Discharge fault grade determination method and device of power transmission line, equipment and medium

Abstract

The invention discloses a discharge fault grade determination method, device and equipment of a power transmission line and a medium, and the method comprises the steps: obtaining the traveling wave data of at least one discharge traveling wave of a fault phase, where a discharge fault occurs, of the power transmission line; determining a wave head moment of each discharge traveling wave based on the traveling wave data; determining a voltage initial phase angle of each discharge traveling wave based on the wave head moment and the traveling wave data; and determining the fault level of the discharge fault of the power transmission line based on the at least one voltage initial phase angle. Through the above mode, the wave head moment of the discharge traveling wave is determined according to the traveling wave data of the discharge traveling wave. And calculating the voltage initial phase angle of the fault phase at the traveling wave head moment. The distribution of the initial phase angle of the voltage is analyzed to judge the discharge intensity of the fault phase of the power transmission line so as to determine the fault level of the discharge fault, so that operation and maintenance personnel can judge the severity of the fault according to the fault level so as to take effective measures for processing, and the rationality of deploying first-aid repair personnel and distributing materials is improved.

Description

Technical Field

[0001] The present invention relates to the field of discharge detection technology, and in particular to a method, device, equipment and medium for determining a discharge fault level of a power transmission line. Background Art

[0002] In related technologies, discharge faults are typically identified through manual analysis of discharge waveforms, allowing maintenance on transmission lines experiencing discharge faults. However, this manual approach to troubleshooting discharge faults is labor-intensive and difficult to accurately classify the fault levels of transmission line discharge faults, making it impossible to implement targeted and effective maintenance measures for each fault level. Summary of the Invention

[0003] The present invention provides a method, device, electronic equipment and medium for determining the discharge fault level of a transmission line, so as to solve the technical problem that it is difficult to accurately classify the fault level of a transmission line discharge fault manually, and thus it is impossible to take effective maintenance measures in a targeted manner for different fault levels.

[0004] In a first aspect, a method for determining a discharge fault level of a transmission line is provided, comprising:

[0005] Acquiring traveling wave data of at least one discharge traveling wave of a faulty phase of a transmission line where a discharge fault occurs;

[0006] Based on the traveling wave data, determine the wave crest moment of each discharge traveling wave;

[0007] Determine the voltage initial phase angle of each discharge traveling wave based on the wave front moment and traveling wave data;

[0008] A fault level of a discharge fault of the power transmission line is determined based on at least one voltage initial phase angle.

[0009] In a second aspect, a device for determining a discharge fault level of a transmission line is provided, comprising:

[0010] an acquisition module, configured to acquire traveling wave data of at least one discharge traveling wave of a faulty phase of a transmission line where a discharge fault occurs;

[0011] A first determining module is used to determine the wave crest moment of each discharge traveling wave based on the traveling wave data;

[0012] A second determination module is used to determine the voltage initial phase angle of each discharge traveling wave based on the wave crest moment and the traveling wave data;

[0013] The third determining module is configured to determine a fault level of a discharge fault of the transmission line based on at least one voltage initial phase angle.

[0014] In a third aspect, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for determining the discharge fault level of the transmission line when executing the computer program.

[0015] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for determining the discharge fault level of the transmission line are implemented.

[0016] In the solution implemented by the aforementioned method, device, electronic device, and storage medium for determining the discharge fault level of a transmission line, upon detecting a discharge fault on the transmission line, the moment of the discharge traveling wave's crest is determined based on the detected traveling wave data. The initial voltage phase angle of the faulted phase at the traveling wave's crest is then calculated. The distribution of the initial voltage phase angles is analyzed to determine the discharge intensity of the faulted phase of the transmission line. This allows the fault level of the discharge fault to be accurately determined based on the discharge intensity, thereby determining the severity of the discharge fault. This allows operations and maintenance personnel to take effective measures based on the severity of the fault, improving the rationality of the deployment of repair personnel and the allocation of supplies. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 1 is a flow chart of a method for determining a discharge fault level of a power transmission line according to an embodiment of the present invention;

[0019] Figure 2 2 is a schematic structural diagram of a device for determining a discharge fault level of a power transmission line according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be understood that the drawings in the present invention are only for the purpose of illustration and description and are not used to limit the scope of protection of the present invention.

