CN117647700A - Cable outer sheath fault identification method, device, equipment and medium - Google Patents
Cable outer sheath fault identification method, device, equipment and medium Download PDFInfo
- Publication number
- CN117647700A CN117647700A CN202311621335.0A CN202311621335A CN117647700A CN 117647700 A CN117647700 A CN 117647700A CN 202311621335 A CN202311621335 A CN 202311621335A CN 117647700 A CN117647700 A CN 117647700A
- Authority
- CN
- China
- Prior art keywords
- grounding
- voltage
- circuit control
- cable
- short circuit
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000002184 metal Substances 0.000 claims abstract description 76
- 239000000725 suspension Substances 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims description 40
- 230000000737 periodic effect Effects 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 16
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims 2
- 239000010410 layer Substances 0.000 description 71
- 238000004891 communication Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
-
- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
-
- 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
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The embodiment of the application discloses a method, a device, equipment and a medium for identifying faults of an outer sheath of a cable. Wherein the method comprises the following steps: after the cable is in an operation state and the grounding yoke plate of the metal shielding layer of the cable is switched to a suspension state, a short circuit control signal is sent to the short circuit control device, and the short circuit control device is controlled to be in a first state or a second state through the short circuit control signal; the grounding connecting plate is connected with the grounding end in the first state, and is disconnected with the grounding end in the second state; one end of the short circuit control device is connected with the grounding connecting plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end; when the grounding connecting plate is disconnected from the grounding end, voltage values at all positions of the cable outer sheath are obtained; and if the voltage value at the target position meets the voltage fault condition, determining the target position as the outer sheath fault position. According to the technical scheme, the position of the cable outer sheath fault can be accurately identified under the condition that the cable normally operates.
Description
Technical Field
The invention relates to the technical field of cable fault identification, in particular to a method, a device, equipment and a medium for identifying cable outer sheath faults.
Background
At present, the faults of the outer sheath of the high-voltage single-core cable refer to the failure of the metal sheath voltage resistance and insulation test of the power cable, and the reasons for the failure are as follows: cable jacket breakage, insulation aging, and the like.
The existing cable outer sheath fault positioning method needs to perform power failure operation on the operation cable and then perform outer sheath fault positioning. However, when the power is cut off from the operation cable, the problem that power cannot be supplied in a short time exists in the corresponding region, the time required for the power cut off operation is long, the power supply reliability is required, the power cut off time is limited, and in many cases, the outer sheath faults of the cable cannot be identified in a limited time.
Disclosure of Invention
The invention provides a method, a device, equipment and a medium for identifying faults of a cable outer sheath, which can accurately identify the positions of the faults of the cable outer sheath under the condition of normal operation of the cable and can avoid the problem that the power cannot be supplied in a short time in a corresponding region when the cable is identified after the power is off.
According to an aspect of the present invention, there is provided a method for identifying a cable outer sheath fault, the method comprising:
after the cable is in an operation state and the grounding connection plate of the metal shielding layer of the cable is switched to a suspension state, a short circuit control signal is sent to a short circuit control device, and the short circuit control device is controlled to be in a first state or a second state by the short circuit control signal; the grounding connecting plate is connected with the grounding end in a first state, and the grounding connecting plate is disconnected with the grounding end in a second state; one end of the short circuit control device is connected with the grounding yoke plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end;
When the grounding connecting plate is disconnected from the grounding end, voltage values at all positions of the cable outer sheath are obtained;
and if the voltage value at the target position meets the voltage fault condition, determining the target position as the outer sheath fault position.
According to another aspect of the present invention, there is provided an apparatus for identifying a cable outer sheath failure, comprising:
the short circuit control signal sending module is used for sending a short circuit control signal to the short circuit control device after the cable is in an operation state and the grounding connection plate of the metal shielding layer of the cable is switched to a suspension state, and controlling the short circuit control device to be in a first state or a second state through the short circuit control signal; the grounding connecting plate is connected with the grounding end in a first state, and the grounding connecting plate is disconnected with the grounding end in a second state; one end of the short circuit control device is connected with the grounding yoke plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end;
the voltage value acquisition module is used for acquiring voltage values at all positions of the cable outer sheath when the grounding yoke plate is disconnected with the grounding end;
the fault position determining module is used for determining the target position as the outer sheath fault position if the voltage value at the target position meets the voltage fault condition.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of identifying a cable jacket fault according to any of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to implement the method for identifying a cable jacket fault according to any of the embodiments of the present invention when executed.
