Distribution network weak link identification method, device and equipment based on feeder section fault

Abstract

The application relates to a distribution network weak link identification method, device and equipment based on feeder section faults. The method comprises the following steps: acquiring respective feeder section fault events corresponding to each feeder section in a distribution network, and treatment action records corresponding to the feeder section fault events; for each feeder section in the distribution network, based on the feeder section fault events corresponding to the feeder section and the treatment action records corresponding to the feeder section fault events, the comprehensive treatment capacity of the feeder section is determined; based on the comprehensive treatment capacity of the feeder section and the operation data of the feeder section, the fault treatment index corresponding to the feeder section is determined; based on the fault treatment index corresponding to each feeder section in the distribution network and the corresponding index threshold, the weak feeder section in the distribution network is determined. The method can improve the identification accuracy of the weak link.

Description

Technical Field

[0001] This application relates to the field of power distribution network technology, and in particular to a method, apparatus and equipment for identifying weak links in power distribution networks based on feeder segment faults. Background Technology

[0002] In related technologies, the identification of weak links in distribution networks is usually based on analysis of single data such as the number of historical faults and equipment failure rates. This often results in identification results that are based on the direct application of post-event statistical data, which leads to insufficient accuracy in identifying weak links. Therefore, there is an urgent need for a distribution network weak link identification method based on feeder segment faults to improve the accuracy of weak link identification. Summary of the Invention

[0003] Therefore, it is necessary to provide a method, device, and equipment for identifying distribution network weak links based on feeder segment faults, which can improve the accuracy of identifying weak links, in order to address the above-mentioned technical problems.

[0004] Firstly, this application provides a method for identifying weak links in a distribution network based on feeder segmentation faults, including:

[0005] Obtain the corresponding feeder segment fault events for each feeder segment in the distribution network, as well as the corresponding handling action records for each feeder segment fault event;

[0006] For each feeder segment in the distribution network, the comprehensive handling capability of the feeder segment is determined based on the feeder segment fault events and the corresponding handling action records.

[0007] Based on the comprehensive handling capabilities of the feeder segment and the operating data of the feeder segment, the fault handling indicators corresponding to the feeder segment are determined.

[0008] Based on the fault handling indicators and corresponding indicator thresholds for each feeder segment in the distribution network, the weak feeder segments in the distribution network are determined.

[0009] In one embodiment, the handling action record includes a successful isolation action record, a successful power transfer action record, a successful recovery action record, and a successful re-isolation action record after recovery; the determination of the comprehensive handling capability of each feeder segment in the distribution network, based on the feeder segment fault event corresponding to the feeder segment and the handling action record corresponding to the feeder segment fault event, includes:

[0010] For each feeder segment in the distribution network, the segment isolation capability parameters are determined based on the number of feeder segment fault events corresponding to the feeder segment and the number of successful isolations recorded in the isolation action success record;

[0011] Based on the number of feeder segment fault events and the number of successful recovery events corresponding to the feeder segment, the segment transfer capacity parameters are determined; wherein, the number of successful recovery events is determined based on the successful transfer action records and the successful recovery action records;

[0012] Based on the number of feeder segment fault events and the number of stable power restorations corresponding to the feeder segment, the stable power restoration capability parameters of the segment are determined; wherein, the number of stable power restorations is determined based on the successful records of the recovery action and the successful records of the re-isolation action after recovery;

[0013] Based on the segmented isolation capability parameters, the segmented power transfer capability parameters, and the segmented stable power restoration capability parameters, the comprehensive handling capability of the feeder segment is determined.

[0014] In one embodiment, obtaining the comprehensive handling capability of the feeder segment based on the segment isolation capability parameters, the segment power transfer capability parameters, and the segment stable power restoration capability parameters includes:

[0015] Based on the minimum value among the segmented power transfer capability parameters and the segmented stable power restoration capability parameters, the consistency constraint parameters corresponding to the feeder segment are determined;

[0016] Based on the segmented isolation capability parameters and the consistency constraint parameters, determine the composite parameters of the stable handling capability corresponding to the feeder segment;

[0017] Based on the segmented isolation capability parameters, the segmented power transfer capability parameters, the segmented stable power restoration capability parameters, and the composite parameter of stable handling capability, the comprehensive handling capability of the feeder segment is obtained.

[0018] In one embodiment, determining the fault handling indicators corresponding to the feeder segment based on the comprehensive handling capability of the feeder segment and the operating data of the feeder segment includes:

[0019] Based on the segmented power transfer capability parameters and segmented stable power restoration capability parameters included in the comprehensive handling capability, the unstable handling capability parameters of the feeder segment are determined.

[0020] Based on the operational data of the feeder segment and the composite parameter of stable handling capability included in the comprehensive handling capability, the fault handling implementation condition index corresponding to the feeder segment is determined; wherein, the fault handling implementation condition index is negatively correlated with the operational data;

[0021] Based on the operating data of the feeder segment and the instability handling capability parameters, the fault handling scenario penalty constraints corresponding to the feeder segment are determined; wherein, the fault handling scenario penalty constraints are positively correlated with the operating data;

[0022] The fault handling indicators corresponding to the feeder segment are obtained by weighting the implementation condition indicators and the penalty constraints of the fault handling scenario.

[0023] In one embodiment, before determining the weak feeder segment in the distribution network based on the fault handling indicators and corresponding indicator thresholds corresponding to each feeder segment in the distribution network, the method further includes:

[0024] Obtain the indicator mapping relationship table; the indicator mapping relationship table contains multiple indicator thresholds, and the event quantity range corresponding to each of the multiple indicator thresholds;

[0025] Based on the number of feeder segment fault events corresponding to the feeder segment, data matching is performed in the indicator mapping table to determine the indicator threshold corresponding to the feeder segment.

[0026] In one embodiment, the method further includes:

[0027] Obtain the disposal guidance rule table; wherein, the disposal guidance rule table contains various disposal guidance information, as well as the comprehensive disposal capability range and operation data range corresponding to each of the various disposal guidance information;

[0028] For the weak feeder segments in the distribution network, the corresponding handling guidance information is determined by matching the corresponding operating data and comprehensive handling capabilities of the weak feeder segments in the handling guidance rule table.

[0029] Secondly, this application also provides a distribution network weak link identification device based on feeder segment faults, comprising:

[0030] The acquisition module is used to acquire the feeder segment fault events corresponding to each feeder segment in the distribution network, as well as the handling action records corresponding to each feeder segment fault event.

[0031] The data statistics module is used to determine the comprehensive handling capability of each feeder segment in the distribution network based on the feeder segment fault events and the corresponding handling action records.

[0032] The data processing module is used to determine the fault handling indicators corresponding to the feeder segment based on the comprehensive handling capability of the feeder segment and the operating data of the feeder segment.

