Accurate positioning system and method for grounding fault of low-voltage transformer area

Abstract

The invention discloses a low-voltage transformer area ground fault accurate positioning system and method, and belongs to the technical field of low-voltage transformer areas, and the system comprises a data collection module which is used for collecting the monitoring real-time data of a low-voltage transformer area; the data processing module is used for processing the monitoring real-time data of the low-voltage transformer area; the model training module is used for constructing a low-voltage transformer area grounding fault accurate positioning model; the test optimization module is used for carrying out test optimization on the low-voltage transformer area grounding fault accurate positioning model; and the fault positioning module is used for accurately positioning the grounding fault of the low-voltage transformer area and determining an accurate positioning result of the grounding fault of the low-voltage transformer area. According to the invention, the problem of poor management effect of the low-voltage transformer area caused by incapability of accurately identifying and positioning the grounding fault of the low-voltage transformer area in the prior art is solved. According to the invention, the grounding fault of the low-voltage transformer area can be accurately identified and positioned, the grounding fault of the low-voltage transformer area can be timely found and maintained and managed, and the management effect of the low-voltage transformer area can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage power distribution areas, and specifically provides a precise positioning system and method for grounding faults in low-voltage power distribution areas. Background Art

[0002] A grounding fault in a low-voltage power distribution area refers to a fault where a cable or line in the low-voltage power distribution area comes into abnormal contact with the ground, causing the current to deviate from the normal path. This kind of fault not only affects the normal operation of equipment in the power distribution area but also may pose safety hazards to personnel and equipment.

[0003] Chinese Patent with Publication No. CN114678849A discloses a low-voltage power distribution area fault simulation device, which is connected in series in the low-voltage three-phase power. Through the main control module, it controls the fault implementation module and the current control module to achieve phase-to-phase short-circuit faults, short-circuit faults between each phase and the neutral point, and short-circuit faults between each phase and the ground in the low-voltage line, and controls the short-circuit time and short-circuit current of the short-circuit fault, capable of simulating and reproducing common fault types in the low-voltage power distribution area, and inversely analyzing the fault phenomena of the low-voltage lines in the power distribution area, providing the most direct data and materials for analyzing the cause of the fault, the fault evolution process, and the consequences caused by the fault. However, this patent has the following defects:

[0004] The existing ones cannot accurately identify and locate grounding faults in low-voltage power distribution areas, cannot detect grounding faults in low-voltage power distribution areas in a timely manner, and cannot carry out maintenance management on grounding faults in low-voltage power distribution areas in a timely manner, resulting in poor management effects in low-voltage power distribution areas. Summary of the Invention

[0005] The purpose of the present invention is to provide a precise positioning system and method for grounding faults in low-voltage power distribution areas, which can accurately identify and locate grounding faults in low-voltage power distribution areas, can detect grounding faults in low-voltage power distribution areas in a timely manner and carry out maintenance management on grounding faults in low-voltage power distribution areas, and can improve the management effect of low-voltage power distribution areas, solving the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A precise positioning system for grounding faults in low-voltage power distribution areas includes:

[0008] A data acquisition module, used to collect electrical data and position data of each branch node in the low-voltage power distribution area, and determine the real-time monitoring data of the low-voltage power distribution area;

[0009] A data processing module, used to process the real-time monitoring data of the low-voltage power distribution area and determine the monitoring characteristic data of the low-voltage power distribution area;

[0010] A model training module, used to construct a precise positioning model for grounding faults in the low-voltage power distribution area according to the precise positioning requirements of grounding faults in the low-voltage power distribution area;

[0011] A test optimization module for testing and optimizing the accurate grounding fault location model in a low-voltage power distribution area to determine the optimal accurate grounding fault location model in the low-voltage power distribution area;

[0012] A fault location module for accurately locating the grounding fault in the low-voltage power distribution area to determine the accurate grounding fault location result in the low-voltage power distribution area.

