Method and device for evaluating health state of circuit group of relay protection device

Abstract

The invention relates to the technical field of relay protection device evaluation, and discloses a health state evaluation method and device for a relay protection device line group, and the method comprises the steps: collecting the parameter data of a related relay protection device in the relay protection device line group, and enabling the parameter data to comprise an electrical parameter and an environment parameter; determining a state score of the relay protection device according to the parameter data of the relay protection device; determining a reliability score of the relay protection device according to the state score of the relay protection device; determining a health state score of the relay protection device line group according to the reliability score of the relay protection device; and determining a maintenance scheme of the relay protection device line group according to the reliability score of the relay protection device and the health state score of the relay protection device line group.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relay protection device evaluation, and particularly relates to a health state evaluation method and device for a relay protection device line group. BACKGROUND

[0002] In a power system, a relay protection device is a key equipment for safe and stable operation of the power system, and its healthy operation is crucial for guaranteeing safe operation of a line. At present, the health state evaluation method for the relay protection device is mostly based on a single parameter or a small amount of parameters, and it is difficult to comprehensively and accurately reflect the real health state of the relay protection device, for example, misjudgment or missed judgment of a line fault may occur, affecting safe and stable operation of the power system. In addition, in the related art, the health state of a single relay protection device is usually evaluated, and potential risks may occur when multiple relay protection devices are jointly operated, and these potential risks may be difficult to be discovered and processed in time, thereby affecting safe and stable operation of the entire power system. Furthermore, in the related art, a fixed periodical inspection method is generally used to inspect a line group containing a relay protection device in the power system to evaluate the health state of the relay protection device, which may cause over-inspection and waste of resources, or may cause insufficient frequency of inspection and difficulty in discovering potential risks of the line group in time. SUMMARY

[0003] The present application aims to at least solve the technical problems in the related art that the health state evaluation method for the relay protection device is single and simple, and it is difficult to comprehensively and accurately evaluate the health state of the relay protection device of the power system, affecting safe and stable operation of the power system, and resources are wasted during evaluation.

[0004] To solve the above technical problems, an embodiment of the present application provides a health state evaluation method for a relay protection device line group, comprising:

[0005] Collecting parameter data of related relay protection devices in the relay protection device line group, wherein the parameter data comprises electrical parameters and environmental parameters;

[0006] Determining a state score of the relay protection device according to the parameter data of the relay protection device;

[0007] Determining a reliability score of the relay protection device according to the state score of the relay protection device;

[0008] Determining a health state score of the relay protection device line group according to the reliability score of the relay protection device;

[0009] Determining a maintenance scheme for the relay protection device line group according to the reliability score of the relay protection device and the health state score of the relay protection device line group.

[0010] In some embodiments, determining the state score of the relay protection device according to the parameter data of the relay protection device comprises:

[0011] normalizing the parameter data, and extracting parameter features from the normalized parameter data;

[0012] inputting the parameter features into a preset state score model of the relay protection device to obtain the state score of the relay protection device.

[0013] In some embodiments, determining the reliability score of the relay protection device according to the state score of the relay protection device comprises:

[0014] weighting the usage data of the relay protection device and the state score of the relay protection device to determine the reliability score of the relay protection device;

[0015] wherein the usage data of the relay protection device comprises at least one of a service life of the relay protection device, a number of correct actions of the relay protection device within a preset time, and a time from a last maintenance of the relay protection device.

[0016] In some embodiments, the method further comprises:

[0017] determining the reliability score of the relay protection device according to the state score of the relay protection device and historical data of the relay protection device;

[0018] wherein the reliability score formula of the relay protection device is:

[0019] ,

[0020] ,

[0021] ,

[0022] ,

[0023] wherein, represents the reliability score of the relay protection device, represents the overage usage rate of the relay protection device, represents the service life of the relay protection device, represents the average service life of the relay protection device, represents the correct action probability of the relay protection device, and respectively represent the number of correct actions and the total number of actions of the relay protection device within a certain period of time, represents the overage maintenance rate of the relay protection device, represents the time from the last maintenance of the relay protection device, represents the average time before the first failure of the relay protection device after maintenance, represents the state score of the relay protection device, represents the last reliability score of the relay protection device, respectively represent the weight coefficients.

[0024] In some embodiments, the health status score of the relay protection device line group is determined according to the reliability score of the relay protection device, comprising:

[0025] The reliability scores of the relay protection devices in the relay protection device line group are weighted and summed to obtain the health status score of the relay protection device line group;

[0026] The calculation formula of the health status score is:

[0027]

[0028] wherein, represents the health status score of the entire relay protection device line group, represents the i-th relay protection device in the line group, represents the weight coefficient of the i-th relay protection device, represents the reliability score of the i-th relay protection device.

[0029] In some embodiments, the maintenance scheme of the relay protection device line group is determined according to the reliability score of the relay protection device and the health status score of the relay protection device line group, comprising:

[0030] The maintenance level of the relay protection device is determined according to the reliability score of the relay protection device;

[0031] The relay protection device is scheduled for maintenance according to the maintenance level of the relay protection device;

[0032] It is determined whether to maintain the relay protection device line group according to the health status score of the relay protection device line group.

