Relay protection active regular checking method, system, equipment and medium

Abstract

The invention discloses a relay protection active regular checking method, system and device and a medium, through designing a regular checking period, when the regular checking period arrives, uninterrupted power transmission checking is actively carried out on relay protection, and transmission information is automatically recorded to form a checking report. According to the regular checking method, the regular checking efficiency is improved, and the requirement for automatic and active uninterrupted regular checking of the relay protection device and the secondary circuit is met. Therefore, the problems that in the prior art, power-off-free transmission operation needs to be manually carried out on the relay protection device, a regular checking report cannot be automatically formed, and the regular checking efficiency is low are solved.

Description

Technical Field

[0001] This invention relates to the field of relay protection technology, and in particular to a method, system, equipment and medium for active scheduled maintenance of relay protection. Background Technology

[0002] With the continuous development of power systems, the emergence of large power grids, and the continuous development of new power supply technologies and equipment, relay protection has become an important means to ensure the safe operation of power systems. To ensure the reliable operation of relay protection devices and their secondary circuits, inspection regulations stipulate that the scheduled inspection of relay protection includes partial inspection and full inspection. The first partial inspection should be completed in the fourth year after commissioning, and the full inspection in the seventh year. Thereafter, partial and full inspections should be conducted alternately every three years. All operation and maintenance items must be carried out strictly according to the inspection steps set in the inspection operation instructions. Only when the inspection results meet the inspection standards can the inspected functions be preliminarily considered normal; otherwise, defects in various parts of the relay protection and its secondary circuits can be discovered.

[0003] Currently, the maintenance of relay protection equipment both domestically and internationally requires the use of a menu on the relay protection equipment panel for short-time transmission function to perform short-time transmission testing of the relay protection circuit. This requires manual operation on the relay protection device without power interruption and cannot automatically generate a scheduled inspection report. Summary of the Invention

[0004] This invention provides a method, system, equipment, and medium for active scheduled maintenance of relay protection, which solves the problem that existing technologies require manual operation of relay protection devices without power interruption and cannot automatically generate scheduled maintenance reports, resulting in low scheduled maintenance efficiency.

[0005] In view of this, the first aspect of this application provides a method for active scheduled maintenance of relay protection, the method comprising:

[0006] S1. Obtain the operating information of the relay protection device under test, perform online monitoring and inspection based on the operating information, and obtain the key status information of the relay protection device under test and the secondary circuit. When the key status information is normal, execute step S2.

[0007] S2. Determine whether the relay protection device under test has operated within the preset inspection cycle. If not, perform uninterrupted power transmission inspection and record the transmission process information. If yes, proceed to step S3. The preset inspection cycle includes: a partial inspection cycle and a complete inspection cycle.

[0008] S3. Update the partial inspection cycle with the time when the action occurs as the start time of the partial inspection cycle, and return to step S2 until all inspection cycles have been run, then execute step S4.

[0009] S4. Perform uninterrupted power transmission scheduled inspection on the relay protection device under inspection and record the transmission process information, and generate a scheduled inspection report based on the transmission process information.

[0010] Optionally, the step of performing online monitoring and testing based on the operational information to obtain key status information of the relay protection device under test and its secondary circuit includes:

[0011] Based on the aforementioned operational information, online monitoring and verification of operational status, online monitoring and verification of steady-state sampling, online monitoring and verification of transient data, and online monitoring and verification of setting value, pressure plate and reclosing charging status are performed to obtain online monitoring and analysis data.

[0012] Based on the online monitoring and analysis data, the key status information of the relay protection device under test and its secondary circuit is obtained.

[0013] Optionally, it also includes: when the key status information is abnormal, determining a maintenance decision based on the abnormal key status information and sending it to the operation and maintenance personnel, so that the operation and maintenance personnel can perform power outage or online maintenance based on the key status information; when power outage maintenance is performed and the circuit breaker is activated, the preset scheduled maintenance cycle is updated.

[0014] Optionally, it also includes: when the relay protection device under test does not operate within the preset inspection cycle, an alarm signal is sent to the operation and maintenance personnel at a preset time before the partial inspection cycle and the full inspection cycle arrives, asking whether to perform a non-power-off drive inspection, so that the operation and maintenance personnel respond to the alarm signal and return the command to perform a non-power-off drive inspection or a non-power-off drive inspection.

