Intelligent automatic test and control method and system for relay protection and measurement and control device

Abstract

The invention discloses an intelligent automatic test and control method and system for a relay protection and measurement and control device, and relates to the technical field of power system automation, and the method comprises the steps: building communication between a central synchronous automatic test platform and at least two relay protection testers which are respectively connected to a to-be-tested device; the platform defines a whole-station test job comprising a plurality of independent single-device test tasks; the platform executes an intelligent task scheduling process, and automatically selects a to-be-executed task from the operation and issues the task by continuously monitoring the working states of the testers when detecting that any tester is idle; the testers receiving the task autonomously execute a closed-loop automated test sequence. The corresponding system is a central platform provided with a task scheduling module, a tester communication interface and a database. According to the invention, by constructing a test system with centralized scheduling and parallel execution, the serialized workflow is converted into efficient system-level automatic operation, and the test efficiency of the whole station is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power system automation, in particular to a method and system for intelligent automation testing and control of relay protection and measurement and control devices. BACKGROUND

[0002] The relay protection and measurement and control devices of a power system are key equipment for ensuring the safe and stable operation of a power grid. With the increasing digitalization and intelligentization of substations, the functions of protection devices are becoming increasingly complex, and the testing technology for their commissioning, periodic inspection and maintenance work is required to be more efficient and reliable.

[0003] Currently, the automation testing technology for relay protection devices has been developed to some extent. There are test instruments on the market that can automatically verify the specific protection function logic of a single protection device according to a preset program. These instruments can usually parse the substation configuration description (SCD) file in compliance with the IEC 61850 standard to assist the test personnel in communication configuration, and can simulate various fault waveforms to interact with the protection device to determine whether its action is correct. Some advanced test systems even have the ability to synchronously output signals from multiple instruments to test complex protection schemes such as differential protection that require multi-terminal coordinated action.

[0004] However, the existing technology still has significant limitations. Its automation capabilities mainly focus on optimizing the testing process of “single device” or “single protection scheme”. In the face of “whole-station-level” testing projects for dozens or even hundreds of protection devices in a substation, the existing technology mode exposes its fundamental efficiency bottleneck. The testing workflow is still essentially serial, i.e., the test personnel need to complete the cycle of “connecting devices -> configuring tests -> executing -> recording results -> replacing the next device” one by one, or multiple personnel need to operate in parallel but lack unified coordination. This mode results in long overall duration and large manpower investment. In addition, the work of configuring test parameters for each device and managing test data is still tedious, and the modification and restoration of device configurations during the testing process mostly rely on manual operation, which poses safety risks and the possibility of omissions. Therefore, the existing technology lacks an effective solution that can manage, intelligently schedule and execute multiple independent testing tasks in a whole-station range in a unified manner from a system level. SUMMARY

[0005] The present application provides a method and system for intelligent automation testing and control of relay protection and measurement and control devices, which aims to solve the fundamental efficiency bottleneck faced by the testing and verification process of secondary equipment of a power system, particularly relay protection and measurement and control devices, in the commissioning of newly built substations, the modification of existing substations or daily periodic inspection work.

[0006] In view of the above problems, in a first aspect, the present application provides a method for intelligent automatic testing and control of relay protection and measurement and control devices, the method comprising the following steps: establishing a communication connection between a central synchronous automatic testing platform and at least two relay protection testers, wherein the at least two relay protection testers are respectively connected to at least two relay protection and measurement and control devices to be tested; defining a full-station test job comprising a plurality of independent single-device test tasks on the synchronous automatic testing platform; executing an intelligent task scheduling process by the synchronous automatic testing platform, the task scheduling process comprising continuously monitoring real-time working states of the at least two relay protection testers, and when detecting that any one of the relay protection testers becomes idle, automatically selecting a single-device test task to be executed from the plurality of single-device test tasks in the full-station test job and issuing the task to the idle relay protection tester; automatically executing a closed-loop automatic testing sequence by the relay protection tester receiving the single-device test task on the relay protection and measurement and control device to be tested.

