A substation bus unscheduled power-off identification and accident identification method and system

Abstract

The application discloses a substation bus unscheduled outage identification and accident identification method and system, relates to the technical field of substation accident identification, and comprises the following steps: obtaining target bus information, identifying bus associated circuit breakers according to bus interval circuit breaker position information and bus interval switch position information, judging the working state of the bus, identifying whether the bus is in an unscheduled outage state according to an identification algorithm, and outputting accident grade discrimination. The bus unscheduled outage identification and accident grade judgment method can realize automatic, real-time and online discrimination of bus unscheduled outage, can timely find bus unscheduled outage, and can give the accident event grade of the bus unscheduled outage according to actual power-off information, so that the execution efficiency and accuracy of accident event control are improved.

Description

Technical Field

[0001] This invention relates to the field of substation accident identification technology, specifically a method for identifying unplanned power outages and accidents on substation busbars. Background Technology

[0002] With the continuous and vigorous development of the national economy, the safe operation of substations has become one of the most important and fundamental ways to ensure power supply. A power outage at a substation due to equipment failure will inevitably result in significant losses. Therefore, ensuring the safe operation of substations, especially by strengthening inspections, reducing and preventing abnormal equipment operation, increasing the long-term operating time of equipment, strengthening on-site management of power production, and standardizing the behavior of all types of personnel, is of great significance for ensuring the safety of personnel, the power grid, and equipment.

[0003] Busbars are indispensable electrical equipment in substations, decisively impacting the stability of substation power system operations. A busbar fault can affect the reliability of power supply, leading to power outages, widespread blackouts, and significant losses for users. Currently, the identification and classification of power grid incidents generally rely on manual processes, which cannot guarantee timeliness or objectivity. Therefore, strengthening the analysis of the causes and types of unplanned busbar outages in substations is of great significance for ensuring the stability and reliability of substation power supply. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the above-mentioned problems, the invention provides the following technical solution: a method for identifying unplanned power outages and accidents on substation busbars.

[0006] Therefore, the problem to be solved by the present invention is to provide a method for identifying unplanned power outages and accidents on substation busbars.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a method for identifying unplanned power outages and accidents on substation busbars, comprising: acquiring target busbar information;

[0008] Identify the associated busbar circuit breakers based on the location information of the busbar bay circuit breakers and the location information of the busbar bay disconnectors;

[0009] Determine the operating status of the busbar;

[0010] The identification algorithm determines whether the busbar is in an unplanned outage state and outputs the accident level judgment.

[0011] As a preferred embodiment of the method for identifying unplanned power outages and accidents in substation busbars according to the present invention, the busbar information is obtained from the substation monitoring system, including the name of the municipal bureau of the target busbar, the name of the substation, the name of the busbar bay, the busbar voltage level, the name of the disconnect switch connected to the busbar, the name of the circuit breaker in the busbar bay, the name of the PT (potential transformer) of the busbar, and the name of the associated circuit breaker CT (current transformer).

[0012] As a preferred embodiment of the method for identifying unplanned power outages and accidents in substation busbars according to the present invention, the method involves: obtaining information on relevant branch circuit breakers and isolating switches of the target busbar from the substation monitoring system, identifying the associated circuit breakers of the busbar, and determining the circuit breakers connected to the busbar and initially in the closed position as the associated circuit breakers of the busbar; the associated branch circuit breakers include the busbar and its sections.

[0013] As a preferred embodiment of the method for identifying unplanned power outages and accidents of substation busbars according to the present invention, the method involves determining whether the busbar is out of service by judging status quantities and electrical quantities.

[0014] The state quantity is obtained by taking one auxiliary node through TWJ and another auxiliary node through the circuit breaker position. When both nodes are in the open position, it is determined that the circuit breakers connected to the bus are in the open position. The first determination is that the bus has been shut down.

[0015] Then, a second determination is made based on electrical quantities;

[0016] The electrical quantities are the bus voltage and the current of each side circuit breaker.

[0017] If the three-phase voltage of the busbar is not zero, the busbar is determined to be in an active state. When the busbar is detected to be in an active state, the time scale is recorded as t1.

[0018] If the three-phase voltage of the busbar is zero, the three-phase current of the busbar will continue to be detected. If the three-phase current of the busbar is not zero, the busbar will be determined to be in an active state.

