Performance evaluation method and system for current transformer

Abstract

The present application relates to the technical field of power equipment detection, and provides a performance evaluation method and system for a current transformer, the method comprising: obtaining specification information and application environment information of the current transformer, and determining a working parameter information set of the current transformer based on the specification information; wherein the working parameter information set comprises a plurality of working parameter information subsets, and each of the working parameter information subsets is different from each other; determining a performance evaluation environment of the current transformer based on the application environment information; for each of the working parameter information subsets, under the performance evaluation environment, controlling the preset working duration of the current transformer based on the working parameter information subset, and obtaining a target stability coefficient of the current transformer during operation; and performing a performance evaluation on the current transformer based on each of the target stability coefficients. This method improves the accuracy and reliability of the performance evaluation method of the current transformer.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment detection, and in particular to a performance evaluation method and system for a current transformer. Background Art

[0002] With the continuous development of power systems and the improvement of their intelligence level, current transformers play a vital role in power monitoring and protection. As a sensor device in the power system, the current transformer is mainly used to measure current signals and convert them into low current signals proportional to them for subsequent measurement, control and protection of the power system. However, since the performance of the current transformer directly affects the reliability and safety of the power system, it is particularly important to evaluate the performance of the current transformer. When evaluating the performance of the current transformer, the prior art usually evaluates the performance of the current transformer by inputting a certain current into the current transformer under normal environmental conditions in the laboratory and detecting the linearity of the output current and input current of the circuit transformer. The accuracy and reliability of this evaluation method need to be improved. Summary of the invention

[0003] The present application provides a performance evaluation method and system for a current transformer to solve the problems raised by the above background technology.

[0004] In a first aspect, the present application provides a performance evaluation method for a current transformer, comprising:

[0005] Acquire a test text of a current transformer in a database; wherein the test text of the current transformer includes specification information and application environment information of the current transformer;

[0006] Determine the operating parameter information set of the current transformer based on the specification information; wherein the operating parameter information set includes a plurality of operating parameter information subsets, and each of the operating parameter information subsets is different from each other;

[0007] Determining a performance evaluation environment of the current transformer based on the application environment information;

[0008] For each of the subsets of operating parameter information, in the performance evaluation environment, based on the subset of operating parameter information, controlling the preset working time of the current transformer, and obtaining a target stability coefficient of the current transformer during the working process;

[0009] The performance of the current transformer is evaluated based on each of the target stability factors.

[0010] In a possible implementation manner, the specification information includes parameter intervals of multiple operating parameters, and determining the operating parameter information set of the current transformer based on the specification information includes:

[0011] For each of the working parameters, a target parameter value is determined within a parameter interval corresponding to the working parameter based on a preset parameter value algorithm to obtain a parameter value set corresponding to the working parameter;

[0012] Each parameter value in each parameter value set is matched one-to-one to obtain multiple working parameter information subsets; wherein a set consisting of all the working parameter information subsets is the working parameter information set.

[0013] In a possible implementation manner, the application environment information includes historical environment parameter information of multiple environment parameters, and determining the performance evaluation environment of the current transformer based on the application environment information includes:

[0014] For each of the environmental parameters, determining an extreme environmental parameter value corresponding to the environmental parameter based on historical environmental parameter information corresponding to the environmental parameter;

[0015] A performance evaluation environment of the current transformer is determined based on each of the extreme environment parameter values.

[0016] In a possible implementation, in the performance evaluation environment, controlling the preset working time of the current transformer based on the working parameter information subset, and obtaining a target stability coefficient of the current transformer during the working process, includes:

[0017] Using simulation technology to construct a virtual environment corresponding to the performance evaluation environment;

[0018] Using simulation technology to construct a virtual current transformer corresponding to the current transformer, and placing the virtual current transformer in the virtual environment;

[0019] Using simulation technology, setting the working state corresponding to the virtual current transformer based on the working parameter information subset, and maintaining the working state for the preset time, and obtaining the input current information and output current information corresponding to the virtual current transformer in the working state;

[0020] The target stability coefficient is acquired based on the input current information and the output current information.