[0007] In a second aspect, the present application further provides a system for intelligent automatic testing and control of relay protection and measurement and control devices, the system comprising: at least two relay protection testers, each relay protection tester being configured to be connected to a relay protection and measurement and control device to be tested and to automatically execute a closed-loop automatic testing sequence on the device; a central synchronous automatic testing platform connected to the at least two relay protection testers through a communication network; wherein the synchronous automatic testing platform is configured to execute an intelligent task scheduling process to realize cooperative control of the at least two relay protection testers, the task scheduling process comprising continuously monitoring real-time working states of the at least two relay protection testers, and when detecting that any one of the relay protection testers becomes idle in a full-station test job comprising a plurality of independent single-device test tasks, automatically selecting a single-device test task to be executed from the full-station test job and issuing the task to the idle relay protection tester.

[0008] The technical scheme provided by the present application has at least the following technical effects or advantages: The application converts the traditional serialized test process into a multi-task parallel automatic operation process by constructing a central scheduling platform and a system architecture that cooperates with multiple testers. Through intelligent task scheduling, the system can maximize the use of on-site test resources, realize simultaneous testing of multiple protection devices, thereby doubling or even orders of magnitude shortening the overall duration of the whole station test project, and solving the core pain point of low efficiency of the prior art in the face of large-scale test tasks.

[0009] The application prepositions and knowledge bases the tedious, repetitive and error-prone test preparation work by introducing an offline design and database construction mechanism of the test scheme, especially by analyzing the protection device model to assist or even automatically generate a standardized test scheme. Field personnel only need to retrieve the scheme according to the equipment model to execute, which greatly reduces the workload of on-site configuration and improves the standardization level and accuracy of the test process.

[0010] By automatically completing the complex scheduling, configuration, execution and recovery, etc. by the system, the application liberates the test personnel from a large number of repetitive and procedural operations, so that they can focus more on the analysis and processing of abnormal problems. The systematic operation process also reduces the excessive dependence on the personal skills and experience of the on-site personnel, so that the quality of the overall test work is more uniform and controllable. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 A flow chart of the relay protection and measurement and control device intelligent automatic test and control method of the application; Figure 2 A system architecture diagram of the relay protection and measurement and control device intelligent automatic test and control system of the application. DETAILED DESCRIPTION

[0012] To make the purpose, technical scheme and advantages of the application more clear and complete, the relay protection and measurement and control device intelligent automatic test and control method and system of the application will be described in detail below with reference to the preferred embodiment and the accompanying drawings. It should be understood that the specific embodiments described herein are intended to illustrate the core technical ideas and specific implementation paths of the application in an engineering end-to-end scenario, rather than any form of limitation on the protection scope of the application. Based on the entire content disclosed in the specification, any equivalent modification, combination or improvement of the technical scheme made by those skilled in the art without any creative labor shall fall within the protection scope of the application.

[0013] The method and system of the present application aim to solve the fundamental efficiency bottleneck faced by the test and verification process of secondary equipment of power systems, especially relay protection and measurement and control devices, in the commissioning of newly-built substations, the reconstruction of existing substations or daily maintenance work. The limitation of the prior art is that even if single-machine automatic test technology is adopted, the test mode is still essentially a serialized workflow of "single test instrument for single protection device". In a full-station test project involving dozens or even hundreds of protection devices, the test personnel need to frequently change equipment lines, reconfigure communication, manually retrieve test programs and manually aggregate scattered test reports, resulting in huge time consumption, intensive labor input and the introduction of errors or omissions due to the uneven technical level of personnel, which seriously restricts the overall quality and efficiency of power grid construction and operation.

[0014] The core technical idea of the present application is to build a multi-camera synchronous automatic test platform. As a centralized intelligent brain, the platform can manage and control multiple relay protection testers deployed in the station, and intelligently assign pre-designed and standardized test tasks to these testers, enabling them to perform automatic tests on different protection and measurement and control devices in the station in parallel and cooperatively. In this way, the originally time-consuming serialized test process is transformed into efficient, parallel-executable system-level automatic operation, thereby fundamentally solving the problems of low efficiency and heavy reliance on manpower faced by the prior art.