[0033] The output module is used to determine the weak feeder segments in the distribution network based on the fault handling indicators and corresponding indicator thresholds of each feeder segment in the distribution network.

[0034] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described method.

[0035] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0036] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described method.

[0037] The aforementioned method, apparatus, and equipment for identifying distribution network weak links based on feeder segment faults, by integrating feeder segment fault events and handling action records, can systematically characterize the handling capabilities of feeder segments during long-term operation. Simultaneously, by combining operational data and comprehensive handling capabilities to determine fault handling indicators, it can achieve quantitative analysis of the handling capabilities of feeder segments under current operating loads. Finally, weak feeder segments are identified through the fault handling indicators corresponding to each feeder segment. Compared to related technologies that rely solely on statistical data for distribution network weak link identification, this process combines actual operating data and long-term comprehensive handling capabilities of feeder segments to identify weak feeder segments. This transforms weak link identification from a simple historical review to a comprehensive judgment based on current and planned operating states, thereby objectively reflecting the actual weakness of each segment and significantly improving the accuracy and reliability of distribution network weak link identification. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is an application environment diagram of a distribution network weak link identification method based on feeder segmentation faults in one embodiment;

[0040] Figure 2 This is a flowchart illustrating a distribution network weak link identification method based on feeder segment faults in one embodiment.

[0041] Figure 3 This is a flowchart illustrating step 202 in one embodiment;

[0042] Figure 4 This is a structural block diagram of a distribution network weak link identification device based on feeder segment faults in one embodiment;

[0043] Figure 5 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0046] The distribution network weak link identification method based on feeder segment faults provided in this application embodiment can be applied to, for example... Figure 1 The application environment shown is illustrated. Terminal 101 communicates with server 102 via a network. A data storage system can store the data that server 102 needs to process. The data storage system can be integrated onto server 102, or it can be located in the cloud or on another network server.

[0047] Power grid maintenance personnel can initiate a weak link identification request for a target distribution network through terminal 101. Upon receiving the request, server 102 queries the data storage system to obtain the corresponding feeder segment fault events and corresponding action records for each feeder segment in the distribution network. For each feeder segment, based on the feeder segment fault events and their corresponding action records, the server determines the comprehensive handling capability of the feeder segment. Based on the comprehensive handling capability and operational data of the feeder segment, the server determines the corresponding fault handling indicators. Based on the fault handling indicators and corresponding threshold values ​​for each feeder segment in the distribution network, the server identifies the weak feeder segments in the distribution network.

[0048] Terminal 101 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, drones, low-altitude aircraft, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, and projection equipment. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted displays. Head-mounted displays can be virtual reality (VR) devices, augmented reality (AR) devices, and smart glasses.

[0049] Server 102 can be a standalone physical server, a server cluster or distributed system consisting of multiple physical servers, or a cloud server that provides cloud computing services.

[0050] In one exemplary embodiment, such as Figure 2 As shown, a method for identifying weak links in a distribution network based on feeder segmentation faults is provided, and this method is applied to... Figure 1 Taking the server in the example, the explanation includes the following steps 201 to 204. Wherein:

[0051] Step 201: Obtain the corresponding feeder segment fault events for each feeder segment in the distribution network, as well as the corresponding handling action records for each feeder segment fault event.

[0052] Among them, the distribution network refers to the power grid that receives electrical energy from the transmission network or regional power plants and distributes it locally or to various users in stages according to voltage through distribution facilities; the distribution network may also include overhead lines, cables, poles, distribution transformers, disconnecting switches, reactive power compensators and some ancillary facilities.

[0053] Feeder segmentation refers to dividing the power grid into several independent and controllable line sections using equipment such as switches and circuit breakers to meet the needs of power distribution network fault isolation, load transfer, and operation and maintenance.

[0054] Feeder segment fault events refer to faults and abnormal operating events that occur in the feeder segment during operation and affect normal power supply, such as short circuits, grounding, overcurrent, overvoltage, and open circuits.

[0055] The handling action record corresponding to the feeder section fault event refers to the operation record formed by the handling actions (such as tripping, opening, closing the tie, restoring power, etc.) taken to resolve the fault event after the feeder section fault event occurs; the handling action record may include the handling object, handling time, handling operation type, handling result, etc.

[0056] In some embodiments, the feeder segment fault events corresponding to each feeder segment in the distribution network can be obtained by querying the story event records for a historical time period; then, based on the queried feeder segment fault events, the corresponding handling action records are determined.

[0057] In some embodiments, a feeder segment fault event may correspond to multiple feeder segment fault events, and each feeder segment fault event has a corresponding handling action record.

[0058] Step 202: For each feeder segment in the distribution network, determine the comprehensive handling capability of the feeder segment based on the feeder segment fault events and the corresponding handling action records.

[0059] Among them, the comprehensive handling capability of the feeder section refers to the ability of the feeder section to quickly restore normal operation in the event of a fault.

[0060] In some embodiments, the comprehensive handling capability of a feeder segment can be obtained by weighting the number of occurrences or frequency of feeder segment fault events with the number of successful or unsuccessful handling events recorded in the corresponding handling action records.

[0061] In other embodiments, for each feeder segment fault event, a handling score is determined based on the corresponding handling action record. Finally, the handling scores of multiple feeder segment fault events are weighted to obtain the comprehensive handling capability of the feeder segment.

[0062] Step 203: Based on the comprehensive handling capabilities of the feeder segment and the operating data of the feeder segment, determine the fault handling indicators corresponding to the feeder segment.

[0063] Among them, the operating data of the feeder segment refers to the actual operating status data of the feeder segment at the current moment; for example, the operating data may include voltage, current, power, switch status, load data, running time and environmental monitoring data, etc.

[0064] Among them, the fault handling indicators corresponding to the feeder segment are used to describe the actual fault handling capability reflected by the comprehensive handling capability of the feeder segment under the influence of the operating status indicated by the operating data of the feeder segment.

[0065] In some embodiments, a correction coefficient may be determined based on operational data, and the comprehensive handling capability may be corrected using the correction coefficient to obtain fault handling indicators.

[0066] In other embodiments, the operational data and comprehensive handling capabilities may be weighted to obtain fault handling indicators.

[0067] In some embodiments, the comprehensive handling capability may include processing capabilities in multiple dimensions. Based on this, the processing capabilities of each dimension in the comprehensive handling capability can be modified using operational data to obtain the modification result of that dimension. Finally, the modification results of multiple dimensions are weighted to obtain the fault handling index. The same operational data can be modified at different magnitudes for different dimensions of processing capabilities, thereby achieving differentiated modification of the processing capabilities of each dimension and making the fault handling index more in line with the actual operating status.

[0068] Step 204: Based on the fault handling indicators and corresponding indicator thresholds of each feeder segment in the distribution network, determine the weak feeder segments in the distribution network.