[0013] Preferably, the data acquisition module includes:

[0014] An electrical acquisition unit for real-time monitoring and acquisition of current, voltage and power parameters of each branch node in the low-voltage power distribution area to obtain the electrical data of the low-voltage power distribution area;

[0015] A position acquisition unit for real-time monitoring and acquisition of position parameters of each branch node in the low-voltage power distribution area to obtain the position data of the low-voltage power distribution area;

[0016] Among them, based on each branch node in the low-voltage power distribution area, an association is established between the electrical data of the low-voltage power distribution area and the position data of the low-voltage power distribution area to determine the real-time monitoring data of the low-voltage power distribution area.

[0017] Preferably, the data processing module includes:

[0018] A data cleaning unit for cleaning the real-time monitoring data of the low-voltage power distribution area;

[0019] Obtain the real-time monitoring data of the low-voltage power distribution area;

[0020] Conduct a consistency check on the real-time monitoring data of the low-voltage power distribution area;

[0021] According to the reasonable value range and mutual relationship of each parameter in the real-time monitoring data of the low-voltage power distribution area, check whether the real-time monitoring data of the low-voltage power distribution area meets the requirements;

[0022] Remove inconsistent data that exceeds the normal range, is logically unreasonable or contradictory in the real-time monitoring data of the low-voltage power distribution area;

[0023] Conduct processing on invalid values and missing values in the real-time monitoring data of the low-voltage power distribution area;

[0024] According to the validity and integrity of the data, check whether the real-time monitoring data of the low-voltage power distribution area contains invalid values and missing values;

[0025] Remove invalid values and missing values that are useless for accurately locating the grounding fault in the low-voltage power distribution area from the real-time monitoring data of the low-voltage power distribution area;

[0026] Determine the real-time monitoring data of the low-voltage power distribution area that is useful for accurately locating the grounding fault in the low-voltage power distribution area.

[0027] Preferably, the data processing module further includes:

[0028] A data conversion unit for converting real-time monitoring data of a low-voltage power distribution area;

[0029] Obtain real-time monitoring data of the low-voltage power distribution area that is useful for accurately locating the grounding fault in the low-voltage power distribution area;

[0030] Convert the real-time monitoring data of the low-voltage power distribution area that is useful for accurately locating the grounding fault in the low-voltage power distribution area;

[0031] Eliminate the dimensional difference between the real-time monitoring data of the low-voltage power distribution area that is useful for accurately locating the grounding fault in the low-voltage power distribution area, and determine the standardized real-time monitoring data of the low-voltage power distribution area;

[0032] A feature extraction unit for extracting features from the real-time monitoring data of the low-voltage power distribution area;

[0033] Obtain the standardized real-time monitoring data of the low-voltage power distribution area;

[0034] Extract features from the standardized real-time monitoring data of the low-voltage power distribution area;

[0035] Extract features that can reflect the accurate location of the grounding fault in the low-voltage power distribution area;

[0036] Determine the monitoring feature data of the low-voltage power distribution area.

[0037] Preferably, the model training module includes:

[0038] A data collection unit for collecting historical monitoring data of the low-voltage power distribution area;

[0039] Collect historical monitoring data of the low-voltage power distribution area according to the accurate location requirements of the grounding fault in the low-voltage power distribution area;

[0040] A model construction unit for constructing an accurate location model for the grounding fault in the low-voltage power distribution area;

[0041] Obtain the historical monitoring data of the low-voltage power distribution area;

[0042] Divide the historical monitoring data of the low-voltage power distribution area to determine the accurate location training set and the accurate location test set for the grounding fault in the low-voltage power distribution area;

[0043] Select a convolutional neural network model framework for accurately locating the grounding fault in the low-voltage power distribution area;

[0044] Based on the accurate location training set of the grounding fault in the low-voltage power distribution area, train the selected convolutional neural network model framework for accurately locating the grounding fault in the low-voltage power distribution area;

[0045] Determine the accurate location model for the grounding fault in the low-voltage power distribution area.