[0021] In a possible implementation manner, the acquiring the target stability coefficient based on the input current information and the output current information includes:

[0022] A first curve is drawn based on the input current information, and a second curve is drawn based on the output current information; wherein the first curve is a curve showing that the input current of the virtual current transformer changes with time, and the second curve is a curve showing that the output current of the virtual current transformer changes with time;

[0023] Segmenting the first curve based on a preset curve segmentation rule to obtain a plurality of first curve segments, and segmenting the second curve based on a preset curve segmentation rule to obtain a plurality of second curve segments;

[0024] For each of the first curve segments, determining a second curve segment corresponding to the first curve segment, and obtaining a similarity between the first curve segment and the second curve segment corresponding to the first curve segment;

[0025] Determine the minimum similarity among the similarities as a first intermediate stability coefficient, and determine the difference between the maximum similarity and the minimum similarity among the similarities as a second intermediate stability coefficient;

[0026] A ratio of the first intermediate stability coefficient to the second intermediate stability coefficient is determined as the target stability coefficient.

[0027] In a possible implementation manner, the performing performance evaluation on the current transformer based on each of the target stability coefficients includes:

[0028] Comparing each of the target stability coefficients with a preset stability coefficient respectively;

[0029] If each of the target stability coefficients is not less than the preset stability coefficient, it is determined that the performance of the current transformer is qualified.

[0030] In a possible implementation, the step of acquiring a test text of the current transformer from a database includes:

[0031] Obtaining an identification code of the current transformer, and arranging the numbers in the identification code in sequence based on the sequence of the numbers in the identification code to obtain a digital sequence;

[0032] Performing frame processing on a preset video image to obtain image frames corresponding to the video image, and arranging the image frames in sequence based on the corresponding playback timing of each image frame in the video image to obtain a first image frame sequence;

[0033] For each number in the digital sequence, determine a target image frame corresponding to the number in the first image frame sequence; wherein the number corresponding to the order of the target image frame in the first image frame sequence is consistent with the number;

[0034] Arrange the target image frames in sequence based on the order of the numbers corresponding to the target image frames in the digital sequence to obtain a second image frame sequence;

[0035] Decryption processing is performed on each encrypted text in the database based on the second image frame sequence, and the encrypted text that is successfully decrypted is determined to be the test text.

[0036] In a second aspect, the present application provides a performance evaluation system for a current transformer, comprising:

[0037] A first acquisition module is used to acquire a test text of a current transformer from a database; wherein the test text of the current transformer includes specification information and application environment information of the current transformer;

[0038] A first determination module, configured to determine a working parameter information set of the current transformer based on the specification information; wherein the working parameter information set includes a plurality of working parameter information subsets, and each of the working parameter information subsets is different from each other;

[0039] A second determination module, configured to determine a performance evaluation environment of the current transformer based on the application environment information;

[0040] A second acquisition module is used for controlling the preset working time of the current transformer based on the working parameter information subset for each of the working parameter information subsets in the performance evaluation environment, and obtaining a target stability coefficient of the current transformer during the working process;

[0041] An evaluation module is used to perform performance evaluation on the current transformer based on each of the target stability coefficients.

[0042] In a possible implementation, the second acquisition module includes:

[0043] A first construction unit is used to construct a virtual environment corresponding to the performance evaluation environment by using simulation technology;

[0044] A second construction unit is used to construct a virtual current transformer corresponding to the current transformer by using a simulation technology, and place the virtual current transformer in the virtual environment;

[0045] A first acquisition unit is used to use simulation technology to set the working state corresponding to the virtual current transformer based on the working parameter information subset, and to maintain the working state for the preset time, and to obtain input current information and output current information corresponding to the virtual current transformer in the working state;

[0046] The second acquisition unit is used to acquire the target stability coefficient based on the input current information and the output current information.