[0033] In some embodiments, the maintenance level of the relay protection device includes an immediate maintenance level, a planned maintenance level, and an evaluation level,

[0034] The relay protection device is scheduled for maintenance according to the maintenance level of the relay protection device, comprising:

[0035] ​If the maintenance level of the relay protection device is the immediate maintenance level, the relay protection device is arranged for maintenance;

[0036] If the maintenance level of the relay protection device is the planned maintenance level, the latest maintenance deadline of the relay protection device is calculated, and the relay protection device is arranged for maintenance according to the maintenance deadline;

[0037] If the maintenance level of the relay protection device is the evaluation level, the evaluation cycle of the next reliability score of the relay protection device is calculated.

[0038] In some embodiments, whether to perform maintenance on the relay protection device line group according to the health state score of the relay protection device line group includes:

[0039] If the health state score of the relay protection device line group is greater than or equal to a preset score threshold, the relay protection device line group does not need to be maintained;

[0040] If the health state score of the relay protection device line group is less than the preset score threshold, the relay protection devices in the relay protection device line group are sequentially maintained according to the reliability score ranking result of each relay protection device in the relay protection device line group.

[0041] In some embodiments, the electrical parameters include at least one of current data, voltage data, frequency data, and phase angle data, and the environmental parameters include at least one of temperature data, humidity data, and air pressure data;

[0042] The historical data of the relay protection device includes at least one of the average service life, the service life, the historical score, the action record, and the maintenance record of the relay protection device.

[0043] The embodiments of the present application also provide a health state evaluation device of a relay protection device line group, which includes:

[0044] A collection module configured to collect parameter data of related relay protection devices in a relay protection device line group, wherein the parameter data includes electrical parameters and environmental parameters;

[0045] A relay protection device state scoring module configured to determine a state score of the relay protection device according to the parameter data of the relay protection device;

[0046] A relay protection device reliability scoring module configured to determine a reliability score of the relay protection device according to the state score of the relay protection device;

[0047] a line group health state score module configured to determine a health state score of the line group of the relay protection device according to the reliability score of the relay protection device;

[0048] a maintenance scheme determination module configured to determine a maintenance scheme of the line group of the relay protection device according to the reliability score of the relay protection device and the health state score of the line group of the relay protection device.

[0049] The embodiment of the present application further provides an electronic device comprising at least a memory and a processor, wherein the memory stores a computer program, and the processor implements the health state evaluation method of the line group of the relay protection device when executing the computer program stored in the memory.

[0050] The embodiment of the present application further provides a computer readable storage medium storing a computer program, wherein the computer program is executed by a processor to implement the health state evaluation method of the line group of the relay protection device.

[0051] The health state evaluation method and device of the line group of the relay protection device provided by the embodiment of the present application can comprehensively consider various parameter data affecting the state of the relay protection device and the linkage of different relay protection devices in the line group of the relay protection device, comprehensively and accurately evaluate the health state of the line group of the relay protection device, improve the safety and reliability of the power system operation, and reasonably determine the maintenance scheme of the line group of the relay protection device according to the reliability score of the relay protection device and the health state score of the line group of the relay protection device, so as to timely discover and handle potential risks in the operation of the power system and avoid resource waste caused by excessive maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0053] Figure 1 A flow chart of a health state evaluation method of a line group of a relay protection device according to an embodiment of the present application;

[0054] Figure 2 Another flow chart of a health state evaluation method of a line group of a relay protection device according to an embodiment of the present application;

[0055] Figure 3 A state score determination schematic diagram of a relay protection device according to an embodiment of the present application;

[0056] Figure 4 A maintenance scheme determination schematic diagram according to an embodiment of the present application;

[0057] Figure 5 A structure schematic diagram of a health state evaluation device of a line group of a relay protection device according to an embodiment of the present application. DETAILED DESCRIPTION

[0058] The various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0059] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be construed as limiting, but merely as exemplification of the embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.

[0060] The accompanying drawings incorporated in and forming a part of the specification, illustrate embodiments of the present application and, together with the general description of the application given above, and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0061] These and other characteristics of the present application will become apparent from the following description of the preferred forms given, by way of non-limiting example only, with reference to the attached drawings.

[0062] It is also to be understood that even though a few forms of the present application have been exemplified and described herein, all other equivalent forms which are within the scope of the present application are intended to be encompassed by the following claims.

[0063] The above and other aspects, features, and advantages of the present application will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, when properly considered together.

[0064] Specific embodiments of the application are described herein with reference to the drawings; however, it will be understood that the application is not limited to the specific embodiments described herein, but can be practiced with modification and alteration within the scope and spirit of the present application. Accordingly, the specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and a representative basis for teaching one skilled in the art to variously employ the present application.