[0015] Please refer to Figure 1 , an intelligent automatic test and control method for relay protection and measurement and control devices, the method comprising the following steps: Establish a communication connection between a central synchronous automatic test platform and at least two relay protection testers, wherein the at least two relay protection testers are respectively connected to at least two relay protection and measurement and control devices to be tested; Define a full-station test job containing multiple independent single-device test tasks on the synchronous automatic test platform; Perform an intelligent task scheduling process by the synchronous automatic test platform, the task scheduling process comprising: continuously monitoring the real-time working status of the at least two relay protection testers, and when detecting that any one of the relay protection testers is in an idle state, automatically selecting a single-device test task to be executed from the multiple single-device test tasks contained in the full-station test job, and issuing the task to the idle relay protection tester; automatically performing a closed-loop automatic test sequence on the relay protection and measurement and control device to be tested by the relay protection tester receiving the single-device test task.

[0016] Please refer to Figure 2, relay protection and measurement and control device intelligent automatic test and control system, the system comprises: At least two relay protection testers, each relay protection tester is configured to be connected with a to-be-tested relay protection and measurement and control device, and is configured to automatically execute a closed-loop automatic test sequence on the device; A central synchronous automatic test platform connected with the at least two relay protection testers through a communication network; Wherein, the synchronous automatic test platform is configured to execute an intelligent task scheduling process to realize cooperative control of the at least two relay protection testers, and the task scheduling process comprises: continuously monitoring the real-time working state of the at least two relay protection testers; in a whole-station test job comprising a plurality of independent single-device test tasks, when detecting that any one relay protection tester becomes an idle state, automatically selecting a to-be-executed single-device test task from the whole-station test job, and issuing the task to the idle relay protection tester.

[0017] The implementation of the method disclosed in the application covers the complete engineering life cycle from scheme design and management before testing, to multi-machine cooperative execution in testing, to report generation and data archiving after testing. The complete process starts from a powerful automatic test design platform for offline creation and management of test schemes, and finally realizes through a multi-task scheduling capable multi-machine synchronous automatic test running platform.

[0018] First stage: standardized design of test scheme and database construction: To realize high automation and test scheme reusability, the application first constructs an automatic test design platform. The platform is an offline software system used by relay protection professional engineers, and the core goal is to deconstruct the electrical characteristics, protection logic and test procedures of the protected object into a series of standardized, machine-executable instruction sequences, and form a structured test scheme database. In a preferred embodiment, the platform comprises a test scheme design system and a test report design system.

[0019] The execution flow of the test scheme design system starts with the import of a specific protection device model. Specifically, a relay protection engineer, in order to create a new test scheme, will first import a file that comprehensively describes the information of the protection device to be tested through the graphical user interface of the system. The file is preferably a substation configuration description file in accordance with the relevant standards of the International Electrotechnical Commission. The analysis module inside the system will automatically and structurally analyze the file and extract all the information related to the specific intelligent electronic device and store it in a temporary data object in the memory. The information at least includes: a description list of all the setting items of the protection device, including the name, data type, value range and unit of each setting; a description list of all the telemetering quantities; a description list of all the actions and alarm signals, especially the publishing parameters thereof in the communication network; and a description list of all the software pads and control words.

[0020] After the model import is completed, the engineer can design a complete protection logic verification scheme in a "drag and drop and configuration" manner in the graphical environment provided by the design system. The design system is pre-installed with a series of test process components. These components are the result of the abstraction and encapsulation of the relay protection test procedures by the present application, such as the "precision check" component, the "control word on-off" component, the "software pad on-off" component, the "protection test increment" component, the "opening position control" component, the "action result discrimination" component, the "opening position discrimination" component and the "action time discrimination" component. The engineer constructs a complex test flow by dragging these components onto the flow canvas and logically connecting them (such as sequence, branching, looping). When configuring each "protection test increment" component, the engineer can directly select and associate one or more setting items from the imported setting item description list, so that the analog output in the test process can be dynamically associated with the actual setting of the protection device. For example, when configuring the first section of the distance protection test item, the output values of the fault voltage and current can be configured as a certain percentage of the "distance protection first section setting impedance" parameter of the protection device.