The technical scheme of the embodiment of the application comprises the following steps: after the cable is in an operation state and the grounding connection plate of the metal shielding layer of the cable is switched to a suspension state, a short circuit control signal is sent to a short circuit control device, and the short circuit control device is controlled to be in a first state or a second state by the short circuit control signal; the grounding connecting plate is connected with the grounding end in a first state, and the grounding connecting plate is disconnected with the grounding end in a second state; one end of the short circuit control device is connected with the grounding yoke plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end; when the grounding connecting plate is disconnected from the grounding end, voltage values at all positions of the cable outer sheath are obtained; and if the voltage value at the target position meets the voltage fault condition, determining the target position as the outer sheath fault position. According to the technical scheme, the short circuit control device is controlled by the short circuit control signal, connection or disconnection of the grounding yoke plate and the grounding end is achieved, when the grounding yoke plate is disconnected from the grounding end, voltage values of all positions of the cable outer sheath are obtained, and then the fault position of the outer sheath is determined according to the voltage values of all positions, so that the fault position of the cable outer sheath can be accurately identified under the condition that the cable normally operates, and the problem that power cannot be supplied in a short time in a corresponding region when the cable is identified after the cable is powered off is avoided.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present 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 flowchart of a method for identifying a cable sheath fault according to a first embodiment of the present application;
fig. 2 is a flowchart of a method for identifying a cable sheath fault according to a second embodiment of the present application;
fig. 3 is a schematic structural diagram of a device for identifying a cable sheath failure according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device implementing a method for identifying a cable jacket failure according to an embodiment of the present application.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the following description will be made in detail, with reference to the accompanying drawings, in which embodiments of the present invention are shown, and it is apparent that the described embodiments are only some, but not all, embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," "target," and the like in the description and claims of the present invention and in the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a flowchart of a method for identifying a cable sheath fault according to an embodiment of the present application, where the method may be applicable to identifying a fault location of an outer sheath of a high-voltage single-core cable, and the method may be performed by an apparatus for identifying a cable sheath fault, where the apparatus for identifying a cable sheath fault may be implemented in a form of hardware and/or software, and the apparatus for identifying a cable sheath fault may be configured in an electronic device having data processing capability. As shown in fig. 1, the method includes:
s110, after the cable is in an operation state and the grounding yoke plate of the metal shielding layer of the cable is switched to a suspension state, sending a short circuit control signal to a short circuit control device, and controlling the short circuit control device to be in a first state or a second state through the short circuit control signal; the grounding connecting plate is connected with the grounding end in a first state, and the grounding connecting plate is disconnected with the grounding end in a second state; one end of the short circuit control device is connected with the grounding connecting plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end.
The cable may be a cable with a metal shielding layer, and the cable structure is from inside to outside, which is approximately: conductors, main insulation layers, metallic shielding layers, outer jacket layers, etc., and the cable is illustratively a high voltage single core cable. When the cable normally transports electric energy, the cable is in a normal operation state, and the cable can also be called as a normal operation state. The ground yoke plate of the metal shield means a member for grounding the metal shield. One end of the short circuit control device is connected with the grounding yoke plate of the metal shielding layer of the cable, the other end of the short circuit control device is connected with the grounding end, the short circuit control device can realize that the grounding yoke plate is connected with or disconnected from the grounding end, and the short circuit control device can be a relay, a high-power short circuit mechanism and the like. The short-circuit control signal is a signal for controlling the short-circuit control device.
Specifically, the cable is located under the operation state, and means that the cable normally transports electric energy, and the metal shielding layer of cable is grounded through the grounding yoke plate under this kind of circumstances generally, but the technical scheme of this application is after the cable still normally transports electric energy, and the grounding yoke plate of the metal shielding layer of cable switches to the unsettled state (not grounded), carries out the discernment of oversheath fault position through subsequent step.
Further, after the cable is in the operation state and the grounding connection plate of the metal shielding layer of the cable is switched to the suspension state, a short circuit control signal is sent to the short circuit control device, and the short circuit control device is controlled according to the short circuit control signal, so that the short circuit control device is continuously switched between a first state and a second state, wherein the first state can be understood as a closed state, namely, in the closed state, the short circuit control device enables the grounding connection plate to be connected with the grounding end, namely, the grounding connection plate is grounded; the second state may be understood as an open state, i.e. in which the short-circuit control means disconnect the ground connection plate from the ground, i.e. the ground connection plate is not grounded.
