A power distribution network hidden danger discharge risk test method and device, electronic equipment and medium

Abstract

The application discloses a power distribution network hidden danger discharge risk test method and device, electronic equipment and medium. The method comprises the following steps: acquiring a high-frequency traveling wave signal collected by a primary and secondary fusion switch; identifying and extracting a hidden danger discharge traveling wave signal from the high-frequency traveling wave signal; determining a hidden danger discharge risk grade of the hidden danger discharge traveling wave signal; and performing graded protection processing on the power distribution line according to the hidden danger discharge risk grade. The scheme realizes monitoring of hidden danger discharge of the power distribution network, performs risk test on the hidden danger discharge, and timely and quickly disposes the hidden danger discharge of the power distribution line.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of power distribution network fault, and particularly relates to a power distribution network hidden danger discharge risk test method and device, electronic equipment and medium. BACKGROUND

[0002] The power distribution network is an important component of the power system, and its power supply reliability is closely related to the safety production and life of users. The power distribution network has complex line structure, and there are overhead lines, cables, mixed lines and other forms. The power distribution network has many branch points, a wide range and long lines, and has poor operating conditions, and is prone to ground fault and short circuit fault. According to statistics, the annual power loss in China is more than 100 billion yuan, and more than 90% of power outages are caused by power distribution line faults. Improving the fault diagnosis and processing capability of the power distribution network is an effective way to ensure the power supply reliability of the power distribution network, shorten the power outage time and improve the user's power experience. At present, the power distribution network fault diagnosis mainly focuses on fault line selection, positioning and distance measurement, and the early hidden danger discharge diagnosis and early warning mechanism are still in the initial stage. With the increasing requirements for the power supply reliability and safety of the power distribution network, the demand for "early warning" instead of "post-diagnosis" of the power distribution network fault disposal is becoming more and more intense.

[0003] Due to the complex and changeable scene of the power distribution network, the power distribution network may go through multiple transient faults before the ground fault and short circuit fault occurs, such as arc discharge, flashover, insulation breakdown and other phenomena caused by factors such as super-high trees or insulator contamination. This phenomenon can be referred to as hidden discharge of the power distribution network equipment. This hidden discharge is an "abnormal" state between normal operation and line fault. If the hidden point is in this state for a long time, it will further deteriorate and eventually form a serious fault. At the same time, this hidden danger is often hidden and difficult to find during line inspection, and it is also easy to cause personal accidents if it is not treated for a long time. Therefore, the hidden discharge brings a series of severe challenges to the high-quality power supply level and fault warning of the power distribution network. At present, due to the weak characteristics of the hidden discharge, the existing fault detection and positioning technology still needs manual line inspection for investigation because it lacks early diagnosis of the entire defect deterioration development process. SUMMARY

[0004] The present application provides a power distribution network hidden discharge risk test method, device, electronic equipment and medium to realize the monitoring of the hidden discharge of the power distribution network, the risk test of the hidden discharge, and the rapid disposal of the hidden discharge of the power distribution line in time.

[0005] To achieve the above purpose, in a first aspect, the embodiment of the present application provides a power distribution network hidden discharge risk test method, which comprises:

[0006] Obtaining a high-frequency traveling wave signal collected by a primary and secondary fusion switch;

[0007] identify a hidden discharge traveling wave signal from the high-frequency traveling wave signal;

[0008] determine a hidden discharge risk level of the hidden discharge traveling wave signal;

[0009] perform a graded protection processing on the distribution line according to the hidden discharge risk level.

[0010] Optionally, identifying a hidden discharge traveling wave signal from the high-frequency traveling wave signal comprises:

[0011] excluding an interference signal from the high-frequency traveling wave signal to obtain a transient traveling wave signal;

[0012] extracting a hidden discharge traveling wave signal from the transient traveling wave signal.

