CN118362817B - Monitoring method for cable duct based on power grid model, cable duct and storage medium - Google Patents
Monitoring method for cable duct based on power grid model, cable duct and storage medium Download PDFInfo
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- CN118362817B CN118362817B CN202410780451.5A CN202410780451A CN118362817B CN 118362817 B CN118362817 B CN 118362817B CN 202410780451 A CN202410780451 A CN 202410780451A CN 118362817 B CN118362817 B CN 118362817B
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- 238000001514 detection method Methods 0.000 claims abstract description 152
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- 238000012806 monitoring device Methods 0.000 claims 3
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/02—Installations of electric cables or lines in or on the ground or water laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tile
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention provides a monitoring method of a cable duct based on a power grid model, the cable duct and a storage medium, wherein each cable support is provided with a detection route in a surrounding mode, each detection point is provided with an equivalent resistor and a magnet, and the monitoring method comprises the following steps: establishing a power grid model based on a fault sample set of cable trench operation; acquiring magnetic field intensities flowing through a plurality of detection points, and performing difference processing on the magnetic field intensities according to a first preset relationship through a power grid model to obtain a first magnetic field intensity difference set; if k1 is more than 0 and less than or equal to a1, respectively acquiring a plurality of corresponding first target detection points with the difference value larger than a preset magnetic field strength value, and determining the fault type of the cable pit according to the voltages at the plurality of first target detection points through a power grid model; if k1 is greater than a1, performing difference processing on the magnetic field intensities according to a second preset relation to obtain a second magnetic field intensity difference set, and determining the fault type of the cable trench according to the second magnetic field intensity difference set through a power grid model.
Description
Technical Field
The invention relates to the technical field of cable ditches, in particular to a monitoring method of a cable ditch based on a power grid model, the cable ditch and a storage medium.
Background
In the present day of high-speed development, the number of power transmission and distribution lines is gradually increased, but because the cable trench is mostly underground, and long-time operation leads to external insulation aging discharge of the cable, water and moisture accumulated in the cable trench, and combustible gases such as methane generated by decomposing animal and plant carcasses in the cable trench are accumulated, the underground cable trench can be finally possibly caused to generate fire explosion. And the underground cable trench has a narrow and complex internal environment, and is particularly difficult for workers to inspect. Accordingly, various advanced underground cable trench detection apparatuses and detection methods have been developed.
However, the existing detection method has the problem that the fault type cannot be accurately identified, and accordingly the maintenance time is too long.
Disclosure of Invention
The invention solves the problem that the existing cable pit monitoring method cannot accurately identify the fault type.
In order to solve the above-mentioned problems, the present invention provides a method for monitoring a cable duct based on a power grid model, where the cable duct includes a first duct wall and a second duct wall that are disposed opposite to each other, each of the first duct wall and the second duct wall is provided with an L-layer cable support, each of the cable supports is provided with a detection route in a surrounding manner, a plurality of detection routes are connected in parallel, each of the detection routes includes a plurality of detection points, and each of the detection points is provided with an equivalent resistor and a magnet, the method includes:
Establishing a power grid model based on a fault sample set of cable trench operation;
acquiring magnetic field intensities at a plurality of detection points, and performing difference processing on the magnetic field intensities according to a first preset relationship through the power grid model to obtain a first magnetic field intensity difference set;
if 0 is less than k 1≤a1, respectively acquiring a plurality of corresponding first target detection points with the difference value being greater than a preset value of the magnetic field intensity, and determining the fault type of the cable pit according to the voltages at the plurality of first target detection points through the power grid model;
If k 1>a1 is found, performing difference processing on the magnetic field intensities according to a second preset relationship to obtain a second magnetic field intensity difference set, and determining the fault type of the cable trench according to the second magnetic field intensity difference set through the power grid model;
Wherein k 1 is the number of the first magnetic field intensity difference value set greater than a magnetic field intensity preset value, and a 1 is the first preset value.