[0021] In addition, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in the present invention illustrate operations implemented according to some embodiments of the present invention. It should be understood that the operations in the flowcharts may be implemented out of sequence, and steps that do not have a logical contextual relationship may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the present disclosure, may add one or more other operations to the flowcharts, or may remove one or more operations from the flowcharts.

[0022] In addition, the embodiments described in the present invention are only some of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0023] It should be noted that the term "comprising" will be used in the embodiments of the present invention to indicate the presence of the features subsequently claimed, but does not preclude the addition of other features. It should also be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures.

[0024] The following is a detailed description of this case with reference to the relevant drawings in the specification.

[0025] In an embodiment of this specification, when a discharge fault is detected on a transmission line, the moment of the discharge traveling wave's crest is determined based on the detected traveling wave data. The initial voltage phase angle of the faulted phase at the moment of the traveling wave's crest is then calculated. The distribution of the initial voltage phase angles is analyzed to determine the discharge intensity of the faulted phase of the transmission line, thereby accurately determining the severity of the discharge fault. This allows operations and maintenance personnel to take effective measures based on the severity of the fault, improve the rationality of the deployment of repair personnel and material allocation, and enhance the safety and reliability of the power grid.

[0026] In related technologies, discharge faults are usually detected by manually checking discharge waveforms and repairing faulty transmission lines. However, this manual inspection method cannot accurately classify fault levels, which seriously affects the allocation of fault repair materials and personnel, and thus affects the elimination of transmission line defects.

[0027] To address the above issues, this application proposes a method for determining the discharge fault level of a transmission line. When a discharge fault is detected on a transmission line, the method determines the wave crest moment of the discharge traveling wave based on the detected traveling wave data. The method then calculates the voltage initial phase angle of the fault phase at the wave crest moment. The voltage initial phase angle distribution is analyzed to determine the discharge intensity of the faulty phase of the transmission line. This allows the method to accurately determine the fault level of the discharge fault based on the discharge intensity, thereby determining the severity of the discharge fault. This allows operations and maintenance personnel to take effective measures based on the severity of the fault, improving the rationality of deploying repair personnel and allocating supplies, and ultimately enhancing the safety and reliability of the power grid.

[0028] See also Figure 1 This embodiment of the present invention provides a method for determining a discharge fault level of a power transmission line, the method specifically comprising the following steps:

[0029] S10: Acquire traveling wave data of at least one discharge traveling wave of a faulty phase of a transmission line where a discharge fault occurs.

[0030] It is understandable that the execution subject of the present invention may be a device for determining a discharge fault level of a power transmission line, or may be a terminal or a server, which is not limited here. The embodiment of the present invention is described by taking a server as the execution subject as an example.

[0031] The fault phase of a transmission line refers to the phase (A, B, or C) where a discharge occurs. When a discharge fault is detected, the amplitudes of the three-phase traveling waves are compared. The phase with the highest amplitude and the most distorted waveform is identified as the fault phase. Each time a traveling wave is generated, data is collected, providing a quantitative and timely physical basis for classifying discharge intensity.

[0032] In one embodiment of the present application, a specific discharge traveling wave data acquisition solution is provided. In S10, that is, obtaining traveling wave data of at least one discharge traveling wave of a faulty phase of a transmission line where a discharge fault occurs, specifically includes the following steps S11-S12:

[0033] S11: When a discharge fault is detected on the transmission line, the fault phase of the transmission line is obtained.

[0034] S12: Collecting traveling wave data of at least one discharge traveling wave of the fault phase of the transmission line according to a preset sampling rate and a preset sampling duration.

[0035] In steps S11-S12, the transmission line is tested for discharge faults. When a discharge fault is detected, the three-phase traveling wave amplitudes are compared. The phase with the highest amplitude and the most distorted waveform is identified as the faulty phase. Traveling wave data is collected for each discharge traveling wave generated by the faulty phase at a preset sampling rate and duration. This data captures the entire discharge process and reflected waves, providing a comprehensive, high-precision quantitative basis for subsequent fault level assessment of transmission line discharge faults.

