A method and system for monitoring power transmission line faults

Abstract

The present invention discloses a method and system for monitoring a power transmission line fault, which obtains monitoring data of a power transmission line; analyzes the fault code to obtain an initial fault type; determines a target load based on a target power transmission line corresponding to the fault code and a data acquisition position of the target power transmission line, performs voltage and current analysis on the target load and the electrical data of the target power transmission line, and determines an intermediate fault type; determines whether the intermediate fault type is the same as the initial fault type; if so, determines a final fault type based on the initial fault type and the voltage and current analysis results; if not, records the data acquisition position of the target power transmission line, and sends the data acquisition position to a maintenance personnel, so that the maintenance personnel go to the data acquisition position to troubleshoot the fault. The present invention improves the accuracy of power transmission line fault monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid line fault monitoring, and in particular to a method and system for monitoring power transmission line faults. Background Art

[0002] The existing technology usually performs troubleshooting by identifying fault codes transmitted by transmission lines. However, due to the complex situations encountered by transmission lines in power grids, there is a risk of misjudgment when confirming faults simply through fault codes, resulting in low accuracy in transmission line fault judgment using existing technology.

[0003] Therefore, there is an urgent need for a transmission line fault monitoring strategy to solve the problem of low accuracy in transmission line fault judgment in the prior art. Summary of the invention

[0004] The embodiment of the present invention provides a method and system for monitoring a power transmission line fault, so as to solve the problem of low accuracy in judging a power transmission line fault in the prior art.

[0005] In order to solve the above problem, an embodiment of the present invention provides a method for monitoring a power transmission line fault, comprising:

[0006] Acquire monitoring data of a power transmission line; wherein the monitoring data includes: a fault code and electrical data corresponding to a load on the line; the load is arranged on the power transmission line;

[0007] Analyze the fault code to obtain the initial fault type; wherein the initial fault type includes: insulation fault, ground fault, jumper fault, short circuit fault, open circuit fault and flashover fault;

[0008] Based on the target transmission line corresponding to the fault code, determine the target load according to the data collection position of the target transmission line, perform voltage and current analysis on the electrical data of the target load and the target transmission line, and determine the type of intermediate fault;

[0009] Determine whether the intermediate fault type is the same as the initial fault type; if so, determine the final fault type based on the initial fault type and the voltage and current analysis results; if not, record the data collection location of the target transmission line and send the data collection location to the maintenance personnel so that the maintenance personnel can go to the data collection location to troubleshoot the fault.

[0010] As an improvement of the above solution, the voltage and current analysis of the electrical data of the target load and the target transmission line to determine the type of intermediate fault includes:

[0011] Determine the current of the target transmission line;

[0012] If the current increases by a first preset current threshold within a first preset time, the fault type of the current target transmission line is a current increase fault type, and a voltage analysis is performed on the target transmission line corresponding to the current increase fault type, thereby determining the type of the intermediate fault;

[0013] If the current decreases by the second preset current threshold within the first preset time, the fault type of the current target transmission line is a current reduction fault type, and a voltage analysis is performed on the target transmission line corresponding to the current reduction fault type to determine the intermediate fault type.

[0014] As an improvement of the above solution, the types of intermediate faults include: insulation fault, ground fault, short circuit fault and flashover fault; the voltage analysis of the target transmission line corresponding to the current increase fault type to determine the type of intermediate fault includes:

[0015] Collecting the line voltage and zero-sequence voltage of the target transmission line corresponding to the current increase fault type, and the load voltage of the target load corresponding to the target transmission line;

[0016] If the zero-sequence voltage is greater than the first voltage threshold, a ground fault is determined to occur in the current target transmission line based on a phase monitoring operation; wherein the phase monitoring operation is used to obtain a fault phase, and the ground fault includes: a single-phase ground fault, a two-phase ground fault, and a three-phase ground fault;

[0017] If the line voltage is less than the second voltage threshold within the second preset time and rises to the initial line voltage after the second preset time, it is determined based on the phase monitoring operation that a flashover fault occurs in the current target transmission line; wherein the flashover fault includes: single-phase flashover fault, two-phase flashover fault and three-phase flashover fault;

[0018] When the voltage of each target load corresponding to the target transmission line drops, the voltage drop analysis of the target load is performed to determine whether a short circuit fault or an insulation fault occurs in the current target transmission line.