[0047] In a possible implementation, the first acquisition module includes:

[0048] A third acquisition unit is used to acquire the identification code of the current transformer, and arrange the numbers in the identification code in sequence based on the sequence of the numbers in the identification code to obtain a digital sequence;

[0049] A first processing unit is used to perform frame processing on a preset video image to obtain image frames corresponding to the video image, and to arrange the image frames in sequence based on the corresponding playback timing of each image frame in the video image to obtain a first image frame sequence;

[0050] a determination unit, configured to determine, for each number in the digital sequence, a target image frame corresponding to the number in the first image frame sequence; wherein the number corresponding to the order of the target image frame in the first image frame sequence is consistent with the number;

[0051] A sorting unit, configured to arrange the target image frames in sequence based on the order of the numbers corresponding to the target image frames in the digital sequence, so as to obtain a second image frame sequence;

[0052] The second processing unit is used to decrypt each encrypted text in the database based on the second image frame sequence, and determine that the encrypted text that is successfully decrypted is the test text.

[0053] The present application provides a performance evaluation method and system for a current transformer, wherein the method includes obtaining a test text of a current transformer in a database; wherein the test text of the current transformer includes specification information and application environment information of the current transformer; determining a working parameter information set of the current transformer based on the specification information; wherein the working parameter information set includes multiple working parameter information subsets, each of which is different from the other; determining a performance evaluation environment of the current transformer based on the application environment information; for each of the working parameter information subsets, under the performance evaluation environment, controlling the preset working time of the current transformer based on the working parameter information subset, and obtaining a target stability coefficient of the current transformer during operation; and evaluating the performance of the current transformer based on each of the target stability coefficients. On the one hand, the method can fully understand the design parameters and working environment of the current transformer by obtaining the specification information and application environment information of the current transformer. In this way, a corresponding performance evaluation scheme can be designed according to the specific specification information and application environment, which is more in line with the actual situation of the current transformer, and helps to improve the accuracy and reliability of the performance evaluation method of the current transformer. On the other hand, in this embodiment, each subset of working parameter information is a different working parameter combination, which can cover a wider range of working conditions of the current transformer, thereby comprehensively evaluating the performance of the current transformer under different working conditions, which helps to further improve the accuracy and reliability of the performance evaluation method of the current transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0055] Figure 1 A schematic flow chart of a method for evaluating the performance of a current transformer provided in an embodiment of the present application;

[0056] Figure 2 A schematic block diagram of the structure of a performance evaluation system for a current transformer provided in an embodiment of the present application;

[0057] Figure 3 A block diagram of the structure of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0060] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0061] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0062] With the continuous development of power systems and the improvement of their intelligence levels, current transformers play a vital role in power monitoring and protection. As a sensor device in a power system, current transformers are mainly used to measure current signals and convert them into low current signals proportional to them for subsequent measurement, control and protection of the power system. However, since the performance of current transformers directly affects the reliability and safety of power systems, it is particularly important to evaluate the performance of current transformers. In the prior art, when evaluating the performance of current transformers, a certain current is usually input into the current transformer under normal laboratory conditions, and the linearity of the output current and input current of the circuit transformer is detected to evaluate the performance of the current transformer. The accuracy and reliability of this evaluation method need to be improved. To this end, the present application provides a performance evaluation method and system for a current transformer to solve the above problems.

[0063] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0064] See also Figure 1 , Figure 1 A flow chart of a method for evaluating the performance of a current transformer provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the performance evaluation method of a current transformer provided in an embodiment of the present application includes steps S100 to S500.

[0065] Step S100, obtaining a test text of a current transformer from a database; wherein the test text of the current transformer includes specification information and application environment information of the current transformer.