[0019] If the three-phase current of the busbar is zero, the busbar is determined to be out of service.

[0020] As a preferred embodiment of the method for identifying unplanned power outages and accidents of substation busbars according to the present invention, the busbar outage status is divided into planned outages and unplanned outages;

[0021] The planned outage refers to the busbar being switched from operation to maintenance as planned, and all circuit breakers connected to it being switched from operation to maintenance.

[0022] The unplanned outage is caused by a busbar fault, which is cleared by the operation of busbar differential protection, circuit breaker failure protection and other backup protection, as well as the clearing of all power supply branch faults associated with the substation, resulting in a loss of voltage on the substation busbar.

[0023] As a preferred embodiment of the method for identifying unplanned power outages and accidents in substation busbars according to the present invention, if the busbar is scheduled to be shut down, all circuit breakers associated with the busbar will be manually or remotely switched from closed to open. When a circuit breaker is switched off locally or remotely, the monitoring backend receives a switch position change signal. If the monitoring backend can query all switch position change signals associated with the busbar from closed to open within a set time, it can be determined that the busbar is scheduled to be shut down. Other situations are unplanned shutdowns, including protection tripping and loss of incoming power.

[0024] In a preferred embodiment of the substation busbar unplanned power outage identification and accident identification method described in this invention, when it is determined that the busbar is unplannedly out of service, the outage time scale point is recorded using t2; when it is determined that the busbar is not out of service, the time scale point is recorded using t1.

[0025] If t2 is greater than t1, it means that the busbar has not been re-energized. Continue to obtain the status of the circuit breakers of each branch and cycle through them.

[0026] If t2 is less than t1, it means that the bus has been restored to power, and the timer stops working. The time recorded by the timer is the total power outage time. The accident level of the unplanned power outage is determined based on the total power outage time.

[0027] In substations, accident level assessment not only considers the duration of the busbar outage itself, but also the voltage level of the out-of-power busbar and whether there are other unplanned outages of busbars in the same substation.

[0028] In view of the above-mentioned problems, the invention provides the following technical solution: a substation busbar unplanned power outage identification and accident identification system.

[0029] Therefore, the technical problem solved by the present invention is: to collect information through multiple modules, determine whether the target busbar is in a shutdown state or an unplanned shutdown state, and then record the total duration of the unplanned shutdown through a timing module to determine the level of the unplanned shutdown accident of the substation busbar.

[0030] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a substation busbar unplanned power outage identification and accident identification system, comprising: an information collection module, a busbar outage judgment module, an outage category judgment module, a timing module, and an accident level judgment module;

[0031] The information collection module collects information on relevant branch circuit breakers and isolating switches of the target bus from the substation monitoring system, and identifies the associated circuit breakers of the bus.

[0032] The busbar outage detection module determines whether the target busbar is out of service by associating the circuit breaker status, three-phase voltage, and three-phase current.

[0033] The outage category determination module determines whether the target bus is in an unplanned outage state by using switch position change signals.

[0034] The timing module receives the outage type signal and begins to mark time nodes and record the total duration of unplanned outages.

[0035] The accident level determination module outputs the accident level category based on the relationship between the total unplanned downtime and a specified time period.

[0036] A computer device includes a memory and a processor, the memory storing a computer program, characterized in that the processor executes the computer program to implement the steps of the method described above.

[0037] A computer-readable storage medium having a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements the steps of the method described above.

[0038] The beneficial effects of this invention are as follows: The method for identifying unplanned bus outages and determining the accident level proposed in this invention can realize automatic, real-time, and online identification of unplanned bus outages. It can promptly detect unplanned bus outages and give the accident event level of the unplanned outage based on the actual power outage information, thereby improving the execution efficiency and accuracy of accident event management. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0040] Figure 1 The flowchart illustrates a method for identifying unplanned power outages and accidents on a substation busbar, as provided in one embodiment of the present invention.

[0041] Figure 2 A detailed flowchart of a method for identifying unplanned power outages and accidents on a substation busbar, provided as an embodiment of the present invention.

