Method, device and equipment for monitoring partial discharge state of power collection circuit and storage medium
By setting up an array of high-frequency partial discharge sensors on the collector line, high-frequency pulse current data is acquired and analyzed to directly determine and locate the partial discharge state, solving the problem of insufficient real-time performance in the existing technology and realizing real-time monitoring and fault location of the collector line.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA RESOURCES NEW ENERGY (SUIXIAN TIANHEKOU) WIND ENERGY CO LTD
- Filing Date
- 2024-12-27
- Publication Date
- 2026-06-23
Smart Images
Figure CN119881550B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of line monitoring technology, and in particular relates to methods, devices, equipment and storage media for monitoring the partial discharge status of collector lines. Background Technology
[0002] Currently, methods for monitoring the partial discharge status of power transmission lines mainly rely on advanced sensor technology and data analysis algorithms to achieve real-time monitoring and fault early warning of line conditions. These methods use highly sensitive sensors to capture weak discharge signals and employ complex algorithms to analyze and process these signals, thereby accurately determining the health status of the line. Furthermore, the monitoring system can combine historical data and environmental factors to perform trend analysis and prediction, providing strong support for the stable operation of the power system. Through these technologies, power maintenance personnel can promptly identify potential fault points, take preventative measures, avoid large-scale power outages, and ensure power supply safety and efficiency.
[0003] For transient partial discharge phenomena, failure to quickly identify the anomaly can damage the line. In existing monitoring methods, the complexity of numerous algorithms directly impacts the real-time performance of the judgment, and these methods still have limitations in terms of real-time capabilities. Therefore, real-time anomaly identification is particularly crucial, as it directly relates to the timely detection and location of partial discharge problems in the collector line. Summary of the Invention
[0004] This application provides a method, apparatus, device, and storage medium for monitoring the partial discharge status of collector lines, in order to address the limitations of partial discharge status monitoring technology in terms of real-time performance.
[0005] This application is achieved through the following technical solution:
[0006] In a first aspect, embodiments of this application provide a method for monitoring the partial discharge status of a current collector line, wherein a high-frequency partial discharge sensor arranged in an array is installed on the target current collector line, and the method includes:
[0007] Data from high-frequency partial discharge sensors arranged in an array are acquired sequentially to obtain the set of real-time high-frequency pulse currents to be detected and the set of historical high-frequency pulse currents.
[0008] Based on the historical high-frequency pulse current set and the real-time high-frequency pulse current set to be detected, the high-frequency pulse current fluctuation set is determined.
[0009] Based on the high-frequency pulse current fluctuation set, it is determined whether the target collector line is in a partial discharge state.
[0010] In conjunction with the first aspect, among some possible implementations, the high-frequency pulse current fluctuation set is determined based on the historical high-frequency pulse current set and the real-time high-frequency pulse current set to be detected, including:
[0011] Based on the historical high-frequency pulse current set, the first target high-frequency pulse current set is determined; wherein, the first target high-frequency pulse current set represents the set of high-frequency pulse current peak values of each high-frequency partial discharge sensor when the line is normal.
[0012] Based on the set of real-time high-frequency pulse currents to be detected and the set of high-frequency pulse currents of the first target, the set of high-frequency pulse current fluctuations is determined.
[0013] In conjunction with the first aspect, among some possible implementations, the first target high-frequency pulse current set is determined based on the historical high-frequency pulse current set, including:
[0014] The first formula is used to calculate the first target high-frequency pulse current set.
[0015] The first formula is:
[0016]
[0017] Among them, a ij This represents the peak value of the high-frequency pulse current in the i-th column and j-th row of the first target high-frequency pulse current set, where M represents the number of historical high-frequency pulse current sets. ij ) m This represents the peak value of the high-frequency pulse current in the i-th column and j-th row of the m-th historical high-frequency pulse current set.
[0018] In conjunction with the first aspect, in some possible implementations, a high-frequency pulse current fluctuation set is determined based on the set of real-time high-frequency pulse currents to be detected and the set of high-frequency pulse currents of the first target, including:
[0019] The difference between the set of real-time high-frequency pulse currents to be detected and the set of high-frequency pulse currents of the first target is calculated to obtain the set of high-frequency pulse current fluctuations.
