low-voltage cables and the positions of the houses, analyzing the change condition of the soil environment corresponding to the target monitoring low-voltage cables according to the soil information corresponding to the acquisition points to obtain soil environment change evaluation coefficients corresponding to the target monitoring low-voltage cables, and further calculating to obtain soil environment state evaluation coefficients corresponding to the target monitoring low-voltage cables;
the cable information acquisition module is used for acquiring the buried depth and the running temperature of the target monitoring cable at each acquisition point at a designated time point;
and the cable operation safety analysis module is used for analyzing and obtaining an operation safety evaluation coefficient corresponding to the target monitoring low-voltage cable based on the buried depth and the operation temperature corresponding to each acquisition point of the target monitoring low-voltage cable.
The cable state safety analysis module is used for judging whether the insulation state corresponding to the target monitoring low-voltage cable is safe or not according to the operation safety evaluation coefficient and the soil environment state evaluation coefficient corresponding to the target monitoring low-voltage cable, and sending a signal to the early warning terminal if the insulation state corresponding to the target monitoring low-voltage cable is in a dangerous state;
and the early warning terminal is used for carrying out early warning prompt when the insulation state corresponding to the target monitoring low-voltage cable is in a dangerous state.
Preferably, the number of houses and the positions of the houses in the target monitoring area corresponding to the target monitoring voltage cable are obtained at the designated time point, and the specific obtaining process is as follows:
a1, acquiring a center point corresponding to a target monitoring low-voltage cable, taking the center point of the target monitoring low-voltage cable as a circle center, taking a preset monitoring length as a radius as a circle, and taking an area in the circle as a target monitoring area corresponding to the target monitoring low-voltage cable;
a2, acquiring an image set of a target monitoring area corresponding to the target monitoring low-voltage cable through a camera carried by the unmanned aerial vehicle at a specified time point, and further acquiring the number of houses and the positions of all houses in the target monitoring area corresponding to the target monitoring low-voltage cable from the image set of the target monitoring area corresponding to the target monitoring low-voltage cable.
Preferably, the analyzing the soil change influencing factor corresponding to the target monitoring cable specifically includes the following steps: acquiring the position corresponding to the target monitoring low-voltage cable, further acquiring the distance between each house in the target monitoring low-voltage cable corresponding to the target monitoring low-voltage cable and each target monitoring area based on the position corresponding to the target monitoring low-voltage cable and the position of each house in the target monitoring area corresponding to the target monitoring low-voltage cable, and recording asJ represents the number corresponding to each house,；
by calculation formulaObtaining the soil change influencing factor corresponding to the target monitoring low-voltage cable>Wherein R represents the number of houses in the target monitoring area corresponding to the target monitoring cable,、/>respectively, the number of the reference houses, the spacing between the reference houses and the low-voltage cable are set, and the weight of the reference houses is->、/>Respectively the set number of houses and the weight factors corresponding to the spacing between the houses and the low-voltage cable.
Preferably, the analyzing the change condition of the soil environment corresponding to the target monitoring cable specifically includes the following steps:wherein->Representing soil environment change evaluation coefficient corresponding to target monitoring low-voltage cable, < ->、/>、/>Respectively represent the soil water content, the soil pH value and the soil corresponding to the ith collecting pointConductivity of soil, < >>、/>、/>Respectively representing the soil water content, the soil pH value and the soil conductivity of the ith acquisition point corresponding to the buried time point of the target monitoring low-voltage cable stored in the database, < + >>、Respectively indicates a designated time point, a cable buried time point, < >>、/>、/>Respectively preset allowable soil water content change rate, allowable soil pH value change rate, allowable soil conductivity change rate and +.>、/>、/>Respectively setting weight factors corresponding to soil water content, soil pH value and soil conductivity, wherein i represents the corresponding number of each acquisition point and +.>E represents a natural constant.