[0046] Preferably, the test optimization module includes:

[0047] A test evaluation unit for testing and evaluating the accurate grounding fault location model of the low-voltage power distribution area;

[0048] Obtain the accurate grounding fault location model of the low-voltage power distribution area;

[0049] Based on the accurate grounding fault location test set of the low-voltage power distribution area, test and evaluate the accurate grounding fault location model of the low-voltage power distribution area;

[0050] Determine the test evaluation result based on the accurate grounding fault location model of the low-voltage power distribution area;

[0051] An adjustment and optimization unit for adjusting and optimizing the accurate grounding fault location model of the low-voltage power distribution area;

[0052] Obtain the test evaluation result based on the accurate grounding fault location model of the low-voltage power distribution area;

[0053] According to the test evaluation result based on the accurate grounding fault location model of the low-voltage power distribution area, conduct mining analysis and parameter adjustment on the accurate grounding fault location model of the low-voltage power distribution area;

[0054] Determine the parameter adjustment and optimization plan based on the accurate grounding fault location model of the low-voltage power distribution area;

[0055] According to the parameter adjustment and optimization plan based on the accurate grounding fault location model of the low-voltage power distribution area, conduct parameter adjustment and iterative optimization on the accurate grounding fault location model of the low-voltage power distribution area;

[0056] Determine the optimal accurate grounding fault location model of the low-voltage power distribution area.

[0057] Preferably, the fault location module includes:

[0058] A data extraction unit for extracting the monitoring feature data of the low-voltage power distribution area;

[0059] A fault location unit for accurately locating the grounding fault of the low-voltage power distribution area;

[0060] Obtain the optimal accurate grounding fault location model of the low-voltage power distribution area;

[0061] Input the extracted monitoring feature data of the low-voltage power distribution area into the optimal accurate grounding fault location model of the low-voltage power distribution area;

[0062] Based on the optimal accurate grounding fault location model of the low-voltage power distribution area, conduct mining analysis on the monitoring feature data of the low-voltage power distribution area, identify the grounding fault of the low-voltage power distribution area and accurately locate the grounding fault of the low-voltage power distribution area;

[0063] Determine the accurate grounding fault location result of the low-voltage power distribution area.

[0064] Preferably, the fault location module further includes:

[0065] A storage and display unit for storing and displaying the accurate positioning result of the grounding fault in the low-voltage power distribution area;

[0066] Obtain the accurate positioning result of the grounding fault in the low-voltage power distribution area;

[0067] Store the accurate positioning result of the grounding fault in the low-voltage power distribution area for backup;

[0068] Display the accurate positioning result of the grounding fault in the low-voltage power distribution area to the management personnel in a visual form, so that the management personnel can perform accurate maintenance on the grounding fault in the low-voltage power distribution area according to the accurate positioning result of the grounding fault in the low-voltage power distribution area.

[0069] Preferably, for accurate maintenance of the grounding fault in the low-voltage power distribution area, the following operations are performed:

[0070] Obtain the accurate positioning result of the grounding fault in the low-voltage power distribution area;

[0071] Based on the accurate positioning result of the grounding fault in the low-voltage power distribution area, quickly find out the branch node position of the grounding fault in the low-voltage power distribution area, and perform timely maintenance on the grounding fault at the branch node position according to the grounding fault situation in the low-voltage power distribution area, so that the low-voltage power distribution area operates normally.

[0072] According to another aspect of the present invention, a method for accurately positioning a grounding fault in a low-voltage power distribution area is provided, which is implemented based on a system for accurately positioning a grounding fault in a low-voltage power distribution area as described above, and includes the following steps:

[0073] S1: Collect the electrical data and location data of the low-voltage power distribution area of each branch node in the low-voltage power distribution area, establish the association between the electrical data and location data of the low-voltage power distribution area, determine the real-time monitoring data of the low-voltage power distribution area, and process the real-time monitoring data of the low-voltage power distribution area to determine the monitoring characteristic data of the low-voltage power distribution area;

[0074] S2: According to the accurate positioning requirements of the grounding fault in the low-voltage power distribution area, construct an accurate positioning model for the grounding fault in the low-voltage power distribution area, test and optimize the accurate positioning model for the grounding fault in the low-voltage power distribution area, and determine the optimal accurate positioning model for the grounding fault in the low-voltage power distribution area;

[0075] S3: Based on the optimal accurate positioning model for the grounding fault in the low-voltage power distribution area, mine and analyze the monitoring characteristic data of the low-voltage power distribution area, identify the grounding fault in the low-voltage power distribution area and accurately position the grounding fault in the low-voltage power distribution area, and determine the accurate positioning result of the grounding fault in the low-voltage power distribution area;

[0076] S4: Display the accurate positioning result of the grounding fault in the low-voltage substation area to the management personnel in a visual form, so that the management personnel can perform accurate maintenance on the grounding fault in the low-voltage substation area based on the accurate positioning result of the grounding fault in the low-voltage substation area.