In this embodiment of the application, after the ground connection yoke plate of the metal shielding layer of cable switches to the unsettled state, the metal shielding layer receives the influence of stepping up, its voltage can constantly rise, if place no matter there is the electricity danger, but this application is through short circuit control signal control short circuit control device for the ground connection yoke plate of metal shielding layer can constantly switch between ground connection and ungrounded, when grounded, the metal shielding layer is through the ground connection yoke plate pressure release, its voltage decline, when ungrounded, the metal shielding layer receives the influence of stepping up, its voltage rise, can just make its ground connection when its voltage does not rise to dangerous voltage threshold value, thereby solve the potential safety hazard that the metal shielding layer voltage is too high and bring.
S120, when the grounding yoke plate is disconnected from the grounding end, voltage values at all positions of the cable outer sheath are obtained.
In this embodiment of the application, when ground connection yoke plate and ground connection end disconnection, the voltage on metal shielding layer can rise, and when metal shielding layer had certain voltage, at the broken position department of the oversheath of metal shielding layer outside, higher voltage can be detected, and in the normal position department of oversheath promptly, the voltage of detection can be less than the voltage of oversheath fault position department.
Further, when the grounding yoke plate is disconnected from the grounding end, voltage detection is carried out on each position of the cable outer sheath through the voltage detection device, and voltage values of each position of the cable outer sheath are obtained. In one implementation scheme, when the grounding connection plate is disconnected from the grounding end, a prompt signal capable of carrying out voltage detection is sent out, so that a worker can detect all positions of the cable outer sheath by using the voltmeter, and voltage values of all positions are obtained. In another implementation scheme, when the grounding connecting plate is disconnected from the grounding end, a voltage detection signal and a movement signal are sent to the voltage detection robot, so that the voltage detection robot moves a distance along the cable after performing voltage detection, and the voltage values at all positions of the cable outer sheath can be obtained repeatedly.
And S130, if the voltage value at the target position meets the voltage fault condition, determining the target position as the outer sheath fault position.
The voltage fault condition may be determined according to an actual situation, which is not limited in this embodiment of the present application, and exemplary voltage fault conditions may reflect a voltage threshold, that is, a voltage fault exceeding the threshold.
Specifically, after the voltage values at each position of the cable outer sheath are obtained, it can be judged which position satisfies the voltage fault condition, and the position is determined as the target position, namely, the target position is determined as the outer sheath fault position.
The technical scheme of the embodiment of the application comprises the following steps: after the cable is in an operation state and the grounding connection plate of the metal shielding layer of the cable is switched to a suspension state, a short circuit control signal is sent to a short circuit control device, and the short circuit control device is controlled to be in a first state or a second state by the short circuit control signal; the grounding connecting plate is connected with the grounding end in a first state, and the grounding connecting plate is disconnected with the grounding end in a second state; one end of the short circuit control device is connected with the grounding yoke plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end; when the grounding connecting plate is disconnected from the grounding end, voltage values at all positions of the cable outer sheath are obtained; and if the voltage value at the target position meets the voltage fault condition, determining the target position as the outer sheath fault position. According to the technical scheme, the short circuit control device is controlled by the short circuit control signal, connection or disconnection of the grounding yoke plate and the grounding end is achieved, when the grounding yoke plate is disconnected from the grounding end, voltage values of all positions of the cable outer sheath are obtained, and then the fault position of the outer sheath is determined according to the voltage values of all positions, so that the fault position of the cable outer sheath can be accurately identified under the condition that the cable normally operates, and the problem that power cannot be supplied in a short time in a corresponding region when the cable is identified after the cable is powered off is avoided.
Example two
Fig. 2 is a flowchart of a method for identifying a cable sheath fault according to a second embodiment of the present application, where the embodiment of the present application is optimized based on the foregoing embodiment.
As shown in fig. 2, the method in the embodiment of the application specifically includes the following steps:
s210, when the cable is in an operation state and the voltage limiting mode is started for the metal shielding layer, the grounding connecting plate of the metal shielding layer of the cable is switched from a grounding state to a suspending state.
The voltage limiting mode refers to limiting the voltage of the metal shielding layer, and in the voltage limiting mode, the voltage of the metal shielding layer does not exceed a voltage threshold.
Specifically, after the grounding connection plate of the metal shielding layer is switched from the grounding state to the suspending state, the voltage of the metal shielding layer is affected by the boosting, and the voltage of the metal shielding layer can rapidly rise, so that the grounding connection plate of the metal shielding layer of the cable is required to be switched from the grounding state to the suspending state in a voltage limiting mode, and the voltage is prevented from exceeding a voltage threshold value after the grounding connection plate is switched to the suspending state.