[0013] Optionally, excluding an interference signal from the high-frequency traveling wave signal to obtain a transient traveling wave signal comprises:

[0014] segmenting the high-frequency traveling wave signal into multiple traveling wave waveforms based on a threshold triggering mode;

[0015] judging a waveform feature within a wave front time of each of the traveling wave waveforms;

[0016] when the waveform feature is a first waveform feature, excluding an interference signal corresponding to the traveling wave waveform; and when the waveform feature is a second waveform feature, retaining a transient traveling wave signal corresponding to the traveling wave waveform.

[0017] Optionally, extracting a hidden discharge traveling wave signal from the transient traveling wave signal comprises:

[0018] obtaining a power frequency signal of a distribution network;

[0019] determining a peak time sequence according to the power frequency signal of the distribution network;

[0020] judging whether a peak feature value in each of the traveling wave waveforms in the transient traveling wave signal is within the peak time sequence;

[0021] extracting each peak feature value in each of the traveling wave waveforms in the transient traveling wave signal as each peak time of each peak time sequence, each traveling wave waveform in which is a hidden discharge traveling wave waveform; wherein the hidden discharge traveling wave signal is composed of each of the hidden discharge traveling wave waveforms.

[0022] Optionally, the method further comprises: setting different hidden discharge risk levels;

[0023] setting different hidden discharge risk levels comprises:

[0024] setting different discharge density levels according to a number of hidden discharge traveling wave waveforms;

[0025] Different discharge average intensity levels are set according to peak value characteristics of each hidden discharge traveling wave form;

[0026] Different hidden discharge risk levels are determined according to different discharge density levels and different discharge average intensity levels.

[0027] Optionally, the hidden discharge risk level measurement of the hidden discharge traveling wave signal comprises:

[0028] The current discharge density level is determined according to the number of the current hidden discharge traveling wave forms;

[0029] The current discharge average intensity level is determined according to the peak value characteristics of each current hidden discharge traveling wave form; and the current hidden discharge risk level is determined according to the current discharge density level and the current discharge average intensity level.

[0030] Optionally, the peak value characteristic value in each traveling wave form is a time corresponding to a peak value in each traveling wave form.

[0031] In a second aspect, an embodiment of the present application further provides a power distribution network hidden discharge risk testing device, which comprises:

[0032] An acquisition module is configured to acquire high-frequency traveling wave signals collected by a primary and secondary fusion switch;

[0033] An extraction module is configured to identify and extract hidden discharge traveling wave signals from the high-frequency traveling wave signals;

[0034] A level measurement module is configured to measure a hidden discharge risk level of the hidden discharge traveling wave signals;

[0035] A protection processing module is configured to perform protection processing on a power distribution line according to the hidden discharge risk level.

[0036] In a third aspect, an embodiment of the present application further provides an electronic device, which comprises:

[0037] at least one processor; and

[0038] a memory communicatively connected to the at least one processor; wherein

[0039] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the power distribution network hidden discharge risk testing method of the first aspect.

[0040] In a fourth aspect, the embodiment of the present application further provides a computer readable storage medium, which stores computer instructions for causing a processor to execute the power distribution network hidden discharge risk testing method in the first aspect.

[0041] In the embodiment of the present application, the high-frequency traveling wave signal collected by the primary and secondary fusion switch is acquired, the hidden discharge traveling wave signal is extracted from the high-frequency traveling wave signal, the hidden discharge risk level of the hidden discharge traveling wave signal is determined, and the power distribution line is protected and processed according to the hidden discharge risk level, so that the monitoring of the hidden discharge of the power distribution network is realized, the risk test of the hidden discharge is performed, and the hidden discharge of the power distribution line is quickly disposed in time, so that the hidden discharge point is prevented from further deteriorating and finally forming a serious fault. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a flowchart of the power distribution network hidden discharge risk testing method provided by the embodiment of the present application;

[0043] Figure 2 is a flowchart of the power distribution network hidden discharge risk testing method provided by the embodiment of the present application;

