A microcomputer bus protection interval maintenance method and device

Abstract

The application discloses a microcomputer bus protection interval maintenance method and device, interval maintenance pressing plates are arranged for each interval, the maintenance state of the interval is effectively identified by switching on and off the interval maintenance pressing plates, the interval is exited from the protection function logic calculation when the maintenance is effective, and the complicated operation mode of exiting the interval current from the protection function logic by opening the AC circuit in the existing operation mode is replaced. The method and device of the application bring great convenience for the interval maintenance on the basis of ensuring the operation reliability, can greatly improve the efficiency of the bus protection interval maintenance, and reduce the operation burden of the operation and maintenance personnel.

Description

Technical Field

[0001] This invention belongs to the field of relay protection technology, specifically relating to a method and device for overhauling a microcomputer busbar protection bay. Background Technology

[0002] Microprocessor-based busbar protection devices are an important component of the first line of defense in power transmission systems, providing electrical protection for substation busbars. Substation busbars typically connect several incoming and outgoing lines, including various types of power supply and load transmission lines, making microprocessor-based busbar protection devices typical cross-bay and multi-bay relay protection devices.

[0003] Because the busbar connects numerous electrical bays, if the microprocessor-based busbar protection is switched from operation to shutdown when a bay is under maintenance, the primary busbar will lose its main protection, posing a significant risk to the stable operation of the power system. In engineering implementation, to ensure the busbar protection remains operational and maintains its relay protection function for the primary busbar, the current practice is to manually isolate the current loop of the bay under maintenance from the analog input loop of the busbar protection during maintenance. This ensures that the analog input of the bay under maintenance no longer participates in the relay protection logic calculations of the busbar protection. After maintenance, the current loop of the bay under maintenance is restored. To ensure that the bay is free of abnormalities after maintenance, it may even be necessary to temporarily disconnect the entire busbar protection system and confirm that the analog and switching inputs of the bay under maintenance are correct before reconnecting the microprocessor-based busbar protection. Clearly, the disconnection and reconnection of the analog input loop increases labor costs and adds additional operational risks. Summary of the Invention

[0004] The purpose of this invention is to provide a method and apparatus for overhauling a microcomputer-controlled busbar protection bay, thereby reducing manual operations of disconnecting analog circuits during maintenance and improving the efficiency and convenience of busbar protection bay maintenance.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] According to a first aspect of this application, a method for overhauling a microcomputer busbar protection bay is proposed, wherein an overhaul pressure plate is installed in each bay of the busbar protection device; the method includes:

[0007] Detect the engagement / disengagement status of the maintenance pressure plate and collect the interval current;

[0008] Based on the engagement / disengagement status of the maintenance pressure plate and the interval current, determine whether the interval is in an effective maintenance state;

[0009] In response to the interval being in a maintenance active state, the interval is removed from the relay protection function calculation;

[0010] After removing the interval from the relay protection function calculation, the maintenance is determined to be completed based on the on / off status of the maintenance pressure plate and the interval current.

[0011] In response to the completion of maintenance, the interval is recalculated for relay protection function.

[0012] According to some embodiments, when a bay is in a maintenance active state and a maintenance instruction is received, the bay is removed from the relay protection function calculation.

[0013] According to some embodiments, when maintenance is completed and a maintenance completion instruction is received, the interval is recalculated for relay protection function.

[0014] According to some embodiments, determining whether a gap is in an effective maintenance state based on the engagement / disengagement status of the maintenance pressure plate and the gap current specifically includes:

[0015] If the interval is determined to be in a no-current state based on the interval current, and the interval's maintenance pressure plate is in the engaged state, then the interval is determined to be in a maintenance effective state.

[0016] According to some embodiments, the method for determining whether an interval is in a no-current state based on the interval current is: the interval current is less than a no-current threshold.

[0017] According to some embodiments, the relay protection function includes bus differential protection, failure protection and overcurrent protection.