In this embodiment, optionally, the working process of the voltage limiting mode includes: acquiring the voltage to the ground of the grounding yoke plate through voltage detection equipment when the cable is in an operation state; and if the voltage to the ground is larger than a voltage threshold value, sending a short circuit signal to a short circuit control device so as to enable the grounding link plate to be short-circuited to the ground.
The voltage threshold may be determined according to practical situations, which is not limited in the embodiment of the present application.
Specifically, one end of the voltage detection device is connected with the grounding yoke plate in advance, and the other end of the voltage detection device is connected with the grounding end, so that the voltage detection device can detect the voltage to the ground of the grounding yoke plate.
Further, the voltage detection equipment is used for obtaining the grounding voltage of the grounding connecting plate, judging whether the grounding voltage is larger than a voltage threshold value, and if so, sending a short-circuit signal to a short-circuit control device so as to enable the grounding connecting plate to be short-circuited to the ground; otherwise, the voltage detection equipment is used for obtaining the voltage to the ground of the grounding yoke plate.
S220, after the cable is in an operation state and the grounding yoke plate of the metal shielding layer of the cable is switched to a suspension state, determining a periodic short circuit control signal according to the grounding time and the suspension time in each period.
The grounding time refers to the time for connecting the grounding connection plate with the grounding end in one period, and the grounding time can be determined according to practical conditions. The suspension time refers to the time when the grounding connection plate is disconnected from the grounding end in one period, and the suspension time can be determined according to practical conditions, which is not limited in the embodiment of the application. The periodic short circuit control signal means that the short circuit control signal is periodic, and in one period, the short circuit control signal is composed of a grounding time and a suspension time.
Specifically, the grounding time and the suspension time can be predetermined by a worker according to actual conditions, then the grounding time and the suspension time are stored in the hard disk, and after the grounding time and the suspension time are read from the hard disk, a periodic short circuit control signal is generated.
In this embodiment of the present application, optionally, a process for determining a grounding time and a suspension time includes: determining the suspension time according to the rising time required by the voltage of the metal shielding layer to rise from the grounding voltage to the detection voltage threshold; and determining the grounding time according to the falling time required by the voltage of the metal shielding layer to fall from the detection voltage threshold to the grounding voltage.
The ground voltage is usually 0, i.e. the voltage at the ground terminal. The detection voltage threshold may be determined according to an actual situation, which is not limited in the embodiment of the present application, and the detection voltage threshold may be a maximum detection voltage of the voltmeter.
Specifically, the rising time required by rising the voltage of the metal shielding layer from the ground voltage to the detection voltage threshold is determined as the suspension time, so that the voltage of the metal shielding layer cannot exceed the detection voltage threshold in the suspension time, and the safety of subsequent voltage detection is improved. The time required for the voltage of the metal shielding layer to drop from the detection voltage threshold to the grounding voltage is determined as the grounding time, so that the grounding connection plate can be suspended immediately after the voltage of the metal shielding layer drops to the grounding voltage, the grounding time of the grounding connection plate is shortened as much as possible, and the suspension time is made as large as possible in one period (the subsequent voltage detection can be performed in the suspension time).
In this embodiment, optionally, determining the suspension time according to a rise time required for a voltage of the metal shielding layer to rise from a ground voltage to a detection voltage threshold includes: determining the product of the rise time and the reduction coefficient as the suspension time; the reduction coefficient is less than 1.
The reduction coefficient may be determined according to practical situations, which is not limited in the embodiment of the present application.
The scheme is set in such a way that the suspension time is smaller than the rising time, and the voltage of the metal shielding layer can be further ensured not to exceed the detection voltage threshold value in the suspension time.
Determining the grounding time according to the falling time required by the voltage of the metal shielding layer to fall from the detection voltage threshold to the grounding voltage, comprising: determining the product of the falling time and an amplification factor as the grounding time; the amplification factor is greater than 1.
The amplification factor may be determined according to an actual situation, which is not limited in the embodiment of the present application.
The scheme is set in such a way that the grounding time is longer than the falling time, so that the voltage of the metal shielding layer can be further ensured to be reduced to the grounding voltage in the grounding time.
And S230, a periodic short-circuit control signal is sent to the short-circuit control device, so that the short-circuit control device is controlled to be in a first state through the grounding time of the periodic short-circuit control signal in each period, and the short-circuit control device is controlled to be in a second state through the suspension time of the periodic short-circuit control signal in each period.