[0065] The specification can use phrases such as "in one embodiment", "in another embodiment", "in yet another embodiment", or "in other embodiments", which can refer to one or more of the same or different embodiments of the application.

[0066] At present, the health running state evaluation method of the relay protection device is mainly based on single parameter or a small amount of parameters, for example, only considering electrical parameters such as current and voltage, and ignoring the comprehensive influence of time and space multi-parameters. When judging the line fault, it may lead to misjudgment or missed judgment due to not considering the load change law in different time periods and the special situation of different positions of the line.

[0067] In addition, the related health running state evaluation method of the relay protection device mainly focuses on the performance evaluation of a single device, and has not yet formed a perfect evaluation system to comprehensively evaluate the health state of multiple relay protection devices in joint operation. This single relay protection device evaluation method may lead to potential hidden dangers when multiple devices act jointly, and these hidden dangers may be difficult to be discovered and handled in time, thereby affecting the safe and stable operation of the entire power system.

[0068] In addition, the current general inspection method is fixed cycle inspection or based on some simple experience to evaluate the health running state of the relay protection device. When the health state of the relay protection line group is in good condition, the fixed cycle inspection may lead to over-inspection, thereby causing waste of resources. On the contrary, if the state of the relay protection line group is not good, but still based on simple experience to determine the inspection cycle for inspection, it may lead to insufficient frequency of inspection, and it is difficult to discover potential risks in time. In this way, it increases the risk of failure of the power system, and affects the stable operation of the entire power system.

[0069] As can be seen from the above, in order to ensure the safe and stable operation of the power system, it is necessary to more scientifically and reasonably evaluate and inspect the health running state of the relay protection device, discover potential risks in time and accurately, and avoid waste of resources.

[0070] Therefore, the embodiment of the present application provides a health state evaluation method, device, electronic equipment and storage medium for a line group of a relay protection device.

[0071] Embodiment one

[0072] Figure 1 A flowchart of the health state evaluation method for a line group of a relay protection device is shown. As shown in the flowchart, the embodiment of the present application provides a health state evaluation method for a line group of a relay protection device, which comprises the following steps. Figure 1

[0073] S101: Collecting parameter data of related relay protection devices in a line group of a relay protection device.

[0074] The parameter data comprises electrical parameters and environmental parameters, the electrical parameters comprise at least one of current data, voltage data, frequency data and phase angle data, and the environmental parameters comprise at least one of temperature data, humidity data and air pressure data. The operation of a relay protection device is not only affected by its own electrical parameters, but also by surrounding environmental parameters. Therefore, in this step, the electrical parameters and environmental parameters of related relay protection devices in a line group of a relay protection device are collected simultaneously.

[0075] In a specific implementation, the real-time electrical parameters and environmental parameters of related relay protection devices in a relay protection line group (line group for short) within 5 minutes can be collected at a preset collection frequency, so as to obtain real-time parameter data of each relay protection device in the relay protection line group. The collection frequency is, for example, 32 times per second. The related relay protection devices in the relay protection device line group can be relay protection devices of the same type or relay protection devices of different types.

[0076] S102: Determining a state score of the relay protection device according to the parameter data of the relay protection device.

[0077] After collecting the parameter data of the relay protection device, the collected parameter data can be calculated by using a deep learning algorithm to score the current state of the relay protection device in the line group, so as to obtain the state score of the relay protection device.

[0078] S103: Determining a reliability score of the relay protection device according to the state score of the relay protection device.

[0079] After determining the state score of each relay protection device in the relay protection line group, the reliability of each relay protection device is scored according to the state score of the relay protection device, so as to obtain the reliability score of each relay protection device.

[0080] ​S104: determining a health status score of the relay protection device line group according to the reliability score of the relay protection device.

[0081] After determining the reliability score of each relay protection device, the health status score of the entire relay protection device line group is calculated according to the reliability score of each relay protection device, the health status of the entire relay protection device line group is scored, and the health status score of the relay protection device line group is obtained. In this embodiment, various types of parameter data of the relay protection device can be collected in real time, the reliability score of the relay protection device is comprehensively and accurately scored according to the various types of parameter data, then the reliability scores of the relay protection devices are combined to score the health status of the entire relay protection device line group. Not only the various parameter data of each relay protection device are comprehensively considered, but also the interaction and synergistic effect among the multiple relay protection devices are comprehensively considered, so that potential risks that may occur when the relay protection devices in the relay protection device line group act (including when a single relay protection device acts and when multiple relay protection devices jointly act) can be found and handled in time, and the safe and stable operation of the power system is ensured.

[0082] S105: determining a maintenance scheme of the relay protection device line group according to the reliability score of the relay protection device and the health status score of the relay protection device line group.

[0083] After determining the health status score of the entire relay protection device line group, the maintenance scheme of the relay protection device line group can be determined according to the health status score, for example, the maintenance cycle of the relay protection device line group is planned, the maintenance cycle is evaluated, the relay protection devices are scheduled for maintenance, or the corresponding maintenance mode is determined for a specific relay protection device. After the maintenance scheme is determined, the relay protection device line group can be maintained according to the maintenance scheme, and potential risks of the line group can be found and handled in time.

