A method and system for detecting overage service of a relay protection device

Abstract

The application provides a method for detecting over-service of a relay protection device, comprising the following steps: determining a plurality of modules of the relay protection device according to functions based on manufacturer information and a model of the relay protection device; obtaining starting scores, depreciation coefficients and running state scores of each module of the relay protection device, and combining a preset importance adjustment coefficient and a running environment adjustment coefficient to calculate an over-service replacement threshold of the relay protection device; judging whether the relay protection device is over-service according to the over-service replacement threshold of the relay protection device, and formulating a safety strategy of the relay protection device as immediate replacement when it is determined that the relay protection device is over-service. The application can ensure more comprehensive and reasonable detection by comprehensively considering various influencing factors, can make the relay protection device play a greater benefit in the whole life cycle, and can improve the operation safety of the relay protection device and save the human resource cost of a team.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power systems, and particularly relates to a method and system for detecting over-service of a relay protection device. BACKGROUND

[0002] A relay protection device is defined as over-service equipment when it has been in operation for more than 12 years. At present, the safety strategy for over-service of a relay protection device is to replace the device as soon as it has been in operation for 12 years. However, this strategy does not maximize the use of relay protection device resources, and the quality of relay protection devices varies due to the large number of types of relay protection devices, which makes replacement operations difficult for teams. Therefore, it is necessary to detect over-service of a relay protection device.

[0003] However, there is a lack of safety strategies or methods for detecting over-service of a relay protection device in the prior art. Therefore, there is an urgent need for a method for detecting over-service of a relay protection device, which comprehensively considers different influencing factors (such as different manufacturers, different device models, different importance levels, different operating environments, and different operation and maintenance situations) to ensure more comprehensive and reasonable detection, so that the relay protection device can play a greater benefit in the whole life cycle, which not only improves the operation safety of the relay protection device, but also saves the human resource cost of the team. SUMMARY

[0004] The technical problem to be solved by the embodiments of the present application is to provide a method and system for detecting over-service of a relay protection device, which comprehensively considers multiple influencing factors to ensure more comprehensive and reasonable detection, so that the relay protection device can play a greater benefit in the whole life cycle, which not only improves the operation safety of the relay protection device, but also saves the human resource cost of the team.

[0005] To solve the above technical problems, the embodiments of the present application provide a method for detecting over-service of a relay protection device, which comprises the following steps:

[0006] Based on the manufacturer information and model of the relay protection device, a plurality of modules divided by function of the relay protection device are determined;

[0007] The starting score, operating life, and operating state score of each module in the relay protection device are obtained, and a preset importance adjustment coefficient and an operating environment adjustment coefficient are combined to calculate an over-service replacement threshold of the relay protection device;

[0008] According to the over-service replacement threshold of the relay protection device, it is judged whether the relay protection device is over-service, and when it is determined that the relay protection device is over-service, a safety strategy for the relay protection device is formulated as immediate replacement.

[0009] The plurality of modules of the relay protection device according to the function at least include a power module, a CPU module, a sampling module, an incoming module, an outgoing module, a display module and a communication module.

[0010] The overage replacement threshold Y of the relay protection device is calculated by the formula g ; wherein,

[0011] f is a preset operating environment adjustment coefficient; k is a preset importance adjustment coefficient; N An is the starting score of the nth module; y n is the operating life of the nth module; is the depreciation coefficient of the nth module; N Bnm is the operating state score of the nth module in the mth time; N is the total number of modules.

[0012] The overage service of the relay protection device is obtained by judging that the overage replacement threshold of the relay protection device is less than the first threshold.

[0013] The method further comprises:

[0014] If the overage replacement threshold of the relay protection device is greater than or equal to the first threshold and less than the second threshold, it is judged that the relay protection device is not overage, and the safety strategy of the relay protection device is formulated as attention and needs to be upgraded.

[0015] The method further comprises:

[0016] If the overage replacement threshold of the relay protection device is greater than or equal to the second threshold and less than the third threshold, it is judged that the relay protection device is not overage, and the safety strategy of the relay protection device is formulated as maintaining healthy operation.

[0017] The embodiment of the application also provides a system for detecting overage service of a relay protection device, comprising:

[0018] A function module division unit is configured to determine a plurality of modules of the relay protection device according to functions based on manufacturer information and a model of the relay protection device.

[0019] An overage replacement threshold calculation unit is configured to obtain starting scores, operating life and operating state scores of each module in the relay protection device, and calculate an overage replacement threshold of the relay protection device in combination with a preset importance adjustment coefficient and an operating environment adjustment coefficient.