Optionally, the determining, by the grid model, the fault type of the cable pit according to the voltages at the plurality of first target detection points includes:
acquiring voltages at a plurality of first target detection points;
Performing difference operation on first voltages at a plurality of first target detection points of the first trench wall and second voltages at a plurality of first target detection points of the second trench wall in a one-to-one correspondence manner to obtain a first voltage difference set;
If the number of the first voltage difference values which are concentrated and larger than the voltage preset value is larger than a second preset value, determining that the cable trench has a breakage fault;
And if the number of the first voltage difference values which are larger than the voltage preset value in the set is smaller than or equal to the second preset value, analyzing according to the voltages at all the detection points to determine the fault type of the cable pit.
Optionally, the analyzing according to the voltages at all the detection points to determine the fault type of the cable pit includes:
acquiring voltages at all the detection points;
Performing a difference operation on voltages at a plurality of detection points of the first trench wall, and performing a difference operation on voltages at a plurality of detection points of the second trench wall to obtain a second voltage difference set;
If the number of the second voltage difference values which are larger than the voltage preset value in a concentrated manner is larger than a third preset value, determining that the cable trench has an inclination fault;
If the number of the second voltage difference values which are larger than the voltage preset value in a concentrated mode is smaller than or equal to a third preset value, the cable trench is determined to have a breakage fault.
Optionally, the determining, by the grid model, the fault type of the cable pit according to the second set of magnetic field strength differences includes:
Acquiring the second magnetic field intensity difference set;
If the number of the second magnetic field intensity difference values which are more than the magnetic field intensity preset values in a concentrated manner is smaller than or equal to a fourth preset value, determining that the cable trench has individual inclination faults;
and if the number of the second magnetic field intensity difference values which are concentrated and larger than the magnetic field intensity preset value is larger than a fourth preset value, determining that the cable trench has an integral inclination fault.
Optionally, the performing difference processing on the magnetic field intensities according to a first preset relationship to obtain a first magnetic field intensity difference set includes:
acquiring a first magnetic field intensity data set of all detection points on the first trench wall;
acquiring a second magnetic field intensity data set of all detection points on the second trench wall;
and performing difference operation on the magnetic field intensity data in the first magnetic field intensity data set and the second magnetic field intensity data set in a one-to-one correspondence manner to obtain a first magnetic field intensity difference value set.
Optionally, the performing the difference processing on the magnetic field intensities according to the second preset relationship to obtain a second magnetic field intensity difference set includes:
acquiring a first magnetic field intensity data set of all detection points on the first trench wall;
acquiring a second magnetic field intensity data set of all detection points on the second trench wall;
And performing difference operation on the first magnetic field intensity data sets on the first trench wall, and performing difference operation on the second magnetic field intensity data sets on the second trench wall to obtain the second magnetic field intensity difference set.
Optionally, the building the power grid model based on the fault sample set of the cable trench operation includes:
inputting the statistical data time range, the fault times, the magnetic field intensity and the voltage into the power grid model to generate historical fault density distribution data of the cable trench;
And controlling the power grid model to inquire the faults existing in the cable trench at present according to the historical fault density distribution data at intervals of a first preset time, inquiring the faults which occur in the cable trench in the history at intervals of a second preset time, inquiring the faults which occur in the cable trench and are eliminated at intervals of a third preset time, judging and positioning the faults according to the acquired information, and sending an alarm signal if the fault type is found, wherein the first preset time is smaller than the second preset time, and the second preset time is smaller than the third preset time.