[0066] Specifically, the database includes a plurality of encrypted texts, and obtaining the test text of the current transformer in the database includes the following steps:

[0067] Obtaining an identification code of the current transformer, and arranging the numbers in the identification code in sequence based on the sequence of the numbers in the identification code to obtain a digital sequence;

[0068] Performing frame processing on a preset video image to obtain image frames corresponding to the video image, and arranging the image frames in sequence based on the corresponding playback timing of each image frame in the video image to obtain a first image frame sequence;

[0069] For each number in the digital sequence, determine a target image frame corresponding to the number in the first image frame sequence; wherein the number corresponding to the order of the target image frame in the first image frame sequence is consistent with the number;

[0070] Arrange the target image frames in sequence based on the order of the numbers corresponding to the target image frames in the digital sequence to obtain a second image frame sequence;

[0071] Decryption processing is performed on each encrypted text in the database based on the second image frame sequence, and the encrypted text that is successfully decrypted is determined to be the test text.

[0072] It can be understood that in the above scheme, on the one hand, in order to ensure that each test text is not tampered with and to ensure the security of each test text, each test text is set as an encrypted text; on the other hand, in order to increase the difficulty of decrypting the test text, the second image frame sequence is generated based on the identification code and the video image, and each encrypted text is decrypted based on the second image frame sequence, which further improves the security of each encrypted text and helps to improve the accuracy and reliability of the performance evaluation method of the current transformer.

[0073] Step S200: determining an operating parameter information set of the current transformer based on the specification information; wherein the operating parameter information set includes a plurality of operating parameter information subsets, and each of the operating parameter information subsets is different from each other.

[0074] Among them, the specification information includes the parameter range of each working parameter of the current transformer. For example, the specification information is the grid frequency (50HZ, 60HZ) allowed to be connected to the current transformer, the current allowed to pass (1000A, 2000A) and the load allowed to be connected (100Ω, 200Ω).

[0075] Specifically, the specification information includes parameter intervals of a plurality of operating parameters, and determining the operating parameter information set of the current transformer based on the specification information includes:

[0076] For each of the working parameters, a target parameter value is determined within a parameter interval corresponding to the working parameter based on a preset parameter value algorithm to obtain a parameter value set corresponding to the working parameter;

[0077] Each parameter value in each parameter value set is matched one-to-one to obtain multiple working parameter information subsets; wherein a set consisting of all the working parameter information subsets is the working parameter information set.

[0078] For example, the specification information is the grid frequency (50HZ, 60HZ) allowed to be connected to the current transformer, the current allowed to pass (1000A, 2000A) and the load allowed to be connected (100Ω, 200Ω). The parameter value set corresponding to the grid frequency is (51HZ, 59HZ), the parameter value set corresponding to the current is (1001A, 1999A), and the parameter value set corresponding to the load is (99Ω, 199Ω ), the working parameter information set is {(51HZ, 1001A, 99Ω), (51HZ, 1001A, 199Ω), (51HZ, 1999A, 99Ω), (51HZ, 1999A, 199Ω), (59HZ, 1001A, 99Ω), (59HZ, 1001A, 199Ω), (59HZ, 1999A, 99Ω), (59HZ, 1999A, 199Ω)}.

[0079] It can be understood that in order to improve the accuracy and reliability of the performance evaluation method of the current transformer, obtaining multiple subsets of working parameter information through the specification information helps to achieve a comprehensive evaluation of the performance of the current transformer based on the specification information of the current transformer.

[0080] Step S300: determining a performance evaluation environment of the current transformer based on the application environment information.

[0081] Specifically, the application environment information includes historical environment parameter information of multiple environment parameters, and determining the performance evaluation environment of the current transformer based on the application environment information includes the following steps:

[0082] For each of the environmental parameters, determining an extreme environmental parameter value corresponding to the environmental parameter based on historical environmental parameter information corresponding to the environmental parameter;

[0083] A performance evaluation environment of the current transformer is determined based on each of the extreme environment parameter values.

[0084] Wherein, for each of the environmental parameters, the extreme environmental parameter value refers to the maximum environmental parameter value or the minimum environmental parameter value corresponding to the environmental parameter in the historical environmental parameter information. The maximum environmental parameter value or the minimum environmental parameter value is determined as the extreme environmental parameter value based on the specific impact of the environmental parameter on the working performance of the current transformer.