[0020] ​The over-service replacement unit is used to determine whether the relay protection device is over-service according to the over-service replacement threshold of the relay protection device, and formulates the safety strategy of the relay protection device as immediate replacement when it is determined that the relay protection device is over-service.

[0021] The relay protection device includes at least power supply module, CPU module, sampling module, input module, output module, display module and communication module according to the function.

[0022] The over-service replacement threshold Y of the relay protection device is calculated by the formula g ; wherein,

[0023] f is a preset operating environment adjustment coefficient; k is a preset importance adjustment coefficient; N An is the starting score of the nth module; y n is the operating life of the nth module; is the depreciation coefficient of the nth module; N Bnm is the operating state score of the nth module in the mth time; N is the total number of modules.

[0024] The over-service of the relay protection device is obtained by determining that the over-service replacement threshold of the relay protection device is less than the first threshold.

[0025] The embodiment of the present application has the following beneficial effects:

[0026] The present application comprehensively considers various influencing factors including the manufacturer information and model of the relay protection device, operating life, operation and maintenance degree (such as operating state score), importance (such as importance adjustment coefficient), operating environment (such as operating environment adjustment coefficient) and the like to ensure more comprehensive and reasonable detection, so that the relay protection device can play a greater benefit in the whole life cycle, which improves the operation safety of the relay protection device and saves the human resource cost of the team. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings obtained according to these drawings without creative labor are still within the scope of the present application.

[0028] Figure 1 The flow chart of the method for detecting over-service of the relay protection device provided by the embodiment of the present application;

[0029] Figure 2 ​This is a schematic diagram of a system for detecting overdue relay protection devices, provided in an embodiment of the present invention. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] like Figure 1 As shown in the figure, a method for detecting overdue service of a relay protection device is provided in an embodiment of the present invention. The method includes the following steps:

[0032] Step S1: Based on the manufacturer information and model of the relay protection device, determine the multiple modules that the relay protection device is divided into according to its functions;

[0033] Step S2: Obtain the initial score, service life, and operating status score of each module in the relay protection device, and calculate the overdue replacement threshold of the relay protection device by combining the preset importance adjustment coefficient and operating environment adjustment coefficient.

[0034] Step S3: Based on the overdue replacement threshold of the relay protection device, determine whether the relay protection device has exceeded its service life, and when it is determined that the relay protection device has exceeded its service life, formulate a safety strategy for the relay protection device to replace it immediately.

[0035] The specific process is as follows: In step S1, by reading the manufacturer information and model of the relay protection device, the multiple modules divided according to the function of the relay protection device are determined, including at least a power supply module, CPU module, sampling module, input module, output module, display module, and communication module. It should be noted that the modules divided according to function of the relay protection device can be obtained by looking up a table, which summarizes relay protection devices from various manufacturers and models available on the market. Furthermore, different devices have different classifications and focuses, such as line protection and stability control devices (including channel modules, etc.).

[0036] In step S2, using the formula The overdue replacement threshold Y of the relay protection device is calculated. g Where f is the preset operating environment adjustment coefficient (e.g., 0.9 ≤ f ≤ 1.2); k is the preset importance adjustment coefficient (e.g., 1 ≤ k ≤ 1.2); N An y is the starting score for the nth module; n Let n be the number of years the nth module has been running. N is the depreciation factor for the nth module; Bnm The nth module is rated for its running status in the mth iteration; N is the total number of modules.

[0037] It should be noted that the sum of the starting score of the first module to the starting score of the nth module is 100, i.e. N A1 +N A2 +.....+N An = 100.

[0038] At the same time, the score of each running state of each module is obtained by collecting the operation and maintenance data (including defect data, inspection data, correct action of the device, incorrect action of the device, switch transmission data, etc.) of the relay protection device after operation and maintenance to form a data set. Single N Bnm is a positive or negative value, for example, a negative value is scored when there is a defect, and a positive value is scored after the defect is eliminated. The absolute value of the score after the same defect is eliminated cannot be greater than the absolute value of the score when the defect occurs. In subsequent operation and maintenance, each defect data, inspection data, correct action of the device, incorrect action of the device, switch transmission data, etc. is scored.

[0039] In step S3, the overage service of the relay protection device is obtained by determining that the overage replacement threshold of the relay protection device is less than the first threshold (such as 60), i.e. Y g < the first threshold 60, the safety strategy of the relay protection device is to replace immediately.

