Construction method for online upgrading protection device firmware

Abstract

The invention discloses a construction method for online upgrading protection device firmware. The construction method comprises the steps that a protection outlet pressing plate of a power supply loop where a to-be-upgraded protection device is located is withdrawn; performing online firmware upgrading on the protection device; and a protection outlet pressing plate of the power supply loop is recovered. Therefore, on the basis of realizing on-line firmware upgrading without power failure, the power supply continuity is ensured, the influence on user power supply is reduced, and the power supply risk is reduced or avoided.

Description

Technical Field

[0001] This application relates to the field of relay protection device technology, and in particular to a construction method for online upgrading of protection device firmware. Background Technology

[0002] Typically, circuit systems are equipped with protection devices to improve system reliability. For example, microcomputer-based integrated protection devices include protection mechanisms. In principle, the self-test program of these protection devices should be fault-tolerant. However, due to design flaws in the self-test programs of some protection device versions, there are instances where the self-test function of that version of the protection device fails, or the protection functions of some devices are locked, rendering the protection device inoperable. Therefore, it is necessary to upgrade the firmware of that version of the protection device to improve the self-test program of the protection software.

[0003] Currently, there are two solutions for firmware upgrades of protection devices: The first method involves upgrading the firmware of the protection device during a power outage. Generally, to ensure power supply reliability and avoid the risk of circuit breaker tripping and power outages during firmware upgrades, updating the protection device's firmware during a power outage is the safest approach. However, this inevitably affects users' normal power consumption and production, impacting the continuity of power supply.

[0004] The second scenario involves upgrading the firmware of the protection device without interrupting power supply. If the power supply circuit is continuously operating and there are no conditions for power outages, directly upgrading the firmware of the protection device online may also create another power supply risk: when a short circuit occurs in the power supply circuit, the protection device may fail to operate correctly, resulting in protection failure—meaning it should activate but does not. This situation can affect the normal operation of the power supply and distribution system and may even cause the accident to escalate, affecting the power supply to more users.

[0005] Therefore, how to upgrade the firmware of the protection device while ensuring the continuity of power supply and reducing the impact on users has become an urgent technical problem to be solved. Summary of the Invention

[0006] In view of this, in order to solve at least one of the above-mentioned technical problems, this application provides a method for upgrading the firmware of an online protection device.

[0007] To achieve the above objectives, this application mainly provides the following technical solutions: This application provides a method for online upgrading of protection device firmware, including: Remove the protection output pressure plate of the power supply circuit containing the protection device to be upgraded; Perform online firmware upgrades on the protection device; Restore the protection output pressure plate of the power supply circuit.

[0008] For example, the steps for performing an online firmware upgrade on a protection device include: The protection software is used to update the firmware of the self-test program of the protection device. During the upgrade process, ensure that the power supply and control power supply of the protection device to be upgraded are not interrupted.

[0009] For example, prior to the step of removing the protection output pressure plate of the power supply circuit containing the protection device to be upgraded, the method further includes: Perform functional tests on the self-test program in the protection software to ensure that the functional tests meet the requirements.

[0010] For example, the steps for performing functional tests on the self-test program of protection software include: The backup protection device is upgraded offline using protection software. The backup protection device and the protection device to be upgraded are from the same batch and have the same version. The functionality of the upgraded backup protection device was tested.

[0011] For example, prior to the step of performing an online firmware upgrade on the protection device, the method further includes: Read and record the parameter information of the protection device to be upgraded; After performing an online firmware upgrade on the protection device, the method further includes: Read and record the parameter information of the upgraded protection device; Verify the parameter information for the upgrade and the upgraded parameter information, and ensure that the two parameter information are consistent.

[0012] For example, prior to the step of reading and recording the parameter information of the upgraded protection device, the method further includes: Perform a self-test on the upgraded protection device to ensure that the protection device is in normal condition and in operation.

[0013] For example, the parameter information includes at least one of protection settings, logic, and communication.