Preferably, the calculating obtains the soil environment state evaluation coefficient corresponding to the target monitoring cable, and the specific calculating process is as follows:
according to the calculation formulaObtaining the soil environment safety evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein w, pH and d are respectively preset soil allowable moisture content, soil allowable pH value, soil allowable conductivity and->、/>、/>Respectively setting a soil water content safety evaluation coefficient, a soil pH value safety evaluation coefficient and a weight factor corresponding to a soil conductivity safety evaluation coefficient;
by calculation formulaObtaining a soil environment state evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein->、/>Respectively setting a soil environment change evaluation coefficient and a weight factor corresponding to the soil environment safety evaluation coefficient.
Preferably, the operation safety evaluation coefficient corresponding to the target monitoring voltage cable is analyzed, and the specific analysis process is as follows:
substituting the buried depth and the running temperature of the target monitoring low-voltage cable corresponding to each acquisition point into a calculation formulaObtaining the operation safety evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein->、/>Respectively representing the corresponding buried depth and operating temperature of the target monitoring low-voltage cable at the ith acquisition point, and the +.>Representing the initial depth of the buried ground corresponding to the ith acquisition point of the target monitoring low-voltage cable stored in the database,/for the target monitoring low-voltage cable>For a set minimum safe buried depth of the cable, < > for>For a given allowable operating temperature of the cable,、/>respectively set weight factors corresponding to the buried depth and the running temperature.
Preferably, the judging target monitors whether the insulation state corresponding to the low-voltage cable is safe or not, and the specific judging process is as follows: evaluating the soil environment state corresponding to the target monitoring low-voltage cableAnd an operational safety assessment coefficient->Substitution of statistical formula +.>Obtaining insulation state evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein->、Respectively setting weight factors corresponding to the soil environment state evaluation coefficients and the operation safety evaluation coefficients;
comparing the insulation state evaluation coefficient corresponding to the target monitoring low-voltage cable with a preset insulation state evaluation coefficient threshold, if the insulation state evaluation coefficient corresponding to the target monitoring low-voltage cable is larger than or equal to the preset insulation state evaluation coefficient threshold, judging that the insulation state corresponding to the target monitoring low-voltage cable is in a safe state, otherwise, judging that the insulation state corresponding to the target monitoring low-voltage cable is in a dangerous state.
Preferably, the database is used for storing the buried time point of the target monitoring low-voltage cable, the soil water content, the soil pH value and the soil conductivity of each acquisition point corresponding to the buried time point of the target monitoring low-voltage cable, and the initial buried depth of the target monitoring low-voltage cable corresponding to each acquisition point.
The invention has the beneficial effects that: 1. according to the low-voltage cable insulation monitoring system, the soil environment state of the target monitoring low-voltage cable is analyzed, the operation safety evaluation coefficient of the target monitoring low-voltage cable is analyzed, and the insulation state corresponding to the target monitoring low-voltage cable is judged, so that the defects in the prior art are overcome, multi-dimensional monitoring and analysis of low-voltage cable insulation are realized, the reliability of the low-voltage cable insulation monitoring result is greatly ensured, and the buried safety of the low-voltage cable is improved.
2. According to the invention, the soil change influence factors corresponding to the target monitoring low-voltage cable are analyzed in the soil environment analysis module, so that the change condition of soil near the low-voltage cable is accurately known, and the change condition of soil environment corresponding to the target monitoring low-voltage cable is analyzed, so that the safety of the soil environment near the low-voltage cable is ensured, the damage speed of an insulating layer is reduced, the monitoring cost when the low-voltage cable is buried underground is reduced, the safety in the low-voltage cable installation area is ensured, and the electric shock danger of personnel is avoided.
3. According to the invention, the depth of the cable is monitored in the cable operation safety analysis module, so that the influence of ground activity on the insulation of the cable is mastered, the electric shock risk when the insulation layer of the low-voltage cable is damaged is reduced, and the influence on the life of surrounding personnel is also reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the system structure of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the insulation monitoring system for a low voltage cable includes: the system comprises a soil information acquisition module, a regional information monitoring module, a soil environment analysis module, a cable information acquisition module, a cable operation safety analysis module, a cable state safety analysis module, an early warning terminal and a database.