The embodiment of the application also provides a cable duct, which comprises:
The device comprises a first ditch wall and a second ditch wall which are oppositely arranged, wherein the first ditch wall and the second ditch wall are respectively provided with L layers of cable brackets, each cable bracket is provided with a detection route in a surrounding way, a plurality of detection routes are connected in parallel, each detection route comprises a plurality of detection points, and each detection point is provided with an equivalent resistor and a magnet;
the processor is connected with the detection point and is used for establishing a power grid model based on a fault sample set of cable trench operation;
acquiring magnetic field intensities at a plurality of detection points, and performing difference processing on the magnetic field intensities according to a first preset relationship through the power grid model to obtain a first magnetic field intensity difference set;
if 0 is less than k 1≤a1, respectively acquiring a plurality of corresponding first target detection points with the difference value being greater than a preset value of the magnetic field intensity, and determining the fault type of the cable pit according to the voltages at the plurality of first target detection points through the power grid model;
If k 1>a1 is found, performing difference processing on the magnetic field intensities according to a second preset relationship to obtain a second magnetic field intensity difference set, and determining the fault type of the cable trench according to the second magnetic field intensity difference set through the power grid model;
Wherein k 1 is the number of the first magnetic field intensity difference value set greater than a magnetic field intensity preset value, and a 1 is the first preset value.
Optionally, the cable trench is further provided with a plurality of holders, the holders are vertically disposed on the cable bracket, each holder is provided with a detection point and a magnet, a wire harness of the detection point is disposed around the magnet, so that when the voltage at the detection point is increased, the magnetic field strength of the magnet is enhanced, and the detection route further includes an electromagnetic sensor, and the electromagnetic sensor is fixedly disposed on the cable bracket so as to detect the magnetic field strength at the detection point.
The embodiment of the application also provides a readable storage medium, wherein the readable storage medium stores a program or instructions, and the program or instructions implement the steps of the monitoring method according to any one of the above when being executed by a processor.
According to the cable trench monitoring method based on the power grid model, the power grid model is built based on the fault sample set of the cable trench operation, the first magnetic field intensity difference set is obtained by carrying out difference processing on the magnetic field intensity at each detection point according to the first preset relation, and the second judgment mode is further selected by judging the number of the first magnetic field intensity difference set larger than the first preset value, namely the fault type is determined by the mode of combining the two magnetic field intensity difference sets or the mode of combining the magnetic field intensity and the voltage, so that the accuracy of judging the fault type is improved.
Drawings
Fig. 1 is a schematic flow chart of a method for monitoring a cable duct based on a power grid model according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of determining a fault type of a cable pit according to voltages of a plurality of first target detection points in the monitoring method shown in FIG. 1;
fig. 3 is a schematic flow chart of determining the fault type of the cable pit according to the voltages at all the detection points in the monitoring method shown in fig. 1.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Because the internal environment of the underground cable trench is narrow and complicated, the inspection by workers is particularly difficult, and after the cable is broken, the problems of short circuit, electric leakage and the like are easy to occur in the current, and the problems can cause current blocking, so that the resistance is increased and the voltage is reduced. In addition, the cable skin breakage can lead to the line resistance to become great, and the resistance of circuit is inhomogeneous, leads to the voltage drop also can be more obvious.
In addition, the cable trench is usually directly laid in soil, however, the soil is easily affected by groundwater and ground objects to be settled, and when the soil under the cable trench is settled, the cable trench is also settled, and finally the cable in the cable trench is twisted and pulled, so that the cable is heated or broken, and even serious accidents are caused. In some embodiments, the cable racks disposed on the first trench wall and the second trench wall may be individually inclined for other reasons, so that the damage faults and the inclination faults of the cable trench need to be identified in advance and the user is reminded of timely repair.
Therefore, the embodiment of the application provides a cable trench monitoring method based on a power grid model, a cable trench and a storage medium, so as to solve the problems.
Referring to fig. 1, fig. 1 is a flow chart of a method for monitoring a cable trench based on a power grid model according to an embodiment of the present application. The embodiment of the application provides a monitoring method of a cable trench based on a power grid model, wherein the cable trench comprises a first trench wall and a second trench wall which are oppositely arranged, the first trench wall and the second trench wall are respectively provided with an L-layer cable support, each cable support is circumferentially provided with a detection route, a plurality of detection routes are connected in parallel, each detection route comprises a plurality of detection points, and each detection point is provided with an equivalent resistor and a magnet, and the monitoring method comprises the following steps:
110. and establishing a power grid model based on the fault sample set of the cable trench operation.