[0019] As an improvement of the above solution, the decline analysis includes:

[0020] Based on the connection relationship between the target load and the target line, a load distribution diagram is determined with the target line as the center point; wherein each target load has the same color type and different color depth;

[0021] The voltage value reduced by each target load is used as the color depth of each target load in the load distribution diagram to identify the load distribution diagram with color; wherein the color depth increases as the voltage value increases;

[0022] When the target load connected only to the target line appears colored, it is determined based on the phase monitoring operation that a short circuit fault occurs in the current target transmission line; wherein the insulation fault includes: a single-phase short circuit fault, a two-phase short circuit fault and a three-phase short circuit fault;

[0023] When several target loads appear in color, and the color depth of the target loads not connected to the target line increases as the distance from the point decreases, it is determined based on the phase monitoring operation that an insulation fault occurs in the current target transmission line; wherein the insulation fault includes: single-phase insulation fault, two-phase insulation fault and three-phase insulation fault.

[0024] As an improvement of the above solution, the types of intermediate faults include: jumper faults and open circuit faults; the voltage judgment of the target transmission line corresponding to the current reduction fault type, and then determining the type of intermediate faults, includes:

[0025] The collected current reduces the line voltage of the target transmission line corresponding to the fault type;

[0026] If the line voltage is less than the third voltage threshold within the third preset time and rises to the initial line voltage after the third preset time, it is determined based on the phase monitoring operation that a jumper fault occurs in the current target transmission line; the jumper fault includes: a single-phase jumper fault, a two-phase jumper fault and a three-phase jumper fault;

[0027] If the line voltage is 0, based on the phase monitoring operation, it is determined that a circuit breaker fault occurs in the current target transmission line; wherein the circuit breaker fault includes: a single-phase circuit breaker fault, a two-phase circuit breaker fault and a three-phase circuit breaker fault.

[0028] As an improvement of the above solution, the phase monitoring operation includes:

[0029] Obtaining the three-phase electrical data waveform corresponding to the target transmission line and a preset normal waveform profile;

[0030] Perform contour extraction on each phase electrical data waveform to obtain the corresponding waveform contour;

[0031] Calculate the shape similarity between the normal waveform contour and each waveform contour respectively, and obtain the similarity calculation value between each waveform contour and the normal waveform contour;

[0032] If the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 0, a three-phase fault occurs;

[0033] If the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 1, a biphase fault occurs;

[0034] If the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 2, a single-phase fault occurs.

[0035] As an improvement of the above solution, the fault code is analyzed to obtain the initial fault type, including:

[0036] In a preset fault code library, a fault type having the same letter as the letter corresponding to the fault code is used as an initial fault type; wherein the fault code library includes: a plurality of fault code letters, each fault code letter corresponding to a fault type.

[0037] Accordingly, an embodiment of the present invention further provides a power transmission line fault monitoring system, comprising: a data acquisition module, an initial fault determination module, an intermediate fault determination module and a data judgment module;

[0038] The data acquisition module is used to acquire monitoring data of the power transmission line; wherein the monitoring data includes: fault code and electrical data corresponding to the load on the line;

[0039] The initial fault determination module is used to analyze the fault code to obtain the initial fault type; wherein the types of the initial fault type include: insulation fault, ground fault, jumper fault, short circuit fault, open circuit fault and flashover fault;

[0040] The intermediate fault determination module is used to determine the target load based on the target transmission line corresponding to the fault code according to the data collection position of the target transmission line, perform voltage and current analysis on the electrical data of the target load and the target transmission line, and determine the type of the intermediate fault;

[0041] The data judgment module is used to judge whether the intermediate fault type is the same as the initial fault type; if so, determine the final fault type based on the initial fault type and the voltage and current analysis results; if not, record the data collection location of the target transmission line and send the data collection location to the maintenance personnel so that the maintenance personnel can go to the data collection location to troubleshoot the fault.

[0042] Correspondingly, an embodiment of the present invention further provides a computer terminal device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, a transmission line fault monitoring method as described in the present invention is implemented.