[0018] According to some embodiments, in response to an interval being in a maintenance active state, the interval is removed from the relay protection function calculation, while the real-time sampling value display function is retained.

[0019] According to some embodiments, the method further includes: determining whether it is in an ineffective maintenance state based on the engagement / disengagement status of the maintenance pressure plate and the interval current;

[0020] An alarm signal is issued in response to the interval being in an invalid maintenance state, and the alarm signal is reset after the maintenance pressure plate is restored to normal.

[0021] According to some embodiments, the method for determining the maintenance invalid state is as follows: if the interval is determined to be in a current-carrying state based on the interval current, and the maintenance pressure plate of the interval is in the engaged state, then the interval is determined to be in a maintenance invalid state.

[0022] According to some embodiments, the method for determining whether an interval is in a current-carrying state based on the interval current is: the interval current is greater than or equal to a no-current threshold.

[0023] According to some embodiments, the determination of whether maintenance is over based on the engagement / disengagement status of the maintenance pressure plate and the interval current is specifically as follows: if the interval is determined to be in a no-current state based on the interval current and the maintenance pressure plate of the interval is in an out state, then the interval maintenance is determined to be over.

[0024] According to a second aspect of this application, a microcomputer busbar protection device is proposed, wherein a maintenance pressure plate is provided for each bay in the busbar protection device; the busbar protection device further includes:

[0025] The data acquisition unit is used to detect the engagement / disengagement status of the maintenance pressure plate and to acquire the interval current.

[0026] The maintenance effective state determination unit is used to determine whether the interval is in the maintenance effective state based on the on / off status of the maintenance pressure plate and the interval current.

[0027] An effective state handling unit is used to remove the interval from the relay protection function calculation in response to the interval being in a maintenance effective state.

[0028] The maintenance completion determination unit is used to determine whether the maintenance is completed based on the on / off status of the maintenance pressure plate and the interval current after the interval is removed from the relay protection function calculation.

[0029] A recovery unit is used to re-engage the interval with relay protection function calculation in response to the completion of maintenance.

[0030] According to some embodiments, the apparatus further includes:

[0031] The maintenance invalid state determination unit is used to determine whether the maintenance is in an invalid state based on the on / off status of the maintenance pressure plate and the interval current.

[0032] The invalid state handling unit is used to issue an alarm signal in response to the interval being in an invalid maintenance state, and to reset the alarm signal after the maintenance pressure plate returns to normal.

[0033] According to a third aspect of this application, an electronic device is provided, comprising: a processor; and a memory storing computer instructions, which, when executed by the processor, cause the processor to perform the aforementioned microcomputer busbar protection interval maintenance method.

[0034] According to a fourth aspect of this application, a non-transient computer storage medium is proposed, which stores a computer program that, when executed by multiple processors, causes the processors to perform the aforementioned microcomputer busbar protection interval maintenance method.

[0035] Beneficial effects:

[0036] The method described in this invention can avoid the operational and running risks caused by repeatedly opening and closing analog circuits during the maintenance of bus protection bays, reduce the operation cycle of bay maintenance, prevent bus protection from being taken out of operation during maintenance, and greatly improve the efficiency and operational reliability of bus protection bay maintenance. Attached Figure Description

[0037] Figure 1 This is a flowchart of a microcomputer busbar protection bay maintenance method according to an embodiment of the present invention;

[0038] Figure 2 This is a flowchart of another microcomputer busbar protection bay maintenance method according to an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of a microcomputer busbar protection device according to an embodiment of the present invention;

[0040] Figure 4 This is a structural diagram of an electronic device provided by the present invention. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0042] like Figure 1 The diagram shown is a flowchart illustrating a microprocessor-based busbar protection bay maintenance method according to an embodiment of the present invention. This embodiment's microprocessor-based busbar protection bay maintenance method requires the installation of a maintenance pressure plate in each bay of the busbar protection device. The maintenance pressure plate can be a hard pressure plate or a soft pressure plate. The method includes the following steps:

[0043] S100: Detects the engagement / disengagement status of the maintenance pressure plate and collects the interval current.