[0036] Optionally, the traveling wave data of each discharge traveling wave includes current traveling wave data and voltage traveling wave data. The current traveling wave is a high-frequency transient current pulse generated in the conductor at the moment of discharge, and the current traveling wave data reflects the time domain characteristics of charge transfer. The voltage traveling wave is a sudden change in the phase-to-phase voltage of a line pair caused by discharge, and the voltage traveling wave data reflects the propagation process of electric field energy.

[0037] Furthermore, a preset sampling rate and a preset sampling duration of the traveling wave data are set in advance according to the discharge characteristics, monitoring objectives and hardware limitations to ensure the integrity and validity of the traveling wave data, which is not specifically limited in this application.

[0038] S20: Determine the wave crest moment of each discharge traveling wave based on the traveling wave data.

[0039] In this step, the wave crest moment is the absolute time when the traveling wave reaches the detection point, which is the core parameter for evaluating the discharge intensity. Based on the current traveling wave data collected in the traveling wave data, the wave crest moment when each discharge traveling wave is generated can be calculated.

[0040] In one embodiment of the present application, a specific wave crest moment determination solution is provided. In S20, the wave crest moment of each discharge traveling wave is determined based on the traveling wave data, specifically including:

[0041] For any discharge traveling wave, the wave crest moment of the discharge traveling wave is determined based on the current traveling wave data through a wave crest detection algorithm.

[0042] In this embodiment, for any discharge traveling wave, the starting moment of the traveling wave signal, ie, the wave head moment, can be accurately located by using a wave head detection algorithm.

[0043] Optionally, in the relevant technical field, using a wave head detection algorithm to locate the wave head moment is a common technical means in this field. The wave head detection algorithm can adopt at least one of the following: wavelet transform modulus maximum algorithm, mathematical morphology gradient method and differential threshold valve.

[0044] S30: Determine the voltage initial phase angle of each discharge traveling wave based on the wave crest moment and the traveling wave data.

[0045] In this step, the voltage initial phase angle is the phase angle of the power-frequency voltage at the time of discharge. This initial phase angle directly reflects the instantaneous amplitude of the power-frequency voltage at that time. Each time a discharge traveling wave is generated, the initial phase angle of the fault phase voltage corresponding to the wave crest is calculated based on the voltage traveling wave data. By analyzing the distribution characteristics of the initial phase angle, the discharge intensity can be accurately determined.

[0046] In one embodiment of the present application, a specific voltage initial phase angle calculation scheme is provided. In S30, the voltage initial phase angle of each discharge traveling wave is determined based on the wave crest moment and the traveling wave data, specifically including the following steps S31-S32:

[0047] S31: For any discharge traveling wave, based on the voltage traveling wave data, determine the instantaneous voltage value of the discharge traveling wave at the wave head moment and the voltage traveling wave peak value.

[0048] S32: Determine the voltage initial phase angle of the discharge traveling wave based on the instantaneous voltage value and the voltage traveling wave peak value.

[0049] For steps S31-S32, for any discharge traveling wave, the instantaneous voltage value of the fault phase and the voltage traveling wave peak value at the wave head moment are read from the voltage traveling wave data, and then the voltage initial phase angle of the discharge traveling wave is calculated based on the voltage instantaneous value and the voltage traveling wave peak value. The voltage initial phase angle calculation formula is:

[0050]

[0051] Among them, θ is the initial phase angle of voltage; V t0 is the instantaneous value of voltage at the wave head moment; V peak is the peak value of the voltage traveling wave.

[0052] S40: Determine a fault level of a discharge fault of the transmission line based on at least one voltage initial phase angle.

[0053] In this step, the distribution of the initial voltage phase angle is closely related to the discharge intensity of the transmission current. Under different discharge stresses, the initial voltage phase angle of the fault phase will exhibit different distribution characteristics. By analyzing the distribution of at least one initial voltage phase angle and based on the correlation between the initial phase angle and discharge intensity, the discharge intensity of the fault phase of the transmission line can be quantitatively assessed. Based on the discharge intensity, the fault level of the discharge fault can be determined, accurately assessing the severity of the discharge fault.

[0054] In one embodiment of the present application, a specific discharge intensity determination solution is provided. In S40, the fault level of the discharge fault of the transmission line is determined based on at least one voltage initial phase angle, specifically including the following steps S41-S43:

[0055] S41: Match at least one voltage initial phase angle with a plurality of preset phase intervals to determine a target phase interval to which the at least one voltage initial phase angle belongs.