[0043] Correspondingly, an embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute a transmission line fault monitoring method as described in the present invention.

[0044] As can be seen from the above, the present invention has the following beneficial effects:

[0045] The present invention provides a method for monitoring a transmission line fault, which includes obtaining monitoring data of a transmission line; analyzing the fault code to obtain an initial fault type; determining a target load based on a target transmission line corresponding to the fault code and a data acquisition position of the target transmission line, performing voltage and current analysis on the electrical data of the target load and the target transmission line to determine an intermediate fault type; determining whether the intermediate fault type is the same as the initial fault type; if so, determining the final fault type based on the initial fault type and the voltage and current analysis results; if not, recording the data acquisition position of the target transmission line, and sending the data acquisition position to maintenance personnel, so that the maintenance personnel go to the data acquisition position to troubleshoot the fault. The present invention makes a preliminary judgment on the fault type identified by the fault code, retrieves the electrical data of the load and line involved in the transmission line generating the fault code, makes a secondary judgment on the fault type through the electrical data, and compares whether the results of the preliminary judgment and the secondary judgment are the same, thereby quickly determining the type of the fault type and improving the accuracy of the transmission line fault monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a flow chart of a method for monitoring a power transmission line fault provided by an embodiment of the present invention;

[0047] Figure 2 is a schematic structural diagram of a power transmission line fault monitoring system provided by an embodiment of the present invention;

[0048] Figure 3 It is a schematic diagram of the structure of a terminal device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Embodiment 1

[0051] See also Figure 1 , Figure 1 FIG. 1 is a flow chart of a method for monitoring a power transmission line fault provided by an embodiment of the present invention. Figure 1 As shown, this embodiment includes steps 101 to 104, and each step is specifically as follows:

[0052] Step 101: Acquire monitoring data of a power transmission line; wherein the monitoring data includes: a fault code and electrical data corresponding to a load on the line.

[0053] In this embodiment, data collected by sensors is received, and data is extracted based on a big data model to obtain fault codes and electrical numbers corresponding to the line load.

[0054] Step 102: Analyze the fault code to obtain an initial fault type; wherein the initial fault type includes: insulation fault, ground fault, jumper fault, short circuit fault, open circuit fault and flashover fault.

[0055] In this embodiment, analyzing the fault code to obtain the initial fault type includes:

[0056] In a preset fault code library, a fault type having the same letter as the letter corresponding to the fault code is used as an initial fault type; wherein the fault code library includes: a plurality of fault code letters, each fault code letter corresponding to a fault type.

[0057] In a specific embodiment, the fault code library is obtained by inputting the fault codes into a database in advance and associating the corresponding fault types together.

[0058] To better illustrate the fault codes, the following examples are provided: a phase-to-ground fault is "G1", a two-phase-to-ground fault is "G2", a three-phase-to-ground fault is "G3", etc.

[0059] Step 103: Based on the target transmission line corresponding to the fault code, determine the target load according to the data collection position of the target transmission line, perform voltage and current analysis on the electrical data of the target load and the target transmission line, and determine the type of intermediate fault.

[0060] In this embodiment, the voltage and current analysis of the electrical data of the target load and the target transmission line to determine the type of intermediate fault includes:

[0061] Determine the current of the target transmission line;

[0062] If the current increases by a first preset current threshold within a first preset time, the fault type of the current target transmission line is a current increase fault type, and a voltage analysis is performed on the target transmission line corresponding to the current increase fault type, thereby determining the type of the intermediate fault;

[0063] If the current decreases by the second preset current threshold within the first preset time, the fault type of the current target transmission line is a current reduction fault type, and a voltage analysis is performed on the target transmission line corresponding to the current reduction fault type to determine the intermediate fault type.

[0064] It should be noted that the first preset time, the first preset current threshold, and the second preset current threshold can be adaptively modified based on user needs.