And obtaining a fault sample set of the cable pit operation, wherein the fault sample set at least comprises an original sample input as a cable pit safety analysis machine learning model, and training an initial power grid model according to the fault sample set to establish a power grid model.
The statistical data time range, the fault times, the magnetic field intensity and the voltage are input into the power grid model to generate historical fault density distribution data of the cable trench, the power grid model is controlled to inquire faults existing in the cable trench at present according to the historical fault density distribution data at intervals of a first preset time, inquire faults which occur in the cable trench in history at intervals of a second preset time, inquire faults which occur in the cable trench and are eliminated at intervals of a third preset time, fault judgment and positioning are carried out according to collected information, and if the fault type is found, an alarm signal is sent out, wherein the first preset time is smaller than the second preset time, and the second preset time is smaller than the third preset time. By carrying out time-sharing inquiry on the current faults, the faults which occur in the history and the faults which occur and are eliminated in the cable pit according to the historical fault density distribution data in the power grid model, the timeliness of monitoring can be ensured, the energy consumption can be reduced, and the cost is saved.
In some embodiments, the power grid model can convert the calculation result into a standard value in the modeling process, so that the fault density of the area is displayed in a specified color, and a user can know the situation of the cable trench more intuitively and clearly.
120. Acquiring magnetic field intensities at a plurality of detection points, and performing difference processing on the magnetic field intensities according to a first preset relationship through a power grid model to obtain a first magnetic field intensity difference set.
Specifically, a first magnetic field intensity data set of a detection point on a first ditch wall is obtained, a second magnetic field intensity data set of a detection point on a second ditch wall is obtained, and the magnetic field intensity data in the first magnetic field intensity data set and the second magnetic field intensity data set are subjected to one-to-one correspondence difference operation to obtain a first magnetic field intensity difference value set.
Illustratively, the first set of magnetic field strength differences a12 (a 11-a21, a12-a22, a13-a23, a14-a24, a.1 n) is obtained assuming that the first set of magnetic field strength data for the detection point on the first trench wall is A1 (a 11, a12, a13, a 14..a 1 n) and the second set of magnetic field strength data for the detection point on the second trench wall is A2 (a 21, a22, a23, a24, a..2 n).
The cable trench is further provided with a plurality of supporting frames, the supporting frames are vertically arranged on the cable support, each supporting frame is provided with a detection point and a magnet, the wire harness of each detection point is arranged around the magnet, and when the voltage at the detection point is increased, the magnetic field intensity of the magnet is enhanced. The detection route also comprises an electromagnetic sensor which is fixedly arranged on the cable bracket so as to detect the magnetic field intensity at the detection point. The magnetic field intensity at the corresponding first target detection point is detected by an electromagnetic sensor provided at each first target detection point so as to further determine the type of fault occurring at the first target detection point.
It is clear that when the voltage increases, the magnetic field strength increases, and when the voltage decreases, the magnetic field strength decreases; when the detection point is inclined, the distance between the magnet and the electromagnetic sensor changes, so that the magnetic field strength also changes, specifically, when the distance between the magnet and the electromagnetic sensor becomes smaller, the magnetic field strength becomes smaller; when the distance between the magnet and the electromagnetic sensor increases, the magnetic field strength increases.
130. If 0 is less than k 1≤a1, respectively acquiring a plurality of corresponding first target detection points with the difference value being greater than a preset value of the magnetic field intensity, and determining the fault type of the cable pit according to the voltages at the plurality of first target detection points through the power grid model.
Wherein k 1 is the number of the first magnetic field intensity difference value set greater than the magnetic field intensity preset value, and a 1 is the first preset value.
