CN114137441B - Method, device, equipment and storage medium for detecting power line - Google Patents
Method, device, equipment and storage medium for detecting power line Download PDFInfo
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- CN114137441B CN114137441B CN202111439721.9A CN202111439721A CN114137441B CN 114137441 B CN114137441 B CN 114137441B CN 202111439721 A CN202111439721 A CN 202111439721A CN 114137441 B CN114137441 B CN 114137441B
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
Abstract
The application discloses a method, a device, equipment and a storage medium for detecting a power line, wherein the method is applied to a fault inspection terminal, the fault inspection terminal is connected with detection clamp equipment, and the method comprises the following steps: acquiring a first line parameter of a first detection line and a second line parameter of a second detection line, and determining a line parameter threshold value based on the first line parameter and/or the second line parameter, wherein the first detection line and the second detection line are lines positioned at two sides of a hanging point when the detection clamp equipment is hung on a suspected fault power line; receiving a first current value corresponding to the first detection circuit and a second current value corresponding to the second detection circuit, which are sent by the detection clamp equipment; and judging whether the first detection circuit and the second detection circuit have faults or not according to the circuit parameter threshold value, the first current value and the second current value, so that the fault detection precision and the fault detection efficiency are improved.
Description
Technical Field
The present disclosure relates to the field of power grid data processing technologies, and in particular, to a method for detecting a power line, a device for detecting a power line, an electronic device, and a computer readable storage medium.
Background
When a line fails, the traditional method for searching the fault is as follows: and (3) disconnecting a sectionalized switch or a branch switch of the line, sectionally detecting by using a megger, and judging the fault range. If a certain section of line is longer and has no switch (knife switch), and can not be segmented, the pole-climbing operation is needed, the jumper wire of the durable pole (tower) is untied for segmented detection, and after the detection is finished, the jumper wire is connected. Often, a plurality of points are needed to step on a rod, and a fault range can be judged by 'separating and connecting the jumper' and detecting the jumper in sections for a plurality of times. Traditional methods are time consuming and laborious, inefficient, and increase operational risks.
Disclosure of Invention
The application provides a method, a device, equipment and a storage medium for detecting a power line, which are used for solving the problems that when line fault detection is carried out in the prior art, a plurality of points are needed to step on a rod, so that time and labor are wasted, the efficiency is low, the operation risk is increased and the like.
In a first aspect, an embodiment of the present application provides a method for detecting a power line, where the method is applied to a fault inspection terminal, and the fault inspection terminal establishes a connection with a detection clamp device, and the method includes:
Acquiring a first line parameter of a first detection line and a second line parameter of a second detection line, and determining a line parameter threshold based on the first line parameter and/or the second line parameter, wherein the first detection line and the second detection line are lines positioned at two sides of a hanging point when the detection clamp equipment is hung on a suspected fault power line;
receiving a first current value corresponding to the first detection circuit and a second current value corresponding to the second detection circuit, which are sent by the detection clamp equipment;
and respectively judging whether the first detection circuit and the second detection circuit have faults or not according to the circuit parameter threshold value, the first current value and the second current value.
In a second aspect, an embodiment of the present application further provides an apparatus for detecting a power line, where the apparatus is applied to a fault inspection terminal, and the fault inspection terminal establishes a connection with a detection pliers device, and the apparatus includes:
the circuit parameter acquisition module is used for acquiring a first circuit parameter of a first detection circuit and a second circuit parameter of a second detection circuit, wherein the first detection circuit and the second detection circuit are circuits positioned at two sides of a hanging point when the detection clamp equipment is hung on a suspected fault power circuit;
A line parameter threshold determination module for determining a line parameter threshold based on the first line parameter and/or the second line parameter;
the current value receiving module is used for receiving a first current value corresponding to the first detection circuit and a second current value corresponding to the second detection circuit, which are sent by the detection clamp equipment;
and the fault detection module is used for respectively judging whether the first detection circuit and the second detection circuit have faults or not according to the circuit parameter threshold value, the first current value and the second current value.
In a third aspect, embodiments of the present application further provide an electronic device, including:
one or more processors;
storage means for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of the first aspect described above.
In a fourth aspect, embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the method of the first aspect described above.
In a fifth aspect, embodiments of the present application also provide a computer program product comprising computer executable instructions for implementing the method of the first aspect described above when executed.