[0069] In some embodiments, a feeder segment may be identified as a weak feeder segment in the distribution network if the fault handling index corresponding to the feeder segment is less than the corresponding index threshold.

[0070] In some embodiments, the index thresholds corresponding to different feeder segments can be the same or different; the index thresholds corresponding to feeder segments can be preset or determined based on the operating data of the feeder segments. For example, multiple operating load ranges are preset, and different operating load ranges correspond to different index thresholds. Thus, the index threshold corresponding to the load range to which the operating load of the feeder segment belongs can be used as the index threshold corresponding to the feeder segment.

[0071] In some embodiments, the index threshold corresponding to a feeder segment can also be determined based on the topological location of the feeder segment in the distribution network. For example, if the topological location of the feeder segment indicates that the feeder segment is a critical power supply segment, such as the middle position, then the corresponding first index threshold is used; if the topological location of the feeder segment indicates that the feeder segment belongs to a non-critical power supply segment, such as the end position, then the corresponding second index threshold is used.

[0072] In some embodiments, the index threshold corresponding to the feeder segment can also be determined based on the number of feeder segment fault events corresponding to the feeder segment, and the specific determination method is not limited here.

[0073] The aforementioned method, apparatus, and equipment for identifying distribution network weak links based on feeder segment faults, by integrating feeder segment fault events and handling action records, can systematically characterize the handling capabilities of feeder segments during long-term operation. Simultaneously, by combining operational data and comprehensive handling capabilities to determine fault handling indicators, it enables quantitative analysis of the handling capabilities of feeder segments under current operating loads. Finally, weak feeder segments are identified through the fault handling indicators corresponding to each feeder segment. Compared to related technologies that rely solely on statistical data for distribution network weak link identification, this process combines actual operating data and long-term comprehensive handling capabilities of feeder segments to identify weak feeder segments. This transforms weak link identification from a simple historical review to a comprehensive judgment based on current and planned operating conditions, thus objectively reflecting the actual weakness of each segment and significantly improving the accuracy and reliability of distribution network weak link identification.

[0074] In one exemplary embodiment, the action log includes records of successful isolation actions, successful transfer actions, successful recovery actions, and successful re-isolation actions after recovery; such as Figure 3 As shown, step 202 includes steps 301 to 304. Wherein:

[0075] Step 301: For each feeder segment in the distribution network, determine the segment isolation capability parameters based on the number of feeder segment fault events corresponding to the feeder segment and the number of successful isolations recorded in the isolation action success record.

[0076] Isolation actions refer to operations used to electrically or physically isolate faulty areas, abnormal equipment, or dangerous circuits from the normal operating system; such as tripping, opening, etc.

[0077] The successful isolation action log records the various isolation actions taken in response to feeder segment fault events, as well as the isolation results corresponding to each isolation action.

[0078] The number of successful isolations recorded in the isolation action success log refers to the number of times that the feeder segment fault event corresponding to the feeder segment has been successfully isolated.

[0079] The segment isolation capability parameter of a feeder segment represents the level of ability to reduce the impact of faults through fault isolation.

[0080] In some embodiments, for a feeder segment fault event corresponding to a feeder segment, one or more isolation actions may be taken. For example, for a first feeder segment fault event, the corresponding isolation action success record may include "(first isolation action, failed); (second isolation action, failed); (third isolation action, successful)". Here, the isolation action success record corresponding to the feeder segment fault event refers to the isolation action success record within the time window corresponding to the feeder segment fault event, such as the isolation action success record within the first time period from the time start of the feeder segment fault event, taking the occurrence time of the feeder segment fault event as the timing start point.

[0081] Based on this, to ensure statistical consistency of different feeder segment fault events, for each feeder segment fault event, if there is an isolation action "successfully isolated" in the isolation action success record corresponding to the feeder segment fault event, the isolation success count is incremented by 1; if there is no isolation action "successfully isolated" in the isolation action success record corresponding to the feeder segment fault event, the isolation success count is not changed; where the initial value of the isolation action "successfully isolated" is 0.

[0082] In some embodiments, the ratio of the number of successful isolations to the number of feeder segment fault events can be used as a segment isolation capability parameter.

[0083] In other embodiments, the segment isolation capability parameter may be a weighted result of the number of successful isolations and the number of feeder segment fault events.

[0084] Step 302: Determine the feeder segment transfer capacity parameters based on the number of feeder segment fault events and the number of successful recovery events corresponding to the feeder segment; wherein, the number of successful recovery events is determined based on the successful transfer action records and the successful recovery action records.

[0085] Among them, the transfer operation refers to the operation used to switch the load from the abnormal circuit to the normal circuit in order to restore power supply or ensure continuous power supply; such as tie closing or transfer closing, etc.

[0086] The successful transfer action record records the various transfer actions taken in response to feeder section fault events, as well as the results of each transfer action.

[0087] Recovery actions refer to actions that restore normal power supply after a fault has been cleared; such as successful power supply, successful restoration, or successful power restoration. The recovery action success record records all types of recovery actions and their results.

[0088] The feeder segment's segmented power transfer capability parameter represents the feeder segment's ability to transfer loads and quickly restore power to non-faulty sections through power transfer.

[0089] In some embodiments, the number of successful recovery actions can be incremented by 1, based on the existence of a "successful transfer" record in the transfer action success record corresponding to the feeder segment fault event and a "successful recovery" record in the corresponding recovery action success record, thereby avoiding the situation where only a transfer action occurs but no actual power supply is restored.

[0090] Conversely, if there is no "successful transfer" transfer action in the success record of the transfer action corresponding to the feeder segment fault event, or if there is no "successful recovery" recovery action in the success record of the corresponding recovery action, the number of successful recoverys will not be changed.

[0091] In some embodiments, the ratio of the number of successful recovery attempts to the number of feeder segment fault events can be used as a segment transfer capability parameter.

[0092] In other embodiments, the weighted result of the number of successful recovery attempts and the number of feeder segment fault events can be used as the segment transfer capability parameter.

[0093] Step 303: Determine the stable power restoration capability parameters of the feeder segment based on the number of feeder segment fault events and the number of stable power restorations corresponding to the feeder segment; wherein, the number of stable power restorations is determined based on the records of successful restoration actions and the records of successful isolation actions after restoration.

[0094] Among them, the re-isolation action after recovery refers to the isolation action performed again on the same feeder segment within a preset time window after the recovery action is "successfully recovered". Obviously, if there is a re-isolation action, it means that the fault has occurred again in a short period of time, that is, the handling is unstable.

[0095] The segmented stable power restoration capability parameter of a feeder segment represents the level of ability of the feeder segment to continuously and stably restore power supply after fault handling is completed.