[0020] In conjunction with the first aspect, among some possible implementations, determining whether the target collector circuit exhibits a partial discharge state based on a set of high-frequency pulse current fluctuations includes:
[0021] The peak variance of high-frequency pulse current is calculated based on the peak value data of high-frequency pulse current in the high-frequency pulse current fluctuation set.
[0022] If the peak variance of the high-frequency pulse current is greater than or equal to the first preset threshold, then the target collector line is determined to be in a partial discharge state.
[0023] If the peak variance of the high-frequency pulse current is less than the first preset threshold, it is determined that the target collector line has not experienced a partial discharge state.
[0024] In conjunction with the first aspect, among some possible implementation methods, the approach also includes:
[0025] Based on the set of high-frequency pulse current fluctuations, the rate of change of multiple high-frequency pulse current peak values is calculated.
[0026] The location of partial discharge is determined based on the rate of change of peak current of multiple high-frequency pulses.
[0027] In conjunction with the first aspect, in some possible implementations, the location of partial discharge is determined based on the peak change rate of multiple high-frequency pulse currents, including:
[0028] The second formula is used to calculate the rate of change of the peak value of the high-frequency pulse current between two adjacent high-frequency pulse current peak values, and each rate of change of the peak value of the high-frequency pulse current is labeled.
[0029] For each high-frequency pulse current peak change rate, the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current peak change rate are determined according to the label of the high-frequency pulse current peak change rate. If the high-frequency pulse current peak change rate is greater than the second preset threshold, the number of pulses of the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current peak change rate is extracted. If the difference between the two pulse counts is greater than the third preset threshold, there is a partial discharge between the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current change rate.
[0030] If the difference between the number of two pulses is less than or equal to the third preset threshold, then there is no partial discharge between the two high-frequency partial discharge sensors corresponding to the peak change rate of the high-frequency pulse current.
[0031] If the rate of change of the peak value of the high-frequency pulse current is less than or equal to the second preset threshold, then there is no partial discharge between the two high-frequency partial discharge sensors corresponding to the rate of change of the peak value of the high-frequency pulse current.
[0032] The second formula is:
[0033]
[0034] Among them, C i，i+1 d represents the rate of change of the peak value of the high-frequency pulse current between the i-th high-frequency partial discharge sensor and the (i+1)-th high-frequency partial discharge sensor. i d represents the peak value of the high-frequency pulse current collected by the i-th high-frequency partial discharge sensor. i+1 This represents the peak value of the high-frequency pulse current collected by the (i+1)th high-frequency partial discharge sensor.
[0035] Secondly, embodiments of this application provide a device for monitoring the partial discharge status of a power line, comprising:
[0036] The data acquisition module is used to sequentially acquire data from the high-frequency partial discharge sensors arranged in an array, and obtain the set of real-time high-frequency pulse currents to be detected and the set of historical high-frequency pulse currents.
[0037] The data calculation module is used to determine the high-frequency pulse current fluctuation set based on the historical high-frequency pulse current set and the real-time high-frequency pulse current set to be detected.
[0038] The status monitoring module is used to determine whether the target collector line is in a partial discharge state based on the high-frequency pulse current fluctuation set.
[0039] Thirdly, embodiments of this application provide a terminal device, including: a processor and a memory, the memory being used to store a computer program, wherein the processor executes the computer program to implement the partial discharge state monitoring method for collector lines as described in any of the first aspects.
[0040] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for monitoring the partial discharge state of a collector line as described in any of the first aspects.
[0041] It is understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here.
[0042] The beneficial effects of the embodiments in this application compared with the prior art are:
[0043] This application determines a high-frequency pulse current fluctuation dataset by analyzing historical high-frequency pulse current datasets and real-time high-frequency pulse current datasets to be detected. Using this dataset, it is possible to directly determine whether partial discharge has occurred. If partial discharge is detected, the specific location of the problem can be further pinpointed based on the high-frequency pulse current fluctuation dataset. Since this process does not involve complex algorithms, it can provide real-time monitoring results, enabling timely detection and precise location of partial discharge phenomena in the collector line.
[0044] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description
[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0046] Figure 1 This is a flowchart illustrating a method for monitoring the partial discharge status of a collector line according to an embodiment of this application;
[0047] Figure 2 This is a schematic diagram of the structure of a partial discharge status monitoring device for a collector line provided in an embodiment of this application;
[0048] Figure 3 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation
[0049] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.
[0050] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.
[0051] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0052] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."
[0053] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0054] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.