It is understood that 0 < k 1≤a1 indicates that the number of the magnetic field intensity difference values concentrated to be larger than the preset magnetic field intensity value is smaller than the first preset value, that is, the abnormal magnetic field intensity exists in the magnetic field intensity, and the number of the abnormal magnetic field intensity is not large, so that the situation that the magnetic field intensity is possibly increased or decreased is indicated. The change in magnetic field strength may be a change in voltage at the sensing point or a tilt at the sensing point. Therefore, if it is required to further confirm that the cable duct is a breakage fault, an inclination fault, or a measurement error, it is required to acquire a plurality of corresponding first target detection points with differences greater than a preset value of the magnetic field strength, and further determine the cable duct according to voltages at the plurality of first target detection points, so that a situation of misjudgment is avoided, and accuracy of determining the fault type is improved.
The specific manner of determining the fault type of the cable pit according to the voltages at the plurality of first target detection points through the power grid model may be continued with reference to fig. 2, and fig. 2 is a schematic flow diagram of determining the fault type of the cable pit according to the voltages at the plurality of first target detection points in the monitoring method shown in fig. 1; the specific flow is as follows:
131. voltages at a plurality of first target detection points are acquired.
The cable trench is also provided with a plurality of voltage sensors, and one voltage sensor is arranged at one detection point and used for testing the voltages at two ends of the equivalent resistor corresponding to each detection point.
The voltage at each first target detection point is acquired by a voltage sensor at a plurality of first target detection points.
132. And performing difference operation on the first voltages at the first target detection points of the first trench wall and the second voltages at the first target detection points of the second trench wall in a one-to-one correspondence manner to obtain a first voltage difference set.
Illustratively, the first set of voltage difference values B12 (B11-B21, B12-B22, B13-B23, B14-B24, B1 n) is obtained assuming that the first voltage across the first target detection point on the first trench wall is B1 (B11, B12, B13, B14..b 1 n) and the second voltage across the first target detection point on the second trench wall is B2 (B21, B22, B23, B24..b 2 n).
The one-to-one correspondence relationship may be a relationship set according to a plurality of parallel directions, for example, if a direction from the target detection point at the first voltage b11 to the target detection point at the first voltage b21 is a first direction, and a direction from the target detection point at the first voltage b12 to the target detection point at the first voltage b22 is a second direction, the first direction is parallel to the second direction.
133. If the number of the first voltage difference values which are concentrated and larger than the voltage preset value is larger than the second preset value, the cable trench is determined to have damage faults.
If the number of the first voltage difference values is greater than the voltage preset value and is greater than the second preset value, the fact that the voltage is greater or smaller than the voltage is detected in the first target detection points is indicated, and the number of the first voltage difference values is greater than the second preset value, the situation that detection errors occur can be eliminated, and the change of voltage transformation can be caused due to breakage, so that breakage faults of the cable trench can be determined.
134. If the number of the first voltage difference values which are larger than the voltage preset value in the set is smaller than or equal to the second preset value, analyzing according to the voltages at all the detection points to determine the fault type of the cable pit.
If the number of the first voltage difference values which are concentrated and larger than the voltage preset value is smaller than or equal to the second preset value, the fact that the voltage is larger or smaller than the voltage is detected in the first target detection points, and the number of the voltage difference values is smaller than the second preset value, the fact that detection errors and damage faults possibly exist is indicated, and further specific fault types need to be judged.
With continued reference to fig. 3, fig. 3 is a schematic flow chart illustrating a method for determining a fault type of a cable pit according to voltages at all detection points in the monitoring method shown in fig. 1, where the step of determining the fault type of the cable pit according to voltages at all detection points includes the following steps:
1341. voltages at all the detection points are acquired.
1342. And performing a difference operation on the voltages at the plurality of detection points of the first trench wall and performing a difference operation on the voltages at the plurality of detection points of the second trench wall to obtain a second voltage difference set.