[0056] S42: Determine the discharge intensity of the fault phase of the transmission line based on the target phase interval and the preset discharge intensity mapping table.

[0057] S43: Determine the fault level of the discharge fault of the transmission line based on the discharge intensity and a preset fault level mapping table.

[0058] In steps S41-43, the power frequency cycle is pre-divided into multiple phase intervals based on the physical characteristics of discharge, with each phase interval corresponding to a discharge intensity. At least one initial voltage phase angle of the discharge traveling wave is matched with multiple preset phase intervals, and at least one initial voltage phase angle is classified into a target phase interval. Based on the matched target phase interval, the corresponding discharge intensity level is searched from a preset discharge intensity mapping table. The stage of transmission line defect development can then be determined based on the discharge intensity.

[0059] Optionally, multiple preset phase intervals include: the first phase interval: the initial phase angle is within ±90°±α, α is ±10°; the second phase interval: the initial phase angle is within ±90°±β, β is ±30°; the third phase interval: the initial phase angle is within ±90°±δ, δ is ±85°.

[0060] Furthermore, the preset discharge intensity mapping table includes a correspondence between discharge intensity and phase interval, and the preset discharge intensity mapping table includes:

[0061] L1 is a slight discharge intensity, corresponding to the first phase interval (i.e., the initial phase angle is within ±90°±α, α is ±10°);

[0062] L2 medium discharge intensity: corresponds to the second phase range (i.e. the initial phase angle is within ±90°±β, β is ±30°);

[0063] L3 severe discharge intensity: corresponds to the third phase interval (i.e. the initial phase angle is within ±90°±δ, δ is ±85°).

[0064] Based on the correspondence between phase intervals and discharge intensities, a preset discharge intensity mapping table is constructed to identify the intensity of transmission line discharge faults. Based on the intensity identification results, equipment safety hazards can be graded. Specifically, when a mild discharge intensity is detected, the transmission line is in the initial discharge stage; when a moderate discharge intensity is detected, the transmission line is in the intensified discharge stage, during which the defect discharge is more severe and the equipment may break down; when a severe discharge intensity is detected, the transmission line has broken down and a ground fault has occurred. By identifying the discharge intensity of the transmission line, the development stage of the transmission line discharge fault can be determined, and then, based on the development stage, materials and operation and maintenance personnel can be allocated in a targeted manner to improve the reliability and stability of the power grid.

[0065] Furthermore, based on a mapping table of discharge intensity and preset fault levels, the fault level of the transmission line discharge fault is determined to determine the severity of the discharge fault. The development of transmission line discharge faults can be divided into several typical levels, each corresponding to a different discharge intensity. Based on the monitored discharge intensity, it is associated with each pre-set fault level to determine the fault stage of the transmission line discharge fault, thereby refining the fault level of the discharge fault.

[0066] Optionally, a mild discharge intensity corresponds to the first fault level in the initial stage, where the discharge intensity is relatively weak. This may be caused by minor contamination on the transmission line surface, partial aging of the insulation material, or other factors leading to partial discharge. A moderate discharge intensity corresponds to the second fault level in the aggravated stage, where the discharge phenomenon gradually intensifies and the discharge intensity increases over time. This may be because the initial problems were not promptly addressed, leading to further degradation of insulation performance. A severe discharge intensity corresponds to the third fault level in the severe stage. When the discharge intensity reaches a high level, such as a discharge current exceeding several hundred microamperes or even reaching the milliampere level, it indicates that the discharge fault has developed to a more serious level. This may result in noticeable discharge sparks, strong corona, and even insulation breakdown, leading to serious accidents such as transmission line tripping.

[0067] In one embodiment of the present application, a specific phase interval allocation scheme is provided. In S41, at least one voltage initial phase angle is matched with multiple preset phase intervals to determine a target phase interval to which the at least one voltage initial phase angle belongs. The scheme specifically includes the following steps S411-S42:

[0068] S411: When at least one voltage initial phase angle is single, match the voltage initial phase angle with a plurality of preset phase intervals to determine a target phase interval to which the voltage initial phase angle belongs.