[0096] In some embodiments, the stable power restoration count can be incremented by 1 if the recovery action "recovery successful" exists in the recovery action success record corresponding to the feeder segment fault event and there is no re-isolation action in the corresponding recovery and re-isolation action success record; conversely, the stable power restoration count is not changed if the recovery action "recovery successful" does not exist in the recovery action success record corresponding to the feeder segment fault event, or if there is a re-isolation action in the corresponding recovery and re-isolation action success record.

[0097] In some embodiments, the ratio of the number of stable power restorations to the number of feeder segment fault events can be used as a parameter of segment stable power restoration capability.

[0098] In other embodiments, the weighted result of the number of stable power restorations and the number of feeder segment fault events can be used as the segment stable power restoration capability parameter.

[0099] Step 304: Based on the segmented isolation capability parameters, segmented power transfer capability parameters, and segmented stable power restoration capability parameters, the comprehensive handling capability of the feeder segment is obtained.

[0100] In some embodiments, the segmented isolation capability parameters, segmented power transfer capability parameters, and segmented stable power restoration capability parameters can be combined to obtain the comprehensive handling capability of the feeder segment.

[0101] In other embodiments, the comprehensive handling capability of the feeder segment can be obtained by weighting the segment isolation capability parameters, segment transfer capability parameters, and segment stable power restoration capability parameters.

[0102] For example, for each feeder segment fault event corresponding to the i-th feeder segment, the handling process data corresponding to the i-th feeder segment can be determined based on the successful isolation action record, successful transfer action record, successful recovery action record, and successful re-isolation action record after recovery corresponding to the feeder segment event, where:

[0103]

[0104] Where i represents the i-th feeder segment, whose number or index comes from the event identifier in the fault event log. This is a status variable indicating whether the fault in this feeder section has been effectively isolated, and its value is... or , The record of successful isolation actions corresponding to the feeder segment contains an event record of "successfully isolated", thus... ,otherwise .

[0105] This indicates whether the load transfer has been completed for this feeder section fault, and its value is [value missing]. or ; The record of successful transfer actions corresponding to the feeder segment shows a transfer action "transfer successful". This indicates that the recovery action record corresponding to the feeder segment contains a "recovery successful" record; that is, when and hour, ,otherwise .

[0106] This indicates whether the fault in this feeder section has been successfully restored to stable power supply; its value is... or , The record of successful re-isolation after recovery corresponding to the feeder segment does not contain any re-isolation actions. Therefore, when and hour, ,otherwise .

[0107] Through the above processing, for each feeder segment fault event corresponding to the i-th feeder segment, the processing procedure can be represented by a three-dimensional array. For example, when the associated records of a fault event simultaneously show successful segment isolation, successful interconnection and power supply transfer, and successful power restoration, and no tripping record appears after restoration, the corresponding count satisfies... , , and Thus obtain If isolation is completed without any transfer of supplies or recovery, then only ,correspond .

[0108] Thus, in the three-dimensional array corresponding to the feeder segment fault events, if the value of the first dimension is "1", the number of successful isolations is incremented by 1; if the value of the second dimension is "1", the number of successful recoverys is incremented by 1; and if the value of the third dimension is "1", the number of stable power restorations is incremented by 1. By statistically analyzing the three-dimensional array corresponding to multiple feeder segment fault events, the number of successful isolations, successful recoverys, and stable power restorations corresponding to the feeder segment can be obtained.

[0109] Then, the segmented isolation capability parameters, segmented power transfer capability parameters, and segmented stable power restoration capability parameters can be calculated using the following formulas, where:

[0110] Segmentation isolation capability parameters ; Segmented supply capacity parameters Parameters of segmented stable power restoration capability .

[0111] in, Indicates feeder segmentation; The number of feeder segment fault events corresponding to each feeder segment; , and This segment is in all events respectively , and The cumulative count, which takes a value of 1, represents the number of successful isolations, successful recoveries, and stable power restorations. This is a preset smoothing term used to suppress [the smoothing effect]. Extreme fluctuations in capability parameters at smaller times.

[0112] Finally, by combining the segmented isolation capability parameters, segmented power transfer capability parameters, and segmented stable power restoration capability parameters, the comprehensive handling capability of the feeder segment is obtained. This comprehensive handling capability can be expressed as: .

[0113] In the above embodiments, by statistically analyzing the number of fault events, successful isolation times, successful recovery times, and stable power restoration times of each feeder segment, the segment isolation capability parameters, segment power transfer capability parameters, and segment stable power restoration capability parameters are quantified. The comprehensive handling capability of the feeder segment is objectively evaluated from multiple dimensions such as fault isolation, load transfer, and stable power restoration, so that the comprehensive handling capability can accurately reflect the fault handling level of each feeder segment.

[0114] In some embodiments, based on segmented isolation capability parameters, segmented power transfer capability parameters, and segmented stable power restoration capability parameters, the comprehensive handling capability of the feeder segment is obtained, including:

[0115] Based on the minimum value among the segmented power transfer capability parameters and the segmented stable power restoration capability parameters, the consistency constraint parameters corresponding to the feeder segments are determined.

[0116] Specifically, the consistency constraint parameter can be expressed as: Where min represents the minimum value function, used to extract from... Take the minimum value from the middle. This represents the segmented supply capacity parameter; This represents the segmented stable power restoration capability parameter.

[0117] Based on the segmented isolation capability parameters and consistency constraint parameters, the composite parameters of stable handling capability corresponding to the feeder segment are determined.

[0118] For example, the composite parameter of stable handling capacity can be expressed as: .

[0119] in, Represents the segmented isolation capability parameter. This indicates the segmentation identifier of the feeder.

[0120] Understandably, by using the composite parameter of stable handling capacity, when there are significant shortcomings in power transfer or stable power restoration, taking the minimum value can constrain the composite parameter of stable handling capacity. Simultaneously, by introducing the segmented isolation capacity parameter, the composite parameter of stable handling capacity not only reflects segmented isolation capacity but also accurately reflects the limiting effect of shortcomings in power transfer or stable power restoration on the overall handling capacity, such as situations like "easy isolation, limited power transfer" or "power transfer completed but power restoration unstable."

[0121] Based on the segmented isolation capability parameters, segmented power transfer capability parameters, segmented stable power restoration capability parameters, and stable handling capability composite parameters, the comprehensive handling capability of the feeder segment is obtained.

[0122] In some embodiments, the comprehensive handling capability of a feeder segment can be obtained by combining segment isolation capability parameters, segment power transfer capability parameters, segment stable power restoration capability parameters, and stable handling capability composite parameters; for example, the comprehensive handling capability can be expressed as: .

[0123] In this embodiment, a consistency constraint parameter is constructed by taking the minimum value of the segmented power transfer capability parameter and the segmented stable power restoration capability parameter. Then, a composite parameter of stable handling capability is obtained by combining the segmented isolation capability parameter. This realizes the comprehensive handling capability of the feeder segment from multiple dimensions. It can reflect the independent performance of each handling link, as well as the constraint relationship and bottleneck effect between the power transfer and power restoration links. It avoids the problem of inflated evaluation caused by a single index being too high, and makes the evaluation result of the comprehensive handling capability more in line with the actual fault handling logic of the distribution network.

