A portable relay protection trip matrix test system and method

Abstract

The present invention provides a portable relay protection tripping matrix test system and method, the system comprising a predefined module, a test execution module, a storage and analysis module, an interface module and a power module; the predefined module is used to read and store a test scheme predefined by a user; the test execution module is used to execute a test process for a relay protection device and record the test result; the storage and analysis module is used to store and analyze historical test results of the relay protection device to evaluate the performance of the relay protection device; the interface module is used to provide a connection interface with a relay protection device to be tested and an external power system; the power module is used to provide power support for the test system; the present invention provides a flexible and efficient test scheme by integrating efficient data storage and analysis, a multi-functional interface and self-power supply capability, and provides accurate performance evaluation and maintenance prediction for various types of relay protection devices.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power operation and maintenance systems, and in particular to a portable relay protection tripping matrix testing system and method. Background Art

[0002] In modern power systems, the reliability of relay protection devices is crucial to ensuring the stable operation and safety of the power grid. As the complexity of the power grid increases, the verification and maintenance of the relay protection system becomes more complicated and time-consuming, especially in dealing with the efficiency of tripping logic and protection actions. Traditional testing methods often require multiple tests and complex configurations, which are not only time-consuming but also prone to human errors, and require high skills from operators, increasing the difficulty and cost of power system maintenance. Therefore, developing a fast, accurate and portable test system for evaluating and maintaining relay protection devices has become an important requirement for improving the reliability and efficiency of power systems.

[0003] After consulting the related disclosed technical solutions, the technology with the publication number CN114814565A proposes a relay protection trip matrix verification system, including a verification instrument, the verification instrument is connected to several acquisition terminals, the acquisition terminals are connected to the output nodes of the relay protection trip matrix device, and are used to collect relay action signals; the verification instrument is electrically connected to the local alarm and the relay protection tester respectively, and the verification instrument is connected to the mobile terminal and the host computer. When testing by the verification instrument, each type of protection is tested only once, and there is no need to verify the secondary wiring on the opposite side, and the use of wireless radio frequency technology can be used for synchronous testing of multiple test branches, which reduces a lot of redundant and repeated work, reduces the mistakes of operators, greatly improves the protection verification efficiency, and can greatly shorten the verification time and can fully record all the time and order of the trip output relay; but this scheme requires a test for each type of protection, and the testing process is relatively cumbersome; and it lacks the short-term performance evaluation and long-term maintenance predictive diagnosis functions of the device. Summary of the invention

[0004] The purpose of the present invention is to propose a portable relay protection trip matrix test system and method to address the current deficiencies.

[0005] The present invention adopts the following technical solution:

[0006] A portable relay protection trip matrix test system, the system comprising a predefined module, a test execution module, a storage and analysis module, an interface module and a power supply module;

[0007] The predefined module is used to read and store the test scheme predefined by the user; the test execution module is used to execute the test process for the relay protection device and record the test results; the storage and analysis module is used to store and analyze the historical test results of the relay protection device to evaluate the performance of the relay protection device; the interface module is used to provide a connection interface with the relay protection device to be tested and the external power system; the power supply module is used to provide power support for the test system;

[0008] The predefined module includes a pre-writing unit, a real-time modification unit and a scheme storage unit; the pre-writing unit is used to complete the writing of the test scheme by the user, and the content of the test scheme includes the user-defined test scheme name, test object, test input, test logic and performance index; the real-time modification unit is used to allow the user to adjust or modify the written test scheme during the test process; the scheme storage unit is used to store the test scheme written by the user for the user to adjust and call;

[0009] The test results recorded by the test execution module include the correctness of the tripping logic, the response time and the test time;

[0010] Furthermore, the storage and analysis module includes a performance evaluation unit and a long-term maintenance evaluation unit; the performance evaluation unit is used to evaluate the recent performance of the relay protection device according to the historical test results of each relay protection device; the long-term maintenance evaluation unit is used to complete the evaluation of the long-term maintenance of the relay protection device according to the evaluation results of the performance evaluation unit;

[0011] Furthermore, the performance evaluation unit includes a record storage unit, a record update unit and a performance evaluation unit; the record storage unit is used to store the recent historical test results of each relay protection device; the record update unit is used to update the recent historical test results in the record storage unit after each test is completed; the performance evaluation unit is used to complete the evaluation of the recent operating status of the relay protection device according to the recent historical test results;