[0021] When a complete test scheme design is completed, the engineer needs to attach a series of metadata tags to it, such as the voltage level, protection type, protection manufacturer and specific protection model of the protection device to which the scheme is applicable. Subsequently, the system will serialize the test scheme containing the complete test flow, parameter configuration and setting association relationship into an independent, structured data file and store it in a local test scheme database. Through long-term accumulation, the database will form a highly standardized relay protection automation test scheme knowledge base covering mainstream protection equipment manufacturers and supporting multiple protection types, providing a reusable basis for subsequent automation testing.

[0022] Meanwhile, the test report design system is responsible for the automatic presentation of test results. Its workflow is as follows: the engineer first imports a pre-designed Microsoft Word format report template file that meets the requirements of a specific work instruction or archiving. Then, the designed test plan is also imported into the system. Through a visual interface, the engineer can map each single test result (for example, "distance protection first segment action time") in the test plan to a specific bookmark or placeholder in the Word report template. The system saves these mapping relationships as a separate report template configuration file.

[0023] Second stage: closed-loop execution of single-machine automatic testing After completing the design of the test plan, the next stage of the present application is to implement automatic testing of a single protection device through a single relay protection tester on site. This stage is executed by an automatic measurement and control operation platform deployed on the tester or its control industrial computer. The platform is the basis and minimum execution unit for subsequent multi-machine synchronous testing. In a preferred embodiment, the platform is divided into a human-computer interaction interface module at the view layer, an automatic control module at the control layer, and multiple hardware and device interaction modules at the execution layer in terms of software architecture.

[0024] The complete single-machine automatic testing closed-loop execution process is as follows: a field test personnel first connects a relay protection tester to a protection device to be tested through physical cables (for example, optical Ethernet cables and hard-point opening / closing terminals). Then, the human-computer interaction interface module is started on the tester control industrial computer. The test personnel first inputs or selects the model, manufacturer, and other information of the protection device to be tested on the interface to retrieve the matching test plan from the local test plan database. The interface displays all test items in the plan in list form, and the test personnel can check all or part of the items to be executed this time.

[0025] When the tester clicks the "Start Test" button, the automation control module takes over the whole process. It first loads and instantiates the selected test item sequence. As the first key step of the test process, the automation control module instructs its underlying protection device communication module to perform a complete backup of the pre-test state. The protection device communication module establishes a communication connection with the protection device under test through a client that complies with the communication protocol of the protection device (for example, a client based on the Manufacturing Message Specification). Then, it sends a series of read instructions to completely read and save all protection settings, system parameters, the on-off state of all soft panels, and the state of all control words of the protection device in a temporary backup file. This step is a prerequisite for ensuring that the device can be restored to the original state after the test is completed and for ensuring the safety of the power grid.

[0026] After completing the state backup, the automation control module starts to execute the test items one by one in the order defined in the test plan. For each test item, it first parses the preconditions required by the test item. If it is necessary to turn on or off a specific soft panel or control word, it instructs the protection device communication module to send the corresponding write instruction to the protection device to place it in the correct test state. Subsequently, it parses the core step-up process of the test item and instructs the test instrument control module to accurately control the internal hardware of the relay protection test instrument to apply one or more voltage or current waveforms defined in the test plan and conforming to a specific fault scenario to the protection device through its analog output channel.

[0027] While the test instrument control module is performing the step-up, the automation control module instructs the protection device communication module to enter the result monitoring state. The protection device communication module listens to the action and alarm message information (for example, by subscribing to a trip message in the process-oriented general event model) sent from the protection device in real time or monitors the state change of its hard-wired input terminal through the test instrument control module. Once the expected action signal is listened to, the automation control module immediately records the time difference between the start of the step-up and the receipt of the action signal as the action time. At the same time, it also checks whether the received message information or the input position is completely consistent with the expected result defined in the test plan. If no action is listened to within a preset timeout or the listened result does not match the expectation, the automation control module immediately determines that the test item has failed, sends an audible and visual alarm through the human-computer interaction interface module, can push the alarm information to the mobile terminal of the on-site personnel through the handheld device communication module, and immediately suspends the whole test process to wait for manual intervention.

[0028] After all the checked test items are executed, the automatic control module performs the recovery and verification process of the post-test state. It instructs the communication module of the protection device to completely rewrite all the fixed values, soft panels and control word states in the previous backup file to the protection device. After the rewriting is completed, it performs a complete reading operation again and compares the current state read with the original state in the backup file one by one to ensure that the protection device has been restored to the safe state before the test starts. Finally, the automatic control module calls the report generation module. The report generation module loads all the test result data recorded during the test process and calls the report template configuration file associated with the test scheme. Then, it accurately fills each test result into the corresponding mapping position in the Word report template, finally automatically generates a complete, formatted, and electronic test report containing all the test processes and results, and supports export to Word or PDF format.

[0029] Third stage: system-level implementation of multi-camera synchronous automatic testing This stage upgrades the "single-machine automation" capability described above to a "full-station, multi-task, parallelized" system-level collaborative testing capability.

[0030] To realize multi-camera synchronous testing, the invention physically deploys multiple relay protection testers through an industrial Ethernet switch with a portable industrial computer or a notebook computer as a central server. Each tester is still physically connected to one protection device to be tested. The central server is deployed with a synchronous automatic testing platform.

[0031] The synchronous automatic testing platform is preferably designed using front-end and back-end separation Web technology in software architecture. The back end, i.e., data entities and logic modules, are developed using mainstream technologies such as JavaSpringBoot, responsible for encapsulating all business logic and data entities related to test tasks, and providing data services for the front end through standard RESTfulAPI interfaces. The front end, i.e., the WEB page module, is developed using HTML5 technology, so that any authorized user can access the platform through a browser to configure, monitor and view reports. The back end of the platform also includes a tester communication interface module responsible for maintaining heartbeats, issuing instructions and returning data to all testers in the network. Meanwhile, the platform has a built-in local database for persistently storing the station's protection device account, tester account, test task account and all historical test reports.

[0032] On each relay protection tester participating in the cooperative test, in addition to the aforementioned single-machine automatic test and control platform software, a synchronization communication module is additionally deployed. The module exists in the form of a background service or a dynamic library, is specially responsible for communicating with the tester communication interface module of the synchronization automatic test platform, receives control instructions from the platform, and reports the real-time state and test progress of the tester to the platform.

[0033] The complete workflow of the entire multi-machine synchronization automatic test begins with a person in charge (for example, a team leader or a project engineer) logging in to the synchronization automatic test platform through a browser. The person in charge first defines a "whole station test" task on the platform. Then, through a visual interface, all protection devices that need to be tested this time are selected from the protection device account. At the same time, all available testers that are currently connected are selected from the tester account.

[0034] Next, the person in charge enters the task allocation and scheduling interface. In this interface, the person in charge can assign different test tasks (i.e., test a specific protection device) to different testers. Further, in a preferred embodiment, the task scheduling module built in the platform has intelligent automatic scheduling capability. The internal task scheduling algorithm atomic process is as follows: Task queue generation: when the person in charge submits a "whole station test" job containing multiple test tasks, the task scheduling module first stores these independent test tasks in a to-be-executed task queue, each task is marked as "waiting for scheduling", and different priorities can be assigned according to preset rules.

[0035] Continuous monitoring of resource pool state: the task scheduling module sends a "state query" heartbeat packet to each tester in the network at a fixed time interval (for example, once every second) through the tester communication interface module. After receiving the query, the synchronization communication module of each tester will immediately report its current state, such as "idle", "executing task [task ID]", "execution completed", "fault", etc.

[0036] Intelligent scheduling based on event triggering: when the state of any tester changes to "idle", this event will trigger the task scheduling module to perform a scheduling operation.

[0037] Scheduling operation logic: The scheduling algorithm first selects a task to be scheduled from the task queue according to the priority and waiting time. Then, it checks whether the test scheme type required by the task matches the hardware capability of the current "idle" test instrument. If it matches, the task scheduling module immediately performs a series of atomic operations: first, update the state of the task to "being scheduled" and bind it with the unique identifier of the test instrument; then, update the state of the test instrument to "allocated task"; then, retrieve the complete set of test scheme files, the 61850 configuration file of the protection device, and the latest protection setting file from the local test scheme database and the protection device account; finally, package these files into a task execution data packet and issue it to the target test instrument through the test instrument communication interface module.

[0038] Task execution and monitoring: After receiving the task execution data packet, the synchronization communication module of the target test instrument immediately transfers it to its local automation execution module. The automation execution module then starts executing the aforementioned "single-machine automation test closed-loop process". During the execution process, it periodically returns key progress information (such as "executing the Xth test" and "test item Y failed") and real-time measurement data to the central synchronization automation test platform through its synchronization communication module. The front-end interface of the platform then dynamically displays the current state, test progress, and key results of all test instruments in a centralized and visual manner (for example, a full-station device topology map with different colors and icons representing the test state of each device) to the overall responsible person.

[0039] In a particularly important interlocking test scenario, for example, when testing the failure protection function of the bus protection, it is necessary to simulate a bus fault and simultaneously simulate the breaker failure of a line connected to the bus. At this time, the ability of the task scheduling module is particularly critical. The overall responsible person can define an "interlocking test task" on the platform, which contains two sub-tasks: sub-task A instructs test instrument one connected to the bus protection device to simulate a bus area fault; sub-task B instructs test instrument two connected to the line protection device to maintain the open input contact state without simulating the breaker trip upon receiving the synchronization trigger signal from the platform. The task scheduling module ensures that the two sub-tasks are allocated to different test instruments and includes an accurate synchronization timestamp or trigger event identifier when issuing instructions. Upon receiving the instructions, the two test instruments wait for the arrival of the synchronization signal and then execute their respective actions simultaneously, thereby accurately reproducing the complex power grid failure scenario. The central platform then uniformly collects and analyzes the action messages from the bus protection and line protection to determine whether the entire failure protection logic is correct.

[0040] Through the multi-position synchronous system design described above, the originally isolated and manually coordinated multiple test points are integrated under a unified and intelligent command and dispatch platform, realizing a fundamental technological leap from "single-point automation" to "full-station systematized and parallelized automatic testing", thereby being able to improve the overall test efficiency of the relay protection and the measuring and control device by orders of magnitude, and greatly ensuring the standardization of the test process and the accuracy of the results.

[0041] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for intelligent automatic testing and control of relay protection and measurement and control devices, characterized in that, The method comprises the following steps: establishing a communication connection between a central synchronous automation test platform and at least two relay protection testers, wherein the at least two relay protection testers are connected with at least two relay protection devices to be tested respectively; defining a whole-station test job comprising a plurality of independent single-device test tasks on the synchronous automation test platform; performing an intelligent task scheduling process by the synchronous automation test platform, wherein the task scheduling process comprises continuously monitoring real-time working states of the at least two relay protection testers, and when detecting that any one of the relay protection testers is in an idle state, automatically selecting a single-device test task to be executed from the plurality of single-device test tasks in the whole-station test job, and issuing the task to the idle relay protection tester; automatically performing a closed-loop automation test sequence on the relay protection device to be tested by the relay protection tester receiving the single-device test task.

2. The method of claim 1, wherein the method further comprises: The step of issuing the task to the idle relay protection tester specifically comprises: the synchronous automation test platform retrieves a test scheme file, a protection device configuration file and a protection setting sheet file matched with the single-device test task to be executed from a test scheme database; the test scheme file, the protection device configuration file and the protection setting sheet file are packaged into a task execution data packet, and the task execution data packet is issued to the idle relay protection tester through the communication connection.