The soil environment analysis module is respectively connected with the database, the soil information acquisition module, the regional information monitoring module and the cable state safety analysis module, the cable operation safety analysis module is respectively connected with the cable information acquisition module, the database and the cable state safety analysis module, and the cable state safety analysis module is also connected with the early warning terminal.
The soil information acquisition module is used for arranging each acquisition point in the target monitoring low-voltage cable, and further acquiring soil information corresponding to each acquisition point at a designated time point, wherein the soil information comprises soil water content, soil pH value and soil conductivity;
the water content of the surface soil of each collecting point in the low-voltage cable is collected through the soil moisture monitor, the water content of the soil is taken as the water content of the soil of each collecting point, and the pH value and the conductivity of the surface soil of each collecting point in the low-voltage cable are collected through the soil pH value tester and the soil conductivity detector, and the water content of the soil is taken as the pH value and the conductivity of the soil of each collecting point.
The regional information monitoring module is used for acquiring the number of houses and the positions of the houses in a target monitoring region corresponding to the target monitoring low-voltage cable at a designated time point;
in a specific embodiment, the number of houses and the positions of each house in the target monitoring area corresponding to the target monitoring voltage cable are acquired at a designated time point, and the specific acquisition process is as follows:
a1, acquiring a center point corresponding to a target monitoring low-voltage cable, taking the center point of the target monitoring low-voltage cable as a circle center, taking a preset monitoring length as a radius as a circle, and taking an area in the circle as a target monitoring area corresponding to the target monitoring low-voltage cable;
a2, acquiring an image set of a target monitoring area corresponding to the target monitoring low-voltage cable through a camera carried by the unmanned aerial vehicle at a specified time point, and further acquiring the number of houses and the positions of all houses in the target monitoring area corresponding to the target monitoring low-voltage cable from the image set of the target monitoring area corresponding to the target monitoring low-voltage cable.
The soil environment analysis module is used for analyzing soil change influence factors corresponding to the target monitoring low-voltage cables according to the number of houses in the target monitoring area corresponding to the target monitoring low-voltage cables and the positions of the houses.
In a specific embodiment, the soil change influencing factors corresponding to the target monitoring cable are analyzed, and the specific analysis process is as follows: acquiring the position corresponding to the target monitoring low-voltage cable, further acquiring the distance between each house in the target monitoring low-voltage cable corresponding to the target monitoring low-voltage cable and each target monitoring area based on the position corresponding to the target monitoring low-voltage cable and the position of each house in the target monitoring area corresponding to the target monitoring low-voltage cable, and recording asJ represents the number corresponding to each house, +.>；
By calculation formulaObtaining the soil change influencing factor corresponding to the target monitoring low-voltage cable>Wherein R represents the number of houses in the target monitoring area corresponding to the target monitoring cable,、/>respectively, the number of the reference houses, the spacing between the reference houses and the low-voltage cable are set, and the weight of the reference houses is->、/>Respectively the set number of houses and the weight factors corresponding to the spacing between the houses and the low-voltage cable.
The soil environment analysis module is further used for analyzing the change condition of the soil environment corresponding to the target monitoring low-voltage cable according to the soil information corresponding to each acquisition point to obtain a soil environment change evaluation coefficient corresponding to the target monitoring low-voltage cable, and further calculating to obtain a soil environment state evaluation coefficient corresponding to the target monitoring low-voltage cable.
In another specific embodiment, the change condition of the soil environment corresponding to the target monitoring cable is analyzed, and the specific analysis process is as follows:wherein->Representing soil environment change evaluation coefficient corresponding to target monitoring low-voltage cable, < ->、/>、/>Respectively represents the soil water content, the soil pH value and the soil conductivity corresponding to the ith acquisition point,/>、/>、/>Respectively representing the soil water content, the soil pH value and the soil conductivity of the ith acquisition point corresponding to the buried time point of the target monitoring low-voltage cable stored in the database, < + >>、Respectively represent the designationTime point, cable time point, and +.>、/>、/>Respectively preset allowable soil water content change rate, allowable soil pH value change rate, allowable soil conductivity change rate and +.>、/>、/>Respectively setting weight factors corresponding to soil water content, soil pH value and soil conductivity, wherein i represents the corresponding number of each acquisition point and +.>E represents a natural constant.