[0012] Furthermore, the record storage unit provides a storage window for each relay protection device to complete the storage of recent historical test results of each relay protection device; the number of test result records that can be stored in the storage window is set to n; for each relay protection device, after each test is completed, the record update unit deletes the test result farthest from the current time in the storage window corresponding to the relay protection device, and updates the latest test result to the storage window;

[0013] Furthermore, the performance evaluation unit completes the evaluation of the recent operating status of each relay protection device through the following formula:

[0014]

[0015] Wherein, P is the operating status evaluation value of a certain relay protection device, and the higher the operating status evaluation value, the worse the operating status of the corresponding relay protection device; α i is the weight value of the relay protection device on the i-th historical test result, c i is the number of tripping logic errors of the relay protection device on the i-th historical test result, d i is the response time evaluation coefficient of the relay protection device when the tripping logic is correct on the i-th historical test result;

[0016] Further, the long-term maintenance evaluation unit includes an evaluation information storage unit, an evaluation information updating unit and a long-term evaluation unit; the evaluation information storage unit is used to store the evaluation result of the performance evaluation unit, and the evaluation result is the operating status evaluation value of each relay protection device; the evaluation information updating unit is used to update the evaluation result stored in the evaluation information storage unit, and the long-term evaluation unit is used to complete the evaluation of the long-term maintenance of each relay protection device according to the evaluation result in the evaluation information storage unit;

[0017] A portable relay protection trip matrix testing method, the method comprising the following steps:

[0018] S1: The user writes a test plan in advance, and the test plan includes a test plan name, a test object, a test input, a test logic, and a performance indicator;

[0019] S2: Connect the test system to the relay protection device to be tested through the interface module, and ensure that all necessary hardware interfaces are correctly configured to support signal transmission and device communication;

[0020] S3: Execute the test on the relay protection device according to the test plan set by the user. During this process, the user can modify the pre-set test plan through the real-time modification unit if necessary;

[0021] S4: After the test is completed, the test result of the test is provided to the user;

[0022] S5: The test results are input into the storage and analysis module, and an evaluation of the recent operating status and long-term maintenance of the relay protection device is performed. After the evaluation is completed, the user provides relevant evaluation information to help the user understand the operation and maintenance of the relay protection device.

[0023] The beneficial effects achieved by the present invention are:

[0024] The present invention realizes one-stop relay protection device testing and performance evaluation by integrating a predefined module, a test execution module, a storage and analysis module, an interface module and a power module; various test conditions in the test plan can be pre-set through the predefined module, which facilitates standardization and automation in the test process; the short-term performance and long-term maintenance of the relay protection device are evaluated through the storage and analysis module, which provides an accurate scientific basis for the inspection and maintenance of the relay protection device; in addition, the interface module and the power module enable the system to adapt to various field conditions, provide an efficient and flexible testing experience, significantly improve operating efficiency and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0026] Figure 1 It is a schematic diagram of the overall module of the present invention.

[0027] Figure 2 Schematic diagram of the working process of the performance evaluation unit of the present invention.

[0028] Figure 3 This is a schematic diagram of the workflow of the long-term maintenance evaluation unit of the present invention.

[0029] Figure 4 It is a flow chart of the portable relay protection tripping matrix testing method of the present invention. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention; for those skilled in the art, other systems, methods and / or features of the present embodiment will become apparent after reviewing the following detailed description; it is intended that all such additional systems, methods, features and advantages are included in this specification; included within the scope of the present invention and protected by the appended claims; additional features of the disclosed embodiments are described in the following detailed description, and these features will be apparent from the following detailed description.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] Embodiment 1:

[0033] like Figure 1 As shown, this embodiment provides a portable relay protection trip matrix test system, the system includes a predefined module, a test execution module, a storage and analysis module, an interface module and a power supply module;

[0034] The predefined module is used to read and store the test scheme predefined by the user; the test execution module is used to execute the test process for the relay protection device and record the test results; the storage and analysis module is used to store and analyze the historical test results of the relay protection device to evaluate the performance of the relay protection device; the interface module is used to provide a connection interface with the relay protection device to be tested and the external power system; the power supply module is used to provide power support for the test system;