3. The method of claim 1, wherein the method further comprises: The method further comprises an offline design step of a test scheme, which is performed before the intelligent task scheduling process, and the offline design step of the test scheme specifically comprises: importing a protection device model file capable of comprehensively describing information of the relay protection device to be tested through an automation test design platform; the automation test design platform performs structural analysis on the protection device model file to extract a setting item description list, a telemetering description list, an action signal description list, a soft platen and a control word description list of the device; in a graphical design environment, a complete and standardized test scheme is constructed by logically combining a series of pre-set test process components and associating with the information extracted from the protection device model file.

4. The method of claim 1, wherein the method further comprises: The closed-loop automation test sequence specifically comprises: the relay protection tester reads and backs up all protection settings, soft platen states and control word states of the relay protection device to be tested completely through communication with the relay protection device to be tested before performing the test; the relay protection tester automatically controls an analog output channel in the relay protection tester to apply one or more preset fault voltage or current waveforms to the relay protection device to be tested according to an instruction of the single-device test task. The relay protection tester listens to the action message information or the hard contact opening signal returned from the relay protection and measurement and control device under test in real time while the fault voltage or current waveform is applied, and automatically distinguishes the received result from the expected result; After the test is completed, the relay protection tester completely writes back the previously backed up all protection setting values, the soft pressure plate state and the control word state to the relay protection and measurement and control device under test.

5. The intelligent automated testing and control method for relay protection and measurement and control devices as described in claim 1, characterized in that, The method further comprises a linkage test step, which specifically comprises: Defining a linkage test task comprising at least two interrelated sub-tasks on the synchronous automation test platform; The synchronous automation test platform sends the at least two sub-tasks to at least two different relay protection testers respectively, and includes a synchronous trigger signal in the sent instruction; The at least two relay protection testers simultaneously execute the respective sub-tasks to simulate a power grid fault scene requiring multiple devices to respond cooperatively after receiving the synchronous trigger signal; The synchronous automation test platform centrally collects and analyzes the test results returned from the at least two relay protection testers to determine whether the overall linkage protection logic is correct.

6. The intelligent automatic test and control system for relay protection and measurement and control device, characterized in that, The system is used to execute the relay protection and measurement and control device intelligent automation test and control method of any one of claims 1-5, and the system comprises: At least two relay protection testers, each of which is configured to be connected with a relay protection and measurement and control device under test and to automatically execute a closed-loop automation test sequence on the device; A central synchronous automation test platform connected with the at least two relay protection testers through a communication network; The synchronous automation test platform is configured to execute an intelligent task scheduling process to realize the cooperative control of the at least two relay protection testers, and the task scheduling process comprises continuously monitoring the real-time working state of the at least two relay protection testers; in a full-station test job comprising multiple independent single-device test tasks, when detecting that any one of the relay protection testers is in an idle state, automatically selecting a single-device test task to be executed from the full-station test job and sending the task to the idle relay protection tester.

7. The intelligent automation testing and control system for relay protection and measurement and control device according to claim 6, characterized in that, The synchronous automation test platform specifically comprises: A database for storing the station account of the protection device, the station account of the tester, the test scheme knowledge base and the test task account; A tester communication interface module for heartbeat maintenance, instruction sending and data return with the at least two relay protection testers; A data entity and logic module for encapsulating all test task related business logic and providing data services for the front end through an application program interface; A task scheduling module for executing the intelligent task scheduling process; A web page module for presenting the current state, test progress and key results of all testers to the user.

8. The intelligent automatic test and control system for relay protection and measurement and control device according to claim 6, characterized in that, Each of the at least two relay protection testers has arranged therein: a synchronous communication module, configured to communicate with the synchronous automation test platform, receive control instructions from the platform, and report real-time status and test progress of the tester to the platform; an automation execution module, configured to load and execute the closed-loop automation test sequence after receiving a task issued by the platform.

9. The intelligent automation testing and control system for protective relaying and supervisory control devices of claim 6, wherein, The system further comprises: an offline automation test design platform, configured to create a standardized and reusable test scheme and build a test scheme knowledge base by importing and analyzing a protection device model file before test execution, so that the synchronous automation test platform can call the test scheme knowledge base when scheduling tasks.

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