A method and related devices for monitoring the operating status of relay protection devices

Abstract

This application discloses a method and related apparatus for monitoring the operating status of a relay protection device. The method includes: acquiring SOE fault information and relay protection settings of the relay protection device; determining the length of a unit event time based on the SOE fault information and relay protection settings, according to the feeder to which the relay protection device belongs, and calculating the event recording range of the feeder where the fault occurred based on the event time; within the event recording range, if the relay protection device lacks SOE fault information, determining that the relay protection device is offline or powered off; when the relay protection device has SOE fault information, analyzing the relay protection device based on the SOE fault information to obtain the status of the relay protection device. This method can identify common faults in relay protection devices without requiring any software or hardware modifications to the existing relay protection master station and relay protection device, thus solving the problem of high cost in monitoring the operating status of relay protection devices in existing technologies.

Description

Technical Field

[0001] This application relates to the field of relay protection device technology, and in particular to a method and related device for monitoring the operating status of a relay protection device. Background Technology

[0002] When a power system fault occurs, relay protection devices can quickly isolate the fault. However, relay protection devices have a complex internal structure, contain many electronic components, and operate outdoors for extended periods, making stable operation crucial. Ensuring the normal operation of relay protection devices involves two aspects: 1. The relay protection device itself must function normally, including normal startup, online connection, ability to disconnect the switch upon detecting a fault current, and timely transmission of information to the master station; 2. The relay protection settings must be correct. Correct settings are essential for ensuring proper disconnection or reclosing of the switch.

[0003] Currently, the monitoring and verification of relay protection devices generally rely on manual analysis. While automated solutions exist, they typically require modifications to the master station system and communication protocols. In power systems, such intrusive modifications necessitate the re-commissioning of all equipment, resulting in increased manpower, longer processing times, and reduced power supply reliability. There is an urgent need for a solution that can quickly and automatically monitor and verify relay protection settings without modifying existing hardware or software. Summary of the Invention

[0004] This application provides a method and related apparatus for monitoring the operating status of relay protection devices, which solves the technical problem that the existing technology requires modifications to existing software and hardware, resulting in high costs for monitoring the operating status of relay protection devices.

[0005] In view of this, the first aspect of this application provides a method for monitoring the operating status of a relay protection device, the method comprising:

[0006] S1. Obtain SOE fault information and relay protection settings from the relay protection device;

[0007] S2. Based on the SOE fault information and the relay protection setting, determine the length of a unit event time according to the feeder to which the relay protection device belongs, and calculate the event record range of the feeder where the fault occurred based on the event time.

[0008] S3. Within the scope of the event record, if the relay protection device lacks SOE fault information, it is determined that the relay protection device is offline or powered off.

[0009] S4. When the relay protection device has SOE fault information, compare the occurrence time of the event recorded in the SOE fault information with the reception time of the relay protection master station, compare the action information in the SOE fault information with the reset signal, compare the protection information and switch action in the SOE fault information, and compare the switch opening and closing time in the SOE fault information with the corresponding set reclosing time. Analyze the status of the relay protection device based on the comparison results.

[0010] Optionally, step S4 specifically includes:

[0011] When the relay protection device has SOE fault information, the occurrence time recorded in the SOE fault information is compared with the reception time of the relay protection master station. If the difference between the occurrence time and the reception time is not within the preset range, it is determined that the relay protection device has a time synchronization error.

[0012] When the relay protection device has SOE fault information, all action information in the SOE fault information is acquired. If one or more of the action information does not have a corresponding reset signal, it is determined that the relay protection device cannot automatically reset.

[0013] When the relay protection device has SOE fault information, the protection information and switch action in the SOE fault information are compared. If there is one or more protection information without corresponding switch action, it is determined that the relay protection device switch fails to operate.

[0014] When a relay protection device has an SOE fault message, if the time difference between the opening and closing of the switch in the SOE fault message is not equal to the corresponding set reclosing time, then the reclosing time of the relay protection device is determined to be abnormal.