[0077] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0078] 1. By collecting the electrical data and location data of the low-voltage substation area at each branch node of the low-voltage substation area, the present invention establishes the association between the electrical data and location data of the low-voltage substation area, determines the real-time monitoring data of the low-voltage substation area, processes the real-time monitoring data of the low-voltage substation area, determines the monitoring characteristic data of the low-voltage substation area, constructs an accurate positioning model for the grounding fault in the low-voltage substation area according to the accurate positioning requirements of the grounding fault in the low-voltage substation area, tests and optimizes the accurate positioning model for the grounding fault in the low-voltage substation area, and determines the optimal accurate positioning model for the grounding fault in the low-voltage substation area, which is convenient for subsequent identification of the grounding fault in the low-voltage substation area and accurate positioning of the grounding fault in the low-voltage substation area.

[0079] 2. Based on the optimal accurate positioning model for the grounding fault in the low-voltage substation area, the present invention mines and analyzes the monitoring characteristic data of the low-voltage substation area, identifies the grounding fault in the low-voltage substation area and accurately positions the grounding fault in the low-voltage substation area, determines the accurate positioning result of the grounding fault in the low-voltage substation area, and displays the accurate positioning result of the grounding fault in the low-voltage substation area to the management personnel in a visual form, so that the management personnel can perform accurate maintenance on the grounding fault in the low-voltage substation area according to the accurate positioning result of the grounding fault in the low-voltage substation area. It can accurately identify and position the grounding fault in the low-voltage substation area, can timely detect the grounding fault in the low-voltage substation area and perform maintenance management on the grounding fault in the low-voltage substation area, and can improve the management effect of the low-voltage substation area. Description of the Drawings

[0080] Figure 1 is the structural block diagram of the accurate positioning system for the grounding fault in the low-voltage substation area of the present invention;

[0081] Figure 2 is the operation flowchart of the accurate positioning method for the grounding fault in the low-voltage substation area of the present invention. Detailed Embodiments

[0082] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0083] In order to solve the problems of the existing system that cannot accurately identify and locate the grounding faults in low-voltage power distribution areas, cannot detect the grounding faults in low-voltage power distribution areas in time, and cannot maintain and manage the grounding faults in low-voltage power distribution areas in time, resulting in poor management effect of low-voltage power distribution areas, please refer to Figure 1 - Figure 2 , the following technical solutions are provided in this embodiment:

[0084] A precise positioning system for grounding faults in low-voltage power distribution areas includes: a data acquisition module, a data processing module, a model training module, a test optimization module, and a fault positioning module.

[0085] It should be noted that through the interactive communication among the data acquisition module, the data processing module, the model training module, the test optimization module, and the fault positioning module, the grounding faults in low-voltage power distribution areas can be accurately identified and located, the grounding faults in low-voltage power distribution areas can be detected in time and maintained and managed, and the management effect of low-voltage power distribution areas can be improved.

[0086] Among them, the data acquisition module is used to collect the electrical data and location data of each branch node in the low-voltage power distribution area, and determine the real-time monitoring data of the low-voltage power distribution area;

[0087] In this embodiment, the data acquisition module includes:

[0088] The electrical acquisition unit is used to monitor and collect the current, voltage, and power parameters of each branch node in the low-voltage power distribution area in real time, and obtain the electrical data of the low-voltage power distribution area;

[0089] The location acquisition unit is used to monitor and collect the location parameters of each branch node in the low-voltage power distribution area in real time, and obtain the location data of the low-voltage power distribution area;

[0090] Among them, based on each branch node in the low-voltage power distribution area, an association between the electrical data of the low-voltage power distribution area and the location data of the low-voltage power distribution area is established, and the real-time monitoring data of the low-voltage power distribution area is determined.