[0044] Detect the engagement / disengagement status of all maintenance check plates in all bays. If it is a hard check plate, detect its engagement / disengagement status based on its open / closed state; if it is a soft check plate, detect its engagement / disengagement status based on its set state. Collect the bay current for all bays.

[0045] S200: Based on the engagement / disengagement status of the maintenance pressure plate and the interval current, determine whether the interval is in an effective maintenance state.

[0046] Based on the engagement / disengagement status of the maintenance pressure plate in each bay and the bay current, it is determined whether each bay is in an effective maintenance state. Specifically, if the bay is determined to be in a no-current state based on the bay current, and the maintenance pressure plate of the bay is in the engaged state, then the bay is determined to be in an effective maintenance state.

[0047] The current value used for determining the current level in a given interval is typically the effective value of the current. If the effective value of the current in each phase is less than the no-current threshold, the interval is considered to be in a no-current state. The no-current threshold can range from 0 to 0.1In, where In is the rated current of the interval. A typical no-current threshold is 0.04In.

[0048] S300: In response to the interval being in a maintenance active state, the interval is removed from the relay protection function calculation.

[0049] If a certain bay is determined to be in a maintenance-enabled state, then this bay is removed from the relay protection function calculation; that is, this bay is not considered in the relay protection function criteria. The relay protection functions include bus differential protection, failure protection, and overcurrent protection.

[0050] In a preferred embodiment, when a bay is in a maintenance active state and a maintenance command is received, the bay is removed from the relay protection function calculation. Increasing the number of maintenance commands improves reliability.

[0051] In a preferred embodiment, although the protection function logic calculation for this interval is removed, the function of displaying real-time sampled values ​​is retained to facilitate viewing the sampling status of this interval during maintenance, including real-time display of analog and digital quantities.

[0052] S400: After removing the interval from the relay protection function calculation, determine whether the maintenance is completed based on the on / off status of the maintenance pressure plate and the interval current.

[0053] After removing the maintenance-active bay from the relay protection function calculation, the on / off status of the maintenance switch and the magnitude of the bay current are monitored to determine whether the maintenance is complete. Specifically, if the bay is determined to be in a no-current state based on the bay current and the maintenance switch is in the off state, then the bay maintenance is considered complete. The method for determining that the bay is in a no-current state is the same as described above and will not be repeated here.

[0054] S500: In response to the completion of maintenance, the interval is recalculated for relay protection function.

[0055] If it is determined that the interval for maintenance has been completed, then the relay protection function of this interval will be recalculated.

[0056] In a preferred embodiment, to ensure reliability, a maintenance end command is set. The interval is re-entered into relay protection function calculation only when the maintenance is completed and the maintenance end command is received.

[0057] This technical solution avoids the operational and running risks caused by repeatedly opening and closing analog circuits during busbar protection bay maintenance, reduces the maintenance cycle, prevents busbar protection from being taken out of service during maintenance, and greatly improves the efficiency and operational reliability of busbar protection bay maintenance.

[0058] In some embodiments, such as Figure 2 The flowchart shown also includes:

[0059] Step S600: Based on the on / off status of the maintenance pressure plate and the interval current, determine whether it is in an ineffective maintenance state.

[0060] Specifically, the method for determining an ineffective maintenance state is as follows: if the interval is determined to be in a current-carrying state based on the interval current, and the interval's maintenance pressure plate is in the engaged state, then the interval is determined to be in an ineffective maintenance state. The method for determining that the interval is in a current-carrying state based on the interval current is that the interval current is greater than or equal to a no-current threshold.

[0061] Step S700: In response to the interval being in an ineffective maintenance state, an alarm signal is issued, and the alarm signal is reset after the maintenance switch is restored to normal. This prevents operators from accidentally activating the maintenance switch in the operating interval, alerts maintenance personnel that the equipment is in an abnormal state, and resets the alarm signal after the maintenance switch is restored to normal.