[0069] In this step, when there is only a single initial voltage phase angle, the initial voltage phase angle is allocated to the corresponding target phase interval.

[0070] S412: When there are multiple initial voltage phase angles, determine the phase interval to which each initial voltage phase angle belongs. If multiple initial voltage phase angles are within multiple phase intervals, obtain the number of initial voltage phase angles corresponding to each phase interval, and take the phase interval with the largest number of initial voltage phase angles as the target phase interval.

[0071] In this step, if there are multiple initial voltage phase angles, each initial voltage phase angle is assigned to a corresponding phase interval. All initial voltage phase angles are traversed, and the number of initial voltage phase angles in each phase interval is counted. The phase interval with the largest number of initial voltage phase angles is ultimately selected as the target phase interval. If multiple phase intervals have the same number of initial voltage phase angles, the phase interval with the higher risk is prioritized.

[0072] In the above method, by statistically analyzing the initial phase angle distribution, the most frequently occurring phase interval is determined, the dominant discharge intensity is identified, and the false positive rate and missed detection rate are effectively reduced.

[0073] In one embodiment of the present application, a specific alarm prompting solution is provided. After S40, that is, after determining the discharge intensity of the fault phase of the transmission line based on at least one voltage initial phase angle, the following steps are also included:

[0074] Generate discharge fault warning information based on discharge intensity and fault level;

[0075] Send the alarm prompt information to the terminal of the operation and maintenance personnel.

[0076] In this embodiment, an alarm prompt message is generated based on the discharge intensity and the fault level of the discharge fault, and the alarm prompt message is sent to the operation and maintenance personnel terminal. This allows the operation and maintenance personnel to quickly understand the severity of the discharge fault based on the received alarm prompt message, which helps the operation and maintenance personnel to quickly respond to and handle the fault. Discharge faults are graded and handled according to the discharge intensity and fault level, which enables the rational allocation of operation and maintenance resources. For example, for potential discharges with low discharge intensity and in the initial stage, regular inspections and monitoring can be arranged; while for potential discharges with high discharge intensity that may cause serious faults at any time, professional personnel are promptly arranged to conduct detailed inspections and emergency repairs. This avoids the use of the same treatment method for all potential discharges, resulting in waste or insufficient resources, and improves the utilization efficiency of operation and maintenance resources.

[0077] As can be seen, in the above scheme, when a discharge fault is detected on a transmission line, the moment of the discharge traveling wave's crest is determined based on the detected traveling wave data. The initial voltage phase angle of the faulted phase at the moment of the traveling wave's crest is then calculated. The distribution of the initial voltage phase angle is analyzed to determine the discharge intensity of the faulted phase of the transmission line. This allows the discharge fault's severity to be accurately determined based on the discharge intensity. This allows operations and maintenance personnel to take effective measures based on the severity of the fault, improving the rationality of the deployment of repair personnel and the allocation of supplies.

[0078] In one embodiment, a device for determining the discharge fault level of a power transmission line is provided. The device for determining the discharge fault level of a power transmission line corresponds one-to-one to the method for determining the discharge fault level of a power transmission line in the above embodiment. Figure 2 As shown, the transmission line discharge fault level determination device 100 includes: an acquisition module 101, a first determination module 102, a second determination module 103 and a third determination module 104. The functional modules are described in detail as follows:

[0079] An acquisition module 101 is configured to acquire traveling wave data of at least one discharge traveling wave of a faulty phase of a transmission line where a discharge fault occurs;

[0080] A first determining module 102 is configured to determine the wave crest moment of each discharge traveling wave based on the traveling wave data;

[0081] The second determining module 103 is used to determine the voltage initial phase angle of each discharge traveling wave based on the wave crest moment and the traveling wave data;

[0082] The third determining module 104 is configured to determine a fault level of a discharge fault of the transmission line based on at least one voltage initial phase angle.

[0083] In one embodiment, the acquisition module 101 is specifically configured to:

[0084] When a discharge fault is detected on the transmission line, the fault phase of the transmission line is obtained;

[0085] Collecting traveling wave data of at least one discharge traveling wave of a fault phase of a transmission line according to a preset sampling rate and a preset sampling duration;

[0086] The traveling wave data includes current traveling wave data and voltage traveling wave data.