[0091] Among them, the data processing module is used to process the real-time monitoring data of the low-voltage power distribution area and determine the monitoring characteristic data of the low-voltage power distribution area;

[0092] In this embodiment, the data processing module includes:

[0093] The data cleaning unit is used to clean the real-time monitoring data of the low-voltage power distribution area;

[0094] Obtain the real-time monitoring data of the low-voltage power distribution area;

[0095] Perform consistency check on the real-time monitoring data of the low-voltage power distribution area;

[0096] Check whether the real-time data of the low-voltage substation area monitoring meets the requirements according to the reasonable value ranges and mutual relationships of each parameter in the real-time data of the low-voltage substation area monitoring;

[0097] Remove the inconsistent data that exceeds the normal range, is logically unreasonable or contradictory in the real-time data of the low-voltage substation area monitoring;

[0098] Process the invalid values and missing values in the real-time data of the low-voltage substation area monitoring;

[0099] Check whether the real-time data of the low-voltage substation area monitoring contains invalid values and missing values according to the validity and integrity of the data;

[0100] Remove the invalid values and missing values that are useless for the accurate positioning of the grounding fault in the low-voltage substation area from the real-time data of the low-voltage substation area monitoring;

[0101] Determine the real-time data of the low-voltage substation area monitoring that is useful for the accurate positioning of the grounding fault in the low-voltage substation area;

[0102] A data conversion unit for converting the real-time data of the low-voltage substation area monitoring;

[0103] Obtain the real-time data of the low-voltage substation area monitoring that is useful for the accurate positioning of the grounding fault in the low-voltage substation area;

[0104] Convert the real-time data of the low-voltage substation area monitoring that is useful for the accurate positioning of the grounding fault in the low-voltage substation area;

[0105] Eliminate the dimension differences between the real-time data of the low-voltage substation area monitoring that is useful for the accurate positioning of the grounding fault in the low-voltage substation area, and determine the standardized real-time data of the low-voltage substation area monitoring;

[0106] A feature extraction unit for extracting features from the real-time data of the low-voltage substation area monitoring;

[0107] Obtain the standardized real-time data of the low-voltage substation area monitoring;

[0108] Extract features from the standardized real-time data of the low-voltage substation area monitoring;

[0109] Extract the features that can reflect the accurate positioning of the grounding fault in the low-voltage substation area;

[0110] Determine the monitoring feature data of the low-voltage substation area;

[0111] Among them, the model training module is used to construct an accurate positioning model for the grounding fault in the low-voltage substation area according to the requirements of the accurate positioning of the grounding fault in the low-voltage substation area;

[0112] In this embodiment, the model training module includes:

[0113] A data collection unit for collecting the historical data of the low-voltage substation area monitoring;

[0114] According to the precise positioning requirements of grounding faults in low-voltage power distribution areas, collect historical monitoring data of low-voltage power distribution areas;

[0115] A model construction unit for constructing a precise positioning model for grounding faults in low-voltage power distribution areas;

[0116] Obtain historical monitoring data of low-voltage power distribution areas;

[0117] Divide the historical monitoring data of low-voltage power distribution areas to determine a precise positioning training set for grounding faults in low-voltage power distribution areas and a precise positioning test set for grounding faults in low-voltage power distribution areas;

[0118] Select a convolutional neural network model framework for precise positioning of grounding faults in low-voltage power distribution areas;

[0119] Based on the precise positioning training set for grounding faults in low-voltage power distribution areas, train the selected convolutional neural network model framework for precise positioning of grounding faults in low-voltage power distribution areas;

[0120] Determine the precise positioning model for grounding faults in low-voltage power distribution areas.

[0121] Among them, a test and optimization module for testing and optimizing the precise positioning model for grounding faults in low-voltage power distribution areas to determine the optimal precise positioning model for grounding faults in low-voltage power distribution areas;

[0122] In this embodiment, the test and optimization module includes:

[0123] A test and evaluation unit for testing and evaluating the precise positioning model for grounding faults in low-voltage power distribution areas;

[0124] Obtain the precise positioning model for grounding faults in low-voltage power distribution areas;

[0125] Based on the precise positioning test set for grounding faults in low-voltage power distribution areas, test and evaluate the precise positioning model for grounding faults in low-voltage power distribution areas;

[0126] Determine the test and evaluation results based on the precise positioning model for grounding faults in low-voltage power distribution areas;