[0055] This application provides a method for monitoring the partial discharge status of a current collector line. Figure 1 This is a schematic flowchart of a method for monitoring the partial discharge status of a collector line according to an embodiment of this application, with reference to... Figure 1 The detailed description of the partial discharge status monitoring method for this collector line is as follows:
[0056] Step 101: Sequentially acquire data from the arrayed high-frequency partial discharge sensors to obtain the set of real-time high-frequency pulse currents to be detected and the set of historical high-frequency pulse currents.
[0057] For example, the target collector line is equipped with a high-frequency partial discharge sensor arranged in an array. If the collector line is a single line, the number of rows of the high-frequency partial discharge sensor array is 1. If there are 2 collector lines, the number of rows of the high-frequency partial discharge sensor array is 2.
[0058] For example, the set of real-time high-frequency pulse currents to be detected consists of the peak values of high-frequency pulse currents collected sequentially from one end of the collector line to the other, from each high-frequency partial discharge sensor. The set of historical high-frequency pulse currents is similar to the set of real-time high-frequency pulse currents to be detected, except that there are differences in the data. For example, the peak value of the high-frequency pulse current in the i-th column and j-th row of the historical high-frequency pulse current set corresponds to the same high-frequency partial discharge sensor as the peak value of the high-frequency pulse current in the i-th column and j-th row of the real-time high-frequency pulse current set to be detected.
[0059] For example, high-frequency partial discharge sensors arranged in an array can be Rogowski coils, current probes, Hall effect sensors, dedicated high-frequency current sensors, etc.
[0060] For example, the frequency range of the high-frequency pulse current is from 100 kHz to 30 MHz.
[0061] For example, the raw data corresponding to the set of real-time high-frequency pulse currents to be detected is preprocessed by algorithms such as wavelet transform to remove white noise from the raw data, reduce interference, and further improve the accuracy of the detection results.
[0062] Step 102: Determine the high-frequency pulse current fluctuation set based on the historical high-frequency pulse current set and the real-time high-frequency pulse current set to be detected.
[0063] For example, step 102 may include:
[0064] Based on the historical high-frequency pulse current set, the first target high-frequency pulse current set is determined; wherein, the first target high-frequency pulse current set represents the set of average high-frequency pulse current values of each high-frequency partial discharge sensor when the line is normal.
[0065] Based on the set of real-time high-frequency pulse currents to be detected and the set of high-frequency pulse currents of the first target, the set of high-frequency pulse current fluctuations is determined.
[0066] For example, the historical high-frequency pulse current set is a set of high-frequency pulse current peak data when the collector line has no faults.
[0067] For example, determining the first target high-frequency pulse current set based on historical high-frequency pulse current sets may include:
[0068] The first formula is used to calculate the first target high-frequency pulse current set.
[0069] The first formula can be:
[0070]
[0071] Among them, a ij This represents the peak value of the high-frequency pulse current in the i-th column and j-th row of the first target high-frequency pulse current set, where M represents the number of historical high-frequency pulse current sets. ij ) m This represents the peak value of the high-frequency pulse current in the i-th column and j-th row of the m-th historical high-frequency pulse current set.
[0072] For example, in order to more accurately evaluate whether the target collector line is in a partial discharge state, it is necessary to combine the historical operating state of the target collector line for accurate evaluation, which requires obtaining the first target high-frequency pulse current set.
[0073] For example, based on the set of real-time high-frequency pulse currents to be detected and the set of high-frequency pulse currents of the first target, a set of high-frequency pulse current fluctuations is determined, including:
[0074] The difference between the set of real-time high-frequency pulse currents to be detected and the set of high-frequency pulse currents of the first target is calculated to obtain the set of high-frequency pulse current fluctuations.
[0075] For example, after calculating the set of high-frequency pulse current fluctuations, it is possible to more intuitively determine the fluctuation of the high-frequency pulse current peak value relative to the high-frequency pulse current peak value during historical normal operation.
[0076] Step 103: Based on the high-frequency pulse current fluctuation set, determine whether the target collector line is in a partial discharge state.
[0077] For example, step 103 may include:
[0078] The peak variance of high-frequency pulse current is calculated based on the peak value data of high-frequency pulse current in the high-frequency pulse current fluctuation set.
[0079] If the peak variance of the high-frequency pulse current is greater than or equal to the first preset threshold, then the target collector line is determined to be in a partial discharge state.