[0014] For example, prior to the step of performing an online firmware upgrade on the protection device, the method further includes: Read and record the word status information of the protection device to be upgraded; After performing an online firmware upgrade on the protection device, the method further includes: Read and record the word status information of the upgraded protection device; The status information of the character position to be upgraded and the upgraded position should be checked to ensure that the two status information are consistent.

[0015] For example, prior to the step of removing the protection output pressure plate of the power supply circuit containing the protection device to be upgraded, the method further includes: Develop construction plans and emergency response plans; Conduct safety inspections of the construction site conditions; Be familiar with and master the circuit principles and diagrams of the high-voltage switchgear for firmware upgrades.

[0016] For example, the steps for conducting a safety inspection of the construction site include: Confirm the location of the protection devices to be upgraded at the construction site; Record the data information of the protection device to be upgraded; Confirm the operating status of the electrical equipment connected to the power supply circuit; Confirm the power supply range of the power supply circuit.

[0017] The online firmware upgrade method for protection devices provided in this application involves removing the protection output pressure plate of the power supply circuit containing the protection device to be upgraded, performing an online firmware upgrade on the protection device, and then restoring the protection output pressure plate of the power supply circuit after the upgrade is completed. This reduces the risk of power tripping during online firmware upgrades, ensuring that the firmware upgrade of the protection device can be performed online without power interruption and that the circuit breaker of the power supply circuit is not accidentally tripped during the firmware upgrade process, thus ensuring the continuity of power supply. Therefore, while achieving uninterrupted online firmware upgrades, it ensures the continuity of power supply, reduces the impact on user power supply, and reduces or avoids power supply risks. It is highly reliable, adaptable, and suitable for widespread application.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein: Figure 1 This illustration shows one of the schematic flowcharts of the online upgrade protection device firmware construction method provided by the embodiments of this application; Figure 2 This is a second schematic flowchart illustrating the construction method of the online upgrade protection device firmware provided in an embodiment of this application. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] The embodiments of this application, such as Figure 1 As shown, a method for upgrading the firmware of an online protection device is provided, including: Step S110: Unplug the protection output pressure plate of the power supply circuit where the protection device to be upgraded is located.

[0022] Among them, the protection device to be upgraded can be understood as a protection device whose design has problems with the self-test program of the protection software. The firmware of this version of the protection device needs to be upgraded in order to upgrade the self-test program of the protection software.

[0023] Specifically, taking the SEL-351A protection devices used in some of the microcomputer-based integrated protection devices at Shaogang Steel as an example, this batch of SEL-351A protection devices has experienced self-test failures and partial protection function lockouts, rendering the protection devices unable to operate. These SEL-351A protection devices have been in use for approximately six years. Some of the aforementioned phenomena occurred during operation, while others occurred during power outages. Therefore, these SEL-351A protection devices can be understood as requiring an upgrade.

[0024] According to technical personnel, a total of 18 SEL-351A protection devices experienced the aforementioned malfunction. Data analysis revealed that the primary cause of the malfunction was an overly sensitive software setting in the self-test section of the firmware version of the SEL-351A protection device at this stage. Any momentary error detected during the relay self-test would trigger the protection to close. This situation stems from a design flaw in the self-test program of this version of the protection software. Since the RAM chip integrated into the microcomputer protection device always has a probability of internal momentary errors, the momentary errors in this batch of SEL-351A devices from Shaogang were relatively concentrated, causing frequent protection shutdowns. This may result in the following two scenarios: First, the protection device will not trip unnecessarily: when the protection device is locked, it will not activate and trigger the circuit breaker to trip, thus preventing unnecessary tripping. This will not affect the normal operation of the power supply and distribution system.

[0025] Second, protection device malfunction: When a short circuit or single-phase ground fault occurs in the system, the protection device may fail to operate correctly, resulting in malfunction—meaning it fails to operate when it should. This situation can affect the normal operation of the power supply and distribution system and may even cause the accident to escalate, affecting the power supply to more users.

[0026] To address this issue, the SEL protection device R&D department studied the above situation and improved the self-test program settings of the protection software for the SEL-351A protection device. They filtered out memory chip errors, preventing the protection from being blocked for some unimportant, transient errors, thus improving the fault tolerance of the self-test program. Therefore, the next task is to upgrade the firmware of this batch of SEL-351A protection devices to upgrade the self-test program of the protection software.

[0027] In this context, the disengagement of the protection output switch in the power supply circuit means that the tripping function of the protection device is temporarily disabled, but the protection function itself may still operate normally. Specifically, after the protection output switch in the power supply circuit is disengaged, the tripping function is as follows: Although the protection device can detect the fault, it cannot disconnect the circuit breaker through the tripping circuit. The protection functions (such as overcurrent protection and distance protection) may still operate normally, but cannot trigger a trip.

[0028] Specifically, you can check the secondary schematic diagram of the circuit to identify and disable the protection trip output circuit breaker of the power supply circuit. For circuits with remote control opening and closing functions, you need to switch the remote control transfer switch to the home position to isolate all protection outputs from the trip circuit.

[0029] Step S120: Perform an online firmware upgrade on the protection device.

[0030] As mentioned earlier, the problem with the protection device to be upgraded is that the self-test program of the protection software has a design flaw. Therefore, online firmware upgrade of the protection device refers to online firmware upgrade of the self-test program of the protection software.

[0031] The specific steps for online firmware upgrades of the protection device include: The protection software is used to update the firmware of the self-test program of the protection device. During the upgrade process, ensure that the power supply and control power supply of the protection device to be upgraded are not interrupted.

[0032] In this embodiment, technicians use protection software such as SEL software to update the firmware of the protection device's self-test program, enabling online upgrades of the protection device's self-test program. Furthermore, during the upgrade process, it is ensured that the power supply and control power supply of the protection device to be upgraded are uninterrupted, and monitoring personnel closely monitor the status of the high-voltage cabinet, secondary signals, meters, etc., to ensure that the power supply is not interrupted.

[0033] It is understandable that if the power is interrupted, the firmware upgrade of the protection device can be considered a failure, and the firmware upgrade operation needs to be performed again using the online firmware upgrade method provided in this application.

[0034] Step S130: Restore the protection output pressure plate of the power supply circuit.

[0035] Among them, the protection output pressure plate for restoring the power supply circuit can ensure the normal operation of the power system protection function, prevent malfunctions or failures to operate, and protect the safety of equipment and power grid.

[0036] Upgrading the firmware of the protection device during a power outage does not pose a power supply risk, but it will affect users' normal power consumption and production, impacting the continuity of power supply. Upgrading firmware online without power interruption carries the risk of power outage, but this only affects the power supply to its own circuit and does not affect other users' power supply. However, failing to upgrade the firmware of the protection device in a timely manner also poses a power supply risk. If a short circuit fault occurs in its own power supply circuit, and the protection device fails to operate due to the lack of a timely firmware upgrade, it will not only affect its own circuit but also the power supply to other users, causing the accident to escalate and affecting more users' power supply.

[0037] Therefore, the online firmware upgrade method for protection devices provided in this application reduces the risk of power outage during online firmware upgrades by removing the protection output pressure plate of the power supply circuit containing the protection device to be upgraded, performing the online firmware upgrade, and then restoring the protection output pressure plate of the power supply circuit after the upgrade is completed. This ensures that the firmware upgrade can be performed online without power interruption and that the circuit breaker of the power supply circuit is not accidentally tripped during the firmware upgrade process, thus ensuring the continuity of power supply. Therefore, while achieving uninterrupted online firmware upgrades, this method ensures the continuity of power supply, reduces the impact on user power supply, and minimizes or avoids power supply risks. It is highly reliable, adaptable, and suitable for widespread application.

[0038] In some possible embodiments provided in this application, before step S110, the construction method for online upgrading of the protection device firmware further includes: performing a functional test on the self-test program in the protection software to ensure that the functional test meets the requirements.

[0039] The self-test program in the protection software can be understood as an improved self-test program. That is, the self-test program is improved compared to the self-test program in the protection device to be upgraded. It filters out memory chip errors and will not lock out protection for some unimportant instantaneous errors, thereby improving the fault tolerance of the self-test program.

[0040] In this embodiment, the self-test program in the protection software is first functionally tested to ensure that the improved self-test program meets the functional requirements. This demonstrates that the improved self-test program in the protection software can solve the problems existing in the self-test program of the protection device to be upgraded. Then, the protection output pressure plate of the power supply circuit where the protection device to be upgraded is located is removed to perform the online firmware upgrade operation of the protection device to be upgraded. This ensures that the self-test program of the upgraded protection device will not exhibit similar frequent blocking phenomena, has high fault tolerance, and avoids the problem that the self-test program in the protection software still has problems, which could lead to frequent blocking phenomena in the upgraded protection device.

[0041] In some possible embodiments provided in this application, the steps of performing functional tests on the self-test program of the protection software include: The backup protection device is upgraded offline using protection software. The backup protection device and the protection device to be upgraded are from the same batch and have the same version. The functionality of the upgraded backup protection device was tested.

[0042] The backup protection device and the protection device to be upgraded are from the same batch and version. This means the backup protection device is connected to the power supply system of the protection device to be upgraded. In other words, the self-test procedures of the backup and upgrade protection devices are identical, both exhibiting the problem of frequent device lockouts. However, the backup protection device is not installed on the integrated protection device and can exist independently. Therefore, performing a firmware upgrade on the backup protection device offline will not affect the continuity of power supply to the power supply circuit of the protection device to be upgraded.

[0043] Since the improved self-test program is embedded in the protection software, the firmware of the backup protection device's self-test program can be upgraded offline using the protection software. By testing the upgraded backup protection device, the functionality of the improved self-test program in the protection software can be determined. This allows for functional testing of the improved self-test program, ensuring that upgrading the protection device with a functionally qualified self-test program will not result in frequent blocking. Furthermore, this operation will not affect the continuity of power supply to the power supply circuit of the protection device to be upgraded.

[0044] Understandably, if problems are found during the testing of the upgraded backup protection device, such as the continued frequent blocking phenomenon, the improved self-test program in the protection software can be further improved and perfected. Then, the steps of functional testing and self-test program improvement can be repeated until the functional test meets the requirements. This indicates that the self-test program in the upgraded software meets the requirements and can solve the problems existing in the protection device to be upgraded and the backup protection device.

[0045] In some possible embodiments provided in this application, before the step of performing an online firmware upgrade on the protection device, the method further includes: reading and recording the parameter information of the protection device to be upgraded; after the step of performing an online firmware upgrade on the protection device, the method further includes: reading and recording the parameter information of the upgraded protection device; verifying the parameter information to be upgraded and the upgraded parameter information, and ensuring that the two parameter information are consistent; wherein, the parameter information includes at least one of protection settings, logic, and communication.

[0046] In this embodiment, by reading and recording the parameter information of the protection device before and after the online firmware upgrade operation, and then verifying the parameter information to be upgraded and the upgraded parameter information, and ensuring that the two parameter information are consistent, the stability, security and compliance of the system function can be guaranteed, and the abnormality or safety hazards caused by parameter deviation can be avoided.

[0047] The parameter information may include at least one of protection settings, logic, and communication parameters. It is understood that the parameter information may also include other parameters.

[0048] In some possible embodiments provided in this application, before the step of reading and recording the parameter information of the upgraded protection device, the method further includes: performing a self-test on the upgraded protection device to ensure that the protection device is in normal condition and in the activated state.

[0049] In this embodiment, the upgraded protection device is self-tested to ensure that the protection device is in normal condition and in the working state before reading and recording the parameter information of the upgraded protection device. This ensures the accuracy of the recorded parameter information of the upgraded protection device, thereby improving the accuracy of the calibration of the parameter information to be upgraded and the upgraded device. This is beneficial to ensuring the stability, security and compliance of the system functions and avoiding equipment abnormalities or safety hazards caused by parameter deviations.

[0050] Specifically, before performing an online firmware upgrade on the protection device, a laptop can be connected to the communication interface of the protection device to be upgraded using a network cable. The parameter information (logic, setting, communication, etc.) within the protection device to be upgraded can be read and backed up for easy comparison of the upgraded parameters.

[0051] Specifically, after performing an online firmware upgrade on the protection device, use the STA command for a self-test to check the recorded firmware version number. The device's self-test status should be normal, indicating it is in operation. Then, reconnect the laptop and the upgraded protection device's communication interface using a network cable. Read the parameter information (logic, settings, communication, etc.) from the upgraded protection device, back it up, and compare it with the previously backed-up parameters before the upgrade to ensure that the parameters to be upgraded and the upgraded parameters are consistent.

[0052] In some possible embodiments provided in this application, before the step of performing an online firmware upgrade on the protection device, the method further includes: reading and recording the word position status information of the protection device to be upgraded; after the step of performing an online firmware upgrade on the protection device, the method further includes: reading and recording the word position status information of the upgraded protection device; verifying the word position status information to be upgraded and the upgraded word position status information, and ensuring that the two word position status information are consistent.

[0053] Among them, the word status information of the protection device usually refers to the binary data bits in its internal registers or storage units used to represent the operating status of the equipment, fault information or control parameters.

[0054] In this embodiment, the word status information of the protection device is read and recorded before and after the online firmware upgrade operation. Then, the word status information to be upgraded and the upgraded word status information are checked and kept consistent. This ensures that the device will not be misoperated or malfunctioned due to incorrect identification during operation, thereby ensuring the safety and reliability of the power system.

[0055] In some possible embodiments provided in this application, before the step of removing the protection output pressure plate of the power supply circuit containing the protection device to be upgraded, the method further includes: Develop construction plans and emergency response plans; Conduct safety inspections of the construction site conditions; Be familiar with and master the circuit principles and diagrams of the high-voltage switchgear for firmware upgrades; Prepare tools and equipment.

[0056] This embodiment provides the preliminary preparations for performing online firmware upgrades on the protection device.

[0057] Among them, formulating a construction plan can guide safe operation during the construction process, and has planning and guidance for various operations, which helps to ensure construction safety. At the same time, it helps to improve construction efficiency, thereby improving the accuracy of various tasks and preventing accidental activation of protective equipment during construction.

[0058] Among these measures, developing emergency response plans provides guidance and planning for emergency operations, playing a role in preventing problems before they occur and facilitating emergency procedures, thereby minimizing unknown risks and impacts. Specifically, the management department of the circuit equipment undergoing firmware upgrades can be required to prepare emergency response plans and conduct on-site drills based on these plans to familiarize themselves with the specific handling procedures and methods.

[0059] Among these measures, a safety inspection of the construction site is conducted to familiarize oneself with the site's conditions, reduce the occurrence of accidents, and improve the reliability and stability of online firmware upgrades for protection devices.

[0060] In some possible embodiments provided in this application, a safety protection inspection of the construction site conditions is carried out, specifically including: Confirm the location of the protection devices to be upgraded at the construction site; Record the data information of the protection device to be upgraded; Confirm the operating status of the electrical equipment connected to the power supply circuit; Confirm the power supply range of the power supply circuit.

[0061] This includes confirming the location of the protection device to be upgraded at the construction site. For example, confirming the location of the protection device to be upgraded, such as the SEL-351A protection device to be upgraded, at the construction site. This will improve the efficiency of staff reaching the protection device to be upgraded, reduce the possibility of misoperation, and improve construction efficiency.

[0062] Record the data information of the protection device to be upgraded, clarify the circuit dispatch number of the protection device to be upgraded, process the operation work ticket and implement the tagging, and take good safety isolation measures; record the nameplate data of the protection device to be upgraded, including the model (P / N) and serial number (S / N), and save the list.

[0063] Confirming the operating status of the electrical equipment connected to the power supply circuit, as well as the circuit number of the protection device to be upgraded, the operating status of the equipment connected to the power supply circuit, and the power supply range of the power supply circuit, can reduce the possibility of misoperation and improve construction efficiency.

[0064] Among these requirements, it is essential to be familiar with and master the circuit principles and diagrams of the high-voltage switchgear for firmware upgrades. For example, the secondary schematic diagram of the high-voltage switchgear for the circuit to be upgraded online must be fully prepared. The lines and points of the secondary protection tripping, remote control opening and closing schematic diagrams must be familiar, clear, understood and accurate to reduce the possibility of misoperation and improve construction efficiency.

[0065] Understandably, the preparatory work for online firmware upgrades of protection devices may also include other operations, such as preparing tools and completing construction procedures.

[0066] The main tools and instruments are configured as follows: a debugging laptop, a desktop communication cable, an SEL-351A protection device, a low-voltage tester, a multimeter, insulating tape, and auxiliary materials.

[0067] Among these measures, relevant procedures can be completed in advance based on the construction unit, construction personnel, and construction requirements to ensure the smooth operation of the online upgrade protection device. This includes procedures such as power outage work permits, safety briefings, and hazard identification.

[0068] Specifically, such as Figure 2 As shown, the following describes a construction method for online upgrade of protection device firmware provided in this application embodiment, taking 18 SEL-351A protection devices on the Shaogang microcomputer integrated protection device as an example.

[0069] Step S201: Overall planning of firmware upgrade scheme.

[0070] Due to full production at Shaogang Steel, there are currently no plans for power outages for maintenance. Therefore, the SEL-351A protection devices are operating online and cannot be updated via power outage. Failure to update the firmware in a timely manner will also pose a power supply risk. If a short circuit fault occurs in the power supply circuit, and the protection device fails to trip due to the lack of timely firmware updates, it will not only affect the device itself but also the power supply of other users, causing the accident to escalate and affecting more users. Therefore, it is necessary to complete the firmware upgrade of these 18 SEL-351A protection devices as soon as possible. The firmware upgrade can only be completed by upgrading the protection devices without interrupting the power supply circuit. To prevent the circuit breaker from tripping erroneously during the firmware upgrade process, the online firmware upgrade method provided in this application should be used to ensure the normal operation of the load on the operating equipment. The firmware upgrade for each protection device takes approximately 30 minutes. A comprehensive plan for the firmware upgrade of the 18 SEL-351A protection devices should be developed to improve the accuracy of all tasks and prevent erroneous protection tripping during the construction process.

[0071] Step 202: Perform a firmware upgrade test on the backup protection device.

[0072] The backup protection device is from the same batch and version as the protection group device to be upgraded; however, the backup protection device is not used on the Shaogang microcomputer integrated protection device. Therefore, after the backup SEL-351A protection device of the same batch and version is offline with firmware updated, an upgrade operation is performed. This involves updating the firmware of the backup protection device's self-test program using protection software, testing the updated self-test program for protection functions, and ensuring that the updated self-test program is error-free. Then, other SEL-351A protection devices of the same batch and version on the Shaogang microcomputer integrated protection device are upgraded online one by one.

[0073] Step S203: Investigate the on-site situation.

[0074] The location, circuit number, equipment operating status, and power supply range of the SEL-351A protection device to be upgraded should be thoroughly investigated at the construction site.

[0075] Step S204: Familiarize yourself with the drawings and documents.

[0076] The secondary schematic diagrams of the high-voltage switchgear circuit to be upgraded online must be fully prepared. The lines and points of the secondary protection trip, remote control opening and closing schematic diagrams must be familiar, clear, understood and correct, so as to be fully prepared.