[0084] According to the reliability score of the relay protection device and the health status score of the relay protection device line group, a reasonable maintenance scheme of the relay protection device line group is determined, which can avoid the waste of resources caused by excessive inspection, and can also avoid the problem that the inspection frequency is insufficient and the potential risks of the line group are difficult to find in time.

[0085] In this embodiment, during the maintenance of the relay protection device line group according to the maintenance scheme, the health status of the relay protection device line group can be further scored according to the maintenance result, the comprehensive and accurate dynamic evaluation of the relay protection device line group is realized, and the health status evaluation accuracy of the relay protection device line group is further improved.

[0086] The health status evaluation method for relay protection device line groups provided in this application collects parameter data of relevant relay protection devices in the relay protection device line group, wherein the parameter data includes electrical parameters and environmental parameters; determines the status score of the relay protection device based on the parameter data of the relay protection device; determines the reliability score of the relay protection device based on the status score of the relay protection device; determines the health status score of the relay protection device line group based on the reliability score of the relay protection device; and determines the maintenance plan for the relay protection device line group based on the reliability score of the relay protection device and the health status score of the relay protection device line group. This method comprehensively considers various parameter data affecting the status of relay protection devices, as well as the linkage of different relay protection devices in the relay protection device line group, to comprehensively and accurately assess the health status of the relay protection device line group, thereby improving the safety and reliability of power system operation. Furthermore, it can reasonably determine the maintenance plan for the relay protection device line group based on the reliability score of the relay protection device and the health status score of the relay protection device line group, promptly identifying and addressing potential risks during power system operation, and avoiding resource waste caused by excessive maintenance.

[0087] In some embodiments, such as Figure 3 As shown, in step S102, determining the status score of the relay protection device based on its parameter data includes:

[0088] S1021: Normalize the parameter data and extract parameter features from the normalized parameter data;

[0089] S1022: Input the parameter features into the preset relay protection device status scoring model to obtain the status score of the relay protection device.

[0090] like Figure 3 As shown, steps S1021 and S1022 involve first normalizing the collected parameter data, then extracting the corresponding parameter features, and finally concatenating these features. When normalizing the parameter data, data collected every 10 seconds can be grouped into one row, resulting in parameter data with a dimension of (30, 320). The concatenated parameter features are then input into a preset relay protection device status scoring model to calculate the status score of the relay protection device. The status score is between [0, 100]. The relay protection device status scoring model includes an encoding layer and a decoding layer. The encoding layer converts the input parameter features into semantic representations and processes the parameter features; the decoding layer generates target data based on the output of the encoding layer and outputs it. In this embodiment, the decoding layer outputs the status score of the relay protection device.

[0091] In some embodiments, in step S103, a reliability score of the relay protection device is determined according to the state score of the relay protection device, including:

[0092] S1031: The reliability score of the relay protection device is determined by weighting the state score of the relay protection device and the usage data of the relay protection device.

[0093] In this step, the state score of the relay protection device and the usage score obtained according to the usage data of the relay protection device are weighted and summed to obtain the reliability score of the relay protection device.

[0094] Optionally, the usage data of the relay protection device includes at least one of a service life of the relay protection device, a number of correct actions of the relay protection device within a preset time, and a time from a last maintenance of the relay protection device.

[0095] The reliability score of the relay protection device is determined by weighting the state score of the relay protection device and the usage data of the relay protection device.

[0096] ,

[0097] ,

[0098] ,

[0099] ,

[0100] wherein, represents the reliability score of the relay protection device, represents an overage usage rate of the relay protection device, represents a service life of the relay protection device, represents an average service life of the relay protection device, represents a correct action probability of the relay protection device, and respectively represent a number of correct actions and a total number of actions of the relay protection device within a certain period, represents an overage maintenance rate of the relay protection device, represents a time from a last maintenance of the relay protection device, represents an average time before a first failure of the relay protection device after maintenance, represents the state score of the relay protection device, respectively represent weight coefficients.

[0101] In some embodiments, as shown in Figure 2 the method further includes:

[0102] S201: Determine the reliability score of the relay protection device based on the status score and historical data of the relay protection device.

[0103] In this step, historical data of relevant relay protection devices in the relay protection line group can be collected, and the historical data can be combined with the status score of the relay protection device to obtain the reliability score of the relay protection device, so as to more accurately score the reliability of the relay protection device.

[0104] In this context, the historical data of the relay protection device includes at least one of the following: average service life, service life, historical rating, operation record, and maintenance record.