[0080] If the peak variance of the high-frequency pulse current is less than the first preset threshold, it is determined that the target collector line has not experienced a partial discharge state.
[0081] For example, the fluctuation level of each data point in a high-frequency pulse current fluctuation set can be assessed by the variance of the high-frequency pulse current peak value. When the fluctuation level is significant, it usually indicates that there are abnormal fluctuations in the peak value of the high-frequency pulse current, which are likely caused by partial discharge.
[0082] For example, the method may also include:
[0083] Based on the set of high-frequency pulse current fluctuations, the rate of change of multiple high-frequency pulse current peak values is calculated.
[0084] The location of partial discharge is determined based on the rate of change of peak current of multiple high-frequency pulses.
[0085] For example, determining the location of a partial discharge based on the rate of change of multiple high-frequency pulse current peaks may include:
[0086] The second formula is used to calculate the rate of change of the peak value of the high-frequency pulse current between two adjacent high-frequency pulse current peak values, and each rate of change of the peak value of the high-frequency pulse current is labeled.
[0087] For each high-frequency pulse current peak change rate, the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current peak change rate are determined according to the label of the high-frequency pulse current peak change rate. If the high-frequency pulse current peak change rate is greater than the second preset threshold, the number of pulses of the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current peak change rate is extracted. If the difference between the two pulse counts is greater than the third preset threshold, there is a partial discharge between the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current change rate.
[0088] If the difference between the number of two pulses is less than or equal to the third preset threshold, then there is no partial discharge between the two high-frequency partial discharge sensors corresponding to the peak change rate of the high-frequency pulse current.
[0089] If the rate of change of the peak value of the high-frequency pulse current is less than or equal to the second preset threshold, then there is no partial discharge between the two high-frequency partial discharge sensors corresponding to the rate of change of the peak value of the high-frequency pulse current.
[0090] For example, environmental changes can also cause abnormal fluctuations in the peak value of high-frequency pulse current. In this case, to eliminate interference from environmental factors, it is necessary to extract the pulse counts from the two high-frequency partial discharge sensors. If a significant difference is found between the pulse counts of the two pairs (greater than a third preset threshold), this can be used as evidence of the presence of a partial discharge state.
[0091] The second formula can be:
[0092]
[0093] Among them, C i，i+1 d represents the rate of change of the peak value of the high-frequency pulse current between the i-th high-frequency partial discharge sensor and the (i+1)-th high-frequency partial discharge sensor. i d represents the peak value of the high-frequency pulse current collected by the i-th high-frequency partial discharge sensor. i+1 This represents the peak value of the high-frequency pulse current collected by the (i+1)th high-frequency partial discharge sensor.
[0094] The aforementioned method for monitoring the partial discharge status of power collector lines determines a high-frequency pulse current fluctuation dataset by analyzing historical high-frequency pulse current datasets and the real-time high-frequency pulse current dataset to be detected. Using this dataset, it is possible to directly determine whether a partial discharge phenomenon has occurred. If a partial discharge state is detected, the specific location of the problem can be further pinpointed based on the high-frequency pulse current fluctuation dataset. Since this process does not involve complex algorithms, it can provide monitoring results in real time, enabling timely detection and precise location of partial discharge phenomena in power collector lines.
[0095] It should be understood that the sequence number of each step in the above embodiments does not imply 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 this application.
[0096] Corresponding to the partial discharge status monitoring method for collector lines described in the above embodiments, Figure 2 A structural block diagram of the partial discharge status monitoring device for collector lines provided in the embodiments of this application is shown. For ease of explanation, only the parts related to the embodiments of this application are shown.
[0097] See Figure 2 The partial discharge status monitoring device for collector lines in this application embodiment may include:
[0098] The data acquisition module 201 is used to sequentially acquire data from the high-frequency partial discharge sensors arranged in an array to obtain the set of real-time high-frequency pulse currents to be detected and the set of historical high-frequency pulse currents.
[0099] The data calculation module 202 is used to determine the high-frequency pulse current fluctuation set based on the historical high-frequency pulse current set and the real-time high-frequency pulse current set to be detected.
[0100] The status monitoring module 203 is used to determine whether the target collector line is in a partial discharge state based on the high-frequency pulse current fluctuation set.