And performing difference operation on the voltages at the plurality of detection points on the first trench wall according to a second preset relationship, and performing difference operation on the voltages at the plurality of detection points on the second trench wall according to the second preset relationship to obtain a second voltage difference set. The second preset relationship may be understood as performing a difference operation between a plurality of detection points disposed in the same vertical direction.
1343. And if the number of the second voltage difference values which are larger than the voltage preset value in the set is larger than a third preset value, determining that the cable trench has an inclination fault.
If the number of the second voltage difference values which are concentrated and larger than the voltage preset value is larger than the third preset value, the problem of voltage at a plurality of detection points is indicated, so that detection errors and local damage can be eliminated, and the inclination fault of the cable pit can be determined.
1344. If the number of the second voltage difference values which are larger than the voltage preset value in the set is smaller than or equal to the third preset value, the cable trench is determined to have a breakage fault.
If the number of the second voltage difference values which are concentrated and larger than the voltage preset value is smaller than or equal to the third preset value, which indicates that voltage abnormality exists in both voltage test modes, detection errors can be eliminated, the number of detection points with voltage abnormality is small, and further the cable trench is determined to have breakage faults.
140. If k 1>a1 is the same, performing difference processing on the magnetic field intensities according to a second preset relation to obtain a second magnetic field intensity difference set, and determining the fault type of the cable trench according to the second magnetic field intensity difference set through a power grid model.
Wherein k 1>a1 indicates that the number of the magnetic field intensity difference sets larger than the magnetic field intensity preset value is larger than the first preset value, that is, the magnetic field intensity has abnormal magnetic field intensity, and the number of the abnormal magnetic field intensity is larger, and also indicates that the cable trench has individual inclined faults or integral inclined faults, so that the fault type of the cable trench needs to be further determined according to the second magnetic field intensity difference set.
Wherein performing difference processing on the plurality of magnetic field intensities according to a second preset relationship to obtain a second magnetic field intensity difference set includes: acquiring a first magnetic field intensity data set of all detection points on the first trench wall; acquiring a second magnetic field intensity data set of all detection points on the second trench wall; and performing a difference operation between the first magnetic field intensity data sets on the first trench wall, and performing a difference operation between the first magnetic field intensity data sets on the first trench wall to obtain a second magnetic field intensity difference set.
In addition, determining the fault type of the cable pit from the second set of magnetic field strength differences by the grid model includes: acquiring a second magnetic field intensity difference set; if the number of the second magnetic field intensity difference values which are larger than the magnetic field intensity preset values in a concentrated mode is smaller than or equal to a fourth preset value, determining that individual inclination faults exist in the cable pit; and if the number of the second magnetic field intensity difference values which are concentrated and larger than the magnetic field intensity preset value is larger than the fourth preset value, determining that the cable trench has an integral inclination fault.
The embodiment of the application also provides a cable duct, which comprises: the first ditch wall and the second ditch wall are oppositely arranged, the first ditch wall and the second ditch wall are respectively provided with an L-layer cable support, each cable support is provided with a detection route in a surrounding mode, a plurality of detection routes are connected in parallel, each detection route comprises a plurality of detection points, and each detection point is provided with an equivalent resistor and a magnet; the processor is connected with the detection point and is used for establishing a power grid model based on a fault sample set of the cable trench operation; acquiring magnetic field intensities flowing through a plurality of detection points, and performing difference processing on the magnetic field intensities according to a first preset relationship through a power grid model to obtain a first magnetic field intensity difference set; if 0 is less than k 1≤a1, respectively acquiring a plurality of corresponding first target detection points with the difference value being greater than a preset value of the magnetic field intensity, and determining the fault type of the cable trench according to the voltages at the plurality of first target detection points through a power grid model; if k 1>a1 is the same, performing difference processing on the magnetic field intensities according to a second preset relation to obtain a second magnetic field intensity difference set, and determining the fault type of the cable trench according to the second magnetic field intensity difference set through a power grid model.