[0065] As an improvement of the above solution, the types of intermediate faults include: insulation fault, ground fault, short circuit fault and flashover fault; the voltage analysis of the target transmission line corresponding to the current increase fault type to determine the type of intermediate fault includes:

[0066] Collecting the line voltage and zero-sequence voltage of the target transmission line corresponding to the current increase fault type, and the load voltage of the target load corresponding to the target transmission line;

[0067] If the zero-sequence voltage is greater than the first voltage threshold, a ground fault is determined to occur in the current target transmission line based on a phase monitoring operation; wherein the phase monitoring operation is used to obtain a fault phase, and the ground fault includes: a single-phase ground fault, a two-phase ground fault, and a three-phase ground fault;

[0068] If the line voltage is less than the second voltage threshold within the second preset time and rises to the initial line voltage after the second preset time, it is determined based on the phase monitoring operation that a flashover fault occurs in the current target transmission line; wherein the flashover fault includes: single-phase flashover fault, two-phase flashover fault and three-phase flashover fault;

[0069] When the voltage of each target load corresponding to the target transmission line drops, the voltage drop analysis of the target load is performed to determine whether a short circuit fault or an insulation fault occurs in the current target transmission line.

[0070] It should be noted that the second preset time, the first voltage threshold, and the second voltage threshold can be adaptively modified based on user needs.

[0071] In a specific embodiment, for a line where a ground fault occurs, the current of the fault phase will rise sharply, forming a large ground current flowing to the ground, while the current of the non-fault phase will fluctuate slightly mainly depending on the load condition. The ground fault will cause the voltage of the fault phase to decrease or even become zero, and the voltage of the non-fault phase may increase, which may cause a phase-to-phase short circuit in severe cases, resulting in a larger fault range.

[0072] In the case of a ground fault, due to the asymmetry of the power system, zero-sequence current and zero-sequence voltage will be generated. The zero-sequence voltage law depends on the change of zero-sequence voltage caused by the fault, and the fault is determined by detecting the amplitude and phase of the zero-sequence voltage. In the case of a single-phase ground fault, the zero-sequence voltage at the fault point is the highest. The farther away from the fault point in the system, the lower the zero-sequence voltage is, which depends on the impedance between the measuring point and the earth. Therefore, by measuring the zero-sequence voltage at different points, it can help determine the location of the fault. When a ground short circuit occurs in a neutral point directly grounded system (also known as a large grounding current system), a large zero-sequence voltage and current will appear. In a neutral point not directly grounded system, when a single-phase grounding occurs, a zero-sequence voltage will also be generated.

[0073] In a specific embodiment, for a line where a flashover fault occurs, when a flashover fault occurs, a transient current may be generated at the fault point, and the current may be caused by arc generation or local breakdown of insulating materials. At the moment of flashover, the voltage on the line may drop transiently due to the sudden increase in current. If the flashover lasts for a long time, the voltage may remain at a low level for a long time.

[0074] In a specific embodiment, for a line where a short circuit occurs, when a short circuit occurs, the impedance of the circuit decreases sharply, and the current increases rapidly, which may reach several times or even dozens of times the normal working current. The short circuit fault will cause the voltage in the power grid to drop, especially the voltage drop near the short circuit point is most obvious.

[0075] In a specific embodiment, for a line where an insulation fault occurs, the current in the electrical equipment connecting the fault point and the power supply will increase, while the voltage on the electrical equipment around the fault point will decrease. The closer the electrical distance to the fault point, the more serious the voltage drop, even to zero.

[0076] As an improvement of the above solution, the decline analysis includes:

[0077] Based on the connection relationship between the target load and the target line, a load distribution diagram is determined with the target line as the center point; wherein each target load has the same color type and different color depth;

[0078] The voltage value reduced by each target load is used as the color depth of each target load in the load distribution diagram to identify the load distribution diagram with color; wherein the color depth increases as the voltage value increases;

[0079] When the target load connected only to the target line appears colored, it is determined based on the phase monitoring operation that a short circuit fault occurs in the current target transmission line; wherein the insulation fault includes: a single-phase short circuit fault, a two-phase short circuit fault and a three-phase short circuit fault;

[0080] When several target loads appear in color, and the color depth of the target loads not connected to the target line increases as the distance from the point decreases, it is determined based on the phase monitoring operation that an insulation fault occurs in the current target transmission line; wherein the insulation fault includes: single-phase insulation fault, two-phase insulation fault and three-phase insulation fault.