[0101] For example, the data calculation module 202 can be used to:
[0102] Based on the historical high-frequency pulse current set, the first target high-frequency pulse current set is determined; wherein, the first target high-frequency pulse current set represents the set of average high-frequency pulse current values of each high-frequency partial discharge sensor when the line is normal.
[0103] Based on the set of real-time high-frequency pulse currents to be detected and the set of high-frequency pulse currents of the first target, the set of high-frequency pulse current fluctuations is determined.
[0104] For example, the data calculation module 202 can be used to:
[0105] The first formula is used to calculate the first target high-frequency pulse current set.
[0106] The first formula can be:
[0107]
[0108] Among them, a ij This represents the peak value of the high-frequency pulse current in the i-th column and j-th row of the first target high-frequency pulse current set, where M represents the number of historical high-frequency pulse current sets. ij ) mThis represents the peak value of the high-frequency pulse current in the i-th column and j-th row of the m-th historical high-frequency pulse current set.
[0109] For example, the data calculation module 202 can be used to:
[0110] The difference between the set of real-time high-frequency pulse currents to be detected and the set of high-frequency pulse currents of the first target is calculated to obtain the set of high-frequency pulse current fluctuations.
[0111] For example, the status monitoring module 203 can be used to:
[0112] The peak variance of high-frequency pulse current is calculated based on the peak value data of high-frequency pulse current in the high-frequency pulse current fluctuation set.
[0113] If the peak variance of the high-frequency pulse current is greater than or equal to the first preset threshold, then the target collector line is determined to be in a partial discharge state.
[0114] If the peak variance of the high-frequency pulse current is less than the first preset threshold, it is determined that the target collector line has not experienced a partial discharge state.
[0115] For example, the status monitoring module 203 can also be used for:
[0116] Based on the set of high-frequency pulse current fluctuations, the rate of change of multiple high-frequency pulse current peak values is calculated.
[0117] The location of partial discharge is determined based on the rate of change of peak current of multiple high-frequency pulses.
[0118] For example, the status monitoring module 203 can be used to:
[0119] The second formula is used to calculate the rate of change of the peak value of the high-frequency pulse current between two adjacent high-frequency pulse current peak values, and each rate of change of the peak value of the high-frequency pulse current is labeled.
[0120] For each high-frequency pulse current peak change rate, the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current peak change rate are determined according to the label of the high-frequency pulse current peak change rate. If the high-frequency pulse current peak change rate is greater than the second preset threshold, the number of pulses of the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current peak change rate is extracted. If the difference between the two pulse counts is greater than the third preset threshold, there is a partial discharge between the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current change rate.
[0121] If the difference between the number of two pulses is less than or equal to the third preset threshold, then there is no partial discharge between the two high-frequency partial discharge sensors corresponding to the peak change rate of the high-frequency pulse current.
[0122] If the rate of change of the peak value of the high-frequency pulse current is less than or equal to the second preset threshold, then there is no partial discharge between the two high-frequency partial discharge sensors corresponding to the rate of change of the peak value of the high-frequency pulse current.
[0123] The second formula can be:
[0124]
[0125] Among them, C i，i+1 d represents the rate of change of the peak value of the high-frequency pulse current between the i-th high-frequency partial discharge sensor and the (i+1)-th high-frequency partial discharge sensor. i d represents the peak value of the high-frequency pulse current collected by the i-th high-frequency partial discharge sensor. i+1 This represents the peak value of the high-frequency pulse current collected by the (i+1)th high-frequency partial discharge sensor.
[0126] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.
[0127] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to 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 embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.
[0128] This application also provides a terminal device, see [link to relevant documentation] Figure 3 The terminal device 300 may include at least one processor 310 and a memory 320. The memory 320 is used to store a computer program 321. 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 method embodiments, for example... Figure 1 Steps 101 to 103 in the illustrated embodiment. Alternatively, when the processor 310 executes the computer program, it implements the functions of each module / unit in the above-described device embodiments, for example... Figure 2The functions of each module are shown.
[0129] For example, computer program 321 may be divided into one or more modules / units, one or more of which are stored in memory 320 and executed by processor 310 to complete this application. The one or more modules / units may be a series of computer program segments capable of performing specific functions, which describe the execution process of the computer program in terminal device 300.
[0130] Those skilled in the art will understand that Figure 3 This is merely 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, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.
[0131] The processor 310 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.