[0105] The reliability scoring formula for the relay protection device, determined based on its status score and historical data, is as follows:

[0106] ,

[0107] ,

[0108] ,

[0109] ,

[0110] in, This indicates the reliability score of the relay protection device. This indicates the overdue service rate of relay protection devices. Indicates the service life of the relay protection device. This indicates the average service life of this type of relay protection device. This indicates the probability of the relay protection device operating correctly. and These represent the number of correct operations and the total number of operations of the relay protection device, respectively, within a certain period. This indicates the overdue maintenance rate of relay protection devices. This indicates the time since the last maintenance of the relay protection device. This indicates the average time before the first fault occurs after maintenance for this type of relay protection device. This indicates the status score of the relay protection device. This indicates the previous reliability score of the relay protection device. These represent the weighting coefficients.

[0111] Preferably, the above-mentioned weighting coefficients The values ​​are dynamically assigned. For example, the calculation formulas for each weight coefficient are as follows:

[0112]

[0113]

[0114]

[0115]

[0116]

[0117] In this embodiment, the reliability score of the relay protection device is calculated by dynamically assigning weights, which fully considers the importance of various reliability evaluation indicators under different conditions. Compared with the traditional fixed weights, this application is more comprehensive and the dynamically assigned weights are more reasonable, which can obtain a more accurate and reasonable reliability score of the relay protection device.

[0118] In some embodiments, step S104, determining the health status score of the relay protection device line group based on the reliability score of the relay protection device, includes:

[0119] S1041: The reliability scores of each relay protection device in the relay protection device line group are weighted and summed to obtain the health status score of the relay protection device line group.

[0120] The formula for calculating the health status score is as follows:

[0121] ,

[0122] in, This indicates the health status score of the entire relay protection device circuit group. This represents the i-th relay protection device in the line group. This represents the weighting coefficient of the i-th relay protection device. This represents the reliability score of the i-th relay protection device.

[0123] In some embodiments, such as Figure 4 As shown, in step S105, the maintenance plan for the relay protection device line group is determined based on the reliability score of the relay protection device and the health status score of the relay protection device line group, including:

[0124] S1051: Determine the maintenance level of the relay protection device based on its reliability score;

[0125] S1052: Schedule the maintenance of the relay protection device according to its maintenance level;

[0126] S1053: Determine whether to perform maintenance on the relay protection device line group based on the health status score of the relay protection device line group.

[0127] In this embodiment, the maintenance level of the relay protection device can be divided into different levels according to the reliability score of the relay protection device. For example, if the reliability score is [0, 65], the maintenance level is determined to be the immediate maintenance level, that is, the reliability of the relay protection device is low and it needs to be maintained in a timely manner; if the reliability score is (65, 80], the maintenance level is determined to be the planned maintenance level, that is, the reliability of the relay protection device is medium and it can be maintained according to the plan; if the reliability score is (80, 100], the maintenance level is determined to be the evaluation level, that is, the reliability of the relay protection device is high and it can be evaluated whether to carry out maintenance first.

[0128] After determining the maintenance level of the relay protection device, maintenance schedules are made according to the corresponding maintenance level. Relay protection devices that require immediate maintenance are promptly maintained, and when the reliability of the relay protection device is high, it is determined that the relay protection device is operating well and does not require maintenance.

[0129] In this embodiment, not only can each relay protection device be individually inspected based on its reliability score, but the health status score of the relay protection device line group can also be used to determine whether the entire relay protection device line group needs to be inspected. This enables targeted inspection of the relay protection device line group, timely and accurate detection and handling of potential hazards, while avoiding over-inspection and waste of resources.

[0130] In some embodiments, such as Figure 4 As shown, in step S1052, the maintenance schedule for the relay protection device is arranged according to its maintenance level, including:

[0131] S301: If the maintenance level of the relay protection device is the immediate maintenance level, make maintenance arrangements for the relay protection device;

[0132] S302: If the maintenance level of the relay protection device is the planned maintenance level, calculate the latest maintenance period of the relay protection device, and schedule the maintenance of the relay protection device according to the maintenance period;

[0133] S303: If the maintenance level of the relay protection device is the evaluation level, calculate the evaluation cycle for the next reliability rating of the relay protection device.

[0134] If the maintenance level of the relay protection device is immediate maintenance, maintenance should be arranged as soon as possible;

[0135] If the maintenance level of the relay protection device is the planned maintenance level, then its latest maintenance period needs to be calculated. The calculation formula is as follows:

[0136] ,

[0137] in, This indicates the latest maintenance deadline for the relay protection device. This indicates the reliability score of the relay protection device since its last maintenance.

[0138] If the maintenance level of the relay protection device is assessment level, then the next assessment cycle for reliability scoring is calculated using the following formula:

[0139] ,

[0140] in, This indicates the evaluation cycle for the next reliability rating of the relay protection device.

[0141] In this embodiment, when the maintenance level of the relay protection device is the immediate maintenance level or the planned maintenance level, it can ensure that the relay protection device is properly maintained and avoid failure of the relay protection device due to overdue maintenance; and when the maintenance level of the relay protection device is the evaluation level, it can reduce the frequency of reliability evaluation of the relay protection device, reduce the amount of data processing, improve data processing efficiency, and reduce resource waste.