[0015] Optionally, the step of performing uninterrupted power transmission scheduled maintenance and recording transmission process information includes:

[0016] Before performing the uninterruptible transmission scheduled inspection process, it is determined whether several preset conditions for the uninterruptible transmission scheduled inspection process are met. If so, an uninterruptible transmission remote control command is issued to the relay protection device under inspection to drive the circuit breaker and obtain the tripping and closing information of the circuit breaker. Otherwise, a command is sent that the uninterruptible transmission scheduled inspection process cannot be performed.

[0017] Optionally, some of the preset conditions include: the relay protection device under test is normal, the communication between the intelligent waveform recorder and the relay protection device under test is normal, the protection remote operation pressure plate is engaged, the protection maintenance pressure plate is disengaged, the protection reclosing charging is completed, the protection settings are consistent, the protection pressure plates are consistent, the protection operation status is normal, the protection sampling status is normal, the protection remote non-power transmission soft pressure plate is engaged, the protection non-power transmission is enabled, and the non-power transmission enable remote control is normal.

[0018] Optionally, generating a scheduled inspection report based on the transmission process information includes:

[0019] Based on the tripping and closing information of the circuit breaker, the mechanical characteristics of the tripping circuit, closing circuit, and switch are analyzed, and a scheduled inspection report is generated in combination with the mechanical characteristics. The scheduled inspection report includes: transmission device information, transmission inspection conclusion, pre-transmission status, transmission process record information, and inspection personnel information.

[0020] A second aspect of this application provides a relay protection active scheduled maintenance system, the system comprising:

[0021] The monitoring unit is used to acquire the operating information of the relay protection device under test, perform online monitoring and inspection based on the operating information, obtain the key status information of the relay protection device under test and its secondary circuit, and trigger the judgment unit when the key status information is normal.

[0022] The judgment unit is used to determine whether the relay protection device under test has operated within the preset inspection cycle. If not, it performs uninterrupted power transmission inspection and records the transmission process information. If yes, it triggers the execution unit. The preset inspection cycle includes: a partial inspection cycle and a complete inspection cycle.

[0023] An execution unit is used to update the partial inspection cycle with the time when the action occurs as the start time of the partial inspection cycle, and to trigger the judgment unit until all inspection cycles have been run, at which point the generation unit is triggered.

[0024] The generation unit is used to perform uninterrupted power transmission scheduled inspection on the relay protection device under inspection and record transmission process information, and generate a scheduled inspection report based on the transmission process information.

[0025] A third aspect of the present invention provides a relay protection active scheduled inspection device, the device comprising a processor and a memory:

[0026] The memory is used to store program code and transmit the program code to the processor;

[0027] The processor is configured to execute the steps of the relay protection active scheduled inspection method as described in the first aspect above, according to the instructions in the program code.

[0028] A fourth aspect of the present invention provides a computer-readable storage medium for storing program code for executing the relay protection active scheduled inspection method described in the first aspect above.

[0029] As can be seen from the above technical solutions, the present invention has the following advantages:

[0030] This invention provides an active scheduled inspection method for relay protection. By designing a scheduled inspection cycle, the method actively performs uninterrupted operation inspections on the relay protection when the cycle arrives, and automatically records the operation information to generate an inspection report. This scheduled inspection method improves efficiency and meets the needs of autonomous, active, uninterrupted scheduled inspections of relay protection devices and secondary circuits. It solves the problem of low efficiency caused by existing technologies that require manual uninterrupted operation on the relay protection device and cannot automatically generate inspection reports. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a flowchart illustrating an active scheduled maintenance method for relay protection provided in an embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure of an active scheduled maintenance system for relay protection provided in an embodiment of the present invention. Detailed Implementation

[0034] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] Please see Figure 1 The present invention provides an active scheduled inspection method for relay protection, the method comprising:

[0036] It should be noted that, in specific implementation, the scheduled inspection method of this invention can be executed by an intelligent waveform recorder. Specifically, the intelligent waveform recorder can be designed with an intelligent scheduled inspection module and a remote uninterrupted power transmission module. The intelligent scheduled inspection module is responsible for automatically triggering the scheduled inspection task according to a preset scheduled inspection plan and controlling the relay protection device under inspection to enter the scheduled inspection mode. The remote uninterrupted power transmission module is used to remotely simulate various fault conditions in the power system without power interruption to verify the correctness and sensitivity of the relay protection device's operation. Through the coordinated work of these two modules, active scheduled inspection of the relay protection device is achieved. The intelligent waveform recorder communicates with the relay protection device under inspection via the IEC61850 standard communication protocol.

[0037] It should be noted that the intelligent waveform recorder is a device that can be applied to both intelligent and conventional substations, integrating fault recording, network analyzer, secondary system visualization, and intelligent operation and maintenance functions. It consists of a management unit and a data acquisition unit. The management unit comprises four functional modules: waveform file analysis, network packet analysis and result display, secondary system visualization, and intelligent operation and maintenance. The secondary system visualization module includes functions such as online monitoring of secondary equipment status, online monitoring of secondary virtual loops, online monitoring of secondary process layer fiber optic loops, and secondary loop fault diagnosis and location. The intelligent operation and maintenance module includes functions such as substation configuration file management, secondary maintenance auxiliary safety measures, setting management, fault information management, and comprehensive analysis. The data acquisition unit collects analog quantities, digital quantities, and communication packets, and has waveform file generation, network packet analysis, and communication functions. Furthermore, the IEC 61850 standard is not merely a simple communication protocol, but a standard for intelligent substation automation systems, guiding various fields of substation automation design, development, engineering, and maintenance. By unifying the modeling of objects in the substation automation system and adopting object-oriented technology and abstract communication service interfaces independent of network structure, the interoperability between devices is enhanced, enabling seamless connection between devices from different manufacturers. This greatly improves the level of substation automation technology and safe and stable operation, achieving full interoperability.

[0038] Step 101: Obtain the operating information of the relay protection device under test, perform online monitoring and inspection based on the operating information, and obtain the key status information of the relay protection device under test and its secondary circuit. When the key status information is normal, proceed to step 102.

[0039] It should be noted that the process involves acquiring the operational information of the relay protection device under test, including status information, voltage and current sampling, inputs, circuit breakers, and settings. This information is then analyzed and processed in real time to determine whether the relay protection device and its secondary circuit are functioning normally. This yields key status information for the relay protection device and its secondary circuit. When the key status information is normal, step 102 is executed. The real-time analysis and processing methods can be based on big data analysis and machine learning algorithms to perform in-depth mining and pattern recognition on the collected status information, voltage and current sampling, inputs, circuit breakers, and settings to identify potential faults or abnormal states. Simultaneously, historical data and empirical knowledge are combined to compare and verify the real-time data; this is not limited here.

[0040] In one embodiment, step 101 involves online monitoring and verification based on operational information to obtain key status information of the relay protection device under test and its secondary circuit, including:

[0041] Based on the operational information, online monitoring and testing of operational status, steady-state sampling, transient data, and setting, pressure plate, and reclosing charging status are conducted to obtain online monitoring and analysis data. Based on the online monitoring and analysis data, an evaluation is performed to obtain the key status information of the relay protection device and secondary circuit under test.

[0042] It should be noted that the specific methods for online monitoring and verification of operational status, online monitoring and verification of steady-state sampling, online monitoring and verification of transient data, and online monitoring and verification of setting values, pressure plates, and reclosing charging status are as follows:

[0043] Online monitoring and inspection of operational status: Continuously inspect the relay protection device under test for any abnormalities. By monitoring real-time operational data such as operating voltage, optical power, and operating temperature of the relay protection device under test, and integrating and comparing it with historical data, and combining data such as operating trend curves and performance parameters of key components provided by the manufacturer, the system diagnoses whether there are fault trends in the relay protection device hardware, so as to replace fault trend plugs in a timely manner and reduce equipment hardware failure.

[0044] Steady-state sampling online monitoring and verification: The steady-state sampling values ​​of the relay protection device under test are compared with the steady-state data from other devices. This can compare the consistency of analog quantity information (such as voltage and current) and switch quantity information (switch position) collected in the same interval from different devices (such as line protection, line measurement and control devices, bus differential protection, etc.). It can also determine whether the neutral point of the voltage transformer is reliably grounded by calculating the voltage harmonics of the steady-state data, and determine the correctness of the transmission and reception route of the protection channel by calculating the real-time differential current. The correctness of the switch status and analog quantity acquisition can be determined by the switch position status information and current information.

[0045] Transient data online monitoring and verification: Each startup allows real-time checking of the transient sampling values ​​of the relay protection device under test, and each operation verifies the correctness of the transient sampling values ​​and tripping circuits. By analyzing the waveform files generated after system disturbances or faults, the integrity of the analog sampling circuits for secondary current and voltage, as well as the input / output tripping circuits of the relay protection device under test, is verified, as are the correctness of the operating characteristics of the primary switchgear. Simultaneously, waveform data from the same disturbance process can be compared to determine whether the changes are caused by external disturbances or internal anomalies. For example: ① During a system short circuit, by comprehensively judging electrical quantity data, current transformer saturation and voltage transformer secondary circuit anomalies can be identified; ② By decomposing the operating behavior of the relay protection device under test, anomalies in the protection analog quantity acquisition circuit, protection tripping / closing output circuit, pressure plate, and input I / O circuits can be identified.

[0046] Online monitoring and verification of setting, pressure plate and reclosing charging status: It can automatically identify the protection setting operation area and compare it with the standard setting; check in real time whether the current pressure plate status is consistent with the activation / deactivation table; and check in real time whether the reclosing is fully charged.

[0047] Based on the above online monitoring and analysis data, the status of key indicators of the relay protection device under test and its secondary circuit are assessed. The system automatically diagnoses possible causes of abnormalities in the relay protection device under test and prompts maintenance personnel to address the defects. For example, if zero-sequence voltage persists for a long time and is dominated by the third harmonic, it is recommended that protection personnel check the voltage neutral point.

[0048] Step 102: Determine whether the relay protection device under test has operated within the preset inspection cycle. If not, perform uninterrupted power transmission inspection and record the transmission process information. If yes, proceed to step 103. The preset inspection cycle includes: partial inspection cycle and full inspection cycle.

[0049] It should be noted that the preset inspection cycle can be set in advance on the intelligent waveform recorder. Some inspection cycles can be set to three years, and all inspection cycles can be designed to be six years.

[0050] Step 103: Update the partial inspection cycle with the time when the action occurs as the start time of the partial inspection cycle, and return to step 102 until all inspection cycles have been run, then execute step 104.

[0051] Step 104: Perform uninterrupted power transmission scheduled inspection on the relay protection device under inspection and record the transmission process information, and generate a scheduled inspection report based on the transmission process information.

[0052] For steps 102-104, it is understood that if no action (three-phase tripping) occurs within a certain inspection cycle (default three years), a non-power-off transmission scheduled inspection is automatically performed. If a three-phase trip occurs within a certain inspection cycle (default three years), the inspection cycle is automatically recalculated from the time of the three-phase trip. If no three-phase trip occurs within the recalculated inspection cycle (default three years), a non-power-off transmission scheduled inspection is automatically performed. If a three-phase trip occurs within the recalculated inspection cycle (default three years), the cycle is recalculated again from the time of the three-phase trip, and so on. If the entire inspection cycle (default six years) is reached, a non-power-off transmission scheduled inspection should be automatically performed regardless of whether a three-phase trip has occurred within the entire inspection cycle. Then, the non-power-off transmission scheduled inspection process is performed on the relay protection device under inspection, the transmission process information is recorded, and a scheduled inspection report is generated based on the transmission process information.

[0053] In one embodiment, the relay protection active scheduled inspection method of the present invention further includes:

[0054] When critical status information is abnormal, maintenance decisions are determined based on the abnormal critical status information and sent to maintenance personnel, enabling them to perform power outages or online maintenance based on the critical status information. When power outage maintenance is performed and the circuit breaker is activated, the preset scheduled maintenance cycle is updated.