[0042] Figure 3 This is a structural diagram of a substation busbar unplanned power outage identification and accident identification system provided in one embodiment of the present invention. Detailed Implementation

[0043] The above-mentioned objects, features, and advantages of the present invention will become more apparent and understandable. The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0046] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0047] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] Example 1

[0050] Reference Figures 1-2As an embodiment of the present invention, a method for identifying unplanned power outages and accidents on substation busbars is provided, including: acquiring target busbar information, and identifying busbar-related circuit breakers based on busbar bay circuit breaker location information and busbar bay disconnector location information;

[0051] like Figure 2 As shown, the system determines the working status of the busbar, identifies whether the busbar is in an unplanned outage state based on the identification algorithm, and outputs the accident level judgment.

[0052] Busbar information is obtained from the substation monitoring system, including the name of the municipal bureau, the name of the substation, the name of the busbar bay, the busbar voltage level, the name of the disconnect switch connected to the busbar, the name of the circuit breaker in the busbar bay, the name of the PT (potential transformer) of the busbar, and the name of the associated CT (current circuit breaker).

[0053] First, obtain information on the relevant branch circuit breakers and isolating switches of the target bus from the substation monitoring system, identify the associated circuit breakers of the bus, and determine the circuit breakers connected to the bus and initially in the closed position as the associated circuit breakers of the bus.

[0054] Determine whether the busbar is out of service by checking status and electrical quantities;

[0055] If all circuit breakers are in the open position, the busbar can be determined to be out of service.

[0056] The state quantity is obtained by taking one auxiliary node through TWJ and another auxiliary node through the circuit breaker position. When both nodes are in the open position, it is determined that the circuit breakers connected to the bus are in the open position. The first determination is that the bus has been shut down.

[0057] Then, a second determination is made based on electrical quantities;

[0058] The electrical quantities are the bus voltage and the current of each side circuit breaker.

[0059] If the three-phase voltage of the busbar is not zero, the busbar is determined to be in an active state. When the busbar is detected to be in an active state, the time scale is recorded as t1.

[0060] If the three-phase voltage of the busbar is zero, the three-phase current of the busbar will continue to be detected. If the three-phase current of the busbar is not zero, the busbar will be determined to be in an active state.

[0061] If the three-phase current of the busbar is zero, the busbar is determined to be out of service.

[0062] Algorithm criteria for identifying unplanned or planned outages:

[0063] A planned outage occurs when a busbar is switched from operation to maintenance as scheduled, and all circuit breakers connected to it are also switched from operation to maintenance.

[0064] An unplanned outage occurs when there is a fault on the busbar, which is cut off by the operation of the busbar differential protection, circuit breaker failure protection and other backup protection, as well as the faults in all power supply branches associated with the substation, resulting in a loss of voltage on the substation busbar.

[0065] If the busbar is scheduled to shut down, all circuit breakers associated with the busbar will be manually or remotely switched from closed to open. When a circuit breaker is switched off locally or remotely, the monitoring backend receives a switch position change signal. If the monitoring backend can query all switch position change signals associated with the busbar from closed to open within a set time, it can be determined that the busbar is scheduled to shut down. All other situations are unplanned shutdowns, including protection tripping and loss of incoming power.

[0066] Design two time variables, t1 and t2. When an unplanned bus shutdown is detected, t2 is used to record the clock, and when a planned bus shutdown is detected, t1 is used to record the clock.

[0067] If t2 is greater than t1, it means the busbar has not been energized yet; if t2 is less than t1, it means the busbar has been energized. The timer ends, and the time recorded by the timer is the total power outage time. The accident level of the unplanned power outage is determined based on the total power outage time.

[0068] The accident level was determined in a procedural manner strictly in accordance with the accident level classification method given in the "China Southern Power Grid Co., Ltd. Power Accident Incident Investigation Procedure".

[0069] For 500kV and 220kV substations, the accident level of unplanned busbar outages should consider not only the duration of the outage itself, but also whether there are other unplanned busbar outages in the same substation.

[0070] For other voltage level bus outages, only the duration of the unplanned outage needs to be considered.

[0071] Determining whether other busbars in a substation are not scheduled to stop can be achieved simply by using the same procedure and changing the busbar information input. The duration can be determined in the program by designing timed start and stop conditions.

[0072] If other busbars in a 500kV substation are out of service, the accident level will be directly output as Level 1.