In some embodiments, the cable pit is further provided with a support frame, the support frames are vertically arranged on the cable support frame, each support frame is provided with a detection point and a magnet, the wire harness of the detection point is arranged around the magnet so that when the voltage at the detection point is increased, the magnetic field intensity of the magnet is enhanced, and the detection route further comprises an electromagnetic sensor fixedly arranged on the cable support frame so as to detect the magnetic field intensity at the detection point.
In some embodiments, whether water exists in the cable trench can also be detected through the voltage, for example, an output mode adopted by the sensor detection circuit is set to be direct-current voltage intensity output, and the high/low level which indicates whether the water level is safe or not is output after the output voltage intensity of the sensor detection circuit is compared with a preset safety water level critical voltage intensity value through the AD conversion circuit.
The embodiment of the application also provides a readable storage medium which stores computer executable instructions, and when the computer executable instructions are read and run by a processor, the surgical robot with the readable storage medium is controlled to implement the cable trench monitoring method based on the power grid model in the embodiment.
In several embodiments provided in the present application, it should be understood that the disclosed method for monitoring a cable trench based on a grid model and cable trench may be implemented in other manners. The embodiments described above are merely illustrative.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored on a computer readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method of the embodiments of the present invention. And the aforementioned readable storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (4)
1. The utility model provides a monitoring method of cable pit based on electric wire netting model, its characterized in that, the cable pit includes first ditch wall and the second ditch wall of relative setting, first ditch wall with the second ditch wall all is provided with L layer cable support, all is provided with a detection route on every cable support around, a plurality of connect in parallel between the detection route, every detection route includes a plurality of check points, every be provided with equivalent resistance and magnet on the check point, the monitoring method includes:
Establishing a power grid model based on a fault sample set of cable trench operation;
acquiring magnetic field intensities at a plurality of detection points, and performing difference processing on the magnetic field intensities according to a first preset relationship through the power grid model to obtain a first magnetic field intensity difference set;
if 0 is less than k 1≤a1, respectively acquiring a plurality of corresponding first target detection points with the difference value being greater than a preset value of the magnetic field intensity, and determining the fault type of the cable pit according to the voltages at the plurality of first target detection points through the power grid model;
If k 1>a1 is found, performing difference processing on the magnetic field intensities according to a second preset relationship to obtain a second magnetic field intensity difference set, and determining the fault type of the cable trench according to the second magnetic field intensity difference set through the power grid model;
Wherein k 1 is the number of the first magnetic field intensity difference value set greater than a magnetic field intensity preset value, and a 1 is a first preset value;
The determining, by the grid model, the fault type of the raceway from voltages at a plurality of the first target detection points includes:
acquiring voltages at a plurality of first target detection points;
Performing difference operation on first voltages at a plurality of first target detection points of the first trench wall and second voltages at a plurality of first target detection points of the second trench wall in a one-to-one correspondence manner to obtain a first voltage difference set;
If the number of the first voltage difference values which are concentrated and larger than the voltage preset value is larger than a second preset value, determining that the cable trench has a breakage fault;
If the number of the first voltage difference values which are larger than the voltage preset value in a concentrated mode is smaller than or equal to a second preset value, analyzing according to the voltages at all the detection points to determine the fault type of the cable trench;
The analyzing according to the voltages at all the detection points to determine the fault type of the cable trench comprises:
acquiring voltages at all the detection points;
Performing a difference operation on voltages at a plurality of detection points of the first trench wall, and performing a difference operation on voltages at a plurality of detection points of the second trench wall to obtain a second voltage difference set;
If the number of the second voltage difference values which are larger than the voltage preset value in a concentrated manner is larger than a third preset value, determining that the cable trench has an inclination fault;
If the number of the second voltage difference values which are larger than the voltage preset value in a concentrated manner is smaller than or equal to a third preset value, determining that the cable trench has a breakage fault;