[0035] The predefined module includes a pre-writing unit, a real-time modification unit and a scheme storage unit; the pre-writing unit is used to complete the writing of the test scheme by the user, and the content of the test scheme includes the user-defined test scheme name, test object, test input, test logic and performance index; the real-time modification unit is used to allow the user to adjust or modify the written test scheme during the test process; the scheme storage unit is used to store the test scheme written by the user for the user to adjust and call;

[0036] Specifically, the test scheme name is a unique name defined for each test scheme for user identification and reference; the test object is the type and model of the specific relay protection device involved in the test; the test input is the binary input signal required for the test, such as the current and voltage change signal; the test logic is the operation sequence of the relay protection device performing a trip response after receiving a specific binary input signal; the performance indicator is the maximum allowable time for the relay protection device to respond to the binary input signal

[0037] The test results recorded by the test execution module include the correctness of the tripping logic, the response time and the test time;

[0038] Furthermore, the storage and analysis module includes a performance evaluation unit and a long-term maintenance evaluation unit; the performance evaluation unit is used to evaluate the recent performance of the relay protection device according to the historical test results of each relay protection device; the long-term maintenance evaluation unit is used to complete the evaluation of the long-term maintenance of the relay protection device according to the evaluation results of the performance evaluation unit;

[0039] Further, such as Figure 2 As shown, the performance evaluation unit includes a record storage unit, a record update unit and a performance evaluation unit; the record storage unit is used to store the recent historical test results of each relay protection device; the record update unit is used to update the recent historical test results in the record storage unit after each test is completed; the performance evaluation unit is used to complete the evaluation of the recent operating status of the relay protection device according to the recent historical test results;

[0040] Furthermore, the record storage unit provides a storage window for each relay protection device to complete the storage of recent historical test results of each relay protection device; the number of test result records that can be stored in the storage window is set to n; for each relay protection device, after each test is completed, the record update unit deletes the test result farthest from the current time in the storage window corresponding to the relay protection device, and updates the latest test result to the storage window;

[0041] Furthermore, the performance evaluation unit completes the evaluation of the recent operating status of each relay protection device through the following formula:

[0042]

[0043] Wherein, P is the operating status evaluation value of a certain relay protection device, and the higher the operating status evaluation value, the worse the operating status of the corresponding relay protection device; α i is the weight value of the relay protection device on the i-th historical test result, c i is the number of tripping logic errors of the relay protection device on the i-th historical test result, d i is the response time evaluation coefficient of the relay protection device when the tripping logic is correct on the i-th historical test result;

[0044] Furthermore, for α i Satisfy the following formula:

[0045] α i =exp(-γ·s i );

[0046] Among them, s i is the difference between the test time of the i-th historical test result and the current time, γ is the time adjustment coefficient, which is set by pre-experimentation;

[0047] Furthermore, for d i Satisfy the following formula:

[0048]

[0049] Among them, k i,j is the excess response coefficient of the relay protection device when the jth tripping logic is correct on the i-th historical test result, m is the number of times the relay protection device trips correctly on the i-th historical test result; for k i,i Satisfy the following formula:

[0050]

[0051] Among them, t i,j is the response time of the relay protection device when the jth tripping logic is correct on the i-th historical test result, t y is a preset response time benchmark qualification threshold;

[0052] By integrating multiple recent historical test results and assigning different weights to each historical test result based on the distance from the current time, the sensitivity and accuracy of the evaluation are enhanced, allowing the system to more effectively reflect the real-time operating status of the relay protection device and promptly identify potential performance problems; by comprehensively considering the correctness of the tripping logic and the response time, the operating efficiency and reliability of the relay protection device can be fully evaluated, providing strong data support for maintenance decisions.

[0053] Embodiment 2:

[0054] This embodiment should be understood to include at least all the features of any of the above embodiments, and further improve upon them;

[0055] This embodiment provides a portable relay protection trip matrix test system, the system comprising a pre-defined module, a test execution module, a storage and analysis module, an interface module and a power supply module;

[0056] The predefined module is used to read and store the test scheme predefined by the user; the test execution module is used to execute the test process for the relay protection device and record the test results; the storage and analysis module is used to store and analyze the historical test results of the relay protection device to evaluate the performance of the relay protection device; the interface module is used to provide a connection interface with the relay protection device to be tested and the external power system; the power supply module is used to provide power support for the test system;