[0087] In one embodiment, the first determining module 102 is specifically configured to:

[0088] For any discharge traveling wave, the wave crest moment of the discharge traveling wave is determined based on the current traveling wave data through a wave crest detection algorithm.

[0089] In one embodiment, the second determining module 103 is specifically configured to:

[0090] For any discharge traveling wave, based on the voltage traveling wave data, determine the instantaneous voltage value of the discharge traveling wave at the wave head moment and the voltage traveling wave peak value;

[0091] The voltage initial phase angle of the discharge traveling wave is determined based on the instantaneous voltage value and the voltage traveling wave peak value.

[0092] In one embodiment, the third determining module 104 is specifically configured to:

[0093] Matching at least one voltage initial phase angle with a plurality of preset phase intervals to determine a target phase interval to which the at least one voltage initial phase angle belongs;

[0094] Determining the discharge intensity of the fault phase of the transmission line based on the target phase interval and a preset discharge intensity mapping table, wherein the preset discharge intensity mapping table includes a correspondence between discharge intensity and phase interval;

[0095] The fault level of the discharge fault of the power transmission line is determined based on the discharge intensity and a preset fault level mapping table, wherein the preset fault level mapping table includes a correspondence between the discharge intensity and the fault level.

[0096] In one embodiment, the third determining module 104 is further configured to:

[0097] In the case where at least one voltage initial phase angle is single, matching the voltage initial phase angle with a plurality of preset phase intervals to determine a target phase interval to which the voltage initial phase angle belongs;

[0098] When there are multiple initial voltage phase angles, determine the phase interval to which each initial voltage phase angle belongs. If multiple initial voltage phase angles are within multiple phase intervals, obtain the number of initial voltage phase angles corresponding to each phase interval, and take the phase interval with the largest number of initial voltage phase angles as the target phase interval.

[0099] In one embodiment, the apparatus further comprises:

[0100] A generation module, used to generate alarm prompt information of discharge fault based on discharge intensity and fault level;

[0101] The sending module is used to send alarm prompt information to the terminal of the operation and maintenance personnel.

[0102] The present invention provides a device for determining the level of a discharge fault in a transmission line. Upon detecting a discharge fault in a transmission line, the device determines the peak moment of the discharge traveling wave based on the detected traveling wave data. The device then calculates the initial voltage phase angle of the faulted phase at the peak moment. The device analyzes the distribution of the initial voltage phase angles to determine the discharge intensity of the faulted phase of the transmission line. This allows the device to accurately determine the level of the discharge fault based on the discharge intensity, thereby determining the severity of the discharge fault. This allows maintenance personnel to take effective measures based on the severity of the fault, improving the efficiency of deploying repair personnel and allocating supplies.

[0103] The specific definitions of the device for determining the level of a power transmission line discharge fault can be found in the definitions of the method for determining the level of a power transmission line discharge fault above and will not be further elaborated here. Each module within the device for determining the level of a power transmission line discharge fault can be implemented in whole or in part via software, hardware, or a combination thereof. Each of these modules can be embedded in or independent of a processor within an electronic device in hardware form, or stored in memory within the electronic device in software form, allowing the processor to invoke and execute the corresponding operations of each module.

[0104] In one embodiment, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the following steps are performed:

[0105] Acquiring traveling wave data of at least one discharge traveling wave of a faulty phase of a transmission line where a discharge fault occurs;

[0106] Based on the traveling wave data, determine the wave crest moment of each discharge traveling wave;

[0107] Determine the voltage initial phase angle of each discharge traveling wave based on the wave front moment and traveling wave data;

[0108] A fault level of a discharge fault of the power transmission line is determined based on at least one voltage initial phase angle.

[0109] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0110] Acquiring traveling wave data of at least one discharge traveling wave of a faulty phase of a transmission line where a discharge fault occurs;

[0111] Based on the traveling wave data, determine the wave crest moment of each discharge traveling wave;

[0112] Determine the voltage initial phase angle of each discharge traveling wave based on the wave front moment and traveling wave data;

[0113] A fault level of a discharge fault of the power transmission line is determined based on at least one voltage initial phase angle.