[0062] like Figure 3 The image shows a microcomputer busbar protection device 800 provided in an embodiment of this application. The device is characterized by having a maintenance pressure plate 801 installed at each interval. The busbar protection device further includes:

[0063] The acquisition unit 802 is used to detect the engagement / disengagement status of the maintenance pressure plate and to acquire the interval current.

[0064] The maintenance effective state determination unit 803 is used to determine whether the interval is in the maintenance effective state based on the on / off status of the maintenance pressure plate and the interval current.

[0065] The effective state handling unit 804 is used to remove the interval from the relay protection function calculation in response to the interval being in the maintenance effective state.

[0066] The maintenance completion determination unit 805 is used to determine whether the maintenance is completed based on the on / off status of the maintenance pressure plate and the interval current after the interval is removed from the relay protection function calculation.

[0067] The recovery unit 806 is used to re-engage the relay protection function of the interval in response to the completion of maintenance.

[0068] In a preferred embodiment, the microcomputer busbar protection device 800 further includes, in addition to the aforementioned, a maintenance failure state determination unit 807 and a failure state handling unit 808. Wherein:

[0069] The maintenance invalid state determination unit 807 is used to determine whether it is in a maintenance invalid state based on the on / off status of the maintenance pressure plate and the interval current.

[0070] The invalid state handling unit 808 is used to issue an alarm signal in response to the interval being in an invalid maintenance state, and to reset the alarm signal after the maintenance pressure plate returns to normal.

[0071] The microcomputer busbar protection device 800 in this application performs a function similar to the aforementioned method, as detailed in the preceding description, which will not be repeated here.

[0072] See Figure 4 , Figure 4 An electronic device is provided, including a processor and a memory. The memory stores computer instructions, which, when executed by the processor, cause the processor to perform the computer instructions to achieve the following: Figure 1 and Figure 2 The method and its detailed scheme are shown.

[0073] It should be understood that the above-described device embodiments are merely illustrative, and the device disclosed in this invention can be implemented in other ways. For example, the division of units / modules described in the above embodiments is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units, modules, or components may be combined, integrated into another system, or some features may be ignored or not executed.

[0074] Furthermore, unless otherwise specified, the functional units / modules in the various embodiments of the present invention can be integrated into one unit / module, or each unit / module can exist physically separately, or two or more units / modules can be integrated together. The integrated units / modules described above can be implemented in hardware or as software program modules.

[0075] If the integrated unit / module is implemented in hardware, the hardware can be digital circuits, analog circuits, etc. The physical implementation of the hardware structure includes, but is not limited to, transistors, memristors, etc. Unless otherwise specified, the processor or chip can be any suitable hardware processor, such as a CPU, GPU, FPGA, DSP, and ASIC, etc. Unless otherwise specified, the on-chip cache, off-chip memory, and storage can be any suitable magnetic or magneto-optical storage medium, such as resistive random access memory (RRAM), dynamic random access memory (DRAM), static random access memory (SRAM), enhanced dynamic random access memory (EDRAM), high-bandwidth memory (HBM), hybrid memory cube (HMC), etc.

[0076] If the integrated unit / module is implemented as a software program module and sold or used as an independent product, it can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this 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 memory 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 described in the various embodiments of this disclosure. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0077] This invention also provides a non-transitory computer storage medium storing a computer program, which, when executed by multiple processors, causes the processors to perform actions such as... Figure 1 The method and its detailed scheme are shown.

[0078] This invention is not limited to the above embodiments. The descriptions in the above embodiments are only used to help understand the core ideas of this invention. Any modifications or equivalent substitutions made to this invention based on the ideas of this invention, as well as any changes made to the specific implementation methods and application scope, should fall within the protection scope of this invention.