In another specific embodiment, the soil environment state evaluation coefficient corresponding to the target monitoring cable is obtained through calculation, and the specific calculation process is as follows:
according to the calculation formulaObtaining the soil environment safety evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein w, pH and d are respectively preset soil allowable moisture content, soil allowable pH value, soil allowable conductivity and->、/>、/>Respectively setting a soil water content safety evaluation coefficient, a soil pH value safety evaluation coefficient and a weight factor corresponding to a soil conductivity safety evaluation coefficient;
by calculation formulaObtaining a soil environment state evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein->、/>Respectively setting a soil environment change evaluation coefficient and a weight factor corresponding to the soil environment safety evaluation coefficient.
According to the invention, the soil change influence factors corresponding to the target monitoring low-voltage cable are analyzed in the soil environment analysis module, so that the change condition of soil near the low-voltage cable is accurately known, and the change condition of soil environment corresponding to the target monitoring low-voltage cable is analyzed, so that the safety of the soil environment near the low-voltage cable is ensured, the damage speed of an insulating layer is reduced, the monitoring cost when the low-voltage cable is buried underground is reduced, the safety in the low-voltage cable installation area is ensured, and the electric shock danger of personnel is avoided.
The cable information acquisition module is used for acquiring the buried depth and the running temperature of the target monitoring cable at each acquisition point at a designated time point;
it should be noted that, the intelligent length measuring instrument is used for acquiring the buried depth corresponding to each acquisition point of the target monitoring low-voltage cable at a specified time point, and the infrared sensor is used for acquiring the running temperature corresponding to each acquisition point of the target monitoring low-voltage cable at a specified time point.
The cable operation safety analysis module is used for analyzing and obtaining operation safety assessment coefficients corresponding to the target monitoring low-voltage cable based on the buried depth and the operation temperature corresponding to each acquisition point of the target monitoring low-voltage cable.
In a specific embodiment, the operation safety evaluation coefficient corresponding to the target monitoring low-voltage cable is analyzed, and the specific analysis process is as follows:
substituting the buried depth and the running temperature of the target monitoring low-voltage cable corresponding to each acquisition point into a calculation formulaObtaining the operation safety evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein->、/>Respectively representing the corresponding buried depth and operating temperature of the target monitoring low-voltage cable at the ith acquisition point, and the +.>Representing the initial depth of the buried ground corresponding to the ith acquisition point of the target monitoring low-voltage cable stored in the database,/for the target monitoring low-voltage cable>For a set minimum safe buried depth of the cable, < > for>For a set permissible operating temperature of the cable, +.>、/>Respectively set weight factors corresponding to the buried depth and the running temperature.
According to the invention, the depth of the cable is monitored in the cable operation safety analysis module, so that the influence of ground activity on the insulation of the cable is mastered, the electric shock risk when the insulation layer of the low-voltage cable is damaged is reduced, and the influence on the life of surrounding personnel is also reduced.
The cable state safety analysis module is used for judging whether the insulation state corresponding to the target monitoring low-voltage cable is safe or not according to the operation safety evaluation coefficient and the soil environment state evaluation coefficient corresponding to the target monitoring low-voltage cable, and sending a signal to the early warning terminal if the insulation state corresponding to the target monitoring low-voltage cable is in a dangerous state;
in a specific embodiment, whether the insulation state corresponding to the target monitoring low-voltage cable is safe or not is judged, and the specific judging process is as follows: evaluating the soil environment state corresponding to the target monitoring low-voltage cableAnd an operational safety assessment coefficientSubstitution of statistical formula +.>Obtaining the insulation state evaluation coefficient corresponding to the target monitoring low-voltage cableWherein->、/>Respectively setting weight factors corresponding to the soil environment state evaluation coefficients and the operation safety evaluation coefficients;
comparing the insulation state evaluation coefficient corresponding to the target monitoring low-voltage cable with a preset insulation state evaluation coefficient threshold, if the insulation state evaluation coefficient corresponding to the target monitoring low-voltage cable is larger than or equal to the preset insulation state evaluation coefficient threshold, judging that the insulation state corresponding to the target monitoring low-voltage cable is in a safe state, otherwise, judging that the insulation state corresponding to the target monitoring low-voltage cable is in a dangerous state.