[0124] In some embodiments, based on the comprehensive handling capabilities of the feeder segment and the operating data of the feeder segment, fault handling indicators corresponding to the feeder segment are determined, including:

[0125] Based on the segmented power transfer capability parameters and segmented stable power restoration capability parameters included in the comprehensive handling capability, the unstable handling capability parameters of the feeder segment are determined.

[0126] Among them, the instability handling capability parameter of the feeder segment is used to describe the degree of difference between the segment power transfer capability parameter and the segment stable power restoration capability parameter.

[0127] For example, the absolute value of the difference between the segmented power transfer capability parameter and the segmented stable power restoration capability parameter is taken as the instability handling capability parameter of the feeder segment; that is, the instability handling capability parameter of the feeder segment can be expressed as: ;in, This represents the segmented supply capacity parameter; This represents the segmented stable power restoration capability parameter.

[0128] Based on the operational data of the feeder segment and the composite parameters of stable handling capability included in the comprehensive handling capability, the fault handling implementation condition indicators corresponding to the feeder segment are determined; among them, the fault handling implementation condition indicators are negatively correlated with the operational data.

[0129] Among them, the fault handling implementation condition index corresponding to the feeder segment is used to reflect the actual feasibility of the composite parameter of stable handling capability under actual load.

[0130] In some embodiments, the operating data of the feeder segment can be the operating load; based on this, multiple load pressure levels can be set, each load pressure level corresponding to an operating load range, so that the corresponding load pressure level can be determined first according to the operating load range to which the operating data of the feeder segment belongs, and then the fault handling implementation condition index can be obtained according to the composite parameter of load pressure level and stability handling capability.

[0131] For example, the fault handling implementation condition indicators corresponding to feeder segments can be expressed as follows: ;in, Represents a composite parameter of stable handling capacity. The relative operating load level of the feeder segment is determined by interval mapping using the operating data of the feeder segment.

[0132] Understandably, the higher the relative operating load level of a feeder section, the more... The larger the value, the lower the failure handling conditions for the feeder segment. That is, when the feeder segment is under load, various handling actions for the feeder segment are more likely to fail. Therefore, it is necessary to reduce the composite parameters of the stability handling capability.

[0133] Based on the operating data and instability handling capability parameters of the feeder segments, the penalty constraints for fault handling scenarios corresponding to the feeder segments are determined; among them, the penalty constraints for fault handling scenarios are positively correlated with the operating data.

[0134] Among them, the instability handling capability parameter of the feeder segment is used to describe the degree of difference between the segment transfer capability parameter and the segment stable power restoration capability parameter. Under high load, the greater the difference between the segment transfer capability parameter and the segment stable power restoration capability parameter, the more likely it is to occur unstable handling performance such as "transfer completed but power restoration unstable" or "power restoration can be completed but transfer link unreliable". Therefore, this difference is amplified and penalized under high load, thus better reflecting the actual risk distribution of feeder segment fault handling.

[0135] For example, the penalty constraint for the fault handling scenario corresponding to the feeder segment is expressed as follows: ;in, The relative operating load level of the feeder segment is determined by interval mapping using the operating data of the feeder segment; That is, the instability handling capability parameters of the feeder segment. This represents the segmented supply capacity parameter; This represents the segmented stable power restoration capability parameter.

[0136] The fault handling indicators corresponding to the feeder segment are obtained by weighting the implementation condition indicators and the penalty constraints of the fault handling scenario.

[0137] For example, fault handling indicators corresponding to feeder segments The calculation can be performed using the following formula:

[0138] .

[0139] in, Indicates feeder segmentation identifier, For the fault handling indicators corresponding to the feeder segments, Preset weighting coefficients are used to adjust the degree of influence of penalty constraints in fault handling scenarios on fault handling indicators; In other words, the indicators for implementing fault handling. That is, the penalty constraints for fault handling scenarios.

[0140] In the above embodiments, by using the comprehensive handling capabilities of the feeder segment and the operating data of the feeder segment, the corresponding fault handling indicators of the feeder segment are determined. This can accurately reflect the actual fault handling difficulty of the feeder segment under the current operating conditions, avoid the assessment bias caused by relying solely on a single statistical data, and improve the accuracy of the fault handling assessment of the feeder segment.

[0141] In some embodiments, before determining the weak feeder segments in the distribution network based on the fault handling indicators and corresponding indicator thresholds for each feeder segment in the distribution network, the distribution network weak link identification method based on feeder segment faults further includes:

[0142] Obtain the indicator mapping table; the indicator mapping table contains multiple indicator thresholds, and the event quantity range corresponding to each indicator threshold.

[0143] For example, in the indicator mapping table, the first indicator threshold corresponds to the first event quantity range, and the second indicator threshold corresponds to the second event quantity range.

[0144] Based on the number of feeder segment fault events corresponding to each feeder segment, data matching is performed in the indicator mapping relationship table to determine the indicator threshold corresponding to each feeder segment.

[0145] Specifically, determine the range of events to which the number of feeder segment fault events belongs, and set the threshold value corresponding to that range of events as the threshold value for the feeder segment.

[0146] In the above embodiments, the index threshold is dynamically determined based on the number of feeder segment fault events corresponding to the feeder segment, making the determined index threshold more accurate.

[0147] In some embodiments, the distribution network weak link identification method based on feeder segment faults may further include:

[0148] Obtain the disposal guidance rule table; the disposal guidance rule table contains various disposal guidance information, as well as the comprehensive disposal capacity range and operation data range corresponding to each of the various disposal guidance information.

[0149] The handling guidance information may include information such as the type of vulnerability and handling suggestions.

[0150] For example, the disposal guidance rule table may include: for the first type of disposal guidance information, corresponding to the first comprehensive disposal capacity range and the first operational data range; for the second type of disposal guidance information, corresponding to the second comprehensive disposal capacity range and the second operational data range, etc.

[0151] For weak feeder sections in the distribution network, the corresponding handling guidance information is determined by matching the corresponding operating data and comprehensive handling capabilities in the handling guidance rule table.

[0152] For example, based on the operating data corresponding to the weak feeder segment, the operating data range to which the operating data belongs is determined; based on the comprehensive handling capability corresponding to the weak feeder segment, the comprehensive handling capability range to which the comprehensive handling capability belongs is determined; finally, based on the determined operating data range and comprehensive handling capability range, the corresponding handling guidance information is determined.

[0153] In the above embodiments, based on the weak state of the weak feeder segment, the corresponding handling guidance information is determined, which enables precise handling of the weak feeder segment.

[0154] The following will illustrate this with an example application.