[0085] It can be understood that if the current transformer can work normally under the performance evaluation environment determined by each of the extreme environmental parameter values, it means that the performance of the current transformer is qualified. The performance evaluation environment determined by the above method helps to improve the accuracy of the performance evaluation method of the current transformer.

[0086] Step S400: for each of the operating parameter information subsets, in the performance evaluation environment, controlling the preset operating time of the current transformer based on the operating parameter information subset, and obtaining a target stability coefficient of the current transformer during operation.

[0087] Specifically, in the performance evaluation environment, controlling the preset working time of the current transformer based on the working parameter information subset, and obtaining the target stability coefficient of the current transformer during the working process, includes the following steps:

[0088] Using simulation technology to construct a virtual environment corresponding to the performance evaluation environment;

[0089] Using simulation technology to construct a virtual current transformer corresponding to the current transformer, and placing the virtual current transformer in the virtual environment;

[0090] Using simulation technology, setting the working state corresponding to the virtual current transformer based on the working parameter information subset, and maintaining the working state for the preset time, and obtaining the input current information and output current information corresponding to the virtual current transformer in the working state;

[0091] The target stability coefficient is acquired based on the input current information and the output current information.

[0092] Understandably, there are some safety risks when testing in high-voltage power systems. This solution uses simulation technology for virtual testing to avoid these safety risks and improve the safety of the evaluation process.

[0093] Wherein, acquiring the target stability coefficient based on the input current information and the output current information comprises the following steps:

[0094] A first curve is drawn based on the input current information, and a second curve is drawn based on the output current information; wherein the first curve is a curve showing that the input current of the virtual current transformer changes with time, and the second curve is a curve showing that the output current of the virtual current transformer changes with time;

[0095] Segmenting the first curve based on a preset curve segmentation rule to obtain a plurality of first curve segments, and segmenting the second curve based on a preset curve segmentation rule to obtain a plurality of second curve segments;

[0096] For each of the first curve segments, determining a second curve segment corresponding to the first curve segment, and obtaining a similarity between the first curve segment and the second curve segment corresponding to the first curve segment;

[0097] Determine the minimum similarity among the similarities as a first intermediate stability coefficient, and determine the difference between the maximum similarity and the minimum similarity among the similarities as a second intermediate stability coefficient;

[0098] A ratio of the first intermediate stability coefficient to the second intermediate stability coefficient is determined as the target stability coefficient.

[0099] It can be understood that, in this solution, by segmenting the first curve and the second curve respectively to obtain a plurality of first curve segments and a plurality of second curve segments, and comparing the similarity of each pair of corresponding first curve segments and second curve segments, the stability of the current transformer can be evaluated more precisely.

[0100] Step S500: Evaluate the performance of the current transformer based on each of the target stability coefficients.

[0101] Specifically, the performance evaluation of the current transformer based on each of the target stability coefficients includes the following steps:

[0102] Comparing each of the target stability coefficients with a preset stability coefficient respectively;

[0103] If each of the target stability coefficients is not less than the preset stability coefficient, it is determined that the performance of the current transformer is qualified.

[0104] The method provided in this embodiment, on the one hand, can fully understand the design parameters and working environment of the current transformer by obtaining the specification information and application environment information of the current transformer. In this way, a corresponding performance evaluation scheme can be designed for specific specification information and application environment, which is more in line with the actual situation of the current transformer, and helps to improve the accuracy and reliability of the performance evaluation method of the current transformer. On the other hand, in this embodiment, each subset of working parameter information is a different combination of working parameters, which can cover a wider range of working conditions of the current transformer, thereby comprehensively evaluating the performance of the current transformer under different working conditions, which helps to further improve the accuracy and reliability of the performance evaluation method of the current transformer.

[0105] See also Figure 2 , Figure 2 The structure schematic block diagram of the performance evaluation system 100 of the current transformer provided in the embodiment of the present application is as follows: Figure 2 As shown, the performance evaluation system 100 of the current transformer includes:

[0106] The first acquisition module 110 is used to acquire a test text of a current transformer from a database; wherein the test text of the current transformer includes specification information and application environment information of the current transformer.