And the early warning terminal is used for carrying out early warning prompt when the insulation state corresponding to the target monitoring low-voltage cable is in a dangerous state.
The database is used for storing the buried time point of the target monitoring low-voltage cable, the soil water content, the soil pH value and the soil conductivity of each acquisition point corresponding to the buried time point of the target monitoring low-voltage cable, and the initial buried depth of the target monitoring low-voltage cable corresponding to each acquisition point.
According to the embodiment of the invention, the soil environment state of the target monitoring low-voltage cable is analyzed, the operation safety evaluation coefficient of the target monitoring low-voltage cable is analyzed, and the insulation state corresponding to the target monitoring low-voltage cable is judged, so that the defects in the prior art are overcome, the multi-dimensional monitoring and analysis of the insulation of the low-voltage cable are realized, the reliability of the insulation monitoring result of the low-voltage cable is greatly ensured, and the buried safety of the low-voltage cable is improved.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (8)

1. The utility model provides a low tension cable insulation monitoring system which characterized in that includes:
the soil information acquisition module is used for arranging each acquisition point in the target monitoring low-voltage cable, and further acquiring soil information corresponding to each acquisition point at a designated time point, wherein the soil information comprises soil water content, soil pH value and soil conductivity;
the regional information monitoring module is used for acquiring the number of houses and the positions of the houses in the target monitoring region corresponding to the target monitoring low-voltage cable at a designated time point;
the soil environment analysis module is used for analyzing soil change influence factors corresponding to the target monitoring low-voltage cables according to the number of houses in the target monitoring area corresponding to the target monitoring low-voltage cables and the positions of the houses, analyzing the change condition of the soil environment corresponding to the target monitoring low-voltage cables according to the soil information corresponding to the acquisition points to obtain soil environment change evaluation coefficients corresponding to the target monitoring low-voltage cables, and further calculating to obtain soil environment state evaluation coefficients corresponding to the target monitoring low-voltage cables;
the cable information acquisition module is used for acquiring the buried depth and the running temperature of the target monitoring cable at each acquisition point at a designated time point;
the cable operation safety analysis module is used for analyzing and obtaining an operation safety evaluation coefficient corresponding to the target monitoring low-voltage cable based on the buried depth and the operation temperature corresponding to each acquisition point of the target monitoring low-voltage cable;
the cable state safety analysis module is used for judging whether the insulation state corresponding to the target monitoring low-voltage cable is safe or not according to the operation safety evaluation coefficient and the soil environment state evaluation coefficient corresponding to the target monitoring low-voltage cable, and sending a signal to the early warning terminal if the insulation state corresponding to the target monitoring low-voltage cable is in a dangerous state;
and the early warning terminal is used for carrying out early warning prompt when the insulation state corresponding to the target monitoring low-voltage cable is in a dangerous state.
2. The system for monitoring insulation of a low-voltage cable according to claim 1, wherein the acquiring the number of houses and the positions of each house in the target monitoring area corresponding to the target monitoring low-voltage cable at the designated time point comprises the following steps:
a1, acquiring a center point corresponding to a target monitoring low-voltage cable, taking the center point of the target monitoring low-voltage cable as a circle center, taking a preset monitoring length as a radius as a circle, and taking an area in the circle as a target monitoring area corresponding to the target monitoring low-voltage cable;
a2, acquiring an image set of a target monitoring area corresponding to the target monitoring low-voltage cable through a camera carried by the unmanned aerial vehicle at a specified time point, and further acquiring the number of houses and the positions of all houses in the target monitoring area corresponding to the target monitoring low-voltage cable from the image set of the target monitoring area corresponding to the target monitoring low-voltage cable.