[0081] In a specific embodiment, the load voltage drop is indicated by color, so that the recognition degree of the load voltage drop can be improved, and the type of circuit fault can be quickly identified from the perspective of the image by comparing the color depth, thereby improving the recognition efficiency of the circuit fault when the current of the target transmission line increases and the voltage of each target load corresponding to the target transmission line decreases.

[0082] As an improvement of the above solution, the types of intermediate faults include: jumper faults and open circuit faults; the voltage judgment of the target transmission line corresponding to the current reduction fault type, and then determining the type of intermediate faults, includes:

[0083] The collected current reduces the line voltage of the target transmission line corresponding to the fault type;

[0084] If the line voltage is less than the third voltage threshold within the third preset time and rises to the initial line voltage after the third preset time, it is determined based on the phase monitoring operation that a jumper fault occurs in the current target transmission line; the jumper fault includes: a single-phase jumper fault, a two-phase jumper fault and a three-phase jumper fault;

[0085] If the line voltage is 0, based on the phase monitoring operation, it is determined that a circuit breaker fault occurs in the current target transmission line; wherein the circuit breaker fault includes: a single-phase circuit breaker fault, a two-phase circuit breaker fault and a three-phase circuit breaker fault.

[0086] It should be noted that the third preset time and the third voltage threshold can be adaptively modified based on user needs.

[0087] In a specific embodiment, for a line where a jumper fault occurs, the jumper fault may cause a sudden decrease in current, such as a jumper break or poor contact, which may cause current interruption or a significant decrease; the jumper fault may affect the voltage stability of the line. For example, if the jumper is broken, the voltage may drop, affecting the quality of power supply.

[0088] In a specific embodiment, for a line where a short circuit fault occurs, the short circuit fault may cause a sudden change in current. If a short circuit occurs, the current may drop sharply or even drop to zero, because the continuity of the circuit is interrupted and the current cannot flow. The short circuit fault may cause the voltage to drop or disappear. In particular, the voltage of the equipment near the fault point may drop to zero, while the voltage of the equipment far from the fault point may drop but will not disappear completely.

[0089] In this embodiment, the phase monitoring operation includes:

[0090] Obtaining the three-phase electrical data waveform corresponding to the target transmission line and a preset normal waveform profile;

[0091] Perform contour extraction on each phase electrical data waveform to obtain the corresponding waveform contour;

[0092] Calculate the shape similarity between the normal waveform contour and each waveform contour respectively, and obtain the similarity calculation value between each waveform contour and the normal waveform contour;

[0093] If the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 0, a three-phase fault occurs;

[0094] If the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 1, a biphase fault occurs;

[0095] If the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 2, a single-phase fault occurs.

[0096] In a specific embodiment, the phase monitoring operation is specifically:

[0097] 1. Data acquisition: Obtain the three-phase electrical data waveform corresponding to the target transmission line, which can be achieved through the deployment of intelligent sensors and data acquisition systems in the line. These data may include time series data of voltage and current.

[0098] 2. Waveform contour extraction: Extract the contour of each phase electrical data waveform to obtain the corresponding waveform contour. This can be achieved through signal processing technology, such as Hilbert transform. Hilbert transform can provide an analytical signal of a signal, the real part of which is the original signal, and the imaginary part is the envelope of the signal. By taking the modulus of the analytical signal, we can get the envelope of the signal, that is, the waveform contour.

[0099] 3. Similarity calculation: Calculate the shape similarity between the normal waveform profile and each waveform profile to obtain the similarity calculation value between each waveform profile and the normal waveform profile. Similarity calculation can be achieved through a variety of methods, such as cosine similarity, Euclidean distance, Pearson correlation coefficient, etc.

[0100] 4. Fault judgment: If the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 0, a three-phase fault occurs; if the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 1, a two-phase fault occurs; if the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 2, a single-phase fault occurs.

[0101] It should be noted that the signal envelope: The envelope of the signal can be regarded as the outline of the signal waveform, which represents the amplitude change trend of the signal. By analyzing the shape of the envelope, we can identify abnormal patterns in the signal, which may be related to line faults. Similarity calculation: By comparing the similarity of the actual waveform profile with the normal waveform profile, we can quantify the difference between them. If the similarity is below a certain threshold, this indicates that the waveform has changed significantly, which may indicate the presence of a line fault.