[0015] Optionally, obtaining the SOE fault information and relay protection settings of the relay protection device specifically includes:

[0016] SOE fault information of relay protection devices is extracted from the SCADA master station, and the SOE fault information is preprocessed into structured data by regular expression matching and classification.

[0017] The relay protection settings of the relay protection device are obtained from the setting library based on the name of the plant, feeder, or component to which the relay protection device belongs.

[0018] Optionally, it also includes:

[0019] An analysis report is generated based on the status analysis results of the relay protection device in steps S3 and S4.

[0020] A second aspect of this application provides a relay protection device operation status monitoring system, the system comprising:

[0021] The acquisition unit is used to acquire SOE fault information and relay protection settings of the relay protection device;

[0022] The calculation unit is used to determine the length of a unit of event time based on the SOE fault information and the relay protection setting, according to the feeder to which the relay protection device belongs, and to calculate the event record range of the feeder where the fault occurred based on the event time.

[0023] The first monitoring unit is used to determine that the relay protection device is offline or powered off when the relay protection device lacks SOE fault information within the event recording range.

[0024] The second monitoring unit is used to compare the occurrence time of the event recorded in the SOE fault information with the reception time of the relay protection master station when the relay protection device has SOE fault information, compare the action information in the SOE fault information with the reset signal, compare the protection information and switch action in the SOE fault information, and compare the switch opening and closing time in the SOE fault information with the corresponding set reclosing time, and analyze the status of the relay protection device based on the comparison results.

[0025] Optionally, the second monitoring unit is specifically used for:

[0026] When the relay protection device has SOE fault information, the occurrence time recorded in the SOE fault information is compared with the reception time of the relay protection master station. If the difference between the occurrence time and the reception time is not within the preset range, it is determined that the relay protection device has a time synchronization error.

[0027] When the relay protection device has SOE fault information, all action information in the SOE fault information is acquired. If one or more of the action information does not have a corresponding reset signal, it is determined that the relay protection device cannot automatically reset.

[0028] When the relay protection device has SOE fault information, the protection information and switch action in the SOE fault information are compared. If there is one or more protection information without corresponding switch action, it is determined that the relay protection device switch fails to operate.

[0029] When a relay protection device has an SOE fault message, if the time difference between the opening and closing of the switch in the SOE fault message is not equal to the corresponding set reclosing time, then the reclosing time of the relay protection device is determined to be abnormal.

[0030] Optionally, the acquisition unit is specifically used for:

[0031] SOE fault information of relay protection devices is extracted from the SCADA master station, and the SOE fault information is preprocessed into structured data by regular expression matching and classification.

[0032] The relay protection settings of the relay protection device are obtained from the setting library based on the name of the plant, feeder, or component to which the relay protection device belongs.

[0033] Optionally, it also includes: a generation unit;

[0034] The generation unit is used to generate an analysis report based on the status analysis results of the relay protection device by the first monitoring unit and the second monitoring unit.

[0035] A third aspect of this application provides a relay protection device operation status monitoring device, the device comprising a processor and a memory:

[0036] The memory is used to store program code and transmit the program code to the processor;

[0037] The processor is used to execute the steps of the relay protection device operation status monitoring method as described in the first aspect above, according to the instructions in the program code.

[0038] The fourth aspect of this application provides a computer-readable storage medium for storing program code for executing the relay protection device operation status monitoring method described in the first aspect above.

[0039] As can be seen from the above technical solutions, this application has the following advantages:

[0040] This application provides a method for monitoring the operating status of a relay protection device, including: S1, acquiring SOE fault information and relay protection settings of the relay protection device; S2, based on the SOE fault information and relay protection settings, determining the length of a unit event time according to the feeder to which the relay protection device belongs, and calculating the event recording range of the feeder where the fault occurred based on the event time; S3, within the event recording range, if the relay protection device lacks SOE fault information, determining that the relay protection device is offline or shut down; S4, when the relay protection device has SOE fault information, comparing the occurrence time recorded in the event in the SOE fault information with the reception time of the relay protection master station, comparing the action information in the SOE fault information with the reset signal, comparing the protection information in the SOE fault information with the switch action, and comparing the switch opening and closing time in the SOE fault information with the corresponding set reclosing time, and analyzing the status of the relay protection device based on the comparison results. Compared with existing technologies, the monitoring method of this application does not require any software or hardware modifications to the existing relay protection master station and relay protection device, and can identify common faults of relay protection devices, thereby solving the technical problem of high cost of monitoring the operating status of relay protection devices in existing technologies. Attached Figure Description

[0041] Figure 1 This is a flowchart illustrating an embodiment of a relay protection device operation status monitoring method provided in this application.