[0057] The storage and analysis module includes a performance evaluation unit and a long-term maintenance evaluation unit; the performance evaluation unit is used to evaluate the recent performance of the relay protection device according to the historical test results of each relay protection device; the long-term maintenance evaluation unit is used to complete the evaluation of the long-term maintenance of the relay protection device according to the evaluation results of the performance evaluation unit;

[0058] Further, such as Figure 3 As shown, the long-term maintenance evaluation unit includes an evaluation information storage unit, an evaluation information updating unit and a long-term evaluation unit; the evaluation information storage unit is used to store the evaluation result of the performance evaluation unit, and the evaluation result is the operating state evaluation value of each relay protection device; the evaluation information updating unit is used to update the evaluation result stored in the evaluation information storage unit, and the long-term evaluation unit is used to complete the evaluation of the long-term maintenance of each relay protection device according to the evaluation result in the evaluation information storage unit;

[0059] Furthermore, the evaluation results stored in the evaluation information storage unit are evaluation results corresponding to the historical test results within the continuous acquisition cycle; that is, the evaluation results within each acquisition cycle correspond to the evaluation results obtained based on n historical test results, and the historical test results within each acquisition cycle are all historical test results of a continuous sequence after the previous acquisition cycle; and for each relay protection device, the evaluation information storage unit stores a total of n evaluation result records about the relay protection device; the evaluation information update unit is used to delete the evaluation result farthest from the current time in the evaluation information storage unit after obtaining the evaluation result within the new acquisition cycle, and add the evaluation result within the new acquisition cycle to the evaluation information storage unit;

[0060] Furthermore, the long-term evaluation unit completes the evaluation of the long-term maintenance of each relay protection device in the following manner:

[0061] For each relay protection device, the corresponding evaluation result sequence in the evaluation information storage unit is set to P1, P2, P3, ..., P n , where P1 is the evaluation result farthest from the current time in the evaluation result sequence, and P n It is the evaluation result closest to the current time in the evaluation result sequence; the change between adjacent evaluation results is defined as:

[0062] ΔP k =P k -P k-1 ;

[0063] Among them, ΔP k is the change between the kth evaluation result and its previous evaluation result, satisfying 2≤k≤n; calculate the comprehensive trend score T of the relay protection device:

[0064]

[0065]

[0066] Among them, S k is the trend coefficient corresponding to the kth evaluation result; ρ and σ are the preset amplification adjustment coefficients; when the comprehensive trend score T is greater than 0, it is determined that the performance of the relay protection device has degraded; and a message is sent to the user that the relay protection device needs maintenance; when the comprehensive trend score T is less than or equal to 0, it is determined that the performance of the relay protection device is stable and no additional maintenance measures are required;

[0067] The evaluation information storage unit significantly reduces the amount of data storage by storing the evaluation results of the relay protection device instead of each detailed historical test data, thereby not only optimizing the use of storage space, but also improving data processing efficiency, allowing the system to quickly access and analyze key performance evaluation information; the evaluation information update unit regularly updates the evaluation results in the evaluation information storage unit, ensuring the timeliness and relevance of the data, thereby providing continuously updated and accurate decision support for the long-term maintenance of the relay protection device; the long-term evaluation unit can more accurately reflect the performance change trend of the relay protection device by calculating the dynamic change between each evaluation result and assigning different weights to them, and by calculating and analyzing the comprehensive trend score of each relay protection device, it can achieve early warning of future performance degradation of the relay protection device and more targeted maintenance intervention;

[0068] Furthermore, the interface provided by the interface module for connecting the relay protection device to be tested can process 16 sets of input signals, and the input signals can be empty contacts or contacts with points, which can fully meet the use requirements of the actual application output matrix;

[0069] Furthermore, the power module supplies power to the system through a high-efficiency lithium battery, which reduces the volume of the overall test system equipment and improves the portability and versatility of the test system;

[0070] like Figure 4 As shown, this embodiment also provides a portable relay protection trip matrix testing method, the method comprising the following steps:

[0071] S1: The user writes the test plan in advance. The test plan includes the test plan name, test object, test input, test logic and performance indicators;

[0072] S2: Connect the test system to the relay protection device to be tested through the interface module, and ensure that all necessary hardware interfaces are correctly configured to support signal transmission and device communication;

[0073] S3: Execute the test on the relay protection device according to the test plan set by the user. During this process, the user can modify the pre-set test plan through the real-time modification unit if necessary;

[0074] S4: After the test is completed, the test result of the test is provided to the user;

[0075] S5: The test results are input into the storage and analysis module, and an evaluation of the recent operating status and long-term maintenance of the relay protection device is performed. After the evaluation is completed, the user provides relevant evaluation information to help the user understand the operation and maintenance of the relay protection device.