[0077] Step S205: Prepare an emergency response plan for the accident.

[0078] The department responsible for managing the circuit equipment undergoing firmware upgrades is requested to prepare an emergency response plan, conduct on-site drills based on the plan, and familiarize themselves with the specific handling procedures and methods.

[0079] Step S206: Complete the construction permit procedures.

[0080] This construction project was jointly undertaken by the SEL protection device manufacturer and the user. Relevant construction procedures, such as power outage work permits, safety briefings, and hazard identification, needed to be completed in advance.

[0081] Step S207: Prepare tools and equipment.

[0082] The main tools and instruments are configured as follows: a debugging laptop, a desktop communication cable, an SEL-351A protection device, a low-voltage tester, a multimeter, insulating tape, and auxiliary materials. It is understood that the protection software is stored on the debugging laptop.

[0083] Step S208: Record relevant data of the protection device.

[0084] Clearly identify the circuit dispatch number to be protected by firmware upgrade, process the operation work order and implement tagging, and take good safety isolation measures; record the nameplate data of the protection device to be upgraded, including the model (P / N) and serial number (S / N), and save it in a list.

[0085] Step S209: Exit the protective outlet pressure plate.

[0086] Check the secondary schematic diagram of the circuit, identify the protection trip output pressure plate, and disconnect it. If there is a remote control opening and closing function, switch the remote control transfer switch to the home position to isolate all protection outputs from the trip circuit.

[0087] Step S210: Read the protection device parameters.

[0088] Connect the laptop and the protection device's communication interface using a network cable, read the parameters (logic, settings, communication) inside the protection device to be upgraded, and back them up for easy comparison with the upgraded parameters.

[0089] Step S211: Check the word position status of the protection device.

[0090] Use a laptop to check the status of all inputs and outputs of the protection device using the TAR command, and record the information. After the technicians have completed these steps and confirmed their accuracy, and after the safety supervisor and construction manager have confirmed their correctness, the next step can proceed.

[0091] Step S212: Upgrade firmware online.

[0092] Technicians used SEL software to perform online firmware updates on the SEL-351A protection device to be upgraded. During the upgrade process, the power supply to the protection device and the control power supply to the circuit breaker must not be interrupted. Monitoring personnel closely monitored the status of the high-voltage cabinet, secondary signals, meters, etc.

[0093] Step S213: Check and verify each parameter.

[0094] After the protection device firmware upgrade is complete, use the STA command to perform a self-test and check the recorded firmware version number. The device self-test status should be normal, indicating it is in the operational state. Then, re-perform the parameter reading and backup operation, and compare it with the parameters backed up in step S210 to ensure that they are consistent with the original application function parameters.

[0095] Step S214: Recheck the word status of the protection device.

[0096] Use the TAR command to check the input and output bit status of the protection device, which should be consistent with the bit status backed up in step S211.

[0097] Step S215: Check the communication between the protection device and the backend.

[0098] Check that the communication between the protection device and the backend, and that the telemetry parameters are normal. The remote signaling and protection signals should be consistent with those before the upgrade. This step is not applicable if there is no backend communication equipment.

[0099] Step S216: Restore the protective pressure plate.

[0100] Referring to the secondary circuit diagram, use a multimeter to check that the voltage of the protection output and protection pressure plate is correct, and restore the protection trip output pressure plate and remote control changeover switch to the remote position.

[0101] Step S217: End the firmware upgrade process.

[0102] After completing the above steps, checking that the protection equipment is operating normally, removing the plaques from all three parties, submitting the work order, cleaning up the construction site, and completing the firmware upgrade of the protection device, the work is finished.