[0044] Figure 3 is a different hidden discharge risk level diagram determined by the embodiment of the present application according to different discharge density levels and different discharge average intensity levels;

[0045] Figure 4 is a structural schematic diagram of the power distribution network hidden discharge risk testing device provided by the embodiment of the present application;

[0046] Figure 5 is a structural schematic diagram of an electronic device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0047] The present application will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0048] Figure 1 is a flowchart of the power distribution network hidden discharge risk testing method provided by the embodiment of the present application, and the embodiment can be applicable to monitoring the hidden discharge point in the power distribution line. The method can be executed by the power distribution network hidden discharge risk testing device, as shown in Figure 1 , the method specifically includes the following steps:

[0049] S110, acquiring the high-frequency traveling wave signal collected by the primary and secondary fusion switch;

[0050] The primary-secondary fusion switch is a switch that connects the primary circuit and the secondary circuit of the power distribution network on the same switch. The primary circuit is a circuit in the high-voltage power system, and the voltage is generally above 10 kV. The secondary circuit is a circuit in the low-voltage power distribution system, and the voltage is below 1 kV. The primary-secondary fusion switch actually combines two switches into one, which can control the on-off and interlocking operation of the two circuits. The primary-secondary fusion switch can collect high-frequency traveling wave signals in the power distribution line through its wideband sensor. The high-frequency traveling wave signal is a high-frequency traveling wave current signal or a high-frequency traveling wave voltage signal propagating in the power distribution line.

[0051] S120, identifying and extracting a hidden discharge traveling wave signal from the high-frequency traveling wave signal;

[0052] When an abnormal point with weak insulation appears in the power distribution line, it is easy to cause a breakdown of the insulation gap, thereby generating a primary hidden discharge traveling wave signal. The embodiment can identify and extract a hidden discharge traveling wave signal from the high-frequency traveling wave signal, so as to determine the abnormal point with weak insulation in the power distribution line, thereby monitoring and positioning the abnormal point with weak insulation in the power distribution line, and avoiding the abnormal point with weak insulation from causing hidden discharge, thereby further deteriorating and eventually forming a serious fault.

[0053] S130, determining the risk level of hidden discharge for the hidden discharge traveling wave signal;

[0054] The risk level of hidden discharge includes I-level hidden discharge risk level, II-level hidden discharge risk level, III-level hidden discharge risk level, and IV-level hidden discharge risk level. The I-level hidden discharge risk level is a serious hidden discharge abnormality. The II-level hidden discharge risk level is a relatively serious hidden discharge abnormality. The III-level hidden discharge risk level is a general hidden discharge abnormality. The IV-level hidden discharge risk level is a slight hidden discharge abnormality. The embodiment can determine the risk level of hidden discharge according to the signal characteristics of the hidden discharge traveling wave signal, thereby determining which level of hidden discharge risk level the hidden discharge traveling wave signal belongs to.

[0055] S140, performing hierarchical protection processing on the power distribution line according to the risk level of hidden discharge.

[0056] Wherein, the embodiment can perform different grading protection processing on the distribution line according to different hidden discharge risk levels, thereby guiding the operation and maintenance personnel to reasonably dispose; specifically, when the current hidden discharge risk level is the I-level hidden discharge risk level, a closing instruction can be sent to the primary and secondary fusion switch on the distribution line at the corresponding position, thereby timely removing the fault to avoid further serious accidents. When the current hidden discharge risk level is the II-level hidden discharge risk level, the operation and maintenance personnel can be informed and the fault defect can be eliminated within 1-2 hours; when the current hidden discharge risk level is the III-level hidden discharge risk level, the artificial line patrol of such hidden discharge is generally difficult to patrol, and instruments such as ultraviolet instruments can be carried to accurately monitor the discharge position. When the current hidden discharge risk level is the IV-level hidden discharge risk level, such situation can be continuously observed, and the terminal maintenance hidden discharge electric insulator, hardware and the like are maintained during regular maintenance.