The grounding connecting plate is connected with the grounding end in a first state, and is disconnected with the grounding end in a second state; one end of the short circuit control device is connected with the grounding connecting plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end.
S240, when the grounding yoke plate is disconnected from the grounding end, voltage values at all positions of the cable outer sheath are obtained.
S250, if the voltage value at the target position meets the voltage fault condition, determining the target position as the outer sheath fault position.
In this embodiment, optionally, if the voltage value at the target position meets the voltage fault condition, determining that the target position is the outer sheath fault position includes: if the voltage value at the target position is greater than the voltage fault threshold, determining the target position as an outer sheath fault position; or if the voltage value at the target position is larger than the voltage values at other positions, determining the target position as the outer sheath fault position.
The voltage fault threshold may be determined according to an actual situation, which is not limited in the embodiment of the present application.
Specifically, at the fault location, the insulation performance and the like of the outer sheath are affected, which can cause the metal shielding layer to discharge through the fault location, so that the voltage at the fault location is higher, and when the voltage at the target location is detected to be greater than the voltage fault threshold, the target location can be determined as the fault location of the outer sheath; or after the voltages at all the positions are obtained, determining the position with the highest voltage as the fault position of the outer sheath.
The technical scheme of the embodiment of the application comprises the following steps: when the cable is in an operation state and a voltage limiting mode is started for the metal shielding layer, the grounding connecting plate of the metal shielding layer of the cable is switched from a grounding state to a suspending state; after the cable is in an operation state and the grounding yoke plate of the metal shielding layer of the cable is switched to a suspension state, determining a periodic short circuit control signal according to the grounding time and suspension time in each period; sending a periodic short-circuit control signal to a short-circuit control device, so that the short-circuit control device is controlled to be in a first state by the grounding time of the periodic short-circuit control signal in each period, and is controlled to be in a second state by the suspension time in each period; when the grounding connecting plate is disconnected from the grounding end, voltage values at all positions of the cable outer sheath are obtained; and if the voltage value at the target position meets the voltage fault condition, determining the target position as the outer sheath fault position. According to the technical scheme, through the voltage limiting mode, the grounding yoke plate of the metal shielding layer of the cable is switched from the grounding state to the suspending state, so that the voltage of the metal shielding layer cannot exceed a voltage threshold value, the grounding yoke plate is switched from the grounding state to the suspending state in the process, and after the grounding yoke plate is switched, the problem of safety accidents caused by overhigh voltage cannot occur.
Regarding the technical scheme of the embodiment of the application, the method and the device can be applied to the accurate positioning of the faults of the outer sheath of the high-voltage cable.
Regarding the fault locating and positioning of the main insulation fault and the outer sheath fault of the high-voltage cable, the method generally comprises two steps: the first step, the preset position, that is to say, the cable of several kilometers or tens of kilometers fails, is first preset, and knows how far away from the fault point is about to swing the fault finding device, and here, the error can be about several tens of meters, and is a general value. And secondly, accurately positioning, and detecting relevant electric pulse signals or sounds by taking an accurate positioning instrument to the approximate position pointed by the preset position by on-site staff according to preset positioning data. Generally, accurate positioning can achieve an accuracy within half a meter. The technical scheme of the embodiment of the application can be applied to the second-step accurate positioning.
At present, all accurate positioning schemes need to change the high-voltage single-core cable from an operation state to an overhaul state, and simply speaking, the high-voltage single-core cable is stopped. The method has the greatest characteristic that the high-voltage single-core cable performs fault location in the running state.
For the high-voltage single-core cable, the high-voltage single-core cable belongs to a main line, the annual time for changing to an overhaul state is very limited, the time required for fault locating and searching is quite long, and the power failure time is difficult to meet under the general conditions (the general field flow comprises insulation value testing, pre-locating, accurate locating, pavement excavation, fault point repairing and the like). The failure of the outer sheath layer of the high-voltage single-core cable does not belong to emergency defects or major defects in most cases, and the cable with the failure of the outer sheath layer can be simply understood to be in a sub-health state.
For the above reasons, many times the cable outer sheath failure is handled in combination with the outage service window, and the cable outer sheath failure can only be handled temporarily without the outage service window.
The scheme is provided, so that the pain point which is only temporarily not treated without a power failure access window can be perfectly solved.
At present, the prior art scheme is to provide a high-voltage pulse signal transmitting circuit, namely Jian Shandian, the equipment can generate an electric signal with very high voltage and very high energy for being applied to a fault cable for positioning and using (for boosting the metal shielding layer). Such booster devices, because of the high voltage and high energy involved, require relatively expensive materials and larger power supplies for field use.