[0107] The first determination module 120 is used to determine the operating parameter information set of the current transformer based on the specification information; wherein the operating parameter information set includes multiple operating parameter information subsets, and each of the operating parameter information subsets is different from each other.

[0108] The second determination module 130 is configured to determine a performance evaluation environment of the current transformer based on the application environment information.

[0109] The second acquisition module 140 is used for controlling the preset working time of the current transformer based on the working parameter information subset for each of the working parameter information subsets in the performance evaluation environment, and obtaining a target stability coefficient of the current transformer during operation.

[0110] The evaluation module 150 is used to perform performance evaluation on the current transformer based on each of the target stability coefficients.

[0111] It should be noted that technicians in the relevant technical field can clearly understand that for the convenience and conciseness of description, the specific working process of the system and each module described above can refer to the corresponding process in the aforementioned current transformer performance evaluation method embodiment, and will not be repeated here.

[0112] The current transformer performance evaluation system 100 provided in the above embodiment can be implemented in the form of a computer program. The computer program can be used in Figure 3 The system is run on the terminal device 200 shown.

[0113] See also Figure 3 , Figure 3 The present invention provides a schematic block diagram of the structure of a terminal device 200 according to an embodiment of the present application. The terminal device 200 includes a processor 201 and a memory 202. The processor 201 and the memory 202 are connected via a device bus 203, wherein the memory 202 may include a non-volatile storage medium and an internal memory.

[0114] The non-volatile storage medium can store a computer program. The computer program includes program instructions, and when the program instructions are executed by the processor 201, the processor 201 can execute any of the above-mentioned current transformer performance evaluation methods.

[0115] The processor 201 is used to provide computing and control capabilities to support the operation of the entire terminal device 200.

[0116] The internal memory provides an environment for the operation of the computer program in the non-volatile storage medium. When the computer program is executed by the processor 201, the processor 201 can execute any of the above-mentioned current transformer performance evaluation methods.

[0117] Those skilled in the art will understand that Figure 3 The structure shown in the figure is only a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the terminal device 200 involved in the scheme of the present application. The specific terminal device 200 may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0118] It should be understood that the processor 201 may be a central processing unit (CPU), and the processor 201 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0119] In some embodiments, the processor 201 is used to run a computer program stored in the memory to implement the following steps:

[0120] Acquire a test text of a current transformer in a database; wherein the test text of the current transformer includes specification information and application environment information of the current transformer;

[0121] Determine the operating parameter information set of the current transformer based on the specification information; wherein the operating parameter information set includes a plurality of operating parameter information subsets, and each of the operating parameter information subsets is different from each other;

[0122] Determining a performance evaluation environment of the current transformer based on the application environment information;

[0123] For each of the subsets of operating parameter information, in the performance evaluation environment, based on the subset of operating parameter information, controlling the preset working time of the current transformer, and obtaining a target stability coefficient of the current transformer during the working process;

[0124] The performance of the current transformer is evaluated based on each of the target stability factors.

[0125] It should be noted that those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the terminal device 200 described above can refer to the corresponding process of the aforementioned current transformer performance evaluation method, which will not be repeated here.

[0126] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by one or more processors, the one or more processors implement the performance evaluation method of the current transformer provided in the embodiment of the present application.

[0127] The computer-readable storage medium may be an internal storage unit of the terminal device 200 in the aforementioned embodiment, such as a hard disk or memory of the terminal device 200. The computer-readable storage medium may also be an external storage device of the terminal device 200, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped with the terminal device 200.