[0076] The contents disclosed above are only preferred feasible embodiments of the present invention, and do not limit the protection scope of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention specification and drawings are included in the protection scope of the present invention. In addition, the elements therein can be updated as technology develops.

Claims

1. A portable relay protection trip matrix test system, characterized in that: The system includes a pre-defined module, a test execution module, a storage analysis module, an interface module and a power supply module; The predefined module is used to read and store the test scheme predefined by the user; The test execution module is used to execute the test process for the relay protection device and record the test results; The storage and analysis module is used to store and analyze the historical test results of the relay protection device to evaluate the performance of the relay protection device; the interface module is used to provide a connection interface with the relay protection device to be tested and the external power system; the power supply module is used to provide power supply support for the test system; The predefined module includes a pre-writing unit, a real-time modification unit and a scheme storage unit; the pre-writing unit is used to complete the user's writing of the test scheme, and the content of the test scheme includes the user-defined test scheme name, test object, test input, test logic and performance indicators; the real-time modification unit is used to allow the user to adjust or modify the written test scheme during the test process; The scheme storage unit is used to store the test scheme written by the user so that the user can adjust and call it; The test results recorded by the test execution module include the correctness of the tripping logic, the response time and the test time; the storage analysis module includes a recent performance evaluation unit and a long-term maintenance evaluation unit; the recent performance evaluation unit is used to evaluate the recent performance of the relay protection device according to the historical test results of each relay protection device; the long-term maintenance evaluation unit is used to complete the evaluation of the long-term maintenance of the relay protection device according to the evaluation results of the recent performance evaluation unit; The recent performance evaluation unit includes a record storage unit, a record update unit and a performance evaluation unit; the record storage unit is used to store the recent historical test results of each relay protection device; the record update unit is used to update the recent historical test results in the record storage unit after each test is completed; the performance evaluation unit is used to complete the evaluation of the recent operating status of the relay protection device according to the recent historical test results; The record storage unit provides a storage window for each relay protection device to complete the storage of recent historical test results of each relay protection device; Set the test results that can be stored in the storage window to be recorded as For each relay protection device, after each test is completed, the record update unit deletes the test result farthest from the current time in the storage window corresponding to the relay protection device, and updates the latest test result to the storage window; the performance evaluation unit completes the evaluation of the recent operating status of each relay protection device through the following formula: ； in, is an operating status evaluation value of a certain relay protection device, wherein a higher operating status evaluation value indicates a worse operating status of the corresponding relay protection device; For the relay protection device The weight value of the historical test results. For the relay protection device The number of trip logic errors on the historical test results, For the relay protection device The response time evaluation coefficient when the tripping logic is correct on the historical test results; The long-term maintenance assessment unit includes an assessment information storage unit, an assessment information updating unit and a long-term evaluation unit; the assessment information storage unit is used to store the assessment results of the performance assessment unit, and the assessment results are the operating status assessment values ​​of each relay protection device; the assessment information updating unit is used to update the assessment results stored in the assessment information storage unit, and the long-term evaluation unit is used to complete the assessment of the long-term maintenance of each relay protection device based on the assessment results in the assessment information storage unit.

2. A portable relay protection trip matrix test method implemented by the portable relay protection trip matrix test system according to claim 1, characterized in that: The method comprises the following steps: S1: The user writes a test plan in advance, and the test plan includes a test plan name, a test object, a test input, a test logic, and a performance indicator; S2: Connect the test system to the relay protection device to be tested through the interface module, and ensure that all necessary hardware interfaces are correctly configured to support signal transmission and device communication; S3: Execute the test on the relay protection device according to the test plan set by the user. During this process, the user can modify the pre-set test plan through the real-time modification unit if necessary; S4: After the test is completed, the test result of the test is provided to the user; S5: The test results are input into the storage and analysis module, and an evaluation of the recent operating status and long-term maintenance of the relay protection device is performed. After the evaluation is completed, the user provides relevant evaluation information to help the user understand the operation and maintenance of the relay protection device.

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