According to the technical scheme, boosting equipment is not needed, under the operation state of a high-voltage single-core cable, the outer sheath fault is needed to find the cable, two ends of a directly grounded connecting plate of a metal shielding layer are connected with voltage detection controllers in parallel, the voltage detection controllers detect voltages at two ends of the connecting plate in real time, voltage threshold values are arranged on the voltage detection controllers, when the voltages at two ends of the connecting plate are detected to be higher than the voltage threshold values, the two ends of the connecting plate are subjected to short circuit and pressure relief through an internal high-power short circuit mechanism, and the voltage of the metal shielding layer is always kept in a specified range. ( Here, it is necessary to resolve: when the high-voltage single-core cable is in operation, the metal shielding layer must be at least connected with the grounding grid at a point, the connection point is the direct grounding connection plate, once the connection point is disconnected, a high voltage is formed on the whole metal shielding layer until the outer sheath layer is broken by high-voltage breakdown, the high-voltage single-core cable is discharged to the ground and continuously circulated, and finally, the cable is burned due to continuous discharge to the ground at the position of the outer sheath layer broken by the high-voltage breakdown, so that one important function of the voltage detection controller is to ensure the safety of the cable in fault finding. )
After the connecting plate is disconnected after the voltage detection controller is connected, the cable main insulation and the outer protective layer can form a high voltage on the metal shielding layer due to the voltage division effect, and the high voltage can leak from the lowest insulation position of the cable outer protective layer of the section, namely, the fault point position. According to the technical scheme, the voltage division effect of the high-voltage single-core cable is skillfully borrowed, the boosting equipment is saved, equipment cost is saved, and equipment structural complexity is reduced.
Example III
Fig. 3 is a schematic structural diagram of a device for identifying a cable sheath fault provided in a third embodiment of the present application, where the device may execute the method for identifying a cable sheath fault provided in any embodiment of the present invention, and the device has a functional module and beneficial effects corresponding to the execution method. As shown in fig. 3, the apparatus includes:
the short circuit control signal sending module 310 is configured to send a short circuit control signal to the short circuit control device after the cable is in an operation state and the grounding yoke plate of the metal shielding layer of the cable is switched to a suspended state, and control the short circuit control device to be in a first state or a second state through the short circuit control signal; the grounding connecting plate is connected with the grounding end in a first state, and the grounding connecting plate is disconnected with the grounding end in a second state; one end of the short circuit control device is connected with the grounding yoke plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end;
The voltage value obtaining module 320 is configured to obtain voltage values at positions of the cable jacket when the grounding yoke plate is disconnected from the grounding end;
the fault location determining module 330 is configured to determine the target location as the outer sheath fault location if the voltage value at the target location satisfies the voltage fault condition.
The technical scheme of the embodiment of the application comprises the following steps: the short circuit control signal sending module 310 is configured to send a short circuit control signal to the short circuit control device after the cable is in an operation state and the grounding yoke plate of the metal shielding layer of the cable is switched to a suspended state, and control the short circuit control device to be in a first state or a second state through the short circuit control signal; the grounding connecting plate is connected with the grounding end in a first state, and the grounding connecting plate is disconnected with the grounding end in a second state; one end of the short circuit control device is connected with the grounding yoke plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end; the voltage value obtaining module 320 is configured to obtain voltage values at positions of the cable jacket when the grounding yoke plate is disconnected from the grounding end; the fault location determining module 330 is configured to determine the target location as the outer sheath fault location if the voltage value at the target location satisfies the voltage fault condition. According to the technical scheme, the short circuit control device is controlled by the short circuit control signal, connection or disconnection of the grounding yoke plate and the grounding end is achieved, when the grounding yoke plate is disconnected from the grounding end, voltage values of all positions of the cable outer sheath are obtained, and then the fault position of the outer sheath is determined according to the voltage values of all positions, so that the fault position of the cable outer sheath can be accurately identified under the condition that the cable normally operates, and the problem that power cannot be supplied in a short time in a corresponding region when the cable is identified after the cable is powered off is avoided.
Optionally, the device further includes a state switching module, configured to switch the grounding link plate of the metal shielding layer of the cable from the grounding state to the floating state when the cable is in the operating state and the voltage limiting mode is turned on for the metal shielding layer.