3. The insulation monitoring system for the low-voltage cable according to claim 1, wherein the analysis of the soil change influence factor corresponding to the target monitoring low-voltage cable is performed by the following specific analysis process: acquiring the position corresponding to the target monitoring low-voltage cable, further acquiring the distance between each house in the target monitoring low-voltage cable corresponding to the target monitoring low-voltage cable and each target monitoring area based on the position corresponding to the target monitoring low-voltage cable and the position of each house in the target monitoring area corresponding to the target monitoring low-voltage cable, and recording asJ represents the number corresponding to each house, +.>；
By calculation formulaObtaining the soil change influencing factor corresponding to the target monitoring low-voltage cable>Wherein R represents the number of houses in the target monitoring area corresponding to the target monitoring cable, < ->、/>Respectively, the number of the reference houses, the spacing between the reference houses and the low-voltage cable are set, and the weight of the reference houses is->、/>Respectively the set number of houses and the weight factors corresponding to the spacing between the houses and the low-voltage cable.
4. The insulation monitoring system for the low-voltage cable according to claim 3, wherein the analysis of the change condition of the soil environment corresponding to the target monitoring low-voltage cable is performed by the following specific analysis process:wherein->Representing soil environment change evaluation coefficient corresponding to target monitoring low-voltage cable, < ->、/>、/>Respectively represents the soil water content, the soil pH value and the soil conductivity corresponding to the ith acquisition point,/>、/>、/>Respectively representing the soil water content, the soil pH value and the soil conductivity of the ith acquisition point corresponding to the buried time point of the target monitoring low-voltage cable stored in the database, < + >>、/>Respectively indicates a designated time point, a cable buried time point, < >>、/>、/>Respectively preset allowable soil water content change rate, allowable soil pH value change rate, allowable soil conductivity change rate and +.>、/>、/>Respectively setting weight factors corresponding to soil water content, soil pH value and soil conductivity, wherein i represents the corresponding number of each acquisition point and +.>E represents a natural constant.
5. The insulation monitoring system for the low-voltage cable according to claim 4, wherein the soil environment state evaluation coefficient corresponding to the target monitoring low-voltage cable is obtained by calculation, and the specific calculation process is as follows:
according to the calculation formulaObtaining the soil environment safety evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein w is,The pH value and the d are respectively the preset soil permissible water content, the soil permissible pH value and the soil permissible conductivity, and the +.>、/>、/>Respectively setting a soil water content safety evaluation coefficient, a soil pH value safety evaluation coefficient and a weight factor corresponding to a soil conductivity safety evaluation coefficient;
by calculation formulaObtaining a soil environment state evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein->、/>Respectively setting a soil environment change evaluation coefficient and a weight factor corresponding to the soil environment safety evaluation coefficient.
6. The insulation monitoring system for the low-voltage cable according to claim 5, wherein the operation safety evaluation coefficient corresponding to the target monitoring low-voltage cable is analyzed by the following specific analysis process:
substituting the buried depth and the running temperature of the target monitoring low-voltage cable corresponding to each acquisition point into a calculation formulaObtaining the operation safety evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein->、/>Respectively representing the corresponding buried depth and operating temperature of the target monitoring low-voltage cable at the ith acquisition point, and the +.>Representing the initial depth of the buried ground corresponding to the ith acquisition point of the target monitoring low-voltage cable stored in the database,/for the target monitoring low-voltage cable>For a set minimum safe buried depth of the cable, < > for>For a set permissible operating temperature of the cable, +.>、/>Respectively set weight factors corresponding to the buried depth and the running temperature.