[0055] It should be noted that, firstly, when critical status information is abnormal, maintenance decisions are determined based on the abnormal critical status information. The method for determining maintenance decisions can be based on machine learning algorithms to analyze historical maintenance data, identify historical cases similar to the current abnormal critical status information, and intelligently recommend corresponding maintenance decisions based on the maintenance strategies and results of historical cases. Next, maintenance is carried out manually via power outage or online. If power outage maintenance triggers the circuit breaker, the inspection cycle is updated. If the relay protection operates due to a grid fault within the scheduled maintenance cycle, the fault waveform file will be automatically recorded and analyzed. The analog, input, and output data will be compared to the actual situation to verify the relay protection sampling, input, and output circuits. Simultaneously, part of the inspection cycle will be automatically recalculated and extended from the grid fault trip time.

[0056] In one embodiment, the relay protection active scheduled inspection method of the present invention further includes:

[0057] If the relay protection device under inspection does not operate within the preset inspection cycle, an alarm signal will be sent to the operation and maintenance personnel at a preset time before the partial inspection cycle and the full inspection cycle, asking whether to perform a non-power-off drive inspection. This will prompt the operation and maintenance personnel to respond to the alarm signal and return to the command to perform a non-power-off drive inspection.

[0058] It should be noted that if the relay protection device under inspection does not operate within the preset inspection cycle, an alarm will be sent to the maintenance personnel one month before the partial or full inspection cycle is reached to determine whether to perform a non-power-off transmission inspection. If the maintenance personnel believe that a non-power-off transmission inspection is necessary, the non-power-off transmission inspection alarm will be reset, and the non-power-off transmission inspection will be automatically switched to a non-power-off inspection after entering the non-power-off transmission inspection interlock command. If the non-power-off transmission inspection alarm is reset but the non-power-off transmission inspection interlock command is not entered, the non-power-off transmission inspection will be automatically performed on the inspection cycle date, and the next partial inspection cycle will be automatically calculated and saved.

[0059] In one embodiment, step 102 involves performing a non-powered transmission scheduled inspection and recording transmission process information, including:

[0060] Before performing the uninterruptible power transmission (UPS) scheduled maintenance process, it is determined whether several preset conditions for the UPS scheduled maintenance process are met. If so, a UPS remote control command is sent to the UPS under maintenance device to activate the circuit breaker and obtain the tripping and closing information of the circuit breaker. If not, the UPS scheduled maintenance process cannot be performed. The preset conditions include: the UPS under maintenance device is normal; communication between the intelligent waveform recorder and the UPS under maintenance device is normal; the protection remote operation switch is engaged; the protection maintenance switch is disengaged; the protection reclosing charging is completed; the protection settings are consistent; the protection switches are consistent; the protection operation status is normal; the protection sampling status is normal; the protection remote UPS soft switch is engaged; the protection UPS is enabled; and the UPS remote control is normal.

[0061] It should be noted that the intelligent waveform recorder utilizes remote uninterruptible power transmission technology for relay protection outgoing transmission. Before transmission, it automatically performs uninterruptible power transmission condition pre-judgment. Preset conditions include: the relay protection device under test is normal; communication between the intelligent waveform recorder and the relay protection device under test is normal; the protection remote operation pressure plate is engaged; the protection maintenance pressure plate is disengaged; the protection reclosing charging is completed; the protection settings are consistent; the protection pressure plates are consistent; the protection operation status is normal; the protection sampling status is normal; the protection remote uninterruptible power transmission soft pressure plate is engaged; the protection uninterruptible power transmission is enabled; and the uninterruptible power transmission remote control is normal. When all the above preset conditions are met, an uninterruptible power transmission remote control command is issued to the relay protection device under test to transmit the power to the circuit breaker. It automatically monitors the circuit breaker's tripping and closing, and diagnostic records, and automatically generates an uninterruptible power transmission scheduled inspection report, while automatically completing the extended inspection cycle. This achieves the inspection of sampling, input, and output circuits. To avoid long-term power outages, automatic fast reclosing is used after transmission to reduce load loss. If any preset condition is not met, the non-stop power transmission will be locked. If the relay protection device under test fails to receive the remote control command for non-stop power transmission, the non-stop power transmission will be locked and an alarm indicating that non-stop power transmission cannot be performed will be sent.

[0062] In one embodiment, step 104 involves generating a scheduled inspection report based on the transmission process information, including:

[0063] Based on the tripping and closing information of the circuit breaker, the mechanical characteristics of the tripping circuit, closing circuit and switch are analyzed, and a scheduled inspection report is generated in combination with the mechanical characteristics. The scheduled inspection report includes: transmission device information, transmission inspection conclusion, pre-transmission status, transmission process record information and inspection personnel information.

[0064] It should be noted that the automatic diagnostic system records the information of the entire transmission process, calculates whether the tripping and closing circuits and the mechanical characteristics of the switch meet the specifications, and generates a standardized WORD or PDF inspection report. The report includes information on the transmission device, transmission inspection conclusions, pre-transmission status, transmission process record information, and inspection personnel information.

[0065] This invention provides an active scheduled inspection method for relay protection. It utilizes an intelligent waveform recorder to perform status checks on the relay protection device under inspection. Specifically, by designing a scheduled inspection cycle, the method actively performs a non-power-off transmission inspection of the relay protection device when the cycle arrives, and automatically records the transmission information to generate an inspection report. This scheduled inspection method improves inspection efficiency and meets the needs of autonomous, active, non-power-off scheduled inspections of relay protection devices and secondary circuits. It solves the problem of low inspection efficiency caused by the prior art requiring manual non-power-off transmission operations on the relay protection device and the inability to automatically generate inspection reports.

[0066] The above is a relay protection active scheduled inspection method provided in the embodiments of the present invention. The following is a relay protection active scheduled inspection system provided in the embodiments of the present invention.

[0067] Please see Figure 2 An active scheduled maintenance system for relay protection provided in this embodiment of the invention includes:

[0068] Monitoring unit 201 is used to acquire the operating information of the relay protection device under test, perform online monitoring and inspection based on the operating information, obtain the key status information of the relay protection device under test and its secondary circuit, and trigger judgment unit 202 when the key status information is normal.

[0069] The judgment unit 202 is used to determine whether the relay protection device under test has operated within the preset inspection cycle. If not, it performs uninterrupted power transmission inspection and records the transmission process information. If it is, it triggers the execution unit 203. The preset inspection cycle includes: a partial inspection cycle and a complete inspection cycle.

[0070] The execution unit 203 is used to update the partial inspection cycle with the time when the action occurs as the start time of the partial inspection cycle, and trigger the judgment unit 202 until all inspection cycles are run, then trigger the generation unit 204.

[0071] The generation unit 204 is used to perform uninterrupted power transmission scheduled maintenance on the relay protection device under inspection, record transmission process information, and generate a scheduled maintenance report based on the transmission process information.

[0072] This invention provides an active scheduled inspection system for relay protection. By designing a scheduled inspection cycle, the system actively performs uninterrupted operation inspections on the relay protection when the cycle arrives, and automatically records the operation information to generate an inspection report. This scheduled inspection system improves inspection efficiency and meets the needs of autonomous, active, uninterrupted scheduled inspections of relay protection devices and secondary circuits. It solves the problem of low efficiency caused by existing technologies that require manual uninterrupted operation on the relay protection device and cannot automatically generate inspection reports.

[0073] Furthermore, this embodiment of the invention also provides a relay protection active scheduled inspection device, the device including a processor and a memory:

[0074] The memory is used to store program code and transmit the program code to the processor;

[0075] The processor is used to execute the steps of the relay protection active scheduled inspection method as described in the above method embodiments, according to the instructions in the program code.

[0076] Furthermore, this embodiment of the invention also provides a computer-readable storage medium for storing program code, which is used to execute the relay protection active scheduled inspection method described in the above method embodiments.

[0077] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0078] In the embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0079] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0080] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0081] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for active scheduled maintenance of relay protection, characterized in that, include: S1. Obtain the operating information of the relay protection device under test, perform online monitoring and inspection based on the operating information, and obtain the key status information of the relay protection device under test and the secondary circuit. When the key status information is normal, execute step S2. S2. Determine whether the relay protection device under test has operated within the preset inspection cycle. If not, perform uninterrupted power transmission inspection and record the transmission process information. If yes, proceed to step S3. The preset inspection cycle includes: a partial inspection cycle and a complete inspection cycle. S3. Update the partial inspection cycle with the time when the action occurs as the start time of the partial inspection cycle, and return to step S2 until all inspection cycles have been run, then execute step S4. S4. Perform uninterrupted power transmission scheduled inspection on the relay protection device under inspection and record the transmission process information, and generate a scheduled inspection report based on the transmission process information.

2. The relay protection active scheduled inspection method according to claim 1, characterized in that, The online monitoring and testing based on the operational information yields key status information of the relay protection device under test and its secondary circuit, including: Based on the aforementioned operational information, online monitoring and verification of operational status, online monitoring and verification of steady-state sampling, online monitoring and verification of transient data, and online monitoring and verification of setting value, pressure plate and reclosing charging status are performed to obtain online monitoring and analysis data. Based on the online monitoring and analysis data, the key status information of the relay protection device under test and its secondary circuit is obtained.

3. The method for active scheduled maintenance of relay protection according to claim 1, characterized in that, Also includes: When the critical status information is abnormal, a maintenance decision is determined based on the critical status information under abnormal conditions and sent to the maintenance personnel, so that the maintenance personnel can carry out power outage or online maintenance based on the critical status information. When power outage maintenance is carried out and the circuit breaker is activated, the preset scheduled maintenance cycle is updated.

4. The method for active scheduled maintenance of relay protection according to claim 1, characterized in that, Also includes: When the relay protection device under test does not operate within the preset inspection cycle, an alarm signal is sent to the operation and maintenance personnel at a preset time before the partial inspection cycle and the full inspection cycle arrives, asking whether to perform a non-power-off transmission inspection. This prompts the operation and maintenance personnel to respond to the alarm signal and return to the command to perform a non-power-off transmission inspection or a non-power-off transmission inspection.

5. The method for active scheduled maintenance of relay protection according to claim 1, characterized in that, The process of performing uninterrupted power transmission scheduled maintenance and recording transmission process information includes: Before performing the uninterruptible transmission scheduled inspection process, it is determined whether several preset conditions for the uninterruptible transmission scheduled inspection process are met. If so, an uninterruptible transmission remote control command is issued to the relay protection device under inspection to drive the circuit breaker and obtain the tripping and closing information of the circuit breaker. Otherwise, a command is sent that the uninterruptible transmission scheduled inspection process cannot be performed.

6. The method for active scheduled maintenance of relay protection according to claim 5, characterized in that, Several of the preset conditions include: the relay protection device under test is normal, the communication between the intelligent waveform recorder and the relay protection device under test is normal, the protection remote operation pressure plate is engaged, the protection maintenance pressure plate is disengaged, the protection reclosing charging is completed, the protection settings are consistent, the protection pressure plates are consistent, the protection operation status is normal, the protection sampling status is normal, the protection remote non-power transmission soft pressure plate is engaged, the protection non-power transmission is enabled, and the non-power transmission enable remote control is normal.

7. The method for active scheduled maintenance of relay protection according to claim 5, characterized in that, The step of generating a scheduled inspection report based on the transmission process information includes: Based on the tripping and closing information of the circuit breaker, the mechanical characteristics of the tripping circuit, closing circuit, and switch are analyzed, and a scheduled inspection report is generated in combination with the mechanical characteristics. The scheduled inspection report includes: transmission device information, transmission inspection conclusion, pre-transmission status, transmission process record information, and inspection personnel information.

8. A relay protection active scheduled inspection system, characterized in that, include: The monitoring unit is used to acquire the operating information of the relay protection device under test, perform online monitoring and inspection based on the operating information, obtain the key status information of the relay protection device under test and its secondary circuit, and trigger the judgment unit when the key status information is normal. The judgment unit is used to determine whether the relay protection device under test has operated within the preset inspection cycle. If not, it performs uninterrupted power transmission inspection and records the transmission process information. If yes, it triggers the execution unit. The preset inspection cycle includes: a partial inspection cycle and a complete inspection cycle. An execution unit is used to update the partial inspection cycle with the time when the action occurs as the start time of the partial inspection cycle, and to trigger the judgment unit until all inspection cycles have been run, at which point the generation unit is triggered. The generation unit is used to perform uninterrupted power transmission scheduled inspection on the relay protection device under inspection and record transmission process information, and generate a scheduled inspection report based on the transmission process information.

9. A relay protection active scheduled maintenance device, characterized in that, The device includes a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the relay protection active inspection method according to any one of claims 1-7 according to the instructions in the program code.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store program code for executing the relay protection active scheduled inspection method according to any one of claims 1-7.

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