[0040] In the embodiment of the application, if the overage replacement threshold of the relay protection device is greater than or equal to the first threshold and less than the second threshold (such as 80), i.e. the first threshold 60 <= Y g < the second threshold 80, it is determined that the relay protection device is not overage, and the safety strategy of the relay protection device is to pay attention and need to upgrade the operation and maintenance; or, if the overage replacement threshold of the relay protection device is greater than or equal to the second threshold and less than the third threshold (such as 100), i.e. the second threshold 80 <= Y g < the third threshold 100, it is determined that the relay protection device is not overage, and the safety strategy of the relay protection device is to maintain healthy operation.

[0041] In one example, the first step of dividing different relay protection devices into N modules according to functions includes: power supply module, CPU module, sampling module, incoming module, outgoing module, display module, communication module and other modules, etc.

[0042] The second step is to collect the historical operation and maintenance information of the protection device of the same manufacturer and the same model in the largest range, including historical defect data, historical inspection data, device historical action, device historical switch transmission data and manufacturer evaluation data, etc. to form a data set A.

[0043] The third step is to set the starting score of the N modules of the protection device of the same manufacturer and the same model according to the data set A: NA1 , N A2 , N A3 , …, N AN , meet: N A1 + N A2 + … + N An = 100 points;

[0044] The fourth step, each module is depreciated according to the running time, and the depreciation formula is: n = {1, N}, after the module is replaced, y n Reset to 0;

[0045] The fifth step, collect the operation and maintenance data of the relay protection device after operation, including: defect data, inspection data, correct action of the device, incorrect action of the device and switch transmission data, etc., to form a data set B;

[0046] The sixth step, according to the data set B, the running state score of the N modules of the relay protection device is given: the first running state score N B11 , N B12 , …; The second running state score N B21 , N B22 ; …; The Nth running state score N BN1 , N BN2 , …;

[0047] The seventh step, according to the importance of the relay protection device in the power grid and the grade of the power grid accident caused by incorrect action of protection, an importance adjustment coefficient k is given k satisfies: 1 ≤ k ≤ 1.2; Wherein, the higher the importance of the relay protection device, the higher the value; The lower the importance, the lower the value;

[0048] The eighth step, according to the running environment of the relay protection device, the running environment adjustment coefficient f is given, f satisfies: 0.9 ≤ f ≤ 1.2, the better the running environment, the higher the value, the worse the running environment, the lower the value;

[0049] The ninth step, the related data of the relay protection device is shown in Table 1, and according to the related data in Table 1, the overage replacement threshold Y g of the relay protection device is calculated:

[0050]

[0051] Table 1

[0052]

[0053]

[0054] The tenth step, according to the threshold value, the safety strategy of the relay protection device is as follows:

[0055] Y g <60, the safety strategy of the relay protection device is immediate replacement;

[0056] 60<=Y g <80, the safety strategy of the relay protection device is attention and needs to be upgraded;

[0057] 80<=Y g <100, the safety strategy of the relay protection device is to maintain healthy operation.

[0058] As Figure 2 shown, a system for detecting over-service of a relay protection device is provided in the embodiment of the application, comprising:

[0059] The function module division unit 110 is configured to determine a plurality of modules of the relay protection device divided according to functions based on manufacturer information and a model of the relay protection device.

[0060] The over-service replacement threshold value calculation unit 120 is configured to obtain starting scores, running time limits and running state scores of each module of the relay protection device, and calculate an over-service replacement threshold value of the relay protection device in combination with a preset importance adjustment coefficient and a running environment adjustment coefficient.

[0061] The over-service replacement unit 130 is configured to determine whether the relay protection device is over-served according to the over-service replacement threshold value of the relay protection device, and determine that the safety strategy of the relay protection device is immediate replacement when it is determined that the relay protection device is over-served.

[0062] The plurality of modules of the relay protection device divided according to functions at least include a power module, a CPU module, a sampling module, an incoming module, an outgoing module, a display module and a communication module.

[0063] The over-service replacement threshold value Y of the relay protection device is calculated by the formula ; wherein, g ; wherein,

[0064] f is a preset running environment adjustment coefficient; k is a preset importance adjustment coefficient; N An is a starting score of the nth module; y n is a running time limit of the nth module; is a depreciation coefficient of the nth module; N Bnm is a running state score of the nth module in the mth time; and N is a total number of modules.