Optionally, the device further includes a voltage limiting module, where the voltage limiting module is configured to implement a function of a voltage limiting mode, and specifically includes:
the ground voltage acquisition unit is used for acquiring the ground voltage of the grounding yoke plate through the voltage detection equipment when the cable is in an operation state;
and the grounding short-circuit unit is used for sending a short-circuit signal to a short-circuit control device to enable the grounding yoke plate to be in short circuit with the ground if the grounding voltage is larger than a voltage threshold value.
Optionally, the short circuit control signal transmitting module 310 includes:
the periodic short circuit control signal determining unit is used for determining a periodic short circuit control signal according to the grounding time and the suspension time in each period;
and the signal sending unit is used for sending a periodic short circuit control signal to the short circuit control device so as to control the short circuit control device to be in a first state through the grounding time of the periodic short circuit control signal in each period and control the short circuit control device to be in a second state through the suspension time in each period.
Optionally, the apparatus further includes:
the suspension time determining module is used for determining the suspension time according to the rising time required by the voltage of the metal shielding layer to rise from the grounding voltage to the detection voltage threshold value;
the grounding time determining module is used for determining the grounding time according to the falling time required by the voltage of the metal shielding layer to fall from the detection voltage threshold to the grounding voltage.
Optionally, the suspension time determining module includes:
a suspension time determining unit configured to determine a product of the rising time and the reduction coefficient as the suspension time; the reduction coefficient is smaller than 1;
a ground time determination module comprising:
a ground time determining unit configured to determine a product of the falling time and an amplification factor as the ground time; the amplification factor is greater than 1.
Optionally, the fault location determination module 330 includes:
the fault position determining unit is used for determining the target position as the outer sheath fault position if the voltage value at the target position is greater than the voltage fault threshold value; or,
and if the voltage value at the target position is larger than the voltage values at other positions, determining that the target position is the outer sheath fault position.
The device for identifying the cable sheath faults, which is provided by the embodiment of the invention, can execute the method for identifying the cable sheath faults, which is provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example IV
Fig. 4 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 4, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as the method of identifying a cable jacket failure.
In some embodiments, the method of identifying a cable jacket failure may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the above-described method of identifying a cable jacket failure may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the method of identifying cable sheath faults in any other suitable manner (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), complex Programmable Logic Devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for identifying a cable jacket failure, the method comprising:
after the cable is in an operation state and the grounding connection plate of the metal shielding layer of the cable is switched to a suspension state, a short circuit control signal is sent to a short circuit control device, and the short circuit control device is controlled to be in a first state or a second state by the short circuit control signal; the grounding connecting plate is connected with the grounding end in a first state, and the grounding connecting plate is disconnected with the grounding end in a second state; one end of the short circuit control device is connected with the grounding yoke plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end;
When the grounding connecting plate is disconnected from the grounding end, voltage values at all positions of the cable outer sheath are obtained;
and if the voltage value at the target position meets the voltage fault condition, determining the target position as the outer sheath fault position.
2. The method of claim 1, wherein the ground strap of the metallic shield of the cable is switched from a grounded state to a suspended state when the cable is in an operational state and the voltage limiting mode is activated for the metallic shield.
3. The method of claim 2, wherein the voltage limiting mode of operation comprises:
acquiring the voltage to the ground of the grounding yoke plate through voltage detection equipment when the cable is in an operation state;
and if the voltage to the ground is larger than a voltage threshold value, sending a short circuit signal to a short circuit control device so as to enable the grounding link plate to be short-circuited to the ground.
4. The method of claim 1, wherein sending a short circuit control signal to a short circuit control device comprises:
determining a periodic short circuit control signal according to the grounding time and the suspension time in each period;
and sending a periodic short-circuit control signal to the short-circuit control device so as to control the short-circuit control device to be in a first state through the grounding time of the periodic short-circuit control signal in each period and control the short-circuit control device to be in a second state through the suspension time of the periodic short-circuit control signal in each period.
5. The method of claim 4, wherein the determining of the grounding time and the hang time comprises:
determining the suspension time according to the rising time required by the voltage of the metal shielding layer to rise from the grounding voltage to the detection voltage threshold;
and determining the grounding time according to the falling time required by the voltage of the metal shielding layer to fall from the detection voltage threshold to the grounding voltage.
6. The method of claim 5, wherein determining the hangtime based on a rise time required for a voltage of the metallic shielding layer to rise from a ground voltage to a detection voltage threshold comprises:
determining the product of the rise time and the reduction coefficient as the suspension time; the reduction coefficient is smaller than 1;
determining the grounding time according to the falling time required by the voltage of the metal shielding layer to fall from the detection voltage threshold to the grounding voltage, comprising:
determining the product of the falling time and an amplification factor as the grounding time; the amplification factor is greater than 1.