the determining, by the grid model, the fault type of the cable trench according to the second set of magnetic field strength differences includes:
Acquiring the second magnetic field intensity difference set;
If the number of the second magnetic field intensity difference values which are more than the magnetic field intensity preset values in a concentrated manner is smaller than or equal to a fourth preset value, determining that the cable trench has individual inclination faults;
If the number of the second magnetic field intensity difference values which are concentrated and larger than the magnetic field intensity preset value is larger than a fourth preset value, determining that the cable trench has an integral inclination fault;
The performing difference processing on the magnetic field intensities according to a first preset relationship to obtain a first magnetic field intensity difference set includes:
acquiring a first magnetic field intensity data set of all detection points on the first trench wall;
acquiring a second magnetic field intensity data set of all detection points on the second trench wall;
Performing difference operation on the magnetic field intensity data in the first magnetic field intensity data set and the second magnetic field intensity data set in a one-to-one correspondence manner to obtain a first magnetic field intensity difference value set;
The performing difference processing on the magnetic field intensities according to a second preset relationship to obtain a second magnetic field intensity difference set includes:
acquiring a first magnetic field intensity data set of all detection points on the first trench wall;
acquiring a second magnetic field intensity data set of all detection points on the second trench wall;
Performing a difference operation between the first magnetic field intensity data sets on the first trench wall, and performing a difference operation between the second magnetic field intensity data sets on the second trench wall to obtain a second magnetic field intensity difference set;
The building of the power grid model based on the fault sample set of the cable trench operation comprises the following steps:
inputting the statistical data time range, the fault times, the magnetic field intensity and the voltage into the power grid model to generate historical fault density distribution data of the cable trench;
And controlling the power grid model to inquire the faults existing in the cable trench at present according to the historical fault density distribution data at intervals of a first preset time, inquiring the faults which occur in the cable trench in the history at intervals of a second preset time, inquiring the faults which occur in the cable trench and are eliminated at intervals of a third preset time, judging and positioning the faults according to the acquired information, and sending an alarm signal if the fault type is found, wherein the first preset time is smaller than the second preset time, and the second preset time is smaller than the third preset time.
2. A monitoring device for a cable pit for implementing the monitoring method according to claim 1, the cable pit comprising a first pit wall and a second pit wall disposed opposite to each other, the first pit wall and the second pit wall each being provided with an L-layer cable support, the monitoring device comprising:
each cable support is provided with a detection route in a surrounding mode, a plurality of detection routes are connected in parallel, each detection route comprises a plurality of detection points, and each detection point is provided with an equivalent resistor and a magnet;
the processor is connected with the detection point and is used for establishing a power grid model based on a fault sample set of cable trench operation;
acquiring magnetic field intensities at a plurality of detection points, and performing difference processing on the magnetic field intensities according to a first preset relationship through the power grid model to obtain a first magnetic field intensity difference set;
if 0 is less than k 1≤a1, respectively acquiring a plurality of corresponding first target detection points with the difference value being greater than a preset value of the magnetic field intensity, and determining the fault type of the cable pit according to the voltages at the plurality of first target detection points through the power grid model;
If k 1>a1 is found, performing difference processing on the magnetic field intensities according to a second preset relationship to obtain a second magnetic field intensity difference set, and determining the fault type of the cable trench according to the second magnetic field intensity difference set through the power grid model;
Wherein k 1 is the number of the first magnetic field intensity difference value set greater than a magnetic field intensity preset value, and a 1 is the first preset value.
3. The cable pit monitoring device according to claim 2, wherein the cable pit is further provided with a plurality of holders, the holders are vertically provided on the cable holders, each of the holders is provided with a detection point and a magnet, the wire harness of the detection point is arranged around the magnet so that the magnetic field strength of the magnet is enhanced when the voltage at the detection point increases, and the detection route further comprises an electromagnetic sensor fixedly provided on the cable holder so as to detect the magnetic field strength at the detection point.
4. A computer readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the monitoring method according to claim 1.
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