[0042] Figure 2 This is a schematic diagram of the structure of an embodiment of a relay protection device operation status monitoring system provided in this application. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0044] Please see Figure 1 The present application provides a method for monitoring the operating status of a relay protection device, comprising:

[0045] Step 101: Obtain SOE fault information and relay protection settings from the relay protection device;

[0046] It should be noted that this embodiment first extracts relevant SOE fault information from the SCADA master station. This SOE fault information includes at least the occurrence time, substation name, feeder name, component name, SOE time, and component ID. Then, it preprocesses the SOE fault information generated by the relay protection device into structured data using regular expression matching and classification. Next, it matches the relevant relay protection settings of the relay protection device from the setting library using information such as substation name, feeder name, or component name, including primary reclosing time, secondary reclosing time, and automatic fault reset time.

[0047] Step 102: Based on SOE fault information and relay protection settings, determine the length of a unit event time according to the feeder to which the relay protection device belongs, and calculate the event record range of the feeder where the fault occurred based on the event time.

[0048] Regarding the timing of the event, it should be noted that:

[0049] The length of a unit event time is calculated by reading the relay protection settings of the feeder involved in the SOE fault information.

[0050] Event time = max(first overlap time) + max(second overlap time)

[0051] Regarding the scope of event logging, it should be noted that:

[0052] The analysis and judgment of the faulty feeder is based on the scope of the event log. For a single feeder:

[0053] Event logging range = [First occurrence time of SOE fault information + First occurrence time of SOE fault information + Event time]

[0054] Step 103: Within the event log range, if the relay protection device lacks SOE fault information, it is determined that the relay protection device is offline or powered off.

[0055] It should be noted that within the scope of the event log, SOE fault information of all relay protection devices on the fault feeder is read. If any relay protection device upstream of the terminal action relay protection device is missing SOE fault information, it is determined that the device is offline or shut down.

[0056] Step 104: When the relay protection device has SOE fault information, compare the occurrence time of the event recorded in the SOE fault information with the reception time of the relay protection master station, compare the action information in the SOE fault information with the reset signal, compare the protection information and switch action in the SOE fault information, and compare the switch opening and closing time in the SOE fault information with the corresponding set reclosing time. Analyze the status of the relay protection device based on the comparison results.

[0057] The following is a description of the status determination method for relay protection devices in this embodiment:

[0058] 1) Compare the occurrence time recorded by SOE fault information with the time received by the relay protection master station. Considering the delay in wireless public network communication, it is generally assumed that the time difference between the two is within 5 seconds as normal.

[0059] |SOE fault occurrence time - relay protection master station reception time| ≤ 5s

[0060] 2) By recording each action information of SOE fault information and putting it into an array, it is removed from the array only when the corresponding reset signal is encountered within its "automatic reset" time. In this way, relay protection devices that cannot automatically reset to SOE fault action signals can be screened out.

[0061] 3) By comparing SOE protection information with SOE switch action information, if protection action signals such as "overcurrent stage I" or "zero-sequence overcurrent stage I" appear, corresponding switch tripping information will definitely appear simultaneously; if protection action signals such as "primary reclosing" or "secondary reclosing" appear, corresponding switch closing information will definitely appear simultaneously. If either of the above occurs, it indicates that the relay protection device fails to operate.

[0062] 4) Read the switch opening and closing time difference in the SOE fault information. If the time difference is equal to the set single reclosing time, it proves that the reclosing time of the relay protection device is normal.

[0063] The closing time after a reclosing protection signal is received - the opening time after an overcurrent protection signal is received = the single reclosing time of the setting value;

[0064] The closing time after the secondary reclosing protection signal appears - the opening time after the overcurrent protection signal appears = the set value single secondary reclosing time;

[0065] Furthermore, after step 104, an analysis report is generated based on the status analysis results of the relay protection device in steps 103 and 104, so that users can intuitively understand the operating status of the relay protection device.

[0066] This embodiment presents a relay protection device operation monitoring and verification method based on SOE fault information. It requires no software or hardware modifications to the existing relay protection master station or the relay protection device. It only needs to read SOE fault information through API interfaces or offline CSV / XLS tables to identify most common faults in relay protection devices, such as: 1. Time inconsistency between the relay protection device and the master station; 2. Inconsistency between the relay protection device's reclosing time and the setting sheet; 3. The relay protection device is offline or not powered on; 4. The relay protection device cannot automatically reset to the action signal; 5. The relay protection device malfunctions or fails to operate. In addition to real-time monitoring, it can also import historical data to promptly detect historical faults in the relay protection device. This solves the technical problem of high costs associated with monitoring the operation status of relay protection devices due to the need for modifications to existing software and hardware in existing technologies.

[0067] The above is a method for monitoring the operating status of a relay protection device provided in the embodiments of this application. The following is a system for monitoring the operating status of a relay protection device provided in the embodiments of this application.

[0068] Please see Figure 2 The present application provides a method for monitoring the operating status of a relay protection device, comprising:

[0069] Acquisition unit 201 is used to acquire SOE fault information and relay protection settings of the relay protection device;

[0070] The calculation unit 202 is used to determine the length of a unit of event time based on SOE fault information and relay protection settings, according to the feeder to which the relay protection device belongs, and to calculate the event record range of the feeder where the fault occurred based on the event time.

[0071] The first monitoring unit 203 is used to determine that the relay protection device is offline or powered off when the relay protection device lacks SOE fault information within the event recording range.

[0072] The second monitoring unit 204 is used to compare the occurrence time of the event recorded in the SOE fault information with the reception time of the relay protection master station when the relay protection device has SOE fault information, compare the action information in the SOE fault information with the reset signal, compare the protection information and switch action in the SOE fault information, and compare the switch opening and closing time in the SOE fault information with the corresponding set reclosing time, and analyze the status of the relay protection device based on the comparison results.

[0073] Furthermore, this application embodiment also provides a relay protection device operation status monitoring 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 relay protection device operation status monitoring method described in the above method embodiment according to the instructions in the program code.

[0076] Furthermore, this application embodiment also provides a computer-readable storage medium for storing program code, which is used to execute the relay protection device operation status monitoring method described in the above method embodiment.

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

[0078] The terms "first," "second," "third," "fourth," etc., used in this application's specification and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0079] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0080] In the several embodiments provided in this application, 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 an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0081] 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.

[0082] Furthermore, the functional units in the various embodiments of this application 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.

[0083] 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 this application, 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 described in the various embodiments of this application. The aforementioned storage medium includes: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media capable of storing program code.

[0084] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 this application.

Claims

1. A method for monitoring the operating status of a relay protection device, characterized in that, include: S1. Obtain SOE fault information and relay protection settings from the relay protection device; S2. Based on the SOE fault information and the relay protection setting, determine the length of a unit event time according to the feeder to which the relay protection device belongs, and calculate the event record range of the feeder where the fault occurred based on the event time. Wherein, event time = max(first overlap time) + max(second overlap time); Event logging range = [first occurrence time of SOE fault information, first occurrence time of SOE fault information + event time]; S3. Within the scope of the event record, if the relay protection device lacks SOE fault information, it is determined that the relay protection device is offline or powered off. S4. When the relay protection device has SOE fault information, compare the occurrence time of the event recorded in the SOE fault information with the reception time of the relay protection master station, compare the action information in the SOE fault information with the reset signal, compare the protection information and switch action in the SOE fault information, and compare the switch opening and closing time in the SOE fault information with the corresponding set reclosing time. Analyze the status of the relay protection device based on the comparison results.

2. The method for monitoring the operating status of a relay protection device according to claim 1, characterized in that, Step S4 specifically includes: When the relay protection device has SOE fault information, the occurrence time recorded in the SOE fault information is compared with the reception time of the relay protection master station. If the difference between the occurrence time and the reception time is not within the preset range, it is determined that the relay protection device has a time synchronization error. When the relay protection device has SOE fault information, all action information in the SOE fault information is acquired. If one or more of the action information does not have a corresponding reset signal, it is determined that the relay protection device cannot automatically reset. When the relay protection device has SOE fault information, the protection information and switch action in the SOE fault information are compared. If there is one or more protection information without corresponding switch action, it is determined that the relay protection device switch fails to operate. When a relay protection device has an SOE fault message, if the time difference between the opening and closing of the switch in the SOE fault message is not equal to the corresponding set reclosing time, then the reclosing time of the relay protection device is determined to be abnormal.

3. The method for monitoring the operating status of a relay protection device according to claim 1, characterized in that, The acquisition of SOE fault information and relay protection settings of the relay protection device specifically includes: SOE fault information of relay protection devices is extracted from the SCADA master station, and the SOE fault information is preprocessed into structured data by regular expression matching and classification. The relay protection settings of the relay protection device are obtained from the setting library based on the name of the plant, feeder, or component to which the relay protection device belongs.

4. The method for monitoring the operating status of a relay protection device according to claim 1, characterized in that, Step S4, followed by: An analysis report is generated based on the status analysis results of the relay protection device in steps S3 and S4.

5. A relay protection device operation status monitoring system, characterized in that, include: The acquisition unit is used to acquire SOE fault information and relay protection settings of the relay protection device; The calculation unit is used to determine the length of a unit of event time based on the SOE fault information and the relay protection setting, according to the feeder to which the relay protection device belongs, and to calculate the event record range of the feeder where the fault occurred based on the event time. Wherein, event time = max(first overlap time) + max(second overlap time); Event logging range = [first occurrence time of SOE fault information, first occurrence time of SOE fault information + event time]; The first monitoring unit is used to determine that the relay protection device is offline or powered off when the relay protection device lacks SOE fault information within the event recording range. The second monitoring unit is used to compare the occurrence time of the event recorded in the SOE fault information with the reception time of the relay protection master station when the relay protection device has SOE fault information, compare the action information in the SOE fault information with the reset signal, compare the protection information and switch action in the SOE fault information, and compare the switch opening and closing time in the SOE fault information with the corresponding set reclosing time, and analyze the status of the relay protection device based on the comparison results.

6. The relay protection device operation status monitoring system according to claim 5, characterized in that, The second monitoring unit is specifically used for: When the relay protection device has SOE fault information, the occurrence time recorded in the SOE fault information is compared with the reception time of the relay protection master station. If the difference between the occurrence time and the reception time is not within the preset range, it is determined that the relay protection device has a time synchronization error. When the relay protection device has SOE fault information, all action information in the SOE fault information is acquired. If one or more of the action information does not have a corresponding reset signal, it is determined that the relay protection device cannot automatically reset. When the relay protection device has SOE fault information, the protection information and switch action in the SOE fault information are compared. If there is one or more protection information without corresponding switch action, it is determined that the relay protection device switch fails to operate. When a relay protection device has an SOE fault message, if the time difference between the opening and closing of the switch in the SOE fault message is not equal to the corresponding set reclosing time, then the reclosing time of the relay protection device is determined to be abnormal.

7. The relay protection device operation status monitoring system according to claim 5, characterized in that, The acquisition unit is specifically used for: SOE fault information of relay protection devices is extracted from the SCADA master station, and the SOE fault information is preprocessed into structured data by regular expression matching and classification. The relay protection settings of the relay protection device are obtained from the setting library based on the name of the plant, feeder, or component to which the relay protection device belongs.

8. The relay protection device operation status monitoring system according to claim 5, characterized in that, It also includes: generation unit; The generation unit is used to generate an analysis report based on the status analysis results of the relay protection device by the first monitoring unit and the second monitoring unit.

9. A relay protection device operation status monitoring 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 device operation status monitoring method according to any one of claims 1-4 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 device operation status monitoring method according to any one of claims 1-4.

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