Claims

1. A method for overhauling a microcomputer-controlled busbar protection bay, characterized in that, In the busbar protection device, a maintenance pressure plate is installed for each bay; the method includes: Detect the engagement / disengagement status of the maintenance pressure plate and collect the interval current; Based on the engagement / disengagement status of the maintenance pressure plate and the interval current, it is determined whether the interval is in an effective maintenance state. Specifically, if the interval is determined to be in a no-current state based on the interval current and the maintenance pressure plate of the interval is in the engaged state, then the interval is determined to be in an effective maintenance state. In response to the interval being in a maintenance active state, the interval is removed from the relay protection function calculation; After removing the interval from the relay protection function calculation, the maintenance is determined to be completed based on the on / off status of the maintenance pressure plate and the interval current. Specifically, if the interval is determined to be in a no-current state based on the interval current and the maintenance pressure plate of the interval is in an off state, then the interval maintenance is determined to be completed. In response to the completion of maintenance, the interval is recalculated for relay protection function.

2. The method according to claim 1, characterized in that, When a bay is in a maintenance active state and a maintenance command is received, the bay is removed from the relay protection function calculation.

3. The method according to claim 1, characterized in that, When the maintenance is completed and a maintenance completion instruction is received, the interval is recalculated for relay protection function.

4. The method according to claim 1, characterized in that, The method for determining whether an interval is in a no-current state based on the interval current is: the interval current is less than the no-current threshold.

5. The method according to claim 1, characterized in that, The relay protection functions include bus differential protection, failure protection, and overcurrent protection.

6. The method according to claim 1, characterized in that, In response to the interval being in a maintenance active state, the interval is removed from the relay protection function calculation, while the real-time sampling value display function is retained.

7. The method according to claim 1, characterized in that, Also includes: Based on the on / off status of the maintenance pressure plate and the interval current, determine whether it is in an ineffective maintenance state; An alarm signal is issued in response to the interval being in an invalid maintenance state, and the alarm signal is reset after the maintenance pressure plate is restored to normal.

8. The method according to claim 7, characterized in that, The method for determining the maintenance invalid state is as follows: if the interval is determined to be in a current-carrying state based on the interval current, and the maintenance pressure plate of the interval is in the engaged state, then the interval is determined to be in a maintenance invalid state.

9. The method according to claim 8, characterized in that, The method for determining whether an interval is in a current-carrying state based on the interval current is: the interval current is greater than or equal to a non-current threshold.

10. A microcomputer busbar protection device, characterized in that, The busbar protection device includes a maintenance pressure plate for each bay; the busbar protection device also includes: The data acquisition unit is used to detect the engagement / disengagement status of the maintenance pressure plate and to acquire the interval current. The maintenance effective state determination unit is used to determine whether the interval is in the maintenance effective state based on the engagement / disengagement status of the maintenance pressure plate and the interval current. Specifically, it includes: if the interval is determined to be in a no-current state based on the interval current and the maintenance pressure plate of the interval is in the engagement state, then the interval is determined to be in the maintenance effective state. An effective state handling unit is used to remove the interval from the relay protection function calculation in response to the interval being in a maintenance effective state. The maintenance completion determination unit is used to determine whether the maintenance is completed based on the on / off status of the maintenance pressure plate and the interval current after the interval is removed from the relay protection function calculation. Specifically, if the interval is determined to be in a no-current state based on the interval current and the maintenance pressure plate of the interval is in an off state, then the interval maintenance is determined to be completed. A recovery unit is used to re-engage the interval with relay protection function calculation in response to the completion of maintenance.

11. The apparatus according to claim 10, characterized in that, Also includes: The maintenance invalid state determination unit is used to determine whether the maintenance is in an invalid state based on the on / off status of the maintenance pressure plate and the interval current. The invalid state handling unit is used to issue an alarm signal in response to the interval being in an invalid maintenance state, and to reset the alarm signal after the maintenance pressure plate returns to normal.

12. An electronic device, characterized in that, include: processor; as well as A memory storing computer instructions that, when executed by the processor, cause the processor to perform the method according to any one of claims 1-9.

13. A non-transitory computer storage medium, characterized in that, The device contains a computer program that, when executed by a plurality of processors, causes the processors to perform the method described in any one of claims 1-9.

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