[0057] In the embodiment of the application, the high-frequency traveling wave signal collected by the primary and secondary fusion switch is acquired, the hidden discharge traveling wave signal is extracted from the high-frequency traveling wave signal, the hidden discharge risk level is determined for the hidden discharge traveling wave signal, and the distribution line is protected according to the hidden discharge risk level, so that the monitoring of the hidden discharge of the distribution network is realized, the risk test of the hidden discharge is performed, the hidden discharge of the distribution line is quickly disposed in time, and the further deterioration of the hidden discharge point is avoided to form a serious fault.

[0058] Optionally, step S120 is further refined based on the above embodiment, Figure 2 is a flow chart of a hidden discharge risk test method of a distribution network provided by the embodiment of the application, as shown in the figure, the method comprises the following steps: Figure 2

[0059] S210, acquiring a high-frequency traveling wave signal collected by a primary and secondary fusion switch;

[0060] S220, excluding interference signals from the high-frequency traveling wave signal to obtain a transient traveling wave signal;

[0061] Specifically, excluding the interference signals from the high-frequency traveling wave signal to obtain the transient traveling wave signal comprises: dividing the high-frequency traveling wave signal into a plurality of traveling wave waveforms based on a threshold trigger mode; judging the waveform features in the wavefront time of each traveling wave waveform; when the waveform feature is a first waveform feature, the interference signal formed by the corresponding traveling wave waveform is excluded; and when the waveform feature is a second waveform feature, the transient traveling wave signal formed by the corresponding traveling wave waveform is retained.

[0062] ​The threshold triggering mode is to detect the current or voltage amplitude in the high-frequency traveling wave signal in real time, and when the current or voltage amplitude is greater than a preset value, sampling can be triggered; a complete period of traveling wave waveform is formed by taking the data 600us before the trigger point and 600us after the trigger point after triggering sampling; it can be understood that multiple complete period traveling wave waveforms can be collected from the high-frequency traveling wave signal;

[0063] The waveform feature in the wave front time of the traveling wave waveform is a waveform gentle feature before the peak value of the traveling wave waveform; when the waveform feature is the first waveform feature, the first waveform feature is that the waveform before the peak value of the traveling wave waveform is not gentle, the corresponding traveling wave waveform is excluded; if the type of traveling wave waveform includes multiple, multiple corresponding traveling wave waveforms are excluded; the traveling wave waveform of this type can form an interference signal, that is, the interference signal is excluded;

[0064] When the waveform feature is the second waveform feature, the second waveform feature is that the waveform before the peak value of the traveling wave waveform is gentle, the corresponding traveling wave waveform is retained; if the type of traveling wave waveform includes multiple, multiple corresponding traveling wave waveforms are retained; the traveling wave waveform of this type can form a transient traveling wave signal, that is, the transient traveling wave signal is retained;

[0065] More specifically, a certain period of traveling wave current waveform is selected, the amplitude of the traveling wave current in the period is I max , the sampling rate is f, the unit is Hz, then all sampling points are n T =T·f, form an array I T ={I1, I2,...I n}, generally T is 300;

[0066] If the number n of units in the array I T satisfying the condition I T ≤0.2I max is greater than 95% of the total number in the array, it is considered that the waveform feature of the traveling wave waveform is the second waveform feature; if the number n of units in the array I T satisfying the condition I T >0.2I max is greater than 95% of the total number in the array, it is considered that the waveform feature of the traveling wave waveform is the first waveform feature.

[0067] S230, extracting a hidden discharge traveling wave signal from the transient traveling wave signal.

[0068] Specifically, the hidden discharge traveling wave signal is extracted from the transient traveling wave signal, including: obtaining a power grid power frequency signal; determining a peak time sequence according to the power grid power frequency signal; determining whether each peak characteristic value in each traveling wave waveform in the transient traveling wave signal is within the peak time sequence; extracting each traveling wave waveform in which each peak characteristic value in each traveling wave waveform in the transient traveling wave signal is within each peak time in the peak time sequence as each hidden discharge traveling wave waveform; wherein the hidden discharge traveling wave signal is composed of each hidden discharge traveling wave waveform.

[0069] The power grid power frequency signal is a 50Hz power supply signal of the power grid, which can be a power frequency voltage signal or a power frequency current signal; the frequency of the power frequency signal is less than the frequency of the high-frequency traveling wave signal. The peak time sequence is determined according to the power grid power frequency signal, i.e., each time point corresponding to each power frequency signal peak value is determined.

[0070] The peak characteristic value in each traveling wave waveform is a time characteristic corresponding to the peak value in each traveling wave waveform; each traveling wave waveform in which each peak characteristic value in each traveling wave waveform in the transient traveling wave signal is within each peak time in the peak time sequence is extracted as each hidden discharge traveling wave waveform; since each peak time in the peak time sequence is periodic, each hidden discharge traveling wave waveform is also periodic; a hidden discharge traveling wave signal can be formed from the periodic hidden discharge traveling wave waveform. If each hidden discharge traveling wave waveform is non-periodic, a hidden discharge traveling wave signal is not formed. Or if each peak characteristic value in each traveling wave waveform in the transient traveling wave signal is not the same as each peak time in the peak time sequence, a hidden discharge traveling wave signal is not formed.

[0071] As can be easily understood, at each peak time in the peak time sequence, the amplitude of the power frequency signal is large, and it is extremely easy to occur discharge phenomenon, at this time, the peak characteristic value in each traveling wave waveform in the transient traveling wave signal is the same as each peak time in the peak time sequence; of course, in some embodiments, the peak characteristic value in each traveling wave waveform in the transient traveling wave signal is allowed to have a certain deviation value from each peak time in the peak time sequence.

[0072] S240, setting different hidden discharge risk levels;

[0073] The setting of different hidden discharge risk levels includes: setting different discharge density levels according to the number of hidden discharge traveling wave waveforms; setting different discharge average intensity levels according to the peak characteristics of each hidden discharge traveling wave waveform. The different hidden discharge risk levels are determined according to the different discharge density levels and the different discharge average intensity levels.

[0074] The discharge density level refers to the number of discharge waveforms of the hidden discharge in the power distribution line within a certain time; the discharge density level is affected by different types of hidden discharge points, or weather, temperature and other factors. The peak value characteristic of each hidden discharge wave waveform is the current peak value amplitude or voltage peak value amplitude of each hidden discharge wave waveform. The average discharge intensity is the average value of the current peak value amplitude of each hidden discharge wave waveform.

[0075] For example, different discharge density levels are set according to the number of hidden discharge waveforms, that is, different discharge density levels are f d1 , f d2 , f d3； If one hour is taken as a unit of time, the discharge density level is f d1 , that is, 0-30 discharges per unit time are considered to be sparse discharges; f d2 , that is, 30-200 discharges per unit time are considered to be a small amount of discharges, f d3 , that is, 200-3000 discharges per unit time are considered to be a large amount of discharges; and when the number of discharges per unit time is greater than 3000, it is considered to be severe discharge.

[0076] Different average discharge intensity levels are set according to the peak value characteristic of each hidden discharge wave waveform; different discharge intensity levels are E p1 , E p2 , E p3 If one hour is taken as a unit of time, the average discharge intensity level is E p1 , that is, the average discharge intensity within a unit of time is between 0 and 0.003, which is considered to be weak discharge; E p2 , that is, the average discharge intensity within a unit of time is between 0.003 and 0.3, which is considered to be slight discharge; E p3 , that is, the average discharge intensity within a unit of time is between 0.3 and 50, which is considered to be relatively strong discharge; and when the average discharge intensity within a unit of time is greater than 50, it is considered to be strong discharge.

[0077] Figure 3 The different hidden discharge risk levels are determined by the different discharge density levels and the different average discharge intensity levels according to the embodiments of the present application; as shown in FIG. 1, according to the different discharge density levels and the different average discharge intensity levels, four levels of hidden discharge risk levels I, II, III and VI can be determined. Figure 3

[0078] S250, hidden discharge risk level determination is performed on the hidden discharge wave signal.

[0079] Specifically, refer to Figure 3 ​According to the number of current hidden discharge traveling wave waveforms, the current discharge density level is determined; according to the peak value characteristics of the current hidden discharge traveling wave waveforms, the current discharge average intensity level is determined; and according to the current discharge density level and the current discharge average intensity level, the current hidden discharge risk level is determined.

[0080] In S260, the power distribution line is subjected to graded protection processing according to the hidden discharge risk level.

[0081] The power distribution line can be subjected to different graded protection processing according to different hidden discharge risk levels, thereby guiding the operation and maintenance personnel to reasonably dispose;

[0082] In the embodiment, the hidden discharge traveling wave signal is further refined, and the standard for determining the hidden discharge risk level according to the discharge density level and the discharge intensity is added, so that the hidden discharge risk level of the hidden discharge traveling wave signal is determined, and the power distribution line is subjected to graded protection processing according to the hidden discharge risk level, thereby avoiding further deterioration of the hidden discharge point and finally forming a serious fault.

[0083] Based on the same inventive concept, the embodiment of the present application also provides a power distribution network hidden discharge risk testing device. The power distribution network hidden discharge risk testing device provided by the embodiment can execute the power distribution network hidden discharge risk testing method provided by any embodiment of the present application, and has the corresponding function modules and beneficial effects of the execution method. Figure 4 is a structural schematic diagram of a power distribution network hidden discharge risk testing device provided by an embodiment of the present application; as shown in Figure 4 The device comprises:

[0084] The acquisition module 10 is configured to acquire high-frequency traveling wave signals collected by a primary and secondary fusion switch.

[0085] The extraction module 20 is configured to extract hidden discharge traveling wave signals from the high-frequency traveling wave signals.

[0086] The level determination module 30 is configured to determine the hidden discharge risk level of the hidden discharge traveling wave signals.

[0087] The protection processing module 40 is configured to perform graded protection processing on the power distribution line according to the hidden discharge risk level.

[0088] Optionally, the extraction module 20 comprises:

[0089] The first extraction unit is configured to exclude interference signals from the high-frequency traveling wave signals to obtain transient traveling wave signals.

[0090] The second extraction unit is configured to extract hidden discharge traveling wave signals from the transient traveling wave signals.

[0091] Optionally, the first extraction unit, specifically:

[0092] The high-frequency traveling wave signal is segmented into multiple traveling wave waveforms based on a threshold triggering mode;

[0093] The waveform current characteristics within the wavefront time of each traveling wave waveform are determined;

[0094] When the waveform current characteristics are first waveform current characteristics, the interference signal corresponding to the traveling wave waveform is excluded; when the waveform current characteristics are second waveform current characteristics, the transient traveling wave signal corresponding to the traveling wave waveform is retained.

[0095] Optionally, the second extraction unit, specifically:

[0096] The power frequency signal of the power distribution network is obtained;

[0097] The peak time sequence is determined according to the power frequency signal of the power distribution network;

[0098] It is determined whether the peak characteristic value in each traveling wave waveform in the transient traveling wave signal is within the peak time sequence;

[0099] Each peak characteristic value in each traveling wave waveform in the transient traveling wave signal is extracted, and each peak time in the peak time sequence is determined as each hidden discharge traveling wave waveform; wherein the hidden discharge traveling wave signal is composed of each hidden discharge traveling wave waveform.

[0100] Optionally, the device further comprises a grade setting module for setting different hidden discharge risk grades;

[0101] The grade setting module, specifically:

[0102] Different discharge density grades are set according to the number of hidden discharge traveling wave waveforms;

[0103] Different discharge average intensity grades are set according to the peak characteristics of each hidden discharge traveling wave waveform.

[0104] Different hidden discharge risk grades are determined according to different discharge density grades and different discharge average intensity grades.

[0105] Optionally, the grade determination module 30, specifically:

[0106] The current discharge density grade is determined according to the number of current hidden discharge traveling wave waveforms;

[0107] The current discharge average intensity grade is determined according to the peak characteristics of each current hidden discharge traveling wave waveform; the current hidden discharge risk grade is determined according to the current discharge density grade and the current discharge average intensity grade.

[0108] Optionally, the peak characteristic value in each of the traveling wave waveforms is a current peak value corresponding time in each of the waveform signals.

[0109] Figure 5 is a structural schematic diagram of an electronic device provided by an embodiment of the application, as Figure 5 shown, the device includes a processor 70, a memory 71, an input device 72, and an output device 73; the number of processors 70 in the device can be one or more, Figure 5 one processor 70 is taken as an example; the processor 70, the memory 71, the input device 72, and the output device 73 in the device can be connected through a bus or other means, Figure 5 and the connection through the bus is taken as an example.

[0110] The memory 71, as a kind of computer readable storage medium, can be used to store software programs, computer executable programs and modules, such as the program instructions / modules corresponding to the power distribution network hidden discharge risk test method in the embodiment of the application. The processor 70 performs various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory 71, that is, the power distribution network hidden discharge risk test method described above is realized.

[0111] The memory 71 can mainly include a storage program area and a storage data area, wherein the storage program area can store an operating system, at least one application program required by a function; the storage data area can store data created according to the use of the terminal and the like. In addition, the memory 71 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state memory device. In some examples, the memory 71 can further include a memory remotely arranged with respect to the processor 70, and these remote memories can be connected to the device through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0112] The input device 72 can be used to receive input digital or character information, and generate key signal input related to user settings and function control of the device. The output device 73 can include a display device such as a display screen.

[0113] The embodiment of the application also provides a storage medium containing computer executable instructions, which are used to execute a power distribution network hidden discharge risk test method when executed by a computer processor, and the method comprises:

[0114] Obtaining a high-frequency traveling wave signal collected by a secondary fusion switch;

[0115] Identifying and extracting a hidden discharge traveling wave signal from the high-frequency traveling wave signal;

[0116] The hidden discharge risk level of the hidden discharge traveling wave signal is determined.

[0117] The power distribution line is graded and protected according to the hidden discharge risk level.

[0118] Of course, the storage medium provided by the embodiment of the present application includes computer executable instructions, which are not limited to the method operations described above, and can also perform related operations in the power distribution network hidden discharge risk test method provided by any embodiment of the present application.

[0119] Through the above description of the embodiments, those skilled in the art can clearly understand that the present application can be realized by means of software and necessary general hardware, and of course can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a floppy disk, a read-only memory (ROM), a random access memory (RAM), a FLASH, a hard disk or an optical disk, etc., including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in various embodiments of the present application.

[0120] It is worth noting that in the above embodiment of the search device, each unit and module included is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be realized; in addition, the specific name of each functional unit is only for easy mutual distinction, and does not limit the protection scope of the present application.

[0121] Note that the above is only the preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A method for testing the risk of hidden discharge in a power distribution network, characterized in that, The method comprises the following steps: obtaining high-frequency traveling wave signals collected by a secondary fusion switch; extracting hidden discharge traveling wave signals from the high-frequency traveling wave signals; wherein, the extraction of the hidden discharge traveling wave signals from the high-frequency traveling wave signals comprises the following steps: excluding interference signals from the high-frequency traveling wave signals to obtain transient traveling wave signals; extracting hidden discharge traveling wave signals from the transient traveling wave signals; wherein, the extraction of the hidden discharge traveling wave signals from the transient traveling wave signals comprises the following steps: obtaining power frequency signals of a power distribution network; determining a peak time sequence according to the power frequency signals of the power distribution network; judging whether the peak characteristic values in each of the traveling wave waveforms in the transient traveling wave signals are within the peak time sequence; extracting each peak characteristic value in each of the traveling wave waveforms in the transient traveling wave signals as each peak time of each peak characteristic value within the peak time sequence as each hidden discharge traveling wave waveform; wherein, the hidden discharge traveling wave signals are composed of each of the hidden discharge traveling wave waveforms; determining a hidden discharge risk level of the hidden discharge traveling wave signals; performing graded protection processing on the power distribution line according to the hidden discharge risk level.

2. The power distribution grid hidden hazard discharge risk testing method of claim 1, wherein, The method for excluding interference signals from the high-frequency traveling wave signals to obtain transient traveling wave signals comprises the following steps: dividing the high-frequency traveling wave signals into multiple traveling wave waveforms based on a threshold triggering mode; judging a waveform characteristic within a wave front time of each of the traveling wave waveforms; when the waveform characteristic is a first waveform characteristic, excluding interference signals corresponding to the traveling wave waveform; when the waveform characteristic is a second waveform characteristic, retaining transient traveling wave signals corresponding to the traveling wave waveform.

3. The method of claim 1, wherein, The method further comprises the following steps: setting different hidden discharge risk levels; setting different hidden discharge risk levels comprises the following steps: setting different discharge density levels according to the number of hidden discharge traveling wave waveforms; setting different discharge average intensity levels according to the peak characteristics of each of the hidden discharge traveling wave waveforms; determining different hidden discharge risk levels according to the different discharge density levels and the different discharge average intensity levels.

4. The power distribution grid hidden hazard discharge risk testing method of claim 3, wherein, The method for determining a hidden discharge risk level of the hidden discharge traveling wave signals comprises the following steps: determining a current discharge density level according to the number of current hidden discharge traveling wave waveforms; determining a current discharge average intensity level according to the peak characteristics of each of the current hidden discharge traveling wave waveforms; determining a current hidden discharge risk level according to the current discharge density level and the current discharge average intensity level.

5. The power distribution grid hidden hazard discharge risk testing method of claim 3, wherein, The peak characteristic value in each of the traveling wave waveforms is the time corresponding to the peak in each of the traveling wave waveforms.

6. A power distribution network hidden discharge risk testing device, characterized in that, The method comprises the following steps: an obtaining module, configured to obtain high-frequency traveling wave signals collected by a secondary fusion switch; an extracting module, configured to extract hidden discharge traveling wave signals from the high-frequency traveling wave signals; wherein, the extracting module comprises the following steps: a first extracting unit, configured to exclude interference signals from the high-frequency traveling wave signals to obtain transient traveling wave signals; a second extracting unit, configured to extract hidden discharge traveling wave signals from the transient traveling wave signals; wherein, the second extracting unit comprises the following steps: obtaining power frequency signals of a power distribution network; determining a peak time sequence according to the power frequency signals of the power distribution network; judging whether the peak characteristic values in each of the traveling wave waveforms in the transient traveling wave signals are within the peak time sequence; Each peak characteristic value in each of the peak value time sequence is a hidden discharge traveling wave waveform; wherein the hidden discharge traveling wave signal is composed of each of the hidden discharge traveling wave waveform; The grade determination module is configured to determine a hidden discharge risk grade of the hidden discharge traveling wave signal; The protection processing module is configured to perform a graded protection processing on the distribution line according to the hidden discharge risk grade.

7. An electronic device, comprising: The electronic device comprises: at least one processor; and a memory connected to the at least one processor in communication; wherein The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the power distribution network hidden discharge risk test method of any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions for enabling the processor to implement the power distribution network hidden discharge risk test method of any one of claims 1-5 when executed.

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