[0155] For feeder segments in the distribution network, identify feeder segment faults that occur during operation, and collect event records related to the handling of the fault from the existing operating system, i.e., handling action records.

[0156] During the operation of a distribution network, when a fault occurs at a segment point or section of a feeder, the operating system typically generates a clear fault event record. This record includes at least the feeder identifier and segment identifier information related to fault location, such as the segment switch number, section number, or section location result sent by the automation device. Around this fault event, using the fault occurrence time as a time reference point, an operating record window covering the entire process of isolation, transfer, and restoration is selected before and after it. Event records directly related to the feeder and segment identifier are extracted from the distribution network automation system or related operating record systems. During extraction, no additional operating parameters or irrelevant data are introduced; only the minimum set of facts that can serve as evidence of the handling process is retained, such as segment switch status change records, tie switch activation records, and successful power restoration records.

[0157] Since different operating systems may use different action codes or event descriptions for the same type of operation, in actual processing, action types in the original records can be grouped into a small number of unified categories with clear engineering meanings through pre-configured action mapping rules. For example, records indicating opening, tripping, or open positions can be uniformly grouped into isolation actions; records indicating connection closing or transfer closing can be uniformly grouped into transfer actions; and records indicating successful power supply, successful restoration, or completed power restoration can be uniformly grouped into restoration actions.

[0158] Subsequently, for each feeder segment fault event, the number of successful occurrences of various handling actions within its associated time window is counted. Based on these counts, handling process data reflecting the handling outcome is generated. The specific calculation formula is as follows:

[0159] .

[0160] For a detailed description of the formula, please refer to the foregoing embodiments, which will not be repeated here.

[0161] Using the above formula, each feeder segment fault event can generate a corresponding handling process record containing three handling states. Based on this, multiple feeder segment fault events corresponding to the same feeder segment can be combined to obtain the comprehensive handling capability of the feeder segment. That is, the comprehensive handling capability of the feeder segment can be described as... .

[0162] in, , , , .

[0163] in, Indicates feeder segmentation; The number of all feeder segment fault events belonging to this feeder segment; , and The feeder segments are divided into sections during the fault event. , and The cumulative number of times the value is 1; This is a preset smoothing term used to suppress [the smoothing effect]. The extreme fluctuations in the small-scale capability parameters are fixed in the system configuration. This parameter represents the segment isolation capability. The larger the value, the more stable the isolation of the segment is in historical segment failures. This indicates the segmented load transfer capacity parameter, reflecting the stability of the segment in completing load transfer after isolation; This parameter represents the segmented stable power restoration capability, used to describe the ability of the segment to maintain stable power supply after the handling is completed. For the composite parameters of stable treatment capacity, among which It is used to characterize the consistency constraints between power transfer and stable power restoration, so that when there is a significant weakness in a certain link, the composite capability can truly reflect the limiting effect of that weakness on the overall handling capability.

[0164] Obviously, when a certain segment consistently succeeds in isolation in the historical record, but there are significant differences in the performance of power transfer and stable power restoration, It will remain at a high level, while or The smaller value in will be passed through This method of parameter construction imposes constraints on overall capacity. It closely reflects common on-site segmented handling scenarios, such as "easy isolation, limited power transfer" or "power transfer completed but unstable power restoration," ensuring that capacity parameters not only reflect the success rate but also highlight key weaknesses in the handling process. After calculating the handling capacity parameters for all segments, the results, along with the corresponding segment identifiers, form a set of feeder segment handling capacity parameters. This serves as direct input for subsequent steps to assess the feasibility of segmented handling when introducing operational load constraints.

[0165] Subsequently, considering that the key bottleneck in handling feeder segment faults is usually not in the isolation stage, but in whether the power transfer and restoration stages can be successfully completed under load pressure, load constraints and power transfer and restoration capacity parameters can be structurally coupled.

[0166] Specifically, the operating load status data corresponding to this segment is obtained from the operating system; to ensure that subsequent calculations express "load pressure" without relying on specific units, the operating load status can be converted into a relative load level. This relative load level is obtained by mapping through the limit configuration of the operating system, and the value range is consistent with the system configuration. It is used to express how close the current load is to the upper limit of the load capacity. In engineering implementation, this conversion process can be accomplished by looking up a table: the real-time load range corresponds to a load pressure level, and is mapped to continuously selected values. This enables subsequent calculations to work stably in comparison scenarios between different feeders and different segments.

[0167] In obtaining Subsequently, considering the different sensitivities of isolation, power transfer, and stable power restoration in the power supply chain to load pressure, the following approach can be adopted: , and composite capabilities Jointly constructing a feasibility framework: Isolation capability serves as a prerequisite for handling the power supply chain, while transfer capability and stable power restoration capability are the most vulnerable links under load constraints. This is used to incorporate link consistency into the overall capability level. At the same time, to encode the engineering principle that "power transfer and restoration are more prone to failure under high load" into the indicator structure, a random variable is also introduced. The penalty term for the change is used to suppress feasibility, thereby enabling the same segment to obtain distinguishable feasibility results under different load pressures.

[0168] Specifically, the fault handling indicators corresponding to feeder segments .

[0169] For a detailed description of the formula, please refer to the relevant content in the foregoing embodiments, which will not be repeated here.

[0170] It can be seen that the first term in the formula The "segmented stable power restoration capability parameters" are multiplicatively coupled with "load pressure," which reduces feasibility when the load pressure is high; the second item This is a scenario-based penalty item used to characterize the characteristic that when the power transfer capacity and stable power restoration capacity are inconsistent, the shortcomings in handling are more easily exposed under high load conditions. This indicates the difference in capabilities between the power transfer and stable power restoration stages. The greater the difference, the more likely it is to result in unstable handling situations under high load conditions, such as "power transfer completed but power restoration unstable" or "power restoration completed but power transfer link unreliable." Therefore, this difference... Higher values ​​are penalized more, thus making the feasibility indicators more closely reflect the actual risk distribution of feeder segment fault handling.

[0171] In engineering applications, this indicator can naturally distinguish several typical segments. For segments with generally stable handling capacity and similar transfer and restoration capabilities, higher and Smaller, under medium and low load pressure Maintain a high level; when load pressure increases, Follow The load factor decreases, but the penalty does not increase significantly, reflecting that the main impact of this segment under high load conditions comes from capacity approaching its limit rather than handling link inconsistencies. For segments with high power transfer capacity but low stable power restoration capacity, The difference is relatively large, and the difference is in When the level is high, the penalty item is highlighted, making The performance decreased significantly under high-load conditions, which aligns with the on-site handling characteristic that "power restoration is more prone to recurrence under high load." For segments with historically weaker capabilities, The results are relatively low, and even with low load pressure, it is difficult to achieve higher levels. This allows for the consistent exposure of weaknesses in their handling capabilities during subsequent vulnerability identification. This is achieved after completing the feasibility indicators for phased handling. After calculation, segmented identifiers are used. To create a set of feasibility results for feeder segment fault handling, each record in the set must contain at least... With the corresponding This corresponds one-to-one with the aforementioned comprehensive handling capabilities, enabling subsequent steps to be directly implemented. It serves as a basis for identifying weaknesses, and can also be traced back to when an explanation of the cause is needed. and The corresponding processing chain characteristics.