[0103] The online firmware upgrade method for the protection device provided in this application allows for online firmware upgrades of the SEL-351A protection device without power outages. This eliminates frequent blocking of the protection device, ensuring its normal operation and maintaining continuous power supply without affecting normal production. Therefore, this method enables uninterrupted online firmware upgrades while preventing accidental tripping of circuit breakers during the upgrade process, ensuring power continuity. Furthermore, the upgraded protection device eliminates frequent blocking, ensuring its normal operation and making it suitable for widespread application.

[0104] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application. Those skilled in the art will understand that the modules in the apparatus of the embodiment can be distributed within the apparatus of the embodiment as described, or can be modified to be located in one or more apparatuses different from this embodiment. The modules of the above-described embodiment can be combined into one module, or further divided into multiple sub-modules.

[0105] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of any particular implementation scenario. The above disclosures are merely a few specific implementation scenarios of this application; however, this application is not limited thereto, and any variations conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A method for constructing an online upgrade protection device firmware, characterized in that, include: Remove the protection output pressure plate of the power supply circuit containing the protection device to be upgraded; Perform online firmware upgrades on the protection device; Restore the protection output pressure plate of the power supply circuit.

2. The construction method for the online upgrade protection device firmware according to claim 1, characterized in that, The step of performing an online firmware upgrade on the protection device includes: The self-test program of the protection device is updated using protection software; During the upgrade process, ensure that the power supply to the protection device to be upgraded and the control power supply of the power supply circuit are not interrupted.

3. The construction method for the online upgrade protection device firmware according to claim 2, characterized in that, Before the step of removing the protection output pressure plate of the power supply circuit containing the protection device to be upgraded, the method further includes: Perform functional tests on the self-test program in the protection software to ensure that the functional tests meet the requirements.

4. The construction method for the online upgrade protection device firmware according to claim 3, characterized in that, The steps for performing functional tests on the self-test program of the protection software include: The backup protection device is upgraded offline using the protection software. The backup protection device and the protection device to be upgraded are from the same batch and have the same version. The functionality of the upgraded backup protection device was tested.

5. The construction method of the firmware for the online upgrade protection device according to any one of claims 1 to 4, characterized in that, Prior to the step of performing an online firmware upgrade on the protection device, the method further includes: Read and record the parameter information of the protection device to be upgraded; After the step of performing an online firmware upgrade on the protection device, the method further includes: Read and record the parameter information of the upgraded protection device; The parameter information to be upgraded and the upgraded parameter information are checked to ensure that the two parameter information are consistent.

6. The construction method for the firmware of the online upgrade protection device according to claim 5, characterized in that, Before the step of reading and recording the parameter information of the upgraded protection device, the method further includes: Perform a self-test on the upgraded protection device to ensure that the protection device is in normal condition and in the activated state.

7. The construction method for the online upgrade protection device firmware according to claim 5, characterized in that, The parameter information includes at least one of protection settings, logic, and communication.

8. The method for constructing the firmware of the online upgrade protection device according to any one of claims 1 to 4, characterized in that, Prior to the step of performing an online firmware upgrade on the protection device, the method further includes: Read and record the word position status information of the protection device to be upgraded; After the step of performing an online firmware upgrade on the protection device, the method further includes: Read and record the word position status information of the upgraded protection device; The character position status information to be upgraded and after the upgrade are checked to ensure that the two character position status information are consistent.

9. The method for constructing the firmware of the online upgrade protection device according to any one of claims 1 to 4, characterized in that, Before the step of removing the protection output pressure plate of the power supply circuit containing the protection device to be upgraded, the method further includes: Develop construction plans and emergency response plans; Conduct safety inspections of the construction site conditions; Be familiar with and master the circuit principles and diagrams of the high-voltage switchgear for firmware upgrades.

10. The construction method for the firmware of the online upgrade protection device according to claim 9, characterized in that, The steps for conducting a safety inspection of the construction site include: Confirm the location of the protection device to be upgraded at the construction site; Record the data information of the protection device to be upgraded; Confirm the operating status of the electrical equipment connected to the power supply circuit; The power supply range of the power supply circuit is confirmed.

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