[0073] If no other busbars are out of service, start calculating the outage time. If the outage time is greater than 48 hours, output an event level 2 directly; if the outage time is greater than or equal to 24 hours and less than or equal to 48 hours, output an event level 3 directly; if the outage time is greater than or equal to 6 hours and less than or equal to 24 hours, output an event level 4 directly; if the outage time is less than or equal to 6 hours, output an event level 5 directly.

[0074] If other busbars in a 220kV substation are out of service, the accident level will be directly output as a Level 2 event.

[0075] If no other busbars are out of service, start calculating the outage time. If the outage time is greater than or equal to 36 hours, output an event level 3 directly. If the outage time is greater than or equal to 12 hours and less than or equal to 36 hours, output an event level 4 directly. If the outage time is greater than or equal to 1 hour and less than or equal to 12 hours, output an event level 5 directly.

[0076] For substations below 220kV, it is not necessary to determine whether there are other busbars; it is only necessary to determine the substation type and the outage time.

[0077] In a 110kV substation, if there is an unplanned outage, the outage time is calculated. If the outage time is greater than or equal to 24 hours, the incident level is directly output as a Level 4 event; if the outage time is greater than or equal to 2 hours and less than or equal to 24 hours, the incident level is directly output as a Level 5 event.

[0078] In a 35kV substation, if there is an unplanned outage, the outage time is calculated. If the outage time is greater than or equal to 48 hours, the incident level is directly output as a Level 4 event; if the outage time is greater than or equal to 4 hours but less than or equal to 48 hours, the incident level is directly output as a Level 5 event.

[0079] In substations with a capacity of less than 35kV, if an unplanned outage occurs, the outage time is calculated. If the outage time is greater than or equal to 24 hours, the incident level is directly output as a Level 5 event; if the outage time is greater than or equal to 12 hours but less than or equal to 24 hours, the incident level is directly output as a Level 6 event; if the outage time is greater than or equal to 4 hours but less than or equal to 1 hour, the incident level is directly output as a Level 7 event; if the outage time is greater than or equal to 1 hour but less than or equal to 4 hours, the incident level is directly output as a Level 8 event.

[0080] Example 2

[0081] Reference Figure 3 As an embodiment of the present invention, a substation busbar unplanned power outage identification and accident identification system is provided, including an information collection module, a busbar outage judgment module, an outage category judgment module, a timing module, and an accident level judgment module;

[0082] The information collection module collects information on relevant branch circuit breakers and isolating switches of the target bus from the substation monitoring system, and identifies the associated circuit breakers of the bus.

[0083] The busbar outage detection module determines whether the target busbar is out of service by associating the circuit breaker status, three-phase voltage, and three-phase current.

[0084] The outage category determination module determines whether the target bus is in an unplanned outage state by using switch position change signals.

[0085] The timing module receives the outage type signal and begins to mark time nodes and record the total duration of unplanned outages.

[0086] The accident level determination module outputs the accident level category based on the relationship between the total unplanned downtime and a specified time period.

[0087] Example 3

[0088] One embodiment of the present invention differs from the previous two embodiments in that: if the function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a 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 the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0089] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0090] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0091] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0092] Example 4

[0093] Assuming the algorithm's execution step size is 1 minute, taking a power outage incident of a power grid company as an example, the actual outage information is as follows: On March 28, 2022, at 20:47, a 110kV busbar tripped due to a fault, and power was restored to the busbar at 20:17 on March 29, 2022. The main output data of this algorithm is shown in Table 1. According to Table 1, when the algorithm reached 20:17 on March 29, 2022, the timer ended, T = 23 hours and 30 minutes. The outage time was between 2 hours and 24 hours, and the busbar was a 110kV voltage level. Therefore, this fault outage was judged as a Level 5 power accident event. The above judgment result is consistent with the human judgment result. It can be seen that this algorithm can accurately identify and judge the level of unplanned busbar outage power accident events, with fast judgment speed and no human error.