[0127] An adjustment and optimization unit for adjusting and optimizing the precise positioning model for grounding faults in low-voltage power distribution areas;

[0128] Obtain the test and evaluation results based on the precise positioning model for grounding faults in low-voltage power distribution areas;

[0129] According to the test and evaluation results based on the precise positioning model for grounding faults in low-voltage power distribution areas, conduct mining analysis and parameter adjustment on the precise positioning model for grounding faults in low-voltage power distribution areas;

[0130] Determine the parameter adjustment and optimization plan based on the precise positioning model for grounding faults in low-voltage power distribution areas;

[0131] Adjust the parameters of the precise grounding fault location model for low-voltage power distribution areas and iteratively optimize it according to the parameter adjustment and optimization scheme of the precise grounding fault location model for low-voltage power distribution areas;

[0132] Determine the optimal precise grounding fault location model for low-voltage power distribution areas.

[0133] Among them, the fault location module is used to precisely locate the grounding fault in the low-voltage power distribution area and determine the precise grounding fault location result in the low-voltage power distribution area.

[0134] In this embodiment, the fault location module includes:

[0135] The data extraction unit is used to extract the monitoring characteristic data of the low-voltage power distribution area;

[0136] The fault location unit is used to precisely locate the grounding fault in the low-voltage power distribution area;

[0137] Obtain the optimal precise grounding fault location model for the low-voltage power distribution area;

[0138] Input the extracted monitoring characteristic data of the low-voltage power distribution area into the optimal precise grounding fault location model for the low-voltage power distribution area;

[0139] Based on the optimal precise grounding fault location model for the low-voltage power distribution area, mine and analyze the monitoring characteristic data of the low-voltage power distribution area, identify the grounding fault in the low-voltage power distribution area and precisely locate the grounding fault in the low-voltage power distribution area;

[0140] Determine the precise grounding fault location result in the low-voltage power distribution area;

[0141] The storage and display unit is used to store and display the precise grounding fault location result in the low-voltage power distribution area;

[0142] Obtain the precise grounding fault location result in the low-voltage power distribution area;

[0143] Store the precise grounding fault location result in the low-voltage power distribution area for backup;

[0144] Display the precise grounding fault location result in the low-voltage power distribution area in a visual form to the management personnel, so that the management personnel can precisely maintain the grounding fault in the low-voltage power distribution area according to the precise grounding fault location result.

[0145] In this embodiment, for precise maintenance of the grounding fault in the low-voltage power distribution area, the following operations are performed:

[0146] Obtain the precise grounding fault location result in the low-voltage power distribution area;

[0147] Based on the accurate positioning result of the grounding fault in the low-voltage substation area, quickly find out the branch node position of the grounding fault in the low-voltage substation area. Based on the grounding fault situation in the low-voltage substation area, timely maintain the grounding fault at the branch node position to ensure the normal operation of the low-voltage substation area.

[0148] To better demonstrate the accurate positioning process of the grounding fault in the low-voltage substation area, this embodiment provides an accurate positioning method for the grounding fault in the low-voltage substation area, which is implemented based on the above-mentioned accurate positioning system for the grounding fault in the low-voltage substation area, and includes the following steps:

[0149] S1: Collect the electrical data and location data of the low-voltage substation area of each branch node in the low-voltage substation area, establish the association between the electrical data and location data of the low-voltage substation area, determine the real-time monitoring data of the low-voltage substation area, and process the real-time monitoring data of the low-voltage substation area to determine the monitoring characteristic data of the low-voltage substation area;

[0150] S2: According to the accurate positioning requirements of the grounding fault in the low-voltage substation area, construct an accurate positioning model for the grounding fault in the low-voltage substation area, test and optimize the accurate positioning model for the grounding fault in the low-voltage substation area, and determine the optimal accurate positioning model for the grounding fault in the low-voltage substation area;

[0151] S3: Based on the optimal accurate positioning model for the grounding fault in the low-voltage substation area, mine and analyze the monitoring characteristic data of the low-voltage substation area, identify the grounding fault in the low-voltage substation area and accurately position the grounding fault in the low-voltage substation area, and determine the accurate positioning result of the grounding fault in the low-voltage substation area;

[0152] S4: Display the accurate positioning result of the grounding fault in the low-voltage substation area to the management personnel in a visual form, so that the management personnel can accurately maintain the grounding fault in the low-voltage substation area according to the accurate positioning result of the grounding fault in the low-voltage substation area.