[0128] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for evaluating the performance of a current transformer, characterized in that: include: Acquire a test text of a current transformer in a database; wherein the test text of the current transformer includes specification information and application environment information of the current transformer; Determine the operating parameter information set of the current transformer based on the specification information; wherein the operating parameter information set includes a plurality of operating parameter information subsets, and each of the operating parameter information subsets is different from each other; Determining a performance evaluation environment of the current transformer based on the application environment information; For each of the subsets of operating parameter information, in the performance evaluation environment, based on the subset of operating parameter information, controlling the preset working time of the current transformer, and obtaining a target stability coefficient of the current transformer during the working process; Performing performance evaluation on the current transformer based on each of the target stability coefficients; Wherein, in the performance evaluation environment, controlling the preset working time of the current transformer based on the working parameter information subset, and obtaining the target stability coefficient of the current transformer during the working process, includes: Using simulation technology to construct a virtual environment corresponding to the performance evaluation environment; Using simulation technology to construct a virtual current transformer corresponding to the current transformer, and placing the virtual current transformer in the virtual environment; Using simulation technology, setting the working state corresponding to the virtual current transformer based on the working parameter information subset, and maintaining the working state for the preset time, and obtaining the input current information and output current information corresponding to the virtual current transformer in the working state; A first curve is drawn based on the input current information, and a second curve is drawn based on the output current information; wherein the first curve is a curve showing that the input current of the virtual current transformer changes with time, and the second curve is a curve showing that the output current of the virtual current transformer changes with time; Segmenting the first curve based on a preset curve segmentation rule to obtain a plurality of first curve segments, and segmenting the second curve based on a preset curve segmentation rule to obtain a plurality of second curve segments; For each of the first curve segments, determining a second curve segment corresponding to the first curve segment, and obtaining a similarity between the first curve segment and the second curve segment corresponding to the first curve segment; Determine the minimum similarity among the similarities as a first intermediate stability coefficient, and determine the difference between the maximum similarity and the minimum similarity among the similarities as a second intermediate stability coefficient; A ratio of the first intermediate stability coefficient to the second intermediate stability coefficient is determined as the target stability coefficient.

2. The performance evaluation method of a current transformer according to claim 1, characterized in that: The specification information includes parameter intervals of a plurality of operating parameters, and determining the operating parameter information set of the current transformer based on the specification information includes: For each of the working parameters, a target parameter value is determined within a parameter interval corresponding to the working parameter based on a preset parameter value algorithm to obtain a parameter value set corresponding to the working parameter; Each parameter value in each parameter value set is matched one-to-one to obtain multiple working parameter information subsets; wherein a set consisting of all the working parameter information subsets is the working parameter information set.

3. The performance evaluation method of a current transformer according to claim 1, characterized in that: The application environment information includes historical environment parameter information of multiple environment parameters, and determining the performance evaluation environment of the current transformer based on the application environment information includes: For each of the environmental parameters, determining an extreme environmental parameter value corresponding to the environmental parameter based on historical environmental parameter information corresponding to the environmental parameter; A performance evaluation environment of the current transformer is determined based on each of the extreme environment parameter values.

4. The performance evaluation method of a current transformer according to claim 1, characterized in that: The performing performance evaluation on the current transformer based on each of the target stability coefficients includes: Comparing each of the target stability coefficients with a preset stability coefficient respectively; If each of the target stability coefficients is not less than the preset stability coefficient, it is determined that the performance of the current transformer is qualified.

5. The performance evaluation method of a current transformer according to claim 1, characterized in that: The step of obtaining the test text of the current transformer in the database includes: Obtaining an identification code of the current transformer, and arranging the numbers in the identification code in sequence based on the sequence of the numbers in the identification code to obtain a digital sequence; Performing frame processing on a preset video image to obtain image frames corresponding to the video image, and arranging the image frames in sequence based on the corresponding playback timing of each image frame in the video image to obtain a first image frame sequence; For each number in the digital sequence, determine a target image frame corresponding to the number in the first image frame sequence; wherein the number corresponding to the order of the target image frame in the first image frame sequence is consistent with the number; Arrange the target image frames in sequence based on the order of the numbers corresponding to the target image frames in the digital sequence to obtain a second image frame sequence; Decryption processing is performed on each encrypted text in the database based on the second image frame sequence, and the encrypted text that is successfully decrypted is determined to be the test text.