[0102] Step 104: Determine whether the intermediate fault type is the same as the initial fault type; if so, determine the final fault type based on the initial fault type and the voltage and current analysis results; if not, record the data collection location of the target transmission line and send the data collection location to the maintenance personnel so that the maintenance personnel can go to the data collection location to troubleshoot the fault.

[0103] See also Figure 2 , Figure 2 1 is a schematic diagram of the structure of a power transmission line fault monitoring system provided by an embodiment of the present invention, comprising: a data acquisition module 201, an initial fault determination module 202, an intermediate fault determination module 203 and a data judgment module 204;

[0104] The data acquisition module is used to acquire monitoring data of the power transmission line; wherein the monitoring data includes: fault code and electrical data corresponding to the load on the line;

[0105] The initial fault determination module is used to analyze the fault code to obtain the initial fault type; wherein the types of the initial fault type include: insulation fault, ground fault, jumper fault, short circuit fault, open circuit fault and flashover fault;

[0106] The intermediate fault determination module is used to determine the target load based on the target transmission line corresponding to the fault code according to the data collection position of the target transmission line, perform voltage and current analysis on the electrical data of the target load and the target transmission line, and determine the type of the intermediate fault;

[0107] The data judgment module is used to judge whether the intermediate fault type is the same as the initial fault type; if so, determine the final fault type based on the initial fault type and the voltage and current analysis results; if not, record the data collection location of the target transmission line and send the data collection location to the maintenance personnel so that the maintenance personnel can go to the data collection location to troubleshoot the fault.

[0108] It can be understood that the above-mentioned system item embodiment corresponds to the method item embodiment of the present invention, and it can implement the transmission line fault monitoring method provided by any one of the above-mentioned method item embodiments of the present invention.

[0109] This embodiment obtains the initial fault type by analyzing the fault code; based on the target transmission line corresponding to the fault code, the target load is determined according to the data collection position of the target transmission line, and the voltage and current analysis is performed on the electrical data of the target load and the target transmission line to determine the intermediate fault type; it is determined whether the intermediate fault type is the same as the initial fault type; if so, the final fault type is determined based on the initial fault type and the voltage and current analysis results; if not, the data collection position of the target transmission line is recorded, and the data collection position is sent to the maintenance personnel, so that the maintenance personnel go to the data collection position for troubleshooting. The present invention makes a preliminary judgment on the fault type identified by the fault code, retrieves the electrical data of the load and line involved in the transmission line where the fault code is generated, makes a secondary judgment on the fault type through the electrical data, and compares whether the results of the preliminary judgment and the secondary judgment are the same, thereby quickly determining the type of fault type and improving the accuracy of transmission line fault monitoring.

[0110] Embodiment 2

[0111] See also Figure 3 , Figure 3 It is a schematic diagram of the structure of a terminal device provided in one embodiment of the present invention.

[0112] A terminal device of this embodiment includes: a processor 301, a memory 302, and a computer program stored in the memory 302 and executable on the processor 301. When the processor 301 executes the computer program, the steps of the above-mentioned power transmission line fault monitoring method in the embodiment are implemented, for example: Figure 1 Alternatively, when the processor executes the computer program, the functions of each module in the above-mentioned system embodiments are realized, for example: Figure 2 All modules of the transmission line fault monitoring system are shown.

[0113] In addition, an embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the transmission line fault monitoring method described in any of the above embodiments.

[0114] Those skilled in the art will understand that the schematic diagram is merely an example of a terminal device and does not constitute a limitation on the terminal device. The terminal device may include more or fewer components than shown in the diagram, or a combination of certain components, or different components. For example, the terminal device may also include input and output devices, network access devices, buses, etc.