The technical scheme provided by the application has the following beneficial effects:
in this embodiment, when line fault detection is performed, the current difference may be caused by physical differences of the line in addition to the line fault, so that a line parameter threshold determined based on the line parameter is introduced in the fault detection process, and the current difference caused by the actual physical differences of the line is considered, so that compared with the case that the first current value is directly compared with the second current value, the fault detection accuracy can be improved.
Meanwhile, the method of the embodiment is adopted to detect the faults of the power line, and the multipoint pedaling is not needed by manpower, so that the efficiency and the safety of fault detection are improved.
Drawings
Fig. 1 is a schematic diagram of connection between a fault inspection terminal and a detection clamp device provided by the application;
fig. 2 is a schematic diagram of the fault detection of the overhead line by combining the fault inspection terminal and the detection clamp device;
fig. 3 is a flowchart of an embodiment of a method for detecting a power line according to an embodiment of the present application;
fig. 4 is a flowchart of an embodiment of a method for detecting a power line according to the second embodiment of the present application;
fig. 5 is a schematic diagram of a hanging point and a detecting circuit according to a second embodiment of the present disclosure;
Fig. 6 is a schematic diagram of fault notification provided in a second embodiment of the present application;
fig. 7 is a block diagram of an embodiment of a device for detecting a power line according to the third embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings.
The embodiment of the application provides a method for detecting a power line, which can be applied to a fault inspection terminal, as shown in fig. 1, wherein the fault inspection terminal can be connected with a detection clamp device. The fault inspection terminal and the detection clamp device can adopt wireless communication or wired communication, which is not limited in this embodiment. Through the collocation detection pincers equipment use, the trouble inspection terminal can accurately find single-phase metallic ground connection, through electric arc ground connection, through the grounding of resistance, insulator breakdown, arrester breakdown etc. hidden ground fault of overhead line, is particularly suitable for the fault line that has the cable branch. Further, the short-circuit capability of the fault inspection terminal is strong, and the direct short-circuit fault with the grounding resistance of 0 omega can be detected.
Specifically, the fault inspection terminal may perform ground fault localization of multiple lines. After the overhead line is stopped, a section-by-section test is started from one end of the line, a low-frequency high-voltage signal is applied to the line by a detection clamp device, currents at the left side and the right side are detected, and the directions of the ground fault points are displayed on a host machine through analysis of the currents at the left side and the right side and the impedance (for example, the directions at the left side and the right side are represented by yellow directions and red directions). The detection clamp device is provided with corresponding detection ends, such as a yellow end corresponding to a yellow direction and a red end corresponding to a red direction, and is used for testing segment by segment along the direction indicated by the fault point, wherein before the fault point, the test result shows that the fault point is behind the fault point, and after the fault point, the detection result shows that the fault point is in front of the fault point, so that the fault point is approximated segment by segment, and the fault position is determined.
The fault inspection terminal comprises a display screen (for example, a 7-inch color screen), the clapping direction can be displayed on the display screen, the fault direction is clear, and the test result is clear at a glance. Besides, the fault inspection terminal can also have a voice broadcasting function, and the line fault direction is prompted by voice, so that the on-site operation is easier.
The detection clamp device integrates signal emission and collection, has the structure of a clamp structure, is small in size, light in weight and convenient to hang, can complete line fault finding by one-time hanging, does not need to operate by outputting signals and collecting signals in two places, is convenient and quick to test, reduces the number of operators, greatly lightens the working strength of the test, and improves the working efficiency. Meanwhile, the detection clamp device is provided with a non-contact electroscope, so that whether a cable line is electrified or not can be checked, an audible and visual alarm is given out, and the safety of operators and equipment is ensured.
In one scenario, the detection clamp device may be used with an insulating rod, which may be a telescopic insulating rod, and after the insulating rod is connected to the detection clamp device, a worker may use the insulating rod to hook the detection clamp device onto an overhead line. When the test clamp equipment is hung on the overhead line, the hanging position and the closing of the jaws are ensured.
The fault inspection terminal also has a Bluetooth communication function, and can test the mobile phone after downloading the APP, check the test result and review the history record.
The fault inspection terminal and the detection clamp equipment are both provided with large-capacity rechargeable batteries, and the inspection work of the whole line can be completed after the rechargeable batteries are fully charged.