[0094] Table 1 Examples of Unplanned Outage Judgment for 110kV Busbars

[0095]

[0096]

[0097] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A substation bus unscheduled outage identification and incident discrimination method, characterized in that, include: Obtain target bus information; Identify the associated busbar circuit breakers based on the location information of the busbar bay circuit breakers and the location information of the busbar bay disconnectors; Determine the operating status of the busbar; The identification algorithm is used to determine whether the busbar is in an unplanned outage state, and the accident level is output. Determine whether the busbar is out of service by judging status and electrical quantities; The state quantity is obtained by taking one auxiliary node through TWJ and another auxiliary node through the circuit breaker position. When both nodes are in the open position, it is determined that the circuit breakers connected to the bus are in the open position. The first determination is that the bus has been shut down. Then, a second determination is made based on electrical quantities; The electrical quantities are the bus voltage and the current of each side circuit breaker. If the three-phase voltage of the busbar is not zero, the busbar is determined to be in an active state. When the busbar is detected to be in an active state, the time scale is recorded as t1. If the three-phase voltage of the busbar is zero, the three-phase current of the busbar will continue to be detected. If the three-phase current of the busbar is not zero, the busbar will be determined to be in an active state. If the three-phase current of the busbar is zero, the busbar is determined to be out of service. If the busbar is scheduled to shut down, all circuit breakers associated with the busbar will be manually or remotely switched from closed to open. When a circuit breaker is switched off locally or remotely, the monitoring backend receives a switch position change signal. If the monitoring backend can query all switch position change signals associated with the busbar from closed to open within a set time, it can be determined that the busbar is scheduled to shut down. All other situations are unplanned shutdowns, including protection tripping and loss of incoming power. When it is determined that the busbar is out of service unplanned, the outage time is recorded at t2; when it is determined that the busbar is not out of service, the time is recorded at t1. If t2 is greater than t1, it means that the busbar has not been re-energized. Continue to obtain the status of the circuit breakers of each branch and cycle through them. If t2 is less than t1, it means that the bus has been restored to power, and the timer stops working. The time recorded by the timer is the total power outage time. The accident level of the unplanned power outage is determined based on the total power outage time. In substations, accident level assessment not only considers the duration of the busbar outage itself, but also the voltage level of the out-of-power busbar and whether there are other unplanned outages of busbars in the same substation.

2. The method of substation bus unscheduled outage identification and fault identification of claim 1, wherein: The bus information is obtained from the substation monitoring system, including the substation name, bus bay name, bus voltage level, name of the disconnect switch connected to the bus, name of the circuit breaker in the bus bay, name of the PT (potential transformer) on the bus, and name of the associated CT (current circuit breaker).

3. The method for substation bus unscheduled outage identification and fault identification according to claim 1 or 2, characterized in that: Information on relevant branch circuit breakers and isolating switches of the target bus is obtained from the substation monitoring system. The associated circuit breakers of the bus are identified, and the circuit breakers connected to the bus and initially in the closed position are determined to be the associated circuit breakers of the bus. The associated branch circuit breakers include the bus and the sections.

4. The substation bus unscheduled outage identification and incident resolution method of claim 3, wherein: The busbar outage status is divided into planned outage and unplanned outage; The planned outage refers to the busbar being switched from operation to maintenance as planned, and all circuit breakers connected to it being switched from operation to maintenance. The unplanned outage is caused by a busbar fault, which is cleared by the operation of busbar differential protection, circuit breaker failure protection and other backup protection, as well as the clearing of all power supply branch faults associated with the substation, resulting in a loss of voltage on the substation busbar.

5. A substation bus unscheduled outage identification and incident discrimination system, characterized by, include: Information collection module (100), bus outage judgment module (200), outage category judgment module (300), timing module (400) and accident level judgment module (500); The information collection module (100) collects information on the relevant branch circuit breakers and isolating switches of the target bus from the substation monitoring system and identifies the associated circuit breakers of the bus. The busbar outage detection module (200) determines whether the target busbar is out of service by associating the circuit breaker status, three-phase voltage and three-phase current. The outage category determination module (300) determines whether the target bus is in an unplanned outage state by using the switch change signal; The timing module (400) is responsible for marking time nodes and recording the total duration of unplanned outages upon receiving an outage type signal. The accident level discrimination module (500) outputs the accident level category based on the relationship between the total unplanned downtime and the specified time period. 6.A computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer device is configured to perform the method according to any one of claims 1-5 when the computer program is executed by the processor. When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 4.

7. A computer readable storage medium having stored thereon a computer program, characterized in that, When the computer program is executed by the processor, it implements a method for identifying unplanned power outages and accidents on a substation busbar as described in any one of claims 1 to 4.

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