6. A performance evaluation system for a current transformer, characterized in that: include: A first acquisition module is used to acquire a test text of a current transformer from a database; wherein the test text of the current transformer includes specification information and application environment information of the current transformer; A first determination module, configured to determine a working parameter information set of the current transformer based on the specification information; wherein the working parameter information set includes a plurality of working parameter information subsets, and each of the working parameter information subsets is different from each other; A second determination module, configured to determine a performance evaluation environment of the current transformer based on the application environment information; A second acquisition module is used for controlling the preset working time of the current transformer based on the working parameter information subset for each of the working parameter information subsets in the performance evaluation environment, and obtaining a target stability coefficient of the current transformer during the working process; An evaluation module, configured to perform performance evaluation on the current transformer based on each of the target stability coefficients; Wherein, the second acquisition module includes: A first construction unit is used to construct a virtual environment corresponding to the performance evaluation environment by using simulation technology; A second construction unit is used to construct a virtual current transformer corresponding to the current transformer by using a simulation technology, and place the virtual current transformer in the virtual environment; A first acquisition unit is used to use simulation technology to set the working state corresponding to the virtual current transformer based on the working parameter information subset, and to maintain the working state for the preset time, and to obtain input current information and output current information corresponding to the virtual current transformer in the working state; A second acquisition unit is used to acquire the target stability coefficient based on the input current information and the output current information; including: drawing a first curve based on the input current information, and drawing a second curve based on the output current information; wherein the first curve is a curve showing that the input current of the virtual current transformer changes with time, and the second curve is a curve showing that the output current of the virtual current transformer changes with time; segmenting the first curve based on a preset curve segmentation rule to obtain a plurality of first curve segments, and segmenting the second curve based on a preset curve segmentation rule to obtain a plurality of second curve segments; for each of the first curve segments, determining the second curve segment corresponding to the first curve segment, and acquiring the similarity between the first curve segment and the second curve segment corresponding to the first curve segment; determining the minimum similarity among each of the similarities as the first intermediate stability coefficient, and determining the difference between the maximum similarity and the minimum similarity among each of the similarities as the second intermediate stability coefficient; determining the ratio of the first intermediate stability coefficient to the second intermediate stability coefficient as the target stability coefficient.

7. The performance evaluation system of a current transformer according to claim 6, characterized in that: The second acquisition module includes: A first construction unit is used to construct a virtual environment corresponding to the performance evaluation environment by using simulation technology; A second construction unit is used to construct a virtual current transformer corresponding to the current transformer by using a simulation technology, and place the virtual current transformer in the virtual environment; A first acquisition unit is used to use simulation technology to set the working state corresponding to the virtual current transformer based on the working parameter information subset, and to maintain the working state for the preset time, and to obtain input current information and output current information corresponding to the virtual current transformer in the working state; The second acquisition unit is used to acquire the target stability coefficient based on the input current information and the output current information.

8. The performance evaluation system of a current transformer according to claim 6, characterized in that: The first acquisition module includes: A third acquisition unit is used to acquire the identification code of the current transformer, and arrange the numbers in the identification code in sequence based on the sequence of the numbers in the identification code to obtain a digital sequence; A first processing unit is used to perform frame processing on a preset video image to obtain image frames corresponding to the video image, and to arrange the image frames in sequence based on the corresponding playback timing of each image frame in the video image to obtain a first image frame sequence; a determination unit, configured to determine, for each number in the digital sequence, a target image frame corresponding to the number in the first image frame sequence; wherein the number corresponding to the order of the target image frame in the first image frame sequence is consistent with the number; A sorting unit, configured to arrange the target image frames in sequence based on the order of the numbers corresponding to the target image frames in the digital sequence, so as to obtain a second image frame sequence; The second processing unit is used to decrypt each encrypted text in the database based on the second image frame sequence, and determine that the encrypted text that is successfully decrypted is the test text.

Images