7. The method of claim 1, wherein determining the target location as the outer jacket fault location if the voltage value at the target location satisfies the voltage fault condition comprises:
If the voltage value at the target position is greater than the voltage fault threshold, determining the target position as an outer sheath fault position; or,
and if the voltage value at the target position is larger than the voltage values at other positions, determining that the target position is the outer sheath fault position.
8. An apparatus for identifying a cable jacket failure, the apparatus comprising:
the short circuit control signal sending module is used for sending a short circuit control signal to the short circuit control device after the cable is in an operation state and the grounding connection plate of the metal shielding layer of the cable is switched to a suspension state, and controlling the short circuit control device to be in a first state or a second state through the short circuit control signal; the grounding connecting plate is connected with the grounding end in a first state, and the grounding connecting plate is disconnected with the grounding end in a second state; one end of the short circuit control device is connected with the grounding yoke plate of the metal shielding layer of the cable, and the other end of the short circuit control device is connected with the grounding end;
the voltage value acquisition module is used for acquiring voltage values at all positions of the cable outer sheath when the grounding yoke plate is disconnected with the grounding end;
the fault position determining module is used for determining the target position as the outer sheath fault position if the voltage value at the target position meets the voltage fault condition.
9. An electronic device, the electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of determining the coordinates of a measurement point of any one of claims 1 to 7.
10. A computer readable storage medium, characterized in that it stores computer instructions for causing a processor to implement the method of determining coordinates of a measurement point according to any one of claims 1 to 7 when executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311621335.0A CN117647700A (en) | 2023-11-29 | 2023-11-29 | Cable outer sheath fault identification method, device, equipment and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311621335.0A CN117647700A (en) | 2023-11-29 | 2023-11-29 | Cable outer sheath fault identification method, device, equipment and medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117647700A true CN117647700A (en) | 2024-03-05 |
Family
ID=90044556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311621335.0A Pending CN117647700A (en) | 2023-11-29 | 2023-11-29 | Cable outer sheath fault identification method, device, equipment and medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117647700A (en) |
-
2023
- 2023-11-29 CN CN202311621335.0A patent/CN117647700A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113884943B (en) | Leakage fault analysis method, device, equipment and medium | |
| CN117465500A (en) | Method, device, equipment and storage medium for judging connection correctness of switch machine | |
| CN117647700A (en) | Cable outer sheath fault identification method, device, equipment and medium | |
| CN116465367A (en) | Equipment checking method, device, equipment and medium | |
| CN116794436A (en) | Lightning arrester degradation alarm method, device, electronic equipment, system and medium | |
| CN115308642A (en) | Cable outlet end detection system, method and device, electronic equipment and medium | |
| CN116124903A (en) | Defect early warning method, device, system, equipment and medium for insulator | |
| CN114778950A (en) | Pole tower grounding resistance state determination method, device, equipment and storage medium | |
| CN107846698B (en) | Standing-wave ratio measuring method and device | |
| CN116298840A (en) | Primary switch equipment action diagnosis method, device, equipment and storage medium | |
| CN115407150A (en) | System, method, meter and medium for determining use condition of protective pressing plate | |
| CN115241546A (en) | Method and device for determining fault of battery system, electronic equipment and storage medium | |
| CN111896840B (en) | Method and system for judging fault interval in hybrid line based on fault traveling wave voltage | |
| CN117579147A (en) | Fault positioning method and device, electronic equipment and storage medium | |
| CN118671648A (en) | Method and device for detecting electric leakage of transformer area, electronic equipment and storage medium | |
| CN115728596A (en) | Positioning method, device, equipment and medium for detecting overhead ground wire abnormity | |
| CN118833178A (en) | Vehicle chassis fault early warning method, device, equipment, medium and program product | |
| CN115015821A (en) | Verification method, device and equipment applied to online monitoring device | |
| CN118353762A (en) | Intelligent switch terminal positioning alarm method, device, equipment and medium | |
| CN116125207A (en) | Power failure detection method and device for low-voltage distribution transformer area, electronic equipment and medium | |
| CN115077820A (en) | Liquid leakage detection system | |
| CN117422242A (en) | Cable inspection plan generation method, device, equipment and storage medium | |
| CN115617586A (en) | Fault detection device, method, system and storage medium | |
| CN116826676A (en) | Method, device and medium for determining tripping fault type of power transmission line | |
| CN118518981A (en) | Fault positioning method and system for overhead line, electronic equipment and storage medium |
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 |