[0132] The memory 320 can be an internal storage unit of the terminal device or an external storage device, such as a plug-in hard drive, a smart media card (SMC), a secure digital card (SD), or a flash card. The memory 320 is used to store the computer program and other programs and data required by the terminal device. The memory 320 can also be used to temporarily store data that has been output or will be output.
[0133] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.
[0134] The partial discharge status monitoring method for collector lines provided in this application embodiment can be applied to terminal devices such as computers, wearable devices, vehicle-mounted devices, tablet computers, laptop computers, and netbooks. This application embodiment does not impose any restrictions on the specific type of terminal device.
[0135] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps in the various embodiments of the above-described method for monitoring the partial discharge status of a collector line.
[0136] This application provides a computer program product that, when run on a mobile terminal, enables the mobile terminal to implement the steps in the various embodiments of the above-described method for monitoring the partial discharge status of a power line.
[0137] If the integrated unit is implemented as 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, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying the computer program code to a photographing device / terminal device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks.
[0138] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0139] Those skilled in the art will recognize that the units and algorithm steps of the various examples 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 implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
[0140] In the embodiments provided in this application, it should be understood that the disclosed apparatus / network devices and methods can be implemented in other ways. For example, the apparatus / network device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.
[0141] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0142] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A method for monitoring the partial discharge status of a current collector line, characterized in that, The target data collection line is equipped with high-frequency partial discharge sensors arranged in an array, and the method includes: Data from high-frequency partial discharge sensors arranged in an array are acquired sequentially to obtain the set of real-time high-frequency pulse currents to be detected and the set of historical high-frequency pulse currents. Based on the historical high-frequency pulse current set and the real-time high-frequency pulse current set to be detected, the high-frequency pulse current fluctuation set is determined. Based on the high-frequency pulse current fluctuation set, determine whether the target collector line is in a partial discharge state; The step of determining the high-frequency pulse current fluctuation set based on the historical high-frequency pulse current set and the real-time high-frequency pulse current set to be detected includes: Based on the historical high-frequency pulse current set, a first target high-frequency pulse current set is determined; wherein, the first target high-frequency pulse current set represents the set of high-frequency pulse current peak values of each high-frequency partial discharge sensor when the line is normal. Based on the set of real-time high-frequency pulse currents to be detected and the set of the first target high-frequency pulse currents, a set of high-frequency pulse current fluctuations is determined. The step of determining the first target high-frequency pulse current set based on the historical high-frequency pulse current set includes: The first formula is used to calculate the set of high-frequency pulse currents of the first target. The first formula is: in, Indicates the first target high-frequency pulse current set. Liede The peak value of the high-frequency pulse current of the line, This indicates the number of historical high-frequency pulse current sets. Indicates the first The first in the historical high-frequency pulse current set Liede The peak value of the high-frequency pulse current; The method further includes: Based on the aforementioned high-frequency pulse current fluctuation set, calculate the peak change rate of multiple high-frequency pulse currents; The location of partial discharge is determined based on the peak change rate of the multiple high-frequency pulse currents; The step of determining the location of partial discharge based on the peak change rate of the plurality of high-frequency pulse currents includes: The second formula is used to calculate the rate of change of the peak value of the high-frequency pulse current between two adjacent high-frequency pulse current peak values, and each rate of change of the peak value of the high-frequency pulse current is labeled. For each high-frequency pulse current peak change rate, the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current peak change rate are determined according to the label of the high-frequency pulse current peak change rate. If the high-frequency pulse current peak change rate is greater than the second preset threshold, the number of pulses of the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current peak change rate is extracted. If the difference between the two pulse counts is greater than the third preset threshold, there is a partial discharge between the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current change rate. If the difference between the number of two pulses is less than or equal to the third preset threshold, then there is no partial discharge between the two high-frequency partial discharge sensors corresponding to the peak change rate of the high-frequency pulse current. If the peak change rate of the high-frequency pulse current is less than or equal to the second preset threshold, then there is no partial discharge between the two high-frequency partial discharge sensors corresponding to the peak change rate of the high-frequency pulse current. The second formula is: in, Indicates the first The high-frequency partial discharge sensor and the first Rate of change of peak high-frequency pulse current between high-frequency partial discharge sensors Indicates the first The peak value of the high-frequency pulse current collected by a high-frequency partial discharge sensor. Indicates the first The peak value of the high-frequency pulse current collected by a high-frequency partial discharge sensor.