[0115] The processor 301 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor 301 is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0116] The memory 302 can be used to store the computer program and / or module. The processor 301 implements various functions of the terminal device by running or executing the computer program and / or module stored in the memory and calling the data stored in the memory 302. The memory 302 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.). In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0117] Wherein, if the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or system that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0118] It should be noted that the system embodiment described above is merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the drawings of the system embodiment provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0119] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for monitoring a power transmission line fault, characterized in that: include: Acquire monitoring data of the transmission line; wherein the monitoring data includes: fault code and electrical data corresponding to the load on the line; Analyze the fault code to obtain the initial fault type; wherein the initial fault type includes: insulation fault, ground fault, jumper fault, short circuit fault, open circuit fault and flashover fault; Based on the target transmission line corresponding to the fault code, determine the target load according to the data collection position of the target transmission line, perform voltage and current analysis on the electrical data of the target load and the target transmission line, and determine the type of intermediate fault; Determine whether the intermediate fault type is the same as the initial fault type; if so, determine the final fault type based on the initial fault type and the voltage and current analysis results; if not, record the data collection location of the target transmission line and send the data collection location to the maintenance personnel so that the maintenance personnel go to the data collection location to troubleshoot the fault; The voltage and current analysis of the electrical data of the target load and the target transmission line to determine the intermediate fault type includes: judging the current of the target transmission line; if the current increases by a first preset current threshold within a first preset time, the fault type of the current target transmission line is a current increase fault type, and a voltage analysis is performed on the target transmission line corresponding to the current increase fault type to determine the intermediate fault type; if the current decreases by a second preset current threshold within the first preset time, the fault type of the current target transmission line is a current decrease fault type, and a voltage analysis is performed on the target transmission line corresponding to the current decrease fault type to determine the intermediate fault type; Among them, the types of intermediate fault types include: insulation fault, ground fault, short circuit fault and flashover fault; the voltage analysis of the target transmission line corresponding to the current increase fault type, and then determining the type of intermediate fault, includes: collecting the line voltage and zero sequence voltage of the target transmission line corresponding to the current increase fault type, and the load voltage of the target load corresponding to the target transmission line; if the zero sequence voltage is greater than the first voltage threshold, then based on the phase monitoring operation, it is determined that the current target transmission line has a ground fault; wherein, the phase monitoring operation is used to obtain the fault phase, and the ground fault includes: single-phase ground fault, two-phase ground fault and three-phase ground fault; if the line voltage is less than the second voltage threshold within the second preset time and rises to the initial line voltage after the second preset time, then based on the phase monitoring operation, it is determined that the current target transmission line has a flashover fault; wherein, the flashover fault includes: single-phase flashover fault, two-phase flashover fault and three-phase flashover fault; when the voltage of each target load corresponding to the target transmission line drops, the voltage drop analysis of the target load is performed to determine that the current target transmission line has a short circuit fault or an insulation fault.

2. The method for monitoring power transmission line faults according to claim 1, characterized in that: The decline analysis includes: Based on the connection relationship between the target load and the target line, a load distribution diagram is determined with the target line as the center point; wherein each target load has the same color type and different color depth; The voltage value reduced by each target load is used as the color depth of each target load in the load distribution diagram to identify the load distribution diagram with color; wherein the color depth increases as the voltage value increases; When the target load connected only to the target line appears colored, it is determined based on the phase monitoring operation that a short circuit fault occurs in the current target transmission line; wherein the insulation fault includes: a single-phase short circuit fault, a two-phase short circuit fault and a three-phase short circuit fault; When several target loads appear in color, and the color depth of the target loads not connected to the target line increases as the distance from the point decreases, it is determined based on the phase monitoring operation that an insulation fault occurs in the current target transmission line; wherein the insulation fault includes: single-phase insulation fault, two-phase insulation fault and three-phase insulation fault.

3. The method for monitoring power transmission line faults according to claim 1, characterized in that: The intermediate fault types include: jumper fault and open circuit fault; the voltage judgment of the target transmission line corresponding to the current reduction fault type, and then determining the intermediate fault type, includes: The collected current reduces the line voltage of the target transmission line corresponding to the fault type; If the line voltage is less than the third voltage threshold within the third preset time and rises to the initial line voltage after the third preset time, it is determined based on the phase monitoring operation that a jumper fault occurs in the current target transmission line; the jumper fault includes: a single-phase jumper fault, a two-phase jumper fault and a three-phase jumper fault; If the line voltage is 0, based on the phase monitoring operation, it is determined that a circuit breaker fault occurs in the current target transmission line; wherein the circuit breaker fault includes: a single-phase circuit breaker fault, a two-phase circuit breaker fault and a three-phase circuit breaker fault.