[0172] Finally, using the fault handling indicators corresponding to each feeder segment as direct input, the fault handling indicators for each feeder segment are applied. Each segment is judged individually. A judgment threshold related to the characteristics of the segment itself is used. This transforms continuous feasibility results into clear engineering judgments. It can be pre-configured by the system, or it can be based on the number of samples to be processed corresponding to that segment. Adjustments were made to ensure that the segmentation with more comprehensive long-term operational data relies more heavily on [the following] for vulnerability assessment. The changes themselves are handled, while segments with fewer samples remain relatively robust in the judgment process, avoiding over-identification due to occasional events.

[0173] Based on this, through comparison and The size relationship is used to generate segmented weakness identification results. This is used to determine whether the segment is identified as a weak link in the distribution network under the current operating load constraints.

[0174] ;

[0175] in, Indicates feeder segmentation; Fault handling indicators corresponding to feeder segments; The threshold for determining weaknesses is set for this segment; This is the result of vulnerability identification. When When this occurs, it indicates that the handling process for that feeder section is significantly limited under the current operating load conditions, and it is identified as a weak link in the distribution network; when This indicates that the feasibility of handling this segment under the current conditions is still acceptable and does not constitute a weak link.

[0176] After identifying weak points, corresponding handling guidance information is generated for each identified weak feeder segment. This handling guidance is not a generalized suggestion, but rather focuses on the reason why this segment is identified as weak under the current conditions. For example, for The low level is mainly due to the operating load level. For load shifting caused by higher load levels, the handling guidelines focus on operational-level load transfer, operational mode adjustments, or intensive monitoring during high-load periods; for Low and simultaneously demonstrating the ability to transfer supplies. With stable power restoration capability For segments with significant differences, the handling guidelines focus on structural improvements to the stability of the power transfer link or power restoration; for For segments with generally low performance, priority will be given to providing systematic reinforcement directions at the planning level. The above guidance generation process can be achieved through rule tables, which are structured as follows: The interval in question serves as the trigger condition, and the corresponding guidance category is output to ensure a direct correspondence between the identification conclusion and the engineering response measures.

[0177] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0178] Based on the same inventive concept, this application also provides a distribution network weak link identification device for implementing the above-mentioned distribution network weak link identification method based on feeder segment faults. The solution provided by this device is similar to the implementation scheme described in the above method. Therefore, the specific limitations of one or more distribution network weak link identification device embodiments based on feeder segment faults provided below can be found in the limitations of the distribution network weak link identification method based on feeder segment faults described above, and will not be repeated here.

[0179] In one exemplary embodiment, such as Figure 4As shown, a schematic diagram of a distribution network weak link identification device based on feeder segment faults is provided. The distribution network weak link identification device 500 based on feeder segment faults includes:

[0180] The acquisition module 501 is used to acquire the corresponding feeder segment fault events for each feeder segment in the distribution network, as well as the corresponding handling action records for each feeder segment fault event.

[0181] The data statistics module 502 is used to determine the comprehensive handling capability of each feeder segment in the distribution network based on the feeder segment fault events and the corresponding handling action records.

[0182] The data processing module 503 is used to determine the fault handling indicators corresponding to the feeder segment based on the comprehensive handling capabilities of the feeder segment and the operating data of the feeder segment.

[0183] Output module 504 is used to determine the weak feeder segments in the distribution network based on the fault handling indicators and corresponding indicator thresholds of each feeder segment in the distribution network.

[0184] In one embodiment, the handling action record includes successful isolation action records, successful transfer action records, successful restoration action records, and successful re-isolation action records after restoration. The data statistics module 502 is specifically used to determine the segment isolation capability parameters for each feeder segment in the distribution network based on the number of feeder segment fault events corresponding to the feeder segment and the number of successful isolations recorded in the successful isolation action records; determine the segment transfer action capability parameters based on the number of feeder segment fault events corresponding to the feeder segment and the number of successful restorations; wherein the number of successful restorations is determined based on successful transfer action records and successful restoration action records; determine the segment stable power restoration capability parameters based on the number of feeder segment fault events corresponding to the feeder segment and the number of stable power restorations; wherein the number of stable power restorations is determined based on successful restoration action records and successful re-isolation action records after restoration; and determine the comprehensive handling capability of the feeder segment based on the segment isolation capability parameters, segment transfer action capability parameters, and segment stable power restoration capability parameters.

[0185] In one embodiment, the data statistics module 502 is specifically used to determine the consistency constraint parameters corresponding to the feeder segment based on the minimum value of the segmented power transfer capability parameters and the segmented stable power restoration capability parameters; to determine the composite parameters of the stable handling capability corresponding to the feeder segment based on the segmented isolation capability parameters and the consistency constraint parameters; and to obtain the comprehensive handling capability of the feeder segment based on the segmented isolation capability parameters, the segmented power transfer capability parameters, the segmented stable power restoration capability parameters, and the composite parameters of the stable handling capability.

[0186] In one embodiment, the data processing module 503 is specifically used to: determine the instability handling capability parameters of the feeder segment based on the segmented power transfer capability parameters and segmented stable power restoration capability parameters included in the comprehensive handling capability; determine the fault handling implementation condition indicators corresponding to the feeder segment based on the operating data of the feeder segment and the composite parameters of stable handling capability included in the comprehensive handling capability; wherein the fault handling implementation condition indicators are negatively correlated with the operating data; determine the fault handling scenario penalty constraints corresponding to the feeder segment based on the operating data and instability handling capability parameters of the feeder segment; wherein the fault handling scenario penalty constraints are positively correlated with the operating data; and perform weighted processing based on the fault handling implementation condition indicators and fault handling scenario penalty constraints corresponding to the feeder segment to obtain the fault handling indicators corresponding to the feeder segment.

[0187] In one embodiment, the distribution network weak link identification device 500 based on feeder segment faults further includes an index threshold determination module, used to obtain an index mapping relationship table; the index mapping relationship table contains multiple index thresholds and the event quantity range corresponding to each of the multiple index thresholds; based on the number of feeder segment fault events corresponding to the feeder segment, data matching is performed in the index mapping relationship table to determine the index threshold corresponding to the feeder segment.

[0188] In one embodiment, the distribution network weak link identification device 500 based on feeder segment faults further includes a handling module for obtaining a handling guidance rule table. The handling guidance rule table contains various handling guidance information, as well as the comprehensive handling capability range and operating data range corresponding to each of the various handling guidance information. For a weak feeder segment in the distribution network, the handling guidance information corresponding to the weak feeder segment is determined by matching the operating data and comprehensive handling capability corresponding to the weak feeder segment in the handling guidance rule table.