[0153] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0154] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low voltage area ground fault accurate positioning system, characterized in that: include: The data acquisition module is used to collect the electrical data and location data of each branch node in the low-voltage area and determine the real-time monitoring data of the low-voltage area; The data processing module is used to process the real-time data of low-voltage area monitoring and determine the characteristic data of low-voltage area monitoring; Model training module, used to build a low-voltage area grounding fault accurate positioning model according to the low-voltage area grounding fault accurate positioning requirements; The test optimization module is used to test and optimize the low-voltage area grounding fault accurate positioning model to determine the optimal low-voltage area grounding fault accurate positioning model; The fault location module is used to accurately locate the grounding fault in the low-voltage area and determine the accurate location result of the grounding fault in the low-voltage area.

2. A low voltage area ground fault accurate positioning system according to claim 1, characterized in that: The data acquisition module comprises: The electrical collection unit is used to monitor and collect the current, voltage and power parameters of each branch node of the low-voltage area in real time to obtain the electrical data of the low-voltage area; The location acquisition unit is used to monitor and collect the location parameters of each branch node in the low-voltage area in real time to obtain the location data of the low-voltage area; Among them, based on each branch node of the low-voltage substation, the association between the low-voltage substation electrical data and the low-voltage substation location data is established to determine the real-time monitoring data of the low-voltage substation.

3. A low voltage area ground fault accurate positioning system according to claim 2, characterized in that: The data processing module comprises: Data cleaning unit, used to clean the real-time data of low-voltage area monitoring; Obtain real-time data of low-voltage area monitoring; Conduct consistency checks on real-time data monitored in low-voltage areas; According to the reasonable value range and mutual relationship of each parameter in the real-time data of low-voltage area monitoring, check whether the real-time data of low-voltage area monitoring meets the requirements; Remove inconsistent data that is beyond the normal range, logically unreasonable or contradictory in the real-time data of low-voltage area monitoring; Process invalid and missing values ​​of real-time data monitored in low-voltage areas; According to the validity and completeness of the data, check whether the real-time data of low-voltage area monitoring contains invalid values ​​and missing values; Remove invalid values ​​and missing values ​​in the real-time data of low-voltage area monitoring that are useless for accurately locating low-voltage area grounding faults; Determine the real-time low-voltage area monitoring data that is useful for accurately locating low-voltage area grounding faults.

4. A low voltage area ground fault accurate positioning system according to claim 3, characterized in that: The data processing module further includes: A data conversion unit is used to convert the real-time data of low-voltage area monitoring; Obtain real-time low-voltage area monitoring data that is useful for accurate positioning of low-voltage area grounding faults; Convert the real-time data of low-voltage area monitoring that is useful for accurate positioning of low-voltage area grounding faults; Eliminate the dimensional differences between low-voltage area monitoring real-time data that are useful for accurate positioning of low-voltage area grounding faults, and determine standardized low-voltage area monitoring real-time data; A feature extraction unit is used to extract features from real-time data of low-voltage area monitoring; Obtain standardized real-time data for low-voltage area monitoring; Extract features from standardized real-time data of low-voltage area monitoring; Extract features that can reflect the accurate location of grounding faults in low-voltage areas; Determine the monitoring characteristic data of the low-voltage area.

5. A low voltage area ground fault accurate positioning system according to claim 4, characterized in that: The model training module includes: A data collection unit is used to collect historical data of low-voltage area monitoring; According to the demand for accurate positioning of ground faults in low-voltage areas, historical monitoring data of low-voltage areas are collected; Model building unit, used to build a low-voltage area ground fault accurate positioning model; Obtain historical data of low voltage area monitoring; The historical data of low-voltage area monitoring is divided to determine the training set for accurate positioning of low-voltage area grounding faults and the test set for accurate positioning of low-voltage area grounding faults; Select the convolutional neural network model framework for accurate positioning of ground faults in low-voltage substations; Based on the low-voltage substation grounding fault accurate location training set, the selected convolutional neural network model framework for low-voltage substation grounding fault accurate location is trained; Determine the accurate positioning model of grounding faults in low-voltage substations.