[0114] It should be noted that the above functions or steps that can be implemented by the computer-readable storage medium or electronic device can be referred to the relevant descriptions on the server side and the client side in the aforementioned method embodiment. To avoid repetition, they will not be described one by one here.

[0115] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0116] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0117] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A method for determining the discharge fault level of a transmission line, characterized in that: include: Acquiring traveling wave data of at least one discharge traveling wave of a faulty phase of a transmission line where a discharge fault occurs; Determining the wave crest moment of each discharge traveling wave based on the traveling wave data; Determining the voltage initial phase angle of each discharge traveling wave based on the wave crest moment and the traveling wave data; Based on at least one voltage initial phase angle, a fault level of the discharge fault of the transmission line is determined.

2. The method according to claim 1, characterized in that The step of obtaining traveling wave data of at least one discharge traveling wave of a faulty phase of a transmission line where a discharge fault occurs specifically includes: When a discharge fault is detected on the transmission line, obtaining the fault phase of the transmission line; Collecting traveling wave data of at least one discharge traveling wave of the fault phase of the transmission line according to a preset sampling rate and a preset sampling time; The traveling wave data includes current traveling wave data and voltage traveling wave data.

3. The method according to claim 2, characterized in that The step of determining the wave crest moment of each discharge traveling wave based on the traveling wave data specifically includes: For any discharge traveling wave, the wave crest moment of the discharge traveling wave is determined based on the current traveling wave data and through a wave crest detection algorithm.

4. The method according to claim 2, characterized in that The step of determining the voltage initial phase angle of each discharge traveling wave based on the wave crest moment and the traveling wave data specifically includes: For any discharge traveling wave, based on the voltage traveling wave data, determine the instantaneous voltage value of the discharge traveling wave at the wave head moment and the voltage traveling wave peak value; Based on the instantaneous voltage value and the peak value of the voltage traveling wave, the voltage initial phase angle of the discharge traveling wave is determined.

5. The method according to claim 1, wherein The step of determining the fault level of the discharge fault of the transmission line based on at least one voltage initial phase angle specifically includes: Matching the at least one voltage initial phase angle with a plurality of preset phase intervals to determine a target phase interval to which the at least one voltage initial phase angle belongs; determining the discharge intensity of the faulty phase of the transmission line based on the target phase interval and a preset discharge intensity mapping table, wherein the preset discharge intensity mapping table includes a correspondence between discharge intensity and phase interval; The fault level of the discharge fault of the power transmission line is determined based on the discharge intensity and a preset fault level mapping table, wherein the preset fault level mapping table includes a correspondence between discharge intensity and fault level.

6. The method according to claim 5, characterized in that The step of matching the at least one voltage initial phase angle with a plurality of preset phase intervals to determine a target phase interval to which the at least one voltage initial phase angle belongs specifically includes: In the case where at least one voltage initial phase angle is single, matching the voltage initial phase angle with a plurality of preset phase intervals to determine a target phase interval to which the voltage initial phase angle belongs; When there are multiple initial voltage phase angles, determine the phase interval to which each initial voltage phase angle belongs. If multiple initial voltage phase angles are within multiple phase intervals, obtain the number of initial voltage phase angles corresponding to each phase interval, and take the phase interval with the largest number of initial voltage phase angles as the target phase interval.

7. The method according to any one of claims 1 to 6, characterized in that After determining the fault level of the discharge fault of the transmission line based on at least one voltage initial phase angle, the method further includes: generating alarm information of the discharge fault based on the discharge intensity and the fault level; The warning information is sent to the terminal of the operation and maintenance personnel.

8. A device for determining the discharge fault level of a transmission line, characterized in that: include: an acquisition module, configured to acquire traveling wave data of at least one discharge traveling wave of a faulty phase of a transmission line where a discharge fault occurs; A first determining module is used to determine the wave crest moment of each discharge traveling wave based on the traveling wave data; A second determining module is used to determine the voltage initial phase angle of each discharge traveling wave based on the wave crest moment and the traveling wave data; The third determination module determines a fault level of the discharge fault of the transmission line based on at least one voltage initial phase angle.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method for determining the discharge fault level of a power transmission line according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the discharge fault level of a power transmission line according to any one of claims 1 to 7 are implemented.

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