[0065] The over-service period of the relay protection device is obtained by judging that the over-service replacement threshold of the relay protection device is less than a first threshold.

[0066] The embodiment of the present application has the following beneficial effects:

[0067] The present application comprehensively considers various influencing factors including manufacturer information and model of the relay protection device, operation life, operation and maintenance degree (such as operation state score), importance (such as importance adjustment coefficient), operation environment (such as operation environment adjustment coefficient) and the like to ensure more comprehensive and reasonable detection, so that the relay protection device can play a greater benefit in the whole life cycle, which not only improves the operation safety of the relay protection device, but also saves the manpower resource cost of the team.

[0068] It is worth noting that the various system modules included in the above system embodiment are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of each functional module are only for easy mutual differentiation, and are not used to limit the protection scope of the present application.

[0069] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiment methods can be completed by programs instructing related hardware, and the programs can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk and the like.

[0070] The above only discloses the preferred embodiments of the present application, and of course cannot limit the protection scope of the present application, so equivalent changes made according to the claims of the present application still fall within the scope of the present application.

Claims

1. A method for detecting overdue service life of relay protection devices, characterized in that, The method comprises the following steps: Based on the manufacturer information and model of the relay protection device, determine the multiple modules of the relay protection device divided according to functions; Obtain the starting score, operating age and operating state score of each module in the relay protection device, and combine the preset importance adjustment coefficient and operating environment adjustment coefficient to calculate the overage replacement threshold of the relay protection device; According to the overage replacement threshold of the relay protection device, judge whether the relay protection device is overage service, and when it is judged that the relay protection device is overage service, formulate the safety strategy of the relay protection device as immediate replacement.

2. The method of claim 1, wherein the method further comprises: The multiple modules of the relay protection device divided according to functions at least include power module, CPU module, sampling module, input module, output module, display module and communication module.

3. The method of claim 1, wherein the method further comprises: The overage replacement threshold Y of the relay protection device is calculated by the formula g ; wherein,​ f is a preset operating environment adjustment coefficient; k is a preset importance adjustment coefficient; N An is the starting score of the nth module; y n is the operating life of the nth module; is the depreciation coefficient of the nth module; N Bnm is the operating state score of the nth module at the mth time; N is the total number of modules.

4. The method of claim 1, wherein the method further comprises: The overage service of the relay protection device is obtained by judging that the overage replacement threshold of the relay protection device is less than the first threshold.

5. The method of claim 4, wherein the method further comprises: The method further comprises: If the overage replacement threshold of the relay protection device is greater than or equal to the first threshold and less than the second threshold, it is judged that the relay protection device is not overage service, and the safety strategy of the relay protection device is formulated as attention and needs to be upgraded.

6. The method of claim 5, wherein the method further comprises: The method further comprises: If the overage replacement threshold of the relay protection device is greater than or equal to the second threshold and less than the third threshold, it is judged that the relay protection device is not overage service, and the safety strategy of the relay protection device is formulated as maintaining healthy operation.

7. A system for detecting over-service of a protective relay, the system comprising: Comprise: The function module division unit is used for determining the multiple modules of the relay protection device divided according to functions based on the manufacturer information and model of the relay protection device; The overage replacement threshold calculation unit is used for obtaining the starting score, operating age and operating state score of each module in the relay protection device, and combining the preset importance adjustment coefficient and operating environment adjustment coefficient to calculate the overage replacement threshold of the relay protection device; The overage service replacement unit is used for judging whether the relay protection device is overage service according to the overage replacement threshold of the relay protection device, and when it is judged that the relay protection device is overage service, formulating the safety strategy of the relay protection device as immediate replacement.

8. The system for detecting over-service of a protective relay according to claim 7, wherein, The multiple modules of the relay protection device divided according to functions at least include power module, CPU module, sampling module, input module, output module, display module and communication module.

9. The system for detecting over-service of a protective relay according to claim 7, wherein, The overage replacement threshold Y of the relay protection device is calculated by the formula g ; wherein,​ f is a preset operating environment adjustment coefficient; k is a preset importance adjustment coefficient; N An is the starting score of the nth module; y n is the operating life of the nth module; is the depreciation coefficient of the nth module; N Bnm is the operating state score of the nth module at the mth time; N is the total number of modules.

10. The system for detecting over-service of a protective relay according to claim 7, wherein, The overage service of the relay protection device is obtained by judging that the overage replacement threshold of the relay protection device is less than the first threshold.

Images