[0189] Each module in the aforementioned distribution network weak link identification device based on feeder segment faults can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0190] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 5As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores data related to vulnerability identification. The I / O interfaces are used for information exchange between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for identifying weak points in a distribution network based on feeder segmentation faults.

[0191] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0192] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the method described above.

[0193] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described above.

[0194] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the method described above.

[0195] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0196] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0197] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0198] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for identifying weak links in a distribution network based on feeder segmentation faults, characterized in that, The method includes: Obtain the corresponding feeder segment fault events for each feeder segment in the distribution network, as well as the corresponding handling action records for each feeder segment fault event; For each feeder segment in the distribution network, the comprehensive handling capability of the feeder segment is determined based on the feeder segment fault events and the corresponding handling action records. Based on the comprehensive handling capabilities of the feeder segment and the operating data of the feeder segment, the fault handling indicators corresponding to the feeder segment are determined. Based on the fault handling indicators and corresponding indicator thresholds of each feeder segment in the distribution network, the weak feeder segments in the distribution network are determined. The action records include records of successful isolation actions, successful transfer actions, successful recovery actions, and successful re-isolation actions after recovery. For each feeder segment in the distribution network, based on the feeder segment fault events and the corresponding handling action records, the comprehensive handling capability of the feeder segment is determined, including: For each feeder segment in the distribution network, the segment isolation capability parameters are determined based on the number of feeder segment fault events corresponding to the feeder segment and the number of successful isolations recorded in the isolation action success record; Based on the number of feeder segment fault events and the number of successful recovery events corresponding to the feeder segment, the segment transfer capacity parameters are determined; wherein, the number of successful recovery events is determined based on the successful transfer action records and the successful recovery action records; Based on the number of feeder segment fault events and the number of stable power restorations corresponding to the feeder segment, the stable power restoration capability parameters of the segment are determined; wherein, the number of stable power restorations is determined based on the successful records of the recovery action and the successful records of the re-isolation action after recovery; Based on the segmented isolation capability parameters, the segmented power transfer capability parameters, and the segmented stable power restoration capability parameters, the comprehensive handling capability of the feeder segment is determined.

2. The method according to claim 1, characterized in that, The comprehensive handling capability of the feeder segment, based on the segment isolation capability parameters, the segment power transfer capability parameters, and the segment stable power restoration capability parameters, includes: Based on the minimum value among the segmented power transfer capability parameters and the segmented stable power restoration capability parameters, the consistency constraint parameters corresponding to the feeder segment are determined; Based on the segmented isolation capability parameters and the consistency constraint parameters, determine the composite parameters of the stable handling capability corresponding to the feeder segment; Based on the segmented isolation capability parameters, the segmented power transfer capability parameters, the segmented stable power restoration capability parameters, and the composite parameter of stable handling capability, the comprehensive handling capability of the feeder segment is obtained.

3. The method according to claim 2, characterized in that, The determination of fault handling indicators corresponding to the feeder segment based on the comprehensive handling capability of the feeder segment and the operating data of the feeder segment includes: Based on the segmented power transfer capability parameters and segmented stable power restoration capability parameters included in the comprehensive handling capability, the unstable handling capability parameters of the feeder segment are determined. Based on the operational data of the feeder segment and the composite parameter of stable handling capability included in the comprehensive handling capability, the fault handling implementation condition index corresponding to the feeder segment is determined; wherein, the fault handling implementation condition index is negatively correlated with the operational data; Based on the operating data of the feeder segment and the instability handling capability parameters, the fault handling scenario penalty constraints corresponding to the feeder segment are determined; wherein, the fault handling scenario penalty constraints are positively correlated with the operating data; The fault handling indicators corresponding to the feeder segment are obtained by weighting the implementation condition indicators and the penalty constraints of the fault handling scenario.

4. The method according to claim 1, characterized in that, Before determining the weak feeder segments in the distribution network based on the fault handling indicators and corresponding indicator thresholds for each feeder segment in the distribution network, the method further includes: Obtain the indicator mapping relationship table; the indicator mapping relationship table contains multiple indicator thresholds, and the event quantity range corresponding to each of the multiple indicator thresholds; Based on the number of feeder segment fault events corresponding to the feeder segment, data matching is performed in the indicator mapping table to determine the indicator threshold corresponding to the feeder segment.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Obtain the disposal guidance rule table; wherein, the disposal guidance rule table contains various disposal guidance information, as well as the comprehensive disposal capability range and operation data range corresponding to each of the various disposal guidance information; For the weak feeder segments in the distribution network, the corresponding handling guidance information is determined by matching the corresponding operating data and comprehensive handling capabilities of the weak feeder segments in the handling guidance rule table.

6. A distribution network weak link identification device based on feeder segment faults, characterized in that, The device includes: The acquisition module is used to acquire the feeder segment fault events corresponding to each feeder segment in the distribution network, as well as the handling action records corresponding to each feeder segment fault event; the handling action records include isolation action success records, power transfer action success records, restoration action success records, and restoration followed by re-isolation action success records. The data statistics module is used to determine the comprehensive handling capability of each feeder segment in the distribution network based on the feeder segment fault events and the corresponding handling action records. Specifically, the data statistics module is used to determine the segment isolation capability parameter for each feeder segment in the distribution network based on the number of feeder segment fault events and the number of successful isolations recorded in the successful isolation action records. The number of successful restorations is determined based on the records of successful power transfer actions and successful restoration actions. The number of stable power restorations for each feeder segment is determined based on the number of feeder segment fault events and the number of stable power restorations. The number of stable power restorations is determined based on the records of successful restoration actions and successful isolation actions after restoration. The overall handling capacity of each feeder segment is determined based on the segment isolation capacity parameters, the segment power transfer capacity parameters, and the segment stable power restoration capacity parameters. The data processing module is used to determine the fault handling indicators corresponding to the feeder segment based on the comprehensive handling capability of the feeder segment and the operating data of the feeder segment. The output module is used to determine the weak feeder segments in the distribution network based on the fault handling indicators and corresponding indicator thresholds of each feeder segment in the distribution network.

7. The apparatus according to claim 6, characterized in that, The data statistics module is used to determine the consistency constraint parameters corresponding to the feeder segment based on the minimum value of the segmented power transfer capability parameters and the segmented stable power restoration capability parameters. Based on the segmented isolation capability parameters and the consistency constraint parameters, determine the composite parameters of the stable handling capability corresponding to the feeder segment; Based on the segmented isolation capability parameters, the segmented power transfer capability parameters, the segmented stable power restoration capability parameters, and the composite parameter of stable handling capability, the comprehensive handling capability of the feeder segment is obtained.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

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