4. The method for monitoring power transmission line faults according to any one of claims 1 to 3, characterized in that: The phase monitoring operation includes: Obtaining the three-phase electrical data waveform corresponding to the target transmission line and a preset normal waveform profile; Perform contour extraction on each phase electrical data waveform to obtain the corresponding waveform contour; Calculate the shape similarity between the normal waveform contour and each waveform contour respectively, and obtain the similarity calculation value between each waveform contour and the normal waveform contour; If the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 0, a three-phase fault occurs; If the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 1, a biphase fault occurs; If the number of waveform contours whose similarity calculation value is greater than the similarity threshold is 2, a single-phase fault occurs.

5. The method for monitoring power transmission line faults according to claim 1, characterized in that: The analyzing the fault code to obtain the initial fault type includes: In a preset fault code library, a fault type having the same letter as the letter corresponding to the fault code is used as an initial fault type; wherein the fault code library includes: a plurality of fault code letters, each fault code letter corresponding to a fault type.

6. A transmission line fault monitoring system, characterized in that: include: Data acquisition module, initial fault determination module, intermediate fault determination module and data judgment module; The data acquisition module is used to acquire monitoring data of the power transmission line; wherein the monitoring data includes: fault code and electrical data corresponding to the load on the line; The initial fault determination module is used to analyze the fault code to obtain the initial fault type; wherein the types of the initial fault type include: insulation fault, ground fault, jumper fault, short circuit fault, open circuit fault and flashover fault; The intermediate fault determination module is used to determine the target load based on the target transmission line corresponding to the fault code according to the data collection position of the target transmission line, perform voltage and current analysis on the electrical data of the target load and the target transmission line, and determine the type of the intermediate fault; The data judgment module is used to judge whether the intermediate fault type is the same as the initial fault type; if so, determine the final fault type based on the initial fault type and the voltage and current analysis results; if not, record the data collection location of the target transmission line and send the data collection location to the maintenance personnel so that the maintenance personnel go to the data collection location to troubleshoot the fault; The voltage and current analysis of the electrical data of the target load and the target transmission line to determine the intermediate fault type includes: judging the current of the target transmission line; if the current increases by a first preset current threshold within a first preset time, the fault type of the current target transmission line is a current increase fault type, and a voltage analysis is performed on the target transmission line corresponding to the current increase fault type to determine the intermediate fault type; if the current decreases by a second preset current threshold within the first preset time, the fault type of the current target transmission line is a current decrease fault type, and a voltage analysis is performed on the target transmission line corresponding to the current decrease fault type to determine the intermediate fault type; Among them, the types of intermediate fault types include: insulation fault, ground fault, short circuit fault and flashover fault; the voltage analysis of the target transmission line corresponding to the current increase fault type, and then determining the type of intermediate fault, includes: collecting the line voltage and zero sequence voltage of the target transmission line corresponding to the current increase fault type, and the load voltage of the target load corresponding to the target transmission line; if the zero sequence voltage is greater than the first voltage threshold, then based on the phase monitoring operation, it is determined that the current target transmission line has a ground fault; wherein, the phase monitoring operation is used to obtain the fault phase, and the ground fault includes: single-phase ground fault, two-phase ground fault and three-phase ground fault; if the line voltage is less than the second voltage threshold within the second preset time and rises to the initial line voltage after the second preset time, then based on the phase monitoring operation, it is determined that the current target transmission line has a flashover fault; wherein, the flashover fault includes: single-phase flashover fault, two-phase flashover fault and three-phase flashover fault; when the voltage of each target load corresponding to the target transmission line drops, the voltage drop analysis of the target load is performed to determine that the current target transmission line has a short circuit fault or an insulation fault.

7. A computer terminal device, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, a transmission line fault monitoring method as claimed in any one of claims 1 to 5 is implemented.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute a power transmission line fault monitoring method as claimed in any one of claims 1 to 5.

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