When the power line is detected, after the overhead line is stopped, a fault inspection terminal outputs a low-frequency high-voltage signal to the detection clamp device, alternating-current voltage signals are respectively applied to the line through the transmitting clamps on the left side and the right side of the detection clamp device, and the high-sensitivity current transformers in the middle of the detection clamp device detect the current amplitude and the phase on the two sides. The current passes through the fault inspection terminal and the detection clamp device, flows through the fault line, goes into the ground at the grounding fault point and returns to the fault inspection terminal through the grounding needle.
The fault inspection terminal outputs a high-voltage alternating current signal, the distributed capacitor and the fault grounding resistor form an RC parallel circuit, the current load is a capacitive load or an inductive load through detecting the voltage and the current signals at two sides of the circuit and the phase between the voltage and the current, and the ground fault point is determined to be positioned at the left side or the right side through comparing the pure resistive impedance at the left side and the right side.
And applying high voltage to each hanging point by the fault inspection terminal, alternately applying alternating current signals from two sides of the current transformer through the detection clamp equipment, collecting the high voltage and the current signals by the current transformer, carrying out Fourier transform on data to calculate required data after the detection clamp equipment is collected, and sending the data to the fault inspection terminal for fault judgment processing through wireless communication, so as to judge the fault direction.
The detection clamp device is connected with the line section by section along the line, the fault point is indicated to be positioned at the rear part at a certain point, the next connection point displays the fault point to be positioned at the front part, accordingly, the fault point can be judged to be positioned between the two test points, and the 1/2 method section test is adopted, so that the fault point is gradually approximated.
The working principle of the fault inspection terminal and the detection clamp device for detecting the fault of the overhead line is described by combining with fig. 2 as follows:
in fig. 2, a clamp meter D (i.e., a detection clamp device) is hung on the overhead line to detect a fault condition of the line on the left and right sides of the hanging point C. The metal contact pieces (U1 and U2) on two sides of the clamp meter D are simultaneously contacted with the lead, the change-over switch Z can change the voltage U of the detection power supply T between U1 and U2, currents I1 and I2 are generated on two sides of the hanging point C, the clamp meter D respectively measures the values of the I1 and the I2 and transmits the values to the wireless terminal W (namely a fault inspection terminal), and the fault inspection terminal W can judge the range and the direction of a fault according to the sizes of the I1 and the I2. When the side A is grounded E1, A-E1-E-C-A forms se:Sub>A fault loop, the resistance R1 of the fault loop is obviously smaller than the resistance R2 of the side B without fault (theoretically, the side B is suspended and R2 is infinite), and I1 is larger than I2, so that the fault on the side A can be judged.
However, during actual operation, it was found that either side a or side B may fail in the presence of I1> I2. This is because even if the line does not fail, parameters (length, impedance, insulation, etc.) of the line on both sides of the hitch point C cannot be identical, which causes a difference in current value on both sides of the detected point. In order to more accurately identify line faults, the embodiment of the application considers factors of different line parameters at two sides of the hanging point when identifying faults, as described in the following embodiment.
Example 1
Fig. 3 is a flowchart of an embodiment of a method for detecting a power line, which is provided in an embodiment of the present application, and may be applied to a fault inspection terminal, including the following steps:
step 310, obtaining a first line parameter of a first detection line and a second line parameter of a second detection line, and determining a line parameter threshold based on the first line parameter and/or the second line parameter.
The first detection circuit and the second detection circuit are circuits positioned at two sides of the hanging point when the detection clamp equipment is hung on the suspected fault power line. For example, as shown in fig. 2, the hitch point C divides the suspected faulty power line into: an a detection line located to the left of the hitch point C and a B detection line located to the right of the hitch point C. The hanging point may be a point randomly selected by an operator on the suspected fault power line, or may be a center point of the suspected fault power line, which is not limited in this embodiment.
Illustratively, the line parameters (including the first line parameter and the second line parameter) may include, but are not limited to: line length, applied voltage, etc. Wherein the first detection line and the second detection line are parallel lines, and the applied voltages of the two lines are the same.
In one implementation, the first line parameter and/or the second line parameter may be looked up in a pre-configured parameter configuration table, so as to obtain a matching record matching the first line parameter and/or the second line parameter, and a line parameter threshold value is extracted from the matching record. The "and/or" means that the line parameter threshold may be matched according to the first line parameter, the line parameter threshold may be matched according to the second line parameter, and the final line parameter threshold may be obtained by combining the line parameter threshold matched by the first line parameter and the line parameter threshold matched by the first line parameter.
Illustratively, the line parameter threshold may include an impedance threshold value, which may be obtained from a lookup in a parameter configuration table based on an applied voltage of the first line parameter or the second line parameter.
Step 320, receiving a first current value corresponding to the first detection line and a second current value corresponding to the second detection line, which are sent by the detection clamp device.
When implemented, the fault patrol terminal transmits application voltage information to the detection clamp device, the application voltage information including an application voltage value. After the detection clamp device receives the applied voltage information, corresponding alternating voltage signals are respectively applied to the suspected fault power lines through the transmitting clamps on the left side and the right side. And then detecting the current amplitude values at two sides by a high-sensitivity current transformer in the middle of the detection clamp device to obtain a first current value and a second current value. After the detection clamp device obtains the first current value and the second current value, the first current value and the second current value can be transmitted to the fault inspection terminal.
The applied voltage information sent by the fault inspection terminal to the detection clamp device can be determined according to the following mode: the fault inspection terminal is provided with a main interface menu key, when a user clicks the main interface menu key, the main interface menu key enters a menu option page, and a selectable voltage list can be displayed on the menu option page, for example, the selectable voltage can comprise 3000V, 8000V and the like. The user can select the voltage value to be finally applied by means of physical buttons on the top, bottom, left and right in the terminal, virtual buttons on the page, a touch screen or the like. And after the fault inspection terminal detects the voltage value selected by the user, taking the voltage value as the applied voltage information.
And step 330, judging whether the first detection circuit and the second detection circuit have faults or not according to the circuit parameter threshold, the first current value and the second current value.
After the line parameter threshold is obtained, the first detection line and the second detection line can be judged whether to have faults or not by combining the line parameter threshold, the first current value and the second current value. When line fault detection is carried out, the current difference is possibly caused by physical differences of the lines in addition to the line fault, so that a line parameter threshold value determined based on line parameters is introduced in the fault detection process, the current difference caused by the actual physical differences of the lines is considered, and compared with the case that the first current value and the second current value are directly compared, the fault detection precision can be improved.
Meanwhile, the method of the embodiment is adopted to detect the faults of the power line, and the multipoint pedaling is not needed by manpower, so that the efficiency and the safety of fault detection are improved.
Example two
Fig. 4 is a flowchart of an embodiment of a method for detecting a power line according to a second embodiment of the present application, which may be applied to a fault inspection terminal, where the embodiment is described based on the first embodiment, and in the embodiment, a line parameter threshold is taken as an impedance threshold for example, and the method may include the following steps:
Step 410, obtaining a first line parameter of a first detection line and a second line parameter of a second detection line, and determining an impedance threshold based on the first line parameter and/or the second line parameter.
The first detection circuit and the second detection circuit are circuits positioned at two sides of the hanging point when the detection clamp equipment is hung on the suspected fault power line.
In one embodiment, the first line parameter may comprise a first applied voltage and the second line parameter may comprise a second applied voltage; the step of determining the impedance threshold based on the first line parameter and/or the second line parameter may further include the steps of:
searching the first applied voltage and the second applied voltage in a preset configuration table respectively to obtain a first impedance threshold matched with the first applied voltage and a second impedance threshold matched with the second applied voltage; a final impedance threshold is determined based on the first impedance threshold and the second impedance threshold.
Specifically, the configuration table may be a data table that is pre-imported by a manager or a developer according to actual experience, and impedance thresholds corresponding to different applied voltage values may be recorded in the data table. By looking up the first applied voltage and the second applied voltage in the configuration table, respectively, a first impedance threshold value matching the first applied voltage and a second impedance threshold value matching the second applied voltage can be obtained.
After the first and second impedance thresholds are obtained, in one embodiment, an average of the two may be calculated as the final impedance threshold. In practice, the first detection circuit and the second detection circuit are parallel circuits, so that the first applied voltage and the second applied voltage are the same, and when searching in the configuration table, the first impedance threshold value and the second impedance threshold value searched according to the first applied voltage and the second applied voltage are the same.
In other embodiments, the impedance threshold obtained by matching the first applied voltage may be directly used as the final impedance threshold, or the second impedance threshold obtained by matching the second applied voltage may be directly used as the final impedance threshold.
Wherein the impedance threshold may be a normal impedance range measured when the line is not faulty.
Step 420, receiving a first current value corresponding to the first detection line and a second current value corresponding to the second detection line, which are sent by the detection pliers device.
Step 430, determining a current threshold based on the impedance threshold; and comparing the first current value and the second current value with the current threshold value, respectively.
In one implementation, after the impedance threshold is obtained, the ratio of the applied voltage to the impedance threshold may be determined as the current threshold.
Step 440, if the first current value and the second current value are both less than or equal to the current threshold, determining that no fault occurs in the first detection circuit and the second detection circuit.
If the first current value is I1 and the second current value is I2, the first current value and the second current value are respectively compared with the current threshold K, and if the I1 and the I2 are smaller than or equal to the K, the resistance of the two detection circuits is larger, namely the two detection circuits are not grounded, the next detection is not needed, and the first detection circuit and the second detection circuit positioned on the two sides of the hanging point are directly judged to be fault-free.
Step 450, if the first current value is greater than the current threshold value but the second current value is less than or equal to the current threshold value, calculating a first ratio of the first current value to the second current value;
step 460, if the first ratio is greater than or equal to the first set value, determining that the first detection circuit fails, and the second detection circuit does not fail;
in step 470, if the first ratio is smaller than the first set value, it is determined that neither the first detection line nor the second detection line has a fault.
In this step, if I1> K, and I2< =k, it may be directly determined that the second detection line has not failed according to the reason of step 440.
Further determination is required for the first detection line. First, whether the difference between the first current value and the second current value is large or small is judged, when the first current value and the second current value are implemented, a first ratio N of the first current value and the second current value can be calculated, if N is greater than or equal to a certain value (namely, a first set value), the difference between the first current value and the second current value is larger, and the difference caused by the physical difference of the circuit is smaller, at this time, the first detection circuit can be judged to be faulty. On the contrary, if N is smaller than a certain value (i.e., the first set value), it indicates that the difference between the first current value and the second current value is relatively small, and at this time, it may be preliminarily determined that the difference is a current difference caused by the physical difference of the lines, that is, it is determined that the first detection line has not failed. For example, if N is smaller than the value range (N < 10), it is determined that the first detection line and the second detection line located on both sides of the hitch point are not faulty, assuming that the value range of the first set value is [ 10, ].
Step 480, if the first current value and the second current value are both greater than the current threshold, calculating a second ratio of the first current value to the current threshold and a third ratio of the second current value to the current threshold.
In this step, if I1 and I2 are both greater than K, which means that the resistances of both detection lines are relatively small, both detection lines are suspected of being ground fault, but are not excluded from being caused by the physical parameters of the lines, so that further judgment is required. In further judgment, first, differences between I1 and I2 and the current threshold K are determined, and the differences can be expressed as I1/K (namely a second ratio M1) and I2/K (namely a third ratio M2).
Step 490, if the second ratio and the third ratio are both greater than the preset range value, determining that the first detection circuit and the second detection circuit are both faulty.
In step 4110, if the second ratio is greater than the preset range value and the third ratio is less than the preset range value, it is determined that the first detection circuit fails and the second detection circuit does not fail.
In step 4111, if the second ratio and the third ratio are both smaller than the preset range value, it is determined that no fault occurs in both the first detection circuit and the second detection circuit.
In this step, if M1 and M2 are both greater than the set range value (e.g., 10-100), it is indicated that I1 and I2 deviate from the current threshold value K much, which is a current value indicating that the line has no fault, and thus when I1 and I2 deviate from the current threshold value K much, it is indicated that the resistances of the first detection line and the second detection line are both small, and it can be determined that the first detection line and the second detection line have a ground fault.
If both M1 and M2 are smaller than the set range value (e.g., 10-100), indicating that I1 and I2 are very close to the current threshold K, which is a current value indicating that the line has no fault, it can be determined that neither the first detection line nor the second detection line has a ground fault.
If M1 is greater than the set range value and M2 is less than the set range value (e.g., 10-100), then it may be determined that the first detection line is faulty and the second detection line is not faulty.
In order to enable those skilled in the art to better understand the present embodiment, several examples are listed for illustration according to the determination logic described in steps 440-470, as shown in table 1 below:
TABLE 1
In the fault detection process of the first detection line and the second detection line in steps 430 to 4111, the comparison of the first current value, the second current value, and the current threshold is performed. In other embodiments, fault detection of the first detection line and the second detection line may be implemented based on a comparison of impedances, and in this implementation, the impedance threshold is not required to be converted into a current threshold, but the first current value is converted into a first impedance value, and the second current value is converted into a second impedance value. The first impedance value, the second impedance value, and the impedance threshold value are then compared.
Step 4112, displaying the hanging point, and the first detection line and the second detection line located at two sides of the hanging point through a display device of the fault inspection terminal; and alarming and prompting the first detection circuit and/or the second detection circuit which have faults.
In implementation, the fault inspection terminal may display the hanging point and the first detection line and the second detection line located at two sides of the hanging point through a display screen, as shown in fig. 5, in the display screen, the hanging point C and the a detection line located at the left side of the hanging point C and the B detection line located at the right side of the hanging point C, which are divided by the hanging point C, may be displayed.
When a ground fault is detected on a detected line, an alarm prompt can be given to the detected line with the fault, and the alarm prompt includes at least one of the following exemplary components:
1. a fault indication arrow is displayed in a designated location of the failed first and/or second detection line. For example, if B detects a ground fault on a line as shown in fig. 6, a fault display arrow may be displayed below the line to indicate that the ground fault is occurring on the line.
2. The first detection line and/or the second detection line which are/is in fault are highlighted. For example, in fig. 5, if B detects a ground fault on a line, the line may be highlighted with a color fill, such as by indicating the line with red.
3. And sending out a voice prompt aiming at the first detection line and/or the second detection line which have faults. In order to assist in reminding the fault condition of the subscriber line, a voice reminding mode can be adopted for voice broadcasting.
In this embodiment, a detection point is selected on a failed line after power failure as a hanging point, a detection clamp device is hung on the hanging point, an ac voltage is input to the hanging point by the detection clamp device, current values at the left and right sides of the hanging point are detected, an impedance threshold value determined according to line parameters is combined, a current threshold value is determined according to the impedance threshold value, and when the current values at both sides are smaller than the current threshold value, it is determined that no ground fault occurs on the lines at both sides. If the current value at one side is larger than the current threshold value and the current value at the other side is smaller than the current threshold value, calculating the ratio of the current value larger than the current threshold value to the current value smaller than the current threshold value, if the ratio is smaller than the set value, judging that the lines at both sides have no faults, otherwise, judging that the line corresponding to the current value larger than the current threshold value has faults. If the current values at the two sides are both larger than the current threshold value, the difference between the current value and the current threshold value is determined by comparing the ratio of the current value and the current threshold value, so that whether the line fails or not is judged. By the method, the problem of fault misjudgment caused by inconsistent current values due to the difference of physical parameters of the lines can be avoided, and the identification accuracy of the ground fault is improved.
Example III
Fig. 7 is a block diagram of an embodiment of a device for detecting a power line, where the device may be applied to a fault inspection terminal, where the fault inspection terminal establishes a connection with a detection pliers device, and the device may include the following modules:
a line parameter obtaining module 710, configured to obtain a first line parameter of a first detection line and a second line parameter of a second detection line, where the first detection line and the second detection line are lines located at two sides of a hanging point when the detection clamp device is hung on a suspected fault power line;
a line parameter threshold determination module 720 for determining a line parameter threshold based on the first line parameter and/or the second line parameter;
a current value receiving module 730, configured to receive a first current value corresponding to the first detection line and a second current value corresponding to the second detection line, which are sent by the detection pliers device;
the fault detection module 740 is configured to determine whether the first detection line and the second detection line have faults according to the line parameter threshold, the first current value, and the second current value, respectively.
In one embodiment, the line parameter threshold comprises an impedance threshold; the fault detection module 740 is specifically configured to:
determining a current threshold based on the impedance threshold;
comparing the first current value and the second current value with the current threshold value respectively;
and if the first current value and the second current value are smaller than or equal to the current threshold value, judging that no faults occur in the first detection circuit and the second detection circuit.
In one embodiment, the fault detection module 740 is further configured to:
if the first current value is greater than the current threshold value but the second current value is less than or equal to the current threshold value, calculating a first ratio of the first current value to the second current value;
if the first ratio is greater than or equal to a first set value, judging that the first detection circuit fails and the second detection circuit does not fail;
and if the first ratio is smaller than a first set value, judging that the first detection circuit and the second detection circuit have no faults.
In one embodiment, the fault detection module 740 is further configured to:
if the first current value and the second current value are both larger than the current threshold, calculating a second ratio of the first current value to the current threshold and a third ratio of the second current value to the current threshold;
If the second ratio and the third ratio are both larger than the preset range value, judging that the first detection circuit and the second detection circuit are both faulty;
if the second ratio is larger than a preset range value and the third ratio is smaller than the preset range value, judging that the first detection circuit fails and the second detection circuit does not fail;
and if the second ratio and the third ratio are smaller than the preset range value, judging that the first detection circuit and the second detection circuit have no faults.
In one embodiment, the first line parameter comprises a first applied voltage and the second line parameter comprises a second applied voltage; the circuit parameter threshold determining module 720 is specifically configured to:
searching the first applied voltage and the second applied voltage in a preset configuration table respectively to obtain a first line parameter threshold value matched with the first applied voltage and a second line parameter threshold value matched with the second applied voltage;
a final line parameter threshold is determined based on the first line parameter threshold and/or the second line parameter threshold.
In one embodiment, the apparatus may further comprise the following modules:
the display module is used for displaying the hanging point, the first detection line and the second detection line which are positioned at two sides of the hanging point through a display device of the fault inspection terminal;
and the alarm prompting module is used for prompting the alarm of the first detection circuit and/or the second detection circuit which have faults.
In one embodiment, the alarm prompting module is specifically configured to:
displaying a fault indication arrow in a designated position of the first detection line and/or the second detection line where the fault occurs;
highlighting the first detection line and/or the second detection line with faults;
and sending out a voice prompt aiming at the first detection line and/or the second detection line which have faults.
The device for detecting the power line provided by the embodiment of the application can execute the method for detecting the power line in the first embodiment and the second embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method.
Example IV
Fig. 8 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application, and as shown in fig. 8, the electronic device includes a processor 810, a memory 820, an input device 830 and an output device 840; the number of processors 810 in the electronic device may be one or more, one processor 810 being taken as an example in fig. 8; the processor 810, memory 820, input device 830, and output device 840 in the electronic device may be connected by a bus or other means, for example in fig. 8.
The memory 820 is a computer readable storage medium, and may be used to store a software program, a computer executable program, and modules, such as program instructions/modules corresponding to the first and second embodiments in the embodiments of the present application. The processor 810 executes various functional applications of the electronic device and data processing by running software programs, instructions and modules stored in the memory 820, i.e., implements the methods mentioned in the above-described method embodiments one and two.
Memory 820 may include primarily a program storage area and a data storage area, wherein the program storage area may store an operating system, at least one application program required for functionality; the storage data area may store data created according to the use of the terminal, etc. In addition, memory 820 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 820 may further include memory located remotely from processor 810, which may be connected to the device/terminal/server via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 830 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the electronic device. The output device 840 may include a display device such as a display screen.
Example five
The fifth embodiment of the present application also provides a storage medium containing computer-executable instructions for performing the methods of the first and second embodiments of the method described above when executed by a computer processor.
Of course, a storage medium containing computer-executable instructions provided in the embodiments of the present application is not limited to the method operations described above, and may also perform related operations in the methods provided in any of the embodiments of the present application.
Example six
The sixth embodiment of the present application also provides a computer program product comprising computer executable instructions for performing the method of the first and second embodiments of the method described above when executed by a computer processor.
Of course, the computer program product provided by the embodiments of the present application, whose computer executable instructions are not limited to the method operations described above, may also perform the relevant operations in the methods provided by any of the embodiments of the present application.
From the above description of embodiments, it will be clear to a person skilled in the art that the present application may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk, or an optical disk of a computer, etc., including several instructions for causing an electronic device (which may be a personal computer, a server, or a network device, etc.) to perform the method described in the embodiments of the present application.
It should be noted that, in the embodiment of the apparatus, each unit and module included are only divided according to the functional logic, but not limited to the above-mentioned division, so long as the corresponding function can be implemented; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the present application.
Note that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will appreciate that the present application is not limited to the particular embodiments described herein, but is capable of numerous obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the present application. Therefore, while the present application has been described in connection with the above embodiments, the present application is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the present application, the scope of which is defined by the scope of the appended claims.
Claims (8)
1. The method for detecting the power line is characterized by being applied to a fault inspection terminal, wherein the fault inspection terminal is connected with detection clamp equipment, and the method comprises the following steps:
acquiring a first line parameter of a first detection line and a second line parameter of a second detection line, and determining a line parameter threshold based on the first line parameter and/or the second line parameter, wherein the first detection line and the second detection line are lines positioned at two sides of a hanging point when the detection clamp equipment is hung on a suspected fault power line;
Receiving a first current value corresponding to the first detection circuit and a second current value corresponding to the second detection circuit, which are sent by the detection clamp equipment;
judging whether the first detection circuit and the second detection circuit have faults or not according to the circuit parameter threshold value, the first current value and the second current value;
wherein the line parameter threshold comprises an impedance threshold;
the step of respectively judging whether the first detection circuit and the second detection circuit have faults according to the circuit parameter threshold, the first current value and the second current value comprises the following steps:
determining a current threshold based on the impedance threshold;
comparing the first current value and the second current value with the current threshold value respectively;
if the first current value and the second current value are smaller than or equal to the current threshold value, judging that no faults occur in the first detection circuit and the second detection circuit;
the step of judging whether the first detection circuit and the second detection circuit have faults according to the circuit parameter threshold, the first current value and the second current value respectively, and the step of further comprising:
If the first current value is greater than the current threshold value but the second current value is less than or equal to the current threshold value, calculating a first ratio of the first current value to the second current value;
if the first ratio is greater than or equal to a first set value, judging that the first detection circuit fails and the second detection circuit does not fail;
and if the first ratio is smaller than a first set value, judging that the first detection circuit and the second detection circuit have no faults.
2. The method of claim 1, wherein determining whether the first and second detection lines are faulty based on the line parameter threshold, the first current value, and the second current value, respectively, further comprises:
if the first current value and the second current value are both larger than the current threshold, calculating a second ratio of the first current value to the current threshold and a third ratio of the second current value to the current threshold;
if the second ratio and the third ratio are both larger than the preset range value, judging that the first detection circuit and the second detection circuit are both faulty;
If the second ratio is larger than a preset range value and the third ratio is smaller than the preset range value, judging that the first detection circuit fails and the second detection circuit does not fail;
and if the second ratio and the third ratio are smaller than the preset range value, judging that the first detection circuit and the second detection circuit have no faults.
3. The method of any of claims 1-2, wherein the first line parameter comprises a first applied voltage and the second line parameter comprises a second applied voltage; the determining a line parameter threshold based on the first line parameter and/or the second line parameter comprises:
searching the first applied voltage and the second applied voltage in a preset configuration table respectively to obtain a first line parameter threshold value matched with the first applied voltage and a second line parameter threshold value matched with the second applied voltage;
a final line parameter threshold is determined based on the first line parameter threshold and/or the second line parameter threshold.
4. The method according to any one of claims 1-2, wherein the method further comprises:
Displaying the hanging point, a first detection line and a second detection line which are positioned at two sides of the hanging point through a display device of the fault inspection terminal;
and alarming and prompting the first detection circuit and/or the second detection circuit which have faults.
5. The method of claim 4, wherein the alert prompt includes at least one of:
displaying a fault indication arrow in a designated position of the first detection line and/or the second detection line where the fault occurs;
highlighting the first detection line and/or the second detection line with faults;
and sending out a voice prompt aiming at the first detection line and/or the second detection line which have faults.
6. An apparatus for power line detection, the apparatus being applied to a fault patrol terminal, the fault patrol terminal establishing connection with a detection clamp device, the apparatus comprising:
the circuit parameter acquisition module is used for acquiring a first circuit parameter of a first detection circuit and a second circuit parameter of a second detection circuit, wherein the first detection circuit and the second detection circuit are circuits positioned at two sides of a hanging point when the detection clamp equipment is hung on a suspected fault power circuit;
A line parameter threshold determination module for determining a line parameter threshold based on the first line parameter and/or the second line parameter;
the current value receiving module is used for receiving a first current value corresponding to the first detection circuit and a second current value corresponding to the second detection circuit, which are sent by the detection clamp equipment;
the fault detection module is used for judging whether the first detection circuit and the second detection circuit have faults or not according to the circuit parameter threshold value, the first current value and the second current value;
the line parameter threshold comprises an impedance threshold; the fault detection module is used for: determining a current threshold based on the impedance threshold;
comparing the first current value and the second current value with the current threshold value respectively;
if the first current value and the second current value are smaller than or equal to the current threshold value, judging that no faults occur in the first detection circuit and the second detection circuit;
the fault detection module is further configured to: if the first current value is greater than the current threshold value but the second current value is less than or equal to the current threshold value, calculating a first ratio of the first current value to the second current value;
If the first ratio is greater than or equal to a first set value, judging that the first detection circuit fails and the second detection circuit does not fail;
and if the first ratio is smaller than a first set value, judging that the first detection circuit and the second detection circuit have no faults.
7. An electronic device, the electronic device comprising:
one or more processors;
storage means for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-5.
8. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any of claims 1-5.
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