[0142] In some embodiments, step S1053, determining whether to perform maintenance on the relay protection device line group based on the health status score of the relay protection device line group, includes:

[0143] S401: If the health status score of the relay protection device line group is greater than or equal to the preset score threshold, then it is not necessary to inspect the relay protection device line group.

[0144] S402: If the health status score of the relay protection device line group is less than the preset score threshold, the relay protection devices in the relay protection device line group are inspected in sequence according to the reliability score ranking results of each relay protection device in the relay protection device line group.

[0145] like Figure 4As shown, when determining whether a relay protection device line group needs maintenance based on its overall health status score, if the health status score is greater than or equal to a preset threshold, maintenance is not required. If the health status score is less than the preset threshold, the reliability of each relay protection device in the line group is ranked according to its reliability score. Then, the relay protection devices in the line group are maintained sequentially according to the ranking result. Relay protection devices with lower reliability scores have higher ranking positions. During maintenance, relay protection devices with higher ranking positions (lower reliability scores) are prioritized for maintenance to avoid affecting the safe operation of the entire relay protection device line group.

[0146] The maintenance sequencing formula is as follows:

[0147] ,

[0148] Among them, P i This represents the ranking score (weighted reliability score) of the i-th relay protection device. This represents the reliability score of the i-th relay protection device. This represents the weighting coefficient of the i-th relay protection device.

[0149] According to the ranking score (P) i The relay protection devices are sorted from smallest to largest. After each relay protection device is repaired, the reliability score of the repaired relay protection device and the health status score of the relay protection device line group are calculated. Based on the new health status score, it is assessed whether to continue the repair, so as to realize the continuous assessment of the health status of the relay protection device line group.

[0150] In summary, this application, without affecting the safe operation of the line, accurately assesses the healthy operating status of relay protection line groups by establishing a multi-parameter mathematical model and comprehensively considering the linkage of different relay protection devices. Furthermore, it determines corresponding maintenance plans based on the reliability scores of the relay protection devices and the healthy operating status of the relay protection line groups, enabling timely detection of potential hazards in the operation of the relay protection line groups. Simultaneously, this application employs a dynamic weighting method when scoring the reliability of relay protection devices, fully considering the importance of various reliability evaluation indicators under different conditions, thus providing a comprehensive and accurate reliability score for the relay protection devices. In addition, this application assesses maintenance cycles based on the healthy operating status of the relay protection device line groups, improving maintenance efficiency, reducing excessive inspections, and avoiding resource waste.

[0151] Example 2

[0152] Figure 5A schematic diagram of the health status evaluation device for a relay protection device line group according to an embodiment of this application is shown. Figure 5 As shown in the figure, this application embodiment also provides a health status evaluation device for a relay protection device line group, including:

[0153] The acquisition module 10 is configured to acquire parameter data of relevant relay protection devices in the relay protection device line group, wherein the parameter data includes electrical parameters and environmental parameters;

[0154] The relay protection device status scoring module 20 is configured to determine the status score of the relay protection device based on the parameter data of the relay protection device;

[0155] The relay protection device reliability scoring module 30 is configured to determine the reliability score of the relay protection device based on the status score of the relay protection device.

[0156] The line group health status scoring module 40 is configured to determine the health status score of the line group of the relay protection device based on the reliability score of the relay protection device.

[0157] The maintenance plan determination module 50 is configured to determine the maintenance plan for the relay protection device line group based on the reliability score of the relay protection device and the health status score of the relay protection device line group.

[0158] In some embodiments, the relay protection device status scoring module 20 is further configured to:

[0159] The parameter data is normalized, and parameter features are extracted from the normalized parameter data.

[0160] The parameter features are input into a preset relay protection device status scoring model to obtain the status score of the relay protection device.

[0161] In some embodiments, the relay protection device reliability scoring module 30 is further configured as follows:

[0162] The reliability score of the relay protection device is determined by weighting the usage data and the status score of the relay protection device.

[0163] The usage data of the relay protection device includes at least one of the following: the service life of the relay protection device, the number of times the relay protection device has operated correctly within a preset time, and the time since the last maintenance of the relay protection device.

[0164] In some embodiments, the relay protection device reliability scoring module 30 is further configured to:

[0165] The reliability score of the relay protection device is determined based on the status score and historical data of the relay protection device.

[0166] The reliability scoring formula for the relay protection device is as follows:

[0167] ,

[0168] ,

[0169] ,

[0170] ,

[0171] in, This indicates the reliability score of the relay protection device. This indicates the overdue service rate of relay protection devices. Indicates the service life of the relay protection device. This indicates the average service life of this type of relay protection device. This indicates the probability of the relay protection device operating correctly. and These represent the number of correct operations and the total number of operations of the relay protection device, respectively, within a certain period. This indicates the overdue maintenance rate of relay protection devices. This indicates the time since the last maintenance of the relay protection device. This indicates the average time before the first fault occurs after maintenance for this type of relay protection device. This indicates the status score of the relay protection device. This indicates the previous reliability score of the relay protection device. These represent the weighting coefficients.

[0172] In some embodiments, the line group health status scoring module 40 is further configured as follows:

[0173] The reliability scores of each relay protection device in the relay protection device line group are weighted and summed to obtain the health status score of the relay protection device line group.

[0174] The formula for calculating the health status score is as follows:

[0175] ,

[0176] in, This indicates the health status score of the entire relay protection device circuit group. This represents the i-th relay protection device in the line group. This represents the weighting coefficient of the i-th relay protection device. This represents the reliability score of the i-th relay protection device.

[0177] In some embodiments, the maintenance plan determination module 50 is further configured to:

[0178] The maintenance level of the relay protection device is determined based on its reliability score.

[0179] The maintenance schedule for the relay protection device is determined according to its maintenance level.

[0180] The health status score of the relay protection device circuit group determines whether the relay protection device circuit group needs to be inspected.

[0181] In some embodiments, the maintenance levels of the relay protection device include immediate maintenance level, planned maintenance level, and evaluation level, and the maintenance plan determination module 50 is further configured to:

[0182] The maintenance schedule for the relay protection device is arranged according to its maintenance level, including:

[0183] If the maintenance level of the relay protection device is immediate maintenance, maintenance arrangements shall be made for the relay protection device;

[0184] If the maintenance level of the relay protection device is the planned maintenance level, calculate the latest maintenance period of the relay protection device, and schedule the maintenance of the relay protection device according to the maintenance period;

[0185] If the maintenance level of the relay protection device is the evaluation level, calculate the evaluation cycle for the next reliability rating of the relay protection device.

[0186] In some embodiments, the maintenance plan determination module 50 is further configured to:

[0187] If the health status score of the relay protection device line group is greater than or equal to the preset score threshold, then the relay protection device line group does not need to be inspected.

[0188] If the health status score of the relay protection device line group is less than the preset score threshold, the relay protection devices in the relay protection device line group are inspected and repaired in sequence according to the reliability score ranking results of each relay protection device in the relay protection device line group.

[0189] In some embodiments, the electrical parameters include at least one of current data, voltage data, frequency data, and phase angle data, and the environmental parameters include at least one of temperature data, humidity data, and air pressure data;

[0190] The historical data of the relay protection device includes at least one of the following: average service life, service life, historical rating, operation record, and maintenance record.

[0191] The health status evaluation device for relay protection device line groups provided in this application corresponds to the health status evaluation method for relay protection device line groups in the above embodiments. Any option in the embodiments of the health status evaluation method for relay protection device line groups is also applicable to the embodiments of the health status evaluation device for relay protection device line groups, and will not be repeated here.

[0192] Example 3

[0193] This application also provides an electronic device, which includes at least a memory and a processor. The memory stores a computer program, and the processor implements the above-described method for evaluating the health status of a relay protection device line group when executing the computer program in the memory.

[0194] In some embodiments, the processor executing a computer program may be a processing device that includes one or more general-purpose processing devices, such as a microprocessor, a central processing unit (CPU), a graphics processing unit (GPU), etc. More specifically, the processor may be a complex instruction set computing (CISC) microprocessor, a reduced instruction set computing (RISC) microprocessor, a very long instruction word (VLIW) microprocessor, a processor that runs other instruction sets, or a processor that runs a combination of instruction sets. The processor may also be one or more special-purpose processing devices, such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), system-on-a-chip (SoCs), etc.

[0195] The memory may be a read-only memory (ROM), random access memory (RAM), phase-change random access memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), electrically erasable programmable read-only memory (EEPROM), other types of random access memory (RAM), flash drives or other forms of flash memory, cache, registers, static memory, optical disc read-only memory (CD-ROM), digital versatile optical disc (DVD) or other optical storage, magnetic tape cassette or other magnetic storage devices, or any other possible non-transitory medium used to store information or instructions that can be accessed by computer equipment.

[0196] The electronic devices in this application embodiment may include, but are not limited to, fixed terminal devices such as servers, desktop computers, and digital TVs, as well as mobile terminal devices such as in-vehicle devices (e.g., head-up displays), handheld devices (e.g., mobile phones, tablets, etc.), and wearable devices (e.g., smartwatches, smart bracelets, etc.).

[0197] Example 4

[0198] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for evaluating the health status of a relay protection device line group.

[0199] The computer-readable storage medium in this application embodiment can be any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. In this application embodiment, the computer-readable storage medium can be any tangible medium containing or storing a computer program that can be used by or in conjunction with an instruction execution system, apparatus, or device; for example, it can be the aforementioned memory.

[0200] The computer programs of embodiments of this application can be organized into one or more computer-executable components or modules. Various aspects of this application can be implemented with any number and combination of such components or modules. For example, aspects of this application are not limited to the specific computer-executable instructions or specific components or modules shown in the drawings and described herein. Other embodiments may include different computer-executable instructions or components having more or fewer functions than those shown and described herein.

[0201] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A method for evaluating the health status of a relay protection device circuit group, characterized in that, include: Collect parameter data of relevant relay protection devices in the relay protection device line group, wherein the parameter data includes electrical parameters and environmental parameters; The status score of the relay protection device is determined based on the parameter data of the relay protection device; The reliability score of the relay protection device is determined based on its status score. The health status score of the relay protection device line group is determined based on the reliability score of the relay protection device. The maintenance plan for the relay protection device line group is determined based on the reliability score of the relay protection device and the health status score of the relay protection device line group.

2. The method according to claim 1, characterized in that, The status score of the relay protection device is determined based on the parameter data of the relay protection device, including: The parameter data is normalized, and parameter features are extracted from the normalized parameter data. The parameter features are input into a preset relay protection device status scoring model to obtain the status score of the relay protection device.

3. The method according to claim 1, characterized in that, Based on the status score of the relay protection device, the reliability score of the relay protection device is determined, including: The reliability score of the relay protection device is determined by weighting the usage data and the status score of the relay protection device. The usage data of the relay protection device includes at least one of the following: the service life of the relay protection device, the number of times the relay protection device has operated correctly within a preset time, and the time since the last maintenance of the relay protection device.

4. The method according to claim 3, characterized in that, The method further includes: The reliability score of the relay protection device is determined based on the status score and historical data of the relay protection device. The reliability scoring formula for the relay protection device is as follows: ， ， ， ， in, This indicates the reliability score of the relay protection device. This indicates the overdue service rate of relay protection devices. Indicates the service life of the relay protection device. This indicates the average service life of this type of relay protection device. This indicates the probability of the relay protection device operating correctly. and These represent the number of correct operations and the total number of operations of the relay protection device, respectively, within a certain period. This indicates the overdue maintenance rate of relay protection devices. This indicates the time since the last maintenance of the relay protection device. This indicates the average time before the first fault occurs after maintenance for this type of relay protection device. This indicates the status score of the relay protection device. This indicates the previous reliability score of the relay protection device. These represent the weighting coefficients.

5. The method according to claim 1, characterized in that, The health status score of the relay protection device line group is determined based on the reliability score of the relay protection device, including: The reliability scores of each relay protection device in the relay protection device line group are weighted and summed to obtain the health status score of the relay protection device line group. The formula for calculating the health status score is as follows: ， in, This indicates the health status score of the entire relay protection device circuit group. This represents the i-th relay protection device in the line group. This represents the weighting coefficient of the i-th relay protection device. This represents the reliability score of the i-th relay protection device.

6. The method according to claim 1, characterized in that, The maintenance plan for the relay protection device line group is determined based on the reliability score of the relay protection device and the health status score of the relay protection device line group, including: The maintenance level of the relay protection device is determined based on its reliability score. The maintenance schedule for the relay protection device is determined according to its maintenance level. The health status score of the relay protection device circuit group determines whether the relay protection device circuit group needs to be inspected.

7. The method according to claim 6, characterized in that, The maintenance levels of the relay protection device include immediate maintenance level, planned maintenance level, and assessment level. The maintenance schedule for the relay protection device is arranged according to its maintenance level, including: If the maintenance level of the relay protection device is immediate maintenance, maintenance arrangements shall be made for the relay protection device; If the maintenance level of the relay protection device is the planned maintenance level, calculate the latest maintenance period of the relay protection device, and schedule the maintenance of the relay protection device according to the maintenance period; If the maintenance level of the relay protection device is the evaluation level, calculate the evaluation cycle for the next reliability rating of the relay protection device.

8. The method according to claim 6, characterized in that, Determining whether to perform maintenance on the relay protection device line group based on the health status score of the line group includes: If the health status score of the relay protection device line group is greater than or equal to the preset score threshold, then the relay protection device line group does not need to be inspected. If the health status score of the relay protection device line group is less than the preset score threshold, the relay protection devices in the relay protection device line group are inspected and repaired in sequence according to the reliability score ranking results of each relay protection device in the relay protection device line group.

9. The method according to claim 4, characterized in that, The electrical parameters include at least one of current data, voltage data, frequency data, and phase angle data; the environmental parameters include at least one of temperature data, humidity data, and air pressure data. The historical data of the relay protection device includes at least one of the following: average service life, service life, historical rating, operation record, and maintenance record.

10. A health status evaluation device for a relay protection circuit group, characterized in that, include: The data acquisition module is configured to acquire parameter data of relevant relay protection devices in the relay protection device line group, wherein the parameter data includes electrical parameters and environmental parameters; The relay protection device status scoring module is configured to determine the status score of the relay protection device based on the parameter data of the relay protection device; The relay protection device reliability scoring module is configured to determine the reliability score of the relay protection device based on the status score of the relay protection device. The line group health status scoring module is configured to determine the health status score of the line group of the relay protection device based on the reliability score of the relay protection device. The maintenance plan determination module is configured to determine the maintenance plan for the relay protection device line group based on the reliability score of the relay protection device and the health status score of the relay protection device line group.

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