7. The insulation monitoring system for a low-voltage cable according to claim 6, wherein the determining whether the insulation state corresponding to the target monitoring low-voltage cable is safe or not comprises the following specific determining process: evaluating the soil environment state corresponding to the target monitoring low-voltage cableAnd an operational safety assessment coefficient->Substitution intoStatistical formula->Obtaining insulation state evaluation coefficient corresponding to the target monitoring low-voltage cable>Wherein->、/>Respectively setting weight factors corresponding to the soil environment state evaluation coefficients and the operation safety evaluation coefficients;
comparing the insulation state evaluation coefficient corresponding to the target monitoring low-voltage cable with a preset insulation state evaluation coefficient threshold, if the insulation state evaluation coefficient corresponding to the target monitoring low-voltage cable is larger than or equal to the preset insulation state evaluation coefficient threshold, judging that the insulation state corresponding to the target monitoring low-voltage cable is in a safe state, otherwise, judging that the insulation state corresponding to the target monitoring low-voltage cable is in a dangerous state.
8. The insulation monitoring system of low voltage cable according to claim 1, further comprising a database for storing the time point of the target low voltage cable buried, the soil moisture content, the soil pH value and the soil conductivity of each collection point corresponding to the time point of the target low voltage cable buried, and the initial depth of the target low voltage cable buried at each collection point.
CN202311297639.6A 2023-10-09 2023-10-09 Insulation monitoring system for low-voltage cable Pending CN117330912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311297639.6A CN117330912A (en) 2023-10-09 2023-10-09 Insulation monitoring system for low-voltage cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311297639.6A CN117330912A (en) 2023-10-09 2023-10-09 Insulation monitoring system for low-voltage cable

Publications (1)

Publication Number Publication Date
CN117330912A true CN117330912A (en) 2024-01-02

Family

ID=89282545

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311297639.6A Pending CN117330912A (en) 2023-10-09 2023-10-09 Insulation monitoring system for low-voltage cable

Country Status (1)

Country Link
CN (1) CN117330912A (en)

Similar Documents

Publication Publication Date Title
CN109443440A (en) Tunnel comprehensive monitoring system
US10203293B2 (en) Method for lightning stroke identification and location on optical fiber composite overhead ground wire
CN104280637A (en) Lightning arrester online monitoring signal collection device with shielding function
CN103528701A (en) Online monitoring system for temperature and current carrying capacity of power cable
CN209055141U (en) Tunnel comprehensive monitoring system
CN114994460A (en) Cable insulation performance prediction device and method
CN204065293U (en) With the lightning arrester on-Line Monitor Device of function of shielding
CN117330912A (en) Insulation monitoring system for low-voltage cable
CN207817105U (en) A kind of electric transmission line isolator pollution flashover automatic visual observation system
CN204065294U (en) With the lightning arrester line monitor signal harvester of function of shielding
CN205749757U (en) Cable aging diagnosis system
CN1987500A (en) On-line monitoring system method for overhead line by potential method
CN114279492A (en) Method and device for determining cable fault information based on different fault parameter records
CN109186786B (en) Device and method for monitoring whether electrical contact of electrical equipment is overheated
CN115394029A (en) Forest fire early warning system and method
CN213715036U (en) Combustible and soil moisture content monitoring facilities
CN212181599U (en) Electric line fire early warning terminal
CN114613540A (en) Cable external damage prevention monitoring method, system, device and storage medium
CN111666705A (en) Finite element analysis-based lead sag detection method and system
CN113945244B (en) Soil state monitoring device for direct-buried GIL fault early warning
CN203479416U (en) Power cable temperature and current-carrying capacity online monitoring system
CN203443630U (en) Tailing pond water level automatic monitoring and early warning system
BR102016016197A2 (en) INSULATOR FAULT SIGNALING SYSTEM IN HIGH-VOLTAGE STRUCTURES USING ULTRASOUND.
CN214335130U (en) Cable insulation abnormity positioning system
CN117890827A (en) Intelligent monitoring system for operation of insulated tubular bus based on visualization

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination