Partial discharge detection method, device, equipment and storage medium

Abstract

The present application is applicable to the field of data processing technology, and provides a partial discharge detection method, device, equipment and storage medium, the method comprising: obtaining multiple current waveforms of a target primary device; wherein the multiple current waveforms are current waveforms of the target primary device at the same time; for any current waveform, calculating the similarity between the current waveform and other current waveforms, and obtaining multiple first similarities; if the multiple first similarities are greater than or equal to a preset similarity threshold, then obtaining the partial discharge amount based on the multiple current waveforms. The present application can be used for detection at a detection site with large electrical interference, and the detection result is more accurate.

Description

Technical Field

[0001] The present application belongs to the field of data processing technology, and in particular, relates to a partial discharge detection method, device, equipment and storage medium. Background Art

[0002] The partial discharge and temperature monitoring device is an online monitoring device installed on the primary switchgear such as the ring network switchgear, cable branch box, box transformer, etc. in the power distribution network system. It is used to monitor partial discharge online, indicate short circuit and grounding fault of the corresponding cable section, and real-time temperature.

[0003] The pulse current method is a widely recognized and widely used method for testing partial discharge. The result is the apparent discharge in pC, which is a quantitative measurement and can objectively reflect the insulation status of electrical equipment. Among various switchgears, switchgears with voltage levels of 10kV and above have the largest number of installations and the most failures, and the consequences are also very serious.

[0004] However, the pulse current method has low measurement efficiency, narrow bandwidth, little information, and is susceptible to environmental interference. In an environment with strong electrical interference, the test results are inaccurate. Summary of the invention

[0005] The embodiments of the present application provide a partial discharge detection method, apparatus, device and storage medium to perform detection at a detection site with large electrical interference, and the detection results are more accurate.

[0006] This application is implemented through the following technical solutions:

[0007] In a first aspect, an embodiment of the present application provides a partial discharge detection method, comprising:

[0008] Acquire multiple current waveforms of a target primary device; wherein the multiple current waveforms are current waveforms of the target primary device at the same moment.

[0009] For any current waveform, the similarity between the current waveform and other current waveforms is calculated to obtain a plurality of first similarities.

[0010] If the plurality of first similarities are all greater than or equal to a preset similarity threshold, the partial discharge amount is obtained based on the plurality of current waveforms.

[0011] In combination with the first aspect, in some possible implementations, obtaining a partial discharge amount based on multiple current waveforms includes:

[0012] Based on the plurality of current waveforms, a target current waveform is calculated.

[0013] Based on the target current waveform, the partial discharge amount is obtained.

[0014] In combination with the first aspect, in some possible implementations, calculating a target current waveform based on multiple current waveforms includes:

[0015] A plurality of current waveforms are plotted in a first coordinate system, wherein the abscissa of the first coordinate system represents time and the ordinate represents current value.

[0016] The timing of any one of the plurality of current waveforms is used as the timing of the target current waveform.

[0017] For any moment of the target current waveform, the average of the current values ​​corresponding to the moment on multiple current waveforms is used as the current value corresponding to the moment of the target current waveform.

[0018] The target current waveform is obtained according to the time of the target current waveform and the current values ​​corresponding to different time of the target current waveform.

[0019] In combination with the first aspect, in some possible implementations, obtaining a partial discharge amount based on a target current waveform includes:

[0020] The target current waveform is converted into a target current based on the target current waveform and the first coordinate system.

[0021] The target voltage is calculated by multiplying the target current and the sense impedance.

[0022] The target voltage is amplified and displayed to obtain the partial discharge amount.

[0023] In combination with the first aspect, in some possible implementations, the similarity between the current waveform and other current waveforms is calculated to obtain multiple first similarities, including:

[0024] In combination with the first formula, the similarity between the current waveform and other current waveforms is calculated to obtain multiple first similarities.

[0025] The first formula is:

[0026]

[0027] Among them, C i represents the similarity between the current waveform and the current waveform i, x represents the number of moments in the current waveform, y x0 represents the current value of the current waveform at the xth moment, y xi Represents the current value of current waveform i at the xth moment.

[0028] In combination with the first aspect, in some possible implementations, the partial discharge detection method further includes:

[0029] If at least one first similarity among the multiple first similarities is smaller than a preset similarity threshold, multiple current waveforms of the target primary device are reacquired.

[0030] In combination with the first aspect, in some possible implementations, obtaining multiple current waveforms of a target primary device includes:

[0031] By using multiple current monitoring devices, the current of the target primary device is monitored simultaneously to obtain multiple groups of currents within the same time period.

[0032] Based on multiple groups of multiple currents in the same time period, multiple current waveforms are obtained.

[0033] In a second aspect, an embodiment of the present application provides a partial discharge detection device, comprising:

[0034] The data acquisition module is used to acquire multiple current waveforms of a target primary device; wherein the multiple current waveforms are current waveforms of the target primary device at the same moment.

[0035] The data calculation module is used to calculate the similarity between any current waveform and other current waveforms to obtain multiple first similarities.

[0036] The data output module is used to obtain the partial discharge amount based on the multiple current waveforms if the multiple first similarities are all greater than or equal to the preset similarity threshold.

[0037] In a third aspect, an embodiment of the present application provides a terminal device, including: a processor and a memory, the memory is used to store a computer program, and when the processor executes the computer program, it implements the partial discharge detection method as described in any one of the first aspects.

[0038] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the partial discharge detection method as described in any one of the first aspects is implemented.

[0039] It can be understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0040] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0041] The present application first obtains multiple current waveforms of the target primary equipment, and determines whether local discharge occurs by calculating and comparing the similarity of the current waveforms. When local discharge occurs, the similarity between the multiple current waveforms will be very high. If the current waveform is only disturbed and no local discharge occurs, the similarity between the multiple current waveforms will be very low. By determining whether local discharge occurs by similarity, it is possible to ensure detection at sites with large electrical interference. At the same time, the calculation of the local discharge amount based on multiple current waveforms is more accurate than directly calculating the local discharge amount.

[0042] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0044] Figure 1 It is a flow chart of a partial discharge detection method provided in one embodiment of the present application;

[0045] Figure 2 is a schematic diagram of multiple current waveforms provided by an embodiment of the present application;

[0046] Figure 3 is a structural schematic diagram of a partial discharge detection device provided in one embodiment of the present application;

[0047] Figure 4 It is a structural diagram of a terminal device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0048] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0049] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0050] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0051] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0052] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0053] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0054] Figure 1 is a schematic diagram of the process of a partial discharge detection method provided in an embodiment of the present application, referring to Figure 1 , the partial discharge detection method is described in detail as follows:

[0055] Step 101, obtaining multiple current waveforms of a target primary device; wherein the multiple current waveforms are current waveforms of the target primary device at the same moment.

[0056] Exemplarily, step 101 may include:

[0057] By using multiple current monitoring devices, the current of the target primary device is monitored simultaneously to obtain multiple groups of currents within the same time period.

[0058] Based on multiple groups of multiple currents in the same time period, multiple current waveforms are obtained.

[0059] In some specific embodiments, in order to identify whether the acquired current is disturbed, multiple currents in the same time period are converted into multiple current waveforms to facilitate subsequent elimination of interference and make the final partial discharge amount more accurate.

[0060] Step 102: For any current waveform, calculate the similarity between the current waveform and other current waveforms to obtain a plurality of first similarities.

[0061] Exemplarily, calculating the similarity between the current waveform and other current waveforms to obtain a plurality of first similarities may include:

[0062] The similarity between the current waveform and other current waveforms is calculated in combination with the first formula to obtain a plurality of first similarities.

[0063] The first formula can be:

[0064]

[0065] Among them, C i represents the similarity between the current waveform and the current waveform i, x represents the number of moments in the current waveform, y x0 represents the current value of the current waveform at the xth moment, y xi Represents the current value of current waveform i at the xth moment.

[0066] In some specific embodiments, by calculating the similarity between multiple current waveforms, it is possible to determine whether local discharge has occurred. When local discharge occurs, the similarity between multiple current waveforms should be very high, but if interference occurs, scattered situations with low similarity will occur. The calculation of the similarity can more accurately quantify whether local discharge has occurred.

[0067] In some specific embodiments, Figure 2As shown, S1 and S2 are two current waveforms. Assuming that S1 is the current waveform collected by device A, and assuming that S2 is the current waveform collected by device B, after calculation, the similarity between S1 and S2 is very high. There are many reasons for the spacing between L1, L2 and L3. It may be because there is a certain error between device A and device B, or one of the two devices is affected by interference, so that the overall value of the measured current deviates from that of the other device. A device may also be affected by interference and sometimes the interference may not occur (not shown in the figure). There is only a deviation between the two current values ​​at a certain position (or multiple positions). At this time, a certain degree of error can be eliminated through the subsequent calculation of the target current waveform.

[0068] When the interference is strong, it will affect the similarity between the two. If the gap is too large, no subsequent calculation will be performed, reducing the amount of calculation. The adaptive selection is more reasonable, and the partial discharge amount is calculated within the error range. In this way, the calculated partial discharge amount is more accurate.

[0069] Step 103 : if the plurality of first similarities are all greater than or equal to a preset similarity threshold, obtaining partial discharge amounts based on the plurality of current waveforms.

[0070] Exemplarily, obtaining the amount of partial discharge based on multiple current waveforms may include:

[0071] Based on the plurality of current waveforms, a target current waveform is calculated.

[0072] Based on the target current waveform, the partial discharge amount is obtained.

[0073] Exemplarily, calculating a target current waveform based on a plurality of current waveforms may include:

[0074] A plurality of current waveforms are plotted in a first coordinate system, wherein the abscissa of the first coordinate system represents time and the ordinate represents current value.

[0075] The timing of any one of the plurality of current waveforms is used as the timing of the target current waveform.

[0076] For any moment of the target current waveform, the average of the current values ​​corresponding to the moment on multiple current waveforms is used as the current value corresponding to the moment of the target current waveform.

[0077] The target current waveform is obtained according to the time of the target current waveform and the current values ​​corresponding to different time of the target current waveform.

[0078] In some specific embodiments, when local discharge occurs (i.e., multiple first similarities are greater than or equal to a preset similarity threshold), in order to reduce the error of the local discharge amount and make the calculated local discharge amount more accurate, multiple current waveforms are averaged to obtain an averaged target current waveform, and the target current waveform is used as the waveform of the pulse current in calculating the local discharge amount by the pulse current method to calculate the local discharge amount.

[0079] Exemplarily, obtaining the partial discharge amount based on the target current waveform may include:

[0080] The target current waveform is converted into a target current based on the target current waveform and the first coordinate system.

[0081] The target voltage is calculated by multiplying the target current and the sense impedance.

[0082] The target voltage is amplified and displayed to obtain the partial discharge amount.

[0083] In some specific embodiments, the target current is the effective value of the current. Different target current waveforms are converted to different effective values ​​of the current. Generally, the target current waveform is approximately regarded as the standard current waveform that is closest to it for calculation. For example, if the target current waveform is approximately a sine wave, then the effective value of the target current waveform is calculated according to the calculation formula of the effective value of the sine wave current.

[0084] Exemplarily, the partial discharge detection method may further include:

[0085] If at least one first similarity among the multiple first similarities is smaller than a preset similarity threshold, multiple current waveforms of the target primary device are reacquired.

[0086] In some specific embodiments, if at least one first similarity among multiple first similarities is less than a preset similarity threshold, it proves that the current acquired at this time is disturbed current data, and local discharge does not occur. At this time, it is necessary to reacquire multiple current waveforms of the target primary device.

[0087] The above-mentioned partial discharge detection method first obtains multiple current waveforms of the target primary equipment, and determines whether partial discharge occurs by calculating and comparing the similarity of the current waveforms. When partial discharge occurs, the similarity between the multiple current waveforms will be very high. If the current waveform is only disturbed and no partial discharge occurs, the similarity between the multiple current waveforms will be very low. Judging whether partial discharge occurs by similarity can ensure detection at sites with large electrical interference. At the same time, calculating the amount of partial discharge based on multiple current waveforms is more accurate than directly calculating the amount of partial discharge.

[0088] In addition, due to the existence of a preset similarity threshold, even if there is electrical interference, the target current waveform calculated by multiple current waveforms can reduce the impact of the electrical interference to a certain extent (because electrical interference generally does not affect all current monitoring devices at the same time, the target current waveform obtained based on the average value will reduce the amount of electrical interference, thereby ensuring the accuracy of relevant data when calculating the partial discharge amount).

[0089] In addition, the traditional pulse current method needs to filter the acquisition equipment when calculating the partial discharge under high electrical interference. Only when the clutter is completely filtered out can a relatively accurate partial discharge be calculated. This process takes a long time. In this solution, simple filtering can be performed or even no filtering is performed. Because of the existence of similarity, the interference of clutter on subsequent calculations can be filtered out to a large extent, ensuring the accuracy of subsequent partial discharge calculations. Because the time to build a high-precision filtering structure is reduced, the time to obtain the result is shortened, which ultimately makes this solution more efficient than the traditional pulse current method under high electrical interference.

[0090] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0091] Corresponding to the partial discharge detection method described in the above embodiment, Figure 3 A structural block diagram of a partial discharge detection device provided in an embodiment of the present application is shown. For ease of explanation, only the parts related to the embodiment of the present application are shown.

[0092] See also Figure 3 , the partial discharge detection device in the embodiment of the present application may include:

[0093] The data acquisition module 201 is used to acquire multiple current waveforms of a target primary device; wherein the multiple current waveforms are current waveforms of the target primary device at the same moment.

[0094] The data calculation module 202 is used to calculate the similarity between any current waveform and other current waveforms to obtain multiple first similarities.

[0095] The data output module 203 is configured to obtain partial discharge amounts based on a plurality of current waveforms if the plurality of first similarities are all greater than or equal to a preset similarity threshold.

[0096] Exemplarily, the data output module 203 may be used to:

[0097] Based on the plurality of current waveforms, a target current waveform is calculated.

[0098] Based on the target current waveform, the partial discharge amount is obtained.

[0099] Exemplarily, the data output module 203 may be used to:

[0100] A plurality of current waveforms are plotted in a first coordinate system, wherein the abscissa of the first coordinate system represents time and the ordinate represents current value.

[0101] The timing of any one of the plurality of current waveforms is used as the timing of the target current waveform.

[0102] For any moment of the target current waveform, the average of the current values ​​corresponding to the moment on multiple current waveforms is used as the current value corresponding to the moment of the target current waveform.

[0103] The target current waveform is obtained according to the time of the target current waveform and the current values ​​corresponding to different time of the target current waveform.

[0104] Exemplarily, the data output module 203 may be used to:

[0105] The target current waveform is converted into a target current based on the target current waveform and the first coordinate system.

[0106] The target voltage is calculated by multiplying the target current and the sense impedance.

[0107] The target voltage is amplified and displayed to obtain the partial discharge amount.

[0108] Exemplarily, the data calculation module 202 may be used to:

[0109] In combination with the first formula, the similarity between the current waveform and other current waveforms is calculated to obtain multiple first similarities.

[0110] The first formula can be:

[0111]

[0112] Among them, C i represents the similarity between the current waveform and the current waveform i, x represents the number of moments in the current waveform, y x0 represents the current value of the current waveform at the xth moment, y xi Represents the current value of current waveform i at the xth moment.

[0113] Exemplarily, the data output module 203 may also be used for:

[0114] If at least one first similarity among the multiple first similarities is smaller than a preset similarity threshold, multiple current waveforms of the target primary device are reacquired.

[0115] Exemplarily, the data acquisition module 201 may also be used for:

[0116] By using multiple current monitoring devices, the current of the target primary device is monitored simultaneously to obtain multiple groups of currents within the same time period.

[0117] Based on multiple groups of multiple currents in the same time period, multiple current waveforms are obtained.

[0118] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0119] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be 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. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0120] The present application also provides a terminal device, see Figure 4 The terminal device 300 may include: at least one processor 310 and a memory 320, wherein the memory 320 is used to store a computer program 321, and the processor 310 is used to call and run the computer program 321 stored in the memory 320 to implement the steps in any of the above-mentioned method embodiments, for example Figure 1 Steps 101 to 103 in the illustrated embodiment. Alternatively, when the processor 310 executes the computer program, the functions of each module / unit in the above-mentioned device embodiments are implemented, for example Figure 3 The functions of each module are shown.

[0121] Exemplarily, the computer program 321 may be divided into one or more modules / units, one or more modules / units are stored in the memory 320, and are executed by the processor 310 to complete the present application. The one or more modules / units may be a series of computer program segments that can complete specific functions, and the program segments are used to describe the execution process of the computer program in the terminal device 300.

[0122] Those skilled in the art will understand that Figure 4 It is only an example of a terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components, such as input and output devices, network access devices, buses, etc.

[0123] The processor 310 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 the processor may be any conventional processor, etc.

[0124] The memory 320 may be an internal storage unit of the terminal device, or an external storage device of the terminal device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. The memory 320 is used to store the computer program and other programs and data required by the terminal device. The memory 320 may also be used to temporarily store data that has been output or is to be output.

[0125] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0126] The partial discharge detection method provided in the embodiments of the present application can be applied to terminal devices such as computers, wearable devices, vehicle-mounted devices, tablet computers, laptop computers, netbooks, etc. The embodiments of the present application do not impose any restrictions on the specific types of terminal devices.

[0127] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in each embodiment of the above-mentioned partial discharge detection method can be implemented.

[0128] An embodiment of the present application provides a computer program product. When the computer program product runs on a mobile terminal, the mobile terminal can implement the steps in each embodiment of the above-mentioned partial discharge detection method when executing the computer program product.

[0129] If the integrated unit 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 this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can 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. Among them, 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. The computer-readable medium may at least include: any entity or device that can carry the computer program code to the camera device / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium. For example, a USB flash drive, a mobile hard disk, a disk or an optical disk.

[0130] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0131] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0132] In the embodiments provided in the present application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0133] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0134] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A partial discharge detection method, characterized in that: include: Acquire multiple current waveforms of a target primary device; wherein the multiple current waveforms are current waveforms of the target primary device at the same time; For any current waveform, calculating the similarity between the current waveform and other current waveforms to obtain a plurality of first similarities; If the plurality of first similarities are all greater than or equal to a preset similarity threshold, obtaining partial discharge amounts based on the plurality of current waveforms; The obtaining of the partial discharge amount based on the multiple current waveforms comprises: calculating a target current waveform based on the plurality of current waveforms; Based on the target current waveform, obtaining a partial discharge amount; The step of calculating a target current waveform based on the plurality of current waveforms comprises: Plotting the multiple current waveforms in a first coordinate system; wherein the abscissa of the first coordinate system represents time, and the ordinate represents current value; Taking the time of any one of the multiple current waveforms as the time of the target current waveform; For any moment of the target current waveform, taking the average of the current values ​​corresponding to the moment on the multiple current waveforms as the current value corresponding to the moment of the target current waveform; Obtaining the target current waveform according to the time of the target current waveform and the current values ​​corresponding to different times of the target current waveform; The obtaining of the partial discharge amount based on the target current waveform comprises: Based on the target current waveform and the first coordinate system, converting the target current waveform into a target current; Calculating the product of the target current and the detection impedance to obtain a target voltage; The target voltage is amplified and displayed to obtain the partial discharge amount.

2. The partial discharge detection method according to claim 1, characterized in that: The calculating the similarity between the current waveform and other current waveforms to obtain a plurality of first similarities includes: In combination with the first formula, the similarity between the current waveform and other current waveforms is calculated to obtain a plurality of first similarities; The first formula is: in, The current waveform is shown in Figure 2. The similarity of represents the number of moments in the current waveform, Indicates The current value of the current waveform at the moment, Indicates Current waveform at time The current value.

3. The partial discharge detection method according to claim 1, characterized in that: The partial discharge detection method further comprises: If at least one first similarity among the multiple first similarities is smaller than the preset similarity threshold, multiple current waveforms of the target primary device are reacquired.

4. The partial discharge detection method according to claim 1, characterized in that: The obtaining of multiple current waveforms of the target primary device includes: By using multiple current monitoring devices, the current of the target primary device is monitored simultaneously to obtain multiple groups of multiple currents in the same time period; The multiple current waveforms are obtained based on the multiple groups of multiple currents in the same time period.

5. A partial discharge detection device, characterized in that: include: A data acquisition module, used to acquire multiple current waveforms of a target primary device; wherein the multiple current waveforms are current waveforms of the target primary device at the same time; A data calculation module, used for calculating the similarity between any current waveform and other current waveforms to obtain a plurality of first similarities; A data output module, configured to obtain a partial discharge amount based on the multiple current waveforms if the multiple first similarities are all greater than or equal to a preset similarity threshold; The data output module is used to: calculating a target current waveform based on the plurality of current waveforms; Based on the target current waveform, obtaining a partial discharge amount; The data output module is used to: Plotting the multiple current waveforms in a first coordinate system; wherein the abscissa of the first coordinate system represents time, and the ordinate represents current value; Taking the time of any one of the multiple current waveforms as the time of the target current waveform; For any moment of the target current waveform, taking the average of the current values ​​corresponding to the moment on the multiple current waveforms as the current value corresponding to the moment of the target current waveform; Obtaining the target current waveform according to the time of the target current waveform and the current values ​​corresponding to different times of the target current waveform; The data output module is used to: Based on the target current waveform and the first coordinate system, converting the target current waveform into a target current; Calculating the product of the target current and the detection impedance to obtain a target voltage; The target voltage is amplified and displayed to obtain the partial discharge amount.

6. A terminal device, comprising: A processor and a memory, wherein the memory stores a computer program that can be run on the processor, wherein the processor implements the partial discharge detection method according to any one of claims 1 to 4 when executing the computer program.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the partial discharge detection method according to any one of claims 1 to 4 is implemented.

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