6. A low voltage area ground fault accurate positioning system according to claim 5, characterized in that: The test optimization module comprises: Test and evaluation unit, used to test and evaluate the accurate positioning model of low-voltage area ground faults; Obtain accurate positioning model of ground fault in low voltage area; Based on the low-voltage area ground fault accurate location test set, the low-voltage area ground fault accurate location model is tested and evaluated; Determine the test evaluation results based on the low-voltage area ground fault accurate location model; Adjustment and optimization unit, used to adjust and optimize the low-voltage substation ground fault accurate positioning model; Obtain test evaluation results based on the low-voltage area ground fault accurate location model; According to the test and evaluation results based on the low-voltage area grounding fault accurate positioning model, the low-voltage area grounding fault accurate positioning model is mined and analyzed and parameters are adjusted; Determine the parameter adjustment optimization scheme based on the low-voltage area ground fault accurate positioning model; According to the parameter adjustment optimization scheme based on the low-voltage area grounding fault accurate positioning model, the parameters of the low-voltage area grounding fault accurate positioning model are adjusted and iteratively optimized; Determine the optimal low-voltage substation grounding fault accurate positioning model.

7. A low voltage area ground fault accurate positioning system according to claim 6, characterized in that: The fault location module comprises: A data extraction unit, used to extract low-voltage area monitoring characteristic data; Fault location unit, used to accurately locate ground faults in low-voltage areas; Obtain the optimal low-voltage area ground fault accurate positioning model; The extracted low-voltage area monitoring characteristic data is input into the optimal low-voltage area grounding fault accurate positioning model; Based on the optimal low-voltage area grounding fault accurate positioning model, the low-voltage area monitoring feature data is mined and analyzed to identify the low-voltage area grounding fault and accurately locate the low-voltage area grounding fault; Determine the precise positioning results of the low-voltage substation grounding fault.

8. A low voltage area ground fault accurate positioning system according to claim 7, characterized in that: The fault location module further includes: Storage and display unit, used to store and display the precise positioning results of low-voltage area grounding faults; Obtain accurate positioning results of ground faults in low-voltage areas; The accurate positioning results of low-voltage area grounding faults are stored for backup; The precise positioning results of low-voltage area grounding faults are displayed to management personnel in a visual form, so that management personnel can perform precise maintenance on low-voltage area grounding faults based on the precise positioning results of low-voltage area grounding faults.

9. A low voltage area ground fault accurate positioning system according to claim 8, characterized in that: To perform precise maintenance on low voltage area grounding faults, perform the following operations: Obtain accurate positioning results of ground faults in low-voltage areas; Based on the precise positioning results of the low-voltage substation grounding fault, the branch node location of the low-voltage substation grounding fault is quickly found. Based on the low-voltage substation grounding fault situation, the grounding fault at the branch node location is promptly maintained to ensure the normal operation of the low-voltage substation.

10. A method for accurately locating a low-voltage area grounding fault, implemented based on the low-voltage area grounding fault accurate positioning system according to claim 9, characterized in that: The steps include: S1: Collect low-voltage area electrical data and low-voltage area location data of each branch node of the low-voltage area, establish the association between the low-voltage area electrical data and the low-voltage area location data, determine the low-voltage area monitoring real-time data, process the low-voltage area monitoring real-time data, and determine the low-voltage area monitoring characteristic data; S2: According to the demand for accurate positioning of ground faults in low-voltage substations, a model for accurate positioning of ground faults in low-voltage substations is constructed, and the model for accurate positioning of ground faults in low-voltage substations is tested and optimized to determine the optimal model for accurate positioning of ground faults in low-voltage substations; S3: Based on the optimal low-voltage area grounding fault accurate positioning model, the low-voltage area monitoring feature data is mined and analyzed to identify the low-voltage area grounding fault and accurately locate the low-voltage area grounding fault, and determine the low-voltage area grounding fault accurate positioning result; S4: The precise positioning results of the low-voltage area grounding fault are displayed to the management personnel in a visual form, so that the management personnel can perform precise maintenance on the low-voltage area grounding fault based on the precise positioning results of the low-voltage area grounding fault.

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