2. The method for monitoring the partial discharge status of a collector line as described in claim 1, characterized in that, The step of determining the high-frequency pulse current fluctuation set based on the set of real-time high-frequency pulse currents to be detected and the first target high-frequency pulse current set includes: The difference between the set of real-time high-frequency pulse currents to be detected and the set of first target high-frequency pulse currents is calculated to obtain the set of high-frequency pulse current fluctuations.
3. The method for monitoring the partial discharge status of a collector line as described in claim 1, characterized in that, The step of determining whether the target collector line is in a partial discharge state based on the high-frequency pulse current fluctuation set includes: Based on the high-frequency pulse current peak data in the high-frequency pulse current fluctuation set, the high-frequency pulse current peak variance is calculated. If the peak variance of the high-frequency pulse current is greater than or equal to the first preset threshold, then it is determined that the target collector line is in a partial discharge state. If the peak variance of the high-frequency pulse current is less than the first preset threshold, then it is determined that the target collector line has not experienced a partial discharge state.
4. A device for monitoring the partial discharge status of a current collector line, characterized in that, The target data collector is equipped with a high-frequency partial discharge sensor arranged in an array, and the device includes: The data acquisition module is used to sequentially acquire data from the high-frequency partial discharge sensors arranged in an array to obtain the set of real-time high-frequency pulse currents to be detected and the set of historical high-frequency pulse currents. The data calculation module is used to determine the high-frequency pulse current fluctuation set based on the historical high-frequency pulse current set and the real-time high-frequency pulse current set to be detected; The status monitoring module is used to determine whether the target collector line is in a partial discharge state based on the high-frequency pulse current fluctuation set. The data calculation module is used for: Based on the historical high-frequency pulse current set, a first target high-frequency pulse current set is determined; wherein, the first target high-frequency pulse current set represents the set of high-frequency pulse current peak values of each high-frequency partial discharge sensor when the line is normal. Based on the set of real-time high-frequency pulse currents to be detected and the set of the first target high-frequency pulse currents, a set of high-frequency pulse current fluctuations is determined. The data calculation module is used for: The first formula is used to calculate the set of high-frequency pulse currents of the first target. The first formula is: in, Indicates the first target high-frequency pulse current set. Liede The peak value of the high-frequency pulse current of the line, This indicates the number of historical high-frequency pulse current sets. Indicates the first The first in the historical high-frequency pulse current set Liede The peak value of the high-frequency pulse current; The status monitoring module is also used for: Based on the aforementioned high-frequency pulse current fluctuation set, calculate the peak change rate of multiple high-frequency pulse currents; The location of partial discharge is determined based on the peak change rate of the multiple high-frequency pulse currents; The status monitoring module is used for: The second formula is used to calculate the rate of change of the peak value of the high-frequency pulse current between two adjacent high-frequency pulse current peak values, and each rate of change of the peak value of the high-frequency pulse current is labeled. For each high-frequency pulse current peak change rate, the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current peak change rate are determined according to the label of the high-frequency pulse current peak change rate. If the high-frequency pulse current peak change rate is greater than the second preset threshold, the number of pulses of the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current peak change rate is extracted. If the difference between the two pulse counts is greater than the third preset threshold, there is a partial discharge between the two high-frequency partial discharge sensors corresponding to the high-frequency pulse current change rate. If the difference between the number of two pulses is less than or equal to the third preset threshold, then there is no partial discharge between the two high-frequency partial discharge sensors corresponding to the peak change rate of the high-frequency pulse current. If the peak change rate of the high-frequency pulse current is less than or equal to the second preset threshold, then there is no partial discharge between the two high-frequency partial discharge sensors corresponding to the peak change rate of the high-frequency pulse current. The second formula is: in, Indicates the first The high-frequency partial discharge sensor and the first Rate of change of peak high-frequency pulse current between high-frequency partial discharge sensors Indicates the first The peak value of the high-frequency pulse current collected by a high-frequency partial discharge sensor. Indicates the first The peak value of the high-frequency pulse current collected by a high-frequency partial discharge sensor.
5. A terminal device, comprising: A processor and a memory, wherein the memory stores a computer program executable on the processor, characterized in that, when the processor executes the computer program, it implements the method for monitoring the partial discharge status of a collector line as described in any one of claims 1 to 3.
6. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for monitoring the partial discharge status of the